CN107764424A - A kind of cable intermediate joint temperature rise on-Line Monitor Device and method based on temperature difference method - Google Patents
A kind of cable intermediate joint temperature rise on-Line Monitor Device and method based on temperature difference method Download PDFInfo
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- CN107764424A CN107764424A CN201710834391.0A CN201710834391A CN107764424A CN 107764424 A CN107764424 A CN 107764424A CN 201710834391 A CN201710834391 A CN 201710834391A CN 107764424 A CN107764424 A CN 107764424A
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- 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
- G01K7/22—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 the element being a non-linear resistance, e.g. thermistor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
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Abstract
The present invention relates to a kind of cable intermediate joint temperature rise on-Line Monitor Device and its method.Mainly solve in the prior art using the method for Traditional Man inspection cable connector has human and material resources, financial resources waste and monitoring reliability is low, poor real, the problem of being difficult to timely discovering device potential safety hazard, device includes temperature sensing module, microprocessor, power circuit, newly carry out screening by the temperature to detection simultaneously and ambient temperature value carries out mathematic interpolation, judge whether temperature rise is abnormal.The present invention can accurately obtain temperature of cable junction, and it is monitored in real time, it is ensured that cable health and safety are run.
Description
Technical field
The present invention relates to field of electrical equipment, more particularly to a kind of cable intermediate joint temperature rise on-Line Monitor Device and its
Method.
Background technology
Power equipment causes because production quality, installation quality, run time, usage frequency and working environment etc. influence
Installation place contact is unreliable, and temperature rise exceeds the allowed band of national regulation so that cable terminal insulation aging, or even puncture
The serious consequences such as damage.The temperature of intermediate joint of electric cable is to reflect the important parameter of its running status.Cause cable connector
Temperature rise immediate cause is joint long operational time, crimp head be not tight, contact resistance is excessive etc..Caused by joint longtime running
Phenomena such as overheat, burn-through insulation, easily triggers fire, so as to cause serious accident and economic loss.
Cable connector is superheated to accident, and its development speed is slow, the time is longer, using the method for Traditional Man inspection
Reliability is low, poor real, it is difficult to timely discovering device potential safety hazard.Therefore, how temperature of cable junction is effectively carried out
Automatic be monitored and controlled has important practical significance.
In power system, because the factors such as cable connector contact resistance is excessive, overload cause connector temperature too high, make
Obtain joint insulation variation or burning collapses burst accident and causes fire, serious potential safety hazard is brought to industrial production, is even resulted in
The major accident that equipment forced outage, short time can not resume production, the reliability of electric power netting safe running is reduced, causes great warp
Ji loss.
Cable connector is the most weak link of power cable, and the more long easier generation of run time overheats burn-through accident.Connect
Head temperature is to weigh the important indicator that whether state of insulation is good in cable connector operation, and its temperature change is in normal operation
Under be due to that electric current passes through caused by inner conductor.When cable is run in normal duty, the temperature inside joint is about 90
℃；When cable oepration at full load, connector temperature can be up to 250 DEG C or so；When temperature raises again, the oxide-film of joint adds
Thickness, contact resistance increase therewith, and in the presence of certain conduction time, it is nonisulated thing that the dielectric of joint, which decomposes carbonization,
Cause failure.Therefore, the temperature of cable connector core is accurately understood, whether normal operation has weight to monitoring cable connector
Want meaning.A kind of cable intermediate joint temperature rise on-Line Monitor Device and its method based on temperature difference method are proposed for this present invention,
The device solves measurement apparatus criterion by environment by monitoring the difference of cable intermediate joint temperature and environment temperature in real time
Temperature influences problem.
The content of the invention
Present invention mainly solves in the prior art use Traditional Man inspection cable connector method exist human and material resources,
Financial resources waste and monitoring reliability is low, poor real, it is difficult to timely discovering device potential safety hazard, there is provided one kind is based on temperature difference
The cable intermediate joint temperature rise on-Line Monitor Device and its method of method, can accurately obtain temperature of cable junction, and reality is carried out to it
When monitor, it is ensured that cable health and safety run.
