Method and device for detecting a fault point of a brake force detection system

Abstract

The application discloses a kind of methods and devices for detecting brake force detection system failure point.It includes: receiving false alarm report issued by brake force detection system;Judge whether to meet brake force detection condition;If the brake force detection condition is met, the first detection point marked in the first circuit of the brake force detection system is detected in turn, and the on-off state of each first detection point after detection is obtained;The first detection point includes at least two kinds as follows: the first detection point is the circuit line between two adjacent electrical elements in the first circuit, or the circuit line close to a certain electrical element;The first circuit includes the electrical element for detecting brake force;According to the on-off state of each first detection point after detection, determine the first target failure point from the first failure point set;By setting detection point in circuit, according to the on-off state of each detection point, the failure point is quickly determined, and the detection efficiency and detection accuracy are improved.

Description

Technical Field

[0001] This invention belongs to the field of vehicle technology, and more specifically, relates to a method and apparatus for detecting fault points in a braking force detection system. Background Technology

[0002] In the existing technology, the braking force of the EMU needs to be detected during operation to facilitate subsequent processing and operation. However, due to occasional faults in the braking detection system circuit, false alarms of insufficient braking force may occur. In this case, the fault points in the circuit are usually checked and detected manually one by one, which still has the problems of low efficiency and low detection accuracy.

[0003] In view of this, the present invention is proposed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a method and apparatus for detecting fault points in a braking force detection system, which can solve the problem of low accuracy in fault point judgment of the braking force detection system in the prior art.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides a method for detecting fault points in a braking force detection system, comprising:

[0007] Receive false alarms from the braking force detection system;

[0008] Determine whether the braking force testing conditions are met;

[0009] If the braking force detection conditions are met, the first detection points marked in the first circuit of the braking force detection system are sequentially detected to obtain the gain and loss of power status of each first detection point after detection; the first detection point includes at least the following two types: the first detection point is a circuit line between two adjacent electrical components in the first circuit, or a circuit line close to a certain electrical component; the first circuit includes an electrical component for detecting braking force;

[0010] The first target fault point is determined from the first fault point set based on the power gain / loss status of each first detection point after the detection.

[0011] Optionally, the first fault point set includes a mapping relationship between each first fault point and at least one first detection point for the standard power gain / loss state; determining the first target fault point from the first fault point set based on the power gain / loss state of each first detection point after detection includes:

[0012] Based on the power gain and loss status of each first detection point after the detection, a first target fault point is determined from all the first fault points that matches the power gain and loss status of each first detection point after the detection; the standard power gain and loss status of all first detection points corresponding to the first target fault point is the same as the power gain and loss status of each first detection point after the detection.

[0013] Optionally, the method further includes:

[0014] If the braking force detection conditions are not met, the second detection points marked in the second circuit are detected sequentially to obtain the gain and loss states of each second detection point after detection; the second detection point includes at least the following two types: the second detection point is a circuit line between two adjacent electrical components in the second circuit, or a circuit line close to a certain electrical component; the second circuit does not contain an electrical component for detecting braking force;

[0015] The second target fault point is determined from the set of second fault points based on the gain and loss of power at each of the second detection points after the detection.

[0016] Optionally, the second fault point set includes a mapping relationship between each second fault point and at least one second detection point for the standard power gain / loss state. Determining a second target fault point from the second fault point set based on the power gain / loss state of each detected second detection point includes:

[0017] Based on the power gain and loss status of each second detection point after the detection, a second target fault point is determined from the second fault points that matches the power gain and loss status of each second detection point after the detection; the standard power gain and loss status of all second detection points corresponding to the second target fault point is the same as the power gain and loss status of each second detection point after the detection.

[0018] Optionally, the method further includes:

[0019] The first target fault point and the second target fault point can be either any circuit line close to the same electrical component or the same electrical component.

[0020] In a second aspect, the present invention provides an apparatus for detecting fault points in a braking force detection system, comprising:

[0021] The receiving module is used to receive false alarms from the braking force detection system;

[0022] The judgment module is used to determine whether the braking force detection conditions are met;

[0023] The first detection module is used to sequentially detect the first detection points marked in the first circuit of the braking force detection system if the braking force detection conditions are met, and obtain the gain and loss state of each first detection point after detection; the first detection point includes at least the following two types: the first detection point is a circuit line between two adjacent electrical components in the first circuit, or a circuit line close to a certain electrical component; the first circuit includes an electrical component for detecting braking force;

[0024] The first determining module is used to determine the first target fault point from the first fault point set based on the power gain and loss status of each first detection point after detection.

