Vehicle brake disc temperature determination method and device and electronic equipment

Abstract

The invention discloses a method and device for determining the temperature of a vehicle brake disc and electronic equipment, and relates to the technical field of vehicle control. The method comprises the steps that in the running process of a vehicle, environment information, speed information and pressure information of a brake disc of an area where the vehicle is located at a target moment are collected, and the environment information at least comprises temperature information, humidity information, wind speed information and weather information; and according to the brake disc temperature of the brake disc of the vehicle at the first moment, the environment information, the speed information of the vehicle and the pressure information of the brake disc, the temperature of the brake disc of the vehicle at the target moment is determined, and the first moment is before the target moment. The technical problem that in the prior art, the temperature of the brake disc is estimated according to heating, convection, heat conduction, heat radiation and other factors generated by friction caused by braking force, and due to the fact that the factors are not considered comprehensively, the temperature estimation error of the brake disc is large is solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a method, device and electronic device for determining the temperature of a vehicle brake disc. Background Art

[0002] During the driving process, the braking system of the car is an important guarantee to ensure that the car can slow down and stop normally. This function is crucial to ensure the safety of the driver, so it is necessary to ensure that the car has good braking performance at all times. However, since the vehicle braking will cause the temperature of the car brake disc to rise, if the brake is braked for a long time, after the temperature of the brake disc rises sharply to a certain temperature, its braking efficiency will be greatly reduced, resulting in insufficient braking force of the car, increased braking distance, and a series of traffic accidents.

[0003] In addition, the brake control system, such as the electronic stability system of the car body, will adjust its control strategy according to the temperature of the brake disc to better ensure the stability of the car body and the safety of the driver. The electronic parking system of the car will also adjust the parking clamping force according to the temperature of the brake disc to prevent the car from slipping due to insufficient parking clamping force caused by the temperature drop after parking. However, since the brake disc is a rotating part with high temperature and frequent wear, it is difficult to install a temperature sensor directly on the brake disc. At the same time, in order to reduce costs, many vehicles basically do not specially design a solution for installing a brake disc temperature sensor. Therefore, it is very necessary to estimate the temperature of the brake disc.

[0004] At present, in the prior art, the brake disc temperature is mainly estimated based on thermal balance, that is, considering the change of the brake disc temperature, which is subject to factors such as heating and convection, heat conduction, and heat radiation caused by friction caused by power, the current brake disc temperature can be estimated based on the ambient temperature and the thermodynamic temperature of heating and heat dissipation. However, this estimation method generally uses a fixed simplified formula to fit and estimate the temperature, and does not consider the impact of environmental conditions and mounting structure on the brake disc temperature. Therefore, this estimation method is not accurate and reliable.

[0005] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0006] The embodiments of the present application provide a method, device and electronic device for determining the temperature of a vehicle brake disc, so as to at least solve the technical problem in the prior art of estimating the temperature of the brake disc based on factors such as heating and convection, heat conduction, and heat radiation generated by friction caused by the braking force, and resulting in large errors in the estimation of the brake disc temperature due to insufficient consideration of these factors.

[0007] According to one aspect of an embodiment of the present application, a method for determining the temperature of a vehicle brake disc is provided, comprising: during vehicle driving, collecting environmental information of the area where the vehicle is located, vehicle speed information, and brake disc pressure information at a target moment, wherein the environmental information includes at least temperature information, humidity information, wind speed information, and weather information; determining the temperature of the vehicle's brake disc at a target moment based on the brake disc temperature of the vehicle's brake disc at a first moment, the environmental information, the vehicle speed information, and the brake disc pressure information, wherein the first moment is before the target moment.

[0008] Optionally, in the method for determining the vehicle brake disc temperature provided in the present application, environmental information of the area where the vehicle is located at a target time is obtained during vehicle driving, including: when it is detected that the area where the vehicle is located is raining at the target time, the rainfall information of the area where the vehicle is located is determined by a rain sensor on the vehicle or an image of the front windshield of the vehicle under rainy weather; and the rainfall information is used as weather information in the environmental information.

[0009] Optionally, in the method for determining the vehicle brake disc temperature provided in the present application, when it is detected that the area where the vehicle is located is raining at the target moment, rainfall information in the area where the vehicle is located is determined by a rain sensor on the vehicle or a captured image of the vehicle's windshield in the rain, including: when a rain sensor is provided on the vehicle, determining the rainfall information in the area where the vehicle is located by the rain sensor; when no rain sensor is provided on the vehicle, capturing an image of the vehicle's windshield in the rain by an image acquisition device; determining the rainfall information based on the image and a rainfall calculation model, wherein the training image of the rainfall calculation model is an image of the windshield taken on historical rainy days, and the training label of the rainfall calculation model is the actual rainfall on historical rainy days.

