Wind speed and direction measurement are important components of meteorological monitoring. Measuring wind speed and direction has a positive impact on human beings to better research and use wind energy and improve life production. In agricultural and meteorological testing, wind speed is a very important parameter, and thus the wind anemometer has become a universal measurement tool. Wind speed and direction recorder contains two sensors, wind direction sensor and wind speed sensor. The two sensors can work simultaneously to determine the wind direction and wind speed parameters.
The wind sensor of the wind speed sensor is a three-cup type wind cup assembly. When the wind speed is greater than 0.4m/s, rotation occurs and the signal conversion circuit is a Hall IC. Driven by the horizontal wind, the wind cup group rotates, the magnetic rod disk is driven to rotate by the main shaft, dozens of small magnets on it form several rotating magnetic fields, and the pulse signal is induced by the Hall magnetic sensitive element, and its frequency increases with the wind speed. Large and linear increase. Calculation formula: V = 0.1F; V: wind speed, unit: m/s; F: pulse frequency, unit: Hz; the wind sensor of the wind direction wind direction recorder is a single plate wind vane with an auxiliary target at the front end. The angle transformation uses a seven-bit gray code photoelectric encoder. When the wind vane rotates with the wind, the spindle drives the encoder to rotate. Each rotation of 2.8125°, the seven groups of light emitting and receiving optoelectronic devices located on the upper and lower sides of the encoder disc generate a new set of seven parallel Gray codes, which are shaped and inverted. After the output. The azimuth-angle-gray code-binary code comparison table is an important basis for the programming of wind direction measurement microcontrollers.
In general, the two sensors of wind speed and direction recorder have the characteristics of good dynamic performance, high linear accuracy, high sensitivity, wide measuring range, good interchangeability, and large wind resistance. Here we briefly introduce some of the main performance and technical parameters of the wind speed and direction recorder. The wind anemometer has three modes of manual, automatic and computer lock, users can set the three modes according to their needs. Data storage is powerful and can store up to 60,000 data. The wind anemometer has a 32-channel simultaneous detection function, which can achieve multi-point synchronous detection. The main parameters of the wind anemometer are: wind direction: 0-40m/s; accuracy: ±0.6m/s; resolution: 0.1m/s; starting wind speed: ≤0.5m/s; stability: <0.2m/ s/yr; wind speed range: 0-360 degrees; accuracy: ± 0.6 degrees; resolution: 0.1 degrees.
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