CN110501609A - A kind of electric fault detection system and detection method for cable - Google Patents
A kind of electric fault detection system and detection method for cable Download PDFInfo
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- CN110501609A CN110501609A CN201910723496.8A CN201910723496A CN110501609A CN 110501609 A CN110501609 A CN 110501609A CN 201910723496 A CN201910723496 A CN 201910723496A CN 110501609 A CN110501609 A CN 110501609A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
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Abstract
The invention belongs to electric fault detection technique fields, disclose a kind of electric fault detection system and detection method for cable, acquire cable image data using improved picture pick-up device；Cable temperature data are acquired using temperature sensor；Cable humidity data is acquired using humidity sensor；Utilize diagnostic circuit diagnosing cable fault-signal；Using positioning device according to fault-signal positioning cable abort situation；Cable fault distance is measured using ranging procedure；Timely alert notification is carried out according to acquisition abnormity data using alarm device.The present invention fast and accurately finds fault point by fault location module, saves time and manpower；All consistent by the degree of aging and locating temperature and humidity environment of fault localization module references cable and cable under test, the spread speed of acquisition is more reliable, improves range accuracy.The invention avoids spread speeds caused by random error to seek inaccuracy, to further improve final range accuracy.
Description
Technical field
The invention belongs to electric fault detection technique field more particularly to a kind of electric fault detection systems for cable
And detection method.
Background technique
Cable is usually every group by several or the cable of similar rope that several groups of conducting wires (every group at least two) are twisted
Mutually insulated between conducting wire, and be often twisted into around a center, entire outside is surrounded by the coating of high-insulation.Cable has
Interior energization, the feature of external insulation.Cable has power cable, control cable, compensating cable, shielded cable, high-temperature cable, computer
Cable, signal cable, coaxial cable, fire-resisting cable, cable for ship, mine cable, aluminium alloy cable etc..They are all by list
Stock or stranded conductor and insulating layer composition, for connecting circuit, electric appliance etc..However, being currently used for the electric fault detection of cable
System cannot be sought in time to be measured the accurate location of fault point and excludes power supply recovered from failure, and the great of halt production that have a power failure is often resulted in
Economic loss；Meanwhile it cannot accurately obtain fault distance data.
In conclusion problem of the existing technology is:
The electric fault detection system for being currently used for cable cannot seek accurate location and the exclusion for measuring fault point in time
Power supply recovered from failure often results in the heavy economic losses for having a power failure and stopping production；Meanwhile it cannot accurately obtain fault distance data.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of for the electric fault detection system of cable and inspection
Survey method.
The invention is realized in this way a kind of electric fault detection method for cable, described for the electrical of cable
Fault detection method includes:
Step 1 acquires cable image data using picture pick-up device by cable image capture module.Pass through cable temperature
Acquisition module acquires cable temperature data using temperature sensor.It is acquired by cable humidity collection module using humidity sensor
Cable humidity data.
Step 2, main control module utilize diagnostic circuit diagnosing cable fault-signal by fault diagnosis module.
Fault diagnosis main circuit for realizing switch control relay, then by relay controls light bulb.
Fault Mapping circuit controls 19 relays by main control chip, 19 kinds of failures is projected fault diagnosis master in real time
In circuit.
Display, for realizing fault setting and the display of diagnostic result.
Main control chip, for realizing the control to serial ports screen information exchange and Fault Mapping circuit.
In the circuit of the main control chip:
P1 is power interface, connects 12V, 5V dual power supply.
P2 is debugging serial ports, and even computer serial port carries out debugging or system detection.
P3 is serial ports screen data-interface, connects serial ports screen, provides power supply and data interaction for serial ports screen.
The port VCC provides the power supply of 5V for Fault Mapping circuit.
By fault location module using positioning device according to fault-signal positioning cable abort situation.It specifically includes:
(1) multimeter is configured, by cable shorted on one end, the other end and multimeter are electrically connected, and measure cable with multimeter
Resistance it is whether infinitely great, if resistance value be not it is infinitely great, carry out step (2).If resistance value is infinitely great, cable open circuit, into
Row step (3).
(2) alternate or whether insulation resistance over the ground is greater than 100k Ω with multimeter measurement cable, if more than 100k Ω,
Then cable fault type is high resistive fault；If being less than 100k Ω, cable fault is low resistance faults.
(3) if cable fault is high resistive fault, flashover method bigness scale fault coverage is used, then carry out step (5).
(4) if failure is low resistance faults, with impulse method bigness scale fault coverage, then step (5) are carried out.
(5) fault point is accurately positioned with impacting with high pressure method.
Cable fault distance is measured using ranging procedure by fault localization module.It specifically includes:
(1) one section of cable under test is intercepted as reference cable at detection scene by measuring appliance, measures the reference cable
Length L.
(2) one end of Xiang Suoshu reference cable successively emits N number of reference burst signal, is measured respectively in reference burst signal
Launch point receives reflection signal elapsed time Δ T1, Δ T2... ... Δ TN。
(3) spread speed V of the N number of reference burst signal in the reference cable is calculated according to formulai=2L/
ΔTi, wherein i=1,2 ... ... N.
(4) according to calculated N number of spread speed, average speed V=∑ V is calculatedi/N。
(5) the one detection pulse signal of one end transmitting of Xiang Suoshu cable under test, measurement connect in detection pulse signal launch point
Receive reflection signal elapsed time Δ T.
(6) the distance between the detection pulse signal launch point and fault point D=V Δ T/2 is calculated according to formula.
Step 3 carries out timely alert notification according to acquisition abnormity data using alarm device by alarm modules.
Step 4, cable image, temperature, humidity and the fault-signal acquired by display module using display display,
Position, range data.
Further, the instrument that flashover method described in the step (3) is used includes: tester, the first charging capacitor and
One discharging gap.
