On-off wear sensor alarm method and system

Abstract

The invention relates to an on-off type wear sensor alarm method and system, and the method comprises the steps: collecting the circuit break condition of a brake lining alarm circuit during the braking of a vehicle when the vehicle is ignited, started and runs, and accumulating the number of times of circuit break; if the accumulated breaking times are equal to the set times, it is judged that the brake lining is abraded, a brake lining abrasion alarm is given out, and the set times are larger than one; otherwise, continuing to accumulate. According to the method, after the vehicle is ignited, started and driven, the open circuit condition of the alarm circuit of the brake lining is collected when the vehicle is braked, the brake lining abrasion alarm is given out only when the accumulated open circuit frequency is equal to the set frequency, and the set frequency is larger than one, so that the false alarm frequency of brake lining abrasion is reduced; and the fault judgment false alarm of a brake lining alarm circuit is avoided, and the frequency of unnecessary brake lining inspection of a driver is reduced.

Description

Technical Field

[0001] The present application relates to the automotive field, and in particular to an on-off wear sensor alarm method and system thereof. Background Art

[0002] At present, the most commonly used on-off wear sensor is to embed the wear alarm line in the brake lining, and the alarm line is connected from the wheel end brake to the instrument controller in the cab. The embedded depth is designed to leave a certain residual thickness when the brake lining is about to be worn out.

[0003] When the wear alarm circuit is connected, the instrument controller thinks that the brake lining has not been completely worn out. When the circuit is broken, the instrument controller thinks that the brake lining has been worn to the preset position, and then it will remind the driver: the brake lining is worn. The driver should check the brake lining and replace it with a new one.

[0004] However, this technical solution only determines whether the brake lining is worn to the preset position through the passage and disconnection of the circuit, and does not take into account disconnection caused by assembly, damage, etc. of the wear circuit itself, which may misjudge that the brake lining is worn to the preset position. Summary of the invention

[0005] The present application provides an on-off wear sensor alarm method and system thereof, which can solve the problem in the prior art of misjudgment caused by disconnection of the wear circuit itself due to assembly, damage, etc.

[0006] In a first aspect, an embodiment of the present application provides an on-off wear sensor alarm method, the on-off wear sensor alarm method comprising:

[0007] When the vehicle is started and running, the brake pad alarm circuit disconnection situation during vehicle braking is collected, and the number of disconnections is accumulated;

[0008] If the accumulated number of disconnections is equal to a set number, it is determined that the brake lining is worn and a brake lining wear alarm is issued, and the set number is greater than one;

[0009] Otherwise, continue accumulating.

[0010] In combination with the first aspect, in one implementation, after the vehicle is ignited and started and before driving, the method further includes:

[0011] Perform self-check on brake lining alarm circuit;

[0012] If the brake lining alarm circuit is broken, a brake lining wear circuit break alarm will be issued.

[0013] In combination with the first aspect, in one implementation, self-checking the brake lining alarm circuit specifically includes:

[0014] After the vehicle ignition is started for a set time, it is determined whether the disconnection time of the brake lining alarm circuit exceeds the set value;

[0015] If so, it is determined that the brake lining alarm circuit is open;

[0016] Otherwise, determine whether the brake lining alarm circuit is open.

[0017] In combination with the first aspect, in one implementation, after issuing a brake lining wear circuit disconnection alarm, the method further includes:

[0018] If the vehicle is restarted, the brake lining wear circuit disconnection alarm will continue to sound.

[0019] In combination with the first aspect, in one implementation, after issuing a brake lining wear circuit disconnection alarm, the method further includes:

[0020] Before the vehicle is driven, when the vehicle ignition start time exceeds the ignition start setting threshold and the brake lining alarm circuit access time exceeds the first access setting threshold, the brake lining wear circuit disconnection alarm is released.

[0021] In combination with the first aspect, in one implementation, when the vehicle is ignited and started and is driving, the disconnection of the brake lining alarm circuit during vehicle braking is collected, and the number of disconnections is accumulated, and the specific steps include:

[0022] When the vehicle is started and running, if the brake signal is detected, the brake lining alarm circuit is judged to be on or off;

[0023] If the brake lining alarm circuit is disconnected within the set time after the brake signal is collected, counting is performed;

[0024] The number of circuit breakers is accumulated.