The above-mentioned technical problem of the present invention is mainly what is be addressed by following technical proposals：Electricity based on temperature difference method
Cable transition joint temperature rise on-Line Monitor Device, including：Temperature sensing module, microprocessor, power circuit, temperature sensing module are defeated
Go out end to be connected with the I/O mouths of microcontroller circuit, power circuit is connected with microcontroller circuit.
Temperature sensing module, including the temperature sensor of multiple measurement temperature of cable junction and an environment temperature sensing
Device, multiple temperature sensors are uniformly arranged on cable shaft cable intermediate joint, each temperature sensor is consolidated using insulation material
It is scheduled at cable intermediate joint electric field stress concentration and intermediate connections；Environment temperature sensor, cable well environment is monitored in real time
Temperature.
Microprocessor, Screening Treatment is carried out to the temperature of cable junction value surveyed in temperature sensing module, obtained accurate
Temperature value, average value processing is carried out to garbled temperature value, the temperature that the temperature value after average value processing and environmental sensor are measured
Angle value carries out difference processing, obtains cable connector temperature rise value by compared with temperature alarm threshold value, judging whether to alarm；When
When cable connector temperature rise value is more than temperature alarm threshold value, microprocessor sends alarm signal.
The present invention measures temperature of cable junction and cable shaft environment temperature by temperature sensing module, to temperature sensing module
Middle surveyed temperature of cable junction value carries out Screening Treatment, obtains accurate temperature value, and average is carried out to garbled temperature value
Processing, the temperature value that the temperature value after average value processing and environmental sensor are measured carry out difference processing, obtain cable connector temperature
Appreciate by compared with temperature alarm threshold value, judging whether to alarm；When cable connector temperature rise value is more than temperature alarm threshold value
When, microprocessor sends alarm signal and notifies staff to computer, and addressing circuit determines failure cable joint location, right
It is rushed to repair in time, and function is monitored on-line to the temperature rise of cable shaft cable connector to realize.
As a kind of preferred scheme, temperature sensor is made up of thermistor and oscillating circuit.Temperature sensor is by temperature
Signal is converted into frequency signal output, temperature value is corresponded with frequency values, is exported using frequency signal, and it is diamagnetic to improve device
Field and electric jamming ability.
As a kind of preferred scheme, the device also connects including Smoke Sensor, level sensor, attitude transducer, communication
Mouth, display circuit, key circuit, addressing circuit, power circuit.
Attitude transducer uses three-axis gyroscope, can be with tri- direction situation of movement of detection cable well X, Y, Z.
Smoke Sensor uses ion smoke alarm, and the sensing to small smoke particle is very sensitive, to various cigarettes
Can equalizer response.
Level sensor uses float type water level sensor, and equipment is most ripe, suitable for the water level monitoring of cable shaft.
Display circuit, show the related data in microprocessor.
Key circuit, temperature alarm threshold value and temperature difference threshold are set in the microprocessor
Communication interface, when temperature rise value is more than set alert thresholds, microprocessor sends warning letter by communication interface to computer
Number notify staff.
Addressing circuit, failure cable joint location can be quick and precisely positioned, be easy in time to failure cable joint
Rushed to repair, realized to cable shaft cable connector temperature rise on-line monitoring function.
Power circuit, power circuit is powered using CT or solar powered or battery powered or 20VAC power supplies, or they
Combine and the cable intermediate joint temperature rise on-Line Monitor Device of temperature difference method is powered, it is ensured that the stability of power supply power supply.
A kind of cable intermediate joint temperature rise on-line monitoring method based on temperature difference method, comprises the following steps：
S1. microcomputer reads No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors and environment temperature
The temperature value that degree sensor measures；
S2. the temperature value measured to No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors sieves
Choosing is handled, and is rejected because of the inaccurate temperature value measured by temperature sensor fault；
S3. the average of the temperature value by screening is calculated；
S4. the difference of temperature value average and environment temperature sensor measured temperature value is calculated, obtains cable intermediate joint temperature rise value；
S5. when temperature rise value is more than set alert thresholds, microprocessor sends alarm signal to computer by communication interface and notified
Staff.