[0025] Optionally, the first set of fault points includes a mapping relationship between each first fault point and at least one first detection point for the standard gain / loss of power; the first determining module includes:

[0026] The first determining unit is configured to determine a first target fault point from all the first fault points that matches the power gain and loss status of the first detection points after the detection, based on the power gain and loss status of each first detection point after the detection; the standard power gain and loss status of all the first detection points corresponding to the first target fault point is the same as the power gain and loss status of each first detection point after the detection.

[0027] Optionally, the first detection module includes:

[0028] The second detection unit is used to sequentially detect the second detection points marked in the second circuit if the braking force detection conditions are not met, and obtain the gain and loss state of each second detection point after detection; the second detection point includes at least the following two types: the second detection point is a circuit line between two adjacent electrical components in the second circuit, or a circuit line close to a certain electrical component; the second circuit does not contain an electrical component for detecting braking force;

[0029] The second determining unit is used to determine the second target fault point from the second fault point set based on the power gain and loss status of each second detection point after the detection.

[0030] Optionally, the second fault point set includes a mapping relationship between each second fault point and at least one second detection point for the standard gain / loss state. The second determining unit further includes:

[0031] The third determining unit is used to determine a second target fault point from the second fault points that matches the power gain and loss status of the second detection points after the detection, based on the power gain and loss status of each second detection point after the detection; the standard power gain and loss status of all second detection points corresponding to the second target fault point is the same as the power gain and loss status of each second detection point after the detection.

[0032] Optional, also includes:

[0033] The first target fault point and the second target fault point can be either any circuit line close to the same electrical component or the same electrical component.

[0034] This invention employs the above four steps: receiving false alarms from the braking force detection system; determining whether the braking force detection conditions are met; if the braking force detection conditions are met, sequentially detecting the first detection points marked in the first circuit where the braking force detection system is located, and obtaining the gain / loss status of each first detection point after detection; the first detection point includes at least the following two types: the first detection point is a circuit line between two adjacent electrical components in the first circuit, or a circuit line close to a certain electrical component; the first circuit contains an electrical component for detecting braking force; and determining a first target fault point from a first fault point set based on the gain / loss status of each first detection point after detection. By setting detection points in the circuit and quickly determining the fault point based on the gain / loss status of each detection point, detection efficiency and detection accuracy are improved.

[0035] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0036] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0037] Figure 1 This is a flowchart illustrating a method for detecting fault points in a braking force detection system according to an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the first circuit diagram provided in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the second circuit diagram provided in an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of a device for detecting fault points in a braking force detection system provided in an embodiment of the present invention;

[0041] In the diagram: U1, relay UBR; U2, relay UBTR1; U3, relay UBTR2; U4, relay UBTRTD; U5, vehicle information control device;

[0042] S1, contact switch UBTRTD; S2, contact switch UBR; S3, contact switch UBCDR; S4, contact switch UBTR1; S5, contact switch UBTR2;

[0043] Points 1-7 are all testing points.

[0044] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0046] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] like Figure 1 As shown, a method for detecting braking force using an embodiment of the present invention includes:

[0049] S101, Receive false alarms from the braking force detection system;

[0050] S102. Determine whether the braking force detection conditions are met;

[0051] S103. If the braking force detection conditions are met, the first detection points marked in the first circuit of the braking force detection system are sequentially detected to obtain the gain and loss states of each first detection point after detection. The first detection point includes at least the following two types: the first detection point is a circuit line between two adjacent electrical components in the first circuit, or a circuit line close to a certain electrical component; the first circuit includes an electrical component for detecting braking force.

[0052] S104. Determine the first target fault point from the first fault point set based on the power gain / loss status of each first detection point after the detection.

[0053] In step S101 above, the false alarm is a false alarm of insufficient braking force reported by the EMU.

[0054] In this invention, the braking force detection system can be used in pure electric vehicles and automobiles. The system can use either an electric braking detection module or an air braking detection module to detect the braking force pressure. When an electric braking detection module is used, the system includes a relay UBCDR. When the UBCDR is energized, it indicates that the braking force meets the requirements, thus completing the insufficient braking force detection. When an air braking detection module is used, if the pressure reaches the set value of the pressure switch, it indicates that the braking force meets the requirements, thus completing the insufficient braking force detection.