[0010] Optionally, in the method for determining the temperature of a vehicle brake disc provided in the present application, before determining the temperature of the vehicle's brake disc at a target moment based on the brake disc temperature of the vehicle at a first moment, environmental information, vehicle speed information, and brake disc pressure information, the method for determining the temperature of the vehicle brake disc also includes: detecting whether the target moment is the power-on start moment of the vehicle's electronic control unit; when it is detected that the target moment is not the power-on start moment of the electronic control unit, taking a historical moment that is separated from the target moment by a preset time length as the first moment, wherein the code in the electronic control unit is executed once every preset time length.

[0011] Optionally, in the method for determining the temperature of a vehicle brake disc provided in the present application, before determining the temperature of the vehicle's brake disc at a target moment based on the brake disc temperature of the vehicle at a first moment, environmental information, vehicle speed information, and brake disc pressure information, the method for determining the temperature of the vehicle brake disc also includes: when it is detected that the target moment is the power-on start moment of the electronic control unit, obtaining the moment when the electronic control unit last stopped running the code; and taking the moment when the electronic control unit last stopped running the code as the first moment.

[0012] Optionally, in the method for determining the temperature of a vehicle brake disc provided in the present application, the temperature of the vehicle's brake disc at a target moment is determined based on the brake disc temperature of the vehicle at a first moment, environmental information, vehicle speed information, and brake disc pressure information, including: calculating the interval duration between the first moment and the target moment; determining the temperature of the vehicle's brake disc at the target moment based on the brake disc temperature of the vehicle at the first moment, environmental information, vehicle speed information, brake disc pressure information, and the interval duration.

[0013] Optionally, in the method for determining the temperature of a vehicle brake disc provided in the present application, the temperature of the vehicle's brake disc at a target moment is determined based on the brake disc temperature of the brake disc at a first moment, environmental information, vehicle speed information, brake disc pressure information, and interval duration, including: converting the brake disc temperature of the brake disc at the first moment, environmental information, vehicle speed information, brake disc pressure information, and interval duration into a feature vector; inputting the feature vector into a target model, and determining the temperature of the brake disc at the target moment based on the feature vector through the prior knowledge learned by the target model in the model training phase, wherein the training data of the target model includes the brake disc temperature, environmental information, vehicle speed information, brake disc pressure information, and the interval duration between the historical moment and the second moment at the historical moment, and the training label of the target model is the brake disc temperature at the second moment, wherein the second moment is after the historical moment.

[0014] Optionally, in the method for determining the temperature of a vehicle brake disc provided in the present application, after determining the temperature of the vehicle's brake disc at a target moment based on the brake disc temperature of the vehicle at a first moment, environmental information, vehicle speed information, and brake disc pressure information, the method for determining the temperature of the vehicle brake disc also includes: detecting whether the vehicle's electronic control unit stops running the code; if it is detected that the electronic control unit has not stopped running the code, re-determining the latest temperature of the brake disc each time the code is executed; if it is detected that the vehicle's electronic control unit stops running the code at any moment, recording the time when the code stops running, and recording the temperature of the brake disc at the time when the code stops running.

[0015] According to another aspect of the present application, a device for determining the temperature of a vehicle brake disc is also provided, which includes: a collection unit, used to collect environmental information of the area where the vehicle is located, vehicle speed information and brake disc pressure information at a target time during vehicle driving, wherein the environmental information includes at least temperature information, humidity information, wind speed information and weather information; a determination unit, used to determine the temperature of the vehicle's brake disc at a target time based on the brake disc temperature of the vehicle at a first time, environmental information, vehicle speed information and brake disc pressure information, wherein the first time is before the target time.

[0016] According to another aspect of the present application, an electronic device is also provided, wherein the electronic device includes one or more processors and a memory, the memory being used to store one or more programs, wherein when the one or more programs are executed by one or more processors, the one or more processors execute the above-mentioned method for determining the vehicle brake disc temperature.

[0017] In the present application, firstly, during the driving process of the vehicle, the environmental information of the area where the vehicle is located, the speed information of the vehicle, and the pressure information of the brake disc are collected at the target time, wherein the environmental information at least includes temperature information, humidity information, wind speed information, and weather information. Then, according to the brake disc temperature of the vehicle's brake disc at the first moment, the environmental information, the speed information of the vehicle, and the pressure information of the brake disc, the temperature of the vehicle's brake disc at the target moment is determined, wherein the first moment is before the target moment.

