Automatic calibration device for current vortex sensor measuring wear loss of TBM hob

Abstract

The invention discloses an automatic calibration device for a current vortex sensor measuring the wear loss of a TBM hob. The automatic calibration device is characterized in that convex guide rails on the two sides of a bottom plate match concave grooves on hob brackets, a hob screw coupling connects a left-handed screw and a right-handed screw together, the screws are rotated to drive the hob brackets to move away from or to each other, and therefore, the distance between the hob brackets is applicable to the installation of hobs of different sizes; the shaft of the hob is embedded into fixed blocks, and is mounted on the semicircular grooves of the hob brackets; a single-chip microcomputer controls a drive circuit, a motor drives a sensor screw to rotate, the distance between a sensor vertical plate moving on the T-shaped guide rails and the blade of the hob changes so as to simulate the wear process of the hob; and a voltage signal output by the current vortex sensor and a distance signal output by a displacement sensor are sent to a conditioning circuit for conditioning and then sent to a single-chip microcomputer for processing, a fitting coefficient of wear loss of the hob is fitted out, and data is displayed.

Description

technical field [0001] The invention relates to equipment detection technology in the industry of full-section hard rock roadheaders, in particular to a calibration device for an eddy current sensor used for detecting the wear amount of a disc-shaped hob in TBM construction. Background technique [0002] TBM is a large-scale construction equipment for tunnel construction. As a tool for TBM to break rocks, the disc hob is the most consumed consumable during the use of the roadheader. When the tool wears to a certain extent, it needs to be replaced immediately, otherwise it will aggravate the wear of other tools and form a vicious circle. [0003] At present, there are mainly four types of hob monitoring: manual detection, odor agent leakage detection, estimation based on tunneling parameters, and automatic detection. Through searching relevant documents and materials at home and abroad, it is found that many universities and research institutions at home and abroad are curre...

AI Technical Summary

Problems solved by technology

[0004] In the automatic detection, because the TBM works underground, the hob is in contact with the rock, the dust is relatively serious, and the main cabin, cutterhead, and hob are surrounded by rock-soil media and groundwater, so it is difficult to use signal receiving devices such as laser, infrared, and ultrasonic waves. Accurate monitoring is achieved, while eddy current sensors can be effectively used in harsher environments

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