CN106442627B - Cable aging position detecting device based on infrared imaging and temperature detection - Google Patents
Cable aging position detecting device based on infrared imaging and temperature detection Download PDFInfo
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- CN106442627B CN106442627B CN201610943662.1A CN201610943662A CN106442627B CN 106442627 B CN106442627 B CN 106442627B CN 201610943662 A CN201610943662 A CN 201610943662A CN 106442627 B CN106442627 B CN 106442627B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/72—Investigating presence of flaws
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
Abstract
Cable aging position detecting device based on infrared imaging and temperature detection belongs to electric power, infrared detection technology field；The distinguishing feature of the cable aging position detecting device based on infrared imaging and temperature detection is, upper annular ring, middle annular ring and lower annular ring do not have rotation function, and only there are six infrared cameras for setting on middle annular ring, and being arranged respectively on upper annular ring and lower annular ring has multiple temperature sensors；Compared with patent of invention " a kind of power line aging infrared detecting device with detection method ", the present invention is based under the special construction of infrared imaging and the cable aging position detecting device of temperature detection, due to saving upper annular ring, the rotation function of middle annular ring and lower annular ring, and six infrared cameras are reduced to by nine infrared cameras, the three camera costs saved are much higher than the cost of multiple temperature sensors, therefore the complexity of device can not only be reduced, and can reduce installation cost.
Description
Technical field
Cable aging position detecting device based on infrared imaging and temperature detection belongs to electric power, infrared detection technology neck
Domain.
Background technique
Cable is usually to be twisted by two or multiple conducting wires, and mutually insulated between every group of conducting wire, outside is surrounded by insulation
Coating.Cable has interior energization, the feature of external insulation.
This structure is conducive to protect cable, prolongs its service life, but still cannot thoroughly avoid conducting wire in cable
The problem of aging such as oxidation occur.Once the problem of aging such as oxidation occur for the conducting wire in cable, it will the transfer function of route is influenced,
Cable failure will be caused when serious.
For the problem of aging such as conducting wire oxidation in cable, service life is formulated to cable, after reaching service life, just
Cable can be subjected to integral replacing.However, being bound to if cable carries out integral replacing in the case where still having superperformance
Cost can be improved.The method for solving this problem is exactly to inspect periodically to cable, searches conducting wire in cable and aging occurs
Position, then cable is replaced.
Patent of invention " a kind of power line aging infrared detecting device and detection method ", it was found that the conducting wire in cable is old
The characteristic that can make the heating conduction of cable that can change after change, i.e. cable after weathering, the axially and transversely heat of both direction
Transmission speed is different, using this characteristic, has invented a kind of cable aging position infrared detection dress based on heating conduction detection
It sets and detection method, provides new detection means for cable aging position detection.However, the invention has the disadvantages that
The first, disclosed device is needed with rotation function, and is provided with nine infrared cameras, increase device at
This；
The second, disclosed method and step is complicated, has the shortcomings that complicated for operation；
Third can only be covered in one third circumference range due to each infrared image sensor, obtained old
Changing lateral position can only also be limited in one third circumference range, therefore have the shortcomings that precision is low.
Summary of the invention
The purpose of the present invention is in patent of invention " a kind of power line aging infrared detecting device and detection method "
The problem that apparatus structure complexity is at high cost, method and step multioperation is complicated, aging lateral position precision is low designs a kind of improved
Cable aging position infrared detecting device.
To achieve the goals above, the invention discloses a kind of cable aging position based on infrared imaging and temperature detection
Detection device can not only simplify answering for device in patent of invention " a kind of power line aging infrared detecting device and detection method "
Polygamy, and detecting step can be omitted, while detection accuracy can also be improved.
The object of the present invention is achieved like this:
Cable aging position detecting device based on infrared imaging and temperature detection, including set gradually do not have from top to bottom
There are the upper annular ring of rotation function, middle annular ring and a lower annular ring, the middle annular ring is located at upper annular ring and lower annular ring
Middle position, cable are passed through from upper annular ring, middle annular ring and lower annular ring；Multiple temperature are evenly arranged on upper annular ring
Sensor；The resistance wire for being internally provided with heating function of middle annular ring, outside are evenly arranged with the first infrared camera, the
Two infrared cameras, third infrared camera, the 4th infrared camera, the 5th infrared camera and the 6th infrared camera；Under
Multiple temperature sensors are evenly arranged on annular ring；First infrared camera, the second infrared camera, third infrared photography
The output of head, the 4th infrared camera, the 5th infrared camera, the 6th infrared camera and all temperature sensors passes to letter
Number processor.
