Elevator traction steel belt defect detection device based on vision and electromagnetic technology

Abstract

The invention relates to an elevator traction steel belt defect detection device based on a vision and electromagnetic technology. The device comprises a camera I, a camera bracket I, a guide wheel, a magnetizing device, a buckle, a magnetic sensor, a photoelectric encoder, a data processing circuit board, a handle, a camera bracket II, a camera II and an upper computer. The device has the following advantages: 1, the device integrates visual detection and electromagnetic detection, and can detect the internal and surface defects of the elevator traction steel belt at the same time; and 2, the device can realize quick disassembly and assembly of the camera, and facilitates quick selection of visual detection modes. Meanwhile, the device is simple in structure, low in production cost and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of detection, and in particular relates to a defect detection device for elevator traction steel strips based on vision and electromagnetic technology. Background technique [0002] At present, there is no special instrument for the inspection of elevator traction steel belts, and there are no clear inspection requirements and inspection methods in the current standards and regulations. Only refer to the inspection requirements and methods for steel wire ropes in the existing standards and specifications, and combine the relevant regulations in the manufacturer's product manual to inspect and test the composite traction steel belt to determine its compliance. [0003] In order to ensure the safe operation of the equipment and avoid accidents caused by steel strip breakage, the main methods currently used are manual visual inspection, regular replacement, magnetic flux leakage detection and resistance detecti...

AI Technical Summary

Problems solved by technology

The artificial visual method can only observe the damage on the surface of the steel strip, which consumes a lot of manpower and cannot fully see the damage of the steel strip

The visual method can only observe the surface defects of the steel strip, and the surface of the steel strip is coated with polymer insulating material, so it is impossible to see the damage of the steel wire inside the steel strip

If the method of regular replacement is adopted, the steel strips that are replaced regularly are basically steel strips that are not damaged and can continue to be used. Although the regular replacement of steel strips can reduce the occurrence of steel strip fractures to a certain extent, the replacement The undamaged steel strip still causes great waste. There are too many accidental factors in nature. The above method cannot prevent the occurrence of steel strip fracture accidents, causing a lot of waste, and the safety hazard has not been eliminated.

Flux leakage detection requires an excitation device. The magnetic circuit composed of permanent magnet steel, armature and steel strip must reach the magnetization and saturation of the steel wire in an instant. Generally, it is magnetized while detecting, and there are uneven saturation magnetization of the steel wire, weak interference ability of the sensor and It is not easy to realize the online detection of the steel strip and other problems

The resistance detection method uses the relationship between the change of the resistance value of the steel cord in the steel belt and the remaining strength, the theory is relatively simple, and the online monitoring function can be realized, but it is greatly affected by the temperature change on site

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