CN114211927B - Solenoid valve control method, device, equipment and storage medium based on air suspension - Google Patents

Abstract

The invention relates to the field of electrical control technology and discloses a solenoid valve control method, device, equipment and storage medium based on air suspension. The method includes: obtaining the air spring under load state based on the current altitude and altitude pressure characteristic information. Target pressure information; the amount of gas to be charged and discharged is generated through the flow characteristic information of the air spring, the target pressure information and the target height; the target PWM control signal is generated according to the flow characteristic information of the solenoid valve and the amount of gas to be charged and discharged; because the present invention uses air The flow characteristic information of the spring, the target pressure information and the target height generate the amount of gas to be filled and discharged, and then the target PWM control signal generated based on the flow characteristic information of the solenoid valve and the amount of gas to be filled and discharged is used to control the solenoid valve. Compared with the existing technology, System status control solenoid valve can effectively improve the efficiency and accuracy of controlling the solenoid valve, thereby providing predictive support for "overcharge", "overdischarge" and frequent charging and deflation phenomena.

Description

Solenoid valve control method, device, equipment and storage medium based on air suspension

Technical field

The present invention relates to the field of electrical control technology, and in particular to a solenoid valve control method, device, equipment and storage medium based on air suspension.

Background technique

At present, large commercial vehicles, luxury passenger cars and other models are often equipped with electronically controlled air suspension systems, and the air spring is inflated and deflated through solenoid valves to control the vehicle height during operation. However, the existing method of controlling solenoid valves often The real-time altitude signal is transmitted to the Electronic Control Unit (ECU), allowing the ECU to compare the current altitude with the target altitude, and control the solenoid valve to inflate and deflate based on the height difference. However, the duty cycle of the solenoid valve depends on The height difference, the above method lacks prediction of the inflation amount, and thus cannot predict the control action. Due to the influence of calculation speed and response speed, calculation and control lag behind status recognition, after the time when an action should start or stop. This action will only start or stop, resulting in overcharge, overdischarge, frequent charging and deflation, and other undesirable phenomena, resulting in low efficiency and low accuracy of the final control solenoid valve.

The above content is only used to assist in understanding the technical solution of the present invention, and does not represent an admission that the above content is prior art.

Contents of the invention

The main purpose of the present invention is to provide a solenoid valve control method, device, equipment and storage medium based on air suspension, aiming to solve the problem of low efficiency and accuracy of controlling the solenoid valve in the existing technology, and the inability to "overcharge" , "over-discharge" and frequent charging and deflating phenomena to provide technical issues with predictive support.

In order to achieve the above object, the present invention provides a solenoid valve control method based on air suspension. The solenoid valve control method based on air suspension includes the following steps:

Determine the load state of the air spring based on the current altitude and current air pressure information;

Obtain the target pressure information of the air spring under the load state according to the current height and height pressure characteristic information;

The amount of gas to be charged and discharged is generated based on the flow characteristic information, target pressure information and target height of the air spring;

A target PWM control signal is generated based on the flow characteristic information of the solenoid valve and the amount of gas to be charged and discharged, and the solenoid valve is controlled based on the target PWM control signal.

Optionally, determining the load state of the air spring based on the current height and current air pressure information includes:

Construct the corresponding flow-pressure-height model based on the flow characteristic information of the air spring;

Construct the corresponding flow-pressure-duty cycle model based on the flow characteristic information of the solenoid valve;

The current height and current air pressure information are calculated through the flow-pressure-height model and the flow-pressure-duty cycle model to obtain the load state of the air spring.

Optionally, obtaining the target pressure information of the air spring in the load state based on the current height and the target height includes:

Calculate the current altitude through altitude pressure characteristic information to obtain current pressure information;

Obtain the corresponding internal pressure set according to the altitude pressure characteristic information;

The current pressure information and the internal pressure set are linearly interpolated to obtain the target pressure information of the air spring under the load state.

Optionally, generating the gas volume to be filled and deflated through the flow characteristic information, target pressure information and target height of the air spring includes:

Calculate the difference between the current altitude and the target altitude to obtain the corresponding altitude change value;

Determine the flow required for lifting unit height according to the flow characteristic information of the air spring;

Through the target cycle calculation strategy and the target pressure information, the height change value and the flow rate required for lifting unit height are accumulated and calculated to obtain the amount of gas to be filled and discharged.

