Method, device, equipment and storage medium for monitoring the service life limit of a vehicle brake disc

Abstract

The present application relates to a method, device, equipment and storage medium for monitoring the life limit of a vehicle brake disc, belonging to the technical field of automotive brake discs, including obtaining the real-time braking pressure characteristic value of a target brake disc; comparing the real-time braking pressure characteristic value with a braking pressure characteristic threshold; if the real-time braking pressure characteristic value is not less than the braking pressure characteristic threshold, determining that the target brake disc has reached the life limit. When monitoring the life limit of a vehicle brake disc, the present application determines whether the brake disc has reached the life limit according to the magnitude of the real-time braking pressure characteristic value of the brake disc: when the real-time braking pressure characteristic value is not less than the braking pressure characteristic threshold, it is determined that the target brake disc has reached the life limit. That is, the present application uses the braking pressure to characterize the performance state of the brake disc, which is directly related to the actual vehicle braking force, can more accurately reflect the actual performance state of the brake disc, and thus can achieve accurate monitoring of whether the brake disc has reached the life limit.

Description

Technical Field

[0001] The present application relates to the technical field of automotive brake discs, and particularly relates to a method, device, equipment and storage medium for monitoring the life limit of a vehicle brake disc. Background Art

[0002] The braking system is a very important system on a vehicle, which is related to the driving stability and safety factor of the vehicle. For the braking system, the vehicle brake disc and friction pads are crucial. Among them, since the braking of the vehicle is achieved by the friction generated by the contact between the friction pads and the brake disc, the brake disc and friction pads are vulnerable parts, that is, the service life of the brake disc and friction pads is limited. When the brake disc deteriorates to a certain extent, problems such as brake judder, braking force decline, and even brake disc cracking that affect the safe driving of the vehicle will occur. Therefore, real-time monitoring of whether the brake disc and friction pads reach the life limit is an important measure to ensure the safe driving of the vehicle.

[0003] However, in the related art, to determine whether the brake disc reaches the life limit, it is generally determined by measuring the wear amount of the brake disc thickness. Although this method can achieve the monitoring of the life limit of the brake disc to a certain extent, since the wear amount cannot truly represent the performance state of the brake disc, it is impossible to accurately judge whether the brake disc reaches the wear limit through the wear amount, that is, it is impossible to accurately monitor whether the brake disc reaches the life limit. Summary of the Invention

[0004] The present application provides a method, device, equipment and storage medium for monitoring the life limit of a vehicle brake disc to solve the problem in the related art that it is impossible to accurately monitor whether the brake disc reaches the life limit.

[0005] In a first aspect, a method for monitoring the life limit of a vehicle brake disc is provided, including the following steps:

[0006] Obtain the real-time braking pressure characteristic value of the target brake disc;

[0007] Compare the real-time braking pressure characteristic value with the braking pressure characteristic threshold;

[0008] If the real-time braking pressure characteristic value is not less than the braking pressure characteristic threshold, it is determined that the target brake disc reaches the life limit.

[0009] Based on the above technical solution, the obtaining of the real-time braking pressure characteristic value of the target brake disc includes:

[0010] Obtain the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value of the target brake disc based on a braking pressure sensor and a wheel speed sensor;

[0011] Perform a weighted processing on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value based on a preset weight value to obtain a real-time braking pressure characteristic value.

[0012] On the basis of the above technical solution, after the step of obtaining the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value of the target brake disc based on the braking pressure sensor and the wheel speed sensor, the method further includes:

[0013] Judge whether the real-time braking pressure fluctuation value is greater than a preset braking pressure fluctuation extreme value;

[0014] If the real-time braking pressure fluctuation value is greater than the preset braking pressure fluctuation extreme value, determine that the target brake disc has reached the end of its service life;

[0015] If the real-time braking pressure fluctuation value is not greater than the preset braking pressure fluctuation extreme value, perform the step of performing a weighted processing on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value based on a preset weight value to obtain a real-time braking pressure characteristic value.

[0016] On the basis of the above technical solution, after the step of obtaining the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value of the target brake disc based on the braking pressure sensor and the wheel speed sensor, the method further includes:

[0017] Judge whether the real-time braking pressure fluctuation slope value is greater than a preset braking pressure fluctuation slope extreme value;

[0018] If the real-time braking pressure fluctuation slope value is greater than the preset braking pressure fluctuation slope extreme value, determine that the target brake disc has reached the end of its service life;

[0019] If the real-time braking pressure fluctuation slope value is not greater than the preset braking pressure fluctuation slope extreme value, perform the step of performing a weighted processing on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value based on a preset weight value to obtain a real-time braking pressure characteristic value.

