Sensor for detecting flux defect of wire rope

Abstract

The invention provides a sensor for detecting the flux defect of a wire rope. The sensor structurally comprises: a signal intelligent processing module, a power module, an excitation coil driving module, an excitation coil, induction coils, a signal preprocessing module, an adder and a differential amplification output module. The sensor is characterized in that: the power module, the excitation coil driving module, the excitation coil, the induction coils, the signal preprocessing module, the adder and the differential amplification output module are sequentially connected; and the power module and the differential amplification output module are respectively connected to two sides of a data intelligent processing module to form a closed loop, while the data intelligent processing moduleis connected with the signal preprocessing module. Two sets of induction coils are used in the sensor to perform detection simultaneously, so that the measured damage signal is doubled, and the signal-to-noise ratio of the damage signal inside and outside the wire rope is improved; and a full-circle induction coil composed of two semi-circular coils is used, so that more on-site operability is realized in the actual installation process and the installation is simpler and more convenient.

Description

technical field [0001] The invention belongs to the technical field of sensors, in particular to a detection sensor for steel wire rope magnetic flux defects. Background technique [0002] At present, with the rapid development of industry and service industry, the application fields of steel wire ropes (such as mines, cableways, hoisting equipment, elevators, port machinery, cable bridges, etc.) are also expanding, but this also makes the use of steel wire ropes Security risks are also becoming more and more prominent. Therefore, the requirements for flaw detection of steel wire ropes are becoming more and more stringent. At present, the domestic magnetic detection methods for steel wire rope defects are mainly magnetic flux leakage detection: Luoyang TCK and TST use weak magnetic detection; and the steel wire rope flaw detection sensors provided by Shanghai Hehua and Huazhong University of Science and Technology use strong magnetic detection. . However, the detection me...

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Problems solved by technology

However, the detection methods adopted by these manufacturers have some defects to varying degrees: first, there is a problem with the uniformity of the magnetized steel wire rope, which will lead to deviations in measurement; Third, in the case of the same damage to the steel wire rope, such as internal broken wires, the magnetic flux leakage is small, while external broken wires, the magnetic flux leakage is relatively large. These factors lead to this type of flaw detection sensor. for difficulty

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