It is a kind of realized on the above-mentioned cable aging position detecting device based on infrared imaging and temperature detection based on red
The cable aging method for detecting position of outer imaging and temperature detection, comprising the following steps:
Step a, in, annular ring is to electric cable heating；
Step b, allow cable natural cooling, cooling temperature is higher than heat before temperature；
Step c, aging lateral position is determined；
Step d, aging axial position is determined；
Step e, according to aging lateral position and axial position, spatial position is determined.
The above-mentioned cable aging method for detecting position based on infrared imaging and temperature detection, the step c includes following step
It is rapid:
Step c1, serial gradation data is obtained
First infrared camera obtains gradation data k1, and the second infrared camera obtains gradation data k2, and third is infrared to be taken the photograph
As head obtains gradation data k3, the 4th infrared camera obtains gradation data k4, and the 5th infrared camera obtains gradation data k5,
6th infrared camera obtains gradation data k6；
Step c2, therefrom horizontal plane where annular ring obtains aging lateral position
Judgement | k1-k2 |, | k2-k3 |, | k3-k4 |, | k4-k5 |, | k5-k6 | and | k6-k1 | in it is adjacent or be separated by two
A maximum value, if:
| k1-k2 | and | k2-k3 | it is two adjacent maximum values, aging position is located at what the second infrared camera was covered
Region；
| k2-k3 | and | k3-k4 | it is two adjacent maximum values, aging position is located at what third infrared camera was covered
Region；
| k3-k4 | and | k4-k5 | it is two adjacent maximum values, aging position is located at what the 4th infrared camera was covered
Region；
| k4-k5 | and | k5-k6 | it is two adjacent maximum values, aging position is located at what the 5th infrared camera was covered
Region；
| k5-k6 | and | k6-k1| is two adjacent maximum values, and aging position is located at what the 6th infrared camera was covered
Region；
| k6-k1 | and | k1-k2 | it is two adjacent maximum values, aging position is located at what the first infrared camera was covered
Region；
| k1-k2 | and | k3-k4 | for two maximum values being separated by, aging position is located at the second infrared camera and third is red
The boundary of outer camera；
| k2-k3 | and | k4-k5| is two maximum values being separated by, and aging position is located at third infrared camera and the 4th red
The boundary of outer camera；
| k3-k4 | and | k5-k6 | for two maximum values being separated by, aging position is located at the 4th infrared camera and the 5th red
The boundary of outer camera；
| k4-k5| and | k6-k1| is two maximum values being separated by, and aging position is located at the 5th infrared camera and the 6th red
The boundary of outer camera；
| k5-k6 | and | k1-k2 | for two maximum values being separated by, aging position is located at the 6th infrared camera and first red
The boundary of outer camera；
| k6-k1 | and | k2-k3 | for two maximum values being separated by, aging position is located at the first infrared camera and second red
The boundary of outer camera.
The above-mentioned cable aging method for detecting position based on infrared imaging and temperature detection, the step d includes following step
It is rapid:
Step d1, in, annular ring is to electric cable heating；
Step d2, it in defined time t, calculates separately:
The collected temperature data of multiple temperature sensors of upper annular ring
The collected temperature data of multiple temperature sensors of lower annular ring
In formula, tem_1iFor the collected temperature data of i-th of temperature sensor of upper annular ring, tem_2iFor lower annular ring
The collected temperature data of i-th of temperature sensor, n1 are the quantity of temperature sensor in upper annular ring；N2 is in lower annular ring
The quantity of temperature sensor；
Step d3, the curve that t1 (t) and t3 (t) are changed over time is drawn, if:
T1 (t) is above the t3 (t), by the cable aging position detecting device based on infrared imaging and temperature detection to moving down
It is dynamic, repeat step b1；
T1 (t) is below the t3 (t), by the cable aging position detecting device based on infrared imaging and temperature detection to moving up
It is dynamic, repeat step b1；
T1 (t) and t3 (t) is overlapped, and aging axial position is located at plane where middle annular ring.
