CN220107981U - Switching circuit, antenna system and vehicle - Google Patents
Switching circuit, antenna system and vehicle Download PDFInfo
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- CN220107981U CN220107981U CN202321474218.1U CN202321474218U CN220107981U CN 220107981 U CN220107981 U CN 220107981U CN 202321474218 U CN202321474218 U CN 202321474218U CN 220107981 U CN220107981 U CN 220107981U
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Abstract
The utility model discloses a switching circuit, an antenna system and a vehicle, wherein the switching circuit is applied to the antenna system of the vehicle, and the antenna system comprises an external positioning antenna, an internal positioning antenna and a positioning module; the switching circuit includes: a first diagnostic module, a controller, and a first switching module; the first diagnosis module is used for collecting the parameter value of the electrical parameter of the external positioning antenna and sending the parameter value to the controller; the controller is used for determining the working state of the external positioning antenna according to the parameter value of the electrical parameter of the external positioning antenna and sending a positioning switching signal to the first switching module when the external positioning antenna is in a fault state; and the first switching module is used for switching the built-in positioning antenna to be in a working state when receiving the positioning switching signal so as to enable the built-in positioning antenna to interact with the positioning module. The utility model can improve the safety and reliability of the vehicle.
Description
Technical Field
The utility model belongs to the technical field of vehicle communication, and particularly relates to a switching circuit, an antenna system and a vehicle.
Background
Vehicles are generally provided with an antenna system through which emergency rescue calls can be made to the outside in case of emergency. The antenna in the existing antenna system is generally an external antenna, when an accident occurs, the external antenna is damaged with a certain probability, and rescue workers are difficult to accurately position the accident position, so that rescue is affected, and life safety of the user is endangered.
Disclosure of Invention
The embodiment of the utility model provides a switching circuit, an antenna system and a vehicle, which are used for solving the problem that an external antenna is damaged with a certain probability and rescue is affected when an accident occurs in the existing vehicle in the prior art.
A first aspect of an embodiment of the present utility model provides a switching circuit, which is applied to an antenna system of a vehicle, where the antenna system includes an external positioning antenna, an internal positioning antenna, and a positioning module;
the switching circuit includes: a first diagnostic module, a controller, and a first switching module;
the first diagnosis module is respectively connected with the controller, the external positioning antenna and the first switching module, and is used for collecting the parameter value of the electrical parameter of the external positioning antenna and sending the parameter value to the controller;
the controller is connected with the first switching module and is used for determining the working state of the external positioning antenna according to the parameter value of the electrical parameter of the external positioning antenna and sending a positioning switching signal to the first switching module when the external positioning antenna is in a fault state;
the first switching module is respectively connected with the external positioning antenna, the internal positioning antenna and the positioning module and is used for switching the internal positioning antenna to be in a working state when receiving a positioning switching signal so as to enable the internal positioning antenna and the positioning module to interact.
In one embodiment, the first diagnostic module includes a current acquisition unit and the electrical parameter of the external positioning antenna is current.
In one embodiment, the current acquisition unit comprises: the current detection circuit comprises a first fuse, a current sampling resistor, a current detection amplifier chip, a first resistor, a second resistor, a first capacitor and a second capacitor;
the current detection amplifier chip is characterized in that a first sampling end is respectively connected with a second end of a first safety and a first end of a current sampling resistor, a second sampling end is respectively connected with a second end of the current sampling resistor and an input end of an external positioning antenna, a power supply end is respectively connected with an external first power supply and a first end of a first capacitor, a grounding end is respectively connected with a first ground end and a second end of the first capacitor, and an output end is respectively connected with a second end of the first resistor and a first end of the second resistor;
the first end of the first insurance is connected with the output end of the first switching module;
and the first end of the second capacitor is respectively connected with the first end of the first resistor and the current signal receiving end of the controller, and the second end of the second capacitor is respectively connected with the first ground end and the second end of the second resistor.
In one embodiment, the antenna system further comprises an external communication antenna, an internal communication antenna and a communication module;
the switching circuit further includes: a second diagnostic module and a second switching module;
the second diagnosis module is respectively connected with the controller, the external communication antenna and the second switching module and is used for collecting the parameter value of the electrical parameter of the external communication antenna and sending the parameter value to the controller;
the controller is also connected with the second switching module and is also used for determining the working state of the external communication antenna according to the parameter value of the electrical parameter of the external communication antenna and sending a communication switching signal to the second switching module when the external communication antenna is in a fault state;
and the second switching module is respectively connected with the external communication antenna, the built-in communication antenna and the communication module and is used for switching the built-in communication antenna to be in a working state when receiving a communication switching signal so as to enable the built-in communication antenna and the communication module to interact.
