CN115685826B - Signal acquisition system - Google Patents
Signal acquisition systemInfo
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- CN115685826B CN115685826B CN202211321198.4A CN202211321198A CN115685826B CN 115685826 B CN115685826 B CN 115685826B CN 202211321198 A CN202211321198 A CN 202211321198A CN 115685826 B CN115685826 B CN 115685826B
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Abstract
The application relates to a signal acquisition system. The system comprises: the controller controls the intermediate connection module to select different signal transmission channels through the processing module, establishes a plurality of signal transmission channels through the intermediate connection module, does not need to be additionally provided with a plurality of mutually independent acquisition lines respectively, compared with each acquisition line in the prior art, the device corresponding to each acquisition line is reduced, the hardware cost is saved, the occupied space is reduced, the controller switches the signal transmission channels through controlling the intermediate connection module, and the controller does not directly interact with the signal acquisition module, so that the controller does not interfere with acquisition analog signals acquired by the signal acquisition module when switching the signal transmission channels, and the acquisition precision of the acquisition analog signals is improved.
Description
Technical Field
The application relates to the technical field of electronic information, in particular to a signal acquisition system.
Background
Most of the existing signal collectors can only realize the detection of a single signal, but the single signal collection channel cannot meet the production requirement, in some scenes, the key signals are required to be collected simultaneously, and some related signals are required to be collected synchronously, the existing partial systems collect the signals through multiple paths of sensors, each path of collection circuit is relatively independent, each path of collection circuit is directly interacted with a controller, so that different collection circuits are selected, but the circuit connection structure of the mode possibly has the risk of circuit coupling interference, namely the controller can interfere the collection signals of the collection circuits when selecting the collection circuits, and the collection precision is low.
Disclosure of Invention
In order to solve the technical problem of low signal acquisition precision of the multi-channel acquisition circuit, the application provides a signal acquisition system.
The application provides a signal acquisition system, comprising:
The controller is used for generating a corresponding control signal according to the received input instruction;
The processing module is electrically connected with the controller and is used for converting the control signals to generate register signals;
the intermediate connection module is electrically connected with the processing module, and a plurality of signal transmission channels are established between the intermediate connection module and the signal acquisition module and used for starting a target transmission channel according to the register signals, wherein the target transmission channel comprises at least one signal transmission channel;
The signal acquisition module is used for acquiring a plurality of different acquisition analog signals and transmitting the acquisition analog signals to the processing module through the target transmission channel and the intermediate connection module in sequence, and each signal transmission channel is used for transmitting one acquisition analog signal.
Optionally, the intermediate connection module includes a multiplexer, multiple input ends of the multiplexer are electrically connected with the signal acquisition module, and are used for establishing multiple signal transmission channels with the signal acquisition module, and output ends of the multiplexer are electrically connected with the processing module.
Optionally, the input end of the multiplexer includes a first input end and a second input end that are arranged in pairs, the first input end is electrically connected with the signal acquisition module to form a first circuit, the second input end is electrically connected with the signal acquisition module to form a second circuit, and the first circuit and the second circuit form a signal transmission channel.
Optionally, the intermediate connection module includes a first resistor and a second resistor, a first node on the first line is further electrically connected to the positive electrode of the analog signal source through the first resistor, and a second node on the second line is further electrically connected to the negative electrode of the analog signal source through the second electron.
Optionally, the processing module includes a gain amplifier, each expansion port of the gain amplifier is connected to each signal output end of the multiplexer, the number of expansion ports is the same as the number of control lines corresponding to the register signals, the signal transmission ends of the gain amplifier are electrically connected with the controller, the number of signal transmission ends is the same as the number of control lines corresponding to the control signals, the first power end of the gain amplifier is electrically connected with the anode of the analog signal source, and the second power end of the gain amplifier is electrically connected with the cathode of the analog signal source.
Optionally, the gain amplifier is further configured to convert the acquisition analog signal from the multiplexer into an acquisition digital signal and send the acquisition digital signal to the controller.
Optionally, the processing module further includes an isolation chip, a first end of the isolation chip is electrically connected with the gain amplifier, and a second end of the isolation chip is electrically connected with the controller, and is used for isolating the collected digital signal from the gain amplifier from the collected analog signal and transmitting only the collected digital signal to the controller.
