A method and apparatus for detecting the relative position of a brake pedal and an accelerator pedal

Abstract

This invention discloses a method and apparatus for detecting the relative position of a brake pedal and an accelerator pedal, comprising: applying pressure to the brake pedal using a force-applying plate at a fixed angle relative to the driver's side vehicle floor and capable of simultaneously covering both the brake and accelerator pedals; slowly moving the force-applying plate from its initial position until the brake and accelerator pedals are aligned; collecting the force exerted by the force-applying plate on the brake pedal during the above process, recording the displacement of the force-applying plate, and marking the brake pedal pressure measurement point O on the surface of the force-applying plate; using the force-applying plate as a reference, calculating the dimensions of the accelerator pedal relative to the brake pedal along the X, Y, and Z coordinate axes, as well as the rotation angle φ of the two pedals when pressed, using the displacement of the force-applying plate and point O. This invention can improve work efficiency in vehicle development, especially in the vehicle design stage, allowing for flexible setting of the detection range and rapid, accurate verification of the brake pedal's safe position and pedal force data in small batches to ensure they meet performance design requirements.

Description

Technical Field

[0001] This invention relates to the field of automotive testing technology, specifically to a method and apparatus for detecting the relative positions of a brake pedal and an accelerator pedal. Background Technology

[0002] During the development of different vehicle models, the installation and user comfort of the brake pedal are crucial performance indicators considered in brake performance development. Driving comfort indicators include dimensional data related to the brake pedal's installation position and relative dimensional data of the accelerator pedal, such as vertical and horizontal dimensional differences. They also include pedal force and travel data at the initial pedal press stage. During the vehicle development and verification phase, the corresponding pedal force and dimensional values ​​need to be measured and compared with the set target values ​​to determine whether comfort requirements are met. However, due to the installation position and environment of the brake pedal, related dimensional testing is inconvenient, and ordinary ruler testing lacks precision, resulting in inaccurate test results. The imprecise correlation between pedal force and travel measurements leads to large errors and insufficient accuracy in judging comfort indicators.

[0003] Chinese Patent No. CN213336744U, published on June 1, 2021, discloses a device for testing the travel of an automotive brake pedal. The device includes a base plate, with a first control console fixedly connected to the upper surface of the base plate. The first control console is rotatably connected to a drive wheel, which is driven by a belt. The drive wheel is fixedly connected to one end of a connecting rod. This device, through the cooperation of the brake pedal, connecting rod, first spring, pressure sensing block, and pressure sensor, facilitates the recording of the braking pressure applied to the pedal without manual recording. The device measures the pedal travel using the cooperation of the brake pedal, connecting rod, drive wheel, belt, driven wheel, second bevel gear, screw, moving plate, scale block, and ruler, resulting in small errors and providing accurate analytical data for the test results. A distance display screen allows for more intuitive data recording.

[0004] This patent allows for stroke testing based on the physical dimensions and mechanical structure of the brake pedal. The test stroke result includes the idle travel in the brake pedal design, representing the total displacement of the brake pedal arm. However, different brake pedal manufacturing and installation tolerances can lead to an error of 2-3 mm in the idle travel. Brake pedal performance design verification focuses on the relationship between pedal travel, pedal force, and deceleration after the brake pedal displacement exceeds the idle travel. The test results from this patent do not meet the accuracy requirements for brake pedal performance verification. Summary of the Invention

[0005] In view of the problems existing in the background art, the purpose of the present invention is to provide a convenient and rapid method and device for testing the relative position dimensions of the brake pedal and accelerator pedal, and for monitoring and judging the initial force of the brake pedal.

[0006] To achieve the above objectives, in a first aspect, the method for detecting the relative position of the brake pedal and accelerator pedal designed in this invention includes: applying pressure to the brake pedal using a force-applying plate that is at a fixed angle relative to the driver's side vehicle floor and can simultaneously cover the brake pedal and accelerator pedal; slowly moving the force-applying plate from its initial position until the brake pedal and accelerator pedal are aligned; collecting the force exerted by the force-applying plate on the brake pedal during the above process, recording the displacement of the force-applying plate, and marking the brake pedal pressure measurement position point O on the surface of the force-applying plate;

[0007] Using the force-applying plate as a reference, the displacement of the force-applying plate and point O are used to measure and calculate the dimensions of the accelerator pedal relative to the brake pedal in the X, Y, and Z coordinate axes, as well as the rotation angle φ of the two pedals when they are pressed.

[0008] Secondly, the brake pedal and accelerator pedal relative position detection device designed in this invention includes a size detection device, which includes a force-applying plate that can cover the brake pedal and accelerator pedal. The force-applying plate is held at an angle α with the driver's side vehicle floor by a bracket.

