Method and device for measuring ultrasonic wave coal wall temperature

Abstract

The invention relates to an ultrasonic coal wall temperature measurement method and a device thereof. An ultrasonic sensor is arranged at a designated point of a coal mine, a single-chip microcomputer circuit is utilized to control the ultrasonic sensor to transmit ultrasonic signals, and the sensor also receives the reflected signals and triggers the external interrupt of a single-chip microcomputer by an ultrasonic receiving circuit to obtain the time of flight of the ultrasonic signals between the round trip. On the premise of knowing the coal wall distance, data are processed by the single-chip microcomputer according to a gas constant and an adiabatic exponent of the signal flight environment to obtain the measurement result of the coal wall temperature, and the result is displayed by a digital display. The measurement device is composed of the ultrasonic sensor, the single-chip microcomputer circuit, the ultrasonic transmitting circuit, the ultrasonic receiving circuit and the digital display. The ultrasonic sensor is connected with the ultrasonic transmitting circuit and the ultrasonic receiving circuit simultaneously, an external interrupt port of the single-chip microcomputer circuit is connected with the ultrasonic receiving circuit, and an output interface of the single-chip microcomputer circuit is connected with the digital display.

Description

technical field [0001] The invention relates to a temperature measuring device, in particular to an ultrasonic coal wall temperature measuring method and device. Background technique [0002] The existing temperature measurement methods can be mainly divided into two types, one is contact type and the other is non-contact type. Contact measurement requires long enough contact to reach thermal equilibrium. This method often destroys the thermal equilibrium state of the measured object and is eroded by the measured medium. Therefore, there are strict requirements on the structure and performance of the temperature sensing element, and this method is not conducive to the measurement of coal wall temperature. The characteristics of the non-contact method of temperature measurement are: no contact with the measured object, and no change of the temperature distribution of the measured object. The high concentration of coal dust makes the infrared receiving measurement have large...

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Problems solved by technology

Therefore, there are strict requirements on the structure and performance of the temperature sensing element, and this method is not conducive to the measurement of coal wall temperature

The characteristics of the non-contact method of temperature measurement are: no contact with the measured object, and no change of the temperature distribution of the measured object. The concentration of coal dust is high, so that there is a large error in the infrared receiving measurement, and accurate measurement cannot be performed

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