Optionally, the controller is further configured to perform burnout detection according to the received acquired digital signal, so as to obtain a corresponding burnout detection result.
Optionally, the controller determines that the corresponding burnout detection result is burnout when the voltage value corresponding to the acquired digital signal is greater than or equal to a preset voltage value.
Optionally, the controller determines that the corresponding burnout detection result is unburnt when the voltage value corresponding to the acquired digital signal is smaller than a preset voltage value.
Based on the signal acquisition system, the controller controls the intermediate connection module to select different signal transmission channels through the processing module, establishes a plurality of signal transmission channels through the intermediate connection module, and does not need to be additionally provided with a plurality of mutually independent acquisition lines, compared with the mutually independent acquisition lines in the prior art, the device corresponding to each acquisition line is reduced, the hardware cost is saved, the occupied space is reduced, and the controller is used for switching the signal transmission channel by controlling the intermediate connection module and does not directly interact with the signal acquisition module, so that the controller does not interfere acquisition analog signals acquired by the signal acquisition module when the signal transmission channel is switched, and the acquisition precision of the acquisition analog signals is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of a signal acquisition system in one embodiment;
FIG. 2 is a schematic diagram of a signal acquisition system in one embodiment;
FIG. 3 is a schematic diagram of a signal acquisition system in one embodiment;
FIG. 4 is a schematic diagram of a signal acquisition system in one embodiment;
FIG. 5 is a schematic diagram of a signal acquisition system in one embodiment;
FIG. 6 is a schematic diagram of a signal acquisition system in one embodiment;
fig. 7 is a schematic structural diagram of a signal acquisition system in one embodiment.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In one embodiment, referring to fig. 1, there is provided a signal acquisition system, comprising in particular:
And the controller 110 is used for generating a corresponding control signal according to the received input instruction.
Specifically, the controller 110 may be any device or integrated circuit having a data signal control function. The input instruction is an instruction initiated by a user to the controller 110 through operating the control device, the input instruction is used for requesting to open the target transmission channel, the control device may specifically be a terminal or other devices capable of writing instructions into the controller 110, the controller 110 generates a corresponding control signal according to the input instruction, the control signal is a digital signal, the control signal is used for indicating the opening number of the target transmission channel, for example, the control signal is 100, and 100 is the opening number of the first transmission channel, so that the target transmission channel is determined to be the first transmission channel, and the control signal is used for opening the first transmission channel.
The processing module 120 is electrically connected to the controller 110, and is configured to convert the control signal into a register signal.
Specifically, the processing module 120 may be any device or integrated circuit with a signal processing function, where the processing module 120 is configured to perform expansion conversion on a control signal, that is, convert the control signal into a register signal corresponding to each second-order control line, where each register signal is configured to control one second-order control line, where the second-order control line is a line formed by connecting the processing module 120 and the intermediate connection module 130, as shown in fig. 2, the number of second-order control lines is the same as the number of signal transmission channels, and the control signal is transmitted to the processing module 120 through the first-order control lines, where the number of first-order control lines is smaller than the number of second-order control lines, and referring to the above example, the control signal is 100, where the first-order number corresponds to an enable signal, the second-order number corresponds to a first-order control line (AIN 0), and the third-order number corresponds to a second-order control line (AIN 1), that is, the number of first-order control lines corresponding to the control signal is 2, and the number of second-order control lines corresponding to the control signal transmission channels is equal to the number of signal transmission channels, for example, and the number of signal transmission channels is 4, and the number of control lines corresponding to the register signal is also corresponding to the control channels is converted to the control signal channel, and the control channel is expanded by the control channel is corresponding to the control channel.
The intermediate connection module 130 is electrically connected to the processing module 120, and establishes a plurality of signal transmission channels with the signal acquisition module 140, so as to open a target transmission channel according to the register signal, where the target transmission channel includes at least one signal transmission channel.
