Methods, devices, vehicles, and media for measuring brake pedal wear

Abstract

This application provides a method, apparatus, vehicle, and medium for measuring brake pedal wear. The method includes: obtaining a target travel distance of the brake pedal under a target deceleration, wherein the target travel distance is determined based on the actual travel distance of the brake pedal under the target deceleration; obtaining a reference travel distance of the brake pedal under the target deceleration, wherein the reference travel distance is a pre-calibrated displacement change of the brake pedal under the target deceleration; and measuring the wear amount based on the target travel distance and the reference travel distance to obtain the wear amount of the brake pedal. This solves the technical problems of low measurement accuracy, measurement lag, and significant safety hazards in the prior art.

Description

Technical Field

[0001] This application relates to the field of automotive technology, specifically to a method, device, vehicle, and medium for measuring brake pedal wear. Background Technology

[0002] With the continuous growth of car ownership, vehicle safety is receiving increasing attention from car manufacturers and consumers. Statistics show that one of the major causes of traffic accidents is faulty braking, highlighting the crucial role of the vehicle's braking system in driving safety. Within the braking system, the brake pedal (also known as brake pads) is the most critical safety component, determining the effectiveness of all braking systems. Therefore, measuring brake pedal wear is extremely important for the safety of vehicle occupants.

[0003] Current technologies primarily rely on human vision, simple tools, or mechanical principles for measurement. For example, repair personnel or car owners visually inspect the brake pedal thickness by removing tires or looking through the wheel rim gaps, or use simple tools like calipers. These methods are cumbersome and susceptible to subjective factors, leading to inaccurate measurements. Another example is the use of physical warning discs embedded in the brake pedal to measure wear. However, these discs only trigger the alarm when the wear reaches a certain limit, by which time the brake pedal is nearing the end of its lifespan, exhibiting significant lag. Furthermore, they fail to provide drivers with real-time information about the brake pedal's wear, posing a considerable safety hazard. Summary of the Invention

[0004] In view of this, the embodiments of this application aim to provide a method, device, vehicle and medium for measuring brake pedal wear, which can solve the technical problems in the prior art such as low measurement accuracy, measurement lag and significant safety hazards.

[0005] In a first aspect, this application provides a method for measuring brake pedal wear, including: The target travel of the brake pedal is obtained at a target deceleration, wherein the target travel is determined based on the actual travel of the brake pedal at the target deceleration. Obtain the reference travel of the brake pedal of the vehicle at the target deceleration, wherein the reference travel is the displacement change of the brake pedal of the vehicle at the target deceleration as pre-calibrated; The wear amount of the brake pedal is obtained by measuring the wear amount based on the target stroke and the reference stroke.

[0006] In some embodiments, obtaining the target travel of the brake pedal at the target deceleration includes: Obtain the actual travel of the brake pedal of the vehicle at the target deceleration; The actual stroke is compensated for by setting factors to obtain the target stroke. The setting factor compensation includes temperature compensation and / or stiffness attenuation compensation.

[0007] In some embodiments, the setting factor compensation includes the temperature compensation, and the setting factor compensation of the actual stroke amount to obtain the target stroke amount includes: Obtain the real-time temperature of the braking system where the brake pedal is located; Based on the real-time temperature, a temperature compensation amount corresponding to the brake pedal is determined, and the temperature compensation amount is used to reflect the travel offset of the brake pedal at the real-time temperature; The actual travel distance is compensated based on the temperature compensation amount to obtain the target travel distance.

[0008] In some embodiments, the setting factor compensation includes stiffness attenuation compensation. The setting factor compensation is applied to the actual stroke to obtain the target stroke, including: With the brake pedal in a preset new state, the measured travel of the brake pedal at the target deceleration is obtained; Based on the measured stroke and the reference stroke, the stiffness attenuation compensation amount corresponding to the brake pedal is determined. The stiffness attenuation compensation amount is used to reflect the stroke change in which the braking system containing the brake pedal experiences stiffness attenuation. The target stroke is obtained by compensating the actual stroke based on the stiffness attenuation compensation amount.

[0009] In some embodiments, the step of measuring the wear amount based on the target travel amount and the reference travel amount to obtain the wear amount of the brake pedal includes: Based on the target travel amount and the baseline travel amount, determine the corresponding pedal travel increment; The wear amount of the brake pedal is obtained by converting the wear amount based on the pedal travel increment; wherein the wear amount is positively correlated with the pedal travel increment.

[0010] In some embodiments, obtaining the reference travel of the brake pedal at the target deceleration includes: The vehicle's multiple brake pedal strokes under the target deceleration are obtained, where the brake pedal stroke is the displacement change of the brake pedal under the target deceleration. The reference travel amount is obtained by statistically filtering the multiple brake pedal travels.

