Wind speed alarm system device of ventilation cabinet

Abstract

The invention discloses a wind speed alarm system device of a ventilation cabinet. The device comprises a connecting column and a connecting base, wherein the connecting base is installed at the upperend of the connecting column, a wind speed monitoring host is arranged at the upper end of the connecting base, an auxiliary mounting and reinforcing device is connected to the outer portion of the circumference of the center of the connecting column in a sleeving mode, and the novel auxiliary mounting and reinforcing device is additionally arranged outside the circumference of the center of theconnecting column of the wind speed alarm system device of the ventilation cabinet, so that the novel auxiliary mounting and reinforcing device can play an auxiliary mounting role when the wind speedmonitoring host is mounted in a ventilation pipeline of the ventilation cabinet, after the wind speed monitoring device is mounted in the ventilation pipeline, the auxiliary mounting and reinforcing device can also play a role in reinforcing the mounted wind speed monitoring device through the outward tightening pressure generated by the auxiliary mounting and reinforcing device, and in this way,the auxiliary mounting and reinforcing device can generate auxiliary mounting and auxiliary reinforcing effects on the wind speed monitoring device when and after the wind speed monitoring device is mounted.

Description

technical field [0001] The invention belongs to the related technical field of fume hoods, and in particular relates to a wind speed alarm system device on the surface of a fume hood. Background technique [0002] A wind speed and direction measuring instrument that uses the sending of sound wave pulses to measure the time or frequency (Doppler transform) difference at the receiving end to calculate the wind speed and wind direction is also called an ultrasonic anemometer. The wind-measuring instrument is made of the principle that the propagation speed in wind speed changes with the wind speed. Two pairs of acoustic pulse transmitters and receivers are usually placed at two points at a distance d. The propagation time t2 is fast, if the speed of sound is c, the wind speed component in the direction of the sound pulse transmitter and receiver, that is, the wind speed component is proportional to the time difference between the sound wave propagating with the wind and against...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of fume hood surface wind speed alarm system device, to solve the above-mentioned background technology because the wind speed monitor that monitors wind speed in the fume hood wind speed alarm system device always needs to be affected by wind blowing when working However, long-term exposure to the wind will easily cause the w

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