[0055] like Figure 2 As shown, the first circuit containing the braking force detection system includes a power supply, a contact switch UBCDR controlled by relay UBCDR, a relay UBTRTD, a contact switch UBTRTD controlled by relay UBTRTD, a relay UBTR1, a relay UBTR2, a contact switch UBTR1 controlled by relay UBTR1, a contact switch UBTR2 controlled by relay UBTR2, and a vehicle information control device connected to contact switch UBTR2. Specifically, two branches extend from the circuit line connected to the power supply. The first branch has contact switches UBCDR, UBTR1, and relay UBTRTD from top to bottom, and the second branch has contact switches UBTRTD controlled by relay UBTRTD, relay UBTR1, and relay UBTR2 from top to bottom. The other circuit connected to other power supplies includes a contact switch UBTR2 controlled by relay UBTR2 and a vehicle information control device connected to the contact switch.

[0056] Taking the electric brake detection module in the braking force detection system as an example, if the braking force test meets the requirements, the relay UBCDR is energized, the contact switch UBCDR closes, and the first branch connected to the power supply is connected, energizing the relay UBTRTD. Furthermore, the contact switch UBTRTD controlled by the relay UBTRTD closes, connecting the second branch connected to the power supply. Further, relays UBTR1 and UBTR2 are energized, and the contact switch UBTR2 controlled by the relay UBTR2 is energized. Switch UBTR2 is open, and the circuit containing switch UBTR2 cannot operate, so the vehicle information control device will not issue an alarm. Taking the electric brake detection module in the braking force detection system as an example, when the braking force is insufficient and the requirements are not met, the relay UBCDR is de-energized, the contact switch UBCDR opens, and the first and second branches cannot be connected. Relays UBTR1 and UBTR2 are de-energized, and the contact switch UBTR2 controlled by the relay UBTR2 is de-energized. Switch UBTR2 closes, and the circuit containing switch UBTR2 operates normally, causing the vehicle information control device to issue an alarm.

[0057] In step S102 above, the braking force detection condition is used to determine whether the vehicle is currently using deceleration braking.

[0058] When a false alarm is received from the braking force detection system, it is determined whether the braking force detection conditions are met. Generally, when the vehicle speed is greater than 70 km / h and the brake lever is applied at level B7 or above, or when the vehicle speed is less than 70 km / h and the brake lever is applied at level B5 or above, the braking force detection conditions are considered met. In both of these cases, the relay UBR will be de-energized, causing the circuit containing the contact switch UBR controlled by the relay UBR to be de-energized. This will then activate the first circuit of the braking force detection system, which will then determine the fault point that caused the false alarm in the first circuit of the braking force system.

[0059] In step S103 above, when the braking force detection conditions are met, the insufficient braking force detection is started. The first circuit where the braking force detection system is located is connected. If a false alarm is issued during the operation of the first circuit where the braking force detection system is located, the gain and loss status of each first detection point in the first circuit where the braking force detection system is located is detected to obtain the gain and loss status of each first detection point in the first circuit.

[0060] For example, when the braking force detection conditions are met, relay UBR is de-energized, connecting the first circuit where the braking force detection system is located. Six first detection points are set in the first circuit where the braking force detection system is located, namely detection points 2, 3, 4, 5, 6, and 1. Detection point 2 is located at the intersection of the circuit line connected to the power supply and the first branch; detection point 3 is located at the lower end of contact switch UBCDR on the first branch; detection point 4 is located at the upper end of relay UBTRTD on the first branch; detection point 5 is located between contact switch UBTRTD and relay UBTR1 on the second branch; detection point 6 is located between relay UBTR1 and relay UBTR2 on the second branch; detection point 1 is located on the circuit line where contact switch UBTR2 is located and is near contact switch UBTR2.

[0061] The gain and loss status of the above 6 first detection points are detected respectively to obtain the gain and loss status of each of the above 6 detection points. Based on the gain and loss status of the above-marked detection points, the fault point that caused the false alarm is quickly determined.