[0020] On the basis of the above technical solution, the real-time braking pressure fluctuation value is used to characterize the thickness difference of the target brake disc, and the real-time braking pressure fluctuation slope value is used to characterize the radial runout performance and roughness of the target brake disc.

[0021] On the basis of the above technical solution, before the step of obtaining the real-time braking pressure characteristic value of the target brake disc, the method further includes:

[0022] Perform a vehicle braking simulation on the brake disc that has reached the end of its service life to obtain a braking pressure fluctuation extreme value and a braking pressure fluctuation slope extreme value;

[0023] Weight the extreme value of the braking pressure fluctuation and the extreme value of the braking pressure fluctuation slope based on a preset weight value to obtain a braking pressure characteristic threshold.

[0024] Based on the above technical solution, after the step of determining that the target brake disc has reached the end of its life if the real-time braking pressure characteristic value is not less than the braking pressure characteristic threshold, the method further includes:

[0025] Send a prompt message for prompting that the target brake disc has reached the end of its life and needs to be replaced to the instrument panel for display.

[0026] In a second aspect, a vehicle brake disc life limit monitoring device is provided, including:

[0027] An acquisition unit configured to acquire a real-time braking pressure characteristic value of a target brake disc;

[0028] A monitoring unit configured to compare the real-time braking pressure characteristic value with a braking pressure characteristic threshold; if the real-time braking pressure characteristic value is not less than the braking pressure characteristic threshold, determine that the target brake disc has reached the end of its life.

[0029] Based on the above technical solution, the acquisition unit is specifically configured to:

[0030] Acquire a real-time braking pressure fluctuation value and a real-time braking pressure fluctuation slope value of the target brake disc based on a braking pressure sensor and a wheel speed sensor;

[0031] Perform a weighting process on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value based on a preset weight value to obtain a real-time braking pressure characteristic value.

[0032] Based on the above technical solution, the monitoring unit is further configured to:

[0033] Judge whether the real-time braking pressure fluctuation value is greater than a preset extreme value of the braking pressure fluctuation;

[0034] If the real-time braking pressure fluctuation value is greater than the preset extreme value of the braking pressure fluctuation, determine that the target brake disc has reached the end of its life;

[0035] If the real-time braking pressure fluctuation value is not greater than the preset extreme value of the braking pressure fluctuation, cause the acquisition unit to execute the step of performing a weighting process on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value based on a preset weight value to obtain a real-time braking pressure characteristic value.

[0036] Based on the above technical solution, the monitoring unit is further configured to:

[0037] Determine whether the real-time braking pressure fluctuation slope value is greater than a preset extreme value of the braking pressure fluctuation slope;

[0038] If the real-time braking pressure fluctuation slope value is greater than the preset extreme value of the braking pressure fluctuation slope, it is determined that the target brake disc has reached the end of its service life;

[0039] If the real-time braking pressure fluctuation slope value is not greater than the preset extreme value of the braking pressure fluctuation slope, the acquisition unit is made to execute the step of performing weighted processing on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value based on a preset weight value to obtain a real-time braking pressure characteristic value.

[0040] Based on the above technical solution, the real-time braking pressure fluctuation value is used to characterize the thickness difference of the target brake disc, and the real-time braking pressure fluctuation slope value is used to characterize the radial runout performance and roughness of the target brake disc.

[0041] Based on the above technical solution, the device further includes a simulation unit, which is used for:

[0042] Perform a vehicle braking simulation on the brake disc that has reached the end of its service life to obtain an extreme value of braking pressure fluctuation and an extreme value of braking pressure fluctuation slope;

[0043] Based on a preset weight value, perform weighting on the extreme value of braking pressure fluctuation and the extreme value of braking pressure fluctuation slope to obtain a braking pressure characteristic threshold.

[0044] Based on the above technical solution, the monitoring unit is further used for:

[0045] Send a prompt message for prompting that the target brake disc has reached the end of its service life and needs to be replaced to the instrument panel for display.

