How to define fan speed and how to measure it?
A blower, also known as a ventilator, is a motor that utilizes a rotating impeller, and modern blowers are electric motors that convert electrical energy into kinetic energy of the air. Blast technology is to blow a certain pressure of air into the furnace to fully burn the fuel, increase the furnace temperature, and improve the smelting efficiency. Blast equipment is the material basis for the implementation of blast technology. Nowadays, among all kinds of mechanical and electrical equipment in various industries in China, the motors matched with fans account for about 60% of the country's installed motor capacity, and the power consumption accounts for about one-third of the country's total power generation. Below, Xiaobian from Gongcai.com will share with you how the wind speed sensor calculates the wind speed of the blower?
The air volume of the fan is defined as: the product of the wind speed V and the cross-sectional area F of the air duct. Therefore, the calculation of the air volume is also very simple, and the air volume can be calculated directly by using the formula Q=VF. Large wind turbines can accurately measure the wind speed with an anemometer. In order to improve the accuracy of blower wind speed, it is recommended to use ultrasonic wind speed sensor. Ultrasonic wind speed sensor is a fully digital signal detection instrument, which can calculate the wind speed through the time of ultrasonic wave propagation in the air. French LCJ Capteurs ultrasonic wind speed sensor-CV7-OEM is a precise and robust wind speed sensor of Gongcai.com, which can pass the compact Wind speed sensors enable high accuracy and continuous wind speed and direction data collection. Maintenance-free, able to achieve a high standard of operation under the most extreme conditions, and also regarding sound, which is transmitted at intersections by flowing objects. Transmission is made by electro-acoustic transducers (1) using ultrasonic signals (2) to communicate between them, along the orthogonal axes, caused by the wind