[0011] In some embodiments, the method further includes at least one of the following: When the wear of the brake pedal is within a preset first range, a first-level warning is issued based on the wear of the brake pedal. When the wear of the brake pedal is within a preset second range, a secondary warning is issued based on the wear of the brake pedal. When the wear of the brake pedal is within a preset third range, a three-level warning is issued based on the wear of the brake pedal. Record the wear of the brake pedal and the corresponding warning level; The wear level of the brake pedal and the corresponding warning level are uploaded to the cloud server; Wherein, the upper limit threshold of the preset first range is less than or equal to the lower limit threshold of the preset second range, the upper limit threshold of the preset second range is less than or equal to the lower limit threshold of the preset third range, and the warning levels of the first-level warning, the second-level warning, and the third-level warning increase sequentially.

[0012] Secondly, this application provides a device for measuring brake pedal wear, comprising: The acquisition module is used to acquire the target travel of the brake pedal of the vehicle at the target deceleration, wherein the target travel is determined based on the actual travel of the brake pedal of the vehicle at the target deceleration; The acquisition module is further configured to acquire the reference travel of the brake pedal of the vehicle under the target deceleration, wherein the reference travel is the displacement change of the brake pedal of the vehicle under the target deceleration as pre-calibrated. The processing module is used to measure the wear amount based on the target stroke and the reference stroke to obtain the wear amount of the brake pedal.

[0013] For any content not introduced or described in the embodiments of this application, please refer to the relevant descriptions in the foregoing method embodiments; they will not be repeated here.

[0014] Thirdly, this application provides a vehicle, including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute the executable instructions to implement the steps of the above-described method for measuring brake pedal wear.

[0015] Fourthly, this application provides a computer-readable storage medium storing computer program instructions thereon, which, when executed by a processor, implement the steps of the above-described method for measuring brake pedal wear.

[0016] The technical solution provided in this application embodiment can include the following beneficial effects: This application obtains the target travel amount of the brake pedal under a target deceleration, wherein the target travel amount is determined based on the actual travel amount of the brake pedal under the target deceleration; obtains the reference travel amount of the brake pedal under the target deceleration, wherein the reference travel amount is the displacement change of the brake pedal under the target deceleration as pre-calibrated; and measures the wear amount based on the target travel amount and the reference travel amount to obtain the wear amount of the brake pedal. Thus, this application can measure the wear amount based on the target travel amount and the reference travel amount of the brake pedal. Without changing the vehicle hardware or relying on other tools, it can measure the wear amount of the brake pedal in a low-cost, real-time, and accurate manner through software, thereby improving the efficiency, accuracy, and reliability of brake pedal wear measurement and avoiding vehicle safety problems caused by inaccurate brake pedal wear measurement. It also solves the technical problems of low measurement accuracy, measurement lag, and significant safety hazards existing in the prior art.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0019] Figure 1 This is a flowchart illustrating a method for measuring brake pedal wear according to an embodiment of this application.

[0020] Figure 2 This is a schematic diagram of a device for measuring brake pedal wear, provided in an embodiment of this application.

[0021] Figure 3 A schematic diagram of another brake pedal wear measuring device provided in an embodiment of this application.

[0022] Figure 4 This is a structural schematic diagram of a vehicle provided in an embodiment of this application. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] Unless otherwise defined, the technical or scientific terms used in the embodiments of this specification shall have the ordinary meaning understood by one of ordinary skill in the art to which this specification pertains. The terms "first," "second," and similar terms used in the embodiments of this specification do not indicate any order, quantity, or importance, but are merely used to avoid confusion of constituent elements.

[0025] Unless the context otherwise requires, throughout this specification, "a plurality of" means "at least two," and "including" is interpreted as open-ended or encompassing, that is, "including, but not limited to." In the description of this specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this specification. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example.

[0026] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0027] In the process of filing this application, the applicant discovered that existing methods for measuring brake pedal wear mainly include the following: First, manual visual inspection or measurement with simple tools. Specifically, repair personnel or vehicle owners visually inspect the brake pedal thickness by removing the tire or looking through the wheel hub gaps, or use simple tools such as calipers. This method cannot achieve real-time measurement, has significant latency, and relies on subjective experience. Second, mechanical warning disc alerts. Specifically, some vehicles embed physical warning discs in the brake pedal. When the brake pedal wear reaches its limit, the warning disc contacts the brake pedal, producing an abnormal noise, indicating that the brake pedal should be replaced. This method is a reactive alert, by which time the brake pedal is nearing the end of its lifespan, and the abnormal noise may cause discomfort. Third, direct thickness sensors. Specifically, a small number of high-end vehicles use wireless thickness sensors embedded in the brake pedal, requiring additional hardware costs. Furthermore, due to the harsh working environment of the brake pedal (e.g., high temperature, high pressure, or vibration), the sensor cannot reliably measure the wear of the brake pedal, facing reliability issues and hindering widespread adoption. To solve the above problems, this application proposes a method, device, vehicle, and medium for measuring brake pedal wear.

