A device for testing the stroke of an automobile pedal

Abstract

The application discloses a kind of automobile pedal stroke test devices, it is related to automobile test technical field, including pedal support, base, sliding frame and rack, sliding frame is installed at the top of base;Rack is slidably installed in sliding frame;Mounting table and gear disc, mounting table is installed in the side wall of sliding frame, gear disc is installed in the side away from sliding frame of mounting table;Spiral strip is installed in the side of gear disc close to mounting table, and spiral strip is engaged with rack;Scale plate is installed at the top of sliding frame, and stroke line for measuring the displacement of rack is formed on scale plate, and the top of rack is fixedly connected with indicating plate;Gear disc edge is formed with angle line for measuring the rotation angle of gear disc, and indicating needle is erected on the side of sliding frame close to gear disc;It further includes transmission assembly for driving gear disc to rotate synchronously with automobile pedal and retaining stroke test results.The design of gear disc and rack can measure the rotation stroke and movement stroke of automobile pedal simultaneously, and improve the accuracy of test results.

Description

Technical Field

[0001] This invention relates to the field of automotive testing technology, and more specifically to a device for testing the travel of automotive pedals. Background Technology

[0002] Automotive pedals (including the brake pedal, accelerator pedal, and clutch pedal) are core components for the interaction between the driver and the vehicle control system, and their performance directly affects driving comfort, safety, and overall vehicle handling. The appropriateness of pedal travel and operating force determines the vehicle's response characteristics. For example, the relationship between the brake pedal travel and braking force affects emergency braking effectiveness, the linearity of the accelerator pedal affects acceleration smoothness, and the clutch pedal engagement point affects gear shifting smoothness. Therefore, accurate testing of pedal travel, force, and their dynamic characteristics is crucial.

[0003] Existing travel testing devices mainly rely on various electronic sensors (such as displacement sensors and angle sensors) to monitor the travel of car pedals. By analyzing the positional changes of the car pedal's initial position and final position after being pressed using displacement sensors, the linear travel of the car pedal can be detected. By analyzing the angular changes of the car pedal's initial position and final position after being pressed using angle sensors, the rotational travel of the car pedal can be detected, thus realizing the travel testing function of the car pedal.

[0004] The measurement accuracy of electronic sensors is easily affected by factors such as usage frequency, device precision, and electromagnetic interference, leading to errors in test results. Existing stroke testing devices rely solely on electronic sensors for testing, lacking reliable mechanical measurement structures to assist in verifying the test results, resulting in low reliability. Therefore, it is necessary to propose an automotive pedal stroke testing device that can verify test results using mechanical measurements while simultaneously utilizing electronic sensors. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an automotive pedal travel testing device. Through the design of a gear disk and rack, the gear disk can be driven to rotate synchronously with the automotive pedal, and the rack can be driven to slide. Based on the rotation angle of the gear disk and the sliding amount of the rack, the rotational travel and movement travel of the automotive pedal are calculated, thereby realizing the mechanical measurement of the automotive pedal travel. The results are then compared with electronic measurement results to improve the accuracy of the test results.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A vehicle pedal travel testing device for testing the travel of a vehicle pedal, comprising a pedal bracket connected to the vehicle pedal, and further comprising: a base, a sliding frame, and a rack, wherein the sliding frame is mounted on the top of the base; the rack is vertically slidably mounted within the sliding frame, and the teeth on the rack extend out of the sliding frame; a mounting platform and a gear disk, wherein the mounting platform is mounted on one side wall of the sliding frame, and the gear disk is mounted on the side of the mounting platform away from the sliding frame; a spiral strip is fixedly connected to the side of the gear disk near the mounting platform, and the spiral strip meshes with the rack; a scale plate is mounted on the end of the sliding frame away from the base; a travel line for measuring the rack displacement is formed on the scale plate, and an indicator plate is fixedly connected to the top of the rack, wherein the rack displacement can be obtained by observing the position of the indicator plate corresponding to the travel line; an angle line for measuring the gear disk rotation angle is formed on the edge of the gear disk, and an indicator needle is fixedly mounted on the side of the sliding frame near the gear disk, wherein the gear disk rotation angle can be obtained by observing the position of the indicator needle corresponding to the angle line; and a transmission assembly, wherein the transmission assembly is respectively connected to the vehicle pedal and the gear disk, for driving the gear disk to rotate synchronously with the vehicle pedal and retaining the travel test results.

[0007] The technical principles of the above solution are as follows:

[0008] When the car pedal is turned, the transmission components connected to the car pedal and the gear disk respectively will drive the gear disk to rotate synchronously with the car pedal. At this time, the angle line pointed to by the indicator needle is the angle of rotation of the gear disk, and the rotation stroke of the car pedal can be calculated according to the geometric relationship. When the gear disk rotates, since the auger and the rack mesh, and the rack slides vertically with the sliding frame, the rotation of the auger will drive the rack to slide vertically along the sliding frame. At this time, the stroke line pointed to by the indicator is the movement stroke of the rack, and the movement stroke of the car pedal can be calculated according to the geometric relationship.

