Wind test method:
       The wind speed (flow rate) test has an average wind speed test and a turbulent flow component (the wind turbulent flow is 1 to 150 KHz , which is different from the change)
test. The thermal anemometer tests the average wind speed. The methods for testing the average wind speed are thermal, ultrasonic, impeller, and leather.
Tow tube type, etc., but in these modes, the anemometer is based on the principle of heat dissipation. Below, the measurement of these wind speeds
The law makes a note.
 This method tests the wind speed by testing the change in resistance generated when the sensor is cooled by the wind while it is energized. Do not
Information that can give directions to the wind.
 In addition to being easy to carry, the cost performance ratio is high, and it is widely used as a standard product of an anemometer.
 Hot anemometers use platinum wire, electric thermocouples, and semiconductors, but our company uses platinum coils. Platinum line
The material is stable on the material. Therefore, long-term stability and advantages in temperature compensation.
Ultrasonic
 This method is to test the ultrasonic time of a certain distance, and the arrival time is delayed due to the influence of the wind, thereby testing the wind.
speed.
 At the 3rd power, you can know the wind direction.
 The sensor portion is large, and turbulence may occur around the test portion to make the flow irregular. Use is limited.
 Low popularity.
Impeller type
 This method is based on the principle of applying a windmill, and tests the wind speed by testing the number of revolutions of the impeller .
 For weather observation, etc.
 The principle is simple, the price is cheap, but the test accuracy is low, so it is not suitable for the test of micro wind speed and the change of small wind speed.
Test.
 Low popularity.
Leather tube
 On the front side of the flow surface, there are small holes formed at right angles thereto, and the inside is hidden from the respective holes.
The thin tube of force. The wind speed can be known by testing the pressure difference (the former is full pressure and the latter is static pressure).
 The principle is simple and the price is cheap, but it must be set at right angles with the flow surface, otherwise it cannot be correct.
test. Not suitable for general use.
 Not used as an anemometer, but as a wind speed correction for high speed domains .
This article from Wuhan Jin Zhifei purification equipment Limited.
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