A brake anti-pedaling system

Abstract

The application provides a brake anti-misoperation system, and relates to the technical field of automobile power devices.The technical scheme points are as follows: the brake anti-misoperation system comprises a trigger module and a control module;the trigger module comprises first arc-shaped plates and second arc-shaped plates arranged in sequence from top to bottom;the first arc-shaped plates are made of conductive material;the surfaces of the first arc-shaped plates are provided with anti-skid rubber layers;the second arc-shaped plates are made of insulating material;the bottom of each first arc-shaped plate is uniformly provided with four screw rods;four first positioning grooves are formed in the second arc-shaped plate in correspondence with the screw rods;each screw rod is provided with a first spring;the two ends of the first spring are connected with the first arc-shaped plate and the second arc-shaped plate respectively;and the natural length of the first spring is greater than the length of the screw rod.The brake anti-misoperation system has the advantages that the system can accurately distinguish the operation differences between normal heavy acceleration and panic misoperation, and can ensure the smoothness of normal driving and the rapid braking in the case of emergency misoperation.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of automobile power devices, in particular to a brake anti-mispressing system. BACKGROUND

[0002] With the increase of the number of automobiles, mispressing the accelerator while braking has become one of the important causes of traffic accidents, but the existing brake anti-mispressing devices mostly rely on a single pressure threshold to trigger braking, without distinguishing the operation difference between normal heavy acceleration and panic mispressing, and the pressure threshold of some systems is set too high to avoid mistriggering, resulting in delayed response in case of emergency mispressing; the pressure threshold of some systems is too low, which is easy to misstart braking during normal acceleration (such as heavy pressing of the accelerator during overtaking or climbing), thereby interfering with normal driving.

[0003] In view of the above problems, improvement is urgently needed. SUMMARY

[0004] The application aims to provide a brake anti-mispressing system which can accurately distinguish the operation difference between normal heavy acceleration and panic mispressing, ensure smoothness of normal driving and rapid braking in case of emergency mispressing, so as to solve the above problems.

[0005] The application provides a brake anti-mispressing system, and the technical scheme is as follows:

[0006] The application provides a brake anti-mispressing system, and the technical scheme is as follows:

[0007] The trigger module comprises a first arc-shaped plate and a second arc-shaped plate arranged in sequence from top to bottom, the first arc-shaped plate is made of conductive material, the surface of the first arc-shaped plate is provided with an anti-skid rubber layer, the second arc-shaped plate is made of insulating material, the bottom of the first arc-shaped plate is uniformly provided with four screw rods, the second arc-shaped plate is correspondingly provided with four first positioning grooves, a first spring is sleeved on each screw rod, the two ends of the first spring are connected with the first arc-shaped plate and the second arc-shaped plate respectively, the natural length of the first spring is greater than the length of the screw rod, each screw rod is adaptively connected with the corresponding first positioning groove, and the depth of the first positioning groove is greater than the length of the screw rod.

[0008] The top of the second arc-shaped plate is provided with a conductive spring piece, the conductive spring piece is sequentially embedded with a warning level pressure sensor, a starting level pressure sensor and an emergency level pressure sensor, the bottom of the first arc-shaped plate is provided with a first contact, a second contact and a third contact which are elastically telescopic in a concentric circle mode and correspond to the positions of the conductive spring piece, the diameters of the first contact, the second contact and the third contact increase in sequence, and the thicknesses of the first contact, the second contact and the third contact decrease in sequence, the first contact, the second contact, the third contact and the conductive spring piece are electrically connected with the control module, and the control module is connected with a brake pedal.

[0009] The brake anti-misoperation system provided by the application comprises a triggering module and a control module, the triggering module is used for sensing operation, and the control module is used for decision-making execution, thereby forming a complete closed loop of data acquisition, logical judgment and brake control, and ensuring that each module has clear division of labor and high cooperation efficiency; the triggering module comprises a first arc-shaped plate and a second arc-shaped plate arranged in sequence from top to bottom, the first arc-shaped plate is made of conductive material, the surface of the first arc-shaped plate is provided with an anti-skid rubber layer, the second arc-shaped plate is made of insulating material, and the first arc-shaped plate and the second arc-shaped plate are both arc-shaped structures, which are more suitable for the curved surface structure of the accelerator pedal and the foot shape of the driver, thereby improving the stepping comfort and avoiding foot palm deviation or inconvenient force exertion caused by the plane structure, the conductive material property of the first arc-shaped plate provides a conductive basis for the stepped contact, and the anti-skid rubber layer is used for increasing the friction force of the foot bottom and preventing misoperation caused by foot slipping during stepping, wherein the surface of the anti-skid rubber layer can be provided with diamond patterns, and the insulating material property of the second arc-shaped plate is used for avoiding short circuit between the conductive spring plate and the metal part of the pedal, thereby ensuring the safety of the circuit, wherein the material of the second arc-shaped plate can be specifically epoxy resin, which has excellent insulation effect; the bottom of the first arc-shaped plate is uniformly provided with four screw rods, the second arc-shaped plate is correspondingly provided with four first positioning grooves, each screw rod is sleeved with a first spring, the two ends of the first spring are connected with the first arc-shaped plate and the second arc-shaped plate respectively, the natural length of the first spring is greater than the length of the screw rod, each screw rod is adaptively connected with the corresponding first positioning groove, the depth of the first positioning groove is greater than the length of the screw rod, the structural layout of the four screw rods is in a rectangular distribution, the first positioning groove is correspondingly connected, the first arc-shaped plate is limited to slide along the axial direction of the screw rod, and misalignment of the contact caused by horizontal deviation is avoided, wherein the natural length of the first spring is greater than the length of the screw rod, so that the first spring forms elastic support, the natural gap between the first arc-shaped plate and the second arc-shaped plate is maintained when the first spring is not stepped, the first spring is compressed with pressure when the first spring is stepped, linear correlation change of pressure and displacement is realized, and the depth of the first positioning groove is greater than the length of the screw rod, so that the first arc-shaped plate has sufficient movement space, and the difference between normal heavy acceleration and panic misoperation is accurately distinguished.The bottom of the first arc-shaped plate is provided with a first contact, a second contact and a third contact corresponding to the position of the conductive elastic sheet in a concentric elastic expansion manner. The diameters of the first contact, the second contact and the third contact increase in turn, and the thicknesses thereof decrease in turn. The concentric layout ensures the accurate alignment of the contacts and the conductive elastic sheet. The diameters of the first contact, the second contact and the third contact increase in turn (for example, the diameter of the first contact is 5 mm, the diameter of the second contact is 11 mm, and the diameter of the third contact is 19 mm), and the thicknesses thereof decrease in turn (for example, the thickness of the first contact is 0.5 mm, the thickness of the second contact is 0.4 mm, and the thickness of the third contact is 0.3 mm). When stepping on, the pressing force contacts in the order from small to large (for example, the pressure of 80 N makes the first contact reach the conductive elastic sheet, the pressure of 100 N makes the second contact reach the conductive elastic sheet, and the pressure of 120 N makes the third contact reach the conductive elastic sheet). The different pressures are associated with the contacts in stages. The conductive characteristics of the contacts ensure that the pressure sensor signal is transmitted through the control module, forming a logic control chain of pressure triggering, circuit conduction and brake starting. The existing device cannot distinguish the pressure level and the contact order is chaotic (for example, high pressure line contact causes brake lag). The pressure level and the brake strength are accurately matched through the stepped contacts. The first contact, the second contact, the third contact and the conductive elastic sheet are electrically connected with the control module. The control module is connected with the brake pedal. The electrical connection ensures that the pressure signal and the contact signal are transmitted to the control module in real time. The control module communicates with the brake pedal actuator through the CAN bus, realizes the quick response of the judgment result and the brake action, and connects the brake pedal with the control module instead of directly controlling the throttle. The electrical connection and control logic optimization balance the safety and driving fluency, that is, accurately distinguish the operation difference between normal heavy acceleration and panic misstep, ensure the normal driving fluency and quick brake when misstepping.When the pedal pressure reaches 80N, the first arc-shaped plate descends under the compression of the first spring, the first contact head has the maximum thickness, and the first contact head preferentially contacts the conductive spring under the same pressure, that is, the first contact head preferentially contacts the conductive spring, and after the first contact head contacts the conductive spring, the pedal pressure is transmitted to the early warning level pressure sensor below the first contact head, the early warning level pressure sensor detects that the pressure reaches the 80N threshold, and transmits a signal to the control module, the control module can issue a warning signal to remind the driver to avoid misoperation, at this time, the second contact head and the third contact head are not in contact with the conductive spring due to the larger diameter and smaller thickness, and the starting level pressure sensor and the emergency level pressure sensor have no effective signal output.