[0009] When the operator releases the pedal, the rack and pinion will remain stationary, thus preserving the test results.

[0010] The above approach has the following beneficial effects:

[0011] 1. Existing stroke testing devices rely solely on electronic sensors for testing, lacking reliable mechanical measurement structures to assist in verifying the test results, resulting in low reliability. This solution, through the design of a gear disk and rack, can effectively measure the rotation angle and displacement of the car pedal through mechanical transmission. Since the gear disk rotates synchronously with the car pedal, the rotation angle of the gear disk is equal to the rotation angle of the car pedal. Furthermore, since the rotation angle of the gear disk is proportional to the displacement of the rack, and the rotation angle of the gear disk is equal to the rotation angle of the car pedal, the displacement of the rack is also proportional to the displacement of the car pedal, thus effectively realizing the mechanical measurement of the rotation angle and displacement of the car pedal.

[0012] 2. Existing stroke testing devices require the use of different equipment or sensors to measure the rotation angle and displacement of the car pedal separately. This solution, through the design of a gear plate and rack, can simultaneously measure the rotation angle and displacement of the car pedal, eliminating the need for two separate sets of equipment. This effectively improves testing efficiency and reduces testing costs and complexity.

[0013] 3. Existing testing devices, such as rope-pulling testing devices or dimensional measuring devices, cause the test results to disappear immediately after the tester releases the car pedal. This requires the tester to observe the test data while pressing the car pedal, necessitating timely observation. Furthermore, physical obstruction during observation can make the process inconvenient. In this solution, the gear plate and rack do not automatically reset after the pedal is reset. The tester does not need to continuously press the car pedal, and the device automatically retains the test results, facilitating observation by the operator.

[0014] Furthermore, the transmission assembly includes a rotating platform, a placement frame, a telescopic rod, and parallel rods. The rotating platform is rotatably connected to the gear disk on the same axis. A pawl is hinged to the outer wall of the rotating platform, and the end of the pawl away from the rotating platform meshes with the gear disk so that the gear disk can rotate with the rotating platform. A telescopic rod is also installed on the side wall of the rotating platform. Several parallel rods are hinged to the side of the telescopic rod away from the rotating platform, and the end of each parallel rod away from the telescopic rod is hinged to the placement frame. The telescopic rod is arranged parallel to the placement frame.

[0015] Based on the aforementioned technical means, the design of the ratchet allows for the retention of test results, improving the convenience of observing test results.

[0016] Furthermore, the ratio of the displacement of the telescopic rod during rotation to the displacement of the rack during vertical sliding is set as a proportionality coefficient, with the proportionality coefficient ranging from 1 to 5.

[0017] Based on the aforementioned technical means, testers can quickly calculate the displacement of the car pedal according to the proportional coefficient and the displacement when the rack slides vertically.

[0018] Furthermore, it also includes a fixing component for fixing car pedals of different sizes within the placement frame; the fixing component includes a controller and an electronically controlled cylinder mounted on the inner wall of the placement frame, with a fixing plate fixedly connected to the output shaft of the electronically controlled cylinder; the controller is used to control the operation of the electronically controlled cylinder to adjust the position of the fixing plate.

[0019] Based on the above technical means, the design of the placement frame and the fixing plate makes the placement frame suitable for different sizes of car pedals, further making the device suitable for different sizes of car pedals, thus improving the practicality and applicability of the device.

[0020] Furthermore, the bottom of the placement frame is provided with a clearance groove for the lateral sliding of the pedal bracket.

[0021] Based on the above technical means, the clearance groove can prevent the placement frame from obstructing the pedal bracket, thus preventing the placement frame from fixing the car pedal.

[0022] Furthermore, the top of the scale plate is provided with a recognition component for acquiring images of the indicator plate and the indicator needle; the recognition component includes an image recognizer fixedly connected to the top of the scale plate, and the image recognizer is controlled by the controller so that the controller can control the operation of the image recognizer.

[0023] Based on the aforementioned technical means, the image recognition device can effectively acquire images of the indicator board and indicator needle, thereby facilitating subsequent analysis of the displacement and rotation angle of the car pedal, improving the automation level of the device and the accuracy of data processing.

[0024] Furthermore, the placement frame is equipped with an electronic detection component for measuring the displacement, rotation angle, and pressure value of the placement frame. The electronic detection component includes a displacement sensor, an angle sensor, and a pressure sensor installed inside the placement frame.

