Automatic reset differential pressure module and method for measuring wind speed and wind direction

Abstract

The invention discloses an automatic reset differential pressure module and a method for measuring wind speed and wind direction. The module comprises an automatic reset component and a micro differential pressure element; the micro differential pressure element is provided with a sampling port I and a sampling port II; the automatic reset component is provided with an interface I, an interface II and an interface III; the interface I and the interface III can be in communication with the interface II through an electrical controlled and driven switching way, or be closed; a detection device in the invention adopts the structure of the automatic reset component, and is suitable for measuring the wind speed and the wind direction in extremely poor working conditions such as in coal mine and the like, the measuring accuracy and the stability are higher, a zero point calibration function is achieved, the structure is simple, the processing and the assembling are easy, the using period is longer, the use cost is saved, the nonlinear property of delaying after full range work of a diffused silicon pressure sensor is eliminated, the use proves that zero point variation is less than 0.1 Pa within the range of 0 to 40 DEG C, and stable measuring of 0.1 Pa can be achieved.

Description

technical field [0001] The invention relates to a safety auxiliary equipment suitable for underground coal mines, in particular to a differential pressure module with automatic zero reset and a method for detecting wind speed and wind direction. 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 accum...

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 single, the use of equipment is relatively restricted, and it is not flexible enough. It is easily affected by dust and water vapor during long-term work, which affects the measurement accuracy; sensors with differential pressure measurement principles appear later, such as The shrink tube wind speed sensor still cannot achieve accurate measurement of two-way wind speed and wind direction; and the above-mentioned sensors do not have the ability of automatic zeroing, but the pressure sensor itself is inherently unconventional, multi-value corresponding hysteresis nonlinear characteristics and zero temperature drift characteristics, limits 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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