[0010] Further, in the present application, the contact surfaces of the first contact head, the second contact head and the third contact head are all gold-plated copper materials.

[0011] The brake anti-misstep system provided in the application, the contact surfaces of the first contact, the second contact and the third contact are all gold-plated copper materials, the gold-plated copper material has a relatively low contact resistance (specifically, the thickness can be set to 0.1 mm, and the contact resistance is less than 50 mΩ), which ensures stable current transmission and avoids signal attenuation caused by excessive contact resistance, for example, the pressure sensor signal cannot be accurately transmitted, wherein the gold-plated structure has good oxidation resistance and corrosion resistance (salt spray test > 500 hours), and still maintains good electrical conductivity after long-term use, effectively prolonging the service life of the contact, the copper material is used as a base structure, which takes into account the electrical conductivity (conductivity 58 MS / m) and cost, avoiding the high cost caused by pure gold material, the base refers to the basic structure at the bottom, thereby solving the problems of large contact resistance (signal transmission distortion), easy oxidation and corrosion (failure after short-term use), and high cost (pure precious metal material) of the existing device, balancing the electrical conductivity, durability and economy.

[0012] Further, in the application, the base material of the first contact, the second contact and the third contact is a nickel-titanium shape memory alloy, and a copper-constantan bimetallic strip compensation ring is bonded between the first contact and the second contact and between the second contact and the third contact.

[0013] The brake anti-misstep system provided in the application, the base material of the first contact, the second contact and the third contact is a nickel-titanium shape memory alloy, and a copper-constantan bimetallic strip compensation ring is bonded between the first contact and the second contact and between the second contact and the third contact, the nickel-titanium shape memory alloy (phase transition temperature -25~65℃) has temperature self-adaptive characteristics, for example, the shrinkage is ≤0.5% at low temperature (<-15℃), and the expansion is ≤0.5% at high temperature (>55℃), avoiding the dramatic change in the size of the contact caused by temperature, the copper-constantan bimetallic strip compensation ring has the following characteristics: the thermal expansion coefficient of the copper side is 16.5x10-6 / ℃, and the thermal expansion coefficient of the constantan side is 1.5x10-6 / ℃, the compensation mechanism of the copper-constantan bimetallic strip compensation ring is essentially to use a controllable deformation (bending of the copper-constantan bimetallic strip compensation ring) to offset another inevitable deformation (temperature shrinkage or expansion of the nickel-titanium contact), the temperature deformation of the nickel-titanium contact is the source of compensation demand, which determines that a bending amount of 0.1 mm is needed to offset, the difference in thermal expansion coefficient of copper and constantan is the deformation power source, which ensures that a stable asymmetric bending can be generated when the temperature changes, the bending direction (low temperature towards the constantan side, high temperature towards the copper side) and the bending amount (0.1 mm) of the copper-constantan bimetallic strip compensation ring are the keys to precise compensation, which drives the adjacent contacts to move towards or away from each other by a corresponding distance, which exactly covers the gap change of the nickel-titanium contact, and finally realizes the accuracy of the contact under the environment of -25~65℃, providing a stable structural basis for distinguishing between normal hard acceleration and panic misstep.

[0014] Further, in the application, the conductive spring sheet is embedded with an NTC thermistor, and the NTC thermistor is electrically connected with the control module.

[0015] The brake anti-misstep system provided by the application has the advantages that the conductive spring sheet is embedded with an NTC thermistor, the NTC thermistor is electrically connected with the control module, the NTC thermistor can collect the temperature of the contact area in real time, and data is transmitted to the control module to provide data basis for temperature compensation (such as bending the bimetallic strip at low temperature and adjusting the pre-tightening force of the first spring at high temperature), the NTC thermistor is embedded at the center position of the conductive spring sheet and close to the contact surface, so as to reduce the temperature measurement error and ensure the accuracy of the temperature data, thereby solving the problems of no temperature monitoring (structure deviation caused by the inability to actively adjust the temperature) and inaccurate temperature measurement (compensation lag caused by the temperature sensor being far away from the contact area) of the prior art, providing data support for environmental adaptive compensation, and ensuring the accuracy of the miscontact judgment.

[0016] Further, in the application, the contact surfaces of the first contact, the second contact and the third contact are all provided with a nano-ceramic liquid storage layer, the nano-ceramic liquid storage layer is provided with a plurality of liquid storage holes, and each liquid storage hole is filled with conductive lubricating grease.

[0017] Further, in the application, the first contact and the second contact are filled with a polyimide film, and the second contact and the third contact are filled with a polyimide film.

[0018] Further, in the application, the first contact, the second contact and the third contact are all connected with the first arc-shaped plate through elastic buffer pads.

[0019] Further, in the application, the contact surface of the conductive spring sheet is provided with a plurality of elastic protrusions, the plurality of elastic protrusions are arranged in an array, and the top of each elastic protrusion is a spherical surface structure.

[0020] Further, in the application, the base of the first contact is provided with a resistance wear sensor, and the resistance wear sensor is electrically connected with the control module.

[0021] Further, in the application, the sidewall of each screw rod is embedded with a laser displacement sensor, the detection surface of the laser displacement sensor faces the first contact, and the laser displacement sensor is electrically connected with the control module.

[0022] Other features and advantages of the application will be described in the following description, and some will become apparent from the description, or will be understood from the practice of the application. The purpose and other advantages of the application can be achieved and obtained by the structure specifically pointed out in the written description and the drawings.

[0023] Beneficial effects: Through a multi-layered structural design of three-level pressure sensors and graded contacts, it achieves graded triggering for warning, start-up, and emergency situations, accurately distinguishing between normal hard acceleration and panic-induced accidental pressing, avoiding misjudgments caused by a single pressure threshold; the arc-shaped plate structure adapts to the shape of the foot and pedal, the anti-slip rubber layer prevents foot slippage, and the insulated arc-shaped plate prevents short circuits, balancing comfort and safety; the combined structure of the screw, positioning groove, and first spring limits the lateral displacement of the arc-shaped plate and provides elastic buffering, ensuring precise contact of the contacts, laying the foundation for stable data acquisition and rapid response; the control module is directly linked to the brake pedal, activating braking only in case of accidental pressing, without interfering with normal throttle operation, balancing protection and driving smoothness, solving the problems of delayed response due to excessively high thresholds and driving interference due to excessively low thresholds, thus accurately distinguishing between normal hard acceleration and panic-induced accidental pressing, ensuring smooth normal driving and rapid braking in case of emergency accidental pressing. Attached Figure Description

[0024] Figure 1 This application provides a schematic diagram of the structure of a brake anti-accidental pedaling system;

[0025] Figure 2 For this application Figure 1 Enlarged view of section A in the image;

[0026] Figure 3 For this application Figure 1 Enlarged view of section B in the image;

[0027] Figure 4 A schematic diagram of the structure of the first arc-shaped plate of a brake anti-accidental pedaling system provided in this application;

[0028] Figure 5 For this application Figure 4 Enlarged view of section C in the image;

[0029] Figure 6 This application provides a schematic diagram of the structure of the second arc-shaped plate of a brake anti-accidental pedaling system;

[0030] Figure 7 One of the exploded views of a brake anti-accidental pedaling system provided in this application;

[0031] Figure 8 The second exploded view of a brake anti-accidental pedaling system provided in this application.