[0009] A first pressure sensor is provided between the back of the force-applying plate and the surface of the brake pedal, and the first pressure sensor is electrically connected to the judgment module; the surface of the force-applying plate is marked with the brake pedal pressure measurement position point O.

[0010] The judgment module determines the initial position of the pressure plate based on the pressure value and records and displays the pressure value of the first pressure sensor;

[0011] Using the force-applying plate as a reference, the displacement of the force-applying plate and point O are used to measure and calculate the dimensions of the accelerator pedal relative to the brake pedal in the X, Y, and Z coordinate axes, as well as the rotation angle φ of the two pedals when they are pressed.

[0012] The beneficial effects of this invention are:

[0013] 1. Improved the detection accuracy of the relative position of the brake pedal and accelerator pedal, ensuring the reliability of the test results.

[0014] 2. Through the design of the force-applying plate and pressure sensor, accurate measurement of the initial force and stroke of the brake pedal was achieved.

[0015] 3. The detection process has been automated and made intelligent. Through real-time feedback from the judgment module, the testing efficiency and convenience have been significantly improved.

[0016] 4. The device has a simple structure and low cost, and is suitable for testing various vehicle models, with broad application prospects.

[0017] This invention can improve work efficiency in vehicle development, especially in the vehicle design phase. It allows for flexible setting of the testing range, enabling rapid and accurate verification of brake pedal safety position and pedal force data in small batches to ensure they meet performance design requirements. It also allows for more efficient and precise convergence of design target values, shortening the verification cycle. Attached Figure Description

[0018] Figure 1 This is a top view schematic diagram of the detection device of the present invention;

[0019] Figure 2 This is a side view schematic diagram of the detection device of the present invention. Detailed Implementation

[0020] The technical solutions (including preferred technical solutions) of the present invention will be further described in detail below with reference to the accompanying drawings and by way of listing some optional embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1 and Figure 2 As shown, the brake pedal and accelerator pedal relative position detection device designed in this invention includes a size detection device. The size detection device includes a force-applying plate 3 that can cover the surfaces of the brake pedal 1 and the accelerator pedal 2. The force-applying plate 3 is held at an angle α with the driver's side vehicle floor by a bracket 4. A first pressure sensor 5 is provided between the back of the force-applying plate 3 and the surface of the brake pedal 1. The first pressure sensor 5 is electrically connected to a judgment module 6. The surface of the force-applying plate 3 is marked with a pressure measurement point O from the brake pedal. The judgment module 6 determines the initial position of the force-applying plate 3 based on the pressure value measured by the first pressure sensor 5 and records and displays the pressure value of the first pressure sensor 5.

[0022] Using the force-applying plate 5 as a reference, the displacement of the force-applying plate 5 and point O are used to measure and calculate the dimensions of the accelerator pedal 2 relative to the brake pedal 1 in the X, Y, and Z coordinate axes, as well as the rotation angle φ of the two pedals when they are pressed.

[0023] In some optional embodiments of the present invention, the judgment module 6 determines the brake pedal stroke based on the preset brake pedal force-stroke curve relationship, and determines whether the brake pedal comfort meets the design requirements based on the preset pedal force and brake pedal stroke range requirements.

[0024] In some alternative embodiments of the invention, the α angle is consistent with the angle range of the brake pedal design in the vehicle model database.

[0025] In some optional embodiments of the present invention, the moving force-applying plate 3, when the pressure F of the first pressure sensor 5 is 0 < F ≤ 1 N, the judgment module 6 determines that the size detection device is in the initial position.

[0026] In some optional embodiments of the present invention, the force-applying plate is provided with an accelerator pedal observation window, through which the relative positions of the brake pedal and the accelerator pedal are determined.

[0027] In some optional embodiments of the present invention, a second pressure sensor is provided next to the observation window and on the back of the force-applying plate. When the second pressure sensor detects pressure F', it is determined that the brake pedal and the accelerator pedal are aligned. Preferably, 0 < F' ≤ 1 N.

[0028] The method for detecting the relative position of the brake pedal and accelerator pedal designed in this invention includes: applying pressure to the brake pedal 1 using a force-applying plate 3 that is at a fixed angle relative to the driver's side vehicle floor and can simultaneously cover the brake pedal 1 and the accelerator pedal 2; slowly moving the force-applying plate 3 from its initial position until the brake pedal 1 and the accelerator pedal 2 are aligned; collecting the force exerted by the force-applying plate 3 on the brake pedal 1 during the above process, recording the displacement of the force-applying plate 3, and marking the brake pedal 1 pressure measurement position point O on the surface of the force-applying plate 3;

[0029] Using the force-applying plate 3 as a reference, the displacement of the force-applying plate 3 and point O are used to measure and calculate the dimensions of the accelerator pedal 2 relative to the brake pedal 1 in the X, Y, and Z coordinate axes, as well as the rotation angle φ of the two pedals when they are pressed.