In one embodiment, the second diagnostic module includes a voltage acquisition unit, and the electrical parameter of the external communication antenna is voltage;
the voltage acquisition unit includes: the first diode, the third capacitor, the first voltage dividing resistor, the second voltage dividing resistor and the first inductor;
the first end of the first voltage dividing resistor is connected with the anode of the first diode, and the second end of the first voltage dividing resistor is respectively connected with the first end of the first inductor, the first end of the third capacitor and the voltage signal receiving end of the controller;
the cathode of the first diode is connected with an external second power supply, and the second end of the third capacitor is connected with a second grounding end;
and the first end of the second voltage dividing resistor is respectively connected with the output end of the second switching module, the second end of the first inductor and the input end of the external communication antenna, and the second end of the second voltage dividing resistor is connected with the second ground end.
In one embodiment, the external communication antenna comprises an external main set communication antenna and an external diversity communication antenna, and the internal communication antenna comprises an internal main set communication antenna and an internal diversity communication antenna;
the second diagnosis module comprises a first diagnosis unit and a second diagnosis unit, and the second switching module comprises a first switching unit and a second switching unit;
the first diagnosis unit is respectively connected with the controller, the external main set communication antenna and the first switching unit;
the second diagnosis unit is respectively connected with the controller, the external diversity communication antenna and the second switching unit;
the controller is respectively connected with the first switching unit and the second switching unit, and is particularly used for sending a main set communication switching signal to the first switching unit when the external main set communication antenna is in a fault state, and is particularly used for sending a diversity communication switching signal to the second switching unit when the external diversity communication antenna is in a fault state;
the first switching unit is respectively connected with the external main set communication antenna, the internal main set communication antenna and the communication module, and is particularly used for switching the internal main set communication antenna to be in a working state when receiving a main set communication switching signal;
the second switching unit is respectively connected with the external diversity communication antenna, the internal diversity communication antenna and the communication module, and is specifically used for switching the internal diversity communication antenna to be in a working state when receiving diversity communication switching signals.
In one embodiment, the antenna system further comprises a power module for powering the external positioning antenna;
the switching circuit also comprises a third switching module connected between the power supply module and the external positioning antenna;
the controller is also used for sending a power-off signal to the third switching module when an external dormancy instruction is received;
the third switching module is controlled by the controller and is used for breaking when receiving a power-off signal so as to enable the power supply module to stop supplying power to the external positioning antenna.
A second aspect of an embodiment of the present utility model provides an antenna system, including a switching circuit according to any one of the first aspect, the antenna system further including a positioning antenna module, the positioning antenna module including an external positioning antenna, an internal positioning antenna, and a positioning module.
In one embodiment, the antenna system further comprises a communication antenna module, wherein the communication antenna module comprises an external communication antenna, an internal communication antenna and a communication module;
the positioning antenna module further comprises a positioning antenna connector connected between the first switching module and the external positioning antenna;
the communication antenna module further includes a communication antenna connector coupled between the first switching module and the external communication antenna.
A third aspect of an embodiment of the utility model provides a vehicle comprising an antenna system as in any of the second aspects above.
Compared with the prior art, the embodiment of the utility model has the beneficial effects that: and setting a switching circuit, acquiring the electrical parameters of the external positioning antenna through a first diagnosis module in the switching circuit, judging by a controller, and judging the fault of the external positioning antenna when the electrical parameters deviate from normal values obviously. When the external positioning antenna fails, a positioning switching signal is sent to the first switching module to start the internal positioning antenna to work, so that the internal positioning antenna and the positioning module interact, the vehicle can be emergently positioned through the internal positioning antenna when the external positioning antenna is damaged, the accident position of the vehicle is timely confirmed, rescue workers can be timely rescued, the life safety of drivers and passengers can be guaranteed to the greatest extent, and the safety and reliability of the vehicle are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a switching circuit according to an embodiment of the present utility model;
fig. 2 is a schematic circuit diagram of a current collecting unit according to an embodiment of the present utility model;
fig. 3 is a schematic circuit diagram of a first switching module according to an embodiment of the utility model;
fig. 4 is a schematic circuit diagram of a protection module according to an embodiment of the present utility model;
fig. 5 is a schematic diagram of another switching circuit according to an embodiment of the present utility model;
fig. 6 is a schematic circuit diagram of a voltage acquisition unit according to an embodiment of the present utility model;
fig. 7 is a schematic structural diagram of a switching circuit according to another embodiment of the present utility model.
Detailed Description
In order to make the present solution better understood by those skilled in the art, the technical solution in the present solution embodiment will be clearly described below with reference to the accompanying drawings in the present solution embodiment, and it is obvious that the described embodiment is an embodiment of a part of the present solution, but not all embodiments. All other embodiments, based on the embodiments in this solution, which a person of ordinary skill in the art would obtain without inventive faculty, shall fall within the scope of protection of this solution.
The term "comprising" in the description of the present solution and the claims and in the above-mentioned figures, as well as any other variants, means "including but not limited to", intended to cover a non-exclusive inclusion, and not limited to only the examples listed herein. Furthermore, the terms "first" and "second," etc. are used for distinguishing between different objects and not for describing a particular sequential order.
