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[0009] The purpose of the present invention is to design an improved cable aging position infrared detector for the problems of the invention patent "A Power Line Aging Infrared Detecting Device and Detection Method", the device structure is complicated, the cost is high, the method steps are complicated and the operation is complicated, and the accuracy of the aging lateral position is low. Detection method
Method used
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specific Embodiment 1
[0054] This embodiment is an embodiment of a cable aging position detection device based on infrared imaging and temperature detection.
[0055] The cable aging position detection device based on infrared imaging and temperature detection in this embodiment, the structural diagram is as follows figure 1 As shown, the cable aging position detection device based on infrared imaging and temperature detection includes an upper ring 1 without rotation function, a middle ring 2 and a lower ring 3 arranged in sequence from top to bottom, and the middle ring 2 is located at The middle position of the upper ring 1 and the lower ring 3, the cable passes through the upper ring 1, the middle ring 2 and the lower ring 3; the upper ring 1 is evenly provided with a plurality of temperature sensors; the middle ring 2 The inside is provided with a resistance wire that plays a heating function, and the outside is uniformly provided with a first infrared camera 21, a second infrared camera 22, a...
specific Embodiment 2
[0056] This embodiment is an embodiment of a cable aging position detection method based on infrared imaging and temperature detection.
[0057] The cable aging position detection method based on infrared imaging and temperature detection in this embodiment is implemented on the cable aging position detection device based on infrared imaging and temperature detection described in Embodiment 1. The method includes the following steps:
[0058] Step a, heating the cable with the middle ring 2;
[0059] Step b, let the cable cool naturally, the cooling temperature is higher than the temperature before heating;
[0061] Step d, determining the aging axial position;
[0062] Step e, determine the spatial position according to the aging transverse position and axial position.
specific Embodiment 3
[0063] This embodiment is an embodiment of a cable aging position detection method based on infrared imaging and temperature detection.
[0064] The cable aging position detection method based on infrared imaging and temperature detection in this embodiment, on the basis of the specific embodiment 1, further defines that step c includes the following steps:
[0066] The first infrared camera 21 obtains grayscale data k1, the second infrared camera 22 obtains grayscale data k2, the third infrared camera 23 obtains grayscale data k3, the fourth infrared camera 24 obtains grayscale data k4, and the fifth infrared camera 25 obtains grayscale data k5, the sixth infrared camera 26 obtains grayscale data k6;
[0067] Step c2. Obtain the aging lateral position from the horizontal plane where the middle ring is located
[0068] Judge |k1-k2|, |k2-k3|, |k3-k4|, |k4-k5|, |k5-k6| and |k6-k1| two adjacent or separated maximum values, if: ...
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Abstract
The invention relates to a method for detecting a cable aging position based on infrared imaging and temperature detection, belonging to the technical field of electric and infrared detection. The method is characterized by comprising the steps of obtaining series gray level data from six cameras on a middle annular ring, carrying out subtraction on the gray level data of each two adjacent cameras to obtain six groups of difference data, and finally selecting the maximum value of two adjacent or separated differences from the difference data, so as to directly determine a transverse aging position. Compared with the patient for invention of Infrared Aging Detection Device and Method for Power Lines, the method has the advantages that the calculation and comparative judgment steps of the series gray level data are obviously simplified; and the six cameras are uniformly arranged on the middle annular ring, each camera only needs to cover the one-sixth region, so that the transverse aging position can be determined within one-sixth of a circumference range, and the detection precision is increased by double.
Description
technical field [0001] A cable aging position detection method based on infrared imaging and temperature detection belongs to the technical fields of electric power and infrared detection. Background technique [0002] The cable is usually made of two or more wires twisted, each group of wires is insulated from each other, and the outside is covered with an insulating coating. The cable has the characteristics of internal electrification and external insulation. [0003] This structure is beneficial to protect the cable and prolong its service life, but it still cannot completely avoid aging problems such as oxidation of the conductors in the cable. Once the wires in the cable have aging problems such as oxidation, it will affect the transmission function of the line, and in severe cases, the cable will fail. [0004] Aiming at aging problems such as wire oxidation in the cable, the service life of the cable is specified. After the service life is reached, the cable will b...
Claims
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