Wheel speed sensor detection circuit and vehicle

Abstract

The invention provides a wheel speed sensor detection circuit and a vehicle. The wheel speed sensor detection circuit comprises a first conversion module, the input end of the first conversion module is electrically connected with a wheel speed sensor, and the first conversion module is used for converting an output signal of the wheel speed sensor into a preset voltage signal; the input end of the second conversion module is electrically connected with the output end of the first conversion module, the output end of the second conversion module is electrically connected with the controller, and the second conversion module is used for converting the preset voltage signal into a target format signal; wherein the output signal of the wheel speed sensor comprises any one of a voltage signal and a current signal. According to the wheel speed sensor detection circuit, compatible processing of different types of wheel speed sensor signals is achieved, the problem that in the prior art, a wheel speed sensor detection circuit can only process a single type of signals is solved, and the universality and compatibility of the circuit are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel speed detection, and in particular to a wheel speed sensor detection circuit and a vehicle. Background Art

[0002] In existing technology, vehicle speed is determined by collecting signals from wheel speed sensors, converting them, and inputting them into a microcontroller for calculation. There are two types of wheel speed sensors: active, which requires a power source and converts the wheel speed signal into a current; and passive, which does not require a power source and converts the wheel speed signal into a voltage. Existing wheel speed sensor detection circuits only convert and collect signals from one type of wheel speed sensor and are incompatible with both types, resulting in certain limitations.

[0003] Currently, no effective solutions have been proposed for the above technical problems. Summary of the Invention

[0004] The main purpose of the present invention is to provide a wheel speed sensor detection circuit and a vehicle to solve the problem in the prior art that the wheel speed sensor detection circuit can only process a single type of signal.

[0005] To achieve the above-mentioned objective, according to one aspect of the present invention, a wheel speed sensor detection circuit is provided, comprising: a first conversion module, an input end of the first conversion module being electrically connected to the wheel speed sensor, the first conversion module being used to convert an output signal of the wheel speed sensor into a preset voltage signal; a second conversion module, an input end of the second conversion module being electrically connected to an output end of the first conversion module, an output end of the second conversion module being electrically connected to a controller, the second conversion module being used to convert the preset voltage signal into a target format signal; wherein the output signal of the wheel speed sensor includes any one of a voltage signal and a current signal.

[0006] Furthermore, the wheel speed sensor detection circuit also includes: a power generation module, which is used to supply power to the wheel speed sensor, and the power generation module is electrically connected to the controller; wherein the power generation module has multiple output voltages to adapt to the required operating voltages of various wheel speed sensors.

[0007] Furthermore, the wheel speed sensor detection circuit also includes: a voltage offset module, the input end of the voltage offset module is electrically connected to the output end of the first conversion module, the output end of the voltage offset module is electrically connected to the input end of the second conversion module, the voltage offset module is used to offset the preset voltage signal to obtain an offset voltage signal, and the second conversion module is used to convert the offset voltage signal into a target format signal.

[0008] Furthermore, the second conversion module includes: a voltage comparison module, the input end of the voltage comparison module is electrically connected to the output end of the voltage offset module, the output end of the voltage comparison module is electrically connected to the controller, and the voltage comparison module is used to compare the offset voltage signal with a preset reference voltage to obtain a target format signal.

[0009] Furthermore, the first conversion module includes: a first operational amplifier, the output end of the first operational amplifier is the output end of the first conversion module; a first resistor, the first end of the first resistor is the input end of the first conversion module, and the second end of the first resistor is connected to the first input end of the first operational amplifier; a second resistor, the first end of the second resistor is connected to the first input end of the first operational amplifier, and the second end of the second resistor is connected to the output end of the first operational amplifier; wherein the second input end of the first operational amplifier is grounded.