[0030] In some optional embodiments of the present invention, the force-applying plate 3 is moved, and when the pressure F between the force-applying plate 3 and the brake pedal 1 is 0 < F ≤ 1 N, it is determined that the force-applying plate 3 is in the initial position.

[0031] In some optional embodiments of the present invention, the brake pedal travel is calculated based on a preset brake pedal force-travel curve relationship, and the brake pedal comfort is determined to meet the design requirements based on preset pedal force and brake pedal travel range requirements.

[0032] In some optional embodiments of the present invention, an accelerator pedal observation window 8 is provided on the force-applying plate 3, and the brake pedal 1 and the accelerator pedal 2 are judged to be flush through the observation window 8.

[0033] In some optional embodiments of the present invention, a second pressure sensor 7 is provided next to the observation window 8 and on the back of the force-applying plate 3. When the second pressure sensor 7 detects pressure F', it is determined that the brake pedal and the accelerator pedal are aligned. Preferably, 0 < F' ≤ 1N.

[0034] The following describes a specific embodiment of the brake pedal and accelerator pedal relative position detection method designed in this invention, which specifically includes the following steps:

[0035] S1, the vehicle is started, shifted into neutral, and is in idle state. The first pressure sensor is mounted on the center of the brake pedal surface.

[0036] S2, place the force application plate on the driver's side vehicle floor, ensuring that the back of the force application plate is in contact with the brake pedal surface, adjust the position of the force application plate, and ensure that the pressure F of the first pressure sensor is 0 < F ≤ 1N, and determine that the force application plate is in the initial position.

[0037] S3, mark the measurement point O of the first pressure sensor on the surface of the force-applying plate, and slowly move the force-applying plate from the initial position until the brake pedal and accelerator pedal are aligned.

[0038] S4. Calculate the dimensions of the accelerator pedal relative to the brake pedal in the X, Y, and Z coordinate axes, as well as the rotation angle φ of the two pedals, by measuring the displacement of the force-applying plate and point O.

[0039] S5: During the movement of the applied plate, the pressure of the first pressure sensor is collected, the brake pedal stroke is calculated according to the preset brake pedal force-stroke curve relationship, and the brake pedal comfort is determined according to the preset pedal force and brake pedal stroke range requirements.

[0040] The following describes another specific embodiment of the brake pedal and accelerator pedal relative position detection method designed in this invention, which specifically includes the following steps:

[0041] Step 1: Start the vehicle, shift to neutral (N), and let it idle.

[0042] Step 2: Install the first pressure sensor in the center of the brake pedal surface, place the size detection device on the driver's side vehicle floor, and make the brake pedal surface and the inner side of the size detection device contact each other as shown in the top view;

[0043] Step 3: Connect the signal from the first pressure sensor 5 to the judgment module 6. The judgment module 6 can have a built-in voice output module for the judgment result. Turn on the power to the judgment module 6. At this time, the display interface should show a change in force value. Adjust the position of the size detection device to ensure that the force value on the display interface is ≤1N. Determine that the size detection device is in the initial position of the brake pedal. Proceed to the next test.

[0044] Step 4: From the top view, you can see the relative position of the accelerator pedal to the brake pedal. Generally, the accelerator pedal is lower than the inclined surface of the force application plate 3. Using the force application plate 3 as a reference, mark the measurement position points on the surface of the force application plate 3 with a pen, and measure the dimensions of the accelerator pedal relative to the brake pedal in the X, Y, and Z coordinate axes, including the rotation angle φ.

[0045] Step 5: Confirm that the power supply to the judgment module 6 is working properly, and then judge the brake pedal force comfort. The specific judgment process is as follows:

[0046] The size detection device is slowly moved forward 10-15mm on the driver's side floor of the vehicle. During this movement, the first pressure sensor 5 collects the pressure value generated by the pedal contact surface. The pressure value is input to the judgment module 6, which calculates the corresponding travel of the brake pedal 1 based on a preset pedal force-travel curve. It can then determine whether the brake pedal meets the preset requirements for pedal force and travel range. If it does, the device issues a voice message saying "Setting requirements met"; otherwise, it issues a voice signal saying "Setting requirements not met, pedal force too high / too low". Simultaneously, the judgment module 6 has an LCD screen that can display the corresponding pedal force (N) and travel value (mm) at any given moment in real time. This allows for quick and convenient reading and recording.