S6. addressing circuit determines failure cable joint location occur, is rushed to repair in time, realizes to cable shaft electricity
Function is monitored in cable joint temperature rise on-line.
The present invention to surveyed temperature of cable junction by being screened, average value processing, and ensure that will not be because of some survey electricity
The temperature sensor fault of cable joint and cause entirely cable intermediate joint temperature rise on-Line Monitor Device based on temperature difference method therefore
Barrier, it is ensured that the stability of device, while an environment temperature sensor is added, calculate temperature value average and passed with environment temperature
The difference of sensor measured temperature value, cable intermediate joint temperature rise value is obtained, exclude environment temperature and cable intermediate joint temperature rise is existed
The influence of line monitoring.When temperature rise value is more than set alert thresholds, microprocessor sends warning letter by communication interface to computer
Staff number is notified, addressing circuit determines failure cable joint location occur, rushed to repair, realized to cable shaft in time
Function is monitored in cable connector temperature rise on-line.
Carrying out Screening Treatment to temperature as a kind of preferred scheme, in S2 includes following processing procedure：
S21. No.1 point temperature sensor measured temperature value and No. two point temperature sensors, No. three point TEMPs are first calculated respectively
Device measures the difference of temperature value, when 2 differences both greater than set temperature difference threshold, gives up No.1 point temperature sensor measured temperature
Value, on the contrary enter next step average value processing；
S22. No. two point temperature sensor measured temperature values are calculated respectively again to pass with No.1 point temperature sensor, No. three point temperature
Sensor measures the difference of temperature value, when 2 differences both greater than set temperature difference threshold, gives up No. two point temperature sensor institute thermometrics
Angle value, on the contrary enter next step average value processing；
S23. it is last to calculate No. three point temperature sensor measured temperature values and No.1 point temperature sensor, No. two point temperature respectively
Sensor measures the difference of temperature value, when 2 differences both greater than set temperature difference threshold, gives up No. three point temperature sensors and is surveyed
Temperature value, on the contrary enter next step average value processing.
Therefore, it is an advantage of the invention that：Provide a kind of cable intermediate joint temperature rise on-line monitoring based on temperature difference method
Devices and methods therefor, pass through the temperature surveyed to No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors
Angle value carries out Screening Treatment, obtains accurate temperature value, average value processing is carried out to garbled temperature value, after average value processing
The temperature value that measures of temperature value and environmental sensor carry out difference processing, accurate temperature of cable junction value, phase can be measured
Than in saving substantial amounts of human and material resources and financial resources by the way of artificial.Compare in general temperature measurement system for cable joint simultaneously
Add the detection to cable shaft environment temperature and system is measured temperature value screened, average, difference processing, improve temperature
The accuracy of detection is spent, is realized to cable shaft cable connector temperature rise on-line monitoring function.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of the temperature of cable junction sensor installation of present system device；
Accompanying drawing 2 is the concentration measurement module structure chart of present system device；
Accompanying drawing 3 is the structure flow chart of present system method.