[0046] In a third aspect, a vehicle brake disc service life limit monitoring device is provided, including: a memory and a processor, where at least one instruction is stored in the memory, and the at least one instruction is loaded and executed by the processor to implement the foregoing vehicle brake disc service life limit monitoring method.

[0047] In a fourth aspect, a computer-readable storage medium is provided, where the computer storage medium stores a computer program, and when the computer program is executed by a processor, the foregoing vehicle brake disc service life limit monitoring method is implemented.

[0048] The beneficial effects brought by the technical solution provided in this application include: being able to accurately monitor whether the brake disc has reached the end of its service life.

[0049] The present application provides a method, device, equipment and storage medium for monitoring the life limit of a vehicle brake disc, including obtaining the real-time braking pressure characteristic value of a target brake disc; comparing the real-time braking pressure characteristic value with a braking pressure characteristic threshold; and if the real-time braking pressure characteristic value is not less than the braking pressure characteristic threshold, determining that the target brake disc reaches the life limit. When monitoring the life limit of a vehicle brake disc, the present application determines whether the brake disc reaches the life limit according to the magnitude of the real-time braking pressure characteristic value of the brake disc: when the real-time braking pressure characteristic value is not less than the braking pressure characteristic threshold, it is determined that the target brake disc reaches the life limit. That is, the present application characterizes the performance state of the brake disc through the braking pressure, which is directly related to the actual vehicle braking force, can more accurately reflect the actual performance state of the brake disc, and thus can achieve accurate monitoring of whether the brake disc reaches the life limit. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can obtain other drawings according to these drawings without creative efforts.

[0051] Figure 1 It is a schematic flowchart of a method for monitoring the life limit of a vehicle brake disc provided by an embodiment of the present application;

[0052] Figure 2 It is a schematic structural diagram of a device for monitoring the life limit of a vehicle brake disc provided by an embodiment of the present application;

[0053] Figure 3 It is a schematic structural diagram of a device for monitoring the life limit of a vehicle brake disc provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0054] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present application belong to the scope of protection of the present application.

[0055] The embodiments of the present application provide a method, device, equipment and storage medium for monitoring the life limit of a vehicle brake disc, which can solve the problem in the related art that it is impossible to accurately monitor whether the brake disc reaches the life limit.

[0056] To solve the above technical problems, the general idea of the present application is as follows:

[0057] A method for monitoring the life limit of a vehicle brake disc, the method comprising the following steps:

[0058] Step S10: Obtain the real-time braking pressure characteristic value of the target brake disc;

[0059] Step S20: Compare the real-time braking pressure characteristic value with the braking pressure characteristic threshold;

[0060] Step S30: If the real-time braking pressure characteristic value is not less than the braking pressure characteristic threshold, determine that the target brake disc has reached the life limit.

[0061] The following further elaborates on the embodiments of the present application in conjunction with the accompanying drawings.

[0062] See Figure 1 As shown, the embodiments of the present application provide a method for monitoring the life limit of a vehicle brake disc, the method comprising the following steps:

[0063] Step S10: Obtain the real-time braking pressure characteristic value of the target brake disc;

[0064] Further, the obtaining of the real-time braking pressure characteristic value of the target brake disc includes:

[0065] Based on a braking pressure sensor and a wheel speed sensor, obtain the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value of the target brake disc; wherein, the real-time braking pressure fluctuation value is used to characterize the thickness difference of the target brake disc, and the real-time braking pressure fluctuation slope value is used to characterize the radial runout performance and roughness of the target brake disc;

[0066] Perform weighted processing on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value based on a preset weight value to obtain the real-time braking pressure characteristic value.

[0067] Exemplarily, when the brake disc is used for a period of time, its performance indicators will decline. Among them, the typical 3 kinds of declines are: the radial runout becomes larger, the thickness difference becomes larger, and the roughness becomes larger, and the above 3 kinds of declines can be reflected by the pressure fluctuation of the braking hydraulic pressure within one revolution of the brake disc, that is, when the radial runout becomes larger, the thickness difference becomes larger, and the roughness becomes larger, the pressure fluctuation of the braking hydraulic pressure within one revolution of the brake disc will also become larger; and when the brake disc declines to a certain extent, situations affecting vehicle safety such as brake judder, braking force decline, and even brake disc cracking will occur. Therefore, in this embodiment, by obtaining the real-time braking pressure of the brake disc to characterize the performance state of the brake disc, it is directly related to the actual vehicle braking force and can more accurately reflect the actual performance state of the brake disc.

