Wind speed is the distance the wind flows in a given amount of time, and wind force is the amount of force the wind has when it blows on an object. Wind speed is not graded; it's wind force that is graded, and wind force is generally graded based on wind speed. Generally speaking, the smaller the wind speed and the lower the wind level, the weaker the wind's destructive power; conversely, the larger the wind speed and the higher the wind level, the stronger the wind's destructive power.

1. Why measure wind force and wind speed?

Wind speed and wind force are important indices analyzed by the Meteorological Office and key factors they pay attention to. It not only has a great influence on people's daily life, but also has an important significance to the Meteorological Bureau's research, sea voyage and other work,. Therefore, early measurement of wind speed and wind direction can help the smooth implementation of various social activities.

2. What are the ways to measure wind speed and direction?

According to the principle of measurement, we will explain the following ways: traditional measurement, mechanical measurement, ultrasonic measurement and so on.

Traditional Measurement Methods

1. Wind Direction Measurement: Use of Wind Vane

The wind direction arrow of a wind vane points to which direction the wind is blowing. When the wind vane makes an angle with the path of the airflow, the airflow will cause a pressure on the tail of the wind vane. Its size is proportional to the projection of the geometric shape of the wind vane on the vertical plane of the airflow direction. The head of the wind vane has a small windward area and the tail has a large windward area. The wind pressure caused by this pressure difference causes the vane to rotate around the vertical axis until the vane is parallel to the airflow. The direction of the wind can be easily observed from the relative position between the vane and the fixed main bearing indicator pole.

2. Wind Speed Measurement: Use an Anemometer for Wind Speed Measurement

Using digital anemometer, it can also detect wind temperature, wind volume, wind power level, wind direction angle, minimum and maximum average wind speed measurement, minimum and maximum average wind volume measurement, and also support data storage. The anemometer is externally connected to a retractable six-wheeled wind blade design for more sensitive and accurate sensing.

The application of anemometer is widely used in all fields can be flexibly used, which is widely used in electric power, iron and steel, petrochemical, energy saving and other industries, there are other applications in the Beijing Olympic Games, sailing competitions, rowing competitions, field shooting competitions and so on need to use the anemometer to measure. Anemometer is more advanced, in addition to measuring wind speed, but also can measure the wind temperature, wind volume. There are many industries need to use anemometers, recommended industries: fishing industry, all kinds of fan manufacturing industry, the need for exhaust system industry and so on.

Mechanical Measurement

Mechanical sidetracking is like wind meter wind measurement, which looks like a mechanical watch in appearance. It is usually used to measure the wind in a shaft. Firstly, the wind speed needs to be estimated, then the wind vane and stopwatch are used to zero the anemometer pointer and stopwatch, and then the anemometer is made to face the wind flow and be perpendicular to the direction of the wind flow. After the wind meter has been idle for 30 seconds, turn on the anemometer and stopwatch switches at the same time and start the measurement. It should be noted that the number of wind measurements on the same section should not be less than three, and the wind measurement process should be carried out smoothly. For example, wind speed and direction sensors use common mechanical wind measurement methods to better utilize wind power generation and support the development of new energy wind power generation technology.

Ultrasonic Velocimetry

The principle of ultrasonic wind measurement is to realize the measurement of wind speed and direction through the ultrasonic time difference method. Due to the propagation rate of the sound in the gas, it will be superimposed on the velocity of the airflow in the direction of the wind. If the propagation path of the ultrasonic wave is the same as the wind direction, its speed will be accelerated; on the contrary, if the propagation path of the ultrasonic wave is opposite to the wind direction, its speed will be slowed down. Thus, the rate of ultrasonic wave propagation through the air corresponds to a function of the wind speed for a fixed set of measurement conditions. The wind direction and speed can be calculated.