CN112147545A - System and method for detecting cable joint and vehicle - Google Patents

System and method for detecting cable joint and vehicle Download PDF

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Publication number
CN112147545A
CN112147545A CN201910503201.6A CN201910503201A CN112147545A CN 112147545 A CN112147545 A CN 112147545A CN 201910503201 A CN201910503201 A CN 201910503201A CN 112147545 A CN112147545 A CN 112147545A
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China
Prior art keywords
cable joint
characteristic parameter
temperature
parameter information
current
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Chinese (zh)
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谢迪
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Beiqi Foton Motor Co Ltd
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Beiqi Foton Motor Co Ltd
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Priority to CN201910503201.6A priority Critical patent/CN112147545A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/0207—Wire harnesses
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

The present disclosure relates to a system and method for detecting a cable joint, a vehicle, to solve the problem of not being timely enough to detect the safety of the cable joint. The disclosed system includes: the system comprises a processor, a data acquisition module connected with the processor, wherein the data acquisition module comprises a first temperature sensor; the data acquisition module is used for acquiring characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises the conductor temperature of the cable joint acquired by the first temperature sensor; and the processor is used for generating state information for representing the state of the cable joint according to the characteristic parameter information of the cable joint. This openly can detect cable joint's conductor temperature to in time detect cable joint's security.

Description

System and method for detecting cable joint and vehicle
Technical Field
The present disclosure relates to the field of automotive engineering, and in particular, to a system and method for detecting a cable joint, and a vehicle.
Background
New energy automobiles have gained rapid development in recent years, but a lot of potential safety hazards are exposed, and many safety accidents occur. The problems of the existing new energy automobiles are caused in part by corrosion and aging of electronic components caused by climate and working conditions. Particularly, under the condition of changing environment, moisture, temperature, chemical substances and harmful gases have great influence on the working conditions of electronic components, and are a major factor inducing the safety accidents of vehicles.
According to analysis, one of the reasons for safety accidents of new energy automobiles is poor contact of high-voltage cable connectors, which is caused by looseness of the connectors of the cables due to dynamic vibration and impact during running of the vehicles to a certain extent. The new energy automobile has the characteristics of high voltage and large current, a high-voltage system with the voltage of more than 300V is usually equipped, the working current can reach more than 200A, and the looseness of connectors of cables can endanger the use safety and the personal safety of high-voltage parts.
Disclosure of Invention
The present disclosure is directed to a system and a method for detecting a cable joint, and a vehicle, for solving the problem of the related art that the safety of detecting the cable joint is not timely enough.
To achieve the above object, a first aspect of the present disclosure provides a system for detecting a cable joint, the system comprising: the system comprises a processor, a data acquisition module connected with the processor, wherein the data acquisition module comprises a first temperature sensor; the data acquisition module is used for acquiring characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises the conductor temperature of the cable joint acquired by the first temperature sensor; and the processor is used for generating state information for representing the state of the cable joint according to the characteristic parameter information of the cable joint.
Optionally, the data acquisition module further comprises a current sensor; the data acquisition module is used for acquiring characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises the current which is acquired by the current sensor and flows through the cable joint.
Optionally, the data acquisition module further comprises a second temperature sensor; the data acquisition module is used for acquiring characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises the environmental temperature of the environment where the cable joint is located, acquired by the second temperature sensor.
Optionally, the state information comprises first state information for characterizing poor contact of the cable joint; the processor is configured to: and when the conductor temperature is greater than a first temperature threshold value, the current is less than a second current threshold value, and the environment temperature is less than a third temperature threshold value, generating the first state information.
Optionally, the feature parameter information includes one or more feature parameters; the processor is configured to: for each of the characteristic parameters, performing the following operations: determining the membership degree corresponding to the characteristic parameter according to the value of the characteristic parameter and a preset membership function corresponding to the characteristic parameter; determining a target fuzzy set affiliated to the characteristic parameters according to the membership degree; determining a target fuzzy set combination consistent with the obtained target fuzzy set in a plurality of preset fuzzy set combinations; and generating state information for representing the cable joint state according to the target fuzzy set combination and the corresponding relation between the target fuzzy set combination and the preset cable joint state.
According to a second aspect of the present disclosure, there is provided a method for detecting a cable joint, the cable joint being provided with a first temperature sensor; the method comprises the following steps: collecting characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises conductor temperature of the cable joint collected by the first temperature sensor; and generating state information for representing the state of the cable joint according to the characteristic parameter information of the cable joint.
Optionally, the cable joint is provided with a current sensor; the method further comprises the following steps: collecting characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises the current collected by the current sensor and flowing through the cable joint.
Optionally, the cable joint is provided with a second temperature sensor; the method further comprises the following steps: and collecting characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises the environmental temperature of the environment where the cable joint is located, collected by the second temperature sensor.
Optionally, the feature parameter information includes one or more feature parameters; the method further comprises the following steps: for each of the characteristic parameters, performing the following operations: determining the membership degree corresponding to the characteristic parameter according to the value of the characteristic parameter and a preset membership function corresponding to the characteristic parameter; determining a target fuzzy set affiliated to the characteristic parameters according to the membership degree; determining a target fuzzy set combination consistent with the obtained target fuzzy set in a plurality of preset fuzzy set combinations; and generating state information for representing the cable joint state according to the target fuzzy set combination and the corresponding relation between the target fuzzy set combination and the preset cable joint state.
According to a third aspect of the present disclosure, there is provided a vehicle comprising any one of the systems for detecting a cable joint provided by the present disclosure.
The technical scheme can at least achieve the following technical effects:
and generating state information for representing the state of the cable joint according to the conductor temperature characteristic parameter information of the cable joint by acquiring the conductor temperature characteristic parameter information of the cable joint. Therefore, the working state of the cable joint can be determined according to the conductor temperature of the cable joint, the state information used for representing the state of the cable joint is generated, and the safety of the cable joint can be detected in time because the operation of detecting the cable joint is real-time.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a block diagram for detecting a cable joint provided according to one embodiment of the present disclosure.
Fig. 2 is a block diagram for detecting a cable joint provided according to one embodiment of the present disclosure.
Fig. 3 is a block diagram for detecting a cable joint provided according to one embodiment of the present disclosure.
Fig. 4 is a flow chart of a method for detecting a cable joint provided according to one embodiment of the present disclosure.
Fig. 5 is a flow chart of a method for detecting a cable joint provided according to one embodiment of the present disclosure.
Fig. 6 is a flow chart of a method for detecting a cable joint provided according to one embodiment of the present disclosure.
