Distributed optical fiber temperature measurement-based fire early warning method for belt conveyor

Abstract

The invention relates to the field of coal mine safety, in particular to a distributed optical fiber temperature measurement-based fire early warning method for a belt conveyor. The method comprises the following steps of: dividing a temperature measuring optical fiber into a temperature measuring point, a channel and an area, and processing temperature data measured by the temperature measuring optical fiber by an absolute temperature early warning method, an area relative temperature difference early warning method, an area normal distribution early warning method, a measuring point temperature rise slope early warning method and a measuring point temperature rise variation trend early warning method to acquire a channel threshold early warning characteristic value, an area threshold early warning characteristic value, an area relative temperature early warning characteristic value, an area temperature normal distribution statistical characteristic value, a measuring point threshold early warning characteristic value, a measuring point temperature rise slope early warning characteristic value and a measuring point temperature rise accumulated trend early warning characteristic value; inputting the characteristic values and the measuring point temperature rise accumulated trend early warning characteristic value into a back propagation (BP) neural network model; and outputting a warning coefficient, an early warning coefficient and a safety coefficient by using the BP neural network model.

Description

technical field [0001] The invention relates to the field of coal mine safety, in particular to a fire early warning method for a mine belt conveyor. Background technique [0002] Mining belt conveyors are prone to fires due to long-term use. The main causes of fires are as follows: ①Drum slipping: Under normal operating conditions, the slip rate of the belt relative to the surface of the drum generally does not exceed 2%. If the tape slips, there will be a large relative sliding between the tape and the roller, which will cause the friction temperature to rise. If it is not discovered in time, once the temperature rises to the ignition temperature of the tape, it will cause a fire. The common reasons for the slipping of the active roller are: full warehouse Pile of coal at the rear head, serious wear of the anti-skid rubber on the roller, full-load start after emergency stop, etc.; the main reason for the slippage of the driven roller is that the roller bearing is seriously...

AI Technical Summary

Problems solved by technology

However, the current smoke and carbon monoxide detection technology has great limitations. The false alarm rate is very high when used in the field, and the use effect is not good; there are many kinds of temperature detection technologies, from traditional Pt resistors to memory alloys and non-contact infrared Technologies such as temperature measurement cannot realize distributed and continuous monitoring of the entire transportation lane

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