[0028] Please see Figure 1 This is a schematic flowchart of a method for measuring brake pedal wear provided in an embodiment of this application. Figure 1 The method shown can be applied to vehicles and may include the following implementation steps: S101. Obtain the target travel of the brake pedal under the target deceleration, wherein the target travel is determined based on the actual travel of the brake pedal under the target deceleration.

[0029] The target deceleration mentioned above in this application can refer to the deceleration of the vehicle during current driving, that is, the deceleration of the vehicle after the driver currently depresses the brake pedal. It can also be called the current deceleration, and this application will not limit or elaborate on it further. The target travel amount mentioned above can refer to the amount of travel that the brake pedal needs to be pressed when the vehicle is driven at the target deceleration. It can be determined based on the actual travel amount of the brake pedal when the vehicle is driven at the target deceleration (i.e., the actual travel amount). The specific implementation method for obtaining / determining the target travel amount will be described in detail below in this application, and will not be introduced in detail here. The travel amount involved in this application can refer to the displacement distance of the brake pedal after it is pressed, which can also be called the displacement change amount or travel amount. This application will not limit or elaborate on it further.

[0030] S102. Obtain the reference travel of the brake pedal of the vehicle at the target deceleration. The reference travel is the displacement change of the brake pedal of the vehicle at the target deceleration as pre-calibrated.

[0031] The aforementioned reference travel amount in this application can refer to the displacement change of the brake pedal obtained through experimental calibration under the aforementioned target deceleration, i.e., the travel amount. Specifically, for example, when the driver depresses the brake pedal to make the vehicle reach the target deceleration, the brake pedal travel sensor can collect the brake pedal travel signal under the target deceleration. The vehicle system can analyze the aforementioned brake pedal travel signal to obtain the reference travel amount of the brake pedal under the target deceleration, etc. This application will not elaborate further on this.

[0032] S103. Based on the target stroke and the reference stroke, the wear amount is measured to obtain the wear amount of the brake pedal.

[0033] By implementing the embodiments of this application, this application obtains the target travel of the brake pedal under a target deceleration, the target travel being determined based on the actual travel of the brake pedal under the target deceleration; it also obtains the reference travel of the brake pedal under the target deceleration, the reference travel being a pre-calibrated displacement change of the brake pedal under the target deceleration; and it measures the wear of the brake pedal based on the target travel and the reference travel to obtain the wear amount of the brake pedal. Thus, this application can measure the wear amount based on the target travel and reference travel of the brake pedal, obtaining the brake pedal wear amount in a low-cost, real-time, and accurate manner through software without changing the vehicle hardware or relying on other tools. This improves the efficiency, accuracy, and reliability of brake pedal wear measurement and avoids vehicle safety problems caused by inaccurate brake pedal wear measurement. It also solves the technical problems of low measurement accuracy, measurement lag, and significant safety hazards existing in the prior art.

[0034] The following describes some specific and optional embodiments related to this application.

[0035] In step S101, this application does not limit the implementation method for obtaining the target travel amount. For example, this application can first obtain the actual travel amount of the brake pedal under the target deceleration. Specifically, when this application detects that the vehicle is driving under the target deceleration, it can detect and collect the corresponding brake pedal travel signal through the brake pedal travel sensor, and obtain the actual travel amount of the brake pedal under the target deceleration from the signal. Next, this application can perform set factor compensation on the actual travel amount; when there are multiple set factors, it can also be called multi-factor compensation. The set factors can refer to factors that affect the brake pedal travel amount, which can include, but are not limited to, any combination of one or more of the following: temperature factor, stiffness attenuation factor, or other custom influencing factors. It is understood that the temperature change of the braking system where the brake pedal is located will affect the brake fluid viscosity and component deformation. Therefore, the system can integrate the temperature sensor data of the braking system to perform dynamic temperature compensation on the actual travel amount of the brake pedal. In addition, as the vehicle ages, the brake system pipelines, hoses and other components may have slight stiffness changes. Therefore, the system can perform stiffness attenuation compensation on the actual travel amount of the brake pedal to ensure the accuracy of the brake pedal travel amount.