Specifically, the intermediate connection module 130 may be a device or an integrated circuit that provides multiple transmission ports, multiple control lines are established between the intermediate connection module 130 and the processing module 120, multiple signal transmission channels are established between the intermediate connection module 130 and the signal acquisition module 140, the multiple control lines between the intermediate connection module 130 and the processing module 120 are respectively in one-to-one correspondence with the signal transmission channels, the intermediate connection module 130 is configured to determine, according to a register signal, on-off states corresponding to the signal transmission channels, and mainly configured to update the on-off states of the target transmission channels to an on-state, that is, to open the target transmission channels, where the target transmission channels are configured to transmit, in the on-state, the acquired acquisition analog signals acquired by the signal acquisition module 140 to the intermediate connection module 130, and for a scenario requiring multiple different acquisition analog signals, the target transmission channels include multiple signal transmission channels, where each signal transmission channel is configured to transmit one acquisition analog signal in the on-state.
The signal acquisition module 140 is configured to acquire a plurality of different acquired analog signals, and transmit the acquired analog signals to the processing module 120 sequentially through the target transmission channel and the intermediate connection module 130, where each signal transmission channel is configured to transmit one acquired analog signal.
Specifically, the signal acquisition module 140 may be a temperature sensor, a thermocouple, other sensors or devices with detection functions, etc., where the signal acquisition module 140 is a temperature sensor in this embodiment, and is configured to sense an ambient temperature, that is, a plurality of different acquired analog signals include key signals for indicating the ambient temperature and other related signals, and each acquired analog signal is transmitted to the intermediate connection module 130 through a signal transmission channel.
Based on the signal acquisition system, the controller 110 controls the intermediate connection module 130 to select different signal transmission channels through the processing module 120, establishes multiple paths of signal transmission channels through the intermediate connection module 130, and does not need to add a plurality of mutually independent acquisition lines, compared with the mutually independent acquisition lines in the prior art, the device corresponding to each acquisition line is reduced, the hardware cost is saved, the occupied space is reduced, and the controller 110 performs switching of the signal transmission channels through controlling the intermediate connection module 130, and does not directly interact with the signal acquisition module 140, so that the controller 110 does not interfere with acquisition of analog signals by the signal acquisition module 140 when performing switching of the signal transmission channels, thereby improving the acquisition precision of the acquisition analog signals.
In one embodiment, the intermediate connection module 130 includes a multiplexer 1301, multiple input ends of the multiplexer 1301 are electrically connected to the signal acquisition module 140, and are used for establishing multiple signal transmission channels with the signal acquisition module 140, and output ends of the multiplexer 1301 are electrically connected to the processing module 120.
Specifically, each input end of the multiplexer 1301 is electrically connected with the signal output end of the signal acquisition module 140 to establish a plurality of signal transmission channels, and each signal output end of the multiplexer 1301 is electrically connected with each extension port (GPIO) of the processing module 120 to establish a second-order control line, as shown in fig. 3, the number of control lines between the multiplexer 1301 and the processing module 120 is equal to the number of signal transmission channels between the multiplexer 1301 and the signal acquisition module 140, so that the multiplexer 1301 receives the register signals transmitted by the processing module 120 through the control lines, and opens the signal transmission channels corresponding to the register signals to transmit the acquired analog signals output by the signal acquisition module 140 to the multiplexer 1301, that is, the controller 110 indirectly controls the multiplexer 1301, and the process of transmitting the acquired analog signals to the multiplexer 1301 through the signal transmission channels has no interaction effect, thereby avoiding the interference of the channel switching process on the acquired analog signals, and improving the accuracy of the acquired analog signals.
In one embodiment, the input end of the multiplexer 1301 includes a first input end and a second input end that are disposed in pairs, the first input end is electrically connected to the signal acquisition module 140 to form a first circuit, the second input end is electrically connected to the signal acquisition module 140 to form a second circuit, and the first circuit and the second circuit form one signal transmission channel.
Specifically, the multiple input ends of the multiplexer 1301 are all arranged in pairs, that is, the multiplexer includes multiple first input ends and second input ends matched in pairs, the signal acquisition module 140 is a temperature sensor, each first input end is electrically connected with a signal output end of the temperature sensor respectively, so as to establish multiple first lines, each second input end is electrically connected with a signal output end of the temperature sensor respectively, so as to establish multiple second lines, one first line and one second line are combined to form one signal transmission channel, that is, the signal transmission channel transmits an acquired analog signal in a differential manner through two lines, so that the signal to noise ratio of the signal acquisition system is improved, that is, the reliability of the acquired analog signal is improved. As shown in fig. 4, where 1A-nA is used to indicate a first, different line and 1B-nB is used to indicate a second, different line.
