Insulating material thermal aging test device and test method based on visual identification

Abstract

The invention discloses an insulating material thermal aging test device based on visual identification, and relates to the technical field of thermal extension tests. The insulating material thermal aging test device comprises a device body, a camera identification system and a sample clamping part; the device body comprises a base and a support located on the base, the camera identification system comprises a camera system and an identification system, the sample clamping part is installed on the support, the camera system is arranged on the base and right faces the sample clamping part, the identification system is integrated in the base, and the identification system is in communication connection with the camera system. According to the invention, a sample can be photographed through the camera under a high-temperature condition, image model comparison is carried out on graphic information through a processing chip and a cache chip, and after sample elongation length data are obtained, the data are transmitted to a remote server, so that the high-temperature operation risk of detection personnel is avoided, and the detection precision is improved.

Description

technical field [0001] The invention relates to the technical field of thermal extension testing, in particular to a thermal aging testing device and testing method for insulating materials based on visual recognition. Background technique [0002] Thermosetting cross-linked polyethylene materials are widely used as insulating materials in various power equipment, such as power cables, overhead insulated wires, transformers, etc. After long-term use, insulating materials may be affected by current-carrying heat and external environmental factors. The aging and damage of materials will affect the safe and stable operation of the power system. The thermal aging performance of insulating materials is usually indirectly measured by the technical parameter "thermal extension". This test is to simulate the change of elongation of the material after a short period of thermal aging under high temperature and load conditions to reflect the plasticity and permanent properties of the m...

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Problems solved by technology

[0002] Thermosetting cross-linked polyethylene materials are widely used as insulating materials in various power equipment, such as power cables, overhead insulated wires, transformers, etc. After long-term use, insulating materials may be affected by current-carrying heat and external environmental factors. The aging and damage of materials will affect the safe and stable operation of the power system

The thermal aging performance of insulating materials is usually indirectly measured by the technical parameter "thermal extension". This test is to simulate the change of elongation of the material after a short period of thermal aging under high temperature and load conditions to reflect the plasticity and permanent properties of the material. Deformation capacity, if the deformation exceeds the standard value under load and thermal conditions, it may cause damage to the performance of the insulating material and cause equipment failure in severe cases

[0003] The thermal extension test needs to prepare the insulating material into a "dumbbell" sample, and measure its elongation under high temperature and load conditions. At present, it mainly relies on artificially using a steel ruler to extend into the oven or measure outside the observation window under high temperature conditions. The elongation of the dumbbell sample, the test process relies on manual operation, and the detection safety and accuracy are low

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