[0010] Furthermore, the power generation module includes: a second operational amplifier, the output end of the second operational amplifier forms the power supply output end of the power generation module, and the second input end of the second operational amplifier is electrically connected to the output end of the second operational amplifier; an electronic switch, the control signal input end of the electronic switch is electrically connected to the controller, the output end of the electronic switch is electrically connected to the first input end of the second operational amplifier, the first selection input end of the electronic switch is connected to the first power supply, and the second selection input end of the electronic switch is grounded. The electronic switch controls any one of the first selection input end and the second selection input end to be connected to the output end of the electronic switch based on the control signal of the controller.

[0011] Furthermore, the voltage offset module includes: a third operational amplifier, the output end of the third operational amplifier is the output end of the voltage offset module; a third resistor, the first end of the third resistor is the input end of the voltage offset module, and the second end of the third resistor is connected to the first input end of the third operational amplifier; a fourth resistor, the first end of the fourth resistor is connected to the first input end of the third operational amplifier, and the second end of the fourth resistor is connected to the output end of the third operational amplifier; a fifth resistor, the first end of the fifth resistor is connected to the second power supply, and the second end of the fifth resistor is connected to the second input end of the third operational amplifier; and a sixth resistor, the first end of the sixth resistor is connected to the second input end of the third operational amplifier, and the second end of the sixth resistor is grounded.

[0012] Furthermore, the voltage comparison module includes: a comparator, the input end of the comparator is the output end of the voltage comparison module, the first input end of the comparator is the input end of the voltage comparison module, the second input end of the comparator is connected to the third power supply, and the third power supply is used to provide a preset reference voltage.

[0013] Furthermore, the target format signal at least includes a square wave signal.

[0014] According to another aspect of the present invention, a vehicle is provided. The vehicle has a wheel speed sensor detection circuit, and the wheel speed sensor detection circuit is the above-mentioned wheel speed sensor detection circuit.

[0015] By applying the technical solution of the present invention, the wheel speed sensor detection circuit converts the voltage signal or current signal output by the wheel speed sensor into a preset voltage signal through the first conversion module, and further converts it into a target format signal suitable for processing by the controller through the second conversion module, thereby achieving compatible processing of different types of wheel speed sensor signals, solving the problem in the prior art that the wheel speed sensor detection circuit can only process a single type of signal, enhancing the versatility and compatibility of the circuit, and can be widely used in the acquisition and processing of various types of wheel speed signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 A schematic diagram showing the principle of an embodiment of a wheel speed sensor detection circuit according to the present invention is shown;

[0018] Figure 2 shows a schematic structural diagram of an embodiment of a power generation module according to the present invention;

[0019] Figure 3 shows a structural schematic diagram of an embodiment of a first conversion module according to the present invention;

[0020] Figure 4 FIG2 shows a schematic structural diagram of an embodiment of a voltage offset module according to the present invention;

[0021] Figure 5 FIG. 1 is a schematic structural diagram of an embodiment of a voltage comparison module according to the present invention.

[0022] The above drawings include the following reference numerals:

[0023] 10. First conversion module; 101. First operational amplifier; 102. First resistor; 103. Second resistor;

[0024] 20. Second conversion module; 21. Voltage comparison module; 210. Comparator;

[0025] 30. Wheel speed sensor;

[0026] 40. Controller;

[0027] 50. Power generation module; 501. Second operational amplifier; 502. Electronic switch;

[0028] 60. Voltage offset module; 601. Third operational amplifier; 602. Third resistor; 603. Fourth resistor; 604. Fifth resistor; 605. Sixth resistor. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0033] Combine Figures 1 to 5 As shown, according to a specific embodiment of the present application, a wheel speed sensor detection circuit is provided.

[0034] The wheel speed sensor detection circuit includes a first conversion module 10 and a second conversion module 20. The input end of the first conversion module 10 is electrically connected to the wheel speed sensor 30, and the first conversion module 10 is used to convert the output signal of the wheel speed sensor 30 into a preset voltage signal; the input end of the second conversion module 20 is electrically connected to the output end of the first conversion module 10, and the output end of the second conversion module 20 is electrically connected to the controller 40, and the second conversion module 20 is used to convert the preset voltage signal into a target format signal; wherein, the output signal of the wheel speed sensor 30 includes any one of a voltage signal and a current signal.

