Air pressure detection method, air compressor inflation method, system and vehicle

Abstract

The present invention provides an air pressure detection method, an air compressor inflation method, a system and a vehicle, wherein the air pressure detection method comprises: obtaining the power supply voltage and output voltage of the air pressure sensor; determining the first voltage threshold and the second voltage threshold based on the power supply voltage, judging whether the output voltage is less than or equal to the first voltage threshold, and whether the output voltage is greater than or equal to the second voltage threshold; when the output voltage is greater than the first voltage threshold and less than the second voltage threshold, determining the air pressure value of the component to be tested based on the pre-constructed air pressure conversion relationship, the output voltage and the power supply voltage, and displaying the air pressure value on the instrument; when the output voltage is less than or equal to the first voltage threshold or the output voltage is greater than or equal to the second voltage threshold, generating fault reminder information, and displaying the fault reminder information and the set air pressure value on the instrument. The present invention can determine whether the air pressure sensor is faulty, thereby improving the accuracy of the air pressure value detection of the component to be tested by the air pressure sensor and the instrument.

Description

Technical Field

[0001] The present invention relates to the field of automobile electronic control technology, and in particular to an air pressure detection method, an air compressor inflation method, a system and a vehicle. Background Art

[0002] The existing commercial vehicle instrument display air pressure solution is: the air pressure sensor is hard-wired to the instrument, the instrument supplies power to the sensor, and the instrument displays the air pressure value, wherein the display range of the instrument is 0-13bar.

[0003] The specific display strategy of the existing commercial vehicle instrument for the air pressure sensor is: the instrument detects the voltage at the signal end of the air pressure sensor. If the voltage at the signal end of the air pressure sensor is less than or equal to 0.5V, the air pressure on the instrument is displayed as 0, otherwise it displays the actual value; if the actual air pressure value is greater than the display range of the instrument, that is: 13bar, the air pressure on the instrument is displayed as 13bar, otherwise it displays the actual value. The above display strategy has the following technical problems: it does not take into account the situation when the air pressure sensor fails, that is: the above display strategy is based on the strategy when the air pressure sensor is not faulty, and when the air pressure sensor fails, the voltage at the signal end of the air pressure sensor is less than or equal to 0.5V, and the air pressure value detected by the instrument is greater than 13bar. However, when these situations occur, the displayed air pressure value is not the actual air pressure value of the component to be tested, resulting in inaccurate detection of the air pressure value of the component to be tested.

[0004] Therefore, it is urgent to propose an air pressure detection method, an air compressor inflation method, a system and a vehicle to solve the above technical problems. Summary of the invention

[0005] In view of this, it is necessary to provide an air pressure detection method, an air compressor inflation method, a system and a vehicle to solve the technical problem existing in the prior art that inaccurate air pressure detection of the component to be tested is caused by not considering the failure of the air pressure sensor.

[0006] In one aspect, the present invention provides an air pressure detection method for detecting an air pressure value of a component to be tested based on an air pressure sensor and an instrument for powering the air pressure sensor, the air pressure detection method comprising:

[0007] Obtaining a supply voltage and an output voltage of the air pressure sensor;

[0008] Determine a first voltage threshold and a second voltage threshold based on the supply voltage, and determine whether the output voltage is less than or equal to the first voltage threshold, and whether the output voltage is greater than or equal to the second voltage threshold;

[0009] When the output voltage is greater than the first voltage threshold and less than the second voltage threshold, the air pressure value of the component to be tested is determined based on the pre-established air pressure conversion relationship, the output voltage and the supply voltage, and the air pressure value is displayed on the instrument;

[0010] When the output voltage is less than or equal to the first voltage threshold, or when the output voltage is greater than or equal to the second voltage threshold, a fault reminder message is generated, and the fault reminder message and the set air pressure value are displayed on the instrument.

[0011] In some possible implementations, determining the first voltage threshold and the second voltage threshold based on the supply voltage includes:

[0012] determining a first percentage threshold and a second percentage threshold;

[0013] determining the first voltage threshold based on the supply voltage and the first percentage threshold;

[0014] The second voltage threshold is determined based on the supply voltage and the second percentage threshold.

[0015] In some possible implementations, the air pressure conversion relationship is:

[0016] P=(Vout / Vcc*100-10) / 54.222*1000

[0017] Where P is the air pressure value; Vcc is the supply voltage; Vout is the output voltage.

[0018] In some possible implementations, the fault reminder information includes first fault reminder information and second fault reminder information; when the output voltage is less than or equal to the first voltage threshold, or the output voltage is greater than or equal to the second voltage threshold, generating the fault reminder information includes:

[0019] When the output voltage is less than or equal to the first voltage threshold, generating the first fault reminder information;

[0020] When the output voltage is greater than or equal to the second voltage threshold, the second fault reminder information is generated.