The anode of the measurement end of the tester and first charging capacitor is electrically connected, first discharging gap
The positive cathode with first charging capacitor is electrically connected, and one end of cathode and tested cable is electrically connected, and is tested cable
The other end ground connection.
Further, flashover method described in the step (3) the following steps are included:
It charges to the first charging capacitor, after voltage reaches certain numerical value, the electric discharge of the first discharging gap inputs instantaneous high pressure
In cable run.
When the instantaneous pressure is higher than fault point disruptive critical voltage, fault point is breakdown and discharges, and generates to cable
The periodical echo-signal that both ends are propagated.
The test lead of tester captures the echo-signal twice, and records time difference and the echo of twice return signal
Signal cable transmission speed, according to time difference and speed calculate fault point to test lead distance.
Further, step 3 carries out timely alarm according to acquisition abnormity data using alarm device, press alarm manually by
When button, alarm terminal generates alarm request, and alarm request can pass to the main control module of message center, pass through the voice of main control module
Alarm request can be transmitted to corresponding voice terminal of receiving a crime report by mapping mechanism.Meanwhile Alarm Server can monitor always master control mould
The voice communication interface of block, when there is alert, Alarm Server listens to the alarm request of alarm, and Alarm Server is report
Alert request passes to display module, and display module transfers the video information of alarm according to alarm request, and video is launched
Onto video wall.Realize control centre to the remote command of alarm point.
Further, when Alarm Server captures exception information, the picture frame at time point is preserved, is simultaneously emitted by
Alarm request, alarm request can reach the exception information server of message center first, and exception information server is according to video
Alarm request, is passed to the display module of corresponding alarm by the corresponding relationship in source place and alarm area under one's jurisdiction, and display module is received
To after the alarm request of exception information server, responds alarm request and launch abnormal frame picture to alarm display module
On.When the abnormal frame image of dispensing belongs to normal condition, user terminates to alarm by display module.Abnormal frame image belong to it is non-just
When reason condition, user by display module to alarm further responsive to.Display module can transfer alarm ground according to alarm request
Video information, and the video information on alarm ground is shown on the display module.
Further, step 3 is carried out in timely alarm using alarm device according to acquisition abnormity data, and alarm device passes through default
Abnormal data alert program setting alarm device control chip an abnormal data alarm signal working frequency critical value.
Judge that a maximum can handle load capacity according to abnormal data alarm signal working frequency critical value.
Multiple first tasks are combined into one first continuous work task according to platform power administrative skill is collected.
Judge whether a load capacity of the first continuous work task is greater than maximum and can handle load capacity.
Further, when the load capacity of the first continuous work task, which is greater than maximum, to handle load capacity, by the first continuous work
The first task for making one of task overload part removes the first continuous work task.
When receiving the first continuous work task, the control chip of alarm device is switched into an operation by a suspend mode
Mode, and the first continuous work task of processing.After the completion of the processing of the first continuous work task, by the control chip of alarm device
It is set as suspend mode.
The operating frequency of the control chip of alarm device under general operation there is a normal operating frequency and method also to wrap
It includes:
One first operation is determined according to the load capacity of the first continuous work task and abnormal data alarm signal critical value
Frequency.
When the control chip of alarm device switches to operation mode, by the operating frequency of the control chip of alarm device by normal
Operating frequency is promoted to the first operating frequency, and handles the first continuous work task by the first operating frequency.First operation frequency
The working frequency of rate is higher than the working frequency of normal operating frequency.
The control chip alarm method of alarm device further include:
After the processing of the first continuous work task is completed and the control chip of alarm device enters suspend mode, according to collecting
First task of multiple second tasks and part of overloading is combined into one second continuously by platform power administrative skill
Task.
When receiving the second continuous work task, the control chip of alarm device is switched into operation mould by suspend mode
Formula.
The operating frequency of the control chip of alarm device is promoted to one second operating frequency by normal operating frequency, passes through
Two operating frequencies handle the second continuous work task.And after the completion of the processing of the second continuous work task, by the control of alarm device
Coremaking piece is set as suspend mode.The working frequency of first operating frequency is higher than the working frequency of normal operating frequency.
Alarm device control chip using the first operating frequency by the first continuous work task processing complete time point with
Initially receiving had for one first interval time between the time point of the second continuous work task, and used normal frequency by first
The processing of continuous work task, which is completed and received, had for one second interval time between the second continuous work task, wherein between first
Every the time less than the second interval time.
Another object of the present invention is to provide a kind of electric fault detection systems for cable, comprising:
Cable image capture module, connect with main control module, for acquiring cable image data by picture pick-up device.
Cable temperature acquisition module, connect with main control module, for acquiring cable temperature data by temperature sensor.
Cable humidity collection module, connect with main control module, for acquiring cable humidity data by humidity sensor.
Main control module is examined with cable image capture module, cable temperature acquisition module, cable humidity collection module, failure
Disconnected module, fault location module, fault localization module, alarm modules, display module connection, it is each for being controlled by main control chip
A module works normally.
Fault diagnosis module is connect with main control module, for passing through diagnostic circuit diagnosing cable fault-signal.
Fault location module, connect with main control module, for passing through positioning device according to fault-signal positioning cable failure
Position.
Fault localization module, connect with main control module, for measuring cable fault distance by ranging procedure.
Alarm modules are connect with main control module, logical for carrying out timely alarm according to acquisition abnormity data by alarm device
Know.
Display module is connect with main control module, for by display display acquisition cable image, temperature, humidity and
Fault-signal, position, range data.
Another object of the present invention is to provide a kind of information for the electric fault detection method that cable is used for described in realize
Data processing terminal.
Another object of the present invention is to provide a kind of computer readable storage mediums, including instruction, when it is in computer
When upper operation, so that computer executes the electric fault detection method for cable.
