Capacitance type wind speed and wind direction transducer

Abstract

The invention discloses a capacitance type wind speed and wind direction transducer. The capacitance type wind speed and wind direction transducer comprises a substrate (1), an insulator (2) arranged at the surface of the substrate (1), a first capacitor bottom electrode (3) and a second capacitor bottom electrode (4) which are respectively arranged at the surface of the insulator and are separated by a certain distance, a supporting anchor area (5) connected with the insulator (2), an elastic film (6) connected with the supporting anchor area, a rigid sheet (7) connected with the elastic film and a wind rod (8) arranged on the rigid sheet (7). The wind rod (8) is arranged at the center of the rigid sheet (7), the first capacitor bottom electrode (3) and the second capacitor bottom electrode (4) are symmetrically arranged relative to the center of the rigid sheet (7), and the first capacitor bottom electrode (3) and the second capacitor bottom electrode (4) constitute differential capacitor pair. The capacitance type wind speed and wind direction transducer has the advantages of being high in detection sensitivity, low in power dissipation, small in size and temperature excursion and the like.

Description

technical field [0001] The invention relates to a structure of a capacitive wind speed sensor, in particular to a structure of a small wind speed sensor which adopts capacitance differential output to realize wind speed measurement. Background technique [0002] Wind speed and direction sensors are widely used in environmental monitoring and field operations. This type of sensor generally consists of a traditional wind cup and vane structure, a pure solid-state hot wire or hot film structure, and an ultrasonic wind speed measurement system. Traditional wind cups and wind vanes have large structures, generally tens of centimeters or more, and there are rotating parts that are easy to wear; although thermal wind speed sensors can be made very small, temperature drift and power consumption are inherent problems. Improvement: The ultrasonic wind speed sensor has been greatly developed in recent years. The sensor has many outstanding advantages such as high precision, large meas...

AI Technical Summary

Problems solved by technology

Traditional wind cups and wind vanes have large structures, generally tens of centimeters or more, and there are rotating parts that are easy to wear; although thermal wind speed sensors can be made very small, temperature drift and power consumption are inherent problems. Improvement; the ultrasonic wind speed sensor has been greatly developed in recent years. The sensor has many outstanding advantages such as high precision, large measurement range, and long service life.

The downside is the larger size (over 10 cm) and the higher price

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