[0025] In combination with the first aspect, in one implementation, if the brake lining alarm circuit is disconnected within a set time after the brake signal is collected, counting is performed, specifically including:

[0026] If the brake lining alarm circuit is disconnected for the set time within the set time after the brake signal is collected, counting will be performed.

[0027] In combination with the first aspect, in one implementation, after issuing a brake lining wear alarm, the method further includes:

[0028] If the vehicle is restarted, the brake lining wear warning continues.

[0029] In combination with the first aspect, in one implementation, after issuing a brake lining wear alarm, the method further includes:

[0030] When the brake lining alarm circuit passage time exceeds the second passage set threshold, the brake lining wear alarm is released.

[0031] In a second aspect, an embodiment of the present application provides an on-off wear sensor alarm system, which includes: a first module and a second module, the first module is used to collect the circuit breaking situation of the brake lining alarm circuit when the vehicle is braked after the ignition is started and the vehicle is driving, and accumulate the number of circuit breaking times; the second module is used to compare the accumulated number of circuit breaking times with the set number of times, if the accumulated number of circuit breaking times is equal to the set number of times, it is determined that the brake lining is worn, and a brake lining wear alarm is issued; otherwise, the accumulation continues;

[0032] The set number of times is greater than one.

[0033] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0034] The embodiment of the present application provides an on-off wear sensor alarm method and system thereof, which collects the circuit breakage conditions of the brake lining alarm circuit when the vehicle brakes after the ignition is started and driving, and issues a brake lining wear alarm only when the accumulated number of circuit breakages is equal to the set number of times. Since the set number of times is greater than one, it not only reduces the number of false alarms of brake lining wear, but also avoids false alarms of brake lining alarm circuit faults, thereby reducing the number of unnecessary brake lining inspections by the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a flow chart of the on-off wear sensor alarm method of this application;

[0036] Figure 2 This is a flow chart of the self-test method in the on-off wear sensor alarm method of this application;

[0037] Figure 3 For this application Figure 1 Detailed flowchart of step 101 in FIG. DETAILED DESCRIPTION

[0038] 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 are within the scope of protection of this application.

[0039] See also Figures 1 to 3The present application provides an on-off wear sensor alarm method and system thereof, which can solve the problem of misjudgment in the prior art due to disconnection caused by the wear circuit itself due to assembly, damage, etc.

[0040] At present, the most commonly used on-off wear sensor is to embed the wear alarm line in the brake lining, and the alarm line is connected from the wheel end brake to the instrument controller in the cab. The embedded depth is designed to leave a certain residual thickness when the brake lining is about to be worn out.

[0041] When the wear alarm circuit is connected, the instrument controller thinks that the brake lining has not been completely worn out. When the circuit is broken, the instrument controller thinks that the brake lining has been worn to the preset position, and then it will remind the driver: the brake lining is worn. The driver should check the brake lining and replace it with a new one.

[0042] However, this technical solution only determines whether the brake lining is worn to the preset position through the passage and disconnection of the circuit, and does not take into account disconnection caused by assembly, damage, etc. of the wear circuit itself, which may misjudge that the brake lining is worn to the preset position.

[0043] In view of the problem in the prior art that misjudgment may occur due to disconnection caused by the wear circuit itself due to assembly, damage, etc., in a first aspect, an embodiment of the present application provides an on-off wear sensor alarm method, and the on-off wear sensor alarm method includes:

[0044] 101: When the vehicle is started and running, the disconnection condition of the brake lining alarm circuit during vehicle braking is collected, and the number of disconnections is accumulated;

[0045] 102: If the accumulated number of disconnections is equal to the set number, it is determined that the brake lining is worn and a brake lining wear alarm is issued, and the set number is greater than one;

[0046] 103: Otherwise, continue to accumulate.

[0047] In the present application, by adding the conditions of vehicle driving state and vehicle braking state, it is identified that the vehicle is in a dynamic state and the service brake is in working state, that is, when the vehicle is ignited and started and driving, and the circuit break condition of the brake lining alarm circuit during vehicle braking is collected. When the accumulated number of circuit breakages is equal to the set number of times, the brake lining wear alarm will be issued. Since the set number of times is greater than one, not only the number of false alarms of brake lining wear is reduced, but also the false alarm of brake lining alarm circuit fault judgment is avoided, thereby reducing the number of unnecessary brake lining inspections by the driver.

