Assuming that the outside wind speed u does not change, the relative speed v of the i-th wind speed and air is:
v = u – 2πnRcosθi
Where n is the rotational speed of the cup, R is the radius of the cup to the axis of rotation, and iθ is the angle of intersection of the airflow with the normal direction in the cup.
How to measure the wind speed in the room, how to connect with the sensor?
There is likewise wind speed in the room? ! I have ever seen such an application. Whoever gives you the 2 13 questions, the pipeline wind speed is still similar, generally in the ordinary floor, 30M / S is enough!
How high is the wind direction wind speed sensor of the automatic weather station?
10.5 meters from the bottom of the pole to the center of the wind speed sensor
What types of wind gauges (wind speed sensors) are on wind turbines?
Mechanical wind gauges, usually speaking, wind cup anemometers, hemispherical cups, conical cups, low wind speed hemispheres, high wind speed, relatively good cones. Both of these are vertical horizontal planes, as well as the horizontal axis of a small wind-lift truck. There are not many users on the wind power, it is appropriate for the harsh environment, corrosion, low temperature or something. The accuracy is usually around 0.5m/s. If the starting torque is large, the wind is too small to measure. Usually, the range is between 3-50-70m/s. It is only possible to assess the wind speed in one direction, usually in the horizontal direction. The test data has a great deal to do with the level of installation. If the installation is not level, the basic data is completely abolished, of course, it can be rectified.
Ultrasonic wind meter, the accuracy is 0.1m / s is no problem, 0-100m / s can be used to measure, 3 dimensions can be measured simultaneously. The sampling speed is no problem. The price is not cheap and can be utilized to a long time.
The current fan half of the cabin has an ultrasonic hemisphere cup plus a wind vane.
There are also site measurements, laser and ultrasound. The laser wind gauge can be placed directly on the ground, and the data of 0-200m high altitude can be recorded in one time, and the three-dimensional flow field is no problem. Half of the valuable equipment are directly removed after the test. No one dares to use it in the wilderness
The ultrasonic wind speed sensor outputs digital signal or an analog signal. What interface circuit should be used?
Input and output are analog signals, and the inside of the sensor is a digital signal, which is determined by hardware.
There are many kinds of interface circuits: impedance conversion circuit, amplification circuit, current voltage conversion circuit, bridge circuit, frequency voltage conversion circuit, charge amplifier, RMS conversion circuit, filter circuit, linearization circuit, logarithmic compression circuit.
The measured value of the wind speed sensor always shows 30M/s.
Countless friends often encounter a problem when using the wind speed sensor. The measured value of the sensor is only shown in a fixed number in the terminal system, such as 30M/s, then the measured value of the wind speed sensor always shows 30M/s. what does it mean?
The current wind speed is 30 meters per second. There may be measurement errors or the sensor is divided.
What is the meaning of writing 0.2m/s on the wind speed sensor?
The speed of the air (the speed of the wind) is how many meters per second.
Start at 0.2 m/s, possibly below this wind speed, the sensor will not work.
Is there a sensor that senses the direction and size of the wind?
Find out how much wind you are measuring. If the wind speed is relatively unimportant, you need to use a hot wind speed direction sensor or an ultrasonic wind speed head direction sensor. If the wind speed is relatively large, you can use a wine cup type sensor to measure with a wind vane.
The above three sensors can simultaneously output the wind speed and the wind direction. The wind direction measured by the ultrasonic and thermal sensors is three-dimensional, and the wind direction measured by the wind vane is two-dimensional.
In addition, if wind direction output is not required, a universal hot wind speed sensor can be used, which has no direction output, but it can be measured regardless of the direction of the wind.
Can the sensor wire of the wind speed alarm be extended?
Can.
The anemometer consists of a microprocessor and a highly dynamic wind sensor that can observe instantaneous wind speed in the atmosphere and the average wind speed in two minutes and ten minutes. It has wind speed alarm setting and alarm output control function; wind speed alarm The instrument adopts dual-screen display output, the wind speed display adopts high-brightness LED digital tube display, and the observation distance is long, and it is suitable for dark light and nighttime use. The parameter setting adopts graphic liquid crystal LCD display, and the human-machine interface is friendly; the wind speed alarm device comes with Sound and light alarm, when the wind speed exceeds the limit, the alarm will sound and light alarm to remind the operator to pay attention to safety and generate a relay switch output.
How to transfer the data of the wind direction wind speed sensor to the PLC (Siemens 7200) to control the rotation of the motor to realize the wind rotation of the flagpole
Mainly look at the output of the wind direction sensor. If you can integrate the output into 4-20mA current or 0-10V voltage, you can directly connect to the analog input port of the PLC. According to the response curve, the wind direction and wind speed can be obtained.
Wind Sensor 