Optionally, generating a target PWM control signal based on the flow characteristic information of the solenoid valve and the amount of gas to be filled and discharged, and controlling the solenoid valve based on the target PWM control signal includes:

Calculate the amount of gas to be charged and discharged based on the flow characteristic information of the solenoid valve to obtain the current filling and deflating air ratio and the current cycle number;

A target PWM control signal is generated based on the current charging and deflating air duty ratio and the current cycle number, and the solenoid valve is controlled based on the target PWM control signal.

Optionally, the amount of gas to be charged and discharged is calculated based on the flow characteristic information of the solenoid valve to obtain the current charging and discharging air duty ratio and the current cycle number, including:

Obtain the target duty cycle set of the solenoid valve;

Calculate the target duty cycle set according to the flow characteristic information of the solenoid valve to obtain the corresponding flow set;

Compare the flow rate in the flow set with the amount of gas to be charged and discharged to obtain the corresponding duty cycle amount;

Based on the comparison between the duty cycle number and the preset control time, the current charging and deflating air duty cycle and the current cycle number are obtained.

Optionally, generating a target PWM control signal through the current charging and deflating duty ratio and the current cycle number, and controlling the solenoid valve based on the target PWM control signal includes:

Obtain the current single cycle number, and obtain the corresponding cycle length according to the current single cycle number and the current cycle number;

Obtain the corresponding starting period and ending period according to the current period number;

Generate a target PWM control signal according to the current charging and deflating duty ratio, cycle length, starting period and ending period;

When the target PWM control signal is the target PWM opening signal, control the channel of the solenoid valve to open;

When the target PWM control signal is the target PWM closing signal, the channel of the solenoid valve is controlled to be closed.

In addition, to achieve the above object, the present invention also proposes a solenoid valve control device based on air suspension. The solenoid valve control device based on air suspension includes:

A determination module used to determine the load state of the air spring based on the current altitude and current air pressure information;

An acquisition module configured to obtain the target pressure information of the air spring in the load state based on the current height and height pressure characteristic information;

A generation module used to generate the amount of gas to be charged and discharged based on the flow characteristic information, target pressure information and target height of the air spring;

A control module configured to generate a target PWM control signal based on the flow characteristic information of the solenoid valve and the amount of gas to be filled and discharged, and to control the solenoid valve based on the target PWM control signal.

In addition, to achieve the above object, the present invention also proposes an air suspension-based solenoid valve control device. The air suspension-based solenoid valve control device includes: a memory, a processor, and a device stored in the memory and available in the memory. An air suspension-based solenoid valve control program running on the processor, the air suspension-based solenoid valve control program is configured to implement the air suspension-based solenoid valve control method as described above.

In addition, to achieve the above object, the present invention also proposes a storage medium on which a solenoid valve control program based on air suspension is stored. The solenoid valve control program based on air suspension is implemented when executed by a processor. The solenoid valve control method based on air suspension is as described above.

The solenoid valve control method based on air suspension proposed by the present invention determines the load state of the air spring based on the current height and current air pressure information; and obtains the load state of the air spring based on the current height and height pressure characteristic information. The target pressure information under the air spring; the gas volume to be charged and discharged is generated through the flow characteristic information of the air spring, the target pressure information and the target height; the target PWM control signal is generated according to the flow characteristic information of the solenoid valve and the gas volume to be charged and discharged, And the solenoid valve is controlled based on the target PWM control signal; because the present invention generates the amount of gas to be filled and discharged through the flow characteristic information of the air spring, the target pressure information and the target height, and then based on the flow characteristic information of the solenoid valve, The target PWM control signal generated by the amount of gas to be charged and discharged controls the solenoid valve. Compared with the existing technology of controlling the solenoid valve through the system status, it can effectively improve the efficiency and accuracy of controlling the solenoid valve, thereby providing "overcharge" and "overdischarge". ” and frequent inflation and deflation phenomena provide prediction support.

Description of the drawings

Figure 1 is a schematic structural diagram of an air suspension-based solenoid valve control device in the hardware operating environment involved in the embodiment of the present invention;

Figure 2 is a schematic flow chart of the first embodiment of the solenoid valve control method based on air suspension according to the present invention;

Figure 3 is an overall flow diagram of an embodiment of the solenoid valve control method based on air suspension according to the present invention;

Figure 4 is a schematic flow chart of the second embodiment of the solenoid valve control method based on air suspension according to the present invention;

Figure 5 is an inflation schematic diagram of an embodiment of the solenoid valve control method based on air suspension according to the present invention;

Figure 6 is a schematic flow chart of the third embodiment of the solenoid valve control method based on air suspension according to the present invention;

Figure 7 is a schematic diagram of the flow rate change process of an embodiment of the solenoid valve control method based on air suspension according to the present invention;

Figure 8 is a functional module schematic diagram of the first embodiment of the solenoid valve control device based on air suspension of the present invention.