Fig. 7 is a flow chart of a method for detecting a cable joint provided according to one embodiment of the present disclosure.
Fig. 8 is a flow chart of a method for detecting a cable joint provided according to one embodiment of the present disclosure.
FIG. 9 is a graph of membership functions for currents provided according to one embodiment of the present disclosure.
FIG. 10 is a graph of membership functions for conductor temperature provided in accordance with one embodiment of the present disclosure.
FIG. 11 is a graph of membership functions for ambient temperature provided in accordance with one embodiment of the present disclosure.
Reference numerals
Processor 101 data acquisition module 102 first temperature sensor 1021
Current sensor 1022 second temperature sensor 1023
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a block diagram for detecting a cable joint provided according to one embodiment of the present disclosure. As shown in fig. 1, the system 100 may include the following components:
the system comprises a processor 101 and a data acquisition module 102 connected with the processor 101, wherein the data acquisition module 102 comprises a first temperature sensor 1021.
The first temperature sensor 1021 is used for collecting the conductor temperature of the cable joint.
Optionally, a thermal resistor and a thermocouple may be used as the first temperature sensor 1021 to collect the temperature of the cable joint conductor. The difference lies in that the thermal resistance needs power excitation, and the thermocouple does not need power excitation, and the thermocouple still has measurement accuracy height, measurable temperature range is big, stability advantage such as good, consequently, the first temperature sensor 1021 who gathers cable joint conductor temperature parameter information can select the thermocouple.
The data acquisition module 102 is configured to acquire characteristic parameter information of the cable joint, where the characteristic parameter information includes a conductor temperature of the cable joint acquired by the first temperature sensor 1021.
Optionally, the characteristic parameter information acquired by the data acquisition module 102 is subjected to code conversion, frequency conversion, or the like to obtain digital quantity type characteristic parameter information. When the characteristic parameter information is digital, the data acquisition module 102 may transmit the characteristic parameter information to the processor 101.
Optionally, the characteristic parameter information acquired by the data acquisition module 102 is subjected to voltage conversion and the like to obtain analog characteristic parameter information. When the characteristic parameter information is analog, the data acquisition module 102 has an a/D conversion function. After the data acquisition module 102 performs the a/D conversion operation, the characteristic parameter information is transmitted to the processor 101.
The processor 101 is configured to generate state information for characterizing a state of the cable connector according to the characteristic parameter information of the cable connector.
The cable joint is overheated, which may be caused by overlarge current of the cable joint or poor contact of the cable joint; generating state information for representing the state of the cable joint, wherein the state information can be the state information for representing poor contact of the cable joint, and reminding a user to check whether the cable joint is in poor contact; or the cable joint can be used for reminding a user of reducing the number of the electric appliances by using the large current flowing state information.
Optionally, the status information for characterizing the poor contact of the cable joint may be sent through a hard wire or may be sent through a CAN communication protocol.
The CAN communication has the outstanding advantages of low failure rate, simple maintenance, convenient communication and the like, and the processor 101 sends the state information of the poor contact of the cable joint, which CAN be sent to other equipment through the CAN communication protocol.
Optionally, generating status information for characterizing poor contact of the cable joint may perform any of the following operations: sending prompt information of state information for representing the state of the cable joint through a meter of the vehicle; and sending a state information report to the Internet of vehicles platform through the telematics T-BOX of the vehicle.
The technical scheme can at least achieve the following technical effects:
the method comprises the steps of acquiring conductor temperature characteristic parameter information of a cable joint, and generating state information for representing the state of the cable joint according to the conductor temperature characteristic parameter information of the cable joint. Therefore, the working state of the cable joint can be determined according to the conductor temperature of the cable joint, the state information for representing the state of the cable joint is generated, the operation of detecting the cable joint is real-time, the safety of the cable joint can be detected timely, the working state of the cable joint can be informed to a user timely, and the safety of a vehicle is improved. And a fault report is sent to the Internet of vehicles platform, so that the monitoring of the remote control platform on the vehicle is facilitated, and the vehicle state data can be obtained in time.
Fig. 2 is a block diagram for detecting a cable joint provided according to one embodiment of the present disclosure. As shown in fig. 2, the system 200 may include the following components:
the device comprises a processor 101 and a data acquisition module 102 connected with the processor 101, wherein the data acquisition module 102 comprises a first temperature sensor 1021 and a current sensor 1022.
The first temperature sensor 1021 is used for collecting the conductor temperature of the cable joint.
Optionally, a thermal resistor and a thermocouple may be used as the first temperature sensor 1021 to collect the temperature of the cable joint conductor. The difference lies in that the thermal resistor needs power excitation, and the thermocouple does not need power excitation, and the thermocouple still has measurement accuracy height, measurable temperature range is big, stability advantage such as good, consequently, the first temperature sensor 1021 who gathers cable joint conductor temperature parameter information can select the thermocouple.
The current sensor 1022 is used for collecting the current flowing through the cable joint.
Optionally, the current sensor 1022 may be disposed at a cable connector, and may also be disposed at an electrical appliance corresponding to the cable connector.
The data acquisition module 102 is configured to acquire characteristic parameter information of the cable joint; the characteristic parameter information includes a conductor temperature of the cable joint collected by the first temperature sensor 1021 and a current flowing through the cable joint collected by the current sensor 1022.
Optionally, the characteristic parameter information acquired by the data acquisition module 102 is subjected to code conversion, frequency conversion, or the like to obtain digital quantity type characteristic parameter information. When the characteristic parameter information is digital, the data acquisition module 102 may directly transmit the characteristic parameter information to the processor 101.
Optionally, the characteristic parameter information acquired by the data acquisition module 102 is subjected to voltage conversion and the like to obtain analog characteristic parameter information. When the characteristic parameter information is analog, the data acquisition module 102 has an a/D conversion function. After the data acquisition module 102 performs the a/D conversion operation, the characteristic parameter information is transmitted to the processor 101.
The processor 101 is configured to generate state information for characterizing a state of the cable connector according to the characteristic parameter information of the cable connector.
Optionally, the range of values of the conductor temperature and the current in the characteristic parameter information may have the following combination: the temperature and the current of the cable joint conductor are normal; the temperature of the cable joint conductor is overhigh and the current is normal; the temperature of the cable joint conductor is normal and the current is overlarge; the temperature of the cable joint conductor is too high and the current is too large.
It is understood that the cable joint conductor is over-temperature and normal in current, which may be caused by poor contact of the cable joint, and state information representing the poor contact of the cable joint is generated to remind a user to check whether the cable joint is in poor contact.