[0018] From the above content, it can be seen that the present application comprehensively considers the factors affecting the brake disc temperature according to the current environmental conditions, such as wind speed, ambient humidity, ambient temperature and weather information, combined with the vehicle speed information (such as the vehicle's driving speed and the wheel speed) and the brake disc pressure information, so as to more accurately fit the brake disc temperature change model, and then obtain a more accurate brake disc temperature, thereby solving the technical problem in the prior art of estimating the brake disc temperature based on the heating and convection, heat conduction, thermal radiation and other factors generated by the friction caused by the braking force, and the large error in the brake disc temperature estimation due to insufficient consideration of the factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 is a flow chart of an optional method for determining the temperature of a vehicle brake disc according to an embodiment of the present application;

[0021] Figure 2is a flow chart of an optional process for determining the temperature of a vehicle brake disc according to an embodiment of the present application;

[0022] Figure 3 It is a schematic diagram of an optional device for determining the temperature of a vehicle brake disc according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] It should also be noted that the information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) collected by this application are information and data authorized by the user or fully authorized by all parties, and the collection, storage, use, processing, transmission, provision, disclosure and application of relevant data are in compliance with the relevant laws, regulations and standards of the relevant regions, necessary confidentiality measures are taken, and public order and good customs are not violated, and corresponding operation portals are provided for users to choose to authorize or refuse. For example, an interface is set up between this system and relevant users or organizations. Before obtaining relevant information, it is necessary to send an acquisition request to the aforementioned user or organization through the interface, and obtain relevant information after receiving the consent information fed back by the aforementioned user or organization.

[0026] According to an embodiment of the present application, an embodiment of a method for determining the temperature of a vehicle brake disc is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0027] Figure 1 is a flow chart of an optional method for determining the temperature of a vehicle brake disc according to an embodiment of the present application, such as Figure 1 As shown, the method comprises the following steps:

[0028] Step S101 , during the driving process of the vehicle, collecting environmental information of the area where the vehicle is located, vehicle speed information and brake disc pressure information at the target time.

[0029] In step S101 , the environmental information includes at least temperature information, humidity information, wind speed information and weather information.

[0030] Optionally, Figure 2 is a flow chart of an optional process for determining the vehicle brake disc temperature according to an embodiment of the present application, such as Figure 2 As shown, when the ECU (electronic control unit) of the vehicle's brake assembly is powered on, the ECU can obtain the current wind speed information, ambient humidity information, weather information and other information outside the vehicle through the networked multimedia on the vehicle.

[0031] Alternatively, if Figure 2 As shown, the ECU can obtain vehicle speed information, wheel speed information, brake disc pressure information and ambient temperature information through sensors. The information is transmitted between the sensor and the ECU via the CAN bus.

[0032] In an optional embodiment, an environmental information collection system, a vehicle speed information collection system, a brake disc pressure information collection system, and a brake system status monitoring system may be deployed on the vehicle.

[0033] Among them, the environmental information collection system may include temperature sensors, humidity sensors, anemometers, and weather monitoring sensors. Among them, the temperature sensor can be installed on the outside of the vehicle to monitor the temperature of the vehicle's surrounding environment in real time; the humidity sensor can also be installed on the outside of the vehicle to measure the humidity level in the air; the anemometer can be installed on the front or top of the vehicle to measure wind speed and direction; the weather monitoring sensor integrates raindrop sensors, snow detectors, etc., to detect current weather conditions, such as rain, snow, fog, etc.

[0034] Secondly, the vehicle speed information collection system includes speed sensors and positioning systems. The speed sensors are usually installed on wheels or engines to measure the real-time speed of the vehicle; the positioning system is used to provide the precise location and speed information of the vehicle, and can also be used for navigation and route planning.

[0035] In addition, the brake disc pressure information acquisition system can include a pressure sensor, which is installed on the brake system to monitor the pressure of the brake disc to ensure braking efficiency and safety. The brake system status monitoring system can monitor the brake fluid level, brake pad wear, etc. through sensors to prevent potential braking problems.

[0036] Step S102, determining the temperature of the brake disc of the vehicle at a target time according to the brake disc temperature of the brake disc of the vehicle at a first time, environmental information, vehicle speed information, and brake disc pressure information.

[0037] In step S102, the first time is before the target time.

[0038] Optionally, a mathematical model can be pre-established, which can predict the temperature change of the brake disc based on the initial temperature of the brake disc, environmental information, vehicle speed and brake disc pressure. The mathematical model can be based on physical principles such as heat conduction, heat convection and heat radiation, as well as friction heat generation during braking. The collected data is input into the model, and the input data includes the brake disc temperature, environmental information, vehicle speed and brake disc pressure at the first moment. Then, the model is used to calculate the change in brake disc temperature from the first moment to the target moment. The model considers the heat accumulation and heat dissipation effect during braking, as well as the influence of environmental factors on temperature during calculation. Finally, the model is simulated to predict the brake disc temperature at the target moment. Numerical methods, such as finite difference method or finite element method, can be used to solve the temperature equation in the model.

[0039] In addition, a brake disc temperature estimation model can be designed and trained in advance, wherein the brake disc temperature estimation model can be a neural network model. For example, in order to reduce the amount of calculation, a lightweight network such as a BP neural network with a small amount of calculation can be selected for training. The ECU can predict the temperature of the vehicle's brake disc at the target time based on the brake disc temperature of the vehicle at the first moment, environmental information, vehicle speed information, and brake disc pressure information through the prior knowledge learned by the brake disc temperature estimation model during the model training phase.

