Anemograph for coal mine

Abstract

The present invention relates to an anemograph for a coal mine, in particular to the anemograph which measures the wind speed by utilizing time difference of propagation of ultrasonic waves in air, has a measurement range to be the average wind speed on a propagation line, is more accurate in measurement and small in size, is convenient to install and operate, and has explosion-proof and waterproof functions. The anemograph comprises a display host, two ultrasonic transducers and a temperature, humidity and air pressure sensor, the two ultrasonic transducers are connected with the display hostthrough transmission cables respectively, and the temperature, humidity and air pressure sensor is connected with the display host through a transmission cable; the display host is composed of an anemograph generating and receiving circuit, a transmitting voltage adjusting circuit, a DSP signal processing circuit, an LCD displayer and key circuit, a data processor circuit, a receiving signal processing power circuit, a communication circuit and a power circuit, and the communication circuit exchanges data with the outside through a communication line and is in signal connection with the dataprocessor circuit.

Description

technical field [0001] The invention relates to the field of coal mine equipment, in particular to an anemometer which uses the time difference of ultrasonic waves propagating in the air to measure wind speed. Background technique [0002] Traditional mine wind speed measuring instruments include mine air volume sensor, mine two-way wind speed sensor, mine wind direction sensor, mine shrink tube wind speed sensor and mine two-way wind speed sensor. The principles are ultrasonic eddy current, ultrasonic, mechanical, Pressure-type and pressure-type pitot tubes, the initial wind speed of these traditional measuring instruments is 0.4m / s, the accuracy is ≥0.2m / s, and the resolution is ≥0.1m / s. It is not uniform. The traditional instrument measures the wind speed at a certain point on the section, which is not accurate enough; and the traditional measuring instrument is partly placed on the top during installation, so as not to affect passing people, vehicles, etc., and it is dif...

AI Technical Summary

Problems solved by technology

[0002] Traditional mine wind speed measuring instruments include mine air volume sensor, mine two-way wind speed sensor, mine wind direction sensor, mine shrink tube wind speed sensor and mine two-way wind speed sensor. The principles are ultrasonic eddy current, ultrasonic, mechanical, Pressure-type and pressure-type pitot tubes, the initial wind speed of these traditional measuring instruments is 0.4m / s, the accuracy is ≥0.2m / s, and the resolution is ≥0.1m / s. It is not uniform. The traditional instrument measures the wind speed at a certain point on the section, which is not accurate enough; and the traditional measuring instrument is partly placed on the top during installation, so as not to affect passing people, vehicles, etc., and it is difficult to measure the wind speed. Typically, the obtained wind speed is not accurate enough, and it is even more difficult to calculate the air volume through the wind speed

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