Detection device and detection method for two-way wind speed and wind direction measurement

Abstract

The invention discloses a detecting device and method for bi-directionally measuring the wind speed and wind direction. The device comprises a micro differential pressure sampling probe, an automatic zero clearing assembly and a micro differential pressure component, wherein the micro differential pressure sampling probe comprises a pressure guiding pipe I and a pressure guiding pipe II both used for sampling, as well as an air outlet I and an air outlet II; the micro differential pressure component comprises a sampling opening I and a sampling opening II; the automatic zero clearing assembly comprises an interface I, an interface II and an interface III; the interface I and the interface III can be communicated or disconnected with the interface II in a switching manner. The device can realize bi-directional measurement when in use, is suitable for measuring wind speed and wind direction in occasions with extremely bad conditions such as coal mines, has strong capability of avoiding the influence of dust and water vapor, higher measuring precision and stability, the function of zero point calibration and a simple structure, is easy to process and assemble, has longer service cycle, and eliminates the lag nonlinear characteristic of the conventional pressure sensor after operation; the zero point variation of the device within the range from 0 DEG C to 40 DEG C is less than 0.1 Pa, and the stable measurement at 0.1 PA can be realized.

Description

technical field [0001] The invention relates to a safety auxiliary equipment suitable for underground coal mines, in particular to a detection device and detection method for two-way wind speed and wind direction measurement. Background technique [0002] Mine ventilation is to continuously send the surface air to the underground, and at the same time continuously discharge the dirty air from the underground to the outside of the mine. Mine ventilation is the basis of safe production in coal mines. It not only has the important function of transporting fresh air to various underground wind sites and ensuring the breathing of underground workers, but also has the functions of diluting, removing mine gas and dust, and cooling the operating area. Reasonable ventilation is an important means to restrain the development of natural coal and fire, but if the ventilation system is not properly arranged or managed properly, it will be the main reason for the accumulation of gas and s...

AI Technical Summary

Problems solved by technology

Most of the wind speed sensors in the prior art adopt the principle of ultrasonic vortex street, the measurement method is relatively simple, the use of equipment is relatively restricted, not flexible enough, and it cannot realize two-way wind speed and wind direction measurement, and the long-term work is easily affected by dust and water vapor, which affects the measurement accuracy; later appeared Sensors with differential pressure measurement principles, such as shrink tube wind speed sensors, still cannot achieve accurate measurement of two-way wind speed and wind direction; and the above sensors do not have the ability to automatically clear, but the inherent unconventional and multi-value corresponding hysteresis of the pressure sensor itself Non-linear characteristics and zero temperature drift characteristics limit its measurement accuracy

[0003] In the prior art, there has been an electronically controlled automatic zero-point calibration differential pressure sensor, such as the valve assembly disclosed in patent application 201180032464.5, which has the function of automatic zero-point calibration, but its structure is complex, and processing and assembly is extremely difficult, and this product is due to various The precision of cooperation between kinematic pairs is high, so extremely high sealing performance is required, otherwise it will fail when used in harsh conditions such as coal mines

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