1-No.1 point temperature sensor, 2-No. two point temperature sensors, 3-No. three point 4-cables of temperature sensor
Transition joint 5-temperature sensing module, 6-environment temperature sensor, 7-key circuit, 8-power circuit, 9-microprocessor
10-Smoke Sensor of device, 11-level sensor 12,13-computer of communication interface, 14-attitude transducer 15 shows electricity
16-addressing circuit of road.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Embodiment：
The present embodiment is a kind of temperature rise on-Line Monitor Device of cable intermediate joint 4 based on temperature difference method, as shown in Fig. 2 this hair
The concentration measurement module structure chart of bright system and device includes temperature sensing module, key circuit 7, microcontroller circuit 9, power supply electricity
Road 8, Smoke Sensor 10, level sensor 11, attitude transducer 14, communication interface 12, display circuit 15, addressing circuit
16th, computer 13；Wherein temperature sensing module includes the point temperature of point temperature sensor 2, three of No.1 point temperature sensor 1, two
Sensor 3, environment temperature sensor 6, No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors, rings
The output end of border temperature sensor is connected with the I/O mouths of microcontroller circuit respectively；The output end and microprocessor of key circuit
The I/O mouths connection of circuit；The output end of power circuit and the power end of microcontroller circuit connect；The output end of Smoke Sensor
It is connected with the I/O mouths of microcontroller circuit；The output end of level sensor and the A/D ports of microcontroller circuit connect；Posture
The output end of sensor and the digital mouth of microcontroller circuit connect；The input of display circuit and the I/O of microcontroller circuit
Mouth connection；The output end of addressing circuit and the I/O mouths of microcontroller circuit connect；The input and microprocessor of communication interface
The port connection of device circuit.
As shown in figure 1, the point temperature sensor 3 of point temperature sensor 2, three of No.1 point temperature sensor 1, two is uniformly pacified
On cable shaft cable intermediate joint, each temperature sensor is fixed on cable intermediate joint electric field stress collection using insulation material
Middle place and intermediate connections.
Temperature sensor is made up of thermistor and oscillating circuit, the temperature of cable junction signal that temperature sensor will measure
Be converted into frequency signal output, correspond temperature value and frequency values, exported using frequency signal, improve the diamagnetic field of device and
Electric jamming ability.
Power circuit, power circuit is powered using CT or solar powered or battery powered or 20VAC power supplies, or they
Combine and the cable intermediate joint temperature rise on-Line Monitor Device of temperature difference method is powered, it is ensured that the stability of power supply power supply.
Attitude transducer uses three-axis gyroscope, can be prevented artificial with tri- direction situation of movement of detection cable well X, Y, Z
Removal cable manhole cover plate..
Smoke Sensor uses ion smoke alarm, and the sensing to small smoke particle is very sensitive, to various cigarettes
Energy equalizer response, when failure triggers fire at cable connector, ion smoke alarm can in time detect and send signal
To microprocessor, fire information is sent to computer by microprocessor by communication interface with wireless signal, can be in time to failure
Handled, improve security and reduce loss..
Level sensor uses float type water level sensor, and equipment is most ripe, suitable for the water level monitoring of cable shaft, according to
Actual conditions set watermark threshold, and level sensor transfers information to microprocessor after water level reaches threshold value, and microprocessor leads to
Cross communication interface and will send information to computer, drainage sunk well can be carried out to cable shaft in advance..
Display circuit, show the related data in microprocessor.
Key circuit, temperature alarm threshold value and temperature difference threshold are set in the microprocessor
Communication interface, when temperature rise value is more than set alert thresholds, microprocessor sends warning letter by communication interface to computer
Number notify staff.
Addressing circuit, failure cable joint location can be quick and precisely positioned, be easy in time to failure cable joint
Rushed to repair, realized to cable shaft cable connector temperature rise on-line monitoring function.
A kind of cable intermediate joint temperature rise on-line monitoring method based on temperature difference method：
Idiographic flow is as shown in Figure 3：
A kind of cable intermediate joint temperature rise on-line monitoring method based on temperature difference method, comprises the following steps：
S1. microcomputer reads No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors and environment temperature
The temperature value that degree sensor measures；
S2. the temperature value measured to No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors sieves
Choosing is handled, and is rejected because of the inaccurate temperature value measured by temperature sensor fault；
S3. the average of the temperature value by screening is calculated；
S4. the difference of temperature value average and environment temperature sensor measured temperature value is calculated, obtains cable intermediate joint temperature rise value；
S5. when temperature rise value is more than set alert thresholds, microprocessor sends alarm signal to computer by communication interface and notified
Staff.