The realization of the purpose, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

Referring to Figure 1, Figure 1 is a schematic structural diagram of an air suspension-based solenoid valve control device in the hardware operating environment involved in the embodiment of the present invention.

As shown in Figure 1, the air suspension-based solenoid valve control device may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize connection communication between these components. The user interface 1003 may include a display screen (Display) and an input unit such as a keyboard (Keyboard). The optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may optionally be a storage device independent of the aforementioned processor 1001.

Those skilled in the art can understand that the structure shown in Figure 1 does not constitute a limitation to the solenoid valve control device based on air suspension, and may include more or less components than shown in the figure, or combine certain components, or Different component arrangements.

As shown in FIG. 1 , memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and an air suspension-based solenoid valve control program.

In the air suspension-based solenoid valve control device shown in Figure 1, the network interface 1004 is mainly used for data communication with the network integration platform workstation; the user interface 1003 is mainly used for data interaction with the user; the present invention is based on the air suspension The processor 1001 and the memory 1005 in the solenoid valve control device of the frame can be set in the solenoid valve control device based on air suspension. The solenoid valve control device based on air suspension calls the solenoid valve control device based on air suspension through the processor 1001 and the memory 1005. The solenoid valve control program of the air suspension is executed, and the solenoid valve control method based on the air suspension provided by the embodiment of the present invention is executed.

Based on the above hardware structure, an embodiment of the solenoid valve control method based on air suspension of the present invention is proposed.

Referring to Figure 2, Figure 2 is a schematic flow chart of the first embodiment of the solenoid valve control method based on air suspension of the present invention.

In a first embodiment, the air suspension-based solenoid valve control method includes the following steps:

Step S10: Determine the load state of the air spring based on the current height and current air pressure information.

It should be noted that the execution subject of this embodiment is a solenoid valve control device based on air suspension, and may also be other devices that can achieve the same or similar functions, such as a solenoid valve controller, etc. This embodiment does not limit this. In this embodiment, the solenoid valve controller is taken as an example for explanation.

It should be understood that the current height refers to the current height of the air spring, and the current air pressure information refers to the gas pressure information that the air spring bears at the current height. The current air pressure information includes information such as air pressure magnitude and air pressure direction.

It can be understood that the load state refers to the load state of the air spring under the current height and current air pressure information. The load state can reflect the load situation of the air spring. After obtaining the current height and current air pressure information, through Models of air springs and solenoid valves detect the load status of the air spring under current conditions.

Further, step S10 includes: constructing a corresponding flow-pressure-height model according to the flow characteristic information of the air spring; constructing a corresponding flow-pressure-duty cycle model according to the flow characteristic information of the solenoid valve; using the flow-pressure-height model The model and the flow-pressure-duty cycle model calculate the current height and current air pressure information to obtain the load state of the air spring.

It should be understood that the flow-pressure-height model refers to the model constructed from the mapping relationship between the flow, pressure and height of the air spring, and the flow characteristic information of the air spring includes: the density of the air, the air passing through the air spring mass, air spring orifice area, air spring orifice flow coefficient and the change in pressure between the additional air chamber and the air spring, while the flow-pressure-duty cycle model refers to the flow, pressure and A model constructed based on the mapping relationship between duty cycles.

It can be understood that after constructing the flow-pressure-height model and the flow-pressure-duty cycle model, the current height and current air pressure of the air spring can be calculated through the flow-pressure-height model and the flow-pressure-duty cycle model. Calculations are performed to obtain the load state of the air spring under current conditions, which corresponds to the current height.

Step S20: Obtain the target pressure information of the air spring in the load state according to the current height and the target height.

It can be understood that the target height refers to the height of the air spring after being adjusted, and the target pressure information refers to the pressure information experienced under the target height and load state, that is, the air spring is under the same load and different heights. The internal pressure endured, the change in internal pressure caused by the height change under the load conditions corresponding to different internal pressures.

Further, step S20 includes: calculating the current altitude through altitude pressure characteristic information to obtain current pressure information; obtaining a corresponding internal pressure set according to the altitude pressure characteristic information; and combining the current pressure information and internal pressure set. Linear interpolation is performed to obtain the target pressure information of the air spring under the load state.

