The wind speed sensor is an instrument used to measure the wind speed. It can continuously measure the wind speed and air volume. It is an important monitoring device for meteorological monitoring. The purpose of collecting wind speed information is achieved through a mechanical anemometer or an ultrasonic anemometer. The shape is small and exquisite, it is very easy to carry, the measurement method is simple, and it can be disassembled and assembled anytime, anywhere.
Compared with other sensors, the wind speed sensor has a lower price, so it has been widely used. Now the common material is aluminum alloy material or polycarbonate composite material. Because it works outdoors for a long time, the wind speed sensor has uniform characteristics: waterproof and windproof, corrosion resistance, anti-aging, high safety, and accurate measurement.
The main categories of wind speed sensors:
Pitot tube wind speed sensor, hot wire wind speed sensor, ultrasonic wind speed sensor, Hall effect electromagnetic wind speed sensor.
Ultrasonic wind speed sensor.
As the name implies, the ultrasonic trial and error method is used to measure the wind speed. In a fixed measurement environment, if the propagation direction of the ultrasonic wave corresponds to the wind direction, the faster the wind speed is, the faster the ultrasonic wave propagates. will also slow down.
The components of the propeller wind speed sensor are: the propeller blade, the sensor shaft, the sensor bracket and the magnetic induction coil, etc. The sensor is placed outdoors. When the air flows, it will generate kinetic energy, which will drive the propeller of the sensor to rotate. Velocity gives the flow rate of the air.
Pitot tube wind speed sensor
This kind of measuring instrument is rare in the market. It was invented by the French physicist H. Pitot in the 18th century. It also appears when measuring the speed of rivers.
This method of measurement itself has limitations. It cannot measure the flow of fluid with particles. Even if the measured fluid contains only a small amount of particles, it may block the measurement hole. Therefore, this principle can also be used to measure the wind speed and air volume. Measurement.
Hot Wire Wind Speed Sensor
The hot wire wind speed sensor mainly uses a hot wire or a hot film as a probe to measure directly in the air, connect it with a Wheatstone bridge, and use the resistance or current balance relationship of the Wheatstone bridge to obtain a different test section. Air velocity.
Hall Effect Electromagnetic Wind Speed Sensor
Hall-effect sensors are mainly used in commercial fields, such as DVDs, CDs, memory drives, automatic toys, mobile phones, industrial rotating equipment, position detectors, and even military or aerospace equipment. Hall-effect sensors will appear.
The principle of the Hall effect sensor is actually that when the magnetic field passing through a piece of material at a certain angle affects the current flowing in the piece of material, a Hall voltage will be generated. To put it simply, it is a kind of three-cup wind speed sensor, but it is different from the traditional three-cup wind speed sensor, which uses the Hall effect for measurement.