[0025] Based on the above technical means, since the placement frame rotates synchronously with the car pedal and the placement frame is subjected to pressure instead of the car pedal, the displacement and rotation angle of the placement frame are the same as those of the car pedal, and the pressure on the placement frame is equivalent to the pressure on the car pedal. This solution collects the displacement, rotation angle and pressure of the placement frame through displacement sensors, angle sensors and pressure sensors, and can analyze various data of the car pedal, thereby improving the accuracy and convenience of measurement.

[0026] Furthermore, it also includes a comprehensive analysis system, which comprises a displacement analysis module, an angle analysis module, and a mechanical monitoring module.

[0027] The displacement analysis module receives the displacement of the car pedal collected by the displacement sensor to obtain a first displacement; it also collects the indicator image recognized by the image recognizer, analyzes the indicator image, subtracts the error value between the car pedal and rack displacement from the value currently indicated by the indicator, obtains the current rack displacement, and calculates the car pedal displacement based on the proportional coefficient to obtain a second displacement; it also sets a displacement threshold, obtains the actual displacement difference based on the difference between the first and second displacements, and judges the reliability of the first displacement based on the actual displacement difference and the displacement threshold; when the actual displacement difference is less than the displacement threshold, the displacement analysis module judges the first displacement to be reliable; when the actual displacement difference is greater than the displacement threshold, the displacement analysis module judges the second displacement to be reliable and issues a displacement sensor calibration reminder.

[0028] The angle analysis module receives the rotation angle of the car pedal from the angle sensor to obtain a first rotation angle; it also collects the pointer image recognized by the image recognizer, analyzes the current pointer value based on the pointer image to obtain the current rotation angle of the gear disk, and analyzes the rotation angle of the car pedal by subtracting the error value of the displacement between the car pedal and the rack from the current rotation angle of the gear disk to obtain a second rotation angle; it also sets a rotation threshold, calculates the difference between the first and second rotation angles to obtain the actual rotation difference, and judges the reliability of the first rotation angle based on the actual rotation difference and the rotation threshold; when the actual rotation difference is less than the rotation threshold, the angle analysis module judges the first rotation angle to be reliable; when the actual rotation difference is greater than the rotation threshold, the angle analysis module judges the second rotation angle to be reliable and issues an angle sensor calibration reminder.

[0029] The mechanical monitoring module is used to receive the pressure value of the placement frame collected by the pressure sensor, analyze the pressure value of the car pedal based on the pressure value of the placement frame, and obtain the pressure detection value.

[0030] Furthermore, the formula for calculating the second displacement is as follows:

[0031] .

[0032] Where K is the proportionality coefficient, L0 is the current displacement of the rack, and L2 is the second displacement.

[0033] Furthermore, a piston chamber is opened inside the base, and a piston plate is vertically slidably fitted inside the piston chamber; the bottom of the rack extends into the piston chamber and is fixedly connected to the top of the piston plate; and several adsorption holes are opened at the bottom of the base.

[0034] Based on the above technical means, this solution uses the design of adsorption holes to further fix the device to the car, thereby improving the stability of the device.

[0035] Beneficial effects: Existing stroke testing devices rely solely on electronic sensors for testing, lacking reliable mechanical measurement structures to assist in verifying the test results. This solution compares and analyzes the data measured by electronic sensors with the data measured and calculated by mechanical means, using the test results of mechanical measurements to assist in judging the test results measured by electronic sensors, thereby improving the accuracy and reliability of the test.

[0036] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0037] Figure 1 This is an isometric view of the overall structure of the automobile pedal travel testing device of the present invention.

[0038] Figure 2 This is a front view of the overall structure of the automobile pedal travel testing device of the present invention connected to the automobile pedal.

[0039] Figure 3 This is a partial structural side view of the automobile pedal travel testing device of the present invention.

[0040] Figure 4 This is a schematic diagram of the structure of the gear disk with a spiral strip installed according to the present invention.

[0041] Figure 5 This is a cross-sectional view of the base in the automobile pedal travel testing device of the present invention.

[0042] Figure 6 This is a cross-sectional view of the placement frame in the automobile pedal travel testing device of the present invention.

[0043] The reference numerals in the accompanying drawings include:

[0044] 1. Base; 2. Sliding frame; 3. Rack; 4. Mounting platform; 5. Gear disk; 6. Spiral strip; 7. Scale plate; 8. Indicator plate; 9. Indicator needle; 10. Rotating platform; 11. Placement frame; 12. Pawl; 13. Telescopic rod; 14. Parallel rod; 15. Electric cylinder; 16. Fixing plate; 17. Piston plate; 18. Adsorption hole; 19. Clearance groove; 20. Image recognition device; 21. Pedal bracket. Detailed Implementation

[0045] The following detailed description illustrates the specific implementation method:

[0046] Example 1:

[0047] like Figure 1 and Figure 2As shown, this embodiment discloses a vehicle pedal travel testing device for testing the travel of a vehicle pedal, including a pedal bracket 21 detachably connected to the vehicle pedal (e.g., ...). Figure 2 As shown, this embodiment uses a suspended pedal bracket 21 and a base 1; a sliding frame 2 is welded to the top of the base 1, and a rack 3 is vertically slidably installed inside the sliding frame 2; as shown Figure 3 and Figure 4 As shown, a mounting platform 4 is welded to the side wall of the sliding frame 2. A gear disk 5 (120mm in diameter) is rotatably fitted on the side of the mounting platform 4 away from the sliding frame 2. A spiral strip 6 (15° spiral angle) is bolted to the side of the gear disk 5 near the mounting platform 4. The rack 3 meshes with the spiral strip 6. A scale plate 7 is welded to the top of the sliding frame 2. The scale plate 7 is engraved with stroke lines (maximum range 10cm) for measuring the displacement of the rack 3 (the straight distance before and after sliding). An indicator plate 8 is fixed to the top of the rack 3 by screws. By observing the position of the indicator plate 8 corresponding to the stroke line, the displacement of the rack 3 in the vertical direction can be obtained. An angle line (maximum range 360°) for measuring the rotation angle of the gear disk 5 (the rotation angle before and after rotation) is engraved on the edge of the gear disk 5. An indicator needle 9 is bolted to the side of the sliding frame 2 near the gear disk 5. By observing the position of the indicator needle 9 corresponding to the angle line, the rotation angle of the gear disk 5 can be obtained. A transmission assembly is also included. The transmission assembly is connected to the car pedal and the gear disk 5 respectively. It is used to drive the gear disk 5 to rotate synchronously with the car pedal and retain the stroke test results.

[0048] like Figure 2 As shown, the transmission assembly includes a rotating platform 10, a placement frame 11, a telescopic rod 13, and a parallel rod 14; the rotating platform 10 is coaxially rotatably connected to the gear disk 5, and a pawl 12 is hinged to the outer wall of the rotating platform 10, with one end of the pawl 12 away from the rotating platform 10 meshing with the gear disk 5 (e.g., ...). Figure 2 As shown, the pawl 12 is used to drive the gear disk 5 to rotate clockwise, and pressing the car pedal causes... Figure 2 When the rotating platform 10 rotates clockwise, the gear disk 5 also rotates clockwise along with the rotating platform 10. A telescopic rod 13 (adjustable range 25-50mm) is bolted to the rotating platform 10. Several parallel rods 14 are hinged to the side of the telescopic rod 13 away from the rotating platform 10, and the end of each parallel rod 14 away from the telescopic rod 13 is hinged to the placement frame 11. The telescopic rod 13 is parallel to the placement frame 11. The bottom of the placement frame 11 has a clearance groove 19 for the lateral sliding of the pedal bracket 21. The clearance groove 19 prevents the placement frame 11 from obstructing the pedal bracket 21, thus preventing the placement frame 11 from securing the car pedal.

[0049] The ratio of the displacement of the telescopic rod 13 when it rotates to the displacement of the rack 3 when it slides vertically is set as the proportional coefficient. The proportional coefficient ranges from 1 to 5 (the proportional coefficient can be adjusted according to the actual test situation during actual testing; in this embodiment, the proportional coefficient is 3).

[0050] Specifically, such as Figure 1 As shown, in the initial state, the indicator plate 8 is aligned with the starting position of the travel line (0 mark), and the indicator needle 9 is aligned with the starting position of the angle line (0 mark).

[0051] Before starting the test, the tester places the base 1 horizontally on the inner wall of the car. The angle and length of the telescopic rod 13 are adjusted according to the angle and height of the car pedal, so that the telescopic rod 13 is parallel to the car pedal. Since the telescopic rod 13 is set parallel to the placement frame 11, the angle and height of the placement frame 11 will also change when the tester adjusts the angle and length of the telescopic rod 13. The placement frame 11 will rotate synchronously with the rotation of the telescopic rod 13, and the height of the placement frame 11 will rise and fall with the extension and retraction of the telescopic rod 13. After adjusting the placement frame 11 to be parallel and at the same height with the car pedal, the car pedal is fixed with the placement frame 11, and the test can begin.