The temperature of the cable joint conductor is normal, the current is too high, the temperature of the cable joint conductor can be caused to be too high, and state information representing that the current flowing through the cable joint is large is generated to remind a user that the current is too high, the cable joint can be caused to be overheated, the user is reminded to pay attention, and the number of used electric appliances is reduced.
The cable joint conductor is over-high in temperature and over-high in current, and state information representing that the current flowing through the cable joint is over-high and causes the cable joint to be overheated is generated, so that a user can be reminded of paying attention to the state information, and the number of used electric appliances is reduced.
Optionally, generating status information for characterizing poor contact of the cable joint may perform any of the following operations: sending prompt information of state information for representing the state of the cable joint through a meter of the vehicle; and sending a state information report to the Internet of vehicles platform through the telematics T-BOX of the vehicle.
And generating state information for representing the state of the cable joint according to the conductor temperature characteristic parameter information and the current characteristic parameter information of the cable joint by acquiring the conductor temperature characteristic parameter information and the current characteristic parameter information of the cable joint. Therefore, the working state of the cable joint can be determined according to the conductor temperature and the current of the cable joint, the state information used for representing the state of the cable joint is generated, the operation of detecting the cable joint is real-time, the safety of the cable joint can be detected timely, the working state of the cable joint can be informed to a user timely, and the safety of a vehicle is improved. And a fault report is sent to the Internet of vehicles platform, so that the monitoring of the remote control platform on the vehicle is facilitated, and the vehicle state data can be obtained in time.
Fig. 3 is a block diagram for detecting a cable joint provided according to one embodiment of the present disclosure. As shown in fig. 3, the system 300 may include the following components:
the device comprises a processor 101, and a data acquisition module 102 connected to the processor 101, wherein the data acquisition module 102 comprises a first temperature sensor 1021, a current sensor 1022 and a second temperature sensor 1023.
The first temperature sensor 1021 is used for collecting the conductor temperature of the cable joint.
Optionally, a thermal resistor and a thermocouple may be used as the first temperature sensor 1021 to collect the temperature of the cable joint conductor. The difference lies in that the thermal resistor needs power excitation, and the thermocouple does not need power excitation, and the thermocouple still has measurement accuracy height, measurable temperature range is big, stability advantage such as good, consequently, the first temperature sensor 1021 who gathers cable joint conductor temperature parameter information can select the thermocouple.
The current sensor 1022 is used for collecting the current flowing through the cable joint.
Optionally, the current sensor 1022 may be disposed at a cable connector, and may also be disposed at an electrical appliance corresponding to the cable connector.
The second temperature sensor 1023 is used for collecting the ambient temperature of the environment where the cable joint is located.
Optionally, one second temperature sensor 1023 may be disposed in a plurality of cable connectors under the same operating condition, but each cable connector is respectively disposed with the first temperature sensor 1021 and the current sensor 1022, so that on one hand, the number of sensors may be reduced, and the use cost of the sensors may be reduced, and on the other hand, the reliability of the characteristic parameter information may be improved by comparing the conductor temperature and the current characteristic parameter information of a plurality of cable connectors under the same operating condition.
For example, the cable connections of the electromagnetic management system BMS to the motor are in the same condition, and a second temperature sensor may be provided near the plurality of cable connections for collecting the ambient temperature. And at U, V, W three wires, 6 corresponding cable joints are respectively provided with a first temperature sensor and a current sensor at each position for collecting the conductor temperature and the current of each cable joint. Therefore, on one hand, the number of the sensors can be reduced, the use cost of the sensors can be reduced, and on the other hand, the reliability of the characteristic parameter information can be improved by comparing the conductor temperature characteristic parameter information and the current characteristic parameter information of the U, V, W cable joint under the same working condition.
The data acquisition module 102 is configured to acquire characteristic parameter information of the cable joint; the characteristic parameter information includes the conductor temperature of the cable joint collected by the first temperature sensor 1021, the current flowing through the cable joint collected by the current sensor 1022, and the ambient temperature of the environment in which the cable joint is located collected by the second temperature sensor 1023.
Optionally, the data acquisition module 102 has a function of processing the characteristic parameter information in a grouping set. The characteristic parameter information of the cable joint needs to be acquired by the corresponding current sensor, the first temperature sensor and the second temperature sensor. The vehicle has a plurality of cable connectors, and the data acquisition module 102 needs to group and concentrate the corresponding characteristic parameter information of each cable connector for the processor 101 to process.
It should be noted that the characteristic parameter information is preprocessed by the data acquisition module 102 and converted into digital signals and packet sets, which need to be transmitted to the processor 101. In the transmission process, the anti-interference performance of transmission is considered, and a serial communication protocol can be selected.
The RS-485 serial port communication protocol has good anti-jamming capability, and the data acquisition module 102 and the processor 101 are provided with the RS-485 serial port communication protocol for transmitting the characteristic parameter information of the cable joint so as to improve the accuracy of the characteristic parameter information.
The processor 101 is configured to generate state information for characterizing a state of the cable connector according to the characteristic parameter information of the cable connector.
And generating state information for representing the state of the cable joint according to the conductor temperature characteristic parameter information, the current characteristic parameter information and the environment temperature characteristic parameter information of the cable joint by acquiring the conductor temperature characteristic parameter information, the current characteristic parameter information and the environment temperature characteristic parameter information of the cable joint. Therefore, the working state of the cable joint can be determined according to the conductor temperature, the current and the environment temperature of the cable joint, and the state information for representing the state of the cable joint is generated.
In one manner that may be implemented,
the state information comprises first state information used for characterizing poor contact of the cable joint;
the processor 101 is configured to:
and when the conductor temperature is greater than a first temperature threshold value, the current is less than a second current threshold value, and the environment temperature is less than a third temperature threshold value, generating the first state information.
Optionally, the processor 101 determines, according to the received cable joint characteristic parameter information, state information of the cable joint state: whether the conductor temperature is greater than a first temperature threshold, whether the current exceeds a second current threshold, and whether the ambient temperature is greater than a third temperature threshold.
When the cable joint conductor temperature is greater than a first temperature threshold, the current flowing through the cable joint does not exceed a second current threshold, and the ambient temperature is not greater than a third temperature threshold, the processor 101 generates first state information characterizing poor contact of the cable joint.
Further, generating the state information for characterizing the poor contact of the cable joint may perform any of the following operations: sending prompt information of state information for representing the state of the cable joint through a meter of the vehicle; and sending a state information report to the Internet of vehicles platform through the telematics T-BOX of the vehicle.