The implementation of the utility model is described in detail below with reference to the specific drawings:
fig. 1 is a schematic structural diagram of a switching circuit according to an embodiment of the present utility model, and as shown in fig. 1, the embodiment of the present utility model provides a switching circuit, which is applied to an antenna system of a vehicle, and the antenna system may include an external positioning antenna 21, an internal positioning antenna 22 and a positioning module 23.
The switching circuit includes: a first diagnostic module 11, a controller 12 and a first switching module 13.
The first diagnosis module 11 is respectively connected with the controller 12, the external positioning antenna 21 and the first switching module 13, and is used for acquiring a parameter value of an electrical parameter of the external positioning antenna 21 and sending the parameter value to the controller 12.
The controller 12 is connected to the first switching module 13, and is configured to determine an operating state of the external positioning antenna 21 according to a parameter value of an electrical parameter of the external positioning antenna 21, and send a positioning switching signal to the first switching module 13 when the external positioning antenna 21 is in a fault state.
The first switching module 13 is respectively connected with the external positioning antenna 21, the internal positioning antenna 22 and the positioning module 23, and is used for switching the internal positioning antenna 22 to be in a working state when receiving a positioning switching signal so as to enable the internal positioning antenna 22 and the positioning module 23 to interact.
The external positioning antenna 21 may be an external GNSS (Global Navigation Satellite System ) antenna, the internal positioning antenna 22 may be an internal GNSS antenna, and the controller 12 may be an MCU (Microcontroller Unit, micro control unit).
The first switching module 13 may be a single pole double throw switch, and in particular may be an SPDT (Single Pole Double Throw ) radio frequency switch.
In the embodiment of the present utility model, the external positioning antenna 21 and the internal positioning antenna 22 are active antennas, so the first diagnostic module 11 may collect a parameter value of an electrical parameter of the external positioning antenna 21, send the parameter value to the controller 12, and the controller 12 determines whether the external positioning antenna 21 has a fault. The electrical parameter may be voltage, current, power, etc., which is a parameter for determining whether the antenna is faulty or not conventionally in the art.
Alternatively, when the electrical parameter of the external positioning antenna 21 is voltage, the first diagnostic module 11 may be a voltage acquisition unit, and may acquire the voltage of the external positioning antenna 21. When the electrical parameter of the external positioning antenna 21 is current, the first diagnostic module 11 may be a current collecting unit, and may collect the current of the external positioning antenna 21. When the electrical parameter of the external positioning antenna 21 is power, the first diagnostic module 11 may be a power collecting unit, and may collect the power of the external positioning antenna 21. The specific hardware circuit can be set according to actual conditions.
The controller 12 can determine the working state of the external positioning antenna 21 according to the parameter value of the electrical parameter of the external positioning antenna 21 sent by the first diagnostic module 11, and send a positioning switching signal to the first switching module 13 when determining that the external positioning antenna 21 is in a fault state, so that the first switching module 13 switches states, and finally the internal positioning antenna 22 and the positioning module 21 interact to ensure the reliability of vehicle positioning.
Specifically, the first switching module 13 has a movable end connected to the positioning module 23, a first stationary end connected to the input end of the external positioning antenna 21, and a second stationary end connected to the internal positioning antenna 22.
Under the normal state, the movable end of the first switching module 13 is connected with the first fixed end, so that the external positioning antenna 21 and the positioning module 23 interact, and the positioning module 23 is ensured to acquire the current position of the vehicle through the external positioning antenna 21.
When the external positioning antenna 21 fails, the first switching module 13 can be controlled to perform state switching, and the movable end of the first switching module 13 is controlled to be connected with the second fixed end, so that the internal positioning antenna 22 and the positioning module 23 interact, the positioning module 23 is ensured to know the current position of the vehicle through the internal positioning antenna 22, and the positioning accuracy and reliability are ensured.
For example, the first diagnostic module 11 may collect the current on the external positioning antenna 21, and the controller 12 monitors the working state of the external positioning antenna 21 through the current.
Normally, the operating current of the external positioning antenna 21 is around 50mA and does not exceed 50mA.
When the controller 12 detects that the working current of the external positioning antenna 21 is greater than 50mA, it can determine that the external positioning antenna is in a fault state and is in a short circuit fault, and at this time, a positioning switching signal is sent to the first switching module 13 to cut off the working of the external positioning antenna 21, so that the internal positioning antenna 22 interacts with the positioning module, and the reliability of vehicle positioning is ensured.
When the controller 12 detects that the working current of the external positioning antenna 21 is 0, it can determine that the external positioning antenna is in a fault state and is in a short circuit fault, and at this time, a positioning switching signal is sent to the first switching module 13 to cut off the working of the external positioning antenna 21, so that the internal positioning antenna 22 interacts with the positioning module, and the reliability of vehicle positioning is ensured.
Other types of electrical parameter determination logic are similar and are conventional in the art as to whether a positioning antenna is malfunctioning.