[0047] It will be readily understood by those skilled in the art that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, combinations, substitutions, improvements, etc., made under the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A method for detecting the relative position of a brake pedal and an accelerator pedal, characterized in that, include: A pressure plate that is at a fixed angle to the driver's side floor plate and can simultaneously cover the brake pedal and accelerator pedal is used to apply pressure to the brake pedal. Slowly move the force-applying plate from its initial position until the brake pedal and accelerator pedal are aligned; collect the force exerted by the force-applying plate on the brake pedal during the process of applying pressure to the brake pedal and during the process of moving the force-applying plate until the brake pedal and accelerator pedal are aligned, record the displacement of the force-applying plate, and mark the brake pedal pressure measurement position point O on the surface of the force-applying plate. Using the force-applying plate as a reference, the displacement of the force-applying plate and point O are used to measure and calculate the dimensions of the accelerator pedal relative to the brake pedal in the X, Y, and Z coordinate axes, as well as the rotation angle of the two pedals when pressed.

2. The method for detecting the relative position of the brake pedal and accelerator pedal according to claim 1, characterized in that, Its characteristics are: Move the force-applying plate. When the pressure F between the force-applying plate and the brake pedal is 0 < F ≤ 1 N, the force-applying plate is determined to be in its initial position.

3. The method for detecting the relative position of the brake pedal and accelerator pedal according to claim 1, characterized in that, The brake pedal travel is calculated based on the preset brake pedal force-travel curve relationship. Based on the preset pedal force and brake pedal travel range requirements, it is determined whether the brake pedal comfort meets the design requirements.

4. The method for detecting the relative position of the brake pedal and accelerator pedal according to claim 1, characterized in that, An observation window for the accelerator pedal is provided on the force-applying plate to determine whether the brake pedal and accelerator pedal are level.

5. The method for detecting the relative position of the brake pedal and accelerator pedal according to claim 4, characterized in that, A second pressure sensor is located next to the observation window and on the back of the force-applying plate. When the second pressure sensor detects pressure, it determines that the brake pedal and the accelerator pedal are aligned.

6. The method for detecting the relative position of the brake pedal and accelerator pedal according to any one of claims 1 to 5, characterized in that, The detection method includes the following steps: S1, the vehicle is started, shifted into neutral, and is in idle state. The first pressure sensor is mounted on the center of the brake pedal surface. S2, place the force application plate on the driver's side vehicle floor, ensuring that the back of the force application plate is in contact with the brake pedal surface, adjust the position of the force application plate, and ensure that the pressure F of the first pressure sensor is 0 < F ≤ 1N, and determine that the force application plate is in the initial position. S3, mark the measurement point O of the first pressure sensor on the surface of the force-applying plate, and slowly move the force-applying plate from the initial position until the brake pedal and accelerator pedal are aligned. S4, using the displacement of the force-applying plate and point O, calculates the dimensions of the accelerator pedal relative to the brake pedal along the X, Y, and Z axes, as well as the rotation angle when both pedals are depressed.

7. The method for detecting the relative position of the brake pedal and accelerator pedal according to claim 6, characterized in that, The detection method further includes: S5: During the movement of the applied plate, the pressure of the first pressure sensor is collected, the brake pedal stroke is calculated according to the preset brake pedal force-stroke curve relationship, and the brake pedal comfort is determined according to the preset pedal force and brake pedal stroke range requirements.

8. A brake pedal and accelerator pedal relative position detection device using the detection method described in any one of claims 1 to 7, characterized in that: The device includes a size detection device, which includes a force-applying plate that covers the brake pedal and the accelerator pedal. The force-applying plate is held at an angle α with the driver's side vehicle floor by a bracket. A first pressure sensor is provided between the back of the force-applying plate and the surface of the brake pedal, and the first pressure sensor is electrically connected to the judgment module; the surface of the force-applying plate is marked with the brake pedal pressure measurement position point O. The judgment module determines the initial position of the pressure plate based on the pressure value and records and displays the pressure value of the first pressure sensor; Using the force-applying plate as a reference, the displacement of the force-applying plate and point O are used to measure and calculate the dimensions of the accelerator pedal relative to the brake pedal in the X, Y, and Z coordinate axes, as well as the rotation angle of the two pedals when pressed.

9. The brake pedal and accelerator pedal relative position detection device according to claim 8, characterized in that: The α angle is consistent with the angle range of the brake pedal design in the vehicle model database; when the pressure F of the first pressure sensor is 0 < F ≤ 1 N, the judgment module determines that the size detection device is in the initial position.

10. The brake pedal and accelerator pedal relative position detection device according to claim 8 or 9, characterized in that: The force-applying plate is equipped with an accelerator pedal observation window, through which the relative positions of the brake pedal and the accelerator pedal are determined; a second pressure sensor is provided next to the observation window and located on the back of the force-applying plate. When the second pressure sensor detects pressure F', it is determined that the brake pedal and the accelerator pedal are aligned, 0 < F' ≤ 1N.

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