[0036] This application does not limit the specific implementation of the above-mentioned setting factor compensation. For example, in one implementation, the above-mentioned setting factor compensation includes temperature compensation. This application can obtain the real-time temperature (also known as the current temperature) of the braking system where the brake pedal is located. Specifically, this application can obtain the real-time temperature of the braking system through a temperature sensor. Then, this application can determine the temperature compensation amount corresponding to the brake pedal based on the above-mentioned real-time temperature. This application does not limit the specific implementation of the determination of the above-mentioned temperature compensation amount. For example, this application can query the temperature compensation amount ΔS_temp that matches the above-mentioned real-time temperature from a pre-established temperature compensation mapping table. This temperature compensation mapping table is a mapping table obtained in advance by the system through experimental calibration. This mapping table records the mapping relationship between different temperatures and different temperature compensation amounts, wherein the temperature and the temperature compensation amount are mapped / corresponded one-to-one. For example, this application can simulate the travel amount of the brake pedal required to reach the same specific deceleration (such as the target deceleration) under different temperatures through bench testing; then, it calculates the offset between these travel amounts and the brake pedal travel amount at the reference temperature, thereby obtaining the temperature compensation amount of the brake pedal at different temperatures, i.e., the travel offset; this can then be stored in tabular form to obtain the aforementioned temperature compensation mapping table, which this application does not limit or elaborate on further. Finally, this application can compensate the actual travel amount of the brake pedal based on the aforementioned temperature compensation amount to obtain the aforementioned target travel amount; specifically, this application can add the actual travel amount of the brake pedal to the aforementioned temperature compensation amount to obtain the aforementioned target travel amount of the brake pedal. In practical applications, the aforementioned temperature compensation amount can be positive or negative, and it can be determined according to the actual needs of the system, which this application does not limit or elaborate on further.

[0037] In another embodiment, the aforementioned factor compensation includes stiffness attenuation compensation. When the brake pedal is in a preset new state, such as a new brake pedal after maintenance, this application can first obtain the measured travel of the brake pedal at the target deceleration. Specifically, for example, when the brake pedal is in a new state after maintenance / replacement, the driver depresses the brake pedal to bring the vehicle to the target deceleration, and the corresponding brake pedal travel signal is detected and collected by the brake pedal travel sensor, and the measured travel of the brake pedal at this time is analyzed from it. Next, this application can determine the stiffness attenuation compensation amount corresponding to the brake pedal based on the measured travel amount and the reference travel amount. Specifically, this application can subtract the reference travel amount from the measured travel amount to obtain the stiffness attenuation compensation amount ΔS_stiffness. The stiffness attenuation compensation amount represents the amount of brake pedal travel change caused by system aging. Finally, this application can compensate for the actual travel of the brake pedal based on the stiffness attenuation compensation amount to obtain the target travel amount; specifically, this application can subtract the stiffness attenuation compensation amount from the actual travel of the brake pedal to obtain the target travel amount of the brake pedal. Understandably, the essence of system stiffness decay is the increased elasticity of components such as brake lines and hoses due to vehicle aging. This results in an increase in brake fluid required to achieve the same braking force, specifically manifested as an increase in brake pedal travel. This excess travel (i.e., the aforementioned stiffness decay compensation ΔS_stiffness) is mixed into the normal / actual travel caused by brake pedal wear, leading to an overestimation of wear. Therefore, this application needs to subtract the aforementioned stiffness decay compensation ΔS_stiffness from the actual travel measured by the brake pedal to obtain the true target travel of the brake pedal.

[0038] In step S102, this application does not limit the implementation method for obtaining the aforementioned reference travel amount. Specifically, for example, this application can directly query and obtain the reference travel amount of the brake pedal under the target deceleration from the system's local database. The aforementioned local database records the reference travel amount of the brake pedal under different decelerations, and the aforementioned different decelerations include at least the aforementioned target deceleration. These reference travel amounts of the brake pedal under different decelerations are all obtained in advance through experimental calibration. Taking the reference travel amount of the brake pedal under the aforementioned target deceleration as an example, the vehicle can obtain / obtain multiple brake pedal travels by sampling the brake pedal travel multiple times (e.g., 20-30 times) under the target deceleration, that is, the travel amount of the brake pedal under the target deceleration at each sampling. Then, this application can perform statistical filtering on the aforementioned multiple brake pedal travels to obtain the aforementioned reference travel amount of the brake pedal under the target deceleration. This application does not limit the specific implementation of the above statistical filtering. For example, this application can remove the maximum and minimum values ​​from the multiple brake pedal travels; that is, remove the maximum and minimum values ​​from the multiple brake pedal travels to eliminate interference from accidental factors such as brake system clearance and temperature, and ensure the accuracy of subsequent calculations. Then, this application can calculate the average value of all remaining brake pedal travels after removal, thereby obtaining the reference travel amount of the brake pedal at the target deceleration, etc., and this application does not impose further limitations on this.

