Anemometer, calibration device and calibration method based on low-frequency AC discharge

Abstract

The invention discloses an anemometer based on low-frequency AC discharging, which comprises AC numerical-control adjustable excitation, a negative feedback coupling circuit module, a wind speed probe module and a data acquisition and processing module in serial connection sequentially, wherein the AC numerical-control adjustable excitation is used for continuously and accurately outputting needed AC discharging voltage; the negative feedback coupling circuit module is connected between the AC numerical-control adjustable excitation and the wind speed probe module for providing an effective negative feedback for controlling the discharging development process; and the data acquisition and processing module is used for acquiring the serial loop current and displaying the discharging loop current waveform and the loop current effective value. the anemometer can accurately measure the wind speed in the air, and the problems that the former anemometer is poor in measurement precision, is likely to be influenced by the temperature and is small in wind speed measurement range can be solved. The invention also discloses a device and a method of calibrating the anemometer based on low-frequency AC discharging, and thus, the corresponding relationship between the wind speed value and the current effective value of the AC discharging loop can be calibrated.

Description

Technical field [0001] The invention belongs to the technical field of fluid measurement, and particularly relates to an anemometer based on low-frequency alternating current discharge, and a calibration device and a calibration method for the anemometer. Background technique [0002] Wind speed measurement is a subject worthy of long-term research and exploration, and it has been widely used in many fields such as aviation, aerospace, meteorology and military. Early anemometers included rotor or cup-type mechanical anemometers. Later, pitot tube anemometers and piezoelectric anemometers appeared. However, due to their large size, poor measurement accuracy, susceptibility to temperature, and small wind speed measurement range, these anemometers cannot meet application requirements such as miniaturization, high accuracy, and high temperature and high speed measurement environments. Therefore, researchers try to use new measurement techniques to accurately and reliably measure dif...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an anemometer based on low-frequency AC discharge, which can accurately measure the wind speed in the air, so as to solve the problems of poor measurement accuracy, easy to be affected by temperature, and small wind speed measurement range of the previous anemometer, and can be widely used Used in many fields such as aviation, aerospace, meteorology and military

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