When the conductor temperature is greater than a first temperature threshold value, the current is less than a second current threshold value, and the environment temperature is less than a third temperature threshold value, the cable joint is determined to be in poor contact, first state information representing the cable joint is generated, the working state of the cable joint is informed to a user, and the safety of a vehicle is improved. And a fault report is sent to the Internet of vehicles platform, so that the monitoring of the remote control platform on the vehicle is facilitated, and the vehicle state data can be obtained in time.
The characteristic parameter information includes one or more characteristic parameters, and the processor 101 is further configured to:
for each of the characteristic parameters, performing the following operations: determining the membership degree corresponding to the characteristic parameter according to the value of the characteristic parameter and a preset membership function corresponding to the characteristic parameter; and determining a target fuzzy set affiliated to the characteristic parameters according to the membership degree.
Specifically, when the characteristic parameter information includes a characteristic parameter, determining a membership degree of the conductor temperature characteristic parameter according to a conductor temperature value of the cable connector and a preset membership degree function corresponding to the conductor temperature characteristic parameter; and determining a conductor temperature fuzzy set affiliated to the conductor temperature characteristic parameters according to the conductor temperature membership degree.
Specifically, when the characteristic parameter information comprises two characteristic parameters, determining the membership degree of the conductor temperature characteristic parameter according to the conductor temperature value of the cable joint and a preset membership degree function corresponding to the conductor temperature characteristic parameter; determining a conductor temperature fuzzy set affiliated to the conductor temperature characteristic parameter according to the conductor temperature membership degree; determining the membership degree of the current characteristic parameter according to the current value of the cable joint and a preset membership function corresponding to the current characteristic parameter; and determining a current fuzzy set which is subject to the current characteristic parameters according to the current membership.
Specifically, when the characteristic parameter information includes three characteristic parameters, determining the membership of the conductor temperature characteristic parameter according to the conductor temperature value of the cable connector and a preset membership function corresponding to the conductor temperature characteristic parameter; determining a conductor temperature fuzzy set affiliated to the conductor temperature characteristic parameter according to the conductor temperature membership degree; determining the membership degree of the current characteristic parameter according to the current value of the cable joint and a preset membership function corresponding to the current characteristic parameter; determining a current fuzzy set which is subject to the current characteristic parameters according to the current membership degree; determining the membership degree of the environmental temperature characteristic parameter according to the cable joint environmental temperature value and a preset membership function corresponding to the environmental temperature characteristic parameter; and determining an ambient temperature fuzzy set affiliated to the ambient temperature characteristic parameters according to the ambient temperature membership degree.
The processor 101 is further configured to:
and determining a target fuzzy set combination consistent with the obtained target fuzzy set in a plurality of preset fuzzy set combinations.
Optionally, when the feature parameter information includes a feature parameter, the target fuzzy set may be: the cable joint conductor temperature is too high and the cable joint conductor temperature is normal.
Further, according to the conductor temperature fuzzy set, determining the target fuzzy set combination may be:
the temperature of the cable joint conductor is normal, and the temperature of the cable joint conductor is overhigh.
Optionally, when the feature parameter information includes two feature parameters, the target fuzzy set may be: the temperature of the cable joint conductor is too high and normal, and the current flowing through the cable joint is too high and the current flowing through the cable joint is normal.
Further, according to the conductor temperature fuzzy set and the current fuzzy set, the target fuzzy set combination may be:
the current flowing through the cable joint is normal, and the temperature of the conductor of the cable joint is normal;
the current flowing through the cable joint is too large, and the temperature of the conductor of the cable joint is too high;
the current flowing through the cable joint is normal, and the temperature of the conductor of the cable joint is overhigh;
the current flowing through the cable joint is too high and the temperature of the conductor of the cable joint is too high.
Optionally, when the feature parameter information includes three feature parameters, the target fuzzy set may be: the temperature of the cable joint conductor is overhigh and normal, the current flowing through the cable joint is overhigh and normal, and the environment temperature of the cable joint is overhigh and normal.
Further, according to the conductor temperature fuzzy set, the current fuzzy set and the environment temperature fuzzy set, the target fuzzy set combination may be:
the current flowing through the cable joint is normal, the ambient temperature is normal, and the temperature of the cable joint conductor is normal;
the current flowing through the cable joint is too large, the environment temperature is too high, and the temperature of a conductor of the cable joint is too high;
the current flowing through the cable joint is overlarge, the ambient temperature is normal, and the temperature of the conductor of the cable joint is overhigh;
the current flowing through the cable joint is overlarge, and the temperature of the conductor of the cable joint is normal;
the current flowing through the cable joint is normal, the ambient temperature is overhigh, and the temperature of the conductor of the cable joint is overhigh;
the current flowing through the cable joint is normal, the ambient temperature is normal, and the temperature of the conductor of the cable joint is overhigh;
the current flowing through the cable joint is normal, the ambient temperature is too high, and the temperature of the cable joint conductor is normal.
The processor 101 is further configured to:
and generating state information for representing the cable joint state according to the target fuzzy set combination and the corresponding relation between the target fuzzy set combination and the preset cable joint state.
For example, the cable joint status may be: the cable joint normally works, the cable joint is overheated, and the cable joint is poor in contact.
For example, when the characteristic parameter information includes a characteristic parameter, the cable joint status may be: the cable joint normally works and the cable joint is overheated.
The corresponding relationship between the target fuzzy set combination and the preset cable joint state may be:
and the temperature of the cable joint conductor is normal, and state information representing normal work of the cable joint is generated.
And generating state information representing the overheating of the cable joint when the temperature of the cable joint conductor is overhigh.
For example, when the characteristic parameter information includes two characteristic parameters, the cable joint status may be: the cable joint normally works, the cable joint is overheated, the cable joint is in poor contact, and the cable joint current is too big.
The corresponding relationship between the target fuzzy set combination and the preset cable joint state may be:
the current flowing through the cable joint is normal, the temperature of the conductor of the cable joint is normal, and state information representing the normal work of the cable joint is generated;
the current flowing through the cable joint is overlarge, the temperature of a conductor of the cable joint is overhigh, and state information representing the cable joint overheating is generated;
the current flowing through the cable joint is normal, the temperature of a conductor of the cable joint is overhigh, and state information representing poor contact of the cable joint is generated;
and the current flowing through the cable joint is overlarge, the temperature of the conductor of the cable joint is normal, and state information representing the large current flowing through the cable joint is generated.
For example, when the characteristic parameter information includes three characteristic parameters, the cable joint status may be: the cable joint normally works, the cable joint is overheated, the cable joint is in poor contact, and the cable joint current is too big.