According to the embodiment of the utility model, when the external positioning antenna fails, the controller sends the positioning switching signal to the first switching module to start the internal positioning antenna to work, so that the internal positioning antenna and the positioning module interact, the internal positioning antenna can be used for carrying out emergency positioning when the vehicle is in an accident and the external positioning antenna is damaged, the accident position of the vehicle is timely confirmed, rescue staff can be ensured to rescue in time, the life safety of drivers and passengers is guaranteed to the greatest extent, and the safety and reliability of the vehicle are improved.
As shown in fig. 1, in one embodiment of the present utility model, after determining that the external positioning antenna 21 is recovered, the controller 12 sends a positioning recovery signal to the first switching module 13, so that the first switching module 13 recovers to a default state, that is, cuts off the interaction between the internal positioning antenna 22 and the positioning module 23, and controls the external positioning antenna 21 to continue to interact with the positioning module 23.
In some embodiments of the present utility model, the first diagnostic module includes a current acquisition unit, and the electrical parameter of the external positioning antenna is current.
Fig. 2 is a schematic circuit diagram of a current collecting unit according to an embodiment of the present utility model, and as shown in fig. 2, the current collecting unit may specifically include: the current detection circuit comprises a first protection F1, a current sampling resistor CY, a current detection amplifier chip U1, a first resistor R1, a second resistor R2, a first capacitor C1 and a second capacitor C2;
the current detection amplifier chip U1, the first sampling end is connected with the second end of the first safety F1 and the first end of the current sampling resistor CY respectively, the second sampling end is connected with the second end of the current sampling resistor CY and the input end of the external positioning antenna 21 respectively, the power supply end is connected with the external first power supply VCC1 and the first end of the first capacitor C1 respectively, the grounding end is connected with the first ground end GND1 and the second end of the first capacitor C1 respectively, and the output end is connected with the second end of the first resistor R1 and the first end of the second resistor R2 respectively;
the first end of the first protection F1 is connected with the output end of the first switching module 13;
and a first end of the second capacitor C2 is connected to the first end of the first resistor R1 and the current signal receiving end of the controller 12, and a second end of the second capacitor C2 is connected to the first ground end GND1 and the second end of the second resistor R2.
The first power VCC1 may be a 3.3V power supply, and the sampling resistor CY may be a 1Ω high-precision resistor.
The current of the external positioning antenna 21 passes through a sampling resistor CY of 1 omega, amplifies the voltage at two ends of the sampling resistor CY through a current detection amplifier chip U1, and is connected with a current signal receiving end of the controller 12 so as to send the current of the external positioning antenna to the controller 12.
When an abnormal situation exists from the controller 12 to the external positioning antenna, the controller 12 can switch the positioning antenna path from the external positioning antenna to the internal positioning antenna by controlling the first switching module 13.
For example, the first switching module 13 may be an SPDT radio frequency switch, and fig. 3 is a schematic circuit diagram of the first switching module according to an embodiment of the present utility model, and as shown in fig. 3, the controller 12 may implement the path switching by controlling the enable terminal VCTL1 or VCTL2 of the SPDT radio frequency switch.
As shown in fig. 3, when VCTL 1=0 and VCTL 2=1, PC-P1 is turned on, and the positioning module 23 interacts with the external positioning antenna 21. When VCTL 1=1 and VCTL 2=0, PC-P2 is turned on, and positioning module 22 interacts with the built-in positioning antenna.
In some embodiments of the present utility model, the switching circuit may further include a protection module connected between the external positioning antenna and the first switching module for anti-reflection, ESD (electrostatic discharge) and filtering.
Fig. 4 is a schematic circuit diagram of a protection module according to an embodiment of the present utility model, as shown in fig. 4, an anti-reflection diode D may be disposed to implement current anti-reflection, and an ESD may be implemented by disposing a bidirectional breakdown diode D0, so that the operational reliability of the switching circuit may be improved.
Fig. 5 is a schematic structural diagram of another switching circuit according to an embodiment of the present utility model, as shown in fig. 5, in an embodiment of the present utility model, the antenna system further includes an external communication antenna 24, an internal communication antenna 25, and a communication module 26.
The switching circuit further includes: a second diagnostic module 14 and a second switching module 15.
The second diagnosis module 14 is respectively connected with the controller 12, the external communication antenna 24 and the second switching module 15, and is used for acquiring a parameter value of an electrical parameter of the external communication antenna 24 and sending the parameter value to the controller 12.
The controller 12 is further connected to the second switching module 15, and is further configured to determine an operating state of the external communication antenna 24 according to a parameter value of the electrical parameter of the external communication antenna 24, and send a communication switching signal to the second switching module 15 when the external communication antenna 24 is in a fault state.
The second switching module 15 is respectively connected to the external communication antenna 24, the internal communication antenna 25 and the communication module 26, and is configured to switch the internal communication antenna 25 to be in an operating state when receiving a communication switching signal, so that the internal communication antenna 25 and the communication module 26 interact.
