Introduction to anemometer features
An anemometer, as its name suggests, is an instrument that measures the speed of air flow. There are many types of it, and the most commonly used one at 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 sensing part. The concave surfaces of the empty cups are all oriented in one direction.
The entire sensing part is installed on a vertical rotating axis. Under the action of wind force, the wind cup rotates around the axis at a speed proportional to the wind speed.
Another type of rotating anemometer is the propeller anemometer, which consists of a three- or four-blade propeller as the sensing part;
Install it on the front of a weathervane so that it points in the direction of the wind at all times. 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 range of application.
It can be used not only for gases but also for liquids, and can be used in subsonic, transonic and supersonic flows of gases.
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 speed, it can also measure the pulsation value and turbulence amount; in addition to measuring the motion in one direction, it can also measure the velocity components in multiple directions at the same time.
6. Directly display the volume flow rate. Enter the cross-sectional area of the pipe to accurately calculate the volume flow rate.
7. The instrument has a time period or multi-point average calculation function for calculating average flow.
8. Can display the maximum value and minimum value, with reading retention function.
9. Calculate multi-point/time period average value, hold key, hold reading, with backlight.
10. Automatic shutdown function, protective soft cover, waterproof, dustproof and impact-proof.