It should be understood that the current pressure information refers to the pressure information that the air spring bears under the current height and load state, and the height pressure characteristic information refers to the characteristic information between the design height and pressure of the air spring. When the height is known, When any condition in the pressure characteristic information is met, another condition can be found. For example, if the known condition is the current altitude, then the other condition found is the pressure corresponding to the current altitude, and the corresponding pressure information can be obtained through this pressure. , Similarly, the internal pressure set corresponding to the design height is found through the height pressure characteristic information, that is, the design height has multiple internal pressures corresponding to different standards.

It can be understood that after obtaining the current pressure information and the internal pressure set, linear interpolation is performed between the current pressure information and each internal pressure in the internal pressure set to obtain the target pressure of the air spring under the condition that the load state remains unchanged. Target pressure information experienced at altitude.

Step S30: Generate the gas volume to be filled and discharged based on the flow characteristic information, target pressure information and target height of the air spring.

It should be understood that the amount of gas to be filled or deflated refers to the volume that the solenoid valve needs to inflate or deflate. That is, when the current height is less than the target height, the solenoid valve needs to be controlled to inflate. When the current height is greater than the target height, the solenoid valve needs to be controlled. The valve is deflated, and the volume that controls the solenoid valve to be inflated or deflated is determined through flow characteristic information, target pressure information, and target height.

Step S40: Generate a target PWM control signal based on the flow characteristic information of the solenoid valve and the amount of gas to be charged and discharged, and control the solenoid valve based on the target PWM control signal.

It can be understood that the flow characteristic information of the solenoid valve refers to the characteristic curve between the outlet pressure and the outlet flow of the solenoid valve under a certain inlet pressure. The target PWM control signal refers to the signal that controls the solenoid valve to open or close. After obtaining the amount of gas to be charged and discharged, a target PWM control signal is generated based on the flow characteristic information of the solenoid valve and the amount of gas to be charged and discharged, and then the closing of the solenoid valve is controlled through the PWM control signal.

It should be understood that, with reference to Figure 3, Figure 3 is a schematic diagram of the overall process. The specific process is: obtain the current height and current high pressure information of the air spring, and obtain the equal load change based on the current height, current high pressure information and air spring design height pressure characteristic information. The target pressure information of the target height is calculated, and then the required gas volume to be charged and discharged is generated based on the target pressure information, the flow characteristic information of the air spring and the target height, and then based on the required gas volume to be charged and discharged and the flow characteristic information of the solenoid valve The corresponding duty cycle and number of cycles are obtained, and finally the target PWM control signal is generated through the duty cycle and number of cycles.

This embodiment determines the load state of the air spring based on the current height and current air pressure information; obtains the target pressure information of the air spring under the load state based on the current height and height pressure characteristic information; through the air spring The flow characteristic information, the target pressure information and the target height generate the gas volume to be charged and discharged; the target PWM control signal is generated based on the flow characteristic information of the solenoid valve and the gas volume to be filled and discharged, and the target PWM control signal is generated based on the target PWM control signal. The solenoid valve is controlled; since this embodiment generates the amount of gas to be filled and discharged through the flow characteristic information of the air spring, the target pressure information and the target height, and then generates the target PWM control based on the flow characteristic information of the solenoid valve and the amount of gas to be filled and discharged. Compared with the existing technology of controlling the solenoid valve through system status, the signal control solenoid valve can effectively improve the efficiency and accuracy of controlling the solenoid valve, thereby providing predictive support for "overcharge", "overdischarge" and frequent charging and deflation phenomena. .

In one embodiment, as shown in Figure 4, a second embodiment of the air suspension-based solenoid valve control method of the present invention is proposed based on the first embodiment. The step S30 includes:

Step S301: Perform a difference calculation between the current height and the target height to obtain the corresponding height change value.

It should be understood that the height change value refers to the value of the height change of the air spring when it is adjusted from the current height to the target height. The height change value is obtained by the difference between the current height and the target height. For example, the height change value of the air spring is The current height is L1, and the adjusted target height is L2, then the height change amount △L=|L1-L2|.

Step S302: Determine the flow rate required to lift the unit height according to the flow characteristic information of the air spring.

It can be understood that the flow rate refers to the flow rate required when the air spring rises or falls by one unit height under different loads. When the current height is less than the target height, the flow rate is the flow rate required when it rises by one unit height. At the current When the height is greater than the target height, the flow rate is the flow rate required to drop one unit height, and the unit height can be 1mm.

Step S303: The height change value and the flow rate required for lifting the unit height are accumulated and calculated through the target cycle calculation strategy and the target pressure information to obtain the amount of gas to be filled and deflated.