[0035] By applying the technical solution of this embodiment, the wheel speed sensor detection circuit converts the voltage signal or current signal output by the wheel speed sensor 30 into a preset voltage signal through the first conversion module 10, and further converts it into a target format signal suitable for processing by the controller 40 through the second conversion module 20, thereby achieving compatible processing of different types of wheel speed sensor signals. This solves the problem in the prior art that the wheel speed sensor detection circuit can only process a single type of signal, enhances the versatility and compatibility of the circuit, and can be widely used in the acquisition and processing of various types of wheel speed signals.

[0036] It should be noted that in this embodiment, the wheel speed sensor 30 has different specific types and thus outputs different signal types. For example, the output signal of an active wheel speed sensor is usually a current signal, while the output signal of a passive wheel speed sensor is usually a voltage signal. The first conversion module 10 can adaptively convert the output signal into a preset voltage signal according to the output signal type.

[0037] In this embodiment, the target format signal can be of various formats. The target format signal is primarily used by the controller for analysis to determine the current vehicle wheel speed information. The target format signal generally matches the controller's required signal format. For example, the target format signal can be a PWM (Pulse Width Modulation) signal, a serial communication signal, an FM (Frequency Modulation) signal, or an analog signal.

[0038] Furthermore, the wheel speed sensor detection circuit also includes a power generation module 50, which is used to supply power to the wheel speed sensor 30. The power generation module 50 is electrically connected to the controller 40; wherein, the power generation module 50 has multiple output voltages to adapt to the required operating voltages of various wheel speed sensors 30.

[0039] In this embodiment, the power generation module 50 can provide the most appropriate voltage to the wheel speed sensor 30 according to the instructions of the controller 40, thereby ensuring the accuracy and reliability of the wheel speed sensor 30. The working requirements of the wheel speed sensor 30 in various environments are taken into consideration. For example, by adjusting the power supply voltage under extreme temperatures or when driving at high speeds, the response speed and measurement accuracy of the sensor can be optimized.

[0040] The required operating voltage refers to the supply voltage required for the wheel speed sensor 30 to operate normally. The required operating voltage can be of varying magnitudes and can also include a power supply mode with no output. For example, an active wheel speed sensor requires external power to operate properly, while a passive wheel speed sensor does not. When the wheel speed sensor 30 is a passive wheel speed sensor, the power generation module 50 can directly disconnect the power supply output to the passive wheel speed sensor. Specifically, the power generation module 50 can receive signals from the controller 40 in various ways to determine the output voltage. For example, the power generation module 50 can receive signals from the controller 40 via a wired connection or wirelessly.

[0041] Furthermore, the wheel speed sensor detection circuit also includes a voltage offset module 60, the input end of the voltage offset module 60 is electrically connected to the output end of the first conversion module 10, and the output end of the voltage offset module 60 is electrically connected to the input end of the second conversion module 20. The voltage offset module 60 is used to offset the preset voltage signal to obtain an offset voltage signal, and the second conversion module 20 is used to convert the offset voltage signal into a target format signal.

[0042] In this embodiment, when the baseline of the preset voltage signal is low, signal loss or misjudgment may occur during the conversion process. By adding an offset to the preset voltage signal, the voltage offset module 60 ensures that the signal is accurately captured and recognized during conversion, improving the robustness of signal processing. Even in the event of signal interference or sensor performance degradation, the offset adjustment can compensate, maintaining signal reliability and validity. When sensor aging or vehicle turbulence causes signal fluctuations, the voltage offset module can dynamically adjust the signal to ensure the normal operation of the second conversion module, thereby ensuring the stability and accuracy of the vehicle dynamic control system.

[0043] Among them, the offset applied by the voltage offset module 60 to the preset voltage signal can be determined according to actual needs. For example, the offset can be set to a fixed +2.5V, or a fixed +2.6 or +3.0V. The offset size can also be adjusted in real time according to the size of the preset voltage signal.