[0032] In the figure: 1, first arc-shaped plate; 2, second arc-shaped plate; 3, screw rod; 4, first positioning groove; 5, first spring; 6, conductive spring; 7, early warning stage pressure sensor; 8, starting stage pressure sensor; 9, emergency stage pressure sensor; 10, first contact; 11, second contact; 12, third contact; 13, copper-constantan bimetallic strip compensation ring; 14, NTC thermistor; 15, nanometer ceramic liquid storage layer; 16, liquid storage hole; 17, polyimide film; 18, elastic buffer pad; 19, elastic protrusion; 20, resistance type wear sensor; 21, laser displacement sensor; 22, control module; 23, stepper motor; 24, gear set. DETAILED DESCRIPTION

[0033] The technical solutions in the present application will be described in detail below with reference to the accompanying drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] Please refer to Figures 1 to 8As shown, the brake anti-misstep system provided by the application includes a trigger module and a control module 22; the trigger module includes a first arc-shaped plate 1 and a second arc-shaped plate 2 arranged in sequence from top to bottom, the first arc-shaped plate 1 is made of conductive material, the surface of the first arc-shaped plate 1 is provided with an anti-skid rubber layer, the second arc-shaped plate 2 is made of insulating material, the bottom of the first arc-shaped plate 1 is uniformly provided with four screw rods 3, the second arc-shaped plate 2 is correspondingly provided with four first positioning grooves 4, each screw rod 3 is sleeved with a first spring 5, the two ends of the first spring 5 are connected with the first arc-shaped plate 1 and the second arc-shaped plate 2 respectively, the natural length of the first spring 5 is greater than the length of the screw rod 3, each screw rod 3 is adaptively clamped with the corresponding first positioning groove 4, and the depth of the first positioning groove 4 is greater than the length of the screw rod 3; the top of the second arc-shaped plate 2 is provided with a conductive spring piece 6, the conductive spring piece 6 is sequentially embedded with a warning level pressure sensor 7, a starting level pressure sensor 8 and an emergency level pressure sensor 9, the bottom of the first arc-shaped plate 1 is concentrically and elastically arranged with a first contact 10, a second contact 11 and a third contact 12 corresponding to the position of the conductive spring piece 6, the first contact 10, the second contact 11 and the third contact 12 are conductive, the diameters of the first contact 10, the second contact 11 and the third contact 12 increase in sequence, and the thicknesses of the first contact 10, the second contact 11 and the third contact 12 decrease in sequence, the first contact 10, the second contact 11, the third contact 12 and the conductive spring piece 6 are electrically connected with the control module 22, and the control module 22 is connected with a brake pedal.

[0036] In particular, with the increase in the number of cars, mispressing the accelerator while braking has become one of the important causes of traffic accidents, but the existing brake anti-mispressing devices mostly rely on a single pressure threshold to trigger braking, without distinguishing the operation difference between normal heavy acceleration and panic mispressing, and some systems set the pressure threshold too high to avoid mis-triggering, resulting in a lag in response when mispressing in an emergency; the pressure threshold of some systems is too low, which is easy to misstart braking during normal acceleration (such as heavy pressing of the accelerator when overtaking or climbing a slope), interfering with normal driving. In order to solve the above problems, the brake anti-mispressing system provided by the present application includes a trigger module and a control module 22, the trigger module is used to perceive the operation, and the control module 22 is used to make decisions and execute, which is used as a basic framework to form a complete closed loop of data collection, logical judgment and brake control, ensuring that each module has clear division of labor and high efficiency in cooperation; the trigger module includes a first arc-shaped plate 1 and a second arc-shaped plate 2 arranged in sequence from top to bottom, the first arc-shaped plate 1 is made of conductive material, the surface of the first arc-shaped plate 1 is provided with an anti-skid rubber layer, the second arc-shaped plate 2 is made of insulating material, the first arc-shaped plate 1 and the second arc-shaped plate 2 are both arc-shaped structures, which are more suitable for the curved surface structure of the accelerator pedal and the foot shape of the driver, improving the comfort of stepping, avoiding the foot palm deviation or difficulty in exerting force caused by the plane structure, the conductive material property of the first arc-shaped plate 1 provides a conductive basis for the stepped contact, and the anti-skid rubber layer is used to increase the friction force of the sole to prevent mispressing caused by slipping of the foot during stepping, wherein the surface of the anti-skid rubber layer can be provided with diamond patterns, and the insulating material property of the second arc-shaped plate 2 is used to avoid short circuit between the conductive spring 6 and the metal part of the pedal, ensuring the safety of the circuit, wherein the material of the second arc-shaped plate 2 can be specifically set as epoxy resin, which has excellent insulation effect; the bottom of the first arc-shaped plate 1 is uniformly provided with four screws 3, the second arc-shaped plate 2 is correspondingly provided with four first positioning grooves 4, each screw 3 is sleeved with a first spring 5, the two ends of the first spring 5 are connected with the first arc-shaped plate 1 and the second arc-shaped plate 2 respectively, the natural length of the first spring 5 is greater than the length of the screw 3, each screw 3 is adaptively connected with the corresponding first positioning groove 4, the depth of the first positioning groove 4 is greater than the length of the screw 3, and the structural layout of the four screws 3 is rectangularly distributed and adaptively connected with the first positioning groove 4, for example, the screw 3 can locally extend into the first positioning groove 4, the four screws 3 and the first spring 5 jointly act to limit the first arc-shaped plate 1 to slide only along the axial direction of the screw 3, avoiding the mispositioning of the contact caused by lateral deviation, wherein the natural length of the first spring 5 is greater than the length of the screw 3, so that the first spring 5 forms an elastic support, maintaining the natural gap between the first arc-shaped plate 1 and the second arc-shaped plate 2 when not stepping, and being compressed with pressure when stepping, realizing the linear correlation change of pressure and displacement, and the depth of the first positioning groove 4 is greater than the length of the screw 3, which ensures that the first arc-shaped plate 1 has sufficient travel space, providing a basis for distinguishing the operation difference between normal heavy acceleration and panic mispressing.The top of the second arc-shaped plate 2 is provided with a conductive elastic sheet 6, which is sequentially embedded with a pre-warning level pressure sensor 7, a starting level pressure sensor 8 and an emergency level pressure sensor 9. The conductive elastic sheet 6 provides a conductive path for the pressure sensors and can be made of beryllium copper with a graphene coating on the surface. This structure has excellent elasticity and can effectively buffer the impact of stepping. The three-level pressure sensors realize graded detection (the threshold of the pre-warning level pressure sensor 7 can be set to 80N (i.e. 80kg·m / s²), the threshold of the starting level pressure sensor 8 can be set to 100N, and the threshold of the emergency level pressure sensor 9 can be set to 120N), thereby avoiding misjudgment caused by a single pressure threshold (e.g. 80N pre-warning, 100N starting braking, and 120N emergency pressure increase).The bottom of the first arc-shaped plate 1 is provided with a first contact 10, a second contact 11 and a third contact 12 corresponding to the position of the conductive elastic sheet 6 in a concentric elastic expansion manner. The first contact 10, the second contact 11 and the third contact 12 are connected with the first arc-shaped plate 1 through elastic elements such as springs. The two ends of the elastic elements are connected with the bottom of the first arc-shaped plate 1 and the contact respectively. The elastic elements realize the expansion and contraction of the contact towards the conductive elastic sheet 6. The diameter of the first contact 10, the second contact 11 and the third contact 12 increases in turn, and the thickness decreases in turn. The thickness here refers to the axial (i.e. the movement direction) length of the contact. The concentric layout ensures the accurate alignment of the contact and the conductive elastic sheet 6. The diameter increases in turn (for example, the diameter of the first contact 10 is 5mm, the diameter of the second contact 11 is 11mm, and the diameter of the third contact 12 is 19mm), and the thickness decreases in turn (for example, the thickness of the first contact 10 is 0.5mm, the thickness of the second contact 11 is 0.4mm, and the thickness of the third contact 12 is 0.3mm). When stepping on, the pressing force contacts in the order from small to large (for example, 80N of pressure makes the first contact 10 reach the conductive elastic sheet 6, 100N of pressure makes the second contact 11 reach the conductive elastic sheet 6, and 120N of pressure makes the third contact 12 reach the conductive elastic sheet 6). The different pressures are associated with the contact in stages. The conductive characteristics of the contact ensure that the pressure sensor signal is transmitted through the control module 22, forming a logic control chain of pressure triggering, circuit conduction and brake starting. The pressure level is accurately matched with the brake strength through the staged contact. The first contact 10, the second contact 11, the third contact 12 and the conductive elastic sheet 6 are electrically connected with the control module 22. The control module 22 is connected with the brake pedal. The electrical connection ensures that the pressure signal and the contact signal are transmitted to the control module 22 in real time. The control module 22 communicates with the brake pedal actuator through the CAN bus, realizes the quick response of the judgment result and the brake action, and connects the brake pedal with the control module 22 instead of directly controlling the throttle. This avoids interfering with normal throttle operation and only realizes braking through the brake pedal when misstepping to ensure driving safety. The problems of signal transmission delay (slow brake response) and interference with normal throttle control (affecting normal acceleration operation) of the existing device are solved through electrical connection and control logic optimization. The balance between protection and driving smoothness, i.e. accurately distinguishing the operation difference between normal heavy acceleration and panic misstepping, ensures normal driving smoothness and quick braking when misstepping. The contact refers to one or more of the first contact 10, the second contact 11 and the third contact 12.