It should be understood that the target cycle calculation strategy refers to the strategy of cyclically calculating the amount of gas filling and discharging. After obtaining the flow rate required for lifting unit height, the height change value and the flow rate required for lifting unit height are accumulated to calculate the flow rate from the current height to The total flow value required for the target height is then used to obtain the amount of gas to be filled and discharged. For example, the flow required to drop or rise one unit height is m, and there are n units to rise or fall from the current height to the target height. height, the number of solenoid valves is p, then the total flow value is m*n*p.

It can be understood that, with reference to Figure 5, Figure 5 is a schematic diagram of inflation, specifically: the amount of inflation required for the air spring to lift 1mm under different loads and different heights. Different loads are reflected by pressure, and the lifting height is It is determined by the current height and target height of the air spring, and the parameter of the vertical coordinate is the amount of inflation required to lift 1mm.

In this embodiment, the corresponding height change value is obtained by performing a difference calculation between the current height and the target height; the flow rate required for lifting the unit height is determined based on the flow characteristic information of the air spring; the target cycle calculation strategy and the target pressure information are used to calculate The height change value and the flow rate required for lifting unit height are cumulatively calculated to obtain the amount of gas to be filled and discharged; since this embodiment is calculated by making a difference between the current height and the target height, and then determined based on the flow characteristic information of the air spring The flow rate required to lift the unit height is then accumulated and calculated through the target cycle calculation strategy to calculate the height change value and the flow rate required to lift the unit height, thereby effectively improving the accuracy of obtaining the amount of gas to be filled and discharged.

In one embodiment, as shown in Figure 6, a third embodiment of the air suspension-based solenoid valve control method of the present invention is proposed based on the first embodiment. The step S40 includes:

Step S401: Calculate the amount of gas to be charged and deflated based on the flow characteristic information of the solenoid valve to obtain the current filling and deflating air ratio and the current cycle number.

It can be understood that the current filling and deflating air ratio refers to the ratio between the filling or deflating time and the total time, and the current cycle number refers to the number of filling or deflating cycles. After obtaining the amount of gas to be filled and deflated, , calculate the amount of gas to be charged and discharged through the flow characteristic information of the solenoid valve to obtain the corresponding current filling and discharge air ratio and current cycle number.

Further, step S401 includes: obtaining a target duty cycle set of the solenoid valve; calculating the target duty cycle set according to the flow characteristic information of the solenoid valve to obtain a corresponding flow rate set; converting the flow rate The flow rate in the set is compared with the amount of gas to be charged and discharged to obtain the corresponding duty cycle number; the current charge and discharge air duty ratio and the current cycle number are obtained by comparing the duty cycle number and the preset control time.

It should be understood that the target duty cycle set refers to a set composed of common duty cycles of the solenoid valve. For example, when the solenoid valve is inflated, the duty cycles are 40%, 60% and 80%. At this time, the solenoid valve The front and rear ends of the valve are the air source and the air spring. When the solenoid valve is deflating, the duty cycle is 60%, 80% and 100%. At this time, the front and rear ends of the solenoid valve are the air spring and the atmosphere.

It can be understood that the flow set refers to the set of flows corresponding to the duty cycle, and the preset control time refers to the time required to control the solenoid valve. After the target duty cycle set is obtained, the solenoid valve The flow characteristic information calculates the target duty cycle set to obtain the corresponding flow rate set, and then ratios the flow rate in the flow set to the amount of gas to be charged and discharged to obtain the duty cycle quantity, and then sums the duty cycle quantity and When comparing the preset control times, the cycle number is rounded to obtain the most accurate current charging and deflating air ratio and current cycle number.

Step S402: Generate a target PWM control signal based on the current charging and deflating duty ratio and the current cycle number, and control the solenoid valve based on the target PWM control signal.

It should be understood that, after obtaining the current charging and deflating duty ratio and the current cycle number, the corresponding target PWM control signal is generated according to the current charging and deflating duty ratio and the current cycle number, and the target PWM control signal is the target PWM start signal. When the target PWM opening signal is the target PWM closing signal, the channel controlling the solenoid valve is closed.

Further, step S402 includes: obtaining the current single cycle number, obtaining the corresponding cycle length according to the current single cycle number and the current cycle number; obtaining the corresponding start cycle and end cycle according to the current cycle number; The current charging and deflating duty ratio, cycle length, starting period and ending period generate a target PWM control signal; when the target PWM control signal is a target PWM opening signal, the channel of the solenoid valve is controlled to open; when the target When the PWM control signal is the target PWM closing signal, the channel of the solenoid valve is controlled to be closed.