[0048] More specifically, the "driving" here refers to the vehicle speed being greater than 0, that is, when the vehicle is ignited and started and the vehicle speed is greater than 0, the brake lining alarm circuit open condition during vehicle braking will be collected only when the vehicle is braked. The service braking operation when the vehicle is stationary or in a static state will not cause relative movement between the brake lining and the opponent (such as a brake drum or brake disc), so the brake lining alarm circuit open condition during vehicle braking will not be collected.

[0049] After the vehicle is started, there is a period of time when the vehicle speed is equal to 0. Therefore, based on the above embodiment, in this embodiment, after the vehicle is started and before driving, the method further includes a step 100 of system self-checking. Therefore, after the vehicle is started, the vehicle speed needs to be judged. When the vehicle speed is equal to 0, the system self-checking is performed in step 100. When the vehicle speed is greater than 0, the brake lining alarm circuit disconnection situation when the vehicle is braked is collected.

[0050] Wherein step 100 system self-check specifically includes step 1001 to step 1002:

[0051] Step 1001: Perform a self-check on the brake lining alarm circuit.

[0052] Specifically, the brake lining alarm circuit is self-checked, including steps 10011 to 10013:

[0053] Step 10011: after the vehicle ignition is started for a set time, determine whether the brake lining alarm circuit disconnection time exceeds a set value;

[0054] Step 10012: If yes, determine that the brake lining alarm circuit is open;

[0055] Step 10013: Otherwise, determine the brake pad alarm circuit path.

[0056] First, after the vehicle ignition is started for a set time, and when the vehicle speed is equal to 0, the brake lining alarm circuit fault judgment mode is entered. In order to avoid false alarms, it is necessary to judge whether the brake lining alarm circuit disconnection time exceeds the set value at this time. If the brake lining alarm circuit disconnection time exceeds the set value, it means that the brake lining alarm circuit is disconnected. If the brake lining alarm circuit disconnection time does not exceed the set value, it means that the brake lining alarm circuit is connected. Among them, when the brake lining alarm circuit disconnection time is equal to 0, it means that the brake lining alarm circuit is connected.

[0057] In this embodiment, if the brake lining alarm circuit disconnection time is set to exceed 10s, the brake lining alarm circuit is judged to be disconnected. In other embodiments, the size of the set value can be set as needed, and the embodiment of the present application does not limit it.

[0058] Step 1002: If the brake lining alarm circuit is disconnected, a brake lining wear circuit disconnection alarm is issued.

[0059] When the brake lining alarm circuit disconnection time exceeds the set value, the brake lining alarm circuit is judged to be disconnected, and then a brake lining wear circuit disconnection alarm is issued. At this time, the instrument can prompt "brake lining wear circuit disconnection" or a voice prompt "brake lining wear circuit disconnection" can be issued. In this application, there is no restriction on the way of issuing the brake lining wear circuit disconnection alarm.

[0060] On the basis of the above embodiment, in this embodiment, after issuing the brake lining wear circuit disconnection alarm, the method further includes: if the vehicle is restarted, continuing to issue the brake lining wear circuit disconnection alarm.

[0061] That is to say, after the brake lining wear circuit short alarm is issued, the memory mode will be turned on. When the vehicle is started again, the brake lining wear circuit short alarm will continue to be issued to avoid the situation where the brake lining wear circuit is not inspected or replaced and the vehicle is used directly.

[0062] After the brake lining wear circuit open alarm is issued, the method also includes: before the vehicle travels, when the vehicle ignition start time exceeds the ignition start set threshold and the brake lining alarm circuit passage time exceeds the first passage set threshold, the brake lining wear circuit open alarm is released.

[0063] That is to say, when the vehicle speed is equal to 0, the brake lining wear circuit open alarm will only be exited when the vehicle ignition start time exceeds the ignition start setting threshold and the brake lining alarm circuit passage time exceeds the first passage setting threshold, and the brake lining wear circuit will be checked again.