[0021] On the other hand, the present invention also provides an air compressor pumping method, comprising:

[0022] Based on the air pressure detection method, the air pressure of the front axle circuit and the air pressure of the rear axle circuit of the vehicle are detected respectively, and the air pressure detection results of the front axle circuit and the air pressure detection results of the rear axle circuit are obtained accordingly;

[0023] Determining whether the air pressure of the front axle circuit is credible based on the front axle circuit air pressure detection result, and determining whether the air pressure of the rear axle circuit is credible based on the rear axle circuit air pressure detection result;

[0024] When the air pressure of the front axle circuit is credible and the air pressure of the rear axle circuit is not credible, the air pressure of the front axle circuit is used as a reference pressure value for the air compressor inflation strategy;

[0025] When the air pressure of the front axle circuit is unreliable and the air pressure of the rear axle circuit is reliable, the air pressure of the rear axle circuit is used as a reference pressure value for the air compressor inflation strategy;

[0026] When the air pressure of the front axle circuit is unreliable and the air pressure of the rear axle circuit is also unreliable, the air compressor is controlled to work without stopping;

[0027] The air pressure detection method is any one of the possible implementations described above.

[0028] In some possible implementations, the front axle circuit air pressure detection result includes a front axle circuit output voltage, and the rear axle circuit air pressure detection result includes a rear axle circuit output voltage; judging whether the front axle circuit air pressure is credible based on the front axle circuit air pressure detection result, and judging whether the rear axle circuit air pressure is credible based on the rear axle circuit air pressure detection result, includes:

[0029] When the front axle circuit output voltage is greater than or equal to the first voltage high threshold, or the front axle circuit output voltage is less than or equal to the first voltage low threshold, the front axle circuit air pressure is unreliable;

[0030] When the rear axle circuit output voltage is greater than or equal to the second voltage high threshold, or the rear axle circuit output voltage is less than or equal to the second voltage low threshold, the rear axle circuit air pressure is not credible.

[0031] In some possible implementations, judging whether the front axle circuit air pressure is credible based on the front axle circuit air pressure detection result, and judging whether the rear axle circuit air pressure is credible based on the rear axle circuit air pressure detection result, includes:

[0032] When the front axle circuit output voltage is greater than or equal to a first voltage high threshold, or when the front axle circuit output voltage is less than or equal to a first voltage low threshold, a front axle fault reminder message is generated;

[0033] When the rear axle circuit output voltage is greater than or equal to a second voltage high threshold, or when the rear axle circuit output voltage is less than or equal to a second voltage low threshold, generating a rear axle fault reminder message;

[0034] When the front axle fault reminder message is received, the front axle circuit air pressure is not credible, and when the rear axle fault reminder message is received, the rear axle circuit air pressure is not credible.

[0035] On the other hand, the present invention also provides an air pressure detection system for detecting the air pressure value of a component to be tested based on an air pressure sensor and an instrument for powering the air pressure sensor, the air pressure detection system comprising:

[0036] A voltage acquisition unit, used to acquire the supply voltage and output voltage of the air pressure sensor;

[0037] a supply voltage determination unit, configured to determine a first voltage threshold and a second voltage threshold based on the supply voltage, and to determine whether the output voltage is less than or equal to the first voltage threshold, and whether the output voltage is greater than or equal to the second voltage threshold;

[0038] an air pressure value display unit, for determining the air pressure value of the component to be tested based on a pre-established air pressure conversion relationship, the output voltage and the supply voltage when the output voltage is greater than the first voltage threshold and less than the second voltage threshold, and displaying the air pressure value on the instrument;

[0039] A fault display unit is used to generate fault reminder information when the output voltage is less than or equal to the first voltage threshold, or the output voltage is greater than or equal to the second voltage threshold, and display the fault reminder information and the set air pressure value on the instrument.

[0040] On the other hand, the present invention also provides an air compressor inflation system, comprising:

[0041] A circuit air pressure detection unit, used to detect the front axle circuit air pressure and the rear axle circuit air pressure of the vehicle respectively based on the air pressure detection method, and obtain the front axle circuit air pressure detection result and the rear axle circuit air pressure detection result accordingly;

[0042] a detection result judgment unit, configured to judge whether the air pressure of the front axle circuit is credible based on the detection result of the air pressure of the front axle circuit, and to judge whether the air pressure of the rear axle circuit is credible based on the detection result of the air pressure of the rear axle circuit;

[0043] A first air pumping unit is used for taking the air pressure of the front axle circuit as a reference pressure value of the air compressor air pumping strategy when the air pressure of the front axle circuit is credible and the air pressure of the rear axle circuit is not credible;

[0044] A second air pumping unit is used for, when the air pressure of the front axle circuit is unreliable and the air pressure of the rear axle circuit is credible, using the air pressure of the rear axle circuit as a reference pressure value for an air compressor air pumping strategy;

[0045] A third air pumping unit is used to control the air compressor to work without stopping when the air pressure of the front axle circuit is unreliable and the air pressure of the rear axle circuit is also unreliable;

[0046] The air pressure detection method is any one of the possible implementations described above.

[0047] In another aspect, the present invention further provides a vehicle, comprising a memory and a processor, wherein:

[0048] The memory is used to store programs;

[0049] The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps of the air pressure detection method in any possible implementation manner described above, and / or the steps of the air compressor inflation method in any possible implementation manner described above.