And the current flowing through the cable joint is normal, the ambient temperature is normal, the conductor temperature of the cable joint is normal, and state information representing the normal work of the cable joint is generated.
And generating state information representing the overheating of the cable joint due to the fact that the current flowing through the cable joint is overlarge, the environment temperature is overhigh and the conductor temperature of the cable joint is overhigh.
And the current flowing through the cable joint is overlarge, the ambient temperature is normal, and the temperature of the conductor of the cable joint is overlarge, so that state information representing the cable joint overheating is generated.
And generating state information representing the large current flowing through the cable joint, wherein the current flowing through the cable joint is overlarge, the environment temperature is normal, and the conductor temperature of the cable joint is normal.
And generating state information representing the cable joint overheating when the current flowing through the cable joint is normal, the environment temperature is overhigh and the conductor temperature of the cable joint is overhigh.
And the current flowing through the cable joint is normal, the ambient temperature is normal, and the temperature of the conductor of the cable joint is overhigh, so that the state information representing the poor contact of the cable joint is generated.
And the current flowing through the cable joint is normal, the ambient temperature is overhigh, and the conductor temperature of the cable joint is normal, so that the state information representing the normal work of the cable joint is generated.
Optionally, corresponding identification information is preset in the sensor corresponding to each cable connector, and if the state information representing the state of the cable connector generated by the target sensor is fault state information representing poor contact or excessive current of the cable connector, the position of the fault cable connector is determined according to the identification information corresponding to the target sensor. Therefore, the poor contact of the cable joint corresponding to the identification information can be determined, so that a user can quickly and accurately find the poor contact cable joint.
Illustratively, the battery pack D + cable connector is identified as # 1 cable connector, the corresponding first temperature sensor is identified as # 1 first temperature sensor, the current sensor is identified as # 1 current sensor, and the second temperature sensor is identified as # 1 second temperature sensor.
The data acquisition module 102 acquires the conductor temperature parameter information, and records the conductor temperature parameter information as # 1 conductor temperature parameter information, the current parameter information as # 1 current parameter information, and the environment temperature parameter information as # 1 environment temperature parameter information.
Further, if the battery pack D + cable joint has a poor contact state, according to the characteristic parameter information of the cable joint, the processor 101 obtains the information that the 1# cable joint has the poor contact, the processor 101 sends the state information representing the 1# cable joint poor contact, the instrument of the vehicle sends prompt information used for representing the state information representing the poor contact of the cable joint, and a user can directly check whether the battery pack D + cable joint has the poor contact according to the prompt information. And the processor 101 sends a bad contact status information report to the internet of vehicles platform through the vehicle's telematics processor T-BOX.
Therefore, when the cable joint is loosened, a user can timely know the information of poor contact of the cable joint and timely eliminate the hidden danger of loosening of the cable joint. In addition, the method for identifying the cable connectors and the corresponding sensors enables users to quickly find out the cable connectors which are loosened, so that workload of one-to-one investigation is reduced, and time for processing problems is saved. Furthermore, a fault report is sent to the Internet of vehicles platform, so that the monitoring of the remote control platform on the vehicles is facilitated, and the vehicle state data can be obtained in time.
With regard to the system in the above embodiment, the specific manner in which each module performs the operation will be described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 4 is a flow chart of a method for detecting a cable joint provided according to one embodiment of the present disclosure.
The method is applied to a vehicle, wherein the vehicle is provided with a first temperature sensor which can be arranged on a cable joint and is used for collecting the conductor temperature of the cable joint; specifically, the main body executing the method may be a vehicle control unit VCU, a body controller BCM, or an electromagnetic management system BMS of the vehicle. The method may also be applied to a processor in a system for detecting cable joints as shown in fig. 1.
The method comprises the following steps:
s410, collecting characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises the conductor temperature of the cable joint collected by the first temperature sensor.
In an optional implementation manner, the cable joint parameter information is effectively received for the first time, timing is started, if the preset time is exceeded and the cable joint parameter information is not effectively received for the second time, it is determined that the line of the sensor and/or the sensor has a fault, and error information is reported to remind a user to confirm whether the line of the cable joint sensor and/or the sensor is in a perfect function.
Illustratively, the preset time is 2min, the current parameter information of the battery pack D + cable connector is effectively received for the first time, timing is started, if the preset time is 2min, the current parameter information of the battery pack D + cable connector is not effectively received for the second time, it is determined that the line of the battery pack D + cable connector current sensor and/or the current sensor is faulty, error information is reported to remind a user to confirm whether the line of the battery pack D + cable connector current sensor and/or the current sensor is/are in a perfect function.
And S420, generating state information for representing the state of the cable joint according to the characteristic parameter information of the cable joint.
For example, the processor may generate state information for characterizing the cable joint state based on conductor temperature characteristic parameter information of the cable joint. The state information of the cable joint conductor temperature may be: the cable joint is overheated and the cable joint normally works.
Fig. 5 is a flow chart of a method for detecting a cable joint provided according to one embodiment of the present disclosure.
The method is applied to a vehicle, the vehicle is provided with a first temperature sensor for collecting the conductor temperature of the cable joint, and the first temperature sensor can be arranged on the cable joint; the vehicle is also provided with a current sensor for collecting the current flowing through the cable joint, and the current sensor can be arranged in a cable joint circuit or an electrical appliance corresponding to the cable joint; specifically, the main body executing the method may be a vehicle control unit VCU, a body controller BCM, or an electromagnetic management system BMS of the vehicle. The method may also be applied to a processor in a system for detecting cable joints as shown in fig. 2.
The method comprises the following steps:
and S510, collecting characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises the conductor temperature of the cable joint collected by the first temperature sensor and the current flowing through the cable joint collected by the current sensor.
It is worth mentioning that the conductor temperature characteristic parameter information and the current characteristic parameter information are collected and grouped. Illustratively, the battery pack D + cable joint conductor temperature characteristic parameter information and the current characteristic parameter information are gathered and grouped together; the temperature characteristic parameter information and the current characteristic parameter information of the D-cable connector conductor of the battery pack are gathered and grouped together.
And S520, generating state information for representing the state of the cable joint according to the characteristic parameter information of the cable joint.
For example, the processor may generate state information for characterizing the cable joint state based on conductor temperature characteristic parameter information and current characteristic parameter information of the cable joint. The state information of the cable joint state may be: the cable joint normally works, the cable joint is poor in contact, the cable joint is overheated and the cable joint has overlarge current.
Fig. 6 is a flow chart of a method for detecting a cable joint provided according to one embodiment of the present disclosure.