[0062] In step S104 above, the first fault point set includes the mapping relationship between each first fault point and at least one first detection point. For example, when detection point 2 is energized, detection point 3 is energized, and detection point 4 is de-energized, then the first fault point is contact switch UBTR1; when detection point 2 is energized, detection point 3 is de-energized, and detection point 4 is de-energized, then the relay UBCDR is faulty. When detection point 5 is energized and detection point 6 is de-energized, then the first fault point is relay UBTR1; when detection point 6 is energized, then the first fault point is contact switch UBTR2.

[0063] To gain a more detailed understanding, the first fault point set includes a mapping relationship between each first fault point and at least one first detection point's standard power gain / loss state; step S104, determining the first target fault point from the first fault point set based on the detected power gain / loss state of each first detection point, includes:

[0064] S1041, based on the power gain and loss status of each first detection point after detection, determine a first target fault point from all the first fault points that matches the power gain and loss status of each first detection point after detection; the standard power gain and loss status of all first detection points corresponding to the first target fault point is the same as the power gain and loss status of each first detection point after detection.

[0065] Specifically, since the first fault point set contains the mapping relationship between each first fault point and at least one detection point, when the power-on / off state of each first detection point is detected, such as detection point 2 being in a powered-on state, detection point 3 being in a powered-on state, and detection point 4 being in a powered-off state, and the fault point in the first fault point set is contact switch UBTR1, the judgment is also made through the states of the above-mentioned detection points 2, 3, and 4. Therefore, the first target fault point can be determined as contact switch UBTR1 based on the detected power-on / off state of the above three detection points, and then the fault point contact switch UBTR1 can be processed.

[0066] like Figure 3 As shown, when the vehicle does not brake, i.e., the braking force detection condition is not met, this embodiment of the invention provides a more detailed method, including:

[0067] S105. If the braking force detection condition is not met, the second detection points marked in the second circuit are detected sequentially to obtain the gain and loss state of each second detection point after detection. The second detection point includes at least the following two types: the second detection point is a circuit line between two adjacent electrical components in the second circuit, or a circuit line close to a certain electrical component; the second circuit does not contain an electrical component for detecting braking force.

[0068] S106. Determine the second target fault point from the second fault point set based on the power gain / loss status of each second detection point after the detection.

[0069] In step S105 above, the second circuit does not contain electrical components for detecting braking force, and the brake detection system is not operational. The second circuit includes a relay UBR, a power source, a contact switch UBR controlled by the relay UBR, a relay UBTRTD, a contact switch UBTRTD controlled by the relay UBTRTD, a relay UBTRT1, a relay UBTR2, a contact switch UBTR2 controlled by the relay UBTR1, and a vehicle information control device connected to the contact switch UBTR2. Specifically, the circuit line containing the relay UBR connected to other power sources and the circuit line connected to the power source extend into two branches. The third branch has a contact switch UBTRTD, a relay UBTR1, and a relay UBTR2 arranged from top to bottom. The fourth branch has a contact switch UBR and a relay UBTRTD arranged from top to bottom. A circuit connected to a power source other than the two mentioned above includes a contact switch UBTR2 controlled by the relay UBTR2 and a vehicle information control device connected to the contact switch. The working principle is the same as that of the first circuit, and will not be described further in this invention.

[0070] The second circuit has six detection points: 7, 2, 5, 6, 4, and 1. Detection point 7 is one end of the relay UBR connected to another power source; detection point 2 is the end of the circuit line connected to the power source that is close to the power source; detection point 5 is located between the contact switch UBTRTD and the relay UBTR1 on the third branch; detection point 6 is located between the relay UBTR1 and the relay UBTR2 on the third branch; detection point 4 is located at the upper end of the relay UBTRTD on the first branch; and detection point 1 is located on the circuit line where the contact switch UBTR2 is located and is near the contact switch UBTR2.

[0071] The gain and loss states of each detection point in the second circuit are obtained by detecting the above 6 detection points respectively.

[0072] In step S106 above, the second fault point set includes the mapping relationship between each second fault point and at least one second detection point. For example, when detection point 2 is in a de-energized state, it can be known that the second fault point is detection point 2; when detection point 4 is in an energized state and detection point 5 is in a de-energized state, it can be known that the second fault point is contact switch UBTRTD; when detection point 5 is in an energized state and detection point 6 is in a de-energized state, it can be known that the second fault point is relay UBTR1; when detection point 6 is in an energized state, and a false alarm is still issued, it can be known that contact switch UBTR2 is the second fault point.