Advantages of the present invention and good effect are as follows:
The present invention being capable of accurately diagnosing cable failure；It can fast and accurately be found by fault location module simultaneously
Time and manpower are saved in fault point.Meanwhile by the degree of aging of fault localization module references cable and cable under test, and
Locating temperature and humidity environment is all consistent, and the spread speed of acquisition is more reliable, improves range accuracy.By calculating multiple pulses
The average speed of spread speed of the signal in reference cable is avoided as spread speed of the pulse signal in cable under test
Spread speed caused by random error seeks inaccuracy, to further improve final range accuracy.
The present invention carries out timely alarm according to acquisition abnormity data using alarm device, when pressing alarm hand push button, report
Alert terminal generates alarm request, and alarm request can pass to the main control module of message center, maps machine by the voice of main control module
Alarm request can be transmitted to corresponding voice terminal of receiving a crime report by system.Meanwhile Alarm Server can monitor always the language of main control module
Sound telephony interface, when there is alert, Alarm Server listens to the alarm request of alarm, and Alarm Server is alarm request
Display module is passed to, display module transfers the video information of alarm according to alarm request, and video is launched to video
On wall, realize control centre to the remote command of alarm point.
When Alarm Server captures exception information, the picture frame at time point is preserved, alarm is simultaneously emitted by and asks
It asks, alarm request can reach the exception information server of message center first, and exception information server is according to the source place of video
With the corresponding relationship in alarm area under one's jurisdiction, alarm request is passed to the display module of corresponding alarm, display module receives exception
After the alarm request of information server, responds alarm request and launch abnormal frame picture onto alarm display module.It launches
Abnormal frame image when belonging to normal condition, user terminates to alarm by display module.Abnormal frame image belongs to abnormal condition
When, user by display module to alarm further responsive to.Display module can transfer the video letter on alarm ground according to alarm request
Breath, and the video information on alarm ground is shown on the display module.
Restriction Fault Mapping circuit of the invention controls 19 relays by main control chip, in real time projects 19 kinds of failures
Into fault diagnosis main circuit.In this way convenient for the interaction of the information such as existing fault recognition and progress trouble location.
Detailed description of the invention
Fig. 1 is the electric fault detection system structural block diagram provided in an embodiment of the present invention for cable.
In figure: 1, cable image capture module；2, cable temperature acquisition module；3, cable humidity collection module；4, master control
Module；5, fault diagnosis module；6, fault location module；7, fault localization module；8, alarm modules；9, display module.
Fig. 2 is the electric fault detection method process provided in an embodiment of the present invention for cable.
Fig. 3 is main control chip schematic diagram provided in an embodiment of the present invention.
Fig. 4 is realization " failure " projection schematic diagram provided in an embodiment of the present invention.
Fig. 5 is the partial enlarged view of Fig. 4 provided in an embodiment of the present invention.
Specific embodiment
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, and cooperate attached drawing
Detailed description includes.
The electric fault detection system for being currently used for cable cannot seek accurate location and the exclusion for measuring fault point in time
Power supply recovered from failure often results in the heavy economic losses for having a power failure and stopping production.Meanwhile it cannot accurately obtain fault distance data.
In view of the problems of the existing technology, the present invention provides a kind of for the electric fault detection system of cable and inspection
Survey method, is with reference to the accompanying drawing explained in detail the present invention.
As shown in Figure 1, the electric fault detection system provided in an embodiment of the present invention for cable includes: that cable image is adopted
Collect module 1, cable temperature acquisition module 2, cable humidity collection module 3, main control module 4, fault diagnosis module 5, fault location
Module 6, fault localization module 7, alarm modules 8, display module 9.
Cable image capture module 1 is connect with main control module 4, for acquiring cable image by improved picture pick-up device
Data.
Cable temperature acquisition module 2 is connect with main control module 4, for acquiring cable temperature data by temperature sensor.
Cable humidity collection module 3, connect with main control module 4, for acquiring cable humidity data by humidity sensor.
Main control module 4, with cable image capture module 1, cable temperature acquisition module 2, cable humidity collection module 3, event
Hinder diagnostic module 5, fault location module 6, fault localization module 7, alarm modules 8, display module 9 to connect, for passing through master control
Chip controls modules work normally.
Fault diagnosis module 5 is connect with main control module 4, for passing through the diagnostic circuit diagnosing cable failure based on SSTDR
Signal.
Fault location module 6 is connect with main control module 4, for passing through positioning device according to the event of fault-signal positioning cable
Hinder position.
Fault localization module 7 is connect with main control module 4, for measuring cable fault distance by ranging procedure.
Alarm modules 8 are connect with main control module 4, for carrying out timely alarm according to acquisition abnormity data by alarm device
Notice.
Display module 9 is connect with main control module 4, for the cable image by display display acquisition, temperature, humidity
And fault-signal, position, range data.
As shown in Fig. 2, the electric fault detection method provided in an embodiment of the present invention for cable includes:
S101 acquires cable image data using improved picture pick-up device；Cable temperature number is acquired using temperature sensor
According to；Cable humidity data is acquired using humidity sensor.
S102 utilizes the diagnostic circuit diagnosing cable fault-signal based on SSTDR；Using positioning device according to fault-signal
Positioning cable abort situation；Cable fault distance is measured using ranging procedure.
S103 carries out timely alert notification according to acquisition abnormity data using alarm device.
S104 utilizes cable image, temperature, humidity and the fault-signal of display display acquisition, position, range data.
In step S102, picture pick-up device improved method provided in an embodiment of the present invention is specifically included:
The picture pick-up device is improved, picture pick-up device by gray level image cross hairs region clarity theoretical model algorithm
Interior image is made of m × n pixel, grey scale pixel value matrix B (I, J), wherein 0≤I≤m-1,0≤J≤n-1.
