Analysing the causes of anemometer errors
Anemometer is still a relatively common piece of equipment instruments, right, but in our operation will often appear some measurement errors, why this situation? I believe that many people will appear this question, today I will give you a popularity of the anemometer most of the reasons for the measurement error is the following parts
Installation error
As the anemometer belongs to the field use of instruments, the use of environmental conditions compared with the laboratory is far away. From the working principle of the instrument, it can be seen that before calibration, the rotating shaft of the wind speed sensor and the anemometer's coupling need to be connected with a hose, and the sensor's rotating shaft is required to be strictly concentric with the instrument's rotating shaft, if there is an eccentricity of the top and bottom left and right after installation, the rotating torque of the coupling can not be transferred to the rotating shaft of the wind speed sensor, which is easy to form the rotating inflexibility, and thus bring errors to the measurement results. Therefore, it is necessary to repeatedly adjust its concentricity during installation, and then start the calibration work after adjustment.
Error caused by unstable wind speed
Caused by the circuit principle, if the anemometer display data is not stable, the data will be recorded, will bring errors to the measurement results. In order to overcome this error, the wind speed value must be adjusted, to be recorded after the data shown on the display of the calibrator is stable, and the stabilisation time is not less than 2min.
Third, the error caused by calibration parameters
The same wind speed sensor has a different wind speed equation, so there are different calibration parameters, with a standard calibration of different types of wind speed sensors, different wind speed sensors must be corrected parameters. When calibrating, it should be noted that the dial of anemometer should be used to input the relevant calibration parameters and check whether the display value of the calibrator corresponding to the calibration parameters is correct or not, if the display value is correct, then the calibration work can be carried out, or else it will produce measurement errors.
Translated with DeepL.com (free version)