[0050] The beneficial effect of adopting the above-mentioned implementation method is as follows: the air pressure detection method provided by the present invention determines whether the output voltage of the air pressure sensor is less than or equal to the first voltage threshold, and whether the output voltage is greater than or equal to the second voltage threshold. When the output voltage is greater than the first voltage threshold and less than the second voltage threshold, it is determined that the air pressure sensor is not faulty, and the air pressure value of the component to be tested is directly determined according to the pre-constructed air pressure conversion relationship, the output voltage and the power supply voltage, and the air pressure value is displayed on the instrument; and when the output voltage is less than or equal to the first voltage threshold, or the output voltage is greater than or equal to the second voltage threshold, it is determined that the air pressure sensor is faulty, and a fault reminder message is generated, and the fault reminder message and the set air pressure value are displayed on the instrument. The fault reminder message prompts the staff that the air pressure sensor is faulty, thereby avoiding the technical problem of erroneous detection of the air pressure value of the component to be tested due to unclear air pressure sensor failure, thereby improving the accuracy of air pressure detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0052] Figure 1 A schematic diagram of an embodiment of the air pressure detection method provided by the present invention;

[0053] Figure 2 For the present invention Figure 1 A schematic diagram of an embodiment of determining a first voltage threshold and a second voltage threshold in a flow chart;

[0054] Figure 3 A schematic flow chart of an embodiment of the air compressor pumping method provided by the present invention;

[0055] Figure 4 A schematic structural diagram of an embodiment of the air pressure detection system provided by the present invention;

[0056] Figure 5 A schematic structural diagram of an embodiment of an air compressor inflation system provided by the present invention;

[0057] Figure 6 A schematic structural diagram of an embodiment of a vehicle provided by the present invention. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0059] It should be understood that the schematic drawings are not drawn to scale. The flow chart used in the present invention shows the operations implemented according to some embodiments of the present invention. It should be understood that the operations of the flow chart can be implemented out of order, and the steps without logical context can be reversed or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flow chart under the guidance of the content of the present invention, and can also remove one or more operations from the flow chart.

[0060] Some of the block diagrams shown in the accompanying drawings are functional entities that do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor systems and / or microcontroller systems.

[0061] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0062] If described as "first", "second", etc., it is only used for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0063] The embodiments of the present invention provide an air pressure detection method, an air compressor inflation method, a system and a vehicle, which are described below respectively.

[0064] The air pressure sensor includes a signal terminal, a ground terminal and a power supply terminal. The signal terminal is connected to the component to be tested, the ground terminal is connected to the ground wire, and the power supply terminal is connected to the instrument. In the process of detecting the air pressure value of the component to be tested based on the air pressure sensor and the instrument, the air pressure sensor may have a fault event such as the power supply terminal being disconnected from the instrument, the ground terminal being disconnected from the ground wire, the signal terminal being disconnected from the component to be tested, a short circuit between the power supply terminal and the signal terminal, a short circuit between the power supply terminal and the ground terminal, and a short circuit between the ground terminal and the signal terminal due to external force or other reasons. In order to avoid the technical problem of inaccurate detection results of the air pressure value of the component to be tested by the air pressure sensor and the instrument when these fault events occur.

[0065] In order to solve the above technical problems, an embodiment of the present invention provides an air pressure detection method. Figure 1 The present invention provides a flow chart of an embodiment of the air pressure detection method, which is used to detect the air pressure value of the component to be tested based on an air pressure sensor and an instrument that supplies power to the air pressure sensor, such as Figure 1 As shown, the air pressure detection method includes:

[0066] S101, obtaining the supply voltage and output voltage of the air pressure sensor;

[0067] S102, determining a first voltage threshold and a second voltage threshold based on the supply voltage, and determining whether the output voltage is less than or equal to the first voltage threshold, and whether the output voltage is greater than or equal to the second voltage threshold;

[0068] S103, when the output voltage is greater than the first voltage threshold and less than the second voltage threshold, determining the air pressure value of the component to be tested based on the pre-established air pressure conversion relationship, the output voltage and the power supply voltage, and displaying the air pressure value on the instrument;

[0069] S104: When the output voltage is less than or equal to the first voltage threshold, or the output voltage is greater than or equal to the second voltage threshold, a fault reminder message is generated, and the fault reminder message and the set air pressure value are displayed on the instrument.

[0070] Compared with the prior art, the air pressure detection method provided in the embodiment of the present invention determines whether the output voltage of the air pressure sensor is less than or equal to the first voltage threshold, and whether the output voltage is greater than or equal to the second voltage threshold. When the output voltage is greater than the first voltage threshold and less than the second voltage threshold, it is determined that the air pressure sensor is not faulty, and the air pressure value of the component to be tested is directly determined according to the pre-constructed air pressure conversion relationship, the output voltage and the power supply voltage, and the air pressure value is displayed on the instrument; when the output voltage is less than or equal to the first voltage threshold, or the output voltage is greater than or equal to the second voltage threshold, it is determined that the air pressure sensor is faulty, and a fault reminder message is generated, and the fault reminder message and the set air pressure value are displayed on the instrument. The fault reminder message prompts the staff that the air pressure sensor is faulty, thereby avoiding the technical problem of erroneous detection of the air pressure value of the component to be tested due to unclear failure of the air pressure sensor, and improving the accuracy of air pressure detection.