[0044] Specifically, the second conversion module 20 includes a voltage comparison module 21, the input end of the voltage comparison module 21 is electrically connected to the output end of the voltage offset module 60, and the output end of the voltage comparison module 21 is electrically connected to the controller 40. The voltage comparison module 21 is used to compare the offset voltage signal with the preset reference voltage to obtain the target format signal.

[0045] In this embodiment, the voltage comparison module 21 evaluates the offset-processed voltage signal and outputs a target format signal based on the comparison result. For example, when the signal exceeds a preset reference voltage, a low level is output; otherwise, a high level is output, thereby forming a square wave signal. This process converts the analog voltage signal into a digital logic signal, making it easier for the controller to understand and process. By precisely setting the preset reference voltage, noise signals are effectively filtered out, retaining only valid wheel speed change information, improving the signal-to-noise ratio and anti-interference capabilities of the signal processing. When the vehicle is traveling at high speed or crawling at low speed, the voltage comparison module 21 can accurately identify wheel speed changes, providing real-time, reliable wheel speed information to anti-lock braking systems, traction control systems, and other systems, significantly enhancing vehicle safety and handling performance under various driving conditions.

[0046] The setting of the preset reference voltage directly affects the signal recognition threshold, thereby determining the sensitivity of the wheel speed change.

[0047] Preferably, if Figure 3 As shown, the first conversion module 10 includes a first operational amplifier 101, a first resistor 102 and a second resistor 103. The output end of the first operational amplifier is the output end of the first conversion module 10; the first end of the first resistor 102 is the input end of the first conversion module 10, and the second end of the first resistor 102 is connected to the first input end of the first operational amplifier 101; the first end of the second resistor 103 is connected to the first input end of the first operational amplifier 101, and the second end of the second resistor 103 is connected to the output end of the first operational amplifier 101; wherein the second input end of the first operational amplifier 101 is grounded.

[0048] In this preferred embodiment, the first conversion module 10 employs an inverting amplifier circuit structure, achieving voltage amplification and impedance matching of the output signal of the wheel speed sensor 30 through the combination of a first operational amplifier 101, a first resistor 102, and a second resistor 103. The gain of the non-inverting amplifier is determined by the ratio of the first resistor 102 to the second resistor 103, which allows for flexible signal conditioning to accommodate the requirements of subsequent processing modules. Furthermore, the grounded second input terminal of the first operational amplifier 101 provides a stable reference point, helping to reduce signal distortion and noise, thereby ensuring the accuracy and stability of signal conversion. When the signal is weak or transmitted over long distances, the first conversion module 10 can effectively enhance the signal and reduce attenuation, providing a high-quality input signal for the entire wheel speed detection system, thereby improving the overall performance and reliability of the system.

[0049] Specifically, when the wheel speed sensor 30 is an active wheel speed sensor, the first resistor 102 is short-circuited, and the current signal output by the active wheel speed sensor is converted into a preset voltage signal through the second resistor 103 and the first operational amplifier 101; when the wheel speed sensor 30 is a passive wheel speed sensor, the voltage signal output by the passive wheel speed sensor is converted into a preset voltage signal through the first resistor 102, the second resistor 103 and the first operational amplifier 101.

[0050] The first input terminal of the first operational amplifier 101 is an inverting input terminal, and the second input terminal is a non-inverting input terminal.

[0051] Preferably, the power generation module 50 includes a second operational amplifier 501 and an electronic switch 502, the output end of the second operational amplifier 501 forms the power supply output end of the power generation module 50, and the second input end of the second operational amplifier 501 is electrically connected to the output end of the second operational amplifier 501; the control signal input end of the electronic switch 502 is electrically connected to the controller 40, the output end of the electronic switch 502 is electrically connected to the first input end of the second operational amplifier 501, the first selection input end of the electronic switch 502 is connected to the first power supply, and the second selection input end of the electronic switch 502 is grounded. The electronic switch 502 controls any one of the first selection input end and the second selection input end to be connected to the output end of the electronic switch 502 based on the control signal of the controller 40.