Cross hairs gray level image maximum gradation value Bmax, minimum gradation value Bmin, then the 1/2 of gray scale difference value uses BdifIt can table
Show and be shown below:
According to cross hairs gray level image sharpness computation theoretical model, if the clarity of gray level image is C, available ten
Wordline gray level image clarity improved model, is shown below:
In step S102, the cable fault signal diagnosis provided in an embodiment of the present invention based on SSTDR is specifically included:
After PN code and sinusoidal signal to be carried out to 1:1 band spectrum modulation BPSK (Binary Phase Shift Keying, two
System phase-shift keying) signal is as incoming signal injection cable under test, and when cable under test breaks down, incoming signal is in cable
Fault point can be reflected due to impedance mismatch, incoming signal and the reflection signal of acquisition are subjected to related operation:
In formula, s (t) is incoming signal, and s (t- τ) is reflection signal, and τ indicates incoming signal and reflects prolonging between signal
When, r (t) is correlation result.When open-circuit fault occurs, reflection signal amplitude is positive；When short trouble, signal width is reflected
Value is negative；And the distance between auto-correlation wave head and reflection wave head are fault distance.
In step S102, fault location module provided in an embodiment of the present invention is positioned using positioning device according to fault-signal
Cable fault position specifically includes:
(1) multimeter is configured, by cable shorted on one end, the other end and multimeter are electrically connected, and measure cable with multimeter
Resistance it is whether infinitely great, if resistance value be not it is infinitely great, carry out step (2)；If resistance value is infinitely great, cable open circuit, into
Row step (3).
(2) alternate or whether insulation resistance over the ground is greater than 100k Ω with multimeter measurement cable, if more than 100k Ω,
Then cable fault type is high resistive fault；If being less than 100k Ω, cable fault is low resistance faults.
(3) if cable fault is high resistive fault, flashover method bigness scale fault coverage is used, then carry out step (5).
(4) if failure is low resistance faults, with impulse method bigness scale fault coverage, then step (5) are carried out.
(5) fault point is accurately positioned with impacting with high pressure method.
In step (3), flashover method provided in an embodiment of the present invention is specifically included:
The instrument that flashover method is used includes: tester, the first charging capacitor and the first discharging gap.
The anode of the measurement end of the tester and first charging capacitor is electrically connected, first discharging gap
The positive cathode with first charging capacitor is electrically connected, and one end of cathode and tested cable is electrically connected, and is tested cable
The other end ground connection.
Flashover method the following steps are included:
It charges to the first charging capacitor, after voltage reaches certain numerical value, the electric discharge of the first discharging gap inputs instantaneous high pressure
In cable run.
When the instantaneous pressure is higher than fault point disruptive critical voltage, fault point is breakdown and discharges, and generates to cable
The periodical echo-signal that both ends are propagated.
The test lead of tester captures the echo-signal twice, and records time difference and the echo of twice return signal
Signal cable transmission speed, according to time difference and speed calculate fault point to test lead distance.
It is provided in an embodiment of the present invention that cable fault is measured using ranging procedure by fault localization module in step S102
Distance specifically includes:
(1) one section of cable under test is intercepted as reference cable at detection scene by measuring appliance, measures the reference cable
Length L.
(2) one end of Xiang Suoshu reference cable successively emits N number of reference burst signal, is measured respectively in reference burst signal
Launch point receives reflection signal elapsed time Δ T1, Δ T2... ... Δ TN。
(3) spread speed V of the N number of reference burst signal in the reference cable is calculated according to formulai=2L/
ΔTi, wherein i=1,2 ... ... N.
(4) according to calculated N number of spread speed, average speed V=∑ V is calculatedi/N。
(5) the one detection pulse signal of one end transmitting of Xiang Suoshu cable under test, measurement connect in detection pulse signal launch point
Receive reflection signal elapsed time Δ T.
(6) the distance between the detection pulse signal launch point and fault point D=V Δ T/2 is calculated according to formula.
It is provided in an embodiment of the present invention logical according to the timely alarm of acquisition abnormity data progress using alarm device in step S103
Know and specifically include:
Timely alarm, when pressing alarm hand push button, alarm terminal are carried out according to acquisition abnormity data using alarm device
Alarm request is generated, alarm request can pass to the main control module of message center, can handle by the voice mapping mechanism of main control module
Alarm request is transmitted to corresponding alarm voice terminal；Meanwhile Alarm Server can monitor always the voice communication of main control module
Interface, when there is alert, Alarm Server listens to the alarm request of alarm, and Alarm Server passes to alarm request
Display module, display module transfers the video information of alarm according to alarm request, and video is launched onto video wall；It is real
Remote command of the existing control centre to alarm point.
It is provided in an embodiment of the present invention logical according to the timely alarm of acquisition abnormity data progress using alarm device in step S103
Know further include:
It is carried out in timely alarm using alarm device according to acquisition abnormity data, alarm device is alarmed by preset abnormal data
One abnormal data alarm signal working frequency critical value of the control chip of program setting alarm device.
Judge that a maximum can handle load capacity according to abnormal data alarm signal working frequency critical value.
Multiple first tasks are combined into one first continuous work task according to platform power administrative skill is collected.
Judge whether a load capacity of the first continuous work task is greater than maximum and can handle load capacity.
It, will be in the first continuous work task when the load capacity of the first continuous work task, which is greater than maximum, to handle load capacity
One of overload part the first task remove the first continuous work task.
When receiving the first continuous work task, the control chip of alarm device is switched into an operation by a suspend mode
Mode, and the first continuous work task of processing.And after the completion of the processing of the first continuous work task, by the control of alarm device
Chip is set as suspend mode.
The operating frequency of the control chip of alarm device under general operation there is a normal operating frequency and method also to wrap
It includes:
One first operation is determined according to the load capacity of the first continuous work task and abnormal data alarm signal critical value
Frequency.
When the control chip of alarm device switches to operation mode, by the operating frequency of the control chip of alarm device by normal
Operating frequency is promoted to the first operating frequency, and handles the first continuous work task by the first operating frequency.First operation frequency
The working frequency of rate is higher than the working frequency of normal operating frequency.
