Longitudinal tear detection method and alarm device for capacitive rubber belt conveyer

Abstract

The invention provides a longitudinal tear detection alarm device for a capacitive rubber belt conveyer. One group of bilaterally-symmetrical and equal planar capacitive sensor 2 and planar capacitive sensor 3 are arranged below a rubber belt 1, and are connected to a capacitance detection circuit to perform capacitance detection on a rubber belt serving as a medium; the capacitance detection circuit is used for converting a detected capacitance value into a voltage signal, and is then used for connecting a high-accuracy rectifying circuit, a differential amplifier circuit and an A / D (Analog to Digital) conversion circuit to a single-chip microcomputer in sequence respectively; the single-chip microcomputer is used for performing data processing on the received signal; when the rubber belt is damaged by foreign matters or is torn, the signal changes over a threshold value, and the single-chip microcomputer outputs an alarm. The longitudinal tear detection alarm device is simple in structure, is convenient for installation and construction, is low in cost, is resistant to interference, and is suitable for ordinary rubber conveying belts and steel wire rope core conveying belts. Surface damage and tear of the rubber belt can be detected and alarmed in time, so that the expansion of accidents is prevented.

Description

technical field [0001] The invention relates to the technical field of automatic detection of belt conveyors, in particular to a technology for timely detection and alarm of belt longitudinal tearing accidents occurring during the operation of belt conveyors. Background technique [0002] The belt conveyor is a widely used continuous material conveying equipment. The rubber conveyor belt is the main component of the belt conveyor, and its cost accounts for about half of the entire belt conveyor. Longitudinal tearing of the tape is caused by sharp foreign objects, material jams, tape deviation, wire rope core pulling, etc. If the tape is not detected in time and the machine is alarmed and shut down in time, it will cause major accidents and economic losses. [0003] At present, the detection methods for longitudinal tearing of belt conveyors mainly include: X-ray flaw detection method, pre-embedded (coil) method, ultrasonic method, CCD imaging method, infrared method, radio f...

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Problems solved by technology

[0002] The belt conveyor is a widely used continuous material conveying equipment. The rubber conveyor belt is the main component of the belt conveyor, and its cost accounts for about half of the entire belt conveyor. Longitudinal tearing of the tape is caused by sharp foreign objects, material jams, tape deviation, wire rope core pulling, etc. If it is not found in time and the alarm is stopped in time, it will cause major accidents and economic losses.

[0003] At present, the detection methods for longitudinal tearing of belt conveyors mainly include: X-ray flaw detection method, pre-embedded (coil) method, ultrasonic method, CCD imaging method, infrared method, radio frequency method, etc. These methods have their own advantages and disadvantages. The main disadvantages are The structure is complex, the cost is high, the site environment is harsh, and the tape needs to be processed twice. There are also simple types such as conductive rubber type, string type, leakage detection type, etc. This type of detection method will damage the surface of the tape. Neither can be detected in time and accurately, and can only be discovered after the tape is pierced by foreign objects and touches the switch mechanism under the tape or is pierced by foreign objects and at the same time there is enough material leaking down to the pallet

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