[0071] It should be noted that: in step S103, if the air pressure value of the component to be tested determined based on the pre-established air pressure conversion relationship, output voltage and power supply voltage exceeds the display range of the instrument, the maximum value of the range is displayed on the instrument. For example: if the display range of the instrument is 0-13 bar, and the air pressure value of the component to be tested determined is 14 bar, the air pressure value displayed on the instrument is 13 bar.

[0072] It should also be noted that the instrument and the air pressure sensor are hard-wired.

[0073] In a specific embodiment of the present invention, the air pressure value is set to 0 bar.

[0074] In some embodiments of the present invention, Figure 2 As shown, determining the first voltage threshold and the second voltage threshold based on the supply voltage in step S102 includes:

[0075] S201, determining a first percentage threshold and a second percentage threshold;

[0076] S202, determining a first voltage threshold based on the supply voltage and a first percentage threshold;

[0077] S203: Determine a second voltage threshold based on the supply voltage and the second percentage threshold.

[0078] In a specific embodiment of the present invention, the first percentage threshold is 4% and the second percentage threshold is 96%.

[0079] Specifically, the first voltage threshold is: 4%*V cc , the second voltage threshold is: 96%*V cc .

[0080] It should be understood that the first percentage threshold and the second percentage threshold can be set or adjusted according to actual application scenarios, which will not be described in detail here.

[0081] In a specific embodiment of the present invention, the air pressure conversion relationship is:

[0082] P=(V out / V cc *100-10) / 54.222*1000

[0083] Where, P is the air pressure value, unit is kPa; V cc is the supply voltage; V out is the output voltage.

[0084] In some embodiments of the present invention, the fault reminder information includes first fault reminder information and second fault reminder information; then step S104 includes:

[0085] When the output voltage is less than or equal to a first voltage threshold, generating first fault reminder information;

[0086] When the output voltage is greater than or equal to the second voltage threshold, second fault reminder information is generated.

[0087] Among them, the first fault reminder information is: the air pressure sensor voltage is low; the second fault reminder information is: the air pressure sensor voltage is high.

[0088] In actual application scenarios, traffic accidents caused by brake system failures account for 45% of the total. The air compressor is one of the key components of the brake system, and the air compressor's inflation strategy is closely related to the air pressure values ​​of the front and rear axles of the vehicle. The air pressure values ​​of the front and rear axles are obtained by air pressure sensors and instrument detection. The air compressor inflation strategy in the prior art is: when the air pressure values ​​of the front and rear axles displayed by the instrument are both greater than 13 bar, the air compressor does not inflate, that is: the vehicle does not brake. However, when the air pressure sensor fails, the air pressure values ​​of the front and rear axles displayed by the instrument are both greater than 13 bar, but at this time the air compressor is needed to inflate to brake the vehicle. That is: when the air pressure sensor fails, it will cause unreasonable braking of the vehicle, causing driving safety problems.

[0089] In order to solve this technical problem, an embodiment of the present invention provides an air compressor inflation method. Figure 3 A schematic flow chart of an embodiment of the air compressor pumping method provided by the present invention is as follows: Figure 3 As shown, the air compressor pumping methods include:

[0090] S301, based on the air pressure detection method, respectively detect the air pressure of the front axle circuit and the air pressure of the rear axle circuit of the vehicle, and obtain the air pressure detection results of the front axle circuit and the air pressure detection results of the rear axle circuit;

[0091] S302, judging whether the air pressure of the front axle circuit is credible based on the front axle circuit air pressure detection result, and judging whether the air pressure of the rear axle circuit is credible based on the rear axle circuit air pressure detection result;

[0092] S303, when the air pressure of the front axle circuit is credible and the air pressure of the rear axle circuit is not credible, the air pressure of the front axle circuit is used as a reference pressure value for the air compressor inflation strategy;

[0093] S304: when the air pressure of the front axle circuit is unreliable but the air pressure of the rear axle circuit is reliable, the air pressure of the rear axle circuit is used as a reference pressure value for the air compressor inflation strategy;

[0094] S305, when the air pressure of the front axle circuit is unreliable and the air pressure of the rear axle circuit is also unreliable, the air compressor is controlled to work without stopping;

[0095] The air pressure detection method is the air pressure detection method in any one of the above embodiments.