[0037] More specifically, in practical application, the second arc-shaped plate 2 is connected to the accelerator pedal of the automobile, i.e. the second arc-shaped plate 2 is installed on the upper surface of the accelerator pedal; in the actual driving process, when the pedal pressure reaches 80N, the first arc-shaped plate 1 descends under the compression of the first spring 5, the first contact 10 has the maximum thickness and preferentially contacts the conductive spring 6 under the same pressure, i.e. the first contact 10 first contacts the conductive spring 6, after the first contact 10 contacts the conductive spring 6, the pedal pressure is transmitted to the lower pre-warning level pressure sensor 7 through the first contact 10, the pre-warning level pressure sensor 7 detects that the pressure reaches the 80N threshold value, and transmits a signal to the control module 22, the control module 22 can issue a pre-warning signal to remind the driver to avoid misoperation, at this time, the second contact 11 and the third contact 12 are not in contact with the conductive spring 6 due to their larger diameter and smaller thickness, and the starting level pressure sensor 8 and the emergency level pressure sensor 9 have no effective signal output. When the pedal pressure increases to 100N, the first spring 5 is further compressed, the first arc-shaped plate 1 descends to the second contact 11 contacting the conductive spring 6, at this time, the first contact 10 continuously contacts the conductive spring 6, the pressure is still applied to the pre-warning level pressure sensor 7, forming a state that the first contact 10 and the second contact 11 both contact the conductive spring 6, after the second contact 11 contacts the conductive spring 6, the pressure is transmitted to the starting level pressure sensor 8, the starting level pressure sensor 8 detects the 100N threshold value, and the starting level pressure sensor 8 and the pre-warning level pressure sensor 7 together transmit their respective signals to the control module 22, the control module 22 cuts off the power, and at the same time controls the brake pedal to implement braking, wherein when the pressure is between 10N and 120N, the control module 22 can send a fuel cut-off or power cut-off signal to the automobile ECU through the CAN bus (fuel vehicle stops fuel supply, electric vehicle cuts off high-voltage loop), to avoid the vehicle speed continuing to rise due to misoperation of the accelerator pedal, the control module 22 activates the brake pedal actuator through the relay, and the brake motor pulls the brake pedal through the pull rope; at this time, the third contact 12 is still not in contact with the conductive spring 6, and the emergency level pressure sensor 9 has no signal. When the pedal pressure reaches 120N, the first spring 5 is compressed, the first arc-shaped plate 1 descends to the third contact 12 contacting the conductive spring 6, forming a state that the first contact 10, the second contact 11 and the third contact 12 all contact the conductive spring 6, after the third contact 12 contacts the conductive spring 6, the pressure is transmitted to the emergency level pressure sensor 9, the emergency level pressure sensor 9 detects the 120N threshold value, and the emergency level pressure sensor 9, the starting level pressure sensor 8 and the pre-warning level pressure sensor 7 together transmit their respective signals to the control module 22, the control module 22 can additionally start the brake booster, and through the cooperation of the ECU, the braking force is improved and the braking distance is shortened, at this time, all the contacts and sensors are in the activated state, providing the control module 22 with the highest priority trigger signal, thereby accurately distinguishing the difference between normal heavy acceleration and panic misoperation, and ensuring the smoothness of normal driving and rapid braking in case of emergency misoperation.

[0038] In some preferred embodiments, the contact surfaces of the first contact 10, the second contact 11 and the third contact 12 are all gold-plated copper materials.

[0039] Specifically, the contact surfaces of the first contact 10, the second contact 11 and the third contact 12 are all gold-plated copper materials, which have a low contact resistance (specifically, the thickness can be set to 0.1 mm, and the contact resistance is < 50 mΩ), ensuring stable current transmission and avoiding signal attenuation caused by excessive contact resistance, such as the inability of the pressure sensor signal to be accurately transmitted. The gold-plated structure has good anti-oxidation and corrosion resistance (salt spray test > 500 hours), and still maintains good electrical conductivity after long-term use, effectively prolonging the service life of the contact. The copper material serves as a base structure, balancing electrical conductivity (conductivity 58 MS / m) and cost, avoiding the high cost caused by pure gold material. The base refers to the basic structure at the bottom, thereby solving the problems of large contact resistance (signal transmission distortion), easy oxidation and corrosion (failure after short-term use), and high cost (pure precious metal material) of the existing device contacts, balancing electrical conductivity, durability and economy.

[0040] In some preferred embodiments, the base material of the first contact 10, the second contact 11 and the third contact 12 is a nickel-titanium shape memory alloy, and a copper-constantan bimetallic strip compensation ring 13 is bonded between the first contact 10 and the second contact 11 and between the second contact 11 and the third contact 12.

[0041] Specifically, the base material of the first contact 10, the second contact 11 and the third contact 12 is a nickel-titanium shape memory alloy, that is, the nickel-titanium shape memory alloy is used as the respective body part of the first contact 10, the second contact 11 and the third contact 12, and synchronously moves with the corresponding first contact 10, the second contact 11 and the third contact 12. Synchronous movement means that the newly arranged structure follows the corresponding first contact 10, the second contact 11 and the third contact 12 to elastically stretch and contract to approach or move away from the conductive spring piece 6. The copper-constantan bimetallic strip compensation ring 13 is adhered between the first contact 10 and the second contact 11 and between the second contact 11 and the third contact 12. The nickel-titanium shape memory alloy (the phase transition temperature is -25~65℃) has temperature self-adaptive characteristics, for example, the shrinkage amount is ≤0.5% at low temperature (<-15℃), and the expansion amount is ≤0.5% at high temperature (>55℃), which avoids the change in the size of the contact caused by temperature. The copper-constantan bimetallic strip compensation ring 13 has the following characteristics: the thermal expansion coefficient of the copper side is 16.5×10-6 / ℃, and the thermal expansion coefficient of the constantan side is 1.5×10-6 / ℃. The copper-constantan bimetallic strip compensation ring 13 between the first contact 10 and the second contact 11 is flush with the second contact 11, is adhered to the outer wall of the second contact 11 and synchronously moves with the second contact 11. The copper-constantan bimetallic strip compensation ring 13 between the second contact 11 and the third contact 12 is flush with the third contact 12, is adhered to the outer wall of the third contact 12 and synchronously moves with the third contact 12.

[0042] More specifically, the nickel-titanium shape memory alloy base will shrink at low temperatures (such as -25°C), with a shrinkage of ≤0.5%, for example, the first contact 10 with a diameter of 5 mm will shrink by about 0.025 mm in diameter, and the overall thickness of the contact (0.5 mm) will shrink by about 0.0025 mm, which will cause the initial assembly gap between the first contact 10 and the second contact 11, and between the second contact 11 and the third contact 12 to increase, and if not compensated, when the threshold pressure is reached, the contact needs to descend an additional distance to contact the conductive spring 6, causing a trigger delay (such as originally 80N pressure trigger, due to the increased gap, 85N is needed to trigger), affecting the accuracy of the misstep judgment. Therefore, at low temperatures, the copper layer and the constantan layer of the copper-constantan bimetallic ring 13 will shrink due to the decrease in temperature, but because the thermal expansion coefficient of copper is higher, its shrinkage rate is also higher, causing the copper side to shrink more than the constantan side, such as a temperature decrease of 40°C, the copper side shrinkage = 16.5 x 10-6 / ℃ x 40℃ x ring length L, the constantan side shrinkage = 1.5 x 10-6 / ℃ x 40℃ x ring length L, the copper side shrinkage is 11 times that of the constantan side), the smaller shrinkage of the constantan layer restricts the shrinkage of the copper layer, forcing the copper-constantan bimetallic ring 13 to bend as a whole to the constantan side, with a bending amount of 0.1 mm (pre-designed compensation amount), this bending will bring the adjacent contacts closer to each other by 0.1 mm, which will exactly fill the gap caused by the shrinkage of the nickel-titanium contact (about 0.025-0.05 mm), keeping the initial design gap of the contact, ensuring the contact at the threshold accuracy when stepping on, avoiding trigger delay. Among them, the nickel-titanium contact refers to one or more of the first contact 10, the second contact 11, and the third contact 12 made of nickel-titanium shape memory alloy material.