S6. addressing circuit determines failure cable joint location occur, is rushed to repair in time, realizes to cable shaft electricity
Function is monitored in cable joint temperature rise on-line.
Wherein, carrying out Screening Treatment to temperature in S2 includes following processing procedure：
S21. No.1 point temperature sensor measured temperature value and No. two point temperature sensors, No. three point TEMPs are first calculated respectively
Device measures the difference of temperature value, when 2 differences both greater than set temperature difference threshold, gives up No.1 point temperature sensor measured temperature
Value, on the contrary enter next step average value processing；
S22. No. two point temperature sensor measured temperature values are calculated respectively again to pass with No.1 point temperature sensor, No. three point temperature
Sensor measures the difference of temperature value, when 2 differences both greater than set temperature difference threshold, gives up No. two point temperature sensor institute thermometrics
Angle value, on the contrary enter next step average value processing；
S23. it is last to calculate No. three point temperature sensor measured temperature values and No.1 point temperature sensor, No. two point temperature respectively
Sensor measures the difference of temperature value, when 2 differences both greater than set temperature difference threshold, gives up No. three point temperature sensors and is surveyed
Temperature value, on the contrary enter next step average value processing.
The present invention to surveyed temperature of cable junction by being screened, average value processing, and ensure that will not be because of some survey electricity
The temperature sensor fault of cable joint and cause entirely cable intermediate joint temperature rise on-Line Monitor Device based on temperature difference method therefore
Barrier, it is ensured that the stability of device, while an environment temperature sensor is added, calculate temperature value average and passed with environment temperature
The difference of sensor measured temperature value, cable intermediate joint temperature rise value is obtained, exclude environment temperature and cable intermediate joint temperature rise is existed
The influence of line monitoring.When temperature rise value is more than set alert thresholds, microprocessor sends warning letter by communication interface to computer
Staff number is notified, addressing circuit determines failure cable joint location occur, rushed to repair, realized to cable shaft in time
Function is monitored in cable connector temperature rise on-line.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Although more having used the terms such as temperature sensing module, communication interface, microprocessor, key circuit herein,
It is not precluded from the possibility using other terms.It is used for the purpose of more easily describing and explaining the present invention's using these terms
Essence；Any additional limitation is construed as all to disagree with spirit of the present invention.
Claims (10)
1. a kind of cable intermediate joint temperature rise on-Line Monitor Device based on temperature difference method, it is characterized in that, including：TEMP mould
The I/O mouths connection of block, microprocessor, temperature sensing module output end and microcontroller circuit；
Temperature sensing module, include the temperature sensor and an environment temperature sensor of multiple measurement temperature of cable junction,
Multiple temperature sensors are uniformly installed on cable shaft cable intermediate joint, monitor cable intermediate joint temperature in real time；Environment temperature
Sensor is spent, monitors cable shaft environment temperature in real time;
Microprocessor, Screening Treatment is carried out to the temperature of cable junction value surveyed in temperature sensing module, obtains accurate temperature
Value, average value processing is carried out to garbled temperature value, the temperature value that the temperature value after average value processing and environmental sensor are measured
Difference processing is carried out, cable connector temperature rise value is obtained, by compared with temperature alarm threshold value, judging whether to alarm；Work as electricity
When cable joint temperature rise value is more than temperature alarm threshold value, microprocessor sends alarm signal.
2. the cable intermediate joint temperature rise on-Line Monitor Device according to claim 1 based on temperature difference method, it is characterized in that,
Temperature sensor is made up of thermistor and oscillating circuit.
3. the cable intermediate joint temperature rise on-Line Monitor Device according to claim 1 based on temperature difference method, it is characterized in that,
Also include level sensor, the A/D ports connection of output end and microcontroller circuit.
4. the cable intermediate joint temperature rise on-Line Monitor Device according to claim 1 based on temperature difference method, it is characterized in that,
Also include power circuit, power circuit is connected with microcontroller circuit.