[0052] like Figure 2 As shown, during the test, the tester steps on the placement frame 11, causing the placement frame 11 to drive the car pedal and pedal bracket 21 to rotate clockwise around the mounting point of the pedal bracket 21 on the car. At this time, the placement frame 11 will pull the telescopic rod 13 and the rotating platform 10 to rotate clockwise synchronously through the parallel rods 14. The rotating platform 10 will then drive the pawl 12 to rotate clockwise. Since the pawl 12 meshes with the gear disk 5, the pawl 12 will drive the gear disk 5 and the angle line engraved on the outer edge of the gear disk 5 to rotate clockwise synchronously. After the rotation is completed, the angle line pointed to by the indicator needle 9 is the rotation angle of the gear disk 5. Since the gear disk 5 rotates synchronously with the car pedal, the rotation angle of the gear disk 5 can be used to reflect the rotation angle of the car pedal. However, due to the influence of the tooth pitch, there is a slight error between the rotation angle of the gear disk 5 and the rotation angle of the car pedal (this error value is proportional to the tooth pitch; in this embodiment, the error is about ±0.1°). The rotation angle of the gear disk 5 minus the error value is equal to the rotation angle of the car pedal.

[0053] During this process, because the spiral 6 meshes with the rack 3 (two adjacent teeth of the rack 3 are respectively engaged in the gaps on the adjacent sides of the spiral 6), the rack 3 slides vertically with the sliding frame 2. Therefore, the rotation of the spiral 6 will drive the rack 3 to slide vertically along the sliding frame 2. At this time, the stroke line aligned with the indicator plate 8 is the vertical movement stroke of the rack 3. Since the displacement of the telescopic rod 13 when it rotates is 3 times the displacement of the rack 3 (the proportional coefficient is 3 in this embodiment), and the rotation angle of the telescopic rod 13 is basically equal to the rotation angle of the car pedal (minus...) After deducting the error, and since the telescopic rod 13 is set parallel to the car pedal, the displacement of the telescopic rod 13 is equal to the displacement of the car pedal. Therefore, the displacement of the rack 3 can be used to reflect the displacement of the car pedal. Due to the error in the rotation angle, there will also be an error between the displacement of the car pedal and the displacement of the rack 3 (this error value is also proportional to the tooth pitch; in this embodiment, the error is approximately ±0.15mm). The displacement of the telescopic rod 13 (i.e., the displacement of the end of the telescopic rod 13 away from the rotating platform 10) minus the error value equals the displacement of the car pedal.

[0054] In actual use, the number of spiral turns of the 6-screw is selectable.

[0055] like Figure 2 As shown, after the test, the tester can release the car pedal. At this time, the car pedal rebounds, causing the placement frame 11 to reset. Under the transmission action of the parallel rod 14, the telescopic rod 13 and the rotating platform 10 will also rotate and reset. The rotating platform 10 will also drive the pawl 12 to rotate counterclockwise. However, since the pawl 12 only drives the gear disk 5 to rotate clockwise, the gear disk 5 and the rack 3 will remain stationary. In this embodiment, an electromagnet for attracting the rack 3 is embedded in the inner wall of the sliding frame 2. The controller can control the operation of the electromagnet. When the rack 3 is stationary, the electromagnet will attract and fix the rack 3, further ensuring the stability of the rack 3 (the force generated by the gear disk 5 when it rotates on the rack 3 is greater than the attraction of the electromagnet, and the attraction of the electromagnet is greater than the weight of the rack 3). This keeps the positions indicated by the indicator needle 9 and the indicator plate 8 unchanged, thus preserving the test results.

[0056] Existing testing devices, such as rope-pulling testing devices or dimensional measuring devices, cause the test results to disappear immediately after the tester releases the car pedal. This necessitates the tester to observe the test data while simultaneously pressing the pedal, requiring timely observation. Furthermore, the observation process may be hampered by physical obstruction (occupying approximately 30% of the observation space), requiring at least two testers and incurring significant resource investment. In this solution, after the pedal is reset, the gear disk 5 and rack 3 do not automatically reset under the attraction of the electromagnet. The tester does not need to continuously press the car pedal, and the device automatically retains the test results, facilitating observation (improving observation convenience by approximately 30%). Moreover, only one tester is required to conveniently complete the testing and observation recording process, further enhancing convenience.

[0057] The placement frame 11 is equipped with an electronic detection component for measuring the displacement, rotation angle and pressure value of the placement frame 11. The electronic detection component includes a displacement sensor, an angle sensor and a pressure sensor embedded in the placement frame 11.

[0058] Specifically, during the test, since the placement frame 11 rotates synchronously with the car pedal and is subjected to pressure in place of the car pedal, the displacement and rotation angle of the placement frame 11 are the same, and the pressure on the placement frame 11 is equivalent to the pressure on the car pedal. This solution collects the displacement, rotation angle, and pressure of the placement frame 11 through displacement sensors, angle sensors, and pressure sensors, thereby obtaining the displacement, rotation angle, and pressure of the car pedal. By comparing the data obtained through mechanical measurement with the data obtained through various sensors, testers can effectively determine whether the test results are accurate and reasonable, thus improving the reliability of the test results.