[0052] In this preferred embodiment, the first selection input of the electronic switch 502 is connected to the first power source, while the second selection input is grounded (i.e., 0V). The electronic switch 502 is electrically connected to the controller 40. This means that the controller 40 can send a control signal based on the type of wheel speed sensor 30 to cause the electronic switch 502 to select the correct input. For active wheel speed sensors, the electronic switch 502 is connected to the first power source, while for passive wheel speed sensors that do not require external power, the electronic switch 502 is connected to ground. This avoids unnecessary power consumption and ensures that the output of the power generation module 50 is adapted to the specific needs of the wheel speed sensor 30. The second operational amplifier 501 stabilizes and amplifies the voltage provided by the electronic switch 502. The output of the second operational amplifier 501 forms the output of the power generation module 50. The connection between the second input of the second operational amplifier 501 and the output of the second operational amplifier 501 forms a feedback loop, ensuring the stability and accuracy of the output voltage, helping to eliminate voltage fluctuations and provide a clean, stable power signal to the wheel speed sensor, ensuring its proper operation.

[0053] like Figure 2 As shown, the first power supply may be a +5 V power supply. The first input terminal of the second operational amplifier 501 is a non-inverting input terminal, and the second input terminal is an inverting input terminal.

[0054] Preferably, the voltage offset module 60 includes a third operational amplifier 601, a third resistor 602, a fourth resistor 603, a fifth resistor 604 and a sixth resistor 605. The output end of the third operational amplifier 601 is the output end of the voltage offset module 60; the first end of the third resistor 602 is the input end of the voltage offset module 60, and the second end of the third resistor 602 is connected to the first input end of the third operational amplifier 601; the first end of the fourth resistor 603 is connected to the first input end of the third operational amplifier 601, and the second end of the fourth resistor 603 is connected to the output end of the third operational amplifier 601; the first end of the fifth resistor 604 is connected to the second power supply, and the second end of the fifth resistor 604 is connected to the second input end of the third operational amplifier 601; the first end of the sixth resistor 605 is connected to the second input end of the third operational amplifier 601, and the second end of the sixth resistor 605 is grounded.

[0055] In this preferred embodiment, the third operational amplifier 601 and four resistors can form a differential amplifier circuit to achieve the purpose of signal amplification and signal offset. The fourth resistor 603 and the sixth resistor 605 have the same resistance value, and the third resistor 602 and the fifth resistor 604 have the same resistance value. By adjusting the ratio of the resistance values ​​of the fourth resistor 603 and the sixth resistor 605 to the third resistor 602 and the fifth resistor 604, the input signal difference (i.e., the difference between the bias voltage provided by the second power supply and the input voltage) can be amplified by a target multiple. The voltage offset module 60 in this embodiment not only performs signal offset, but also amplifies the signal to a certain extent, improving the dynamic range of the signal, making subsequent voltage comparison more sensitive and accurate, while effectively suppressing power supply noise and ground loop interference. In an environment with weak signals or a lot of noise, the voltage offset module 60 can effectively improve signal quality by adjusting the offset and gain, providing more accurate data support for the dynamic control of the vehicle.

[0056] like Figure 4 As shown, the second power supply is used to provide a bias voltage, for example, a bias voltage of +2.5 V. The first input terminal of the third operational amplifier 601 is an inverting input terminal, and the second input terminal is a non-inverting input terminal.

[0057] It should be noted that the voltage offset module 60 in this embodiment may also be configured by using other electrical components (such as resistors, operational amplifiers, voltage followers, capacitors, inductors, etc.) of different numbers and types and in different connection methods to form a circuit with amplification and voltage offset functions to achieve accurate amplification of the input signal. At the same time, based on the specific configuration of the voltage offset module 60, other circuit modules that improve signal quality, such as filtering circuits, may be added on this basis. Preferably, the voltage comparison module 21 includes a comparator 210, wherein the input end of the comparator 210 is the output end of the voltage comparison module 21, the first input end of the comparator 210 is the input end of the voltage comparison module 21, and the second input end of the comparator 210 is connected to a third power supply, which is used to provide a preset reference voltage.