It can be understood that the cycle length refers to the length of the continuous cycle of the control solenoid valve. For example, if the single cycle number is A and the current cycle number is B, then the cycle length is B/A, and the starting cycle refers to the current cycle number. The starting cycle, similarly, the ending cycle refers to the cycle ending in the current cycle number. The setting time of the PWM control signal is calculated through the current charging and deflating duty ratio and cycle length, that is, the target PWM control signal is between the starting cycle and the current period. The signal is set as the target PWM turn-on signal by charging and deflating air duty ratio * cycle length, that is, the target PWM turn-on signal is "0", and the signal is set as the target PWM off signal from the current charging and deflating air duty ratio * cycle length to the end period. , that is, the target PWM off signal is "1".

It should be understood that after obtaining the target PWM control signal, it is determined whether the target PWM control signal is the target PWM on signal. If so, the channel of the solenoid valve is controlled to be opened. If it is determined that the target PWM control signal is the target PWM off signal, the solenoid valve is controlled. The valve channel is closed, and the main valve is controlled to be inflated or deflated.

It can be understood that, with reference to Figure 7, Figure 7 is a schematic diagram of the flow change process, specifically: the flow rate of a single cycle of the channel changes with changes in pressure difference and duty cycle, that is, any parameter in the pressure difference or duty cycle changes. When the flow rate changes, the flow rate will also change. Figure 7 can reflect the overall change in flow rate, including three parameters, namely duty cycle, single-cycle flow rate and pressure difference. For example, as the duty cycle decreases As the pressure difference increases, the single-cycle flow rate also increases.

This embodiment calculates the amount of gas to be charged and discharged based on the flow characteristic information of the solenoid valve to obtain the current filling and deflating air duty ratio and the current cycle number; a target is generated based on the current filling and deflating air duty ratio and the current cycle number. PWM control signal, and controls the solenoid valve based on the target PWM control signal; since this embodiment calculates the amount of gas to be filled and discharged through the flow characteristic information of the solenoid valve, and then calculates the amount of gas to be filled and discharged according to the current filling and discharge air ratio and the current The number of cycles generates a target PWM control signal, and then the target PWM control signal is used to control the opening and closing of the solenoid valve, thereby effectively improving the accuracy of the solenoid valve.

In addition, embodiments of the present invention also provide a storage medium on which a solenoid valve control program based on air suspension is stored. When the solenoid valve control program based on air suspension is executed by a processor, the solenoid valve control program based on air suspension is implemented as described above. The steps of the solenoid valve control method based on air suspension.

Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described again here.

In addition, referring to Figure 8, an embodiment of the present invention also proposes an air suspension-based solenoid valve control device. The air suspension-based solenoid valve control device includes:

The determination module 10 is used to determine the load state of the air spring according to the current altitude and current air pressure information.

The acquisition module 20 is configured to obtain the target pressure information of the air spring in the load state according to the current height and height pressure characteristic information.

The generation module 30 is used to generate the amount of gas to be filled and discharged based on the flow characteristic information, target pressure information and target height of the air spring.

The control module 40 is configured to generate a target PWM control signal based on the flow characteristic information of the solenoid valve and the amount of gas to be filled and discharged, and to control the solenoid valve based on the target PWM control signal.

This embodiment determines the load state of the air spring based on the current height and current air pressure information; obtains the target pressure information of the air spring under the load state based on the current height and height pressure characteristic information; through the air spring The flow characteristic information, the target pressure information and the target height generate the gas volume to be charged and discharged; the target PWM control signal is generated based on the flow characteristic information of the solenoid valve and the gas volume to be filled and discharged, and the target PWM control signal is generated based on the target PWM control signal. The solenoid valve is controlled; since this embodiment generates the amount of gas to be filled and discharged through the flow characteristic information of the air spring, the target pressure information and the target height, and then generates the target PWM control based on the flow characteristic information of the solenoid valve and the amount of gas to be filled and discharged. Compared with the existing technology of controlling the solenoid valve through system status, the signal control solenoid valve can effectively improve the efficiency and accuracy of controlling the solenoid valve, thereby providing predictive support for "overcharge", "overdischarge" and frequent charging and deflation phenomena. .

It should be noted that the workflow described above is only illustrative and does not limit the scope of the present invention. In practical applications, those skilled in the art can select some or all of them for implementation according to actual needs. The purpose of this embodiment is not limited here.