[0059] like Figure 6 As shown, the placement frame 11 is equipped with a fixing assembly for fixing car pedals of different sizes. The fixing assembly includes a controller and an electric cylinder 15 embedded in the top wall of the placement frame 11. The output shaft of the electric cylinder 15 is coaxially bolted to a fixing plate 16. The electric cylinder 15 is also connected to the controller, so that the controller can control the operation of the electric cylinder 15, thereby adjusting the position of the fixing plate 16, so that the fixing plate 16 can cooperate with the placement frame 11 to fix car pedals of different sizes in the placement frame 11.

[0060] Specifically, during the installation of the car pedal, the tester can activate the electric cylinder 15 through the controller to move the fixing plate 16 within the placement frame 11, thereby adjusting the distance between the fixing plate 16 and the bottom wall of the placement frame 11 (adjustable range is 0-30mm), so that the placement frame 11 can fix car pedals of different sizes, improving the overall practicality and applicability of the test device in this embodiment (applicable to 90% of car pedals on the market).

[0061] like Figure 5 As shown, a piston chamber is opened in the base 1, and a piston plate 17 is vertically slidably fitted in the piston chamber; the bottom of the rack 3 extends into the piston chamber and is fixedly connected to the top of the piston plate 17 by bolts; and several adsorption holes 18 are opened at the bottom of the base 1.

[0062] Specifically, when the rack 3 moves upward, it will drive the piston plate 17 to move upward in the piston chamber (volume of 500ml). Since the base 1 is in contact with the inner wall of the car, the piston chamber and the adsorption hole 18 will generate negative pressure (maximum negative pressure value of about 10kPa), which will further fix the device to the car through the adsorption hole 18, effectively improving the stability of the device (by about 30%), and thus improving the accuracy of the test.

[0063] like Figure 1 and Figure 2 As shown, the top of the scale plate 7 is provided with a recognition component for acquiring images of the indicator plate 8 and the indicator needle 9; the recognition component includes an image recognizer 20 fixedly connected to the top of the scale plate 7, and the image recognizer 20 is also connected to the controller, so that the controller can control the operation of the image recognizer 20.

[0064] Specifically, the image recognition device 20 can effectively acquire images of the indicator plate 8 and the indicator needle 9, thereby facilitating subsequent analysis of the displacement and rotation angle of the car pedal by testers, improving the automation level of the device and the accuracy of data processing.

[0065] This solution, through the design of gear disk 5 and rack 3, can simultaneously measure the rotation angle and displacement of the car pedal, eliminating the need for two separate sets of equipment, effectively improving testing efficiency and reducing testing costs and complexity.

[0066] Existing travel testing devices rely solely on electronic sensors for testing, lacking reliable mechanical measurement structures to assist in verifying the test results, resulting in low reliability of the test results. This invention, through the design of the gear disk 5 and rack 3, can accurately obtain the rotational and traverse travel of the car pedal through mechanical transmission, thereby realizing the mechanical measurement of the rotation angle and displacement of the car pedal. Testers can compare and analyze the test results of mechanical measurement with the test results of electronic sensor measurement, improving the stability and reliability of the test.

[0067] Example 2:

[0068] Unlike the embodiments described above, this embodiment also includes a comprehensive analysis system, which comprises a displacement analysis module, an angle analysis module, and a mechanical monitoring module, all of which are interconnected.

[0069] The specific functions of each module are as follows:

[0070] The displacement analysis module receives the displacement of the car pedal collected by the displacement sensor to obtain the first displacement; it also collects the image of the indicator board 8 recognized by the image recognizer 20, analyzes the value currently indicated by the indicator board 8 based on the image of the indicator board 8, subtracts the error value of the displacement between the car pedal and the rack 3 to obtain the current displacement of the rack 3, calculates the displacement of the car pedal based on the proportional coefficient, and obtains the second displacement; it also sets a displacement threshold (which can be set according to actual accuracy requirements), obtains the actual displacement difference based on the difference between the first and second displacements, and judges the reliability of the first displacement based on the actual displacement difference and the displacement threshold; when the actual displacement difference is less than the displacement threshold, the displacement analysis module judges the first displacement to be reliable; when the actual displacement difference is greater than the displacement threshold, the displacement analysis module judges the second displacement to be reliable and issues a displacement sensor calibration reminder.

[0071] The formula for calculating the second displacement is as follows:

[0072] .

[0073] Where K is the proportional coefficient (ranging from 1 to 5), L0 is the current displacement of rack 3, and L2 is the second displacement.

[0074] Specifically, in this embodiment, K is 3, the displacement threshold is 3mm, and the displacement sensor collects the displacement of the car pedal by 32mm. The first displacement is 32mm. Assuming the current indicator 8 indicates a value of 11mm, the error between the displacement of the car pedal and the rack 3 is 0.15mm. According to formula (1), the second displacement is 32.55mm. The difference between the first displacement and the second displacement is 0.55mm, which is less than the displacement threshold of 3mm. Therefore, the displacement analysis module judges that the first displacement is reliable and takes the data collected by the displacement sensor as the standard.