[0040] Based on the contents of the above steps S101 to S102, it can be known that in the present application, firstly, during the driving of the vehicle, the environmental information of the area where the vehicle is located, the speed information of the vehicle, and the pressure information of the brake disc are collected at the target time, wherein the environmental information at least includes temperature information, humidity information, wind speed information, and weather information. Then, according to the brake disc temperature of the vehicle's brake disc at the first moment, the environmental information, the speed information of the vehicle, and the pressure information of the brake disc, the temperature of the vehicle's brake disc at the target moment is determined, wherein the first moment is before the target moment.

[0041] From the above content, it can be seen that the present application comprehensively considers the factors affecting the brake disc temperature according to the current environmental conditions, such as wind speed, ambient humidity, ambient temperature and weather information, combined with the vehicle speed information (such as the vehicle's driving speed and the wheel speed) and the brake disc pressure information, so as to more accurately fit the brake disc temperature change model, and then obtain a more accurate brake disc temperature, thereby solving the technical problem in the prior art of estimating the brake disc temperature based on the heating and convection, heat conduction, thermal radiation and other factors generated by the friction caused by the braking force, and the large error in the brake disc temperature estimation due to insufficient consideration of the factors.

[0042] In an optional embodiment, during the driving of the vehicle, environmental information of the area where the vehicle is located at a target time is obtained, including: when it is detected that the area where the vehicle is located is raining at the target time, the rainfall information of the area where the vehicle is located is determined by a rain sensor on the vehicle or an image of the front windshield of the vehicle under rainy weather; and the rainfall information is used as the weather information in the environmental information.

[0043] Optionally, when it is detected that the area where the vehicle is located is raining at the target time, the ECU can obtain rainfall information in the area where the vehicle is located, and use the rainfall information as weather information in the environmental information, and use the rainfall information as a reference factor when estimating the brake disc temperature.

[0044] It should be noted that rainfall information will affect the heat dissipation efficiency of the brake disc to a certain extent. For example, the greater the rainfall, the greater the water flow outside the brake disc, so the heat dissipation efficiency of the brake disc is higher; the smaller the rainfall, the smaller the water flow outside the brake disc, and the lower the heat dissipation efficiency of the brake disc. On this basis, when estimating the brake disc temperature, adding rainfall information as one of the reference factors can improve the estimation accuracy of the brake disc temperature.

[0045] It should also be noted that after obtaining rainfall information, the wetness of the road surface can also be evaluated based on the rainfall information, so as to more accurately predict the thermodynamic behavior and braking performance of the brake disc under wet conditions. For example, rain can reduce the friction coefficient between the brake disc and the road surface, affecting the braking efficiency. In addition, by monitoring the rainfall in real time, the braking system can also dynamically adjust the braking strategy, such as increasing the braking pressure or intervening in braking in advance, to ensure sufficient braking force and stability under rainy conditions.

[0046] In an optional embodiment, when it is detected that the area where the vehicle is located is raining at the target moment, rainfall information in the area where the vehicle is located is determined by a rain sensor on the vehicle or a captured image of the vehicle's windshield under rainy days, including: when a rain sensor is provided on the vehicle, determining the rainfall information in the area where the vehicle is located by the rain sensor; when no rain sensor is provided on the vehicle, capturing an image of the vehicle's windshield under rainy days by an image acquisition device; determining rainfall information based on the image and a rainfall calculation model, wherein the training image of the rainfall calculation model is an image of the windshield taken under historical rainy days, and the training label of the rainfall calculation model is the actual rainfall on historical rainy days.

[0047] Alternatively, if Figure 2 As shown, when it is detected that the area where the vehicle is located is raining at the target time, the ECU can also determine whether a rain sensor is installed on the vehicle. If a rain sensor is installed on the vehicle, the rainfall information of the area where the vehicle is located can be determined through the rain sensor.

[0048] However, if the vehicle is not equipped with a rain sensor, an image acquisition device (such as a camera or a driving recorder installed in the vehicle) can be used to capture images of the vehicle's front windshield under rainy weather. Then, the ECU determines the rainfall information at the current target moment based on the image and the rainfall calculation model.

[0049] Optionally, the collected images can be analyzed using a pre-trained rainfall calculation model. The historical data used by the rainfall calculation model includes front windshield images taken under different rainfall conditions and their corresponding actual rainfall data. The current rainfall information is determined by matching the image with the rainfall calculation model.

[0050] Furthermore, rainfall information includes but is not limited to rainfall intensity, rainfall amount and other information. The rainfall information can be displayed on the vehicle dashboard or sent to the driver through the vehicle information system. After obtaining the rainfall information, it can also be used to automatically adjust the wiper speed to ensure the driver's clear vision; it can also be used in intelligent driving assistance systems, such as automatically adjusting the vehicle's driving speed and braking force to adapt to different rainfall conditions.

