Working principle of wind cup type wind direction anemometer
Wind direction:
The wind direction is supported by a protective ring that protects the wind cup. Composed of a wind vane, wind direction axis, and wind direction dial, a magnetic compass is composed of a magnetic rod installed on the wind direction dial and a wind direction dial to determine the direction of the wind direction. When rotating the tray nut under the wind direction dial casing, the tray lifts or lowers the wind direction dial, causing the tapered bearing to leave or contact the shaft tip. The wind direction indication is determined by the stable position of the wind direction pointer on the wind direction dial.
2 Wind speed section
The wind speed sensor adopts a traditional three cup rotating frame structure. It linearly transforms the wind speed into the rotational speed of the rotating frame. In order to reduce the starting wind speed, a lightweight plastic air cup is used, supported by tapered bearings. There is a toothed blade fixed on the shaft of the rotating frame. When the rotating frame rotates with the wind, the shaft drives the blade to rotate. The toothed blade continuously cuts the beam of light in the optical path of the photoelectric switch, thereby linearly converting the wind speed into the output pulse frequency of the photoelectric switch. The microcontroller inside the instrument samples and calculates the output frequency of the wind sensor. The instrument outputs instantaneous wind speed, one minute wind speed, instantaneous wind level, one minute wind level, and wave height corresponding to the average wind level. The measured parameters are displayed digitally on the instrument's LCD display.
In order to reduce the power consumption of the instrument, sensors and microcontrollers in the instrument have taken some special measures to reduce power consumption.
In order to ensure the reliability of the data, the instrument also comes with a power voltage detection circuit. When the power supply is below about 3.3V, the instrument display shows "undervoltage", indicating that the user's power supply voltage is too low and the data is unreliable. The battery should be replaced in a timely manner.
The instrument is also designed with a power control circuit, which replaces mechanical switches to control the power on and off of the instrument.