5. the cable intermediate joint temperature rise on-Line Monitor Device according to claim 1 based on temperature difference method, it is characterized in that,
Also include key circuit, addressing circuit, Smoke Sensor, the output of key circuit, addressing circuit, Smoke Sensor
End is connected with the I/O mouths of microcontroller circuit respectively.
6. the cable intermediate joint temperature rise on-Line Monitor Device according to claim 1 based on temperature difference method, it is characterized in that,
Also include attitude transducer, the digital mouth connection of attitude transducer output end and microcontroller circuit.
7. the cable intermediate joint temperature rise on-Line Monitor Device according to claim 1 based on temperature difference method, it is characterized in that,
Also include display circuit, display circuit input connects the I/O mouths of microcontroller circuit.
8. the cable intermediate joint temperature rise on-Line Monitor Device according to claim 1 based on temperature difference method, it is characterized in that,
Also include communication interface, the port connection of communication interface input end and microcontroller circuit.
A kind of 9. cable intermediate joint temperature rise on-line monitoring method based on temperature difference method, using in any one of right 1-8
Device, it is characterized in that comprising the following steps：
S1. microcomputer reads No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors and environment temperature
The temperature value that degree sensor measures；
S2. the temperature value measured to No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors sieves
Choosing is handled, and is rejected because of the inaccurate temperature value measured by temperature sensor fault；
S3. the average of the temperature value by screening is calculated；
S4. the difference of temperature value average and environment temperature sensor measured temperature value is calculated, obtains cable intermediate joint temperature rise value；
S5. when temperature rise value is more than set alert thresholds, microprocessor sends alarm signal to computer by communication interface and notified
Staff；
S6. addressing circuit determines failure cable joint location occur.
10. a kind of cable intermediate joint temperature rise on-line monitoring method based on temperature difference method according to claim 9, it is special
Sign is to carry out Screening Treatment to temperature in S2 to include following processing procedure：
S21. No.1 point temperature sensor measured temperature value and No. two point temperature sensors, No. three point TEMPs are first calculated respectively
Device measures the difference of temperature value, when 2 differences both greater than set temperature difference threshold, gives up No.1 point temperature sensor measured temperature
Value, on the contrary enter next step average value processing；
S22. No. two point temperature sensor measured temperature values are calculated respectively again to pass with No.1 point temperature sensor, No. three point temperature
Sensor measures the difference of temperature value, when 2 differences both greater than set temperature difference threshold, gives up No. two point temperature sensor institute thermometrics
Angle value, on the contrary enter next step average value processing；
S23. it is last to calculate No. three point temperature sensor measured temperature values and No.1 point temperature sensor, No. two point temperature respectively
Sensor measures the difference of temperature value, when 2 differences both greater than set temperature difference threshold, gives up No. three point temperature sensors and is surveyed
Temperature value, on the contrary enter next step average value processing.
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| CN108931318A (en) * | 2018-08-01 | 2018-12-04 | 深圳供电局有限公司 | Temperature monitoring system at a kind of power distribution network cable connector |
| CN109375069A (en) * | 2018-09-27 | 2019-02-22 | 河海大学常州校区 | A kind of end insulation characterisitic on-Line Monitor Device and method |
| CN109596886A (en) * | 2018-12-05 | 2019-04-09 | 合肥能安科技有限公司 | A kind of contact resistance on-Line Monitor Device and method |
| CN111722155A (en) * | 2020-06-28 | 2020-09-29 | 上海感拓智能科技有限公司 | Cable joint fault monitoring system and monitoring method |
| CN112147545A (en) * | 2019-06-11 | 2020-12-29 | 北汽福田汽车股份有限公司 | System and method for detecting cable joint and vehicle |
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| CN112304463A (en) * | 2020-10-15 | 2021-02-02 | 国网福建省电力有限公司莆田供电公司 | Temperature difference method-based cable joint temperature rise fault monitoring method and monitoring device |
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