[0051] From the above content, it can be seen that this application not only utilizes the existing sensor resources of the vehicle, but also makes up for the shortcomings of the sensor through image analysis technology, improves the accuracy and reliability of rainfall information acquisition, and is suitable for various vehicles, especially vehicles with lower sensor configuration, and can also achieve accurate prediction of brake disc temperature.

[0052] In an optional embodiment, before determining the temperature of the vehicle's brake disc at a target moment based on the brake disc temperature of the vehicle at a first moment, environmental information, vehicle speed information, and brake disc pressure information, the method for determining the vehicle's brake disc temperature also includes: detecting whether the target moment is the power-on start moment of the vehicle's electronic control unit, and when it is detected that the target moment is not the power-on start moment of the electronic control unit, taking a historical moment that is separated from the target moment by a preset time length as the first moment, wherein the code in the electronic control unit is executed once every preset time length.

[0053] Alternatively, if Figure 2 As shown, it is necessary to detect whether the target moment is the power-on start moment of the vehicle's ECU. In other words, it is necessary to determine whether the code in the ECU is running for the first time at the target moment, that is, whether the ECU has just been powered on at the target moment. If not, obtain the code cycle period (that is, the preset duration mentioned above), and then determine the first moment according to the target moment and the preset duration, and obtain the brake disc temperature estimated at the first moment.

[0054] For example, assuming that the target time is recorded as T1 and the code cycle period is recorded as t, when the target time is not the power-on start time of the ECU, the first time T2 = T1 - t is calculated.

[0055] like Figure 2 As shown, when the target time is not the power-on start time of the ECU, the code cycle period is used as the time interval of code execution, and the brake disc temperature estimated at the previous time (ie, the first time) is used as the brake disc temperature at the previous time.

[0056] It should be noted that the above solution can ensure that the prediction of the brake disc temperature is based on the most recent driving status and environmental conditions during vehicle driving, thereby improving the real-time and accuracy of the prediction. It is suitable for various driving scenarios, especially in urban traffic and long-distance driving, and can timely warn of the risk of brake disc overheating.

[0057] In an optional embodiment, before determining the temperature of the vehicle's brake disc at a target moment based on the brake disc temperature of the vehicle at a first moment, environmental information, vehicle speed information, and brake disc pressure information, the method for determining the vehicle's brake disc temperature also includes: when it is detected that the target moment is the power-on start moment of the electronic control unit, obtaining the moment when the electronic control unit last stopped running the code; and taking the moment when the electronic control unit last stopped running the code as the first moment.

[0058] Alternatively, if Figure 2 As shown, it is necessary to determine whether the code in the ECU is running for the first time at the target time, that is, whether the ECU has just been powered on at the target time. If so, obtain the time when the electronic control unit last stopped running the code (that is, Figure 2 Then, according to the target time and the ECU memory reading power-off time, the first time is calculated to obtain the brake disc temperature estimated at the first time.

[0059] For example, assuming that the target time is recorded as T1, and the time when the ECU last stopped running the code is T3, when the target time is the power-on start time of the ECU, the first time is determined to be T3.

[0060] In addition, if Figure 2 As shown in the figure, the time interval between the target time and the ECU memory reading power-off time can be used as the total ECU shutdown time, and this ECU shutdown time is used as the code running time interval. In addition, the brake disc temperature (corresponding to Figure 2 The ECU memory reads the brake disc temperature) as the brake disc temperature at the first moment (corresponding to Figure 2 The brake disc temperature at the previous moment in time).

[0061] From the above content, it can be seen that the present application takes into account the initial temperature state of the brake disc when the vehicle is started, which is of great significance for predicting the brake disc temperature in the initial stage of vehicle startup, especially in the scenario where the vehicle is restarted after being parked for a long time. Through the technical solution of the present application, the temperature of the brake disc can be accurately predicted to avoid misjudgment of braking performance due to errors in initial temperature prediction.

[0062] In an optional embodiment, the temperature of the vehicle's brake disc at a target moment is determined based on the brake disc temperature of the vehicle at a first moment, environmental information, vehicle speed information, and brake disc pressure information. The method for determining the temperature of the vehicle's brake disc also includes: calculating the interval duration between the first moment and the target moment, and then determining the temperature of the vehicle's brake disc at the target moment based on the brake disc temperature of the vehicle at the first moment, environmental information, vehicle speed information, brake disc pressure information, and the interval duration.

[0063] Alternatively, if Figure 2 As shown, the interval between the first moment and the target moment is Figure 2 The code running time interval in the present application takes into account the influence of time factors on the brake disc temperature, and therefore the interval duration between the first moment and the target moment is also input into the brake disc temperature estimation model, and is used as a reference factor in the estimation process of the brake disc temperature, thereby being able to more accurately predict the change of the brake disc temperature over time, and is suitable for various driving conditions, especially in scenarios where the vehicle brakes frequently or drives for a long time, and can adjust the prediction of the brake disc temperature in real time to improve the accuracy of the prediction.