In addition, for technical details that are not described in detail in this embodiment, please refer to the solenoid valve control method based on air suspension provided by any embodiment of the present invention, and will not be described again here.

In one embodiment, the determination module 10 is also used to construct a corresponding flow-pressure-height model according to the flow characteristic information of the air spring; and to construct a corresponding flow-pressure-duty cycle model according to the flow characteristic information of the solenoid valve. ; Calculate the current height and current air pressure information through the flow-pressure-height model and the flow-pressure-duty cycle model to obtain the load state of the air spring.

In one embodiment, the acquisition module 20 is also used to calculate the current altitude based on the altitude pressure characteristic information to obtain the current pressure information; obtain the corresponding internal pressure set according to the altitude pressure characteristic information; and convert the The current pressure information and the internal pressure set are linearly interpolated to obtain the target pressure information of the air spring under the load state.

In one embodiment, the generation module 30 is also used to calculate the difference between the current height and the target height to obtain the corresponding height change value; and determine the flow rate required for lifting the unit height according to the flow characteristic information of the air spring. ; Through the target cycle calculation strategy and the target pressure information, the height change value and the flow rate required for lifting unit height are accumulated and calculated to obtain the amount of gas to be charged and discharged.

In one embodiment, the control module 40 is also used to calculate the amount of gas to be filled and deflated based on the flow characteristic information of the solenoid valve to obtain the current filling and deflating air duty ratio and the current cycle number; The charging and deflating duty ratio and the current cycle number generate a target PWM control signal, and the solenoid valve is controlled based on the target PWM control signal.

In one embodiment, the control module 40 is also used to obtain a target duty cycle set of the solenoid valve; calculate the target duty cycle set according to the flow characteristic information of the solenoid valve to obtain the corresponding Flow rate set; compare the flow rate in the flow set with the amount of gas to be charged and discharged to obtain the corresponding duty cycle number; compare the duty cycle number with the preset control time to obtain the current filling and deflating air volume ratio and the current period number.

In one embodiment, the control module 40 is also used to obtain the current single cycle number, obtain the corresponding cycle length according to the current single cycle number and the current cycle number, and obtain the corresponding starting cycle according to the current cycle number. and the end cycle; generate a target PWM control signal according to the current charging and deflating duty cycle, cycle length, starting cycle and ending cycle; when the target PWM control signal is a target PWM start signal, control the solenoid valve The channel is open; when the target PWM control signal is the target PWM close signal, the channel of the solenoid valve is controlled to be closed.

For other embodiments of the air suspension-based solenoid valve control device of the present invention or implementation methods, please refer to the above method embodiments, which are not redundant here.

Furthermore, it should be noted that, as used herein, the terms "include", "comprises" or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or system that includes a list of elements includes not only those elements, but also other elements not expressly listed or elements inherent to the process, method, article or system. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

The above serial numbers of the embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments.

Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product that is essentially or contributes to the existing technology. The computer software product is stored in a storage medium (such as a read-only memory). , ROM)/RAM, magnetic disk, optical disk), including a number of instructions to cause a terminal device (which can be a mobile phone, a computer, an integrated platform workstation, or a network device, etc.) to execute the methods described in various embodiments of the present invention. .

The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the description and drawings of the present invention may be directly or indirectly used in other related technical fields. , are all similarly included in the scope of patent protection of the present invention.

Claims (7)