[0058] In this preferred embodiment, the third power supply provides a preset reference voltage. Comparator 210 detects whether the input voltage exceeds or falls below the preset reference voltage and generates a corresponding output signal. The high-speed response of comparator 210 enables it to quickly detect signal changes. During emergency braking or slippery road conditions, voltage comparison module 21 can instantly respond to changes in wheel speed, providing timely information for vehicle anti-skid control, significantly improving vehicle safety in emergency situations.

[0059] like Figure 5As shown, the preset reference voltage can be +2.5V. Specifically, the voltage comparison module 21 converts the continuous voltage signal into a digital signal, typically a square wave signal. When the signal output by the voltage offset module 60 is higher than +2.5V, the comparator 210 outputs a low level, otherwise it outputs a high level. This form of signal is easier for the controller 40 to parse and process. The first input terminal of the comparator 210 is a negative input terminal, and the second input terminal is a positive input terminal.

[0060] Preferably, the target format signal includes at least a square wave signal.

[0061] In this embodiment, the target format signal is preferably a square wave signal. As a typical digital signal, the square wave signal is easy to be recognized and processed by the vehicle controller. By converting the continuously changing voltage signal into a periodic square wave signal, it not only simplifies the signal processing process, but also improves the anti-interference ability of signal transmission. In a complex electromagnetic environment, the use of square wave signals can effectively reduce signal distortion, ensure the stable operation of the vehicle dynamic control system, and provide a strong technical guarantee for the safe driving of modern cars.

[0062] In an optional embodiment of the present application, the second conversion module 20 can also use other components to build a Schmitt trigger to achieve signal conversion while avoiding noise sensitivity problems. Alternatively, the second conversion module 20 can also use an ADC (Analog-to-Digital Converter) in conjunction with a digital comparator structure, and after using the ADC to perform analog-to-digital conversion, use the digital comparator to output a square wave signal.

[0063] It should be noted that the specific structures of the modules in the above embodiments are only examples. In actual applications, the same functions can be achieved by replacing components, changing the connection sequence, or adding, reducing or changing the circuit design.

[0064] According to another specific embodiment of the present application, a vehicle is provided. The vehicle has a wheel speed sensor detection circuit, and the wheel speed sensor detection circuit is the wheel speed sensor detection circuit in the above embodiment.

[0065] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0066] In addition to the above, it should be noted that references to "one embodiment," "another embodiment," "an embodiment," and the like in this specification refer to specific features, structures, or characteristics described in conjunction with that embodiment as included in at least one embodiment generally described in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in conjunction with any embodiment, it is intended that such feature, structure, or characteristic, when implemented in conjunction with other embodiments, also falls within the scope of the present invention.

[0067] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0068] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A wheel speed sensor detection circuit, characterized in that: include: a first conversion module (10), wherein an input end of the first conversion module (10) is electrically connected to a wheel speed sensor (30), and the first conversion module (10) is used to convert an output signal of the wheel speed sensor (30) into a preset voltage signal; a second conversion module (20), wherein an input end of the second conversion module (20) is electrically connected to an output end of the first conversion module (10), an output end of the second conversion module (20) is electrically connected to a controller (40), and the second conversion module (20) is used to convert the preset voltage signal into a target format signal; The output signal of the wheel speed sensor (30) includes any one of a voltage signal and a current signal.

2. The wheel speed sensor detection circuit according to claim 1, characterized in that: The wheel speed sensor detection circuit further includes: a power generation module (50), the power generation module (50) being used to supply power to the wheel speed sensor (30), the power generation module (50) being electrically connected to the controller (40); The power generation module (50) has a variety of output voltages to adapt to the required operating voltages of the various wheel speed sensors (30).