[0064] In an optional embodiment, the temperature of the brake disc of the vehicle at the target moment is determined according to the brake disc temperature, environmental information, vehicle speed information, brake disc pressure information and interval time of the brake disc at the first moment, including: firstly, the brake disc temperature, environmental information, vehicle speed information, brake disc pressure information and interval time of the brake disc at the first moment are converted into a feature vector. Then, the feature vector is input into the target model, and the temperature of the brake disc at the target moment is determined according to the feature vector through the prior knowledge learned by the target model in the model training stage, wherein the training data of the target model includes the brake disc temperature, environmental information, vehicle speed information, brake disc pressure information at the historical moment, and the interval time between the historical moment and the second moment, and the training label of the target model is the brake disc temperature at the second moment, wherein the second moment is after the historical moment.

[0065] Alternatively, if Figure 2 As shown, the brake disc temperature estimation model is the target model mentioned above, and the input information of the brake disc temperature estimation model includes: rainfall information at the target moment, vehicle speed information, wheel speed information, brake pressure information, ambient temperature information, wind speed information, humidity information, weather information, code running time interval, and the brake disc temperature at the previous moment (i.e., the brake disc temperature at the first moment).

[0066] It should be noted that the present application utilizes machine learning technology to convert the input information of the model into a feature vector, and then determines the temperature of the brake disc at the target time based on the feature vector based on the prior knowledge learned by the brake disc temperature estimation model during the model training phase. This method can learn the changing pattern of the brake disc temperature based on historical data and predict future temperature conditions. It not only improves the accuracy of the prediction, but also can adapt to different driving environments and vehicle conditions. It is suitable for the fields of intelligent driving and vehicle maintenance, and provides data support for the optimization and fault prediction of the braking system.

[0067] In an optional embodiment, after determining the temperature of the vehicle's brake disc at a target moment based on the brake disc temperature of the vehicle at a first moment, environmental information, vehicle speed information and brake disc pressure information, the method for determining the vehicle's brake disc temperature also includes: detecting whether the vehicle's electronic control unit stops running the code, and when it is detected that the electronic control unit has not stopped running the code, re-determining the latest temperature of the brake disc each time the code is executed; when it is detected that the vehicle's electronic control unit stops running the code at any moment, recording the moment when the code stops running, and recording the temperature of the brake disc at the moment when the code stops running.

[0068] Alternatively, if Figure 2 As shown, after the current brake disc temperature (e.g., the brake disc temperature at the target time) is determined by the brake disc temperature estimation model, it is possible to detect whether the ECU stops running the code, that is, to detect whether the ECU will be powered off. If it is detected that the ECU is powered off at a certain moment, the moment is stored in the memory for record, and the brake disc temperature at that moment is also stored in the memory for record. If the ECU is not detected to be powered off, the latest brake disc temperature is re-determined in real time after each execution of the code by the ECU.

[0069] Through the above process, the changes in brake disc temperature can be monitored in real time. Even if the electronic control unit temporarily stops running due to a fault or maintenance, the temperature status of the brake disc can be recorded, providing important data for subsequent fault analysis and system recovery. It is suitable for brake system monitoring of various vehicles, especially in vehicle maintenance and fault diagnosis. It can provide historical data on brake disc temperature to help technicians accurately judge the health status of the brake system.

[0070] From the above content, it can be seen that the present application comprehensively considers the factors affecting the brake disc temperature according to the current environmental conditions, such as wind speed, ambient humidity, ambient temperature and weather information, combined with the vehicle speed information (such as the vehicle's driving speed and the wheel speed) and the brake disc pressure information, so as to more accurately fit the brake disc temperature change model, and then obtain a more accurate brake disc temperature, thereby solving the technical problem in the prior art of estimating the brake disc temperature based on the heating and convection, heat conduction, thermal radiation and other factors generated by the friction caused by the braking force, and the large error in the brake disc temperature estimation due to insufficient consideration of the factors.

[0071] According to another aspect of the present application, a device for determining the temperature of a vehicle brake disc is also provided. Figure 3 is a schematic diagram of an optional device for determining the temperature of a vehicle brake disc according to an embodiment of the present application, such as Figure 3 As shown, it includes: a collecting unit 301 and a determining unit 302.

[0072] The collecting unit 301 is used to collect environmental information of the area where the vehicle is located, the speed information of the vehicle and the pressure information of the brake disc at a target time during the driving of the vehicle, wherein the environmental information at least includes temperature information, humidity information, wind speed information and weather information; the determining unit 302 is used to determine the temperature of the brake disc of the vehicle at a target time based on the brake disc temperature of the brake disc of the vehicle at a first time, the environmental information, the speed information of the vehicle and the pressure information of the brake disc, wherein the first time is before the target time.

[0073] Optionally, the collection unit 301 includes: a first determination subunit and a second determination subunit. The first determination subunit is used to determine the rainfall information of the area where the vehicle is located through a rainfall sensor on the vehicle or a collected image of the front windshield of the vehicle under rainy weather when it is detected that the area where the vehicle is located is rainy at the target time; the second determination subunit is used to use the rainfall information as weather information in the environmental information.