[0039] In step S103, this application does not limit the specific implementation of the above-mentioned wear measurement. For example, this application can determine the corresponding pedal travel increment based on the above-mentioned target travel amount and the above-mentioned reference travel amount; specifically, this application can subtract the above-mentioned target travel amount from the above-mentioned reference travel amount to obtain the pedal travel increment of the brake pedal. Then, this application can perform wear conversion / transformation based on the above-mentioned pedal travel increment to obtain the wear amount of the brake pedal. Among them, the wear amount and the pedal travel increment are positively correlated. Generally, the larger the pedal travel increment, the greater the wear amount of the brake pedal; conversely, the smaller the pedal travel increment, the smaller the wear amount of the brake pedal. This application does not limit the specific implementation of the above-mentioned wear conversion. For example, the following formula (1) shows a specific formula for wear conversion: Formula (1) Where M represents the wear of the brake pedal. △S represents the aforementioned pedal travel increment. S1 represents the target travel of the brake pedal at the target deceleration. S0 represents the reference travel of the brake pedal at the target deceleration. k represents the wear thickness of the brake pedal corresponding to a unit pedal travel increment, which is usually a parameter obtained in advance through extensive bench testing; this application will not impose further limitations or details on it.

[0040] In some optional embodiments, after obtaining the wear amount of the brake pedal, this application can provide graded warnings based on the wear amount. For example, it can provide progressive warnings based on the range of wear amount. Specifically, when the wear amount of the brake pedal is within a preset first range, this application can provide a level one warning. When the wear amount of the brake pedal is within a preset second range, this application can provide a level two warning; when the wear amount of the brake pedal is within a preset third range, this application can provide a level three warning. The preset first range, the preset second range, and the preset third range are all warning ranges pre-defined by the system according to actual conditions, and the level one, level two, and level three warnings are graded warnings pre-defined by the system according to actual conditions. For example, when the upper limit of the aforementioned preset first range is less than or equal to the lower limit of the aforementioned preset second range, and the upper limit of the aforementioned preset second range is less than or equal to the lower limit of the aforementioned preset third range, the warning levels corresponding to the aforementioned first-level warning, the aforementioned second-level warning, and the aforementioned third-level warning increase sequentially, that is, the warning level of the aforementioned first-level warning is less than the warning level of the aforementioned second-level warning is less than the warning level of the aforementioned third-level warning; for example, the aforementioned first-level warning can be a reminder warning, the aforementioned second-level warning can be a suggestion warning, and the aforementioned third-level warning can be a warning warning, etc., and this application does not impose too many limitations on this. This application does not limit the specific warning implementation methods corresponding to the aforementioned first-level warning, the aforementioned second-level warning, and the aforementioned third-level warning. For example, when the wear of the aforementioned brake pedal is greater than 50% and less than 80% (i.e., within the preset first range), this application can display corresponding text prompt information through the vehicle dashboard, such as "Brake pedal / brake pad wear has reached more than 50%, please pay attention" to issue a first-level warning. When the wear of the aforementioned brake pedal is greater than or equal to 80% but less than 90% (i.e., within the preset second range), this application can display a secondary warning via the information center or central control screen, such as "It is recommended to plan to replace the brake pedal / brake pads," accompanied by a corresponding prompt sound. When the wear of the aforementioned brake pedal is greater than or equal to 90% (i.e., within the preset third range), this application can continuously display warning icons and text, and frequently prompt and strongly recommend immediate repair, etc., to provide a tertiary warning. This application will not impose further limitations or details on this aspect.

[0041] In some alternative embodiments, this application may record the wear amount of the brake pedal and its corresponding level of warning / warning event, for example, the wear amount of the brake pedal, i.e. the specific warning event corresponding to the wear amount, may be recorded in a local database for the convenience of the driver to view or use later.

[0042] In another optional embodiment, this application can upload the wear amount of the brake pedal and its corresponding level of warning / warning event to the cloud server in real time or periodically via the Internet of Vehicles, so that the cloud can actively monitor it, such as reminding fleet management or after-sales service providers to prepare brake pedal parts in advance, or proactively contacting vehicle owners to replace them, thereby ensuring the safety of vehicle driving.

[0043] It should be noted that the above-mentioned optional embodiments can be implemented individually or in combination with any two or more of them depending on the actual situation. This application does not impose any further limitations or details on this.