The method is applied to a vehicle, the vehicle comprises a first temperature sensor and a second temperature sensor, the first temperature sensor is used for collecting the conductor temperature of the cable joint, and the first temperature sensor can be arranged on the cable joint; the vehicle also comprises a current sensor for collecting the current flowing through the cable joint, wherein the current sensor can be arranged in a cable joint circuit or an electrical appliance corresponding to the cable joint; the vehicle further comprises a second temperature sensor, wherein the second temperature sensor is used for acquiring the environment temperature of the environment where the cable joints are located, one second temperature sensor can be arranged near each cable joint, and one second temperature sensor can be arranged on the cable joints under the same working conditions; specifically, the main body executing the method may be a vehicle control unit VCU, a body controller BCM, or an electromagnetic management system BMS of the vehicle. The method may also be applied to a processor in a system for detecting cable joints as shown in fig. 3.
The method comprises the following steps:
s610, collecting characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises conductor temperature of the cable joint collected by the first temperature sensor, current flowing through the cable joint collected by the current sensor and environment temperature of the environment where the cable joint is located collected by the second temperature sensor.
It is worth to be noted that the conductor temperature characteristic parameter information, the current characteristic parameter information and the environment temperature characteristic parameter information are collected and grouped. Illustratively, the battery pack D + cable joint conductor temperature characteristic parameter information, the current characteristic parameter information and the environment temperature characteristic parameter information are gathered and grouped together; the battery pack D-cable joint conductor temperature characteristic parameter information, the current characteristic parameter information and the environment temperature characteristic parameter information are gathered and grouped together.
S620, generating state information for representing the state of the cable joint according to the characteristic parameter information of the cable joint.
For example, the processor may generate state information characterizing the state of the cable joint based on conductor temperature characteristic parameter information, current characteristic parameter information, and ambient temperature characteristic parameter information of the cable joint. The state information of the cable joint state may be: the cable joint normally works, the cable joint is poor in contact, the cable joint is overheated and the cable joint has overlarge current.
Fig. 7 is a flow chart of a method for detecting a cable joint provided according to one embodiment of the present disclosure.
And S710, collecting characteristic parameter information of the cable joint.
The characteristic parameter information includes a conductor temperature of the cable joint collected by the first temperature sensor, a current flowing through the cable joint collected by the current sensor, and an ambient temperature of an environment in which the cable joint is located collected by the second temperature sensor.
It can be understood that the vehicle has a plurality of cable connectors, the number of the arranged sensors is large, and the current characteristic parameter information, the conductor temperature characteristic parameter information and the environment temperature characteristic parameter information of the corresponding sensors of the cable connectors need to be grouped and concentrated to prevent the confusion of the sensor characteristic parameter information.
S720, determining the membership degree corresponding to the characteristic parameter according to the value of the characteristic parameter and a preset membership function corresponding to the characteristic parameter.
Specifically, the processor determines the membership degree of the conductor temperature characteristic parameter according to the cable joint conductor temperature value and a preset membership degree function corresponding to the conductor temperature characteristic parameter.
Specifically, the processor determines the membership degree of the current characteristic parameter according to the current value of the cable joint and a preset membership function corresponding to the current characteristic parameter.
Specifically, the processor determines the membership degree of the ambient temperature characteristic parameter according to the value of the ambient temperature of the cable joint and a preset membership function corresponding to the ambient temperature characteristic parameter.
And S730, determining a target fuzzy set affiliated to the characteristic parameters according to the membership degree.
Specifically, the processor determines a conductor temperature fuzzy set affiliated with the conductor temperature characteristic parameter according to the conductor temperature membership degree.
Specifically, the processor determines a current fuzzy set affiliated with the current characteristic parameter according to the current membership degree.
Specifically, the processor determines an ambient temperature fuzzy set affiliated with the ambient temperature characteristic parameter according to the ambient temperature membership degree.
And S740, determining a target fuzzy set combination consistent with the obtained target fuzzy set in a plurality of preset fuzzy set combinations.
Specifically, the preset fuzzy set combinations are fuzzy set combinations of a conductor temperature fuzzy set, a current fuzzy set and an environment temperature fuzzy set which are preset in the processor.
Specifically, the target fuzzy set is a fuzzy set combination of the conductor temperature fuzzy set, the current fuzzy set and the environment temperature fuzzy set in S730.
And S750, generating state information for representing the cable joint state according to the target fuzzy set combination and the corresponding relation between the target fuzzy set combination and the preset cable joint state.
Specifically, state information representing the cable joint state is generated according to the target fuzzy set combination and the corresponding relation between the target fuzzy set combination and a preset cable joint state. The state information of the cable joint state may be: the cable joint normally works, the cable joint is poor in contact, the cable joint is overheated and the cable joint has overlarge current.
Fig. 8 is a flow chart of a method for detecting a cable joint provided according to one embodiment of the present disclosure.
And S810, collecting characteristic parameter information of the cable joint.
In specific implementation, the characteristic parameter information includes the conductor temperature of the cable joint collected by the first temperature sensor, the current flowing through the cable joint collected by the current sensor, and the environmental temperature of the environment where the cable joint is located collected by the second temperature sensor.
And S820, preprocessing the characteristic parameter information of the cable joint.
The characteristic parameter information of the cable joint comprises current adjustment parameter information acquired by a current sensor, temperature characteristic parameter information acquired by a first temperature sensor and environment temperature characteristic parameter information acquired by a second temperature sensor.
Optionally, the preprocessing of the characteristic parameter information of the cable joint includes that the acquired characteristic parameter information is subjected to code conversion, frequency conversion or other operations to obtain digital quantity type characteristic parameter information.
Optionally, the preprocessing of the characteristic parameter information of the cable joint further includes that the acquired characteristic parameter information is subjected to voltage conversion and other operations to obtain analog quantity type characteristic parameter information. Further, the analog quantity type characteristic parameter information is subjected to A/D conversion operation to obtain digital quantity type characteristic parameter information.
And S830, collecting characteristic parameter information of the cable joint.
It can be understood that the vehicle has a plurality of cable connectors, the number of the arranged sensors is large, and the current characteristic parameter information, the conductor temperature characteristic parameter information and the environment temperature characteristic parameter information of the corresponding sensors of the cable connectors need to be grouped and concentrated to prevent the confusion of the sensor characteristic parameter information.
And S840, transmitting cable joint characteristic parameter information, wherein the characteristic parameter information comprises the current characteristic parameter information, the conductor temperature characteristic parameter information and the environment temperature characteristic parameter information.
For example, the transmission cable joint characteristic parameter information can use an RS-485 serial port communication protocol.