[0074] Optionally, the first determination subunit includes: a first determination module and a second determination module, wherein the first determination module is used to determine the rainfall information of the area where the vehicle is located through the rain sensor when a rain sensor is provided on the vehicle; the second determination module is used to capture an image of the front windshield of the vehicle under rainy days through an image acquisition device when no rain sensor is provided on the vehicle; the rainfall information is determined according to the image and a rainfall calculation model, wherein the training image of the rainfall calculation model is an image of the front windshield taken under historical rainy days, and the training label of the rainfall calculation model is the actual rainfall on historical rainy days.

[0075] Optionally, the device for determining the temperature of the vehicle brake disc further includes: a detection unit and a first processing unit. The detection unit is used to detect whether the target moment is the power-on start moment of the electronic control unit of the vehicle; the first processing unit is used to, when it is detected that the target moment is not the power-on start moment of the electronic control unit, use a historical moment with a preset time interval from the target moment as the first moment, wherein the code in the electronic control unit is executed once every preset time interval.

[0076] Optionally, the device for determining the temperature of a vehicle brake disc further includes: an acquisition unit and a second processing unit. The acquisition unit is used to acquire the time when the electronic control unit last stopped running the code when it is detected that the target time is the power-on start time of the electronic control unit; and the second processing unit is used to use the time when the electronic control unit last stopped running the code as the first time.

[0077] Optionally, the determination unit 302 includes: a calculation subunit and a third determination subunit. The calculation subunit is used to calculate the interval between the first moment and the target moment; the third determination subunit is used to determine the temperature of the brake disc of the vehicle at the target moment according to the brake disc temperature of the brake disc at the first moment, environmental information, vehicle speed information, brake disc pressure information and the interval.

[0078] Optionally, the third determination subunit includes: a vector conversion module and a temperature prediction module. The vector conversion module is used to convert the brake disc temperature, environmental information, vehicle speed information, brake disc pressure information and interval time of the brake disc at the first moment into a feature vector; the temperature prediction module is used to input the feature vector into the target model, and determine the temperature of the brake disc at the target moment according to the feature vector through the prior knowledge learned by the target model in the model training stage, wherein the training data of the target model includes the brake disc temperature, environmental information, vehicle speed information, brake disc pressure information at the historical moment, and the interval time between the historical moment and the second moment, and the training label of the target model is the brake disc temperature at the second moment, wherein the second moment is after the historical moment.

[0079] Optionally, the device for determining the temperature of the vehicle brake disc further includes: a third processing unit, a fourth processing unit, and a fifth processing unit. The third processing unit is used to detect whether the electronic control unit of the vehicle stops running the code; the fourth processing unit is used to re-determine the latest temperature of the brake disc each time the code is executed when it is detected that the electronic control unit has not stopped running the code; the fifth processing unit is used to record the time when the code stops running and the temperature of the brake disc at the time when the code stops running when it is detected that the electronic control unit of the vehicle stops running the code at any time.

[0080] According to another aspect of the present application, an electronic device is also provided, wherein the electronic device includes one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors execute the above-mentioned method for determining the vehicle brake disc temperature.

[0081] The above-mentioned embodiments or examples disclosed in the present application are not exhaustive, but are only illustrative of some embodiments or examples, and are not intended to be specific limitations on the scope of protection disclosed in the present application. In the absence of contradiction, each step in a certain embodiment or example in the present application can be implemented as an independent example, and the steps can be combined arbitrarily. For example, the scheme after removing some steps in a certain embodiment or example can also be implemented as an independent example, and the order of the steps in a certain embodiment or example can be arbitrarily exchanged. In addition, the optional methods or optional examples in a certain embodiment or example can be combined arbitrarily; in addition, the various embodiments or examples can be combined arbitrarily, for example, some or all steps of different embodiments or examples can be combined arbitrarily, and a certain embodiment or example can be combined arbitrarily with the optional methods or optional examples of other embodiments or examples.

[0082] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0083] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0084] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0085] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0086] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0087] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0088] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for determining the temperature of a vehicle brake disc, characterized in that: include: During the driving of the vehicle, environmental information of the area where the vehicle is located, speed information of the vehicle, and pressure information of the brake disc are collected at the target time, wherein the environmental information includes at least temperature information, humidity information, wind speed information, and weather information; The temperature of the brake disc of the vehicle at the target moment is determined based on the brake disc temperature of the brake disc of the vehicle at a first moment, the environmental information, the speed information of the vehicle, and the pressure information of the brake disc, wherein the first moment is before the target moment.

2. The method for determining the temperature of a vehicle brake disc according to claim 1, characterized in that: During the driving process of the vehicle, environmental information of the area where the vehicle is located at the target time is collected, including: When it is detected that the area where the vehicle is located is rainy at the target time, determining rainfall information of the area where the vehicle is located through a rain sensor on the vehicle or an image of the front windshield of the vehicle collected under the rainy day; The rainfall information is used as weather information in the environmental information.