[0044] As can be seen, this application learns and calibrates the baseline travel of the brake pedal under a specific deceleration, and continuously monitors the target travel of the brake pedal at the current target deceleration throughout the vehicle's life cycle. The wear of the brake pedal is calculated in real time using the travel increment between the target travel and the baseline travel, thus achieving real-time and continuous monitoring of brake pedal wear. This overcomes the lag inherent in existing periodic manual inspections, enabling the vehicle to continuously perceive brake pedal wear and providing a basis for predictive maintenance. It also significantly reduces system costs and complexity; for example, by reusing existing or mass-produced standard brake pedal travel sensors, no additional hardware is required, making it highly valuable for market promotion. Furthermore, it enables accurate predictive maintenance warnings; for instance, by establishing a conversion formula between travel increments and wear amounts through software, warnings can be issued before wear reaches its limit, avoiding potential safety hazards and improving vehicle safety and planning. In its specific implementation, this application obtains the target travel of the brake pedal under a target deceleration, the target travel being determined based on the actual travel of the brake pedal under the target deceleration; it also obtains the reference travel of the brake pedal under the target deceleration, the reference travel being a pre-calibrated displacement change of the brake pedal under the target deceleration; and it measures the wear of the brake pedal based on the target travel and the reference travel to obtain the wear amount of the brake pedal. Thus, this application can measure the wear amount based on the target travel and reference travel of the brake pedal, obtaining the brake pedal wear amount in a low-cost, real-time, and accurate manner through software without changing the vehicle hardware or relying on other tools. This improves the efficiency, accuracy, and reliability of brake pedal wear measurement and avoids vehicle safety problems caused by inaccurate brake pedal wear measurement. It also solves the technical problems of low measurement accuracy, measurement lag, and significant safety hazards existing in the prior art.

[0045] Based on the above embodiments, please refer to Figure 2 This is a schematic diagram of a brake pedal wear measuring device provided in an embodiment of this application. Figure 2The apparatus 200 shown may include an acquisition module 201 and a processing module 202, wherein: The acquisition module 201 is used to acquire the target travel amount of the brake pedal under the target deceleration of the vehicle, wherein the target travel amount is determined based on the actual travel amount of the brake pedal under the target deceleration of the vehicle; The acquisition module 201 is further configured to acquire the reference travel of the brake pedal of the vehicle under the target deceleration, wherein the reference travel is the displacement change of the brake pedal of the vehicle under the target deceleration as pre-calibrated. The processing module 202 is used to measure the wear amount based on the target stroke amount and the reference stroke amount to obtain the wear amount of the brake pedal.

[0046] In some embodiments, the acquisition module 201 is specifically used for: Obtain the actual travel of the brake pedal of the vehicle at the target deceleration; The actual stroke is compensated for by setting factors to obtain the target stroke. The setting factor compensation includes temperature compensation and / or stiffness attenuation compensation.

[0047] In some embodiments, the setting factor compensation includes the temperature compensation, and the acquisition module 201 is specifically used for: Obtain the real-time temperature of the braking system where the brake pedal is located; Based on the real-time temperature, a temperature compensation amount corresponding to the brake pedal is determined, and the temperature compensation amount is used to reflect the travel offset of the brake pedal at the real-time temperature; The actual travel distance is compensated based on the temperature compensation amount to obtain the target travel distance.

[0048] In some embodiments, the setting factor compensation includes stiffness attenuation compensation, and the acquisition module 201 is specifically used for: With the brake pedal in a preset new state, the measured travel of the brake pedal at the target deceleration is obtained; Based on the measured stroke and the reference stroke, the stiffness attenuation compensation amount corresponding to the brake pedal is determined. The stiffness attenuation compensation amount is used to reflect the stroke change in which the braking system containing the brake pedal experiences stiffness attenuation. The target stroke is obtained by compensating the actual stroke based on the stiffness attenuation compensation amount.

[0049] In some embodiments, the processing module 202 is specifically used for: Based on the target travel amount and the baseline travel amount, determine the corresponding pedal travel increment; The wear amount of the brake pedal is obtained by converting the wear amount based on the pedal travel increment; wherein the wear amount is positively correlated with the pedal travel increment.

[0050] In some embodiments, the acquisition module 201 is specifically used for: The vehicle's multiple brake pedal strokes under the target deceleration are obtained, where the brake pedal stroke is the displacement change of the brake pedal under the target deceleration. The reference travel amount is obtained by statistically filtering the multiple brake pedal travels.

[0051] In some embodiments, the processing module 202 is further configured to perform at least one of the following: When the wear of the brake pedal is within a preset first range, a first-level warning is issued based on the wear of the brake pedal. When the wear of the brake pedal is within a preset second range, a secondary warning is issued based on the wear of the brake pedal. When the wear of the brake pedal is within a preset third range, a three-level warning is issued based on the wear of the brake pedal. Record the wear of the brake pedal and the corresponding warning level; The wear level of the brake pedal and the corresponding warning level are uploaded to the cloud server; Wherein, the upper limit threshold of the preset first range is less than or equal to the lower limit threshold of the preset second range, the upper limit threshold of the preset second range is less than or equal to the lower limit threshold of the preset third range, and the warning levels of the first-level warning, the second-level warning, and the third-level warning increase sequentially.

