The wind direction anemometer is a measuring instrument that converts the driving force of wind energy into an electronic signal and converts it into a digital display result. At present, the common wind direction anemometer is mainly composed of a sensor and a host. The sensor is used to sense the change of wind, direction The host transmits relevant information, and the host processes the information and outputs the result. The wind direction and anemometer are used to measure the wind direction and wind speed, which is convenient, fast and easy to carry. Therefore, the instrument is widely used in various industries. However, in the process of using the wind direction anemometer , some users report that the wind direction anemometer will have measurement errors. What is the reason? Here is a brief analysis.
1. Installation error Because the wind direction anemometer belongs to the instrument used on site, the environmental conditions during use are far from the laboratory. According to the working principle of the instrument, before the calibration, the rotation shaft of the wind speed sensor and the coupling of the wind direction anemometer need to be connected with a hose, and the rotation axis of the sensor and the rotation axis of the instrument are strictly concentric. If installed, there are up and down If left and right are eccentric, the rotating torque of the coupling cannot be fully transmitted to the rotating shaft of the wind speed sensor, which is easy to form inflexible rotation, thereby causing errors in the measurement results. Therefore, the concentricity should be adjusted repeatedly during installation, and the calibration work should be started after adjustment.
Second, the error caused by unstable wind speed is caused by the circuit principle. If the data displayed on the display of the wind direction anemometer is still unstable, the data will be recorded, which will bring errors to the measurement results. In order to overcome the influence of this error, after the wind speed value is adjusted, the data displayed on the display screen of the verifier must be stabilized before recording, the stabilization time is not less than 2min.
Third, the error caused by the calibration parameters The same wind speed sensor has different wind speed equations, so there are different calibration parameters. To calibrate different types of wind speed sensors with one standard, the parameters of different wind speed sensors must be corrected. When performing calibration, pay attention to use the dial of the wind anemometer to enter the relevant calibration parameters, and check whether the display value corresponding to the calibration parameter is correct. If the displayed value is correct, the calibration work can be carried out, otherwise measurement will occur error.
Different models of instruments may cause different causes of errors in the wind direction and anemometer. Therefore, if there are problems during use, you can contact a professional in time. In addition, you must strictly follow the requirements during use to avoid Errors caused by this and possible instrument malfunctions.
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