In another alternative embodiment:
the processor is provided in a vehicle controller VCU, a body controller BCM, or an electromagnetic management system BMS.
Specifically, the transmission of the cable joint characteristic parameter information may perform the following operations:
and the processor judges whether the conductor temperature is greater than a first temperature threshold value, whether the current exceeds a second current threshold value and whether the environment temperature is greater than a third temperature threshold value according to the received characteristic parameter information of the cable joint.
And if the conductor temperature is greater than a first temperature threshold value, the current is less than a second current threshold value, the environment temperature is less than a third temperature threshold value, and the processor generates state information for representing poor contact of the cable joint.
Optionally, generating status information for characterizing poor contact of the cable joint may perform any of the following operations: sending prompt information of state information for representing the state of the cable joint through a meter of the vehicle; and sending a state information report to the Internet of vehicles platform through the telematics T-BOX of the vehicle.
The processor is arranged on a VCU (vehicle control unit), and if the cable joint is in a poor contact state, the processor generates state information for representing the poor contact state of the cable joint and sends the state information of the poor contact state of the cable joint to the instrument and the T-BOX (remote information processing unit).
And S850, determining the membership degree corresponding to the characteristic parameter according to the value of the characteristic parameter and a preset membership function corresponding to the characteristic parameter.
As shown in fig. 9, a (Ix) is a membership function of the current, a (Ix) is called a membership of Ix to a, a horizontal axis represents a value Ix of a characteristic parameter of the current of the cable joint, and a vertical axis represents a membership a (Ix) of the current parameter after the normalization method.
It should be noted that, as shown in fig. 9, if more than one degree of membership occurs in the degree of membership function corresponding to the characteristic parameter, the degree of membership corresponding to the characteristic parameter may be determined in a "positive large" manner. Exemplarily, when the current characteristic parameter is taken at a point P, two membership degrees appear in the corresponding membership degree function, where a (P) is 0.6 and a (P) is 0.4, and when the value of the characteristic parameter is taken at the point P, the membership degree is determined to be a (P) is 0.6 in a positive and large manner.
As shown in fig. 10, B (T1x) is a membership function of the conductor temperature, and B (T1x) is referred to as a membership of T1x to B, the horizontal axis represents the value T1x of the characteristic parameter of the conductor temperature of the cable joint, and the vertical axis represents the membership of the conductor temperature parameter after the "normalization method" (T1 x).
It should be noted that, as shown in fig. 10, if more than one degree of membership occurs in the degree of membership function corresponding to the characteristic parameter, the degree of membership corresponding to the characteristic parameter may be determined in a "positive large" manner. Illustratively, when the value of the characteristic parameter of the conductor temperature is at a point Q, two membership degrees appear corresponding to the membership degree function, where b (Q) is 0.6 and b (Q) is 0.4, and when the value of the characteristic parameter is determined to be at the point Q, the membership degree is b (Q) is 0.6 by adopting a positive and large mode.
As shown in fig. 11, C (T2x) is called the membership of T2x to C, the horizontal axis represents the value T2x of the characteristic parameter of the cable joint ambient temperature, and the vertical axis represents the membership of the ambient temperature C (T2x) after the "normalization method".
It should be noted that, as shown in fig. 11, if more than one degree of membership occurs in the degree of membership function corresponding to the characteristic parameter, the degree of membership corresponding to the characteristic parameter may be determined in a "positive large" manner. Illustratively, when the value of the characteristic parameter of the ambient temperature is at the point R, two degrees of membership appear in the corresponding degree of membership function, where c (R) is 0.6 and c (R) is 0.4, and when the value of the characteristic parameter is at the point R, the degree of membership is determined to be c (R) is 0.6 by adopting a positive and large mode.
And S860, determining a target fuzzy set affiliated to the characteristic parameters according to the membership degree.
The membership function is divided on the domain of discourse according to the sequence from big to small or from small to big, and the domain of discourse interval in which the characteristic parameter is positioned is a fuzzy set of membership.
As shown in fig. 9, the characteristic parameter is the current, and the membership function corresponding to the current parameter is divided into a first current interval, a second current interval and a third current interval on the domain of the current according to the order of the current from large to small; if the current is in a first current interval, belonging to a first current fuzzy set A1; if the current is in a second current interval, belonging to a second current fuzzy set A2; if the current is in the third current interval, the current belongs to a third current fuzzy set A3.
As shown in fig. 10, the characteristic parameter is the conductor temperature, and the membership function corresponding to the conductor temperature parameter is divided into a first conductor temperature interval, a second conductor temperature interval and a third conductor temperature interval in the temperature from high to low on the discourse domain of the conductor temperature; if the conductor temperature is in a first conductor temperature interval, the conductor temperature belongs to a first conductor temperature fuzzy set B1; if the conductor temperature is in a second conductor temperature interval, the conductor temperature belongs to a second conductor temperature fuzzy set B2; and if the conductor temperature is in a third conductor temperature interval, the conductor temperature belongs to a third conductor temperature fuzzy set B3.
As shown in fig. 11, the characteristic parameter is the ambient temperature, and the membership function corresponding to the ambient temperature parameter is divided into a first ambient temperature interval, a second ambient temperature interval and a third ambient temperature interval in the discourse domain of the ambient temperature according to the order of the temperature from high to low; if the ambient temperature is in the first ambient temperature interval, the temperature belongs to a first ambient temperature fuzzy set C1; if the ambient temperature is in the second ambient temperature interval, the temperature sensor belongs to a second ambient temperature fuzzy set C2; if the ambient temperature is in the third ambient temperature interval, the fuzzy set C3 belongs to the third ambient temperature.
S870 is a target fuzzy set combination matching the plurality of target fuzzy sets determined among the plurality of preset fuzzy set combinations.
Optionally, the preset fuzzy set combination may be:
the cable joint temperature is normal (J1);
overheating of the cable joint due to excessive current and high ambient temperature (J2);
overheating the cable joint due to excessive current (J3);
overheating of the cable joint (J4) due to excessive current;
overheating of the cable joint due to excessive ambient temperature (J5);
no excessive current and excessive ambient temperature, but overheating of the cable joint (J6);
the ambient temperature is too high, and the cable joint temperature is normal (J7).