The control chip alarm method of alarm device further include:
After the processing of the first continuous work task is completed and the control chip of alarm device enters suspend mode, according to collecting
First task of multiple second tasks and part of overloading is combined into one second continuously by platform power administrative skill
Task.
When receiving the second continuous work task, the control chip of alarm device is switched into operation mould by suspend mode
Formula.
The operating frequency of the control chip of alarm device is promoted to one second operating frequency by normal operating frequency, passes through
Two operating frequencies handle the second continuous work task.And after the completion of the processing of the second continuous work task, by the control of alarm device
Coremaking piece is set as suspend mode.The working frequency of first operating frequency is higher than the working frequency of normal operating frequency.
Alarm device control chip using the first operating frequency by the first continuous work task processing complete time point with
Initially receiving had for one first interval time between the time point of the second continuous work task, and used normal frequency by first
The processing of continuous work task, which is completed and received, had for one second interval time between the second continuous work task, wherein between first
Every the time less than the second interval time.
The invention will be further described combined with specific embodiments below.
Embodiment 1
6 localization method of fault location module provided by the invention includes:
(1) multimeter is configured, by cable shorted on one end, the other end and multimeter are electrically connected, and measure cable with multimeter
Resistance it is whether infinitely great, if resistance value be not it is infinitely great, carry out step (2).If resistance value is infinitely great, cable open circuit, into
Row step (3).
(2) alternate or whether insulation resistance over the ground is greater than 100k Ω with multimeter measurement cable, if more than 100k Ω,
Then cable fault type is high resistive fault.If being less than 100k Ω, cable fault is low resistance faults.
(3) if cable fault is high resistive fault, flashover method bigness scale fault coverage is used, then carry out step (5).
(4) if failure is low resistance faults, with impulse method bigness scale fault coverage, then step (5) are carried out.
(5) fault point is accurately positioned with impacting with high pressure method.
The instrument that flashover method described in step (3) provided by the invention is used includes: tester, the first charging capacitor and
One discharging gap.
The anode of the measurement end of the tester and first charging capacitor is electrically connected, first discharging gap
The positive cathode with first charging capacitor is electrically connected, and one end of cathode and tested cable is electrically connected, and is tested cable
The other end ground connection.
Flashover method described in step (3) provided by the invention the following steps are included:
It charges to the first charging capacitor, after voltage reaches certain numerical value, the electric discharge of the first discharging gap inputs instantaneous high pressure
In cable run.
When the instantaneous pressure is higher than fault point disruptive critical voltage, fault point is breakdown and discharges, and generates to cable
The periodical echo-signal that both ends are propagated.
The test lead of tester captures the echo-signal twice, and records time difference and the echo of twice return signal
Signal cable transmission speed, according to time difference and speed calculate fault point to test lead distance.
Embodiment 2
7 distance measuring method of fault localization module provided by the invention includes:
(1) one section of cable under test is intercepted as reference cable at detection scene by measuring appliance, measures the reference cable
Length L.
(2) one end of Xiang Suoshu reference cable successively emits N number of reference burst signal, is measured respectively in reference burst signal
Launch point receives reflection signal elapsed time Δ T1, Δ T2... ... Δ TN。
(3) spread speed V of the N number of reference burst signal in the reference cable is calculated according to formulai=2L/
ΔTi, wherein i=1,2 ... ... N.
(4) according to calculated N number of spread speed, average speed V=∑ V is calculatedi/N。
(5) the one detection pulse signal of one end transmitting of Xiang Suoshu cable under test, measurement connect in detection pulse signal launch point
Receive reflection signal elapsed time Δ T.
(6) the distance between the detection pulse signal launch point and fault point D=V Δ T/2 is calculated according to formula.
In embodiments of the present invention, step 3 carries out timely alarm according to acquisition abnormity data using alarm device, presses report
When alert device hand push button, alarm terminal generates alarm request, and alarm request can pass to the main control module of message center, pass through master control
Alarm request can be transmitted to corresponding alarm voice terminal by the voice mapping mechanism of module.Meanwhile Alarm Server can be always
The voice communication interface of main control module is monitored, when there is alert, Alarm Server listens to the alarm request of alarm, alarm
Alarm request is passed to display module by server, and display module transfers the video information of alarm according to alarm request, and
Video is launched onto video wall.Realize control centre to the remote command of alarm point.
In embodiments of the present invention, when Alarm Server captures exception information, under the picture frame at time point is saved
Come, is simultaneously emitted by alarm request, alarm request can reach the exception information server of message center, exception information server first
According to the corresponding relationship in the source place of video and alarm area under one's jurisdiction, alarm request is passed to the display module of corresponding alarm,
After display module receives the alarm request of exception information server, responds alarm request and launch abnormal frame picture to receiving a crime report
On display module.When the abnormal frame image of dispensing belongs to normal condition, user terminates to alarm by display module.Abnormal frame image
When belonging to abnormal condition, user by display module to alarm further responsive to.Display module can be transferred according to alarm request
The video information on alarm ground, and the video information of alarm is shown on the display module.
Embodiment 3
The present invention is carried out in timely alarm using alarm device according to acquisition abnormity data, and alarm device passes through preset abnormal number
According to an abnormal data alarm signal working frequency critical value of the control chip of alert program setting alarm device.
Judge that a maximum can handle load capacity according to abnormal data alarm signal working frequency critical value.
Multiple first tasks are combined into one first continuous work task according to platform power administrative skill is collected.
Judge whether a load capacity of the first continuous work task is greater than maximum and can handle load capacity.
It, will be in the first continuous work task when the load capacity of the first continuous work task, which is greater than maximum, to handle load capacity
One of overload part the first task remove the first continuous work task.
When receiving the first continuous work task, the control chip of alarm device is switched into an operation by a suspend mode
Mode, and the first continuous work task of processing.After the completion of the processing of the first continuous work task, by the control chip of alarm device
It is set as suspend mode.