For example, in the case that the number of signal transmission channels is 4, the control strategy corresponding to the control signal is as follows:
| EN | AIN0 | AIN1 | Status of |
| 0 | / | / | All channels are closed |
| 1 | 0 | 0 | 1A and 1B line open |
| 1 | 0 | 1 | 2A and 2B line open |
| 1 | 1 | 0 | 3A and 3B line opening |
| 1 | 1 | 1 | 4A and 4B line opening |
The EN is used to indicate an enable signal, 1A, 2A, 3A, and 4A are respectively used to indicate a first line, 1B, 2B, 3B, and 4B are respectively used to indicate a second line, i.e., 1A and 1B are combined to form a first transmission channel, 2A and 2B are combined to form a second transmission channel, 3A and 3B are combined to form a third transmission channel, 4A and 4B are combined to form a fourth transmission channel, in the case that the enable signal is 0 in the control signal, the control signal is used to turn off all signal transmission channels, i.e., inhibit the acquired analog signal detected by the temperature sensor from being transmitted to the multiplexer 1301, in the case that the enable signal is 1, AIN0, AIN1 is 0, the control signal is used to turn on the first transmission channel, i.e., simultaneously turn on the 1A line and 1B, in the case that the enable signal is 1, AIN0 is 0, the AIN1 is 1, the control signal is used to turn on the second transmission channel, i.e., simultaneously turn on the 2A line and 2B, in the case that the enable signal is 1, AIN0 is 0, and the AIN1 is simultaneously turned on, and in the case that the enable signal is 1, the AIN0 is 3 is 1 is used to turn on the third transmission channel, i.e., the control signal is turned on the fourth signal is used to turn on the transmission channel.
Namely, each signal transmission channel has a corresponding switch control signal, and so on, under the condition that the number of the signal transmission channels is more, the number of the managed signal transmission channels is increased by adding the number of digital bits in the control signal, so that the on-off switching management of multiple channels is realized.
In one embodiment, the intermediate connection module 130 includes a first resistor and a second resistor, the first node on the first line is further electrically connected to the positive electrode of the analog signal source through the first resistor, and the second node on the second line is further electrically connected to the negative electrode of the analog signal source through the second electron.
Specifically, the first node on each first line is further required to be electrically connected with the positive electrode of the analog signal source through a first resistor, the first node can be any node on the first line, the second node on each second line is further required to be electrically connected with the negative electrode of the analog signal source through a second resistor, the second node can be any node on the second line, as shown in fig. 5, only a connection relation between the resistors on the 1A line and the 1B line is shown, wherein R1 is used for indicating the first resistor, R2 is used for indicating the second resistor, AVDD is used for indicating the positive electrode of the analog signal source, AVSS is used for indicating the negative electrode of the analog signal source, and referring to the connection relation between the 1A and 1B and the resistors, two lines in each signal transmission channel are connected with one resistor, the first resistor and the second resistor are the same in resistance value, and by setting two resistors with equal size on the two lines in the same signal transmission channel, the potential at the temperature sensor is zero, that is, the acquisition precision of the analog signal sensor is not affected by the acquisition potential of the temperature sensor is ensured.
In one embodiment, the processing module 120 includes a gain amplifier 1201, each expansion port of the gain amplifier 1201 is respectively connected to each signal output end of the multiplexer 1301, the number of expansion ports is the same as the number of control lines corresponding to the register signals, the signal transmission ends of the gain amplifier 1201 are electrically connected to the controller 110, the number of signal transmission ends is the same as the number of control lines corresponding to the control signals, the first power end of the gain amplifier 1201 is electrically connected to the positive electrode of the analog signal source, and the second power end of the gain amplifier 1201 is electrically connected to the negative electrode of the analog signal source.
Specifically, as shown in fig. 6, each expansion port of the gain amplifier 1201 is electrically connected to one signal output end of the multiplexer 1301, that is, the expansion port of the gain amplifier 1201 is connected to the signal output end of the multiplexer 1301 in a one-to-one correspondence manner, so as to form a plurality of control lines, and the control lines formed between the gain amplifier 1201 and the multiplexer 1301 are respectively in one-to-one correspondence with each signal transmission channel, that is, one control line between the gain amplifier 1201 and the multiplexer 1301 is used for transmitting a register signal for controlling the channel state corresponding to one signal transmission channel.