[0096] The air compressor inflation method provided in the embodiment of the present invention first detects the front axle circuit air pressure and the rear axle circuit air pressure of the vehicle respectively based on the air pressure detection method, obtains the front axle circuit air pressure detection result and the rear axle circuit air pressure detection result respectively, and judges whether the front axle circuit air pressure is credible based on the front axle circuit air pressure detection result, and judges whether the rear axle circuit air pressure is credible based on the rear axle circuit air pressure detection result. When the front axle circuit air pressure is credible and the rear axle circuit air pressure is not credible, that is, when the air pressure sensor for detecting the rear axle circuit air pressure fails and the air pressure sensor for detecting the front axle circuit air pressure is not failed, The air pressure of the front axle circuit is used as the reference pressure value of the air compressor inflation strategy; when the air pressure of the front axle circuit is unreliable and the air pressure of the rear axle circuit is reliable, that is, when the air pressure sensor for detecting the air pressure of the front axle circuit fails and the air pressure sensor for detecting the air pressure of the rear axle circuit is not faulty, the air pressure of the rear axle circuit is used as the reference pressure value of the air compressor inflation strategy; when the air pressure of the front axle circuit is unreliable and the air pressure of the rear axle circuit is also unreliable, that is, when the air pressure sensor for detecting the air pressure of the front axle circuit fails and the air pressure sensor for detecting the air pressure of the rear axle circuit also fails, the air compressor is controlled to work without stopping. That is, avoid the air compressor from not inflating due to the failure of the air pressure sensor, ensure the braking performance of the vehicle, and then improve the driving safety of the vehicle.

[0097] It should be noted that: when the front axle circuit air pressure is unreliable, the instrument displaying the front axle circuit air pressure shows the air pressure as 0 bar. Similarly, when the rear axle circuit air pressure is unreliable, the instrument displaying the rear axle circuit air pressure shows the air pressure as 0 bar.

[0098] In some embodiments of the present invention, the front axle circuit air pressure detection result includes the front axle circuit output voltage, and the rear axle circuit air pressure detection result includes the rear axle circuit output voltage; then step S303 includes:

[0099] When the front axle circuit output voltage is greater than or equal to the first voltage high threshold, or the front axle circuit output voltage is less than or equal to the first voltage low threshold, the front axle circuit air pressure is unreliable;

[0100] When the rear axle circuit output voltage is greater than or equal to the second voltage high threshold, or the rear axle circuit output voltage is less than or equal to the second voltage low threshold, the rear axle circuit air pressure is not credible.

[0101] Specifically, the first high voltage threshold is 96% of the front axle circuit power supply voltage, and the first low voltage threshold is 4% of the front axle circuit power supply voltage; the second high voltage threshold is 96% of the rear axle circuit power supply voltage, and the second low voltage threshold is 4% of the rear axle circuit power supply voltage.

[0102] In actual applications, whether the air compressor inflates is controlled by the inflation command issued by the controller, and the controller generates the inflation command by receiving messages of whether the air pressure of the front axle circuit is reliable and whether the air pressure of the rear axle circuit is reliable. The method of directly sending the output voltage of the front axle circuit and the output voltage of the rear axle circuit to the controller requires the controller to compare the output voltage with the voltage low threshold and the voltage high threshold, and generate the inflation command according to the comparison result. The generation speed of the inflation command is slow. In order to increase the generation speed of the inflation command, that is, to increase the braking reaction speed of the air compressor, in some embodiments of the present invention, step S302 includes:

[0103] When the output voltage of the front bridge circuit is greater than or equal to the first voltage high threshold, or when the output voltage of the front bridge circuit is less than or equal to the first voltage low threshold, a front bridge fault reminder message is generated;

[0104] When the rear axle circuit output voltage is greater than or equal to the second voltage high threshold, or when the rear axle circuit output voltage is less than or equal to the second voltage low threshold, generating a rear axle fault reminder message;

[0105] When a front axle fault warning message is received, the front axle circuit air pressure is unreliable; when a rear axle fault warning message is received, the rear axle circuit air pressure is unreliable.

[0106] The embodiment of the present invention determines whether the front axle circuit air pressure and the rear axle circuit air pressure are credible by generating a front axle fault reminder message and / or a rear axle fault reminder message, thereby improving the efficiency of judging whether the front axle circuit air pressure and the rear axle circuit air pressure are credible, thereby improving the air pumping efficiency of the air compressor.

[0107] In a specific embodiment of the present invention, the front axle fault reminder message includes a first front axle fault reminder message and a second front axle fault reminder message. When the front bridge circuit output voltage is greater than or equal to the first voltage high threshold, the first front axle fault reminder message is generated, and when the front bridge circuit output voltage is less than or equal to the first voltage low threshold, the second front axle fault reminder message is generated.

[0108] Similarly, the rear axle fault reminder message includes a first rear axle fault reminder message and a second rear-front axle fault reminder message. When the rear axle circuit output voltage is greater than or equal to the second voltage high threshold, the first rear axle fault reminder message is generated, and when the rear axle circuit output voltage is less than or equal to the second voltage low threshold, the second rear axle fault reminder message is generated.

[0109] Specifically, when the first front axle fault reminder message or the second front axle fault reminder message is received, the front axle circuit air pressure is unreliable; when the first rear axle fault reminder message or the second rear axle fault reminder message is received, the rear axle circuit air pressure is unreliable; when the first front axle fault reminder message and the first rear axle fault reminder message are received at the same time, or, the second front axle fault reminder message and the first rear axle fault reminder message are received at the same time, or, the first front axle fault reminder message and the second rear axle fault reminder message are received, or the second front axle fault reminder message and the second rear axle fault reminder message are received, in these four situations, both the front axle circuit air pressure and the rear axle circuit air pressure are unreliable.