[0075] The angle analysis module is used to receive the rotation angle of the car pedal collected by the angle sensor to obtain the first rotation angle; it is also used to collect the image of the indicator needle 9 recognized by the image recognizer 20, and to analyze the value currently indicated by the indicator needle 9 based on the image of the indicator needle 9 to obtain the current rotation angle of the gear disk 5.

[0076] The rotation angle of the car pedal is analyzed by subtracting the error value between the current rotation angle of the gear disk 5 and the rotation angle of the car pedal, to obtain the second rotation angle. It is also used to set a rotation threshold (which can be set according to actual accuracy requirements), calculate the difference between the first rotation angle and the second rotation angle to obtain the actual rotation difference, and judge the reliability of the first rotation angle based on the actual rotation difference and the rotation threshold. When the actual rotation difference is less than the rotation threshold, the angle analysis module judges the first rotation angle to be reliable. When the actual rotation difference is greater than the rotation threshold, the angle analysis module judges the second rotation angle to be reliable and issues an angle sensor calibration reminder.

[0077] Specifically, in this embodiment, the rotation threshold is set to 4°. Assuming the rotation angle of the car pedal collected by the angle sensor is 31°, the first rotation angle is 31°. Assuming the current value indicated by the indicator needle 9 is 25° and the rotation error is 0.1°, the second rotation angle is 25.1°. The difference between the first and second rotation angles is 5.9°, which is greater than the rotation threshold of 4°. Therefore, the angle analysis module determines that the first rotation angle is unreliable and takes the mechanically measured second rotation angle as the test result. At the same time, it sends an angle sensor calibration reminder to the tester, reminding the tester to repair the angle sensor.

[0078] The mechanical monitoring module is used to receive the pressure value of the placement frame 11 collected by the pressure sensor, analyze the pressure value of the car pedal based on the pressure value of the placement frame 11, and obtain the pressure detection value.

[0079] Specifically, since the placement frame 11 rotates synchronously with the car pedal and the placement frame 11 is subjected to pressure instead of the car pedal, the displacement and rotation angle of the placement frame 11 are the same, and the pressure on the placement frame 11 is equivalent to the pressure on the car pedal. Testers do not need to install additional pressure sensors on the surface of the car pedal, which improves the convenience of monitoring.

[0080] Compared to existing technologies, this solution compares and analyzes the data measured by electronic sensors with the data measured and calculated by mechanical means. It compares the reliability of the test results measured by mechanical means with those measured by electronic sensors. When the test results measured by electronic sensors meet the reliability requirements, the results measured by electronic sensors are output, thus improving the accuracy of the test results. When the test results measured by electronic sensors do not meet the reliability requirements, the results measured and calculated by mechanical means are output, thus ensuring the reliability of the test results. Through selective output, the stability of the test is effectively guaranteed.

[0081] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A kind of automobile pedal stroke testing device, for testing the stroke of automobile pedal, including the pedal support (21) being connected with automobile pedal, it is characterized in that, Also include: Base (1), sliding frame (2) and rack (3), sliding frame (2) is installed on the top of base (1); Rack (3) is vertically slidingly installed in sliding frame (2), and the teeth on rack (3) extend out of sliding frame (2); Mounting table (4) and gear disc (5), mounting table (4) is installed on one side wall of sliding frame (2), gear disc (5) is installed on the side away from the sliding frame of mounting table (4); Gear disc (5) is fixedly connected with spiral strip (6) on the side close to mounting table (4), and spiral strip (6) is engaged with rack (3); Scale board (7) is installed on the end of sliding frame (2) away from base (1); Scale board (7) is formed with a stroke line for measuring the displacement of rack (3), and the top of rack (3) is fixedly connected with an indicating plate (8), and the displacement of rack (3) can be obtained by observing the position of the corresponding stroke line of indicating plate (8); The edge of gear disc (5) is formed with an angle line for measuring the rotation angle of gear disc (5), and an indicating needle (9) is fixedly arranged on the side close to gear disc (5) of sliding frame (2), and the rotation angle of gear disc (5) can be obtained by observing the position of the corresponding angle line of indicating needle (9); Transmission assembly, transmission assembly is connected with automobile pedal and gear disc (5) respectively, for driving gear disc (5) to rotate synchronously with automobile pedal and retaining the travel test result; The transmission assembly comprises a rotating table (10), a placing frame (11), an extension rod (13) and a parallel rod (14); The rotating table (10) is coaxially connected with the gear disc (5), and the outer side wall of the rotating table (10) is hingedly connected with a ratchet pawl (12), one end of the ratchet pawl (12) away from the rotating table (10) is engaged with the gear disc (5), so that the gear disc (5) can rotate with the rotating table (10) when the rotating table (10) rotates; The side wall of the rotating table (10) is also provided with an extension rod (13), and a plurality of parallel rods (14) are hingedly connected to the side of the extension rod (13) away from the rotating table (10), and one end of each parallel rod (14) away from the extension rod (13) is hingedly connected with the placing frame (11); The extension rod (13) and the placing frame (11) are arranged in parallel; The base (1) is provided with a piston cavity, and a piston plate (17) is vertically slidingly arranged in the piston cavity; The bottom of the rack (3) extends into the piston cavity and is fixedly connected with the top of the piston plate (17), and a plurality of adsorption holes (18) are formed in the bottom of the base (1).