[0068] Among them, the thickness difference of the brake disc is mainly reflected in the braking pressure fluctuation value of the brake disc, while the radial runout performance and roughness of the brake disc are mainly reflected in the braking pressure fluctuation slope value of the brake. Therefore, in this embodiment, the braking pressure fluctuation value and the braking pressure fluctuation slope value can be obtained and these two characteristics can be combined to judge the life limit of the brake disc.

[0069] Specifically, the pressure signal of the braking pressure sensor integrated in the ESC (Electronic Stability Controller, body electronic stability control system) can be monitored in real time, and combined with the wheel speed pulse signal of the wheel speed sensor, and then the braking pipeline pressure change of the target brake disc rotating one week can be decomposed, so as to obtain the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value. Among them, the wheel speed sensor is installed on the wheel side and rotates with the wheel. Assuming that the toothed ring has 48 teeth, then the wheel speed sensor will emit 48 wheel speed pulses when the wheel rotates one week. Then, by every 48 wheel speed pulses, it can be determined that the wheel rotates one week, that is, the brake disc rotates one week.

[0070] Since the thickness difference of the brake disc has a greater impact on the life of the brake disc than the radial runout performance and roughness, weight values can be set in advance for the braking pressure fluctuation value and the braking pressure fluctuation slope value, and the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value are weighted according to the weight values, so as to obtain the real-time braking pressure characteristic value of the target brake disc. For example, the weight value of the braking pressure fluctuation value can be set to 80%, and the weight value of the braking pressure fluctuation slope value is 20%. Therefore, the real-time braking pressure characteristic value = real-time braking pressure fluctuation value × 80% + real-time braking pressure fluctuation slope value × 20%. It should be noted that the weight value can be determined according to the materials of the brake disc and the friction plate and corrected through actual test data. Of course, it can also be set according to actual needs and is not limited here.

[0071] Step S20: Compare the real-time braking pressure characteristic value with the braking pressure characteristic threshold;

[0072] Furthermore, before the step of obtaining the real-time braking pressure characteristic value of the target brake disc, it further includes:

[0073] Perform a vehicle braking simulation on the brake disc that has reached the life limit to obtain the extreme value of the braking pressure fluctuation and the extreme value of the braking pressure fluctuation slope;

[0074] Based on the preset weight value, weight the extreme value of the braking pressure fluctuation and the extreme value of the braking pressure fluctuation slope to obtain the braking pressure characteristic threshold.

[0075] Exemplarily, in this embodiment, it is also necessary to set the braking pressure characteristic threshold: On the brake disc test bench, use a brake disc that has reached the service life limit to simulate the braking pressure change under vehicle conditions, and extract typical characteristics (i.e., the extreme value of braking pressure fluctuation and the extreme value of the slope of braking pressure fluctuation). Among them, the extreme value of braking pressure fluctuation refers to the pressure peak-valley corresponding to one rotation of the brake disc, that is, the maximum pressure difference, which can be understood as the maximum value - the minimum value of the brake disc thickness + radial runout + roughness. This value reflects the extreme value difference of the characteristic parameters within one week of the brake disc; and the extreme value of the slope of braking pressure fluctuation can be understood as the change rate of the brake disc thickness + radial runout + roughness. This value reflects the change rate of the brake disc characteristic parameters. The wear condition of the brake disc can be comprehensively evaluated by combining these two characteristics.

[0076] In this embodiment, weight values can also be set in advance for the extreme value of braking pressure fluctuation and the extreme value of the slope of braking pressure fluctuation, and weighted processing is performed on the extreme value of braking pressure fluctuation and the extreme value of the slope of braking pressure fluctuation according to this weight value, then the braking pressure characteristic threshold can be obtained. For example, the weight value of the extreme value of braking pressure fluctuation can be set to 80%, and the weight value of the extreme value of the slope of braking pressure fluctuation is 20%. Therefore, the braking pressure characteristic threshold = the real-time extreme value of braking pressure fluctuation × 80% + the extreme value of the slope of braking pressure fluctuation × 20%. It should be noted that this weight value needs to be consistent with the weight values of the braking pressure fluctuation value and the slope value of braking pressure fluctuation.