[0110] It should be noted that the first front axle fault reminder message is obtained after message compilation based on the generated first front axle fault reminder information. Specifically, the first front axle fault reminder information is "front axle circuit air pressure sensor voltage is high", and the corresponding first front axle fault reminder message is "523004.3"; the second front axle fault reminder information is "front axle circuit air pressure sensor voltage is low", and the corresponding second front axle fault reminder message is "523004.4"; the first rear axle fault reminder information is "rear axle circuit air pressure sensor voltage is high", and the corresponding first rear axle fault reminder message is "523005.3"; the second rear axle fault reminder information is "rear axle circuit air pressure sensor voltage is low", and the corresponding second rear axle fault reminder message is "523005.4".

[0111] In order to better implement the air pressure detection method in the embodiment of the present invention, based on the air pressure detection method, the embodiment of the present invention also provides an air pressure detection system for detecting the air pressure value of the component to be tested based on an air pressure sensor and an instrument for powering the air pressure sensor, such as Figure 4 As shown, the air pressure detection system 400 includes:

[0112] The voltage acquisition unit 401 is used to acquire the supply voltage and output voltage of the air pressure sensor;

[0113] A supply voltage determination unit 402, configured to determine a first voltage threshold and a second voltage threshold based on the supply voltage, and to determine whether the output voltage is less than or equal to the first voltage threshold, and whether the output voltage is greater than or equal to the second voltage threshold;

[0114] The air pressure value display unit 403 is used to determine the air pressure value of the component to be tested based on the pre-established air pressure conversion relationship, the output voltage and the supply voltage when the output voltage is greater than the first voltage threshold and less than the second voltage threshold, and display the air pressure value on the instrument;

[0115] The fault display unit 404 is used to generate fault reminder information when the output voltage is less than or equal to the first voltage threshold, or the output voltage is greater than or equal to the second voltage threshold, and display the fault reminder information and the set air pressure value on the instrument.

[0116] The air pressure detection system 400 provided in the above embodiment can implement the technical solution described in the above air pressure detection method embodiment. The specific implementation principles of the above modules or units can refer to the corresponding contents in the above air pressure detection method embodiment, which will not be repeated here.

[0117] In order to better implement the air compressor pumping method in the embodiment of the present invention, based on the air compressor pumping method, the embodiment of the present invention also provides an air compressor pumping system, such as Figure 5 As shown, the air compressor inflation system 500 includes:

[0118] A circuit air pressure detection unit 501 is used to detect the front axle circuit air pressure and the rear axle circuit air pressure of the vehicle respectively based on the air pressure detection method, and obtain the front axle circuit air pressure detection result and the rear axle circuit air pressure detection result accordingly;

[0119] A detection result judgment unit 502, used to judge whether the front axle circuit air pressure is credible based on the front axle circuit air pressure detection result, and to judge whether the rear axle circuit air pressure is credible based on the rear axle circuit air pressure detection result;

[0120] The first air pumping unit 503 is used to use the air pressure of the front axle circuit as a reference pressure value for the air compressor air pumping strategy when the air pressure of the front axle circuit is credible and the air pressure of the rear axle circuit is not credible;

[0121] The second air pumping unit 504 is used to use the air pressure of the rear axle circuit as a reference pressure value for the air compressor air pumping strategy when the air pressure of the front axle circuit is unreliable but the air pressure of the rear axle circuit is reliable;

[0122] The third air pumping unit 505 is used to control the air compressor to work without stopping when the air pressure of the front axle circuit is unreliable and the air pressure of the rear axle circuit is also unreliable;

[0123] The air pressure detection method is the air pressure detection method in any one of the above embodiments.

[0124] The air compressor inflation system 500 provided in the above embodiment can implement the technical solution described in the above air compressor inflation method embodiment. The specific implementation principles of the above modules or units can refer to the corresponding contents in the above air compressor inflation method embodiment, which will not be repeated here.

[0125] like Figure 6 As shown, the present invention also provides a vehicle 600. The vehicle 600 includes a processor 601, a memory 602 and a display 603. Figure 6 Only some of the components of vehicle 600 are shown, but it should be understood that implementation of all of the components shown is not a requirement, and more or fewer components may alternatively be implemented.

[0126] In some embodiments, the processor 601 can be a central processing unit (CPU), a microprocessor or other data processing chip, used to run the program code or process data stored in the memory 602, such as the air pressure detection method and / or the air compressor inflation method in the present invention.

[0127] In some embodiments, the processor 601 may be a single server or a server group. The server group may be centralized or distributed. In some embodiments, the processor 601 may be local or remote. In some embodiments, the processor 601 may be implemented in a cloud platform. In one embodiment, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-cloud, etc., or any combination thereof.

[0128] In some embodiments, the memory 602 may be an internal storage unit of the vehicle 600, such as a hard disk or memory of the vehicle 600. In other embodiments, the memory 602 may also be an external storage device of the vehicle 600, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc., equipped on the vehicle 600.

[0129] Furthermore, the memory 602 may include both an internal storage unit of the vehicle 600 and an external storage device. The memory 602 is used to store application software installed in the vehicle 600 and various data.