[0073] To gain a more detailed understanding, the second fault point set includes a mapping relationship between each second fault point and at least one second detection point's standard power gain / loss state. Based on the power gain / loss state of each second detection point after detection, a second target fault point is determined from the second fault point set. Step S106 includes:

[0074] S1061, based on the power gain and loss status of each second detection point after detection, determine a second target fault point from the second fault points that matches the power gain and loss status of each second detection point after detection; the standard power gain and loss status of all second detection points corresponding to the second target fault point is the same as the power gain and loss status of each second detection point after detection.

[0075] Specifically, since the second fault point set contains the mapping relationship between each second fault point and at least one detection point, when the power-on / power-off state of each second detection point is detected, such as the detection point 5 being in the power-on state and the detection point 6 being in the power-off state, and the fault point in the second fault point set is relay UBTR1, it is also determined by the states of the above-mentioned detection points 5 and 6. Therefore, the second target fault point is determined to be relay UBTR1 based on the detected power-on / power-off states of the above two detection points, and then the fault point relay UBTR1 can be processed.

[0076] Based on the above two embodiments, it can be seen that the first circuit and the second circuit have the same circuit line section, and the same electrical components, contact switches, etc. Therefore, the first fault point and the second fault point may be the same electrical component, or the same part of the circuit line close to the same electrical component.

[0077] like Figure 4 As shown, an embodiment of the present invention provides a device for detecting fault points in a braking force detection system. The device includes: a receiving module 401, a judging module 402, a first detection module 403, and a first determining module 404.

[0078] The receiving module 401 is used to receive false alarms issued by the braking force detection system;

[0079] The judgment module 402 is used to determine whether the braking force detection conditions are met;

[0080] The first detection module 403 is used to sequentially detect the first detection points marked in the first circuit of the braking force detection system if the braking force detection conditions are met, and obtain the gain and loss state of each first detection point after detection; the first detection point includes at least the following two types: the first detection point is a circuit line between two adjacent electrical components in the first circuit, or a circuit line close to a certain electrical component; the first circuit includes an electrical component for detecting braking force.

[0081] The first determining module 404 is used to determine the first target fault point from the first fault point set based on the power gain and loss status of each first detection point after detection.

[0082] Optionally, the first set of fault points includes a mapping relationship between each first fault point and at least one first detection point for the standard gain / loss of power; the first determining module includes:

[0083] The first determining unit is configured to determine a first target fault point from all the first fault points that matches the power gain and loss status of the first detection points after the detection, based on the power gain and loss status of each first detection point after the detection; the standard power gain and loss status of all the first detection points corresponding to the first target fault point is the same as the power gain and loss status of each first detection point after the detection.

[0084] Optionally, the first detection module includes:

[0085] The second detection unit is used to sequentially detect the second detection points marked in the second circuit if the braking force detection conditions are not met, and obtain the gain and loss state of each second detection point after detection; the second detection point includes at least the following two types: the second detection point is a circuit line between two adjacent electrical components in the second circuit, or a circuit line close to a certain electrical component; the second circuit does not contain an electrical component for detecting braking force;

[0086] The second determining unit is used to determine the second target fault point from the second fault point set based on the power gain and loss status of each second detection point after the detection.

[0087] Optionally, the second fault point set includes a mapping relationship between each second fault point and at least one second detection point for the standard gain / loss state. The second determining unit further includes:

[0088] The third determining unit is used to determine a second target fault point from the second fault points that matches the power gain and loss status of the second detection points after the detection, based on the power gain and loss status of each second detection point after the detection; the standard power gain and loss status of all second detection points corresponding to the second target fault point is the same as the power gain and loss status of each second detection point after the detection.

[0089] Optional, also includes:

[0090] The first target fault point and the second target fault point can be either any circuit line close to the same electrical component or the same electrical component.