[0043] The nickel-titanium shape memory alloy base will expand at high temperatures (such as 65°C), and the expansion amount is ≤0.5%, for example, the first contact 10 is 5mm in diameter, and after expansion, the diameter increases by about 0.025mm, and the thickness (0.5mm) increases by about 0.025mm. Such expansion will cause the insulation gap between the first contact 10 and the second contact 11, and the second contact 11 and the third contact 12 to be compressed, and even cause the adjacent contacts to directly contact (for example, the original insulation gap of 0.1mm is reduced to 0.05mm after expansion, and if there is vibration or pressure fluctuation, the adjacent contacts are easy to touch), causing the circuit to short circuit (for example, the second contact 11 and the third contact 12 are short-circuited, causing the emergency level pressure sensor 9 to be triggered), interfering with normal driving or misjudging panic missteps. Therefore, at high temperatures, the copper layer and the constantan layer of the copper-constantan bimetallic strip compensation ring 13 will expand due to the increase in temperature. Because the thermal expansion coefficient of copper is higher, the expansion amount of the copper side is greater than that of the constantan side, for example, if the temperature rises by 40°C, the expansion amount of the copper side = 16.5x10-6 / ℃x40℃xring body length L, and the expansion amount of the constantan side = 1.5x10-6 / ℃x40℃xring body length L. The expansion amount of the copper side is 11 times that of the constantan side. The constantan layer with a smaller expansion amount restricts the expansion of the copper layer, forcing the copper-constantan bimetallic strip compensation ring 13 to bend towards the copper side as a whole, and the bending amount is still 0.1mm. Such bending will drive the adjacent contacts to move away from each other by 0.1mm, which exactly offsets the gap narrowing (about 0.025~0.5mm) caused by the expansion of the nickel-titanium contact, so that the contacts maintain a safe insulation gap, avoid contact short circuit between adjacent contacts, and ensure that the sensor accurately triggers the pressure level.

[0044] In summary, the compensation mechanism of the copper-constantan bimetallic strip compensation ring 13 is essentially to use a controllable deformation (bending of the copper-constantan bimetallic strip compensation ring 13) to offset another unavoidable deformation (temperature shrinkage or expansion of the nickel-titanium contact). The temperature deformation amount of the nickel-titanium contact is the source of compensation demand, which determines that a bending amount of 0.1mm is needed to offset. The difference in thermal expansion coefficient between copper and constantan is the source of deformation power, which ensures that a stable asymmetric bending can be generated when the temperature changes. The bending direction (towards the constantan side at low temperature and towards the copper side at high temperature) and the bending amount (0.1mm) of the copper-constantan bimetallic strip compensation ring 13 are the key to accurate compensation, which drives the adjacent contacts to move closer to or away from each other by a corresponding distance, which exactly covers the gap change of the nickel-titanium contact, and finally realizes the accuracy of the contact under the-25~65°C environment, providing a stable structural basis for distinguishing between normal heavy acceleration and panic missteps.

[0045] In some preferred embodiments, the conductive spring 6 is embedded with an NTC thermistor 14, and the NTC thermistor 14 is electrically connected to the control module 22.

[0046] Specifically, the conductive spring 6 is embedded with an NTC thermistor 14, which is electrically connected with the control module 22, and can collect the contact area temperature in real time and transmit the data to the control module 22 to provide data basis for temperature compensation (such as bending the copper-constantan bimetallic strip compensation ring 13 at low temperature, and adjusting the pre-tightening force of the first spring 5 at high temperature), wherein the thermistor is embedded at the center position of the conductive spring 6, close to the contact surface, thereby reducing the temperature measurement error and ensuring the accuracy of the temperature data, thereby solving the problems of no temperature monitoring (structure deviation caused by the inability to actively adjust the temperature) and inaccurate temperature measurement (compensation lag caused by the temperature sensor being far away from the contact area) of the existing device, providing data support for environmental adaptive compensation and ensuring the accuracy of the false touch judgment.

[0047] More specifically, the low-temperature control of the bimetallic bending refers to that when the temperature of the contact area detected by the NTC thermistor 14 drops to -15°C (e.g. after parking outdoors in winter in the north), the resistance value of the NTC thermistor 14 rises to about 80kΩ, the control module 22 converts the resistance signal into temperature data (the calculated temperature is -15°C) through the AD sampling circuit, compares the temperature data with the preset threshold value, determines that the copper-constantan bimetallic strip compensation ring 13 needs to be bent to compensate, and sends a compensation instruction to the copper-constantan bimetallic strip compensation ring 13 auxiliary driving unit. When the temperature of the contact area drops to -15°C, the copper-constantan bimetallic strip compensation ring 13 spontaneously generates asymmetric contraction, and the smaller constantan side limits the contraction of the copper side, forcing the copper-constantan bimetallic strip compensation ring 13 to bend towards the constantan side, and the bending amount is just the preset value (e.g. 0.1mm). The copper-constantan bimetallic strip compensation ring 13 is embedded between the first contact 10 and the second contact 11, and between the second contact 11 and the third contact 12. The bending of the copper-constantan bimetallic strip compensation ring 13 towards the constantan side will drive the adjacent contacts to move closer to each other through the physical connection structure, which will fill the gap caused by the contraction of the nickel-titanium contact, so that the nickel-titanium contact returns to the initial design gap, and ensures that the first contact 10 can accurately contact the conductive spring 6 under the pressure of 80N, avoiding triggering delay. The high-temperature adjustment of the pre-tightening force of the first spring 5 refers to that when the temperature of the contact area detected by the NTC thermistor 14 rises to 55°C (e.g. after being exposed to the sun in the car in summer), the resistance value of the NTC thermistor 14 drops to about 3kΩ, the control module 22 converts the resistance signal into temperature data (55°C), compares the temperature data with the threshold value, determines that the pre-tightening force of the first spring 5 needs to be adjusted, and sends an adjustment instruction to the pre-tightening force adjustment unit of the first spring 5 (which can be composed of a transmission structure of a stepping motor 23 and a gear set 24, the gear inner wall of the gear set 24 is threadedly connected with the outer wall of the screw rod 3, and the stepping motor 23 is electrically connected with the control module 22). After receiving the instruction from the control module 22, the stepping motor 23 of the pre-tightening force adjustment unit of the first spring 5 drives the gear set 24 to rotate, the gear set 24 is engaged with the threaded structure at the top of the screw rod 3, and drives the screw rod 3 to move upwards along the first positioning groove 4. The upward movement of the screw rod 3 will cause additional compression of the first spring 5, and the pre-tightening force of the first spring 5 will increase, so that the first arc-shaped plate 1 needs to bear greater pressure to move downward, which indirectly prolongs the contact time of the contact and the conductive spring 6. If the gap caused by the expansion of the nickel-titanium contact is reduced, a greater pressure than the original preset pressure is required to make the contact contact the conductive spring 6, so as to avoid the inaccurate judgment caused by the early contact under low pressure.

[0048] In some preferred embodiments, the contact surfaces of the first contact 10, the second contact 11 and the third contact 12 are each provided with a nano-ceramic liquid storage layer 15, and the nano-ceramic liquid storage layer 15 is provided with a plurality of liquid storage holes 16, and each liquid storage hole 16 is filled with conductive lubricating grease.

