What are the features of an anemometer?
An anemometer, as the name suggests, is an instrument that measures air velocity. There are many types of it, and the most commonly used one in meteorological stations is the wind cup anemometer;
It consists of three parabolic cone empty cups fixed on the bracket at 120° to each other to form the induction part. The concave surfaces of the empty cups are all in one direction.
The entire induction part is installed on a vertical rotating shaft. Under the action of wind force, the wind cup rotates around the shaft at a speed proportional to the wind speed.
Another rotary anemometer is the propeller anemometer, which consists of a three-blade or four-blade propeller as the sensing part;
Install it on the front end of a wind vane so that it is aligned with the direction of the wind at any time. The blades rotate around a horizontal axis at a speed proportional to the wind speed.
Features of anemometer:
1. Small size, little interference to the flow field;
2. Wide application range.
It can be used not only for gas but also for liquid, and can be used in subsonic, transonic and supersonic flow of gas.
3. High frequency response, up to 1MHz.
4. High measurement accuracy and good repeatability. The disadvantage of the dedicated line anemometer is that the probe interferes with the flow field to a certain extent, and the dedicated line is easy to break.
5. In addition to measuring the average velocity, it can also measure the pulsation value and turbulence; in addition to measuring the single-directional movement, it can also measure the velocity components in multiple directions at the same time.
6. Directly display volume flow. Enter the cross-sectional area of the pipe, and the volumetric flow rate can be calculated accurately.
7. The instrument has a time period or multi-point average calculation function, which is used to calculate the average flow.
8. It can display the maximum value and minimum value, with reading hold function.
9. Calculate multi-point/time-period average value, hold key, hold reading, with backlight.
10. Automatic shutdown function, protective soft case, waterproof, dustproof, and impact-proof.