[0064] In this embodiment, the brake lining wear circuit disconnection alarm is exited only after the vehicle ignition start time exceeds 10 seconds and the brake lining alarm circuit access time exceeds 10 seconds. In other embodiments, the ignition start setting threshold and the first access setting threshold can be set as needed, and the embodiment of the present application does not limit them.

[0065] Furthermore, after the brake lining wear circuit disconnection alarm is exited, the vehicle speed is continued to be judged. If the vehicle speed is still equal to 0 at this time, the system self-check can be stopped, that is, before the vehicle is driven, the system self-check is only performed once, and then the vehicle is waited for to drive, that is, when the vehicle speed is greater than 0, the brake lining alarm circuit disconnection situation during vehicle braking is collected; the system self-check steps can also be repeated. The specific method can be selected according to the actual situation.

[0066] On the basis of the above embodiment, in this embodiment, when the vehicle is ignited and started and is driving, the disconnection situation of the brake lining alarm circuit during vehicle braking is collected, and the number of disconnections is accumulated. The specific steps include 1011 to 1013:

[0067] Step 1011: When the vehicle is ignited and started and is driving, when a brake signal is detected, it is determined whether the brake lining alarm circuit is on or off.

[0068] Specifically, when the vehicle speed is greater than 0, the brake lining wear judgment mode is entered. If the EBC5 signal is monitored to change from 0 to 1, the on-off judgment of the brake lining alarm circuit is started. In order to facilitate the understanding of the present application by those skilled in the art, the EBC5 signal terminology in the present application is explained: the EBC5 signal is a signal defined in the SAE J1939 communication protocol, and its name is Electronic Brake Controller 5. This signal defines the activation state of the service brake. The driver's brake pedal, parking brake operation, external brake request and other signal sources can all control the service brake operation, and the service brake operation is achieved by friction deceleration of the brake lining.

[0069] Step 1012: If the brake lining alarm circuit is disconnected within a set time after the brake signal is collected, counting is performed;

[0070] Specifically, if the brake lining alarm circuit is disconnected within a set time after the brake signal is collected, counting is performed, which specifically includes: if the brake lining alarm circuit is disconnected for a set time within a set time after the brake signal is collected, counting is performed.

[0071] In the present application, when it is monitored that the brake lining alarm circuit is disconnected for a continuous set time within the set time after the EBC5 signal changes from 0 to 1, it is counted once.

[0072] In this embodiment, the setting time is set to 10s and the setting time is set to 5s. In other embodiments, the setting time and the size of the setting time can be set as needed, and the embodiment of the present application does not limit it.

[0073] Step 1013: Accumulate the number of circuit breaks.

[0074] Specifically, while the vehicle is running, steps 1011 to 1012 are repeated. If the cumulative count reaches a set number of times when the vehicle is ignited and running, it is determined that the brake lining is worn, and a brake lining wear alarm is issued. In this embodiment, the set number of times is 3 times, that is, when the cumulative count reaches 3 times, a brake lining wear alarm is issued.

[0075] Based on the above embodiment, in this embodiment, after the brake lining wear alarm is issued, the method further includes:

[0076] If the vehicle is restarted, the brake lining wear warning continues.

[0077] That is to say, after the brake lining wear alarm is issued, the memory mode will be turned on. When the vehicle is started again, the brake lining wear alarm will continue to be issued to avoid the situation where the vehicle is used directly without inspecting or replacing the brake lining wear circuit.

[0078] After the brake lining wear circuit disconnection alarm is issued, the method further includes: when the brake lining alarm circuit access time exceeds a second access set threshold, the brake lining wear alarm is released.

[0079] That is, after the vehicle is restarted, the brake lining wear alarm will be exited only when it is detected that the brake lining alarm circuit passage time exceeds the second passage set threshold value, so as to check the brake lining wear circuit again.

[0080] In this embodiment, the brake lining wear alarm is not terminated until the vehicle is restarted and the brake lining alarm circuit is open for more than 10 seconds. In other embodiments, the second path setting threshold value may be set as required, and the embodiment of the present application does not limit it.

[0081] Furthermore, after exiting the second path to set the threshold, the vehicle speed is judged. If the vehicle speed is equal to 0 at this time, a system self-check can be performed, that is, before the vehicle moves, a system self-check is performed and then the vehicle is waited for to move; when the vehicle speed is greater than 0, the brake lining alarm circuit breakage condition during vehicle braking is collected again.