The operating frequency of the control chip of alarm device under general operation there is a normal operating frequency and method also to wrap
It includes:
One first operation is determined according to the load capacity of the first continuous work task and abnormal data alarm signal critical value
Frequency.
When the control chip of alarm device switches to operation mode, by the operating frequency of the control chip of alarm device by normal
Operating frequency is promoted to the first operating frequency, and handles the first continuous work task by the first operating frequency.First operation frequency
The working frequency of rate is higher than the working frequency of normal operating frequency.
Embodiment 4
Based on embodiment 3, the control chip alarm method of alarm device further include:
After the processing of the first continuous work task is completed and the control chip of alarm device enters suspend mode, according to collecting
First task of multiple second tasks and part of overloading is combined into one second continuously by platform power administrative skill
Task.
When receiving the second continuous work task, the control chip of alarm device is switched into operation mould by suspend mode
Formula.
The operating frequency of the control chip of alarm device is promoted to one second operating frequency by normal operating frequency, passes through
Two operating frequencies handle the second continuous work task.After the completion of the processing of the second continuous work task, by the control core of alarm device
Piece is set as suspend mode.
The working frequency of first operating frequency is higher than the working frequency of normal operating frequency.
Alarm device control chip using the first operating frequency by the first continuous work task processing complete time point with
Initially receiving had for one first interval time between the time point of the second continuous work task, and used normal frequency by first
The processing of continuous work task, which is completed and received, had for one second interval time between the second continuous work task, wherein between first
Every the time less than the second interval time.
Embodiment 5
Fault diagnosis main circuit of the invention for realizing switch control relay, then by relay controls light bulb.
Fault Mapping circuit controls 19 relays by main control chip, 19 kinds of failures is projected fault diagnosis master in real time
In circuit.
Display, for realizing fault setting and the display of diagnostic result.
Main control chip, for realizing the control to serial ports screen information exchange and Fault Mapping circuit.
In the circuit of the main control chip:
P1 is power interface, connects 12V, 5V dual power supply.
P2 is debugging serial ports, and even computer serial port carries out debugging or system detection.
P3 is serial ports screen data-interface, connects serial ports screen, provides power supply and data interaction for serial ports screen.
The port VCC provides the power supply of 5V for Fault Mapping circuit.
19 kinds of failures (open circuit and virtual connection failure) in main control chip control relay control bulb circuit of the present invention；It will setting
Failure thrown into relay control bulb circuit in real time, fault diagnosis is carried out to circuit using examination lamp, multimeter or jumper,
Confirmation a part is deposited after the failure, clicks " open circuit " or " virtual connection " button of corresponding position over the display；If correct judgment,
System " can remove " failure immediately.
In Fig. 3, P2 is debugging serial ports.The interface can connect computer serial port and carry out debugging or system detection.P3 is serial ports screen
Data-interface.The interface connects serial ports screen, provides power supply and data interaction for serial ports screen.The port VCC and VCC phase in Fig. 4 in figure
Even, the power supply of 5V is provided for Fault Mapping circuit；The port V12 is connected with V12 in Fig. 4, provides 12V to fault diagnosis main circuit
Power supply；The port GND is connected with GND in Fig. 4, dual power supply common ground.A [0..15] and the port [0..15] B and Fig. 4 respective end
Mouth is connected, and respectively drives power transfer relay to control fault diagnosis main circuit " failure " state.
The port VCC, V12 and GND is connected with the corresponding port Fig. 3 respectively in Fig. 4, to obtain power supply；A[0..15],B
[0..15] is connected with the corresponding port Fig. 3, respectively drives JK1~JK19 power transfer relay, realizes " failure " projection.
It is as shown in the table after device connection relationship with 19 kinds of failures to can be seen that main control chip GPIO by Fig. 3 and Fig. 4:
Fig. 5 is the partial enlarged view of Fig. 4.Power supply is illustrated to connect to switch wire local circuit.In figure the port V12 with
The port V12 is connected in Fig. 3, is 12 positive poles；Between instrument connection P4 and P5 be power supply arrive switch wire part, between string side
JK1 virtual connection power transfer relay and JK2 open-circuit fault relay.P4 is connect with No. 3 feet of JK1 relay, No. 5 feet and JK2 of JK1
The connection of No. 3 feet, then connect P5 instrument connection by No. 5 feet of JK2；Go here and there a virtual connection resistance R1 between No. 4 feet and No. 5 feet of JK1.
No. 1 foot of each relay is grounded, and No. 2 feet and the output of 817 Phototube Couplings connect, and passes through the 1 of main control chip control 817
Virtual connection resistance or open circuit are introduced into circuit by number foot level (high level is effective) to make the corresponding failure actuating of relay.
1) N number of test node of circuit is successively numbered from 1 to N, with the minimum grid of x, y both direction all
Test node separate, the element value at abortive haul lattice is filled with 1, and grid is formed by matrix as the position of circuit test node
Matrix P is set, the size of location matrix is the size of grid number；2) it under circuit normal condition, will indicate to survey in location matrix P
The element value of examination node serial number replaces with the signal characteristic value of node at this, obtain circuit it is normal when test node energy matrix
EN；3) the node signal characteristic value in energy matrix EN is taken out, since node 1, calculates separately on each node and circuit
Correlative between other all node signals, using the correlative of each node and other node signals as a line of matrix, structure
Make correlation matrix RN of the symmetrical matrix as circuit test node when normal；4) under fault state, by position square
It indicates that the element value of test node number replaces with the signal characteristic value of node at this in battle array P, obtains test section when fault
The energy matrix EF of point；5) the node signal characteristic value in energy matrix EF is taken out, since node 1, calculates separately each
Signal correlative on node and circuit between other all nodes, using the correlative of each node and other nodes as matrix
A line, the correlation matrix RF of test node when constructing a symmetrical matrix as fault.