[0049] Specifically, the contact surfaces of the first contact 10, the second contact 11 and the third contact 12 are each provided with a nano-ceramic liquid storage layer 15, the nano-ceramic liquid storage layer 15 is provided with a plurality of liquid storage holes 16, each of the liquid storage holes 16 is filled with conductive grease, the nano-ceramic liquid storage layer 15 (which can be specifically provided as aluminum oxide ceramic, with a thickness of 0.3 mm and a porosity of 30%) has high hardness (HV1200) and wear resistance, and can effectively protect the gold-plated layer on the surface of the contact. At the same time, the liquid storage holes 16 (which can be specifically provided as 50 μm) provide storage space for the conductive grease, and the conductive grease (which can be specifically provided as nano-silver composition, with a conductivity of 1.2 x 105 S / m) has the following characteristics: when worn (the gold-plated copper layer is worn by 0.05-1 mm), the grease seeps out under the action of the stepping pressure, fills the wear gap, and maintains the contact resistance ≤30 mΩ, while also having lubricating and reducing the frictional wear between the contact and the conductive spring 6. Thus, the problems of fast wear of the contact (such as failure after 30-50 thousand steps) and poor contact after wear (signal transmission interruption) of the existing device are solved, the service life of the contact is greatly improved, and the accuracy of the false touch judgment is also considered. Among them, the nano-ceramic liquid storage layer 15 coated on the contact surface of the first contact 10 moves synchronously with the first contact 10; the nano-ceramic liquid storage layer 15 coated on the contact surface of the second contact 11 moves synchronously with the second contact 11; and the nano-ceramic liquid storage layer 15 coated on the contact surface of the third contact 12 moves synchronously with the third contact 12.

[0050] In some preferred embodiments, a polyimide film 17 is filled between the first contact 10 and the second contact 11, and a polyimide film 17 is filled between the second contact 11 and the third contact 12.

[0051] Specifically, the polyimide film 17 is arranged between the first contact 10 and the second contact 11, and the polyimide film 17 is arranged between the second contact 11 and the third contact 12. The polyimide film 17 (which can be 0.1 mm thick and has a temperature resistance of -269-400℃) has excellent insulation (breakdown voltage ≥ 3kV), completely isolates adjacent contacts, avoids short circuits caused by contact deviation and expansion (such as the second contact 11 contacting the third contact 12 causing false triggering), and has excellent flexibility (bending radius ≤ 1mm), does not affect the normal sliding of the first arc-shaped plate 1, is resistant to aging (service life > 10 years), and does not attenuate the insulation performance after long-term use. Thus, the problems of no insulation isolation between the contacts of the existing device (such as easy short circuit leading to false triggering) and poor temperature resistance of the insulation material (such as insulation failure at high temperatures) are solved, the independent operation of the stepped contacts is ensured, and circuit interference is avoided, thereby facilitating the accurate differentiation between normal hard acceleration and panic missteps, ensuring smooth normal driving and rapid braking in case of emergency missteps. The polyimide film 17 arranged between the first contact 10 and the second contact 11 is flush with the second contact 11, the polyimide film 17 between the first contact 10 and the second contact 11 is bonded to the outer wall of the second contact 11 and moves synchronously with the second contact 11; the polyimide film 17 arranged between the second contact 11 and the third contact 12 is flush with the third contact 12, the polyimide film 17 between the second contact 11 and the third contact 12 is bonded to the outer wall of the third contact 12 and moves synchronously with the third contact 12.

[0052] In some preferred embodiments, the first contact 10, the second contact 11, and the third contact 12 are connected with the first arc-shaped plate 1 by elastic buffer pads 18.

[0053] Specifically, the first contact 10, the second contact 11 and the third contact 12 are connected with the first arc-shaped plate 1 through the elastic buffer pad 18, the elastic buffer pad 18 has the elastic deformation ability, absorbs the instantaneous impact force when stepping, such as the 120N pressure impact when stepping by mistake in panic, reduces the rigid collision between the contact and the arc-shaped plate, protects the nickel-titanium shape memory alloy of the contact base and the gold-plated copper layer on the surface, the elasticity of the elastic buffer pad 18 forms soft contact when the contact and the conductive spring 6 are in contact, avoids the deformation of the conductive spring 6 caused by hard contact, such as the fatigue failure of the beryllium copper conductive spring 6 after long-term hard contact, thereby solving the problems of the existing device, such as no buffer of the contact, easy to damage (cracking of the base and falling of the gold-plated layer caused by impact), fast fatigue failure of the conductive spring 6 (deformation caused by hard contact), prolonging the service life of the contact and the conductive spring 6, reducing the replacement cost, and ensuring the continuous performance of the accurate judgment of the misoperation. The elastic buffer pad 18 can be made of silicone rubber material, which has strong environmental resistance and does not affect the conductivity of the contact.

[0054] In some preferred embodiments, the contact surface of the conductive spring 6 is provided with a plurality of elastic protrusions 19, and the plurality of elastic protrusions 19 are arranged in an array, and the top of each elastic protrusion 19 is a spherical structure.

[0055] Specifically, the contact surface of the conductive spring 6 is provided with a plurality of elastic protrusions 19, and the plurality of elastic protrusions 19 are arranged in an array, and the top of each elastic protrusion 19 is a spherical structure, and the elastic protrusion 19 can be made of beryllium copper material, the height can be 0.2mm, the diameter can be 0.5mm, and the array spacing can be 1mm. When stepping, the elastic protrusion 19 forms a point-surface contact with the contact, compared with surface-surface contact, the local contact pressure is increased, the pressure concentration effect is generated, the contact resistance temperature is ensured, even if there is a slight stain on the surface of the contact, the conductivity can be ensured to be good, the accuracy of the misoperation judgment is ensured, the spherical structure (the curvature radius can be specifically set to 0.3mm) avoids scratching the gold-plated copper layer of the contact with the sharp end of the elastic protrusion 19, and at the same time has a guiding effect, guiding the contact to accurately contact, the elastic protrusion 19 has elasticity, buffers the stepping impact, and reduces the overall deformation of the conductive spring 6. Thus, the problems of the existing device, such as poor contact between the spring and the contact (increased resistance caused by surface stains and slight wear), and easy scratching of the contact by the spring (damage to the conductive surface layer caused by sharp contact ends), are solved, the contact stability and component durability are improved, and thus the difference between normal hard acceleration and panic misstep is accurately distinguished, the normal driving fluency is ensured, and the rapid braking in the case of emergency misstep is ensured.

[0056] In some preferred embodiments, the base of the first contact 10 is provided with a resistance wear sensor 20, and the resistance wear sensor 20 is electrically connected with the control module 22.

[0057] Specifically, the base of the first contact 10 is provided with a resistance wear sensor 20, which is electrically connected with a control module 22. The resistance wear sensor 20 can monitor the wear amount of the first contact 10 in real time, that is, the total wear amount of the gold-plated copper layer and the base nickel-titanium shape memory alloy, record the linear change data of the output resistance with the wear amount, such as the resistance change of 50Ω when the wear is 0.1mm, and transmit the wear data to the control module 22. When the wear amount is greater than 0.1mm, the control module 22 sends a maintenance reminder (such as a pop-up window on the instrument screen) to the vehicle-mounted central control, and at the same time, the amount of conductive grease seeping out of the nano-ceramic liquid storage layer 15 is increased, prolonging the service life and continuously ensuring the accuracy of the judgment of the false touch. Thus, the problems of no wear monitoring (unable to predict the maintenance time, sudden failure leading to safety hazards) and untimely maintenance (continuing to use when the wear exceeds the limit, leading to brake delay) in the existing device are solved, the wear state is visualized and actively reminded, the system reliability is improved, and the full-process accuracy of the judgment of the false touch operation is ensured.

[0058] In some preferred embodiments, the side wall of each screw rod 3 is embedded with a laser displacement sensor 21, the detection surface of the laser displacement sensor 21 is arranged towards the first contact 10, and the laser displacement sensor 21 is electrically connected with the control module 22.

