Mine coal dust concentration dynamic detection system and coal dust concentration dynamic monitoring method

Abstract

The invention discloses a mine coal dust concentration dynamic detection system and a coal dust concentration dynamic monitoring method based on ultrasonic waves. Sixteen ultrasonic sensors are fixed on the inner wall of the inner ring at equal angles. Function; all signal lines are connected to the multi-core plug fixed on the outer ring, the multi-core plug is connected to a program-controlled multi-way switch through a multi-core shielded cable, and the program-controlled multi-way switch is connected to the voltage pulse generator, ultrasonic The data acquisition device is connected to the circuit, the voltage pulse generator is connected to the ultrasonic data acquisition device, and the ultrasonic data acquisition device is connected to the data processing center circuit. The current single-shot and single-receipt detection method is improved to the circular single-shot and multiple-receive CT detection mode, and two images of ultrasonic velocity CT and absorption coefficient CT are used to reflect the distribution of coal dust concentration, which improves the accuracy of detection.

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 ...

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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

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