[0052] Please see Figure 3 This is a schematic diagram of another brake pedal wear measuring device provided in an embodiment of this application. Figure 3 The device shown can be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc. This device can be applied to various types of vehicles, etc.

[0053] Reference Figure 3 The device 300 may include one or more of the following components: processing component 302, memory 304, power supply component 306, multimedia component 308, audio component 310, input / output interface 312, sensor component 314, and communication component 316.

[0054] Processing component 302 typically controls the overall operation of device 300, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 302 may include one or more processors 320 to execute instructions to complete all or part of the steps of the aforementioned brake pedal wear measurement method. Furthermore, processing component 302 may include one or more modules to facilitate interaction between processing component 302 and other components. For example, processing component 302 may include a multimedia module to facilitate interaction between multimedia component 308 and processing component 302.

[0055] Memory 304 is configured to store various types of data to support the operation of device 300. Examples of such data include instructions for any application or method operating on device 300, contact data, phonebook data, messages, pictures, videos, etc. Memory 304 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0056] Power supply component 306 provides power to various components of device 300. Power supply component 306 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to device 300.

[0057] Multimedia component 308 includes a screen that provides an output interface between the device 300 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 308 includes a front-facing camera and / or a rear-facing camera. When the device 300 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0058] Audio component 310 is configured to output and / or input audio signals. For example, audio component 310 includes a microphone (MIC) configured to receive external audio signals when device 300 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 304 or transmitted via communication component 316. In some embodiments, audio component 310 also includes a speaker for outputting audio signals.

[0059] Input / output interface 312 provides an interface between processing component 302 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, start buttons, and lock buttons.

[0060] Sensor assembly 314 includes one or more sensors for providing status assessments of various aspects of device 300. For example, sensor assembly 314 may detect the on / off state of device 300, the relative positioning of components such as the display and keypad of device 300, changes in the position of device 300 or a component of device 300, the presence or absence of user contact with device 300, the orientation or acceleration / deceleration of device 300, and temperature changes of device 300. Sensor assembly 314 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 314 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 314 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0061] Communication component 316 is configured to facilitate wired or wireless communication between device 300 and other devices. Device 300 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 316 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 316 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0062] In an exemplary embodiment, the device 300 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described method for measuring brake pedal wear.

[0063] Understandably, the processor 320 in this embodiment can be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method embodiment can be completed by integrated logic circuits in the processor's hardware or by software instructions. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0064] Understandably, the memory 304 in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0065] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 304 including instructions, which can be executed by a processor 320 of the device 300 to complete the aforementioned method for measuring the wear of the upper brake pedal. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0066] The aforementioned device can be a standalone electronic device or a part of a standalone electronic device. For example, in one embodiment, the device can be an integrated circuit (IC) or a chip, wherein the integrated circuit can be a single IC or a collection of multiple ICs. The chip can include, but is not limited to, the following types: GPU (Graphics Processing Unit), CPU (Central Processing Unit), FPGA (Field Programmable Gate Array), DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), and SoC (System on Chip). The aforementioned integrated circuit or chip can be used to execute executable instructions (or code) to implement the aforementioned method for measuring brake pedal wear. These executable instructions can be stored in the integrated circuit or chip or obtained from other devices or equipment. For example, the integrated circuit or chip may include a processor, memory, and an interface for communicating with other devices. The executable instruction can be stored in the memory, and when the executable instruction is executed by the processor, it implements the above-mentioned method for measuring brake pedal wear; or, the integrated circuit or chip can receive the executable instruction through the interface and transmit it to the processor for execution to implement the above-mentioned method for measuring brake pedal wear.

[0067] Please see Figure 4 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this application. For example, as shown... Figure 4 As shown, the vehicle 400 includes a memory 401 and a processor 402. The memory 401 stores executable program code 4011, and the processor 402 is used to call and execute the executable program code 4011 to perform a method for measuring brake pedal wear.

[0068] This application embodiment can divide the vehicle into functional modules according to the above method embodiment. For example, each function can be assigned to a separate module, or two or more functions can be integrated into a processing module. The integrated module can be implemented in hardware. It should be noted that the module division in this embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. When dividing each functional module according to its corresponding function, the vehicle may include a processing module and a communication module, etc.

[0069] It should be noted that all relevant content of each step involved in the above method embodiments can be referenced from the functional description of the corresponding functional module, and will not be repeated here. The vehicle provided in this embodiment is used to perform the above-described method for measuring brake pedal wear, and therefore can achieve the same effect as the above-described implementation method.

[0070] In another exemplary embodiment, a computer program product is also provided, comprising a computer program executable by a programmable device, the computer program having a code portion for performing the aforementioned method for measuring brake pedal wear when executed by the programmable device.