2. The automotive pedal stroke testing device of claim 1, wherein, The ratio of the displacement of the extension rod (13) to the displacement of the rack (3) when vertically sliding is set as a proportionality coefficient, and the proportionality coefficient is in the range of 1-5.

3. The automotive pedal travel test apparatus according to claim 1, characterized by It also includes a fixing assembly, which is used for fixing automobile pedals of different sizes in the placing frame (11); The fixing assembly comprises a controller and an electric cylinder (15) mounted on the inner wall of the placing frame (11), and a fixing plate (16) is fixedly connected to the output shaft of the electric cylinder (15); The controller is in control connection with the electric cylinder (15), and is used for controlling the operation of the electric cylinder (15) to adjust the position of the fixing plate (16).

4. The automotive pedal stroke testing device of claim 1 or 3, wherein, The bottom of the placing frame (11) is provided with an avoiding slot (19) for transversely sliding of the pedal support (21).

5. The automotive pedal travel test apparatus according to claim 3, wherein The top of the scale plate (7) is provided with an identification assembly for collecting images of the indicator plate (8) and the indicator needle (9); the identification assembly comprises an image identifier (20) fixedly connected to the top of the scale plate (7), and the image identifier (20) is in control connection with the controller, so that the controller can control the image identifier (20) to operate.

6. The automotive pedal travel test apparatus according to claim 5, wherein The placing frame (11) is provided with an electronic detection assembly for measuring the displacement, rotation angle and pressure value of the placing frame (11), and the electronic detection assembly comprises a displacement sensor, an angle sensor and a pressure sensor installed in the placing frame (11).

7. The automotive pedal travel test apparatus according to claim 6, wherein Further comprising a comprehensive analysis system, the comprehensive analysis system comprises a displacement analysis module, an angle analysis module and a mechanical monitoring module; The displacement analysis module is used for receiving the displacement value of the automobile pedal collected by the displacement sensor to obtain a first displacement value; is also used for collecting the image of the indicator plate (8) recognized by the image identifier (20), analyzing the error value of the current indicated value of the indicator plate (8) based on the image of the indicator plate (8), obtaining the current displacement value of the rack (3), calculating the displacement value of the automobile pedal based on the proportion coefficient to obtain a second displacement value; is also used for setting a displacement threshold value, obtaining an actual displacement difference value according to the difference value between the first displacement value and the second displacement value, and judging the reliability of the first displacement value based on the actual displacement difference value and the displacement threshold value; When the actual displacement difference value is less than the displacement threshold value, the displacement analysis module judges that the first displacement value is reliable; when the actual displacement difference value is greater than the displacement threshold value, the displacement analysis module judges that the second displacement value is reliable, and sends a displacement sensor calibration reminder; The angle analysis module is used for receiving the rotation angle of the automobile pedal collected by the angle sensor to obtain a first rotation angle; is also used for collecting the image of the indicator needle (9) recognized by the image identifier (20), analyzing the current indicated value of the indicator needle (9) based on the image of the indicator needle (9), obtaining the current rotation angle of the gear plate (5), and analyzing the rotation angle of the automobile pedal based on the error value of the current rotation angle of the gear plate (5) minus the rotation angle of the automobile pedal and the gear plate (5) to obtain a second rotation angle; is also used for setting a rotation threshold value, calculating the difference value between the first rotation angle and the second rotation angle to obtain an actual rotation difference value, and judging the reliability of the first rotation angle based on the actual rotation difference value and the rotation threshold value; When the actual rotation difference value is less than the rotation threshold value, the angle analysis module judges that the first rotation angle is reliable; When the actual rotation difference value is greater than the rotation threshold value, the angle analysis module judges that the second rotation angle is reliable, and sends an angle sensor calibration reminder; The mechanical monitoring module is used for receiving the pressure value of the placing frame (11) collected by the pressure sensor, analyzing the pressure value of the automobile pedal based on the pressure value of the placing frame (11) to obtain a pressure detection value.

8. The automotive pedal travel test apparatus according to claim 7, characterized by The second displacement value calculation formula is as follows: ； wherein K is a proportionality factor, is the current displacement of the rack (3), is the second displacement.

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