The second switching module 15 may be a single pole double throw switch, and may specifically be an SPDT radio frequency switch.
In an embodiment of the present utility model, the second diagnostic module 14 may collect a parameter value of the electrical parameter of the external communication antenna 24, and send the parameter value to the controller 12, and the controller 12 determines whether the external communication antenna 24 is malfunctioning. The electrical parameter may be voltage, current, power, etc., which is a parameter for determining whether the antenna is faulty or not conventionally in the art.
Alternatively, when the electrical parameter of the external communication antenna 24 is voltage, the second diagnostic module 14 may be a voltage acquisition unit, and may acquire the voltage of the external communication antenna 24. When the electrical parameter of the external communication antenna 24 is current, the second diagnostic module 14 may be a current collection unit, and may collect the current of the external communication antenna 24. When the electrical parameter of the external communication antenna 24 is power, the second diagnostic module 14 may be a power collecting unit, and may collect the power of the external communication antenna 24. The specific hardware circuit can be set according to actual conditions.
The controller 12 may determine the working state of the external communication antenna 24 according to the parameter value of the electrical parameter of the external communication antenna 24 sent by the second diagnostic module 14, and send a communication switching signal to the second switching module 15 when determining that the external communication antenna 24 is in the fault state, so that the second switching module 15 switches the state, and finally the internal communication antenna 25 and the communication module 26 interact to ensure the reliability of vehicle communication.
Specifically, the second switching module 15 has a movable end connected to the communication module 26, a first stationary end connected to the input end of the external communication antenna 24, and a second stationary end connected to the internal communication antenna 25.
In a normal state, the movable end of the second switching module 15 is connected with the first fixed end, so that the external communication antenna 24 and the communication module 26 interact, and the communication module 26 is ensured to communicate with the outside through the external communication antenna 24.
When the external communication antenna 24 fails, the second switching module 15 can be controlled to perform state switching, and the movable end of the second switching module 15 is controlled to be connected with the second fixed end, so that the internal communication antenna 25 and the communication module 26 interact, and the communication module 26 is ensured to communicate with the outside through the internal communication antenna 26, so that smooth communication can be maintained during emergency rescue.
For example, the second diagnostic module 15 may collect the divided voltage on the external communication antenna 24, and the controller 12 monitors the operating state of the external communication antenna 24 through the divided voltage.
When the controller 12 detects that the divided voltage of the external communication antenna 24 is 0, it indicates that the external communication antenna 24 is in a fault state and is in a short circuit fault, and at this time, a communication switching signal is sent to the second switching module 15 to cut off the operation of the external communication antenna 24, so that the internal communication antenna 25 interacts with the communication module 26, and the reliability of the vehicle and the external communication is ensured.
Other types of electrical parameter determination logic are similar and are conventional in the art as to whether a positioning antenna is malfunctioning.
According to the embodiment of the utility model, when the external communication antenna fails, the controller sends the communication switching signal to the second switching module to start the internal communication antenna to work, so that the internal communication antenna and the communication module interact, emergency rescue conversation can be carried out through the internal communication antenna when the vehicle is in an accident and the external communication antenna is damaged, the condition that a person in the vehicle can be known in real time by a rescuer is ensured, the life safety of drivers and passengers is ensured to the greatest extent, and the safety and reliability of the vehicle are improved.
In some embodiments of the present utility model, the second diagnostic module includes a voltage acquisition unit, and the electrical parameter of the external communication antenna is voltage.
Fig. 6 is a schematic circuit diagram of a voltage acquisition unit according to an embodiment of the present utility model, as shown in fig. 6, in one embodiment of the present utility model, the voltage acquisition unit includes: the first diode D1, the third capacitor C3, the first voltage dividing resistor RF1, the second voltage dividing resistor RF2 and the first inductor L1.
The first voltage dividing resistor RF1 has a first end connected to the anode of the first diode D1, and a second end connected to the first end of the first inductor L1, the first end of the third capacitor C3, and the voltage signal receiving end of the controller 12, respectively.
The cathode of the first diode D1 is connected to the external second power source VCC2, and the second end of the third capacitor C2 is connected to the second ground GND 2.
The first end of the second voltage dividing resistor RF2 is connected to the output end of the second switching module 14, the second end of the first inductor L1, and the input end of the external communication antenna 24, and the second end is connected to the second ground GND 2.
Optionally, the switching circuit may further be provided with a communication antenna connector, and the communication antenna connector is connected between the second switching module and the external communication antenna, and the second voltage dividing resistor RF2 may be disposed inside the communication antenna connector.
The second power terminal VCC2 is, for example, a 3.3V power supply.
When the controller 12 detects that the divided voltage of the external communication antenna 24 is 0, it indicates that the external communication antenna 24 is in a fault state and is in a short circuit fault, and at this time, a communication switching signal is sent to the second switching module 15 to cut off the operation of the external communication antenna 24, so that the internal communication antenna 25 interacts with the communication module 26.