(5) by energy matrix EF node signal characteristic value take out, since node 1 ing, calculate separately each node and
Signal correlative on circuit between other all nodes, using the correlative of each node and other nodes as a line of matrix,
The correlation matrix RF of test node when constructing a symmetrical matrix as fault.
In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real
It is existing.When using entirely or partly realizing in the form of a computer program product, the computer program product include one or
Multiple computer instructions.When loading on computers or executing the computer program instructions, entirely or partly generate according to
Process described in the embodiment of the present invention or function.The computer can be general purpose computer, special purpose computer, computer network
Network or other programmable devices.The computer instruction may be stored in a computer readable storage medium, or from one
Computer readable storage medium is transmitted to another computer readable storage medium, for example, the computer instruction can be from one
A web-site, computer, server or data center pass through wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)
Or wireless (such as infrared, wireless, microwave etc.) mode is carried out to another web-site, computer, server or data center
Transmission).The computer-readable storage medium can be any usable medium or include one that computer can access
The data storage devices such as a or multiple usable mediums integrated server, data center.The usable medium can be magnetic Jie
Matter, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk Solid
State Disk (SSD)) etc..
The above is only the preferred embodiments of the present invention, and is not intended to limit the present invention in any form,
Any simple modification made to the above embodiment according to the technical essence of the invention, equivalent variations and modification, belong to
In the range of technical solution of the present invention.
Claims (10)
1. a kind of electric fault detection method for cable, which is characterized in that the electric fault detection side for cable
Method includes:
Step 1 acquires cable image data using picture pick-up device by cable image capture module；It is acquired by cable temperature
Module acquires cable temperature data using temperature sensor；Cable is acquired using humidity sensor by cable humidity collection module
Humidity data；
Step 2, main control module utilize diagnostic circuit diagnosing cable fault-signal by fault diagnosis module；Diagnostic circuit includes:
Fault diagnosis main circuit for realizing switch control relay, then by relay controls light bulb；
Fault Mapping circuit controls 19 relays by main control chip, 19 kinds of failures is projected fault diagnosis main circuit in real time
In；
Display, for realizing fault setting and the display of diagnostic result；
Main control chip, for realizing the control to serial ports screen information exchange and Fault Mapping circuit；
In the circuit of the main control chip:
P1 is power interface, connects 12V, 5V dual power supply；
P2 is debugging serial ports, and even computer serial port carries out debugging or system detection；
P3 is serial ports screen data-interface, connects serial ports screen, provides power supply and data interaction for serial ports screen；
The port VCC provides the power supply of 5V for Fault Mapping circuit；
It is specifically included using positioning device according to fault-signal positioning cable abort situation by fault location module:
(1) multimeter is configured, by cable shorted on one end, the other end and multimeter are electrically connected, with the electricity of multimeter measurement cable
Whether resistance is infinitely great, if resistance value is not infinitely great, progress step (2)；If resistance value is infinitely great, cable open circuit is walked
Suddenly (3)；
(2) alternate or whether insulation resistance over the ground is greater than 100k Ω with multimeter measurement cable, if more than 100k Ω, then cable
Fault type is high resistive fault；If being less than 100k Ω, cable fault is low resistance faults；
(3) if cable fault is high resistive fault, flashover method bigness scale fault coverage is used, then carry out step (5)；
(4) if failure is low resistance faults, with impulse method bigness scale fault coverage, then step (5) are carried out；
(5) fault point is accurately positioned with impacting with high pressure method；
Cable fault distance is measured using ranging procedure by fault localization module, is specifically included:
(1) one section of cable under test is intercepted as reference cable at detection scene by measuring appliance, measures the length of the reference cable
Spend L；
(2) one end of Xiang Suoshu reference cable successively emits N number of reference burst signal, measures emit in reference burst signal respectively
Point receives reflection signal elapsed time Δ T1, Δ T2... ... Δ TN；
(3) spread speed V of the N number of reference burst signal in the reference cable is calculated according to formulai=2L/ Δ Ti,
Middle i=1,2 ... N；
(4) according to calculated N number of spread speed, average speed V=∑ V is calculatedi/N；
(5) the one detection pulse signal of one end transmitting of Xiang Suoshu cable under test, measurement are received in detection pulse signal launch point
Reflect signal elapsed time Δ T；
(6) the distance between the detection pulse signal launch point and fault point D=V Δ T/2 is calculated according to formula；
Step 3 carries out timely alert notification according to acquisition abnormity data using alarm device by alarm modules；
Step 4, by display module using display display acquisition cable image, temperature, humidity and fault-signal, position,
Range data.
2. being used for the electric fault detection method of cable as described in claim 1, which is characterized in that described in the step (3)
The instrument that flashover method is used includes: tester, the first charging capacitor and the first discharging gap；
The anode of the measurement end of the tester and first charging capacitor is electrically connected, the anode of first discharging gap
It is electrically connected with the cathode of first charging capacitor, one end of cathode and tested cable is electrically connected, and is tested the another of cable
One end ground connection.
3. being used for the electric fault detection method of cable as described in claim 1, which is characterized in that described in the step (3)
Flashover method the following steps are included:
It charges to the first charging capacitor, after voltage reaches certain numerical value, the first discharging gap electric discharge, by instantaneous high pressure input cable
In route；
When the instantaneous pressure is higher than fault point disruptive critical voltage, fault point is breakdown and discharges, and generates to cable ends
The periodical echo-signal of propagation；
The test lead of tester captures the echo-signal twice, and records time difference and the echo-signal of twice return signal
In the speed of cable transmission, according to time difference and speed calculate fault point to test lead distance.
4. being used for the electric fault detection method of cable as described in claim 1, which is characterized in that step 3 utilizes alarm device root
Timely alarm is carried out according to acquisition abnormity data, when pressing alarm hand push button, alarm terminal generates alarm request, alarm request
The main control module that message center can be passed to can be transmitted to alarm request corresponding by the voice mapping mechanism of main control module
It receives a crime report voice terminal；Meanwhile Alarm Server can monitor always the voice communication interface of main control module, and when there is alert, report
Alert server listens to the alarm request of alarm device, and alarm request is passed to display module, display module root by Alarm Server
The video information of alarm is transferred according to alarm request, and video is launched onto video wall；Realize control centre to alarm point
Remote command.