[0077] Therefore, in this embodiment, it can be accurately determined whether the target brake disc has reached the service life limit by whether the real-time braking pressure characteristic value is less than the braking pressure characteristic threshold. It should be noted that it is also possible not to set weights for the braking pressure fluctuation value, the slope value of braking pressure fluctuation, the extreme value of braking pressure fluctuation, and the extreme value of the slope of braking pressure fluctuation, but directly compare the real-time braking pressure fluctuation value with the extreme value of braking pressure fluctuation and compare the real-time slope value of braking pressure fluctuation with the extreme value of the slope of braking pressure fluctuation, and directly determine whether the target brake disc has reached the service life limit based on the comparison results. At this time, the real-time braking pressure characteristic value includes the braking pressure fluctuation value and the slope value of braking pressure fluctuation, and the braking pressure characteristic threshold includes the extreme value of braking pressure fluctuation and the extreme value of the slope of braking pressure fluctuation.

[0078] Step S30: If the real-time braking pressure characteristic value is not less than the braking pressure characteristic threshold, it is determined that the target brake disc has reached the service life limit.

[0079] Exemplarily, in this embodiment, when the real-time braking pressure characteristic value is less than the braking pressure characteristic threshold, it indicates that the actual performance of the target brake disc has not reached the state of being unusable, that is, it has not reached the service limit and can continue to be used. Then it is determined that the target brake disc has not reached the end of its life. If the real-time braking pressure characteristic value is greater than or equal to the braking pressure characteristic threshold, it indicates that the degree of deterioration of the target brake disc caused by the increase in radial runout, thickness difference, and roughness will have an adverse impact on the safe driving of the vehicle (such as severe braking judder, severe braking force decline, brake disc cracking, etc.). That is, the actual performance of the target brake disc has reached the service limit and cannot continue to be used. Then it is determined that the target brake disc has reached the end of its life and needs to be replaced.

[0080] Further, after the step of obtaining the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value of the target brake disc based on the braking pressure sensor and the wheel speed sensor, the following steps are further included:

[0081] Determine whether the real-time braking pressure fluctuation value is greater than a preset extreme value of braking pressure fluctuation;

[0082] If the real-time braking pressure fluctuation value is greater than the preset extreme value of braking pressure fluctuation, it is determined that the target brake disc has reached the end of its life;

[0083] If the real-time braking pressure fluctuation value is not greater than the preset extreme value of braking pressure fluctuation, perform the step of obtaining the real-time braking pressure characteristic value by performing weighted processing on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value based on the preset weight value.

[0084] Exemplarily, in this embodiment, before performing weighted processing on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value based on a preset weight value, an upper limit value (i.e., the extreme value of the braking pressure fluctuation) of the braking pressure fluctuation value can also be set to prevent the occurrence of abnormal usage conditions. Therefore, it can be first determined whether the real-time braking pressure fluctuation value is greater than the preset extreme value of the braking pressure fluctuation. If not, the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value can be weighted processed to obtain the real-time braking pressure characteristic value, and it can be determined whether the target brake disc has reached the service life limit according to the real-time braking pressure characteristic value and the braking pressure characteristic threshold; if so, it means that the thickness difference of the target brake disc is too large, that is, the degradation degree of the target brake disc has been so large that it will have an adverse impact on the safe driving of the vehicle. Then, the actual performance of the target brake disc has reached the usage limit and cannot be used continuously. Therefore, it can be determined that the target brake disc has reached the service life limit, and at this time, the brake disc needs to be replaced. For example, if there is a large pit on the target brake disc, the real-time braking pressure fluctuation value of the target brake disc will be a relatively large value at this time, and then exceed the upper limit value (i.e., the extreme value of the braking pressure fluctuation, and the extreme value of the braking pressure fluctuation can be initially set to 4 mm) allowed by the real-time braking pressure fluctuation value. At this time, it is necessary to determine that the target brake disc has reached the service life limit.

[0085] Further, after the step of obtaining the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value of the target brake disc based on the braking pressure sensor and the wheel speed sensor, it further includes:

[0086] Determine whether the real-time braking pressure fluctuation slope value is greater than a preset extreme value of the braking pressure fluctuation slope;

[0087] If the real-time braking pressure fluctuation slope value is greater than the preset extreme value of the braking pressure fluctuation slope, determine that the target brake disc has reached the service life limit;

[0088] If the real-time braking pressure fluctuation slope value is not greater than the preset extreme value of the braking pressure fluctuation slope, perform the step of performing weighted processing on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value based on a preset weight value to obtain the real-time braking pressure characteristic value.