When the controller 12 detects that the divided voltage of the external communication antenna 24 is (3.3V-V D1 ) When/2, the external communication antenna is in a normal state, and the communication switching signal is not sent to the second switching module 15, and the external communication antenna 24 continues to communicate with the communication module26 interactions, wherein V D1 Representing the voltage drop of the first diode.
When the controller 12 detects that the divided voltage of the external communication antenna 24 is (3.3V-V D1 ) When the external communication antenna is in a fault state and is in an open circuit fault, a communication switching signal is sent to the second switching module 15 to cut off the operation of the external communication antenna 24, so that the internal communication antenna 25 interacts with the communication module 26.
Fig. 7 is a schematic diagram of a switching circuit according to another embodiment of the present utility model, as shown in fig. 7, in some embodiments of the present utility model, the external communication antenna 24 includes an external main set communication antenna 241 and an external diversity communication antenna 242, and the internal communication antenna 25 includes an internal main set communication antenna 251 and an internal diversity communication antenna 252.
The second diagnostic module 14 includes a first diagnostic unit 141 and a second diagnostic unit 142, and the second switching module 15 includes a first switching unit 151 and a second switching unit 152.
The first diagnosis unit 141 is connected to the controller 12, the external main set communication antenna 241, and the first switching unit 151, respectively.
The first diagnostic unit 141 is specifically configured to collect a parameter value of an electrical parameter of the external main set communication antenna 241, and send the parameter value to the controller 12.
The second diagnostic unit 142 is connected to the controller 12, the external diversity communication antenna 242, and the second switching unit 152, respectively.
The second diagnostic unit 142 is specifically configured to collect a parameter value of the electrical parameter of the external diversity communication antenna 242, and send the parameter value to the controller 12.
The controller 12 is respectively connected to the first switching unit 151 and the second switching unit 152, and is specifically configured to send a main set communication switching signal to the first switching unit 151 when the external main set communication antenna 241 is in a fault state, and is specifically configured to send a diversity communication switching signal to the second switching unit 152 when the external diversity communication antenna 242 is in a fault state.
The controller 12 is specifically configured to determine an operating state of the external main set communication antenna 241 according to a parameter value of an electrical parameter of the external main set communication antenna 241, send a main set communication switching signal to the first switching unit 151 when the external main set communication antenna 241 is in a fault state, and determine an operating state of the external diversity communication antenna 242 according to a parameter value of an electrical parameter of the external diversity communication antenna 242, and send a diversity communication switching signal to the second switching unit 152 when the external diversity communication antenna 242 is in a fault state.
The first switching unit 151 is respectively connected to the external main set communication antenna 241, the internal main set communication antenna 251 and the communication module 26, and is specifically configured to switch the internal main set communication antenna 251 to be in an operating state when receiving a main set communication switching signal, so that the internal main set communication antenna 251 and the communication module 26 interact.
The second switching unit 152 is respectively connected to the external diversity communication antenna 242, the internal diversity communication antenna 252, and the communication module 26, and specifically configured to switch the internal diversity communication antenna 252 to be in an operating state when receiving the diversity communication switching signal, so that the internal diversity communication antenna 252 and the communication module 26 interact.
The communication antenna in the antenna system of the vehicle can comprise a main set communication antenna and a diversity communication antenna, wherein the main set communication antenna is responsible for transmitting and receiving radio frequency signals, the diversity communication antenna only receives the radio frequency signals and does not transmit the radio frequency signals, and the diversity communication antenna can counteract the influence of fast fading on the received signals, so that the reliability of signal transmission is improved.
By providing the first diagnosis unit 141 and the first switching unit 151, the operation switching of the external main set communication antenna and the internal main set communication antenna can be realized, and the reliable operation of the main set communication antenna is ensured. By providing the second diagnosis unit 142 and the second switching unit 152, the operation switching of the external diversity communication antenna and the internal diversity communication antenna can be realized, and the reliable operation of the diversity communication antenna is ensured. Through the arrangement, the reliability of vehicle communication can be improved, and the probability that the vehicle cannot send rescue information to the outside when an accident occurs is reduced.
In some embodiments of the utility model, the antenna system further comprises a power module for powering the external positioning antenna.
The switching circuit further comprises a third switching module connected between the power supply module and the external positioning antenna.
And the controller is also used for sending a power-off signal to the third switching module when receiving an external dormancy instruction.
The third switching module is controlled by the controller and is used for breaking when receiving a power-off signal so as to enable the power supply module to stop supplying power to the external positioning antenna.
The external positioning antenna is an active antenna, the power supply module can supply power for the external positioning antenna, and when the external positioning antenna is needed to sleep, the consumption power is reduced, the controller can respond to an external sleep instruction and send a power-off signal to the third switching module, so that the power supply module stops supplying power to the external positioning antenna, and the external positioning antenna is in a sleep state.
After the controller sends the power-off signal to the third switching module, the controller does not send the positioning switching signal to the first switching module before the external positioning antenna is awakened, so that the internal positioning antenna is prevented from working during the sleep period of the external positioning antenna.