5. being used for the electric fault detection method of cable as claimed in claim 4, which is characterized in that when Alarm Server captures
When exception information, the picture frame at time point is preserved, is simultaneously emitted by alarm request, alarm request can reach in message first
The exception information server of the heart, exception information server will alarm according to the source place of video and the corresponding relationship in alarm area under one's jurisdiction
Request passes to the display module of corresponding alarm, after display module receives the alarm request of exception information server, response
Alarm request simultaneously launches abnormal frame picture onto alarm display module；When the abnormal frame image of dispensing belongs to normal condition,
User terminates to alarm by display module；When abnormal frame image belongs to abnormal condition, user by display module to alarm into
The response of one step；Display module can transfer the video information on alarm ground according to alarm request, and the video information on alarm ground is shown
On the display module.
6. being used for the electric fault detection method of cable as described in claim 1, which is characterized in that step 3 utilizes alarm device root
Timely alarm is carried out according to acquisition abnormity data, alarm device sets the control core of alarm device by preset abnormal data alert program
One abnormal data alarm signal working frequency critical value of piece；
Judge that a maximum can handle load capacity according to abnormal data alarm signal working frequency critical value；
Multiple first tasks are combined into one first continuous work task according to platform power administrative skill is collected；
Judge whether a load capacity of the first continuous work task is greater than maximum and can handle load capacity.
7. being used for the electric fault detection method of cable as claimed in claim 6, which is characterized in that when the first continuous work task
Load capacity be greater than maximum when can handle load capacity, by the first task of one of first continuous work task overload part
Remove the first continuous work task；
When receiving the first continuous work task, the control chip of alarm device is switched into an operation mould by a suspend mode
Formula, and the first continuous work task of processing；And after the completion of the processing of the first continuous work task, by the control core of alarm device
Piece is set as suspend mode；
The operating frequency of the control chip of alarm device has a normal operating frequency and method under general operation further include:
One first operating frequency is determined according to the load capacity of the first continuous work task and abnormal data alarm signal critical value；
When the control chip of alarm device switches to operation mode, by the operating frequency of the control chip of alarm device by normal operating
Frequency upgrading handles the first continuous work task to the first operating frequency, and by the first operating frequency；First operating frequency
Working frequency is higher than the working frequency of normal operating frequency.
The control chip alarm method of alarm device further include:
After the processing of the first continuous work task is completed and the control chip of alarm device enters suspend mode, according to collecting platform
First task of multiple second tasks and part of overloading is combined into one second continuous work by power management techniques
Task；
When receiving the second continuous work task, the control chip of alarm device is switched into operation mode by suspend mode；
The operating frequency of the control chip of alarm device is promoted to one second operating frequency by normal operating frequency, passes through the second behaviour
Working frequency handles the second continuous work task；And after the completion of the processing of the second continuous work task, by the control core of alarm device
Piece is set as suspend mode；The working frequency of first operating frequency is higher than the working frequency of normal operating frequency.
First continuous work task is handled the time point completed and beginning using the first operating frequency by the control chip of alarm device
Receiving had for one first interval time between the time point of the second continuous work task, and used normal frequency continuous by first
Task processing, which is completed and received, had for one second interval time between the second continuous work task, wherein when the first interval
Between less than the second interval time.
8. a kind of electric fault detection system for cable, which is characterized in that the electric fault detection system for cable
System includes:
Cable image capture module, connect with main control module, for acquiring cable image data by picture pick-up device；
Cable temperature acquisition module, connect with main control module, for acquiring cable temperature data by temperature sensor；
Cable humidity collection module, connect with main control module, for acquiring cable humidity data by humidity sensor；
Main control module, with cable image capture module, cable temperature acquisition module, cable humidity collection module, fault diagnosis mould
Block, fault location module, fault localization module, alarm modules, display module connection, for controlling each mould by main control chip
Block works normally；
Fault diagnosis module is connect with main control module, for passing through diagnostic circuit diagnosing cable fault-signal；
Fault location module, connect with main control module, for passing through positioning device according to fault-signal positioning cable abort situation；
Fault localization module, connect with main control module, for measuring cable fault distance by ranging procedure；
Alarm modules are connect with main control module, for carrying out timely alert notification according to acquisition abnormity data by alarm device；
Display module is connect with main control module, for cable image, temperature, humidity and the failure by display display acquisition
Signal, position, range data.
9. at a kind of information data realized described in claim 1~7 any one for the electric fault detection method of cable
Manage terminal.
10. a kind of computer readable storage medium, including instruction, when run on a computer, so that computer executes such as
The electric fault detection method of cable is used for described in claim 1~7 any one.
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| CN111610410A (en) * | 2020-05-27 | 2020-09-01 | 上海岩芯电子科技有限公司 | SSTDR technology-based photovoltaic cable sub-health detection and positioning method |
| CN111707902A (en) * | 2020-06-11 | 2020-09-25 | 山西潞安环保能源开发股份有限公司五阳煤矿 | Underground cable fault detection device and method based on infrared image |
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| CN113866551A (en) * | 2021-08-04 | 2021-12-31 | 国网浙江慈溪市供电有限公司 | Portable multifunctional cable fault detection device and cable fault detection method |
| CN113960408A (en) * | 2021-09-14 | 2022-01-21 | 广州番禺电缆集团有限公司 | Cable fault prediction method, device and equipment for optical fiber temperature measurement and storage medium |
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| CN113960408A (en) * | 2021-09-14 | 2022-01-21 | 广州番禺电缆集团有限公司 | Cable fault prediction method, device and equipment for optical fiber temperature measurement and storage medium |
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