Coal dust concentration dynamic detection system and coal dust concentration dynamic monitoring method of mine

Abstract

The invention discloses an ultrasonic wave-based coal dust concentration dynamic detection system and coal dust concentration dynamic monitoring method of mine. Sixteen ultrasonic sensors are fixed on the inner wall of an inner ring in a uniform angle manner, and every ultrasonic sensor simultaneously has ultrasonic wave emitting and receiving functions; all signal wires are commonly connected to a multi-core plug on an outer ring, the multi-core plug is connected with a programmed multipath toggle switch through a shielded multi-core cable, the programmed multipath toggle switch is respectively connected with a voltage pulse generator and an ultrasonic data acquisition device through wires, the voltage pulse generator is connected with the ultrasonic data acquisition device through a wire, and the ultrasonic data acquisition device is connected with a data processing center through a wire. An existing single-emitting and single-receiving detection mode is improved to a cycle single-emitting multi-receiving CT detection mode, and an ultrasonic wave speed CT image and an absorption coefficient CT image are adopted to reflect the coal dust concentration distribution, so the detection accuracy is improved.

Description

technical field [0001] The invention relates to an ultrasonic detection instrument, in particular to an ultrasonic-based dynamic detection system for mine coal dust concentration and a dynamic monitoring method for coal dust concentration. Background technique [0002] A large amount of coal dust will be produced during the tunneling of coal mine underground roadway and the mining of the working face, especially in the process of gas outburst, which will lead to a coal dust explosion accident under certain conditions, so the coal dust in the mine production space can be measured accurately and in real time Concentration is of great significance to the prevention and control of coal dust explosion accidents. [0003] When the ultrasonic wave penetrates the gas with dust or coal dust, its ultrasonic speed and sound intensity will change greatly. The change of ultrasonic velocity is due to the existence of coal dust particles in the gas, which makes the ultrasonic penetration ...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a dynamic detection system for coal dust concentration in mines based on ultrasonic waves and a dynamic monitoring method for coal dust concentration, which satisfies the detection method of image reconstruction through the single-shot and multiple-receive mode of circulating ultrasonic waves. Solved the problem of real-time detection of coal dust concentration distribution in mine space

Images