[0091] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method of detecting a failure point of a brake force detection system, characterized by: include: Receive false alarms from the braking force detection system; Determine whether the braking force testing conditions are met; If the braking force detection conditions are met, the first detection points marked in the first circuit of the braking force detection system are sequentially detected to obtain the gain and loss of power status of each first detection point after detection; the first detection point includes at least one of the following: the first detection point is a circuit line between two adjacent electrical components in the first circuit, or a circuit line close to a certain electrical component; the first circuit includes an electrical component for detecting braking force; The first target fault point is determined from the first fault point set based on the power gain / loss status of each first detection point after the detection. If the braking force detection conditions are not met, the second detection points marked in the second circuit are detected sequentially to obtain the gain and loss states of each second detection point after detection; the second detection point includes at least one of the following: the second detection point is a circuit line between two adjacent electrical components in the second circuit, or a circuit line close to a certain electrical component; the second circuit does not contain an electrical component for detecting braking force; The second target fault point is determined from the set of second fault points based on the power gain / loss status of each second detection point after the detection. The fault point set includes the mapping relationship between each fault point and at least one detection point for the standard gain and loss of power.

2. The method of claim 1, wherein, The first set of fault points includes the mapping relationship between each first fault point and at least one first detection point for the standard gain and loss of power. The step of determining the first target fault point from the first fault point set based on the power gain / loss status of each first detection point after detection includes: Based on the power gain and loss status of each first detection point after the detection, a first target fault point is determined from all the first fault points that matches the power gain and loss status of each first detection point after the detection; the standard power gain and loss status of all first detection points corresponding to the first target fault point is the same as the power gain and loss status of each first detection point after the detection.

3. The method of claim 1, wherein, The second fault point set includes a mapping relationship between each second fault point and at least one second detection point for the standard gain / loss state. Based on the gain / loss state of each second detection point after detection, a second target fault point is determined from the second fault point set, including: Based on the power gain and loss status of each second detection point after the detection, a second target fault point is determined from the second fault points that matches the power gain and loss status of each second detection point after the detection; the standard power gain and loss status of all second detection points corresponding to the second target fault point is the same as the power gain and loss status of each second detection point after the detection.

4. The method of claim 3, wherein, include: The first target fault point and the second target fault point are either any circuit line close to the same electrical component or the same electrical component.

5. A device for detecting fault points in a braking force detection system, characterized in that, include: The receiving module is used to receive false alarms from the braking force detection system; The judgment module is used to determine whether the braking force detection conditions are met; The first detection module includes a first detection unit and a second detection unit. The first detection unit is used to sequentially detect the first detection points marked in the first circuit of the braking force detection system if the braking force detection conditions are met, and obtain the gain and loss state of each first detection point after detection; the first detection point includes at least one of the following: the first detection point is a circuit line between two adjacent electrical components in the first circuit, or a circuit line close to a certain electrical component; the first circuit includes an electrical component for detecting braking force. The first determining module is used to determine the first target fault point from the first fault point set based on the power gain and loss status of each first detection point after detection; The second detection unit is used to sequentially detect the second detection points marked in the second circuit if the braking force detection conditions are not met, and obtain the gain and loss state of each second detection point after detection; the second detection point includes at least one of the following: the second detection point is a circuit line between two adjacent electrical components in the second circuit, or a circuit line close to a certain electrical component; The second circuit does not contain any electrical components for detecting braking force; The second determining unit is used to determine the second target fault point from the second fault point set based on the power gain and loss status of each second detection point after detection. The fault point set includes the mapping relationship between each fault point and at least one detection point for the standard gain and loss of power.

6. The device for detecting a failure point of a brake force detection system according to claim 5, characterized by The first set of fault points includes the mapping relationship between each first fault point and at least one first detection point for the standard gain and loss of power. The first determining module includes: The first determining unit is configured to determine a first target fault point from all the first fault points that matches the power gain and loss status of the first detection points after the detection, based on the power gain and loss status of each first detection point after the detection; the standard power gain and loss status of all the first detection points corresponding to the first target fault point is the same as the power gain and loss status of each first detection point after the detection.

7. The device for detecting a failure point of a brake force detection system according to claim 5, characterized by The second fault point set includes a mapping relationship between each second fault point and at least one second detection point for the standard gain / loss state. The second determining unit further includes: The third determining unit is used to determine a second target fault point from the second fault points that matches the power gain and loss status of the second detection points after the detection, based on the power gain and loss status of each second detection point after the detection; the standard power gain and loss status of all second detection points corresponding to the second target fault point is the same as the power gain and loss status of each second detection point after the detection.

8. The device for detecting a failure point of a brake force detection system according to claim 7, characterized by include: The first target fault point and the second target fault point are either any circuit line close to the same electrical component or the same electrical component.

Images