The utility model has the advantages that
The first, compared with patent of invention " a kind of power line aging infrared detecting device with detection method ", the present invention is based on
The distinguishing feature of infrared imaging and the cable aging position detecting device of temperature detection is, upper annular ring, middle annular ring
Do not have rotation function with lower annular ring, and only there are six infrared cameras for setting on middle annular ring, in upper annular ring
There are multiple temperature sensors with being arranged respectively on lower annular ring, under this structure, due to saving upper annular ring, middle annular ring is under
The rotation function of annular ring, and be reduced to six infrared cameras by nine infrared cameras, three cameras of saving at
This is much higher than the cost of multiple temperature sensors, therefore can not only reduce the complexity of device, and can reduce device at
This；
The second, compared with patent of invention " a kind of power line aging infrared detecting device with detection method ", the present invention is based on
The distinguishing feature of the cable aging position infrared detection method of heating conduction detection is that therefrom six on annular ring take the photograph
As head obtains serial gradation data, then two neighboring camera gradation data is made the difference, obtains six groups of difference datas, finally lead to
It crosses and selects two poor maximum values that are adjacent or being separated by from these differences, directly determine aging lateral position；This method, hence it is evident that
Judgment step is compared in the calculating for simplifying serial gradation data, and due to being uniformly arranged six cameras on middle annular ring,
Each camera only needs to cover 1/6th region, therefore aging lateral position can determine in 1/6th circumference
In range, detection accuracy is doubled.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the cable aging position detecting device the present invention is based on infrared imaging and temperature detection.
In figure: annular ring on 1, annular ring, 21 first infrared cameras, 22 second infrared cameras, 23 thirds are infrared in 2
Camera, 24 the 4th infrared cameras, 25 the 5th infrared cameras, 26 the 6th infrared cameras, 3 lower annular rings.
Specific embodiment
The specific embodiment of the invention is described in further detail with reference to the accompanying drawing.
Specific embodiment one
The present embodiment is the cable aging position detecting device embodiment based on infrared imaging and temperature detection.
The cable aging position detecting device based on infrared imaging and temperature detection of the present embodiment, structural schematic diagram is as schemed
It should include setting gradually not having from top to bottom based on the cable aging position detecting device of infrared imaging and temperature detection shown in 1
There are the upper annular ring 1 of rotation function, middle annular ring 2 and lower annular ring 3, the middle annular ring 2 is located at upper annular ring 1 and lower annular
The middle position of circle 3, cable are passed through from upper annular ring 1, middle annular ring 2 and lower annular ring 3；It is uniformly arranged on upper annular ring 1
There are multiple temperature sensors；The resistance wire for being internally provided with heating function of middle annular ring 2, it is red that outside is evenly arranged with first
Outer camera 21, the second infrared camera 22, third infrared camera 23, the 4th infrared camera 24, the 5th infrared camera
25 and the 6th infrared camera 26；Multiple temperature sensors are evenly arranged on lower annular ring 3；First infrared camera 21, the
Two infrared cameras 22, third infrared camera 23, the 4th infrared camera 24, the 5th infrared camera 25, the 6th infrared takes the photograph
As the output of first 26 and all temperature sensors passes to signal processor.
Specific embodiment two
The present embodiment is the cable aging method for detecting position embodiment based on infrared imaging and temperature detection.
The cable aging method for detecting position based on infrared imaging and temperature detection of the present embodiment, in specific embodiment one
It is realized on the cable aging position detecting device based on infrared imaging and temperature detection, method includes the following steps:
Step a, in, annular ring 2 gives electric cable heating；
Step b, allow cable natural cooling, cooling temperature is higher than heat before temperature；
Step c, aging lateral position is determined；
Step d, aging axial position is determined；
Step e, according to aging lateral position and axial position, spatial position is determined.
Specific embodiment three
The present embodiment is the cable aging method for detecting position embodiment based on infrared imaging and temperature detection.
