Electronic brake pedal structure and signal verification device

Abstract

The utility model relates to the field of brake-by-wire systems, in particular to an electronic brake pedal structure and a signal verification device, which comprise a base and a pedal arm, and the base is rotatably connected with the pedal arm; a sensor is arranged on the base, when the pedal arm rotates, the sensor can generate induction, then an ascending or descending signal is generated, and the signal generated by the sensor is a linear change signal; a signal switch is arranged between the base and the pedal arm, the pedal arm triggers the signal switch when rotating, and the signal switch is a jump signal. According to the utility model, the signal switch is arranged on the pedal, the signal switch generates signals in a pure mechanical manner, the voltage amplitude of the signal switch is high and is generally equal to or slightly smaller than the power supply voltage of an automobile battery, the anti-interference capability is strong, the reliability of the pedal signal is improved in the verification of the pedal signal, and some common cause failures of an electronic signal are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of a wire control braking system, in particular to an electronic brake pedal structure and a signal verification device. Background Art

[0002] In the field of wire control braking systems, the dynamic safety of vehicles is a very critical issue. Especially in an electro-mechanical braking system (EMB), since the brake pedal is completely decoupled from the vehicle's entire braking system, safety has received more attention. Once the electronic signal of the brake pedal fails, serious consequences will occur. Therefore, the electronic brake pedal not only adopts a multi-channel signal redundancy design but also requires multiple verifications to enhance the reliability of the signal.

[0003] The signals of existing electronic brake pedals are verified by each other among multiple channels (usually four or six channels). However, in some extreme environments or harsh working conditions, relying on the electronic signals of existing sensors, the credibility of the signals cannot be confirmed even by the mutual verification of four or six channels. Therefore, how to further enhance the reliability of the electronic brake pedal signals and avoid sensor failures in extreme environments is an issue that needs to be considered by those skilled in the art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an electronic brake pedal structure and a signal verification device to solve problems such as the unreliability of brake sensor signals in extreme environments in the prior art.

[0005] The technical solution of the utility model is: an electronic brake pedal structure and a signal verification device, including a base and a pedal arm, wherein the base and the pedal arm are rotatably connected; a sensor is arranged on the base. When the pedal arm rotates, the sensor can generate an induction and then generate an up or down signal, and the signal generated by the sensor is a linearly changing signal.

[0006] A signal switch is arranged between the base and the pedal arm. When the pedal arm rotates, the signal switch is triggered, and the signal switch is a jump signal.

[0007] Preferably, at least two sensors are arranged, and the sensors are independently arranged and mutually verified.

[0008] Preferably, the base includes a bottom plate and a bracket, and one end of the pedal arm is rotatably connected to the bracket; a resistance device is connected to the bottom plate, and the end of the resistance device away from the bottom plate is connected to the pedal arm.

[0009] Preferably, the sensor is connected to the side of the bracket, and an induction block that can be inducted by the sensor is arranged on the pedal arm; when the pedal arm rotates, the induction block is driven to rotate, and the sensor can sense the rotation change of the induction block.

[0010] Preferably, the signal switch is arranged on the bottom plate, and one end far away from the bottom plate is connected to the pedal arm; when braking, the pedal arm rotates, approaches and presses against the signal switch to generate a signal.

[0011] Preferably, the signal switch is arranged on the bracket, and one end far away from the bracket is connected to the pedal arm; when braking, the pedal arm rotates, disengages from the signal switch to generate a signal.

[0012] Compared with the prior art, the advantages of the present utility model are as follows:

[0013] (1) In the present utility model, a signal switch is installed on the pedal and the signal switch generates a signal in a pure mechanical manner, with a high voltage amplitude, generally equal to or slightly less than the supply voltage of the vehicle battery, and strong anti-interference ability. Applying this signal to the verification of the pedal signal improves the reliability of the pedal signal and avoids certain common cause failures of electronic signals, which may affect the braking of the braking system.

[0014] (2) The signal switch of the original brake light on the vehicle can also be combined with the signal switch described in the present utility model to verify the electronic signal of the sensor with the signal switch of the brake light, further reducing the hardware cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0016] Figure 1 It is a schematic diagram of the signal change when the pedal stroke of the present utility model changes;

[0017] Figure 2 It is a schematic diagram of the structure of the electronic brake pedal and the signal verification device of the present utility model.

[0018] Wherein: base 1, bottom plate 11, bracket 12, pedal arm 2, pedal 21, sensor 3, signal switch 4. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The content of the present utility model will be further described in detail below in conjunction with specific embodiments:

[0020] Such as Figure 1 - Figure 2As shown, the utility model is applied to the electro-mechanical braking system of an automobile. In a decoupled braking system, the brake actuator performs a braking action according to the electronic signal generated when the brake pedal is stepped on. Once the electronic signal fails, serious accidents may occur. Therefore, multiple sensors need to be set on the brake pedal to increase the reliability of the signal. However, in some special working conditions, the electronic signal may fail due to some common cause failures. Therefore, in the present utility model, a mechanical signal switch is introduced into the braking system to further verify the signal of the sensor, so as to increase the reliability of the signal.

[0021] Specifically, an electronic brake pedal structure and a signal verification device include a base 1 and a pedal arm 2, and the base 1 is rotatably connected to the pedal arm 2; a sensor 3 is arranged on the base 1. When the pedal arm 2 rotates, the sensor 3 can sense and generate an induction, and then generate a rising or falling signal. The signal generated by the sensor 3 is a linearly varying signal.