1. A solenoid valve control method based on air suspension, characterized in that the solenoid valve control method based on air suspension includes the following steps: Determine the load state of the air spring based on the current altitude and current air pressure information; Obtain the target pressure information of the air spring under the load state according to the current height and height pressure characteristic information; The amount of gas to be charged and discharged is generated based on the flow characteristic information, target pressure information and target height of the air spring; Generate a target PWM control signal based on the flow characteristic information of the solenoid valve and the amount of gas to be charged and discharged, and control the solenoid valve based on the target PWM control signal; Determining the load state of the air spring based on the current height and current air pressure information includes: Construct the corresponding flow-pressure-height model based on the flow characteristic information of the air spring; Construct the corresponding flow-pressure-duty cycle model based on the flow characteristic information of the solenoid valve; Calculate the current height and current air pressure information through the flow-pressure-height model and the flow-pressure-duty cycle model to obtain the load state of the air spring; Obtaining the target pressure information of the air spring in the load state based on the current height and height pressure characteristic information includes: Calculate the current altitude through altitude pressure characteristic information to obtain current pressure information; Obtain the corresponding internal pressure set according to the altitude pressure characteristic information; Linearly interpolate the current pressure information and the internal pressure set to obtain the target pressure information of the air spring under the load state; The amount of gas to be filled and discharged is generated through the flow characteristic information, target pressure information and target height of the air spring, including: Calculate the difference between the current altitude and the target altitude to obtain the corresponding altitude change value; Determine the flow required for lifting unit height according to the flow characteristic information of the air spring; Through the target cycle calculation strategy and the target pressure information, the height change value and the flow rate required for lifting unit height are accumulated and calculated to obtain the amount of gas to be filled and discharged. 2. The solenoid valve control method based on air suspension according to claim 1, characterized in that the target PWM control signal is generated according to the flow characteristic information of the solenoid valve and the amount of gas to be filled and discharged, and based on the The target PWM control signal controls the solenoid valve, including: Calculate the amount of gas to be charged and discharged based on the flow characteristic information of the solenoid valve to obtain the current filling and deflating air ratio and the current cycle number; A target PWM control signal is generated based on the current charging and deflating air duty ratio and the current cycle number, and the solenoid valve is controlled based on the target PWM control signal. 3. The solenoid valve control method based on air suspension according to claim 2, characterized in that the current charging and deflating air occupancy is obtained by calculating the amount of gas to be filled and deflated according to the flow characteristic information of the solenoid valve. Ratio and current period number, including: Obtain the target duty cycle set of the solenoid valve; Calculate the target duty cycle set according to the flow characteristic information of the solenoid valve to obtain the corresponding flow set; Compare the flow rate in the flow set with the amount of gas to be charged and discharged to obtain the corresponding duty cycle number; Based on the comparison between the duty cycle number and the preset control time, the current charging and deflating air duty cycle and the current cycle number are obtained. 4. The solenoid valve control method based on air suspension according to claim 2, characterized in that the target PWM control signal is generated by the current charging and deflating duty ratio and the current cycle number, and the target PWM control signal is generated based on the target The PWM control signal controls the solenoid valve, including: Obtain the current single cycle number, and obtain the corresponding cycle length according to the current single cycle number and the current cycle number; Obtain the corresponding starting period and ending period according to the current period number; Generate a target PWM control signal according to the current charging and deflating duty ratio, cycle length, starting period and ending period; When the target PWM control signal is the target PWM opening signal, control the channel of the solenoid valve to open; When the target PWM control signal is the target PWM closing signal, the channel of the solenoid valve is controlled to be closed. 5. A solenoid valve control device based on air suspension, characterized in that the solenoid valve control device based on air suspension includes: A determination module used to determine the load state of the air spring based on the current height and current air pressure information; An acquisition module configured to obtain the target pressure information of the air spring in the load state based on the current height and height pressure characteristic information; A generation module used to generate the amount of gas to be charged and discharged based on the flow characteristic information, target pressure information and target height of the air spring; A control module configured to generate a target PWM control signal based on the flow characteristic information of the solenoid valve and the amount of gas to be filled and discharged, and to control the solenoid valve based on the target PWM control signal; The determination module is also used to construct a corresponding flow-pressure-height model according to the flow characteristic information of the air spring; to construct a corresponding flow-pressure-duty cycle model according to the flow characteristic information of the solenoid valve; through the flow-pressure-height The model and the flow-pressure-duty cycle model calculate the current height and current air pressure information to obtain the load state of the air spring; The acquisition module is also used to calculate the current altitude through altitude pressure characteristic information to obtain current pressure information; obtain a corresponding internal pressure set according to the altitude pressure characteristic information; and combine the current pressure information and internal pressure set Perform linear interpolation to obtain the target pressure information of the air spring under the load state; The generation module is also used to calculate the difference between the current height and the target height to obtain the corresponding height change value; determine the flow rate required for lifting unit height according to the flow characteristic information of the air spring; calculate the strategy through the target cycle and The target pressure information accumulates and calculates the height change value and the flow rate required for lifting unit height to obtain the amount of gas to be filled and discharged. 6. An air suspension-based solenoid valve control device, characterized in that the air suspension-based solenoid valve control device includes: a memory, a processor, and a device stored on the memory and available on the processor. A running air suspension-based solenoid valve control program configured to implement the air suspension-based solenoid valve control method according to any one of claims 1 to 4. 7. A storage medium, characterized in that an air suspension-based solenoid valve control program is stored on the storage medium, and when the air suspension-based solenoid valve control program is executed by a processor, it implements claims 1 to 1 The solenoid valve control method based on air suspension according to any one of 4.