The cable aging method for detecting position based on infrared imaging and temperature detection of the present embodiment, in specific embodiment one
On the basis of, further limit the step c the following steps are included:
Step c1, serial gradation data is obtained
First infrared camera 21 obtains gradation data k1, and the second infrared camera 22 obtains gradation data k2, and third is red
Outer camera 23 obtains gradation data k3, and the 4th infrared camera 24 obtains gradation data k4, and the 5th infrared camera 25 obtains
Gradation data k5, the 6th infrared camera 26 obtain gradation data k6；
Step c2, therefrom horizontal plane where annular ring obtains aging lateral position
Judgement | k1-k2 |, | k2-k3 |, | k3-k4 |, | k4-k5 |, | k5-k6 | and | k6-k1 | in it is adjacent or be separated by two
A maximum value, if:
| k1-k2 | and | k2-k3 | it is two adjacent maximum values, aging position is located at the second infrared camera 22 and is covered
Region；
| k2-k3 | and | k3-k4 | it is two adjacent maximum values, aging position is located at third infrared camera 23 and is covered
Region；
| k3-k4 | and | k4-k5 | it is two adjacent maximum values, aging position is located at the 4th infrared camera 24 and is covered
Region；
| k4-k5 | and | k5-k6| is two adjacent maximum values, and aging position is located at the 5th infrared camera 25 and is covered
Region；
| k5-k6 | and | k6-k1 | it is two adjacent maximum values, aging position is located at the 6th infrared camera 26 and is covered
Region；
| k6-k1 | and | k1-k2 | it is two adjacent maximum values, aging position is located at the first infrared camera 21 and is covered
Region；
| k1-k2 | and | k3-k4 | for two maximum values being separated by, aging position is located at the second infrared camera 22 and third
The boundary of infrared camera 23；
| k2-k3 | and | k4-k5 | for two maximum values being separated by, aging position is located at third infrared camera 23 and the 4th
The boundary of infrared camera 24；
| k3-k4 | and | k5-k6 | for two maximum values being separated by, aging position is located at the 4th infrared camera 24 and the 5th
The boundary of infrared camera 25；
| k4-k5 | and | k6-k1 | for two maximum values being separated by, aging position is located at the 5th infrared camera 25 and the 6th
The boundary of infrared camera 26；
| k5-k6 | and | k1-k2 | for two maximum values being separated by, aging position is located at the 6th infrared camera 26 and first
The boundary of infrared camera 21；
| k6-k1 | and | k2-k3 | for two maximum values being separated by, aging position is located at the first infrared camera 21 and second
The boundary of infrared camera 22.
Specific embodiment four
The present embodiment is the cable aging method for detecting position embodiment based on infrared imaging and temperature detection.
The cable aging method for detecting position based on infrared imaging and temperature detection of the present embodiment, in specific embodiment one
On the basis of, further limit the step d the following steps are included:
Step d1, in, annular ring 2 gives electric cable heating；
Step d2, it in defined time t, calculates separately:
The collected temperature data of multiple temperature sensors of upper annular ring 1
The collected temperature data of multiple temperature sensors of lower annular ring 3
In formula, tem_1iFor the upper 1 collected temperature data of i-th of temperature sensor of annular ring, tem_2iFor lower annular ring
The 3 collected temperature datas of i-th of temperature sensor, n1 are the quantity of temperature sensor in upper annular ring 1；N2 is lower annular ring
The quantity of temperature sensor in 1；
Step d3, the curve that t1 (t) and t3 (t) are changed over time is drawn, if:
T1 (t) is above the t3 (t), by the cable aging position detecting device based on infrared imaging and temperature detection to moving down
It is dynamic, repeat step b1；
T1 (t) is below the t3 (t), by the cable aging position detecting device based on infrared imaging and temperature detection to moving up
It is dynamic, repeat step b1；
T1 (t) and t3 (t) is overlapped, and aging axial position is located at middle 2 place plane of annular ring.