[0022] The base 1 includes a bottom plate 11 and a bracket 12. One end of the pedal arm 2 is rotatably connected to the bracket 12, and the other end is provided with a pedal 21. A resistance device (not shown in the figure) is connected to the bottom plate 11. The end of the resistance device away from the bottom plate 11 is connected to the pedal arm 2. When the pedal is stepped on, the resistance device is compressed. When the pedal is released, the resistance device rebounds, causing the pedal and the pedal arm 2 to return to their original positions. The sensor 3 is connected to the side of the bracket 12, and an induction block (not shown in the figure) that can interact with the sensor 3 is arranged on the pedal arm 2.

[0023] In this embodiment, multiple sensors 3 can be arranged. The multiple sensors 3 are all independently arranged and independently sense the corresponding induction blocks. When braking, when the pedal is stepped on and the pedal arm 2 rotates, it drives the induction block to rotate. The sensor 3 can sense the rotation change of the induction block, and the multiple sensors 3 respectively output electronic signals. Under normal circumstances, the electronic signals output by the multiple sensors 3 are the same; when one or some of the sensors 3 fail, the braking action can still be normally performed. However, when all the sensors 3 fail, the braking fails. It should be noted that the signal output by the sensor 3 is linear, that is, as the pedal stroke changes, it changes linearly in a certain proportion synchronously, and the output signal gradually rises or falls (as Figure 1 shown).

[0024] A signal switch 4 is arranged between the base 1 and the pedal arm 2. When the pedal arm 2 rotates, it triggers the signal switch 4, and the signal switch 4 is a jump signal. In this embodiment, the signal switch is arranged on the bottom plate 11, and the end away from the bottom plate 11 is connected to the pedal arm 2; when braking, the pedal arm 2 rotates, approaches and presses against the signal switch, generating a signal. The signal switch is mechanical. When the pedal steps on and touches the signal switch, the signal switch is triggered and the signal jumps, that is, the signal generated by the signal switch is triggered when the pedal is stepped on to a certain stroke, asFigure 1 As shown, when the pedal stroke reaches point A, the signal switch jumps, and the voltage state after the jump is maintained. When the pedal signal jitters abnormally or the vehicle's braking system has an unexpected excessive braking fault, the system can determine whether the brake pedal is depressed through the signal output by the signal switch, and further implement the braking system's degradation strategy. At the same time, when the pedal moves to point A of the stroke, there is a fixed corresponding relationship with point B of the switch signal trigger point. Using this fixed corresponding relationship, the credibility of the pedal signal can be diagnosed. Each signal output by each sensor 3 has a corresponding relationship as shown in the following text. Therefore, each signal path can be verified using the above verification method to improve the reliability of the pedal sensor 3 signal. Figure 1 As shown, there is such a corresponding relationship. Therefore, each signal path can be verified using the above verification method to improve the reliability of the pedal sensor 3 signal.

[0025] In addition, the signal switch can be combined with the vehicle's brake light signal switch. Using the original brake light signal switch on the vehicle for verification can achieve the purpose of further increasing the reliability of the brake signal without increasing the hardware cost.

[0026] In other embodiments, the signal switch can be set on the bracket 12, and the end far from the bracket 12 is connected to the pedal arm 2. When braking, the pedal arm 2 rotates, disengages from the signal switch, and generates a signal.

[0027] The above embodiments are only used to illustrate the technical concept and features of the present invention. The purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. An electronic brake pedal structure and signal verification device, characterized in that: It includes a base and a pedal arm, and the base is rotatably connected to the pedal arm; a sensor is provided on the base. When the pedal arm rotates, the sensor can sense and generate an induction, thereby generating a rising or falling signal, and the signal generated by the sensor is a linearly changing signal; A signal switch is provided between the base and the pedal arm. When the pedal arm rotates, the signal switch is triggered, and the signal switch is a jump signal; When braking, the signal switch is triggered to verify the reliability of the signal output by the sensor.

2. The electronic brake pedal structure and signal verification device according to claim 1, characterized in that: At least two sensors are provided, and the sensors are independently arranged from each other and are mutually verified.

3. The electronic brake pedal structure and signal verification device according to claim 1, characterized in that: The base includes a bottom plate and a bracket, and one end of the pedal arm is rotatably connected to the bracket; a resistance device is connected to the bottom plate, and the end of the resistance device away from the bottom plate is connected to the pedal arm.

4. The electronic brake pedal structure and signal verification device according to claim 3, characterized in that: The sensor is connected to the side of the bracket, and an induction block that can be inducted by the sensor is provided on the pedal arm; when the pedal arm rotates, it drives the induction block to rotate, and the sensor can sense the rotation change of the induction block.

5. An electronic brake pedal structure and signal verification device according to claim 1, characterized in that: The signal switch is provided on the bottom plate, and the end away from the bottom plate is connected to the pedal arm; when braking, the pedal arm rotates, approaches and presses against the signal switch to generate a signal.

6. The electronic brake pedal structure and signal verification device according to claim 1, wherein: The signal switch is provided on the bracket, and the end away from the bracket is connected to the pedal arm; when braking, the pedal arm rotates, disengages from the signal switch, and generates a signal.

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