[0089] Exemplarily, in this embodiment, before performing weighted processing on the real-time brake pressure fluctuation value and the real-time brake pressure fluctuation slope value based on a preset weight value, an upper limit value of the brake pressure fluctuation slope value (i.e., the extreme value of the brake pressure fluctuation slope) can also be set to prevent the occurrence of abnormal usage conditions. Therefore, it can be first determined whether the real-time brake pressure fluctuation slope value is greater than the preset extreme value of the brake pressure fluctuation slope. If not, the real-time brake pressure fluctuation value and the real-time brake pressure fluctuation slope value can be weighted processed to obtain the real-time brake pressure characteristic value, and based on the real-time brake pressure characteristic value and the brake pressure characteristic threshold, it can be determined whether the target brake disc has reached the service life limit; if so, it indicates that the radial runout and / or roughness of the target brake disc are too large, that is, the deterioration degree of the target brake disc has become so large that it will have an adverse impact on the safe driving of the vehicle. Then, the actual performance of the target brake disc has reached the usage limit and cannot be used continuously. Therefore, it can be determined that the target brake disc has reached the service life limit, and at this time, the brake disc needs to be replaced.

[0090] For example, when the radial runout and roughness of the target brake disc are very large, the brake pressure fluctuation slope value of the target brake disc will also be quite high. When it exceeds the set upper limit value (i.e., the extreme value of the brake pressure fluctuation slope), it is also necessary to determine that the target brake disc has reached the service life limit.

[0091] Further, after the step of determining that the target brake disc has reached the service life limit if the real-time brake pressure characteristic value is not less than the brake pressure characteristic threshold, it further includes:

[0092] Sending a prompt message for prompting that the target brake disc has reached the service life limit and needs to be replaced to the instrument panel for display.

[0093] Exemplarily, due to customer negligence, there is often a situation where the brake disc is not replaced even though it is severely worn, resulting in potential safety hazards. In this embodiment, by real-time monitoring the wear condition and performance state of the target brake disc, when the target brake disc is approaching the wear limit (i.e., the performance deteriorates to the service life limit), the driver can be reminded that the brake disc has reached the wear limit and needs to be replaced through means such as instrument text or a malfunction indicator light; for example, the text reminder content "The brake disc has reached the wear limit, please replace the brake disc as soon as possible" is displayed on the instrument panel, thereby greatly improving the braking safety of the vehicle.

[0094] In summary, this embodiment proposes a method for monitoring the life limit of a brake disc to solve the vehicle driving safety problem caused by the current situation of judging whether the brake disc reaches the wear limit based on the experience of the wear amount or completely ignoring whether the brake disc has reached the life limit. Specifically, when monitoring the life limit of the vehicle brake disc, this embodiment determines whether the brake disc reaches the life limit according to the magnitude of the real-time braking pressure characteristic value of the brake disc: when the real-time braking pressure characteristic value is not less than the braking pressure characteristic threshold, it is determined that the target brake disc reaches the life limit. That is, this embodiment uses the braking pressure to characterize the performance state of the brake disc, which is directly related to the actual vehicle braking force and can more accurately reflect the actual performance state of the brake disc, thereby enabling accurate monitoring of whether the brake disc reaches the life limit. In addition, this embodiment uses the existing sensor information of the vehicle to achieve accurate monitoring of the life limit of the brake disc, that is, without increasing the cost of vehicle parts, the life limit of the brake disc can be monitored only through a software model.

[0095] It should be noted that the step numbers of each step in the embodiments of this application do not limit the order of operations in the technical solutions of this application.

[0096] See Figure 2 As shown, based on the same inventive concept as the method embodiment, this application embodiment provides a device for monitoring the life limit of a vehicle brake disc, including:

[0097] An acquisition unit, which is used to acquire the real-time braking pressure characteristic value of the target brake disc;

[0098] A monitoring unit, which is used to compare the real-time braking pressure characteristic value with the braking pressure characteristic threshold; if the real-time braking pressure characteristic value is not less than the braking pressure characteristic threshold, it is determined that the target brake disc reaches the life limit.

[0099] Further, the acquisition unit is specifically used for:

[0100] Based on the braking pressure sensor and the wheel speed sensor, acquire the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value of the target brake disc;

[0101] Based on the preset weight value, perform weighted processing on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value to obtain the real-time braking pressure characteristic value.