Claims (1)
1. the cable aging position detecting device based on infrared imaging and temperature detection, which is characterized in that including from top to bottom according to
Secondary upper annular ring (1) of the setting without rotation function, middle annular ring (2) and lower annular ring (3), middle annular ring (2) position
In the middle position of upper annular ring (1) and lower annular ring (3), cable is from upper annular ring (1), middle annular ring (2) and lower annular ring
(3) it is passed through in；Multiple temperature sensors are evenly arranged on upper annular ring (1)；Middle annular ring (2) has been internally provided with heating
The resistance wire of function, outside are evenly arranged with the first infrared camera (21), the second infrared camera (22), third infrared photography
Head (23), the 4th infrared camera (24), the 5th infrared camera (25) and the 6th infrared camera (26)；Lower annular ring (3)
On be evenly arranged with multiple temperature sensors；First infrared camera (21), the second infrared camera (22), third infrared photography
Head (23), the 4th infrared camera (24), the 5th infrared camera (25), the 6th infrared camera (26) and all temperature sensing
The output of device passes to signal processor；
Realized on the cable aging position detecting device based on infrared imaging and temperature detection based on infrared imaging and
The cable aging method for detecting position of temperature detection, comprising the following steps:
Step a, in, annular ring (2) gives electric cable heating；
Step b, allow cable natural cooling, cooling temperature is higher than heat before temperature；
Step c, aging lateral position is determined；The following steps are included:
Step c1, serial gradation data is obtained
First infrared camera (21) obtains gradation data k1, and the second infrared camera (22) obtains gradation data k2, and third is red
Outer camera (23) obtains gradation data k3, and the 4th infrared camera (24) obtains gradation data k4, the 5th infrared camera
(25) gradation data k5 is obtained, the 6th infrared camera (26) obtains gradation data k6；
Step c2, therefrom horizontal plane where annular ring obtains aging lateral position
Judgement | k1-k2 |, | k2-k3 |, | k3-k4 |, | k4-k5 |, | k5-k6 | and | k6-k1 | in it is adjacent or be separated by two most
Big value, if:
| k1-k2 | and | k2-k3 | it is two adjacent maximum values, aging position is located at what the second infrared camera (22) was covered
Region；
| k2-k3 | and | k3-k4 | it is two adjacent maximum values, aging position is located at what third infrared camera (23) was covered
Region；
| k3-k4 | and | k4-k5 | it is two adjacent maximum values, aging position is located at what the 4th infrared camera (24) was covered
Region；
| k4-k5 | and | k5-k6 | it is two adjacent maximum values, aging position is located at what the 5th infrared camera (25) was covered
Region；
| k5-k6 | and | k6-k1 | it is two adjacent maximum values, aging position is located at what the 6th infrared camera (26) was covered
Region；
| k6-k1 | and | k1-k2 | it is two adjacent maximum values, aging position is located at what the first infrared camera (21) was covered
Region；
| k1-k2 | and | k3-k4 | for two maximum values being separated by, aging position is located at the second infrared camera (22) institute area of coverage
The boundary in domain and third infrared camera (23) institute overlay area；
| k2-k3 | and | k4-k5 | for two maximum values being separated by, aging position is located at third infrared camera (23) institute area of coverage
The boundary in domain and the 4th infrared camera (24) institute overlay area；
| k3-k4 | and | k5-k6 | for two maximum values being separated by, aging position is located at the 4th infrared camera (24) institute area of coverage
The boundary in domain and the 5th infrared camera (25) institute overlay area；
| k4-k5 | and | k6-k1 | for two maximum values being separated by, aging position is located at the 5th infrared camera (25) institute area of coverage
The boundary in domain and the 6th infrared camera (26) institute overlay area；
| k5-k6 | and | k1-k2 | for two maximum values being separated by, aging position is located at the 6th infrared camera (26) institute area of coverage
The boundary in domain and the first infrared camera (21) institute overlay area；
| k6-k1 | and | k2-k3 | for two maximum values being separated by, aging position is located at the first infrared camera (21) institute area of coverage
The boundary in domain and the second infrared camera (22) institute overlay area；
Step d, aging axial position is determined；
Step e, according to aging lateral position and axial position, spatial position is determined.
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| CN107024506B (en) * | 2017-03-09 | 2020-06-26 | 深圳市朗驰欣创科技股份有限公司 | Pyrogenicity defect detection method and system |
| CN109580713A (en) * | 2018-10-22 | 2019-04-05 | 天津市启泰机电设备安装工程有限公司 | A kind of insulator on-line detection method |
| CN110987195B (en) * | 2019-11-08 | 2021-05-28 | 广东电网有限责任公司 | System and method for detecting temperature of cable head in running state |
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