3. The method for determining the temperature of a vehicle brake disc according to claim 2, characterized in that: When it is detected that the area where the vehicle is located is rainy at the target time, determining rainfall information of the area where the vehicle is located by using a rain sensor on the vehicle or a collected image of the front windshield of the vehicle under the rainy day, including: In the case where the rain sensor is provided on the vehicle, determining the rainfall information of the area where the vehicle is located by means of the rain sensor; In the case where the rain sensor is not provided on the vehicle, an image of the front windshield of the vehicle under the rainy day is collected by an image acquisition device; the rainfall information is determined according to the image and a rainfall calculation model, wherein the training image of the rainfall calculation model is an image of the front windshield taken under historical rainy days, and the training label of the rainfall calculation model is the actual rainfall on the historical rainy day.

4. The method for determining the temperature of a vehicle brake disc according to claim 1, characterized in that: Before determining the temperature of the brake disc of the vehicle at the target time according to the brake disc temperature of the brake disc of the vehicle at the first time, the environmental information, the speed information of the vehicle, and the pressure information of the brake disc, the method for determining the temperature of the brake disc of the vehicle further includes: Detecting whether the target time is a power-on start time of an electronic control unit of the vehicle; When it is detected that the target moment is not the power-on startup moment of the electronic control unit, a historical moment separated from the target moment by a preset time length is used as the first moment, wherein the code in the electronic control unit is executed once every the preset time length.

5. The method for determining the temperature of a vehicle brake disc according to claim 4, characterized in that: Before determining the temperature of the brake disc of the vehicle at the target time according to the brake disc temperature of the brake disc of the vehicle at the first time, the environmental information, the speed information of the vehicle, and the pressure information of the brake disc, the method for determining the temperature of the brake disc of the vehicle further includes: When it is detected that the target time is the power-on start time of the electronic control unit, obtaining the time when the electronic control unit last stopped running the code; The time when the electronic control unit stops running the code most recently is taken as the first time.

6. The method for determining the temperature of a vehicle brake disc according to claim 1, characterized in that: Determining the temperature of the brake disc of the vehicle at the target time according to the brake disc temperature of the brake disc of the vehicle at the first time, the environmental information, the speed information of the vehicle, and the pressure information of the brake disc, wherein the method for determining the temperature of the brake disc of the vehicle further includes: Calculating the interval between the first moment and the target moment; The temperature of the brake disc of the vehicle at the target moment is determined according to the brake disc temperature of the brake disc at the first moment, the environmental information, the speed information of the vehicle, the pressure information of the brake disc, and the interval duration.

7. The method for determining the temperature of a vehicle brake disc according to claim 6, characterized in that: Determining the temperature of the brake disc of the vehicle at the target time according to the brake disc temperature of the brake disc at the first time, the environmental information, the speed information of the vehicle, the pressure information of the brake disc, and the interval duration, includes: Converting the brake disc temperature of the brake disc at the first moment, the environmental information, the speed information of the vehicle, the pressure information of the brake disc, and the interval duration into a feature vector; The feature vector is input into the target model, and the temperature of the brake disc at the target moment is determined according to the feature vector through the prior knowledge learned by the target model in the model training phase, wherein the training data of the target model includes the brake disc temperature at the historical moment, environmental information, vehicle speed information, brake disc pressure information, and the interval between the historical moment and the second moment, and the training label of the target model is the brake disc temperature at the second moment, wherein the second moment is after the historical moment.

8. The method for determining the temperature of a vehicle brake disc according to claim 1, characterized in that: After determining the temperature of the brake disc of the vehicle at the target time according to the brake disc temperature of the brake disc of the vehicle at the first time, the environmental information, the speed information of the vehicle, and the pressure information of the brake disc, the method for determining the temperature of the brake disc of the vehicle further includes: detecting whether an electronic control unit of the vehicle stops running a code; When it is detected that the electronic control unit has not stopped running the code, each time the code is executed, the latest temperature of the brake disc is re-determined; When it is detected that the electronic control unit of the vehicle stops running the code at any time, the time when the code stops running is recorded, and the temperature of the brake disc at the time when the code stops running is recorded.

9. A device for determining the temperature of a vehicle brake disc, characterized in that: include: A collection unit, used to collect environmental information of the area where the vehicle is located, speed information of the vehicle and pressure information of the brake disc at a target time during the driving of the vehicle, wherein the environmental information includes at least temperature information, humidity information, wind speed information and weather information; A determination unit is used to determine the temperature of the brake disc of the vehicle at the target moment according to the brake disc temperature of the brake disc of the vehicle at a first moment, the environmental information, the speed information of the vehicle and the pressure information of the brake disc, wherein the first moment is before the target moment.

10. An electronic device, characterized in that: The invention comprises one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors execute the method for determining the vehicle brake disc temperature as described in any one of claims 1 to 8.

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