3. The wheel speed sensor detection circuit according to claim 1, characterized in that: The wheel speed sensor detection circuit further includes: A voltage shift module (60), wherein the input end of the voltage shift module (60) is electrically connected to the output end of the first conversion module (10), and the output end of the voltage shift module (60) is electrically connected to the input end of the second conversion module (20), the voltage shift module (60) is used to perform shift processing on the preset voltage signal to obtain a shifted voltage signal, and the second conversion module (20) is used to convert the shifted voltage signal into a target format signal.

4. The wheel speed sensor detection circuit according to claim 3, characterized in that: The second conversion module (20) comprises: A voltage comparison module (21), wherein the input end of the voltage comparison module (21) is electrically connected to the output end of the voltage offset module (60), and the output end of the voltage comparison module (21) is electrically connected to the controller (40), and the voltage comparison module (21) is used to compare the offset voltage signal with a preset reference voltage to obtain the target format signal.

5. The wheel speed sensor detection circuit according to claim 1, characterized in that: The first conversion module (10) comprises: a first operational amplifier (101), wherein an output end of the first operational amplifier (101) is an output end of the first conversion module (10); a first resistor (102), wherein a first end of the first resistor (102) is an input end of the first conversion module (10), and a second end of the first resistor (102) is connected to a first input end of the first operational amplifier (101); a second resistor (103), wherein a first end of the second resistor (103) is connected to a first input end of the first operational amplifier (101), and a second end of the second resistor (103) is connected to an output end of the first operational amplifier (101); Wherein, the second input terminal of the first operational amplifier (101) is grounded.

6. The wheel speed sensor detection circuit according to claim 2, characterized in that: The power generation module (50) comprises: a second operational amplifier (501), wherein the output end of the second operational amplifier (501) forms the power supply output end of the power generation module (50), and the second input end of the second operational amplifier (501) is electrically connected to the output end of the second operational amplifier (501); An electronic switch (502), wherein a control signal input terminal of the electronic switch (502) is electrically connected to the controller (40), an output terminal of the electronic switch (502) is electrically connected to a first input terminal of the second operational amplifier (501), a first selection input terminal of the electronic switch (502) is connected to a first power supply, a second selection input terminal of the electronic switch (502) is grounded, and the electronic switch (502) controls any one of the first selection input terminal and the second selection input terminal to be connected to the output terminal of the electronic switch (502) based on a control signal of the controller (40).

7. The wheel speed sensor detection circuit according to claim 3, characterized in that: The voltage offset module (60) comprises: a third operational amplifier (601), wherein the output end of the third operational amplifier (601) is the output end of the voltage offset module (60); a third resistor (602), wherein a first end of the third resistor (602) is an input end of the voltage offset module (60), and a second end of the third resistor (602) is connected to a first input end of the third operational amplifier (601); a fourth resistor (603), wherein a first end of the fourth resistor (603) is connected to a first input end of the third operational amplifier (601), and a second end of the fourth resistor (603) is connected to an output end of the third operational amplifier (601); a fifth resistor (604), wherein a first end of the fifth resistor (604) is connected to the second power supply, and a second end of the fifth resistor (604) is connected to the second input end of the third operational amplifier (601); A sixth resistor (605), wherein a first end of the sixth resistor (605) is connected to the second input end of the third operational amplifier (601), and a second end of the sixth resistor (605) is grounded.

8. The wheel speed sensor detection circuit according to claim 4, characterized in that: The voltage comparison module (21) comprises: A comparator (210), wherein the output end of the comparator (210) is the output end of the voltage comparison module (21), the first input end of the comparator (210) is the input end of the voltage comparison module (21), and the second input end of the comparator (210) is connected to a third power supply, and the third power supply is used to provide the preset reference voltage.

9. The wheel speed sensor detection circuit according to claim 1, characterized in that: The target format signal at least includes a square wave signal.

10. A vehicle, characterized in that: The vehicle includes a wheel speed sensor detection circuit, and the wheel speed sensor detection circuit is the wheel speed sensor detection circuit according to any one of claims 1 to 9.

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