[0059] Specifically, the side wall of each screw rod 3 is embedded with a laser displacement sensor 21, the detection surface of the laser displacement sensor 21 is arranged towards the first contact 10, and the laser displacement sensor 21 is electrically connected with the control module 22. The laser displacement sensor 21 collects the downward displacement of the first arc-shaped plate 1 in real time, and converts it into the instantaneous stepping speed and the speed change rate through the algorithm of the control module 22. Among them, the four sensors can be divided into two groups of main redundancy, that is, the two sensors on the same diagonal line are the main ones, and the other two are the redundant ones. When the data deviation is greater than 0.005mm, the control module 22 automatically switches the redundant sensor to ensure the accuracy of the displacement data. Thus, the accurate cooperative judgment of the speed data and the pressure data is realized (such as normal acceleration operation when the pressure is 100N but the speed is less than or equal to 5mm / s, and panic false stepping operation when the speed is greater than or equal to 15mm / s), and the misjudgment rate is greatly reduced. Thus, the problems of high misjudgment rate (unable to distinguish between normal heavy acceleration and panic false stepping operation) and inaccurate displacement data (single sensor failure leading to broken judgment failure) in the existing device are solved, the operation intention is accurately identified, the difference between normal heavy acceleration and panic false stepping operation is accurately distinguished, and the smoothness of normal driving and the rapid braking when false stepping is ensured.

[0060] The brake anti-misstep system provided by the technical scheme comprises a triggering module and a control module 22. The triggering module is used for sensing operation, and the control module 22 is used for decision-making execution. This serves as a basic framework to form a complete closed loop of data acquisition, logical judgment and brake control, and to ensure that each module has clear division of labor and high efficiency in cooperation. The triggering module comprises a first arc-shaped plate 1 and a second arc-shaped plate 2 arranged in sequence from top to bottom. The first arc-shaped plate 1 is made of a conductive material, and the surface of the first arc-shaped plate 1 is provided with an anti-skid rubber layer. The second arc-shaped plate 2 is made of an insulating material. The first arc-shaped plate 1 and the second arc-shaped plate 2 are both arc-shaped structures, which are more suitable for the curved surface structure of the accelerator pedal and the foot shape of the driver, thereby improving the stepping comfort and avoiding the foot displacement or inconvenience in exerting force caused by the planar structure. The conductive material property of the first arc-shaped plate 1 provides a conductive basis for the stepped contact. The anti-skid rubber layer is used to increase the friction force of the foot bottom and prevent the misoperation caused by the foot slipping during stepping. The surface of the anti-skid rubber layer can be provided with a diamond pattern. The insulating material property of the second arc-shaped plate 2 is used to avoid the short circuit between the conductive spring 6 and the metal part of the pedal, thereby ensuring the safety of the circuit. The material of the second arc-shaped plate 2 can be specifically epoxy resin, which has excellent insulation effect. The bottom of the first arc-shaped plate 1 is uniformly provided with four screw rods 3. The second arc-shaped plate 2 is correspondingly provided with four first positioning grooves 4. Each screw rod 3 is sleeved with a first spring 5. The two ends of the first spring 5 are connected with the first arc-shaped plate 1 and the second arc-shaped plate 2, respectively. The natural length of the first spring 5 is greater than the length of the screw rod 3. Each screw rod 3 is adaptively connected with the corresponding first positioning groove 4. The depth of the first positioning groove 4 is greater than the length of the screw rod 3. The structural layout of the four screw rods 3 is in a rectangular distribution. The first arc-shaped plate 1 is limited to slide along the axial direction of the screw rod 3, and the misalignment of the contact caused by the horizontal displacement is avoided. The natural length of the first spring 5 is greater than the length of the screw rod 3, so that the first spring 5 forms an elastic support. When not stepped, the natural gap between the first arc-shaped plate 1 and the second arc-shaped plate 2 is maintained. When stepped, the first spring 5 is compressed with the pressure, thereby realizing the linear correlation change between the pressure and the displacement. The depth of the first positioning groove 4 is greater than the length of the screw rod 3, thereby ensuring that the first arc-shaped plate 1 has sufficient travel space, and providing a basis for distinguishing the operation difference between the normal heavy acceleration and the panic misstep. The top of the second arc-shaped plate 2 is provided with a conductive spring 6. The conductive spring 6 is sequentially embedded with a warning level pressure sensor 7, a starting level pressure sensor 8 and an emergency level pressure sensor 9. The conductive spring 6 provides a conductive path for the pressure sensor, which can be specifically made of beryllium copper material and provided with a graphene coating on the surface. This structure has excellent elasticity and can effectively buffer the stepping impact. The three-level pressure sensors realize graded detection (the threshold value of the warning level pressure sensor 7 can be set to 80N, the threshold value of the starting level pressure sensor 8 can be set to 100N, and the emergency level pressure sensor 9 can be set to 120N).The bottom of the first arc-shaped plate 1 is provided with a first contact 10, a second contact 11 and a third contact 12 in sequence and in a concentric circle manner, which correspond to the position of the conductive spring 6. The diameter of the first contact 10, the second contact 11 and the third contact 12 increases in sequence, and the thickness thereof decreases in sequence. The concentric circle arrangement ensures the accurate alignment of the contacts and the conductive spring 6. The diameter of the first contact 10, the second contact 11 and the third contact 12 increases in sequence (for example, the diameter of the first contact 10 is 5 mm, the diameter of the second contact 11 is 11 mm, and the diameter of the third contact 12 is 19 mm), and the thickness thereof decreases in sequence (for example, the thickness of the first contact 10 is 0.5 mm, the thickness of the second contact 11 is 0.4 mm, and the thickness of the third contact 12 is 0.3 mm). When stepping on, the pressing force contacts in the order from small to large (for example, the pressure of 80 N makes the first contact 10 reach the conductive spring 6, the pressure of 100 N makes the second contact 11 reach the conductive spring 6, and the pressure of 120 N makes the third contact 12 reach the conductive spring 6), realizing the hierarchical association of different pressures and contacts. The conductive characteristics of the contacts ensure that the pressure sensor signal is transmitted through the control module 22, forming a logical control chain of pressure triggering, circuit conduction and brake starting, solving the problem that the single contact of the existing device cannot distinguish the pressure level and the contact sequence is chaotic (for example, high pressure line contact causes brake lag). The hierarchical contacts realize the accurate matching of pressure level and brake strength. The first contact 10, the second contact 11, the third contact 12 and the conductive spring 6 are electrically connected with the control module 22. The control module 22 is connected with the brake pedal. The electrical connection ensures that the pressure signal and the contact signal are transmitted to the control module 22 in real time. The control module 22 communicates with the brake pedal actuator through the CAN bus, realizes the quick response of the judgment result and the brake action, and connects the brake pedal with the control module 22 instead of directly controlling the throttle, avoiding interfering with normal throttle operation, realizing brake only when misstepping, ensuring driving safety, solving the problems of signal transmission delay (slow brake response) and interfering with normal throttle control (affecting normal acceleration operation) of the existing device, balancing the protection and driving fluency, that is, accurately distinguishing the operation difference between normal heavy acceleration and panic misstepping, ensuring normal driving fluency and quick brake when misstepping.More specifically, when the pedal pressure reaches 80N, the first arc-shaped plate 1 descends under the compression of the first spring 5, the first contact 10 has the maximum thickness and preferentially contacts the conductive spring 6 under the same pressure, that is, the first contact 10 first contacts the conductive spring 6, after the first contact 10 contacts the conductive spring 6, the pedal pressure is transmitted to the early warning level pressure sensor 7 below through the first contact 10, the early warning level pressure sensor 7 detects that the pressure reaches the 80N threshold, and transmits a signal to the control module 22, the control module 22 can issue a warning signal to remind the driver to avoid misoperation, at this time, the second contact 11 and the third contact 12 are not in contact with the conductive spring 6 due to their larger diameter and smaller thickness, and the starting level pressure sensor 8 and the emergency level pressure sensor 9 have no effective signal output. When the pedal pressure increases to 100N, the first spring 5 is further compressed, the first arc-shaped plate 1 descends to the second contact 11 contacting the conductive spring 6, at this time, the first contact 10 continuously contacts the conductive spring 6, and the pressure is still applied to the early warning level pressure sensor 7, forming a state that the first contact 10 and the second contact 11 both contact the conductive spring 6, after the second contact 11 contacts the conductive spring 6, the pressure is transmitted to the starting level pressure sensor 8, the starting level pressure sensor 8 detects the 100N threshold, and the starting level pressure sensor 8 and the early warning level pressure sensor 7 transmit their respective signals to the control module 22, the control module 22 cuts off the power, and controls the brake pedal to implement braking, wherein, when the pressure is between 10N and 120N, the control module 22 can send a fuel cut-off or power cut-off signal to the automobile ECU through the CAN bus (fuel vehicle stops fuel supply, electric vehicle cuts off high-voltage loop) to avoid the vehicle speed continuing to rise due to misoperation of the accelerator pedal, the control module 22 activates the brake pedal actuator through the relay, and the brake motor pulls the brake pedal through the pull rope; At this time, the third contact 12 does not contact the conductive spring 6, and the emergency level pressure sensor 9 has no signal. When the pedal pressure reaches 120N, the first spring 5 is compressed, the first arc-shaped plate 1 descends to the third contact 12 contacting the conductive spring 6, forming a state that the first contact 10, the second contact 11 and the third contact 12 all contact the conductive spring 6, after the third contact 12 contacts the conductive spring 6, the pressure is transmitted to the emergency level pressure sensor 9, the emergency level pressure sensor 9 detects the 120N threshold, and the emergency level pressure sensor 9, the starting level pressure sensor 8 and the early warning level pressure sensor 7 transmit their respective signals to the control module 22, the control module 22 can additionally start the brake booster pump, and through the cooperation of the ECU, the braking force is improved and the braking distance is shortened, at this time, all the contacts and sensors are in the activated state, providing the control module 22 with the highest priority trigger signal, thereby accurately distinguishing the difference between normal heavy acceleration and panic misoperation, ensuring smooth normal driving and rapid braking in case of emergency misoperation.The contact surfaces of the first contact 10, the second contact 11 and the third contact 12 are all gold-plated copper materials, which have a low contact resistance (specifically, the thickness can be set to 0.1 mm, and the contact resistance is less than 50 mΩ), ensuring stable current transmission and avoiding signal attenuation caused by excessive contact resistance, such as the inability to accurately transmit pressure sensor signals. The gold-plated structure has good anti-oxidation and corrosion resistance (salt spray test > 500 hours), maintains good electrical conductivity after long-term use, effectively prolongs the service life of the contact, and balances the electrical conductivity, durability and economy. The base material of the first contact 10, the second contact 11 and the third contact 12 is a nickel-titanium shape memory alloy, and a copper-constantan bimetallic strip compensation ring 13 is bonded between the first contact 10 and the second contact 11 and between the second contact 11 and the third contact 12. The nickel-titanium shape memory alloy (phase transition temperature -25~65℃) has a temperature self-adaptive characteristic, such as a shrinkage of ≤0.5% at low temperature (<-15℃) and an expansion of ≤0.5% at high temperature (>55℃), which avoids the dramatic change in contact size caused by temperature. The copper-constantan bimetallic strip compensation ring 13 has the following characteristics: the copper side thermal expansion coefficient is 16.5×10-6 / ℃, and the constantan side thermal expansion coefficient is 1.5×10-6 / ℃. The compensation mechanism of the copper-constantan bimetallic strip compensation ring 13 is essentially to use a controllable deformation (bending of the copper-constantan bimetallic strip compensation ring 13) to offset another inevitable deformation (temperature shrinkage or expansion of the nickel-titanium contact). The temperature deformation of the nickel-titanium contact is the source of compensation demand, which determines the need for 0.1 mm of bending to offset the difference in thermal expansion coefficient of copper and constantan, which is the source of deformation power, ensuring that a stable asymmetric bend is generated when the temperature changes. The bending direction (low temperature towards the constantan side, high temperature towards the copper side) and the bending amount (0.1 mm) of the copper-constantan bimetallic strip compensation ring 13 are the key to precise compensation, which drives the adjacent contacts to move closer or further apart by a corresponding distance, covering the gap change of the nickel-titanium contact, and ultimately achieving precise contact of the contact in the -25~65℃ environment, providing a stable structural basis for distinguishing between normal high-speed acceleration and panic missteps.The conductive spring 6 is embedded with an NTC thermistor 14, which is electrically connected with the control module 22, and can collect the temperature of the contact area in real time and transmit the data to the control module 22 to provide data basis for temperature compensation (such as bending the copper-constantan bimetallic strip compensation ring 13 at low temperature, and adjusting the pre-tightening force of the first spring 5 at high temperature), wherein the thermistor is embedded at the center of the conductive spring 6 and close to the contact surface, thereby reducing the temperature measurement error and ensuring the accuracy of the temperature data, thereby solving the problems of no temperature monitoring (structure deviation caused by the inability to actively adjust the temperature) and inaccurate temperature measurement (compensation lag caused by the temperature sensor being far away from the contact area) of the existing device, providing data support for environmental adaptive compensation and ensuring the accuracy of the false touch judgment.