In one embodiment, the gain amplifier 1201 is further configured to convert the acquisition analog signal from the multiplexer 1301 to an acquisition digital signal and send the acquisition digital signal to the controller 110.
Specifically, in the above embodiment, it is proposed that the gain amplifier 1201 is configured to convert a control signal into a register signal with a larger number of corresponding control lines in a switching control flow of the controller 110 for a signal transmission channel, and in a transmission process of an acquisition analog signal, the gain amplifier 1201 is further configured to perform an analog-to-digital conversion process on the acquisition analog signal sent by the multiplexer 1301, thereby obtaining an acquisition digital signal, and send the converted acquisition digital signal to the controller 110, where the controller 110 can determine an ambient temperature according to the acquisition digital signal.
In one embodiment, the processing module 120 further includes an isolation chip 1202, a first end of the isolation chip 1202 is electrically connected to the gain amplifier 1201, and a second end of the isolation chip 1202 is electrically connected to the controller 110, for isolating the acquired digital signal from the gain amplifier 1201 from the acquired analog signal and transmitting only the acquired digital signal to the controller 110.
Specifically, as shown in fig. 7, an isolation chip 1202 is further connected between the gain amplifier 1201 and the controller 110, where the isolation chip 1202 is used to isolate the collected analog signal in the process of transmitting the collected digital signal, that is, only transmit the collected digital signal to the controller 110, that is, prevent the interference of the analog signal on the collected digital signal, further improve the accuracy of the collected digital signal obtained by the controller 110, and the isolation chip 1202 may be a chip with a model number NSiP8841W 1.
In one embodiment, the controller 110 is further configured to perform burnout detection according to the received acquired digital signal, so as to obtain a corresponding burnout detection result.
Specifically, under the condition that the controller 110 receives the collected digital signal, since the collected digital signal is used for indicating the ambient temperature, the collected digital signal can be used for performing burning detection, and when the burning phenomenon exists in components in the signal collection system, the ambient temperature of the signal collection system is higher than the burning point temperature of the common components, so that whether the signal collection system has the burning phenomenon or not can be judged according to the collected digital signal, and a corresponding burning detection result is obtained, namely, the burning detection result comprises burnt and unburnt products, the burnt products represent the burning phenomenon of the components in the signal collection system, and the unburnt products represent the normal running temperature of the components in the signal collection system and do not represent the burning phenomenon.
The controller 110 may further initiate a burnout alarm according to the burnout detection result, where the burnout alarm mode specifically includes a flashing light whistle prompt, a voice broadcast, a mail prompt, a short message prompt, a telephone prompt, a video prompt, etc., so as to prompt the user signal acquisition system to generate a burnout phenomenon of components, and timely take corresponding remedial measures to avoid more serious loss caused by further deterioration of the burnout phenomenon.
In one embodiment, the controller 110 determines that the corresponding burnout detection result is burnout if the voltage value corresponding to the acquired digital signal is greater than or equal to the preset voltage value.
Specifically, the controller 110 compares the received voltage value corresponding to the collected digital signal with a preset voltage value, where the preset voltage value is used to indicate the voltage value detected by the temperature sensor when the components are burned, specifically, the voltage value can be set in a self-defined manner according to the ignition temperature of each component in the signal collection system, and when the voltage value corresponding to the collected digital signal is greater than or equal to the preset voltage value, it indicates that the current environmental temperature of the signal collection system is higher than the normal temperature, that is, the component is burned, so that it is determined that the burning detection result is burned.
In one embodiment, the controller 110 determines that the corresponding burnout detection result is unburnt if the voltage value corresponding to the acquired digital signal is smaller than the preset voltage value.
Specifically, when the voltage value corresponding to the acquired digital signal is smaller than the preset voltage value, the signal acquisition system is indicated that the current environment temperature is normal, that is, the phenomenon of burning of components does not exist, and therefore the burning detection result is judged to be unburned.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, system, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, system, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, system, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
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| CN106656178A (en) * | 2016-12-29 | 2017-05-10 | 郑州云海信息技术有限公司 | Signal processing device, system and method |
| CN113922821B (en) * | 2021-09-28 | 2024-03-01 | 中国电子科技集团公司第二十四研究所 | Hybrid multichannel time-sharing telemetry acquisition circuit and telemetry device |
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