[0071] It should be noted that the descriptions of the above embodiments of storage media, devices, and equipment are similar to the descriptions of the above method embodiments, and have similar beneficial effects. For technical details not disclosed in the embodiments of storage media, devices, and equipment of this application, please refer to the descriptions of the method embodiments of this application for understanding.

[0072] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of this application. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed in this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0073] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for measuring brake pedal wear, characterized in that, include: The target travel of the brake pedal is obtained at a target deceleration, wherein the target travel is determined based on the actual travel of the brake pedal at the target deceleration. Obtain the reference travel of the brake pedal of the vehicle at the target deceleration, wherein the reference travel is the displacement change of the brake pedal of the vehicle at the target deceleration as pre-calibrated; The wear amount of the brake pedal is obtained by measuring the wear amount based on the target stroke and the reference stroke.

2. The method according to claim 1, characterized in that, The process of obtaining the target travel of the brake pedal at the target deceleration includes: Obtain the actual travel of the brake pedal of the vehicle at the target deceleration; The actual stroke is compensated for by setting factors to obtain the target stroke. The setting factor compensation includes temperature compensation and / or stiffness attenuation compensation.

3. The method according to claim 2, characterized in that, The set factor compensation includes the temperature compensation, and the set factor compensation of the actual stroke amount to obtain the target stroke amount includes: Obtain the real-time temperature of the braking system where the brake pedal is located; Based on the real-time temperature, a temperature compensation amount corresponding to the brake pedal is determined, and the temperature compensation amount is used to reflect the travel offset of the brake pedal at the real-time temperature; The actual travel distance is compensated based on the temperature compensation amount to obtain the target travel distance.

4. The method according to claim 2, characterized in that, The set factor compensation includes stiffness attenuation compensation. The actual stroke is compensated using set factor compensation to obtain the target stroke, which includes: With the brake pedal in a preset new state, the measured travel of the brake pedal at the target deceleration is obtained; Based on the measured stroke and the reference stroke, the stiffness attenuation compensation amount corresponding to the brake pedal is determined. The stiffness attenuation compensation amount is used to reflect the stroke change in which the braking system containing the brake pedal experiences stiffness attenuation. The target stroke is obtained by compensating the actual stroke based on the stiffness attenuation compensation amount.

5. The method according to claim 1, characterized in that, The method of measuring the wear amount based on the target travel amount and the reference travel amount to obtain the wear amount of the brake pedal includes: Based on the target travel amount and the baseline travel amount, determine the corresponding pedal travel increment; The wear amount of the brake pedal is obtained by converting the wear amount based on the pedal travel increment; wherein the wear amount is positively correlated with the pedal travel increment.

6. The method according to claim 1, characterized in that, The process of obtaining the reference travel of the brake pedal at the target deceleration includes: The vehicle's multiple brake pedal strokes under the target deceleration are obtained, where the brake pedal stroke is the displacement change of the brake pedal under the target deceleration. The reference travel amount is obtained by statistically filtering the multiple brake pedal travels.

7. The method according to any one of claims 1-6, characterized in that, The method further includes at least one of the following: When the wear of the brake pedal is within a preset first range, a first-level warning is issued based on the wear of the brake pedal. When the wear of the brake pedal is within a preset second range, a secondary warning is issued based on the wear of the brake pedal. When the wear of the brake pedal is within a preset third range, a three-level warning is issued based on the wear of the brake pedal. Record the wear of the brake pedal and the corresponding warning level; The wear level of the brake pedal and the corresponding warning level are uploaded to the cloud server; Wherein, the upper limit threshold of the preset first range is less than or equal to the lower limit threshold of the preset second range, the upper limit threshold of the preset second range is less than or equal to the lower limit threshold of the preset third range, and the warning levels of the first-level warning, the second-level warning, and the third-level warning increase sequentially.

8. A device for measuring brake pedal wear, characterized in that, include: The acquisition module is used to acquire the target travel of the brake pedal of the vehicle at the target deceleration, wherein the target travel is determined based on the actual travel of the brake pedal of the vehicle at the target deceleration; The acquisition module is further configured to acquire the reference travel of the brake pedal of the vehicle under the target deceleration, wherein the reference travel is the displacement change of the brake pedal of the vehicle under the target deceleration as pre-calibrated. The processing module is used to measure the wear amount based on the target stroke and the reference stroke to obtain the wear amount of the brake pedal.

9. A vehicle, characterized in that, include: processor; A memory for storing processor-executable instructions; wherein the processor is configured to execute the executable instructions to implement the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having computer program instructions stored thereon, characterized in that, When the computer program instructions are executed by the processor, they implement the steps of the method according to any one of claims 1 to 7.

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