[0102] Further, the monitoring unit is also used for:

[0103] Judge whether the real-time braking pressure fluctuation value is greater than the preset extreme value of the braking pressure fluctuation;

[0104] If the real-time braking pressure fluctuation value is greater than the preset extreme value of the braking pressure fluctuation, it is determined that the target brake disc reaches the life limit;

[0105] If the real-time brake pressure fluctuation value is not greater than a preset extreme value of brake pressure fluctuation, the acquisition unit is made to execute the step of performing weighted processing on the real-time brake pressure fluctuation value and the real-time brake pressure fluctuation slope value based on a preset weight value to obtain a real-time brake pressure characteristic value.

[0106] Furthermore, the monitoring unit is further configured to:

[0107] Determine whether the real-time brake pressure fluctuation slope value is greater than a preset extreme value of brake pressure fluctuation slope;

[0108] If the real-time brake pressure fluctuation slope value is greater than a preset extreme value of brake pressure fluctuation slope, it is determined that the target brake disc has reached the end of its service life;

[0109] If the real-time brake pressure fluctuation slope value is not greater than a preset extreme value of brake pressure fluctuation slope, the acquisition unit is made to execute the step of performing weighted processing on the real-time brake pressure fluctuation value and the real-time brake pressure fluctuation slope value based on a preset weight value to obtain a real-time brake pressure characteristic value.

[0110] Furthermore, the real-time brake pressure fluctuation value is used to characterize the thickness difference of the target brake disc, and the real-time brake pressure fluctuation slope value is used to characterize the radial runout performance and roughness of the target brake disc.

[0111] Furthermore, the device further includes a simulation unit, which is configured to:

[0112] Perform a vehicle braking simulation on a brake disc that has reached the end of its service life to obtain an extreme value of brake pressure fluctuation and an extreme value of brake pressure fluctuation slope;

[0113] Perform weighting on the extreme value of brake pressure fluctuation and the extreme value of brake pressure fluctuation slope based on a preset weight value to obtain a brake pressure characteristic threshold.

[0114] Furthermore, the monitoring unit is further configured to:

[0115] Send a prompt message for prompting that the target brake disc has reached the end of its service life and needs to be replaced to the instrument panel for display.

[0116] It should be noted that those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described device and each unit can refer to the corresponding processes in the foregoing embodiments of the vehicle brake disc service life limit monitoring method, and will not be elaborated herein.

[0117] The vehicle brake disc service life limit monitoring device provided in the above embodiment can be implemented in the form of a computer program, and this computer program can be on such as Figure 3Run on the vehicle brake disc life limit monitoring device shown.

[0118] An embodiment of the present application also provides a vehicle brake disc life limit monitoring device, including: a memory, a processor, and a network interface connected through a system bus. At least one instruction is stored in the memory, and the at least one instruction is loaded and executed by the processor to implement all or part of the steps of the aforementioned vehicle brake disc life limit monitoring method.

[0119] Among them, the network interface is used for network communication, such as sending assigned tasks, etc. Those skilled in the art can understand that Figure 3 The structures shown are only block diagrams of some structures related to the solution of the present application, and do not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0120] The processor can be a CPU, or other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor, or the processor can also be any conventional processor, etc. The processor is the control center of the computer device, and connects various parts of the entire computer device through various interfaces and lines.

[0121] The memory can be used to store computer programs and / or modules. The processor realizes various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. The memory mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for at least one function (such as video playback function, image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as video data, image data, etc.), etc. In addition, the memory can include high-speed random access memory, and can also include non-volatile memory, such as hard disks, memory, plug-in hard disks, smart media cards (SMCs), secure digital (SD) cards, flash cards, at least one magnetic disk storage device, flash device, or other volatile solid-state storage devices.

[0122] An embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, all or part of the steps of the foregoing vehicle brake disc life limit monitoring method are implemented.

[0123] To implement all or part of the foregoing processes, the embodiments of the present application may also be completed by instructing relevant hardware through a computer program. The computer program may be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the foregoing various methods may be implemented. Among them, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file, or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0124] Those skilled in the art should understand that the embodiments of the present application may be provided as a method, system, server, or computer program product. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program code.

[0125] It should be noted that in this article, the term "including", "comprising", or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article, or system. Without more limitations, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article, or system including that element.