In the preset fuzzy set combinations, the target fuzzy set combination consistent with the determined target fuzzy sets can express causal judgment through the following relational statements:
If(A2 OR A3)and(B2 OR B3)and(C2 OR C3)then J1；
If A1 and B1 and C1 then J2；
If A1 and B1 and(C2 OR C3)then J3；
If A1 and B2 then J4；
If(A2 OR A3)and B1 and C1 then J5；
If A3 and B1 and(C2 OR C3)then J6；
If(A2 ORA3)and(B2 OR B3)and C1 then J7。
that is to say that the position of the first electrode,
if the current characteristic parameter of the cable joint is subordinate to A2 or A3, the conductor temperature characteristic parameter is subordinate to B2 or B3, and the environment temperature characteristic parameter is subordinate to C2 or C3, determining that the cable joint has normal temperature and no excessive current (J1);
if the current characteristic parameter of the cable joint is subordinate to A1, the conductor temperature characteristic parameter is subordinate to B1, and the environment temperature characteristic parameter is subordinate to C1, determining that the cable joint causes overheating of the cable joint due to excessive current and excessive environment temperature (J2);
if the current characteristic parameter of the cable joint is subordinate to A1, the conductor temperature characteristic parameter is subordinate to B1, and the environment temperature characteristic parameter is subordinate to C2 or C3, determining that the cable joint causes overheating of the cable joint due to excessive current (J3);
if the current characteristic parameter of the cable joint is subordinate to A1 and the conductor temperature characteristic parameter is subordinate to B2, determining that the cable joint causes overheating of the cable joint due to excessive current (J4);
if the current characteristic parameter of the cable joint is subordinate to A2 or A3, the conductor temperature characteristic parameter is subordinate to B1, and the environment temperature characteristic parameter is subordinate to C1, determining that the cable joint causes overheating of the cable joint due to overhigh environment temperature (J5);
if the current characteristic parameter of the cable joint is subordinate to A3, the conductor temperature characteristic parameter is subordinate to B1, and the environment temperature characteristic parameter is subordinate to C2 or C3, determining that the cable joint has no excessive current and excessive environment temperature, but the cable joint is overheated (J6);
and if the current characteristic parameter of the cable joint belongs to A2 or A3, the conductor temperature characteristic parameter belongs to B2 or B3, and the environment temperature characteristic parameter belongs to C1, determining that the environment temperature of the cable joint is too high, and the temperature of the cable joint is normal (J7).
And S880, generating state information for representing the cable joint state according to the target fuzzy set combination and the corresponding relation between the target fuzzy set combination and the preset cable joint state.
Alternatively, the status information of the cable joint may be: the cable joint normally works, the cable joint is overheated, and the cable joint is poor in contact.
It is worth mentioning that the cable joint is working normally, that the cable joint is at normal temperature (J1, J4 or J7);
the cable joint is overheated, which may be caused by excessive current and/or excessive ambient temperature. That is, the cable joint conductor temperature is high, which may be due to excessive current and excessive ambient temperature, causing the cable joint to overheat (J2); or: overheating the cable joint due to excessive current (J3); or: overheating of the cable joint due to excessive ambient temperature (J5);
the poor contact of the cable joint is caused by the loosening of the cable joint, namely, the cable joint does not have excessive current and high ambient temperature, but the cable joint is overheated (J6).
It should be noted that, for simplicity of description, the above-mentioned method embodiments are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
The embodiment of the disclosure also provides a vehicle comprising the system for detecting the cable joint.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (10)

1. A system for detecting cable splices, the system comprising:
a processor (101), a data acquisition module (102) connected to the processor (101), the data acquisition module (102) comprising a first temperature sensor (1021);
the data acquisition module (102) is used for acquiring characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises the conductor temperature of the cable joint acquired by the first temperature sensor (1021);
the processor (101) is used for generating state information for representing the state of the cable joint according to the characteristic parameter information of the cable joint.
2. The system of claim 1, wherein the data acquisition module (102) further comprises a current sensor (1022);
the data acquisition module (102) is used for acquiring characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises the current collected by the current sensor (1022) and flowing through the cable joint.
3. The system of claim 2, wherein the data acquisition module (102) further comprises a second temperature sensor (1023);
the data acquisition module (102) is used for acquiring characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises the environmental temperature of the environment where the cable joint is located, acquired by the second temperature sensor (1023).
4. The system of claim 3, wherein the status information includes first status information characterizing poor contact of the cable joint;
the processor (101) is configured to:
and when the conductor temperature is greater than a first temperature threshold value, the current is less than a second current threshold value, and the environment temperature is less than a third temperature threshold value, generating the first state information.
5. The system according to any one of claims 1-4, wherein the characteristic parameter information comprises one or more characteristic parameters; the processor (101) is configured to:
for each of the characteristic parameters, performing the following operations:
determining the membership degree corresponding to the characteristic parameter according to the value of the characteristic parameter and a preset membership function corresponding to the characteristic parameter;
determining a target fuzzy set affiliated to the characteristic parameters according to the membership degree;
determining a target fuzzy set combination consistent with the obtained target fuzzy set in a plurality of preset fuzzy set combinations;
and generating state information for representing the cable joint state according to the target fuzzy set combination and the corresponding relation between the target fuzzy set combination and the preset cable joint state.
6. A method for testing a cable joint, characterized in that the cable joint is provided with a first temperature sensor;
the method comprises the following steps:
collecting characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises conductor temperature of the cable joint collected by the first temperature sensor;
and generating state information for representing the state of the cable joint according to the characteristic parameter information of the cable joint.
7. The method of claim 6, wherein the cable joint is provided with a current sensor;
the method further comprises the following steps:
collecting characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises the current collected by the current sensor and flowing through the cable joint.
8. The method of claim 7, wherein the cable joint is provided with a second temperature sensor;
the method further comprises the following steps:
and collecting characteristic parameter information of the cable joint, wherein the characteristic parameter information comprises the environmental temperature of the environment where the cable joint is located, collected by the second temperature sensor.
9. The method according to any one of claims 6-8, wherein the characteristic parameter information comprises one or more characteristic parameters;
the method further comprises the following steps:
for each of the characteristic parameters, performing the following operations:
determining the membership degree corresponding to the characteristic parameter according to the value of the characteristic parameter and a preset membership function corresponding to the characteristic parameter;
determining a target fuzzy set affiliated to the characteristic parameters according to the membership degree;
determining a target fuzzy set combination consistent with the obtained target fuzzy set in a plurality of preset fuzzy set combinations;
and generating state information for representing the cable joint state according to the target fuzzy set combination and the corresponding relation between the target fuzzy set combination and the preset cable joint state.
10. A vehicle, characterized in that it comprises a system for detecting cable joints according to any one of claims 1 to 5.
CN201910503201.6A 2019-06-11 2019-06-11 System and method for detecting cable joint and vehicle Pending CN112147545A (en)

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