[0082] In summary, the present application can reduce the number of false alarms of brake linings through the on-off wear sensor alarm method; reduce the number of unnecessary inspections of friction pads by the driver, for example, when there is a brake lining wear alarm on a new car, the driver can just make a judgment without having to check the brake lining immediately; clearly locate whether the brake lining is worn or the wear circuit is faulty, thereby improving maintenance efficiency.

[0083] In the second aspect, an embodiment of the present application provides an on-off wear sensor alarm system, which includes: a first module and a second module; the first module is used to collect the circuit break conditions of the brake lining alarm circuit during vehicle braking after the vehicle is ignited and started and is driving, and to accumulate the number of circuit breakages; the second module is used to compare the accumulated number of circuit breakages with the set number of times, if the accumulated number of circuit breakages is equal to the set number of times, it is judged that the brake lining is worn, and a brake lining wear alarm is issued; otherwise, accumulation continues.

[0084] In the present application, by adding the conditions of vehicle driving state and vehicle braking state, it is identified that the vehicle is in a dynamic state and the service brake is in working state, that is, when the vehicle is ignited and started and driving, and the circuit break condition of the brake lining alarm circuit during vehicle braking is collected. When the accumulated number of circuit breakages is equal to the set number of times, the brake lining wear alarm will be issued. Since the set number of times is greater than one, not only the number of false alarms of brake lining wear is reduced, but also the false alarm of brake lining alarm circuit fault judgment is avoided, thereby reducing the number of unnecessary brake lining inspections by the driver.

[0085] Furthermore, in some embodiments, the on-off wear sensor alarm system further includes a third module, wherein the third module is used to perform a self-check on the brake lining alarm circuit, and to issue a brake lining wear circuit open alarm if the brake lining alarm circuit is open.

[0086] Furthermore, in some embodiments, the third module is also used to determine whether the brake lining alarm circuit disconnection time exceeds a set value after the vehicle ignition is started for a set time; if so, determine that the brake lining alarm circuit is disconnected; otherwise, determine that the brake lining alarm circuit is open.

[0087] Furthermore, in some embodiments, the on-off wear sensor alarm system further includes a fourth module, wherein the fourth module is configured to continue to issue a brake lining wear circuit open alarm if the vehicle is restarted after issuing the brake lining wear circuit open alarm.

[0088] Furthermore, in some embodiments, the on-off wear sensor alarm system also includes a fifth module, which is used to cancel the brake lining wear circuit open alarm after issuing the brake lining wear circuit open alarm and before the vehicle is driven, when the vehicle ignition start time exceeds the ignition start set threshold and the brake lining alarm circuit passage time exceeds the first passage set threshold.

[0089] Furthermore, in some embodiments, the first module is also used to determine whether the brake lining alarm circuit is on or off when a brake signal is detected when the vehicle is ignited and driving; if the brake lining alarm circuit is disconnected within a set time after the brake signal is collected, counting is performed; and the number of circuit breaks is accumulated.

[0090] Furthermore, in some embodiments, the first module is also used to count if the brake lining alarm circuit is disconnected for a set time within a set time after the brake signal is collected.

[0091] Furthermore, in some embodiments, the on-off wear sensor alarm system further includes a sixth module, wherein the sixth module is configured to continue to issue the brake lining wear alarm if the vehicle is restarted after issuing the brake lining wear alarm.

[0092] Furthermore, in some embodiments, the on-off wear sensor alarm system further includes a seventh module, which is used to release the brake lining wear alarm after issuing the brake lining wear alarm and when the brake lining alarm circuit passage time exceeds a second passage set threshold.

[0093] Among them, the functional implementation of each module in the above-mentioned on-off wear sensor alarm device corresponds to the various steps in the above-mentioned on-off wear sensor alarm method embodiment, and its functions and implementation processes will not be repeated here one by one.

[0094] In a third aspect, an embodiment of the present application provides an on-off wear sensor alarm device. In the embodiment of the present application, the on-off wear sensor alarm device may include a processor, a memory, a communication interface, and a communication bus.