According to the embodiment of the utility model, the third switching module is arranged, so that the power consumption of the whole vehicle can be reduced under a certain condition, and excessive power consumption is avoided.
The switching system in the embodiment of the utility model further comprises an indicator light module connected with the controller, and when the external positioning antenna fails, the controller can light the indicator light module to remind a user of the vehicle failure. The indicator light module may be a fault indicator light of a dashboard of the vehicle.
In one embodiment of the utility model, when the external communication antenna fails, the controller will illuminate the indicator light module to alert the user to the failure of the vehicle.
Specifically, when the external main set communication antenna fails and/or the external communication diversity antenna fails, the controller can light the failure indication lamp module to remind a user of vehicle failure.
The embodiment of the utility model also provides an antenna system, which comprises the switching circuit of any embodiment, and further comprises a positioning antenna module, wherein the positioning antenna module comprises an external positioning antenna, an internal positioning antenna and a positioning module.
In addition, the antenna system also comprises a communication antenna module, wherein the communication antenna module comprises an external communication antenna, an internal communication antenna and a communication module.
The positioning antenna module further comprises a positioning antenna connector connected between the first switching module and the external positioning antenna.
The communication antenna module further includes a communication antenna connector coupled between the first switching module and the external communication antenna.
The embodiment of the utility model also provides a fault diagnosis strategy corresponding to the antenna system, comprising fault diagnosis of the communication antenna and fault diagnosis of the positioning antenna, and the method comprises the following steps:
communication antenna fault diagnosis: the controller diagnoses once when powering on, and then starts detection every 1s, 3 times (1000 ms interval each time) are continuous in each detection, and an open circuit/short circuit state is detected, if an external communication antenna fault is detected, the controller switches to a built-in communication antenna, wherein the time interval of 1s can be set and adjusted according to actual requirements.
Positioning antenna fault diagnosis: the controller diagnoses once when powering on, and then starts detection every 1s, and 3 times (1000 ms interval each time) are continuous in every detection, detects open circuit/short circuit state, and switches to built-in positioning antenna if detecting external positioning antenna trouble, and wherein 1s interval can set and adjust according to actual demand.
Specifically, table 1 below is an exemplary illustration of a fault diagnosis strategy:
table 1 exemplary illustrations of fault diagnosis strategies
The embodiment of the utility model can realize the fault diagnosis of the vehicle antenna, can set different diagnosis frequencies according to different fault diagnosis requirements, and can adapt to most diagnosis scenes by flexibly configuring the diagnosis frequencies.
The embodiment of the utility model also provides a vehicle comprising the antenna system.
Considering that the existing vehicle is only provided with an external antenna, once a serious traffic accident occurs to the vehicle, the external main antenna is damaged with great probability, so that emergency rescue call and MSD (minimum data set) data uploading cannot be performed, and life safety of a user is endangered. The MSD data is a set of the most simplified data comprising vehicle positions, passengers, basic vehicle information, vehicle running directions and the like.
The embodiment of the utility model provides a switching circuit, an antenna system and a vehicle, which can timely and rapidly switch to an internal antenna when an external antenna fails, and ensure emergency rescue communication.
In addition, the switching circuit fully considers ESD and surge protection, and the working reliability of the switching circuit is greatly improved. The embodiment of the utility model provides an antenna system is mostly 4G antenna, and 5G's communication antenna stand-by antenna also can consult this design, specifically can dispose according to actual conditions.
The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. The switching circuit is characterized by being applied to an antenna system of a vehicle, wherein the antenna system comprises an external positioning antenna, an internal positioning antenna and a positioning module;
the switching circuit includes: a first diagnostic module, a controller, and a first switching module;
the first diagnosis module is respectively connected with the controller, the external positioning antenna and the first switching module and is used for collecting the parameter value of the electrical parameter of the external positioning antenna and sending the parameter value to the controller;
the controller is connected with the first switching module and is used for determining the working state of the external positioning antenna according to the parameter value of the electrical parameter of the external positioning antenna and sending a positioning switching signal to the first switching module when the external positioning antenna is in a fault state;
the first switching module is respectively connected with the external positioning antenna, the internal positioning antenna and the positioning module and is used for switching the internal positioning antenna to be in a working state when receiving the positioning switching signal so as to enable the internal positioning antenna to interact with the positioning module.
2. The switching circuit of claim 1 wherein the first diagnostic module comprises a current acquisition unit and the electrical parameter of the external positioning antenna is current.