[0130] In some embodiments, the display 603 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 603 is used to display information on the vehicle 600 and to display a visual user interface. The components 601-603 of the vehicle 600 communicate with each other via a system bus.

[0131] In some embodiments of the present invention, when the processor 601 executes the air pressure detection program in the memory 602, the following steps may be implemented:

[0132] Get the supply voltage and output voltage of the air pressure sensor;

[0133] Determine a first voltage threshold and a second voltage threshold based on the supply voltage, and determine whether the output voltage is less than or equal to the first voltage threshold, and whether the output voltage is greater than or equal to the second voltage threshold;

[0134] When the output voltage is greater than the first voltage threshold and less than the second voltage threshold, the air pressure value of the component to be tested is determined based on the pre-established air pressure conversion relationship, the output voltage and the power supply voltage, and the air pressure value is displayed on the instrument;

[0135] When the output voltage is less than or equal to the first voltage threshold, or the output voltage is greater than or equal to the second voltage threshold, a fault reminder message is generated, and the fault reminder message and the set air pressure value are displayed on the instrument.

[0136] It should be understood that: when the processor 601 executes the air pressure detection program in the memory 602, in addition to the above functions, other functions can also be implemented. For details, please refer to the description of the previous related method embodiments.

[0137] In some embodiments of the present invention, when the processor 601 executes the air compressor pumping program in the memory 602, the following steps may be implemented:

[0138] Based on the air pressure detection method, the air pressure of the front axle circuit and the air pressure of the rear axle circuit of the vehicle are detected respectively, and the air pressure detection results of the front axle circuit and the air pressure detection results of the rear axle circuit are obtained accordingly;

[0139] judging whether the air pressure of the front axle circuit is credible based on the front axle circuit air pressure detection result, and judging whether the air pressure of the rear axle circuit is credible based on the rear axle circuit air pressure detection result;

[0140] When the air pressure of the front axle circuit is credible and the air pressure of the rear axle circuit is unreliable, the air pressure of the front axle circuit is used as the reference pressure value of the air compressor inflation strategy;

[0141] When the air pressure of the front axle circuit is unreliable but the air pressure of the rear axle circuit is reliable, the air pressure of the rear axle circuit is used as the reference pressure value of the air compressor inflation strategy;

[0142] When the air pressure in the front axle circuit is unreliable and the air pressure in the rear axle circuit is also unreliable, the air compressor is controlled to work without stopping.

[0143] It should be understood that: when the processor 601 executes the air compressor inflation program in the memory 602, in addition to the above functions, other functions can also be implemented. For details, please refer to the description of the previous related method embodiments.

[0144] Accordingly, an embodiment of the present application also provides a computer-readable storage medium, which is used to store computer-readable programs or instructions. When the program or instructions are executed by a processor, it can implement the air pressure detection method provided in the above-mentioned method embodiments, and / or the steps or functions in the air compressor inflation method.

[0145] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware (such as a processor, a controller, etc.) through a computer program, and the computer program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0146] The above is a detailed introduction to the air pressure detection method, air compressor inflation method, system and vehicle provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for detecting air pressure, characterized in that: The method is used to detect the air pressure value of the component to be tested based on an air pressure sensor and an instrument that supplies power to the air pressure sensor, and the air pressure detection method includes: Obtaining a supply voltage and an output voltage of the air pressure sensor; Determine a first voltage threshold and a second voltage threshold based on the supply voltage, and determine whether the output voltage is less than or equal to the first voltage threshold, and whether the output voltage is greater than or equal to the second voltage threshold; When the output voltage is greater than the first voltage threshold and less than the second voltage threshold, the air pressure value of the component to be tested is determined based on the pre-established air pressure conversion relationship, the output voltage and the supply voltage, and the air pressure value is displayed on the instrument; When the output voltage is less than or equal to the first voltage threshold, or the output voltage is greater than or equal to the second voltage threshold, a fault reminder message is generated, and the fault reminder message and the set air pressure value are displayed on the instrument; The determining the first voltage threshold and the second voltage threshold based on the supply voltage comprises: determining a first percentage threshold and a second percentage threshold; determining the first voltage threshold based on the supply voltage and the first percentage threshold; The second voltage threshold is determined based on the supply voltage and the second percentage threshold.

2. The air pressure detection method according to claim 1, characterized in that: The air pressure conversion relationship is: P=(V out / V cc *100-10) / 54.222*1000 Where P is the air pressure; V cc is the supply voltage; V out is the output voltage.

3. The air pressure detection method according to claim 1, characterized in that: The fault reminder information includes first fault reminder information and second fault reminder information; when the output voltage is less than or equal to the first voltage threshold, or the output voltage is greater than or equal to the second voltage threshold, generating the fault reminder information includes: When the output voltage is less than or equal to the first voltage threshold, generating the first fault reminder information; When the output voltage is greater than or equal to the second voltage threshold, the second fault reminder information is generated.

4. A method for pumping air with an air compressor, characterized in that: include: Based on the air pressure detection method, the air pressure of the front axle circuit and the air pressure of the rear axle circuit of the vehicle are detected respectively, and the air pressure detection results of the front axle circuit and the air pressure detection results of the rear axle circuit are obtained accordingly; Determining whether the air pressure of the front axle circuit is credible based on the front axle circuit air pressure detection result, and determining whether the air pressure of the rear axle circuit is credible based on the rear axle circuit air pressure detection result; When the air pressure of the front axle circuit is credible and the air pressure of the rear axle circuit is not credible, the air pressure of the front axle circuit is used as a reference pressure value for the air compressor inflation strategy; When the air pressure of the front axle circuit is unreliable and the air pressure of the rear axle circuit is reliable, the air pressure of the rear axle circuit is used as a reference pressure value for the air compressor inflation strategy; When the air pressure of the front axle circuit is unreliable and the air pressure of the rear axle circuit is also unreliable, the air compressor is controlled to work without stopping; Wherein, the air pressure detection method is the air pressure detection method described in any one of claims 1-3.

5. The air compressor pumping method according to claim 4, characterized in that: The front axle circuit air pressure detection result includes the front axle circuit output voltage, and the rear axle circuit air pressure detection result includes the rear axle circuit output voltage; judging whether the front axle circuit air pressure is credible based on the front axle circuit air pressure detection result, and judging whether the rear axle circuit air pressure is credible based on the rear axle circuit air pressure detection result, includes: When the front axle circuit output voltage is greater than or equal to the first voltage high threshold, or the front axle circuit output voltage is less than or equal to the first voltage low threshold, the front axle circuit air pressure is unreliable; When the rear axle circuit output voltage is greater than or equal to the second voltage high threshold, or the rear axle circuit output voltage is less than or equal to the second voltage low threshold, the rear axle circuit air pressure is not credible.

6. The air compressor pumping method according to claim 5, characterized in that: The determining whether the front axle circuit air pressure is credible based on the front axle circuit air pressure detection result, and determining whether the rear axle circuit air pressure is credible based on the rear axle circuit air pressure detection result, includes: When the front axle circuit output voltage is greater than or equal to a first voltage high threshold, or when the front axle circuit output voltage is less than or equal to a first voltage low threshold, a front axle fault reminder message is generated; When the rear axle circuit output voltage is greater than or equal to a second voltage high threshold, or when the rear axle circuit output voltage is less than or equal to a second voltage low threshold, generating a rear axle fault reminder message; When the front axle fault reminder message is received, the front axle circuit air pressure is not credible, and when the rear axle fault reminder message is received, the rear axle circuit air pressure is not credible.

7. An air pressure detection system, characterized in that: The air pressure detection system is used to detect the air pressure value of the component to be tested based on an air pressure sensor and an instrument for powering the air pressure sensor, and the air pressure detection system includes: A voltage acquisition unit, used to acquire the supply voltage and output voltage of the air pressure sensor; a supply voltage determination unit, configured to determine a first voltage threshold and a second voltage threshold based on the supply voltage, and to determine whether the output voltage is less than or equal to the first voltage threshold, and whether the output voltage is greater than or equal to the second voltage threshold; an air pressure value display unit, for determining the air pressure value of the component to be tested based on a pre-established air pressure conversion relationship, the output voltage and the supply voltage when the output voltage is greater than the first voltage threshold and less than the second voltage threshold, and displaying the air pressure value on the instrument; a fault display unit, configured to generate fault reminder information when the output voltage is less than or equal to the first voltage threshold, or when the output voltage is greater than or equal to the second voltage threshold, and to display the fault reminder information and a set air pressure value on the instrument; The determining the first voltage threshold and the second voltage threshold based on the supply voltage comprises: determining a first percentage threshold and a second percentage threshold; determining the first voltage threshold based on the supply voltage and the first percentage threshold; The second voltage threshold is determined based on the supply voltage and the second percentage threshold.

8. An air compressor pumping system, characterized in that: include: A circuit air pressure detection unit, used to detect the front axle circuit air pressure and the rear axle circuit air pressure of the vehicle respectively based on the air pressure detection method, and obtain the front axle circuit air pressure detection result and the rear axle circuit air pressure detection result accordingly; a detection result judgment unit, configured to judge whether the air pressure of the front axle circuit is credible based on the detection result of the air pressure of the front axle circuit, and to judge whether the air pressure of the rear axle circuit is credible based on the detection result of the air pressure of the rear axle circuit; A first air pumping unit is used for taking the air pressure of the front axle circuit as a reference pressure value of the air compressor air pumping strategy when the air pressure of the front axle circuit is credible and the air pressure of the rear axle circuit is not credible; A second air pumping unit is used for, when the air pressure of the front axle circuit is unreliable and the air pressure of the rear axle circuit is credible, using the air pressure of the rear axle circuit as a reference pressure value for an air compressor air pumping strategy; A third air pumping unit is used to control the air compressor to work without stopping when the air pressure of the front axle circuit is unreliable and the air pressure of the rear axle circuit is also unreliable; Wherein, the air pressure detection method is the air pressure detection method described in any one of claims 1-3.

9. A vehicle, characterized in that: comprising a memory and a processor, wherein: The memory is used to store programs; The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps in the air pressure detection method described in any one of claims 1 to 3 above, and / or the steps in the air compressor inflation method described in any one of claims 4-6.

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