Low-speed wind-direction and wind-speed direct measuring instrument

Abstract

The invention discloses a low-speed wind-direction and wind-speed direct measuring instrument which comprises a thermistor, a power module, a constant power control circuit, a MCU, a wind vane, a rotary encoder, a three-dimensional magnetoresistive sensor, a double-axis tilt angle sensor, and a display module. The MCU is electrically connected to the power supply module, the rotary encoder, the three-dimensional magnetoresistive sensor, the double-axis tilt angle sensor and the display module. The thermistor is electrically connected to the MCU through the constant power control circuit. During working, according to the data measured by the three-dimensional magnetoresistive sensor and the double-axis tilt angle sensor, the magnetic azimuth of the earth is calculation, combined with the rotation angle of the wind vane, a wind direction is calculated, and a wind speed is calculated according to the resistance value of the thermistor at the same time. The low-speed wind-direction and wind-speed direct measuring instrument has the advantages of a simple structure and convenience in use, the wind speed and wind direction can be directly read, the manual reading is not needed, and the reading is accurate.

Description

technical field [0001] The invention relates to the field of wind direction and wind speed measurement, in particular to a low-speed wind direction and wind speed direct-reading measuring instrument. Background technique [0002] There are usually three methods for measuring wind speed: thermal probe, impeller probe and pitot tube. [0003] In the measurement range of flow velocity from 0 to 100m / s, it is divided into three sections: [0004] Low speed: 0 to 5m / s; [0005] Medium speed: 5 to 40m / s; [0006] High speed: 40 to 100m / s. [0007] The thermal probe of the anemometer is used for accurate measurement of 0 to 5m / s; the impeller probe of the anemometer is ideal for measuring the flow velocity of 5 to 40m / s; and the best results can be obtained in the high speed range by using the pitot tube. [0008] Thermal probes (hot bulb, heat sensitive, hot wire) have the most accurate measurement results, and the wind speed range is generally 0-30m / s. [0009] The thermal p...

AI Technical Summary

Problems solved by technology

[0017] Existing wind direction and anemometers are generally more complicated, and require manual reading, with low accuracy