[0061] The above only describes the embodiments of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A brake misapplication prevention system, characterized in that, The trigger module and the control module (22) are included; The trigger module includes first and second arc-shaped plates (1, 2) arranged in sequence from top to bottom, the first arc-shaped plate (1) is made of conductive material, the surface of the first arc-shaped plate (1) is provided with an anti-skid rubber layer, the second arc-shaped plate (2) is made of insulating material, the bottom of the first arc-shaped plate (1) is uniformly provided with four screw rods (3), the second arc-shaped plate (2) is correspondingly provided with four first positioning grooves (4), each screw rod (3) is sleeved with a first spring (5), the two ends of the first spring (5) are connected with the first and second arc-shaped plates (1, 2), respectively, the natural length of the first spring (5) is greater than the length of the screw rod (3), each screw rod (3) is adaptively connected with the corresponding first positioning groove (4), and the depth of the first positioning groove (4) is greater than the length of the screw rod (3). The top of the second arc-shaped plate (2) is provided with a conductive spring piece (6), the conductive spring piece (6) is sequentially embedded with a pre-warning level pressure sensor (7), a starting level pressure sensor (8) and an emergency level pressure sensor (9), the bottom of the first arc-shaped plate (1) is provided with a first contact (10), a second contact (11) and a third contact (12) which are elastically and flexibly arranged in a concentric circle and correspond to the position of the conductive spring piece (6), the diameters of the first, second and third contacts (10, 11, 12) increase in sequence, and the thicknesses thereof decrease in sequence, the first, second and third contacts (10, 11, 12) and the conductive spring piece (6) are electrically connected with the control module (22), and the control module (22) is connected with a brake pedal.

2. A system for preventing inadvertent actuation of a brake as defined in claim 1, wherein The contact surfaces of the first, second and third contacts (10, 11, 12) are made of gold-plated copper material.

3. A system for preventing inadvertent actuation of a brake as defined in claim 2, wherein The base materials of the first, second and third contacts (10, 11, 12) are nickel-titanium shape memory alloy, and copper-constantan bimetallic strip compensation rings (13) are adhered between the first and second contacts (10, 11) and between the second and third contacts (11, 12).

4. A system for preventing inadvertent actuation of a brake as defined in claim 3, wherein The conductive spring piece (6) is embedded with an NTC thermistor (14), and the NTC thermistor (14) is electrically connected with the control module (22).

5. A system for preventing inadvertent actuation of a brake as defined in claim 2, wherein The contact surfaces of the first, second and third contacts (10, 11, 12) are provided with nano-ceramic liquid storage layers (15), the nano-ceramic liquid storage layers (15) are provided with a plurality of liquid storage holes (16), and each liquid storage hole (16) is filled with conductive lubricating grease.

6. A system for preventing inadvertent actuation of a brake as defined in claim 1, wherein The first and second contacts (10, 11) are filled with polyimide films (17), and the second and third contacts (11, 12) are filled with polyimide films (17).

7. A system for preventing inadvertent actuation of a brake as defined in claim 1, wherein The first contact (10), the second contact (11) and the third contact (12) are connected with the first arc-shaped plate (1) through elastic buffer pads (18).

8. A system for preventing inadvertent actuation of a brake as defined in claim 1, wherein The contact surface of the conductive elastic sheet (6) is provided with a plurality of elastic protrusions (19), and the plurality of elastic protrusions (19) are arranged in an array, and the top of each elastic protrusion (19) is a spherical surface structure.

9. A system for preventing inadvertent actuation of a brake as defined in claim 1, wherein The base of the first contact (10) is provided with a resistance wear sensor (20), and the resistance wear sensor (20) is electrically connected with the control module (22).

10. The system of claim 1, wherein, The sidewall of each screw rod (3) is embedded with a laser displacement sensor (21), the detection surface of the laser displacement sensor (21) faces the first contact (10), and the laser displacement sensor (21) is electrically connected with the control module (22).

Images