Anemometer based on PVDF sensor

Abstract

The invention provides a wind speed measurement instrument based on PVDF sensors. The measurement instrument comprises a cable fixed portion, the PVDF sensors, a connecting component and PC boards, wherein the cable fixed portion is fixed to a cable through the connecting component, the PVDF sensors are arranged on the PC boards and inserted in grooves of the cable fixed portion, the PVDF sensors are arranged on the upper side, the lower side, the left side and the right side perpendicular to the radial direction respectively, and the wind speed and the wind direction nearby the measured cable are obtained by collecting and processing data through the four sensors. The wind speed measurement instrument can be mounted on and dismounted from the cable, and local information of the wind speed of the cable is known conveniently and flexibly; the PVDF sensors are used and have better consistency in the frequency measuring aspect; the vortex shedding frequency is measured through the PC boards, the capability to adapt to the environment is high, and the PVDF sensors are protected at the same time; information such as the magnitude of wind pressure borne by the cable can be provided, and reliable bases are provided for analysis of waving stress of the cable.

Description

technical field [0001] The invention relates to anemometer technology, in particular to an anemometer based on a PVDF (polyvinylidene fluoride piezoelectric polymer) sensor, which can help to understand the force of the cable when the cable is galloping. Background technique [0002] Conductor galloping is a self-excited vibration phenomenon with low frequency (0.1-3.0Hz) and large amplitude (about 20-300 times the diameter, up to 10m) generated by wind excitation due to the eccentricity of the conductor after it is covered with ice. . Under the corresponding atmospheric conditions, conductor galloping often occurs, and due to its large amplitude and long duration of swing, conductor galloping can easily cause phase-to-phase flashover, damage to hardware, cause line tripping, power outage or burn conductors, tower collapse, conductor breakage, etc. Serious accidents have caused major economic losses and caused great harm to the operation safety of transmission lines. Our c...

AI Technical Summary

Problems solved by technology

Common wind speed measurement methods are: mechanical wind speed sensor (propeller type and wind cup type wind speed sensor, such as the Chinese patent application number CN201310176418.3), which is characterized by simple structure, easy to use, and strong adaptability to the environment, but there are rotating parts , easy to wear, and the rotational inertia will reduce the response wind speed; the thermistor type wind speed sensor (such as the Chinese patent with the application number CN201310107907.3), is characterized by easy use and low price, but each thermistor cannot be guaranteed during use. Its dynamic performance is exactly the same, and the environment will also affect its accuracy; the CMOS integrated wind speed sensor (Chinese patent application number CN 201010103608.9) is characterized in that it can measure wind speed and wind direction at the same time, but the measured wind speed has a small range and is resistant to Poor corrosion performance; etc.

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