[0126] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems) and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of flows and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate a means for realizing the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or a means for realizing the functions specified in multiple blocks.

[0127] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for monitoring the life limit of a vehicle brake disc, characterized in that, Including the following steps: Obtain the real-time braking pressure characteristic value of the target brake disc; Compare the real-time braking pressure characteristic value with the braking pressure characteristic threshold; If the real-time braking pressure characteristic value is not less than the braking pressure characteristic threshold, determine that the target brake disc has reached the end of its service life; Wherein, the obtaining of the real-time braking pressure characteristic value of the target brake disc includes: Based on the braking pressure sensor and the wheel speed sensor, obtain the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value of the target brake disc; Perform weighted processing on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value based on a preset weight value to obtain the real-time braking pressure characteristic value.

2. The vehicle brake disc life limit monitoring method according to claim 1, characterized in that After the step of obtaining the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value of the target brake disc based on the braking pressure sensor and the wheel speed sensor, it further includes: Judge whether the real-time braking pressure fluctuation value is greater than a preset extreme value of braking pressure fluctuation; If the real-time braking pressure fluctuation value is greater than the preset extreme value of braking pressure fluctuation, determine that the target brake disc has reached the end of its service life; If the real-time braking pressure fluctuation value is not greater than the preset extreme value of braking pressure fluctuation, perform the step of performing weighted processing on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value based on the preset weight value to obtain the real-time braking pressure characteristic value.

3. The vehicle brake disc life limit monitoring method according to claim 1, characterized in that, After the step of obtaining the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value of the target brake disc based on the braking pressure sensor and the wheel speed sensor, it further includes: Judge whether the real-time braking pressure fluctuation slope value is greater than a preset extreme value of braking pressure fluctuation slope; If the real-time braking pressure fluctuation slope value is greater than the preset extreme value of braking pressure fluctuation slope, determine that the target brake disc has reached the end of its service life; If the real-time braking pressure fluctuation slope value is not greater than the preset extreme value of braking pressure fluctuation slope, perform the step of performing weighted processing on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value based on the preset weight value to obtain the real-time braking pressure characteristic value.

4. The method for monitoring the life limit of a vehicle brake disc according to claim 1, wherein: The real-time braking pressure fluctuation value is used to characterize the thickness difference of the target brake disc, and the real-time braking pressure fluctuation slope value is used to characterize the radial runout performance and roughness of the target brake disc.

5. The method for monitoring the life limit of a vehicle brake disc according to claim 1, characterized in that, Before the step of obtaining the real-time braking pressure characteristic value of the target brake disc, it further includes: Conduct a vehicle braking simulation on the brake disc that has reached the end of its service life to obtain the extreme value of braking pressure fluctuation and the extreme value of braking pressure fluctuation slope; Based on a preset weight value, perform weighting on the extreme value of braking pressure fluctuation and the extreme value of braking pressure fluctuation slope to obtain the braking pressure characteristic threshold.

6. The vehicle brake disc life limit monitoring method according to claim 1, characterized in that, After the step of if the real-time braking pressure characteristic value is not less than the braking pressure characteristic threshold, determine that the target brake disc has reached the end of its service life, it further includes: Send a prompt message for prompting that the target brake disc has reached the end of its service life and needs to be replaced to the instrument panel for display.

7. A vehicle brake disc life limit monitoring device, characterized in that, Including: An obtaining unit, which is used to obtain the real-time braking pressure characteristic value of the target brake disc; A monitoring unit, which is configured to compare the real-time braking pressure characteristic value with a braking pressure characteristic threshold value; if the real-time braking pressure characteristic value is not less than the braking pressure characteristic threshold value, it is determined that the target brake disc has reached the end of its service life; The obtaining unit is specifically configured to: Obtain the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value of the target brake disc based on a braking pressure sensor and a wheel speed sensor; Perform a weighting process on the real-time braking pressure fluctuation value and the real-time braking pressure fluctuation slope value based on a preset weighting value to obtain a real-time braking pressure characteristic value.

8. A vehicle brake disc life limit monitoring device, characterized in that, Comprising: A memory and a processor, wherein at least one instruction is stored in the memory, and the at least one instruction is loaded and executed by the processor to implement the vehicle brake disc service life limit monitoring method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, it implements the vehicle brake disc service life limit monitoring method according to any one of claims 1 to 6.

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