3. The switching circuit of claim 2, wherein the current acquisition unit comprises: the current detection circuit comprises a first fuse, a current sampling resistor, a current detection amplifier chip, a first resistor, a second resistor, a first capacitor and a second capacitor;
the current detection amplifier chip is characterized in that a first sampling end is respectively connected with a second end of the first fuse and a first end of the current sampling resistor, a second sampling end is respectively connected with a second end of the current sampling resistor and an input end of the external positioning antenna, a power supply end is respectively connected with an external first power supply and a first end of the first capacitor, a grounding end is respectively connected with a first ground end and a second end of the first capacitor, and an output end is respectively connected with a second end of the first resistor and a first end of the second resistor;
the first end of the first insurance is connected with the output end of the first switching module;
and the first end of the second capacitor is respectively connected with the first end of the first resistor and the current signal receiving end of the controller, and the second end of the second capacitor is respectively connected with the first ground end and the second end of the second resistor.
4. The switching circuit of claim 1 wherein the antenna system further comprises an external communication antenna, an internal communication antenna, and a communication module;
the switching circuit further includes: a second diagnostic module and a second switching module;
the second diagnosis module is respectively connected with the controller, the external communication antenna and the second switching module and is used for collecting the parameter value of the electrical parameter of the external communication antenna and sending the parameter value to the controller;
the controller is further connected with the second switching module, and is further configured to determine an operating state of the external communication antenna according to a parameter value of an electrical parameter of the external communication antenna, and send a communication switching signal to the second switching module when the external communication antenna is in a fault state;
the second switching module is respectively connected with the external communication antenna, the internal communication antenna and the communication module and is used for switching the internal communication antenna to be in a working state when receiving a communication switching signal so as to enable the internal communication antenna to interact with the communication module.
5. The switching circuit of claim 4, wherein the second diagnostic module comprises a voltage acquisition unit, and the electrical parameter of the external communication antenna is voltage;
the voltage acquisition unit includes: the first diode, the third capacitor, the first voltage dividing resistor, the second voltage dividing resistor and the first inductor;
the first end of the first voltage dividing resistor is connected with the anode of the first diode, and the second end of the first voltage dividing resistor is respectively connected with the first end of the first inductor, the first end of the third capacitor and the voltage signal receiving end of the controller;
the cathode of the first diode is connected with an external second power supply, and the second end of the third capacitor is connected with a second grounding end;
and the first end of the second voltage dividing resistor is respectively connected with the output end of the second switching module, the second end of the first inductor and the input end of the external communication antenna, and the second end of the second voltage dividing resistor is connected with the second ground end.
6. The switching circuit of claim 4 wherein the external communication antennas comprise an external main set communication antenna and an external diversity communication antenna, and the internal communication antennas comprise an internal main set communication antenna and an internal diversity communication antenna;
the second diagnosis module comprises a first diagnosis unit and a second diagnosis unit, and the second switching module comprises a first switching unit and a second switching unit;
the first diagnosis unit is respectively connected with the controller, the external main set communication antenna and the first switching unit;
the second diagnosis unit is respectively connected with the controller, the external diversity communication antenna and the second switching unit;
the controller is respectively connected with the first switching unit and the second switching unit, and is specifically used for sending a main set communication switching signal to the first switching unit when the external main set communication antenna is in a fault state, and is specifically used for sending a diversity communication switching signal to the second switching unit when the external diversity communication antenna is in a fault state;
the first switching unit is respectively connected with the external main set communication antenna, the internal main set communication antenna and the communication module, and is specifically used for switching the internal main set communication antenna to be in a working state when receiving the main set communication switching signal;
the second switching unit is respectively connected with the external diversity communication antenna, the internal diversity communication antenna and the communication module, and is specifically used for switching the internal diversity communication antenna to be in a working state when receiving the diversity communication switching signal.
7. The switching circuit according to any one of claims 1 to 6, wherein the antenna system further comprises a power supply module for supplying power to the external positioning antenna;
the switching circuit further comprises a third switching module connected between the power supply module and the external positioning antenna;
the controller is further configured to send a power-off signal to the third switching module when receiving an external sleep instruction;
the third switching module is controlled by the controller and is used for breaking when the power-off signal is received, so that the power supply module stops supplying power to the external positioning antenna.
8. An antenna system comprising a switching circuit according to any one of claims 1 to 7, the antenna system further comprising a positioning antenna module comprising an external positioning antenna, an internal positioning antenna and a positioning module.
9. The antenna system of claim 8, further comprising a communication antenna module comprising an external communication antenna, an internal communication antenna, a communication module;
the positioning antenna module further comprises a positioning antenna connector connected between the first switching module and the external positioning antenna;
the communication antenna module further includes a communication antenna connector coupled between the first switching module and the external communication antenna.
10. A vehicle comprising an antenna system according to claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321474218.1U CN220107981U (en) | 2023-06-09 | 2023-06-09 | Switching circuit, antenna system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321474218.1U CN220107981U (en) | 2023-06-09 | 2023-06-09 | Switching circuit, antenna system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220107981U true CN220107981U (en) | 2023-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321474218.1U Active CN220107981U (en) | 2023-06-09 | 2023-06-09 | Switching circuit, antenna system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220107981U (en) |
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2023
- 2023-06-09 CN CN202321474218.1U patent/CN220107981U/en active Active
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