[0095] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0096] The communication interface includes an input / output (I / O) interface, a physical interface, and a logical interface, which are used to interconnect the components inside the on-off wear sensor alarm device, and an interface used to interconnect the on-off wear sensor alarm device with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, an optical fiber interface, an ATM interface, etc.; the user device can be a display, a keyboard, etc.

[0097] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0098] The processor may be a general-purpose processor, which may call the on-off wear sensor alarm program stored in the memory and execute the on-off wear sensor alarm method provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the on-off wear sensor alarm program is called may refer to the various embodiments of the on-off wear sensor alarm method of the present application, which will not be described in detail here.

[0099] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0100] The computer-readable storage medium of the present application stores an on-off wear sensor alarm program, wherein when the on-off wear sensor alarm program is executed by a processor, the steps of the on-off wear sensor alarm method as described above are implemented.

[0101] Among them, the method implemented when the on-off wear sensor alarm program is executed can refer to the various embodiments of the on-off wear sensor alarm method of the present application, and will not be repeated here.

[0102] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0103] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0104] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0105] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0106] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0107] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0108] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An on-off wear sensor alarm method, characterized in that: The on-off wear sensor alarm method comprises: When the vehicle is started and running, the brake pad alarm circuit disconnection situation during vehicle braking is collected, and the number of disconnections is accumulated; If the accumulated number of disconnections is equal to a set number, it is determined that the brake lining is worn and a brake lining wear alarm is issued, and the set number is greater than one; Otherwise, continue accumulating.

2. The on-off wear sensor alarm method according to claim 1, characterized in that: After the vehicle is ignited and before driving, the method further includes: Perform self-check on brake lining alarm circuit; If the brake lining alarm circuit is broken, a brake lining wear circuit break alarm will be issued.

3. The on-off wear sensor alarm method according to claim 2, characterized in that: Perform a self-check on the brake lining alarm circuit, including: After the vehicle ignition is started for a set time, it is determined whether the disconnection time of the brake lining alarm circuit exceeds the set value; If so, it is determined that the brake lining alarm circuit is open; Otherwise, determine whether the brake lining alarm circuit is open.

4. The on-off wear sensor alarm method according to claim 2, characterized in that: After the brake lining wear circuit disconnection alarm is issued, the method further includes: If the vehicle is restarted, the brake lining wear circuit disconnection alarm will continue to sound.

5. The on-off wear sensor alarm method according to claim 2, characterized in that: After the brake lining wear circuit disconnection alarm is issued, the method further includes: Before the vehicle travels, when the vehicle ignition start time exceeds the ignition start setting threshold, and the brake lining alarm circuit access time exceeds the first access setting threshold, the brake lining wear circuit disconnection alarm is released.

6. The on-off wear sensor alarm method according to claim 1, characterized in that: When the vehicle is started and running, the disconnection of the brake lining alarm circuit during vehicle braking is collected, and the number of disconnections is accumulated. The specific steps include: When the vehicle is started and running, if the brake signal is detected, the brake lining alarm circuit is judged to be on or off; If the brake lining alarm circuit is disconnected within the set time after the brake signal is collected, counting is performed; The number of circuit breakers is accumulated.

7. The on-off wear sensor alarm method according to claim 6, characterized in that: If the brake lining alarm circuit is disconnected within the set time after the brake signal is collected, counting will be performed, including: If the brake lining alarm circuit is disconnected for the set time within the set time after the brake signal is collected, counting will be performed.

8. The on-off wear sensor alarm method according to claim 1, characterized in that: After the brake lining wear alarm is issued, the method further includes: If the vehicle is restarted, the brake lining wear warning continues.

9. The on-off wear sensor alarm method according to claim 1, characterized in that: After the brake lining wear alarm is issued, the method further includes: When the brake lining alarm circuit passage time exceeds the second passage set threshold, the brake lining wear alarm is released.

10. An on-off wear sensor alarm system, characterized in that: It includes: The first module is used to collect the disconnection situation of the brake lining alarm circuit when the vehicle is braked after the vehicle is ignited and started and is running, and to accumulate the number of disconnections; The second module is used to compare the accumulated number of circuit breaks with the set number of times. If the accumulated number of circuit breaks is equal to the set number of times, it is determined that the brake lining is worn and a brake lining wear alarm is issued; otherwise, the accumulation continues; The set number of times is greater than one.

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