An automatic identification system for multiple wheel speed sensors

Abstract

The present invention belongs to the technical field of automobile industry, and is particularly an automatic identification system for multiple wheel speed sensors, including a signal input module, the signal input module is electrically connected to a current and voltage identification module, a pulse signal detection module and a PWM pulse detection module, the current and voltage identification module, the pulse signal detection module and the PWM pulse detection module are electrically connected to an information identification module, the information identification module is electrically connected to a comparison module, and one side of the comparison module is electrically connected to a wheel speed sensor sample library. The present invention, the wheel speed sensor system that can be identified autonomously reduces the low efficiency of manual labor, saves a lot of resources and costs, and greatly improves the use efficiency of automobile ECU.

Description

Technical Field

[0001] The invention relates to the technical field of automobile industry, in particular to an automatic identification system for multiple wheel speed sensors. Background Art

[0002] With the rapid development of the automotive industry, there are more and more types of wheel speed sensors, including magnetoelectric, standard coded Hall, intelligent PWM coded and pulse coded intelligent, etc. The increase in the types of wheel speed sensors makes it more complicated and cumbersome for the automotive ECU to identify the wheel speed sensors. To address this pain point, the wheel speed sensor identification software system is used to identify different wheel speed sensors when they are connected to the automotive system. The software identifies different wheel speed sensors and then directly applies the sensor to obtain the input wheel speed signal.

[0003] Currently, different wheel speed sensor types are identified by parsing different signals through chips. We determine the software design after knowing the existing sensor types, and then process the parsed signals to distinguish the sensor types. The original solution is inefficient because the software cannot perform the tedious trial and error process when the sensor type is unknown. Summary of the invention

[0004] The object of the present invention is to provide an automatic identification system for various wheel speed sensors to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic identification system for multiple wheel speed sensors, comprising a signal input module, wherein the signal input module is electrically connected to a current and voltage identification module, a pulse signal detection module and a PWM pulse detection module, wherein the current and voltage identification module, the pulse signal detection module and the PWM pulse detection module are electrically connected to an information identification module, wherein the information identification module is electrically connected to a comparison module, and one side of the comparison module is electrically connected to a wheel speed sensor sample library.

[0006] Preferably, the information identification module includes a multi-signal access module, the multi-signal access module is electrically connected to a PWM capture module and an ADC capture module, the PWM capture module and the ADC capture module are electrically connected to a numerical comparison module, and the numerical comparison module is electrically connected to a signal judgment module, which saves a lot of resources and costs, greatly improves the use efficiency of the automobile ECU, and increases the reusability of the software.

[0007] Preferably, the wheel speed sensor sample library is provided with various types of wheel speed modules, which reduces manual labor consumption and automatically identifies various sensor types without the need to manually modify the software of sensors of different vehicle models each time.

[0008] Preferably, the multi-signal access module is electrically connected to the current and voltage identification module, the pulse signal detection module and the PWM pulse detection module to ensure that the result of the judgment and identification is more accurate.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. The present invention receives, classifies, compares and identifies unknown sensor signals through an information identification module. Through the convenience and advantages of automatic identification by the comparison module, the sensor type can be actively identified instead of passively selecting the type and modifying the software design.

[0011] 2. The present invention also collects the amplitude and width of the pulse signal of the wheel speed sensor of the wheel speed sensor by the current and voltage recognition module, the pulse signal detection module and the PWM pulse detection module after the signal input module receives the signal because the wheel speed pulse signals of the wheel speed sensors in different wheel speed sensor sample libraries are different. Then, the type of the wheel speed sensor is identified by judging the difference in the collected signals, thereby reducing the low efficiency of manual labor and saving a lot of resources and costs.

[0012] 3. The present invention also captures the width and amplitude of the unknown sensor type input signal entering the multi-signal access module through the PWM capture module and ADC capture module channels of the MCU, and then compares and judges the captured values ​​with the signals of theoretically different wheel speed sensors, and finally outputs the type of the wheel speed sensor for rapid and automatic identification. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front cross-sectional view of the overall module structure of an automatic identification system for multiple wheel speed sensors of the present invention;

[0014] Figure 2 It is a schematic diagram of the module structure of an information identification module in an automatic identification system for multiple wheel speed sensors of the present invention;

[0015] Figure 3 It is a structural front section diagram of an existing wheel speed sensor identification system;

[0016] Figure 4 It is a structural front cross-sectional view of an information acquisition module in an automatic identification system of multiple wheel speed sensors of the present invention;

[0017] In the figure: 1. Signal input module; 2. Current and voltage identification module; 3. Pulse signal detection module; 4. PWM pulse detection module; 5. Information identification module; 6. Comparison module; 7. Wheel speed sensor sample library; 8. Wheel speed sensor sample library; 9. Wheel speed sensor sample library; 10. ADC capture module; 11. ADC capture module; 12. Signal judgment module. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-4 The present invention provides a technical solution: an automatic identification system for multiple wheel speed sensors, including a signal input module 1, wherein the signal input module 1 is electrically connected to a current and voltage identification module 2, a pulse signal detection module 3 and a PWM pulse detection module 4, wherein the current and voltage identification module 2, the pulse signal detection module 3 and the PWM pulse detection module 4 are electrically connected to an information identification module 5, wherein the information identification module 5 is electrically connected to a comparison module 6, wherein one side of the comparison module 6 is electrically connected to a wheel speed sensor sample library 7.

[0020] Preferably, the information identification module 5 includes a multi-signal access module 8, the multi-signal access module 8 is electrically connected to a PWM capture module 9 and an ADC capture module 10, the PWM capture module 9 and the ADC capture module 10 are electrically connected to a numerical comparison module 11, and the numerical comparison module 11 is electrically connected to a signal judgment module 12.

[0021] Preferably, the wheel speed sensor sample library 7 is provided with various types of wheel speed modules.

[0022] Preferably, the multi-signal access module 8 is electrically connected to the current and voltage identification module 2 , the pulse signal detection module 3 and the PWM pulse detection module 4 .

[0023] Working principle: When in use, due to the different input signals of different wheel speed sensors, the input signals of type 1, type 2, and type 3 wheel speed sensors in the wheel speed sensor sample library 7 are respectively 50% duty cycle, 7-14ma current signal, type 2 inputs different duty cycles, and different duty cycles have different meanings, 7-14ma current signal, type 3 inputs signals through AK protocol, with inconsistent duty cycles, and 7-28ma current signal. The hardware circuit will convert the current into a voltage signal, and then capture the input signal, through the PWM (pulse width modulation) module of the MCU (micro control unit) in the PWM signal capture module 9 and the ADC (analog quantity converted to digital) in the ADC capture module 10. The digital quantity) module captures the pulse signal duty cycle and voltage value of the input signal, and then compares the captured signal duty cycle and voltage value with the three types of signals in the theoretical wheel speed sensor sample library 7 to determine which type it is. Then the input sensor type can be obtained, and the input signal is further detected by the current and voltage recognition module 2, the pulse signal detection module 3 and the PWM pulse detection module 4 to ensure the accuracy of the detection and judgment. The convenience and advantage of automatic identification of the invention, the wheel speed sensor system that can identify independently reduces the low efficiency of manual labor, saves a lot of resources and costs, greatly improves the use efficiency of automobile ECU, increases the reusability of software, and does not need to manually modify the software of sensors of different models every time.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic identification system for multiple wheel speed sensors, comprising a signal input module (1), characterized in that: The signal input module (1) is electrically connected to a current and voltage identification module (2), a pulse signal detection module (3) and a PWM pulse detection module (4); the current and voltage identification module (2), the pulse signal detection module (3) and the PWM pulse detection module (4) are electrically connected to an information identification module (5); the information identification module (5) is electrically connected to a comparison module (6); and one side of the comparison module (6) is electrically connected to a wheel speed sensor sample library (7); The information identification module (5) comprises a multi-signal access module (8), the multi-signal access module (8) is electrically connected to a PWM capture module (9) and an ADC capture module (10), the PWM capture module (9) and the ADC capture module (10) are electrically connected to a value comparison module (11), and the value comparison module (11) is electrically connected to a signal judgment module (12), the PWM module of the MCU in the PWM capture module (9) and the ADC module in the ADC capture module (10) capture the pulse signal duty cycle and voltage value of the input signal, and then compare and judge the captured signal duty cycle and voltage value with three types of signals in a theoretical wheel speed sensor sample library (7) to obtain the input sensor type, and further detect the input signal through the current and voltage identification module (2), the pulse signal detection module (3) and the PWM pulse detection module (4) to ensure the accuracy of the detection and judgment.

2. The automatic identification system for multiple wheel speed sensors according to claim 1, characterized in that: The wheel speed sensor sample library (7) is provided with various types of wheel speed modules.

3. The automatic identification system for multiple wheel speed sensors according to claim 1, characterized in that: The multi-signal access module (8) is electrically connected to the current and voltage identification module (2), the pulse signal detection module (3) and the PWM pulse detection module (4).

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