Ultrasonic transverse wave-based lithosphere loosening early-warning system

Abstract

The present invention discloses an ultrasonic transverse wave-based lithosphere loosening early-warning system, which comprises a micro-controller module, an ultrasound transmitting module, an ultrasonic receiving module, a display module, an alarm module and a communication module. The ultrasound transmitting module, the ultrasonic receiving module, the display module, the alarm module and the communication module are connected with the micro-controller module. The micro-controller module comprises a timing unit, a first calculating unit, a second calculating unit, a comparison unit and a control unit. The ultrasound transmitting module comprises a high-voltage circuit, a pulse generating circuit and an ultrasonic transmission transducer, wherein the high-voltage circuit, the pulse generating circuit and the ultrasonic transmission transducer are sequentially connected. The ultrasonic receiving module comprises a noise filtering circuit, a received signal amplification circuit and a signal shaping circuit, wherein the noise filtering circuit, the received signal amplification circuit and the signal shaping circuit are sequentially connected. According to the invention, based on the relationships among the propagation speed of ultrasonic waves in the rock mass, the strained condition of the rock mass, and the fracture degree of the rock mass, the loose range of the surrounding rock mass can be monitored in real time. Therefore, the system is convenient, flexible, and easy to operate.

Description

technical field [0001] The invention relates to an ultrasonic ranging system, in particular to an ultrasonic shear wave-based early warning system for rock layer loosening, which belongs to the field of ranging. Background technique [0002] Ultrasound is a kind of mechanical vibration in elastic medium, which is caused by the vibration source in contact with the medium, and its frequency is above 20kHz. Since the speed of ultrasonic waves is much smaller than the speed of light, its propagation time is easier to detect, and it is easy to directional emission, with good directionality and good intensity control, so the use of ultrasonic ranging is very important in many distance detection applications. Including non-destructive testing, process measurement, robot measurement and positioning, and fluid level measurement, etc. [0003] The safety support of the roadway plays an important role in the safety production of coal mines, and it is also a difficult point in the safe...

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Problems solved by technology

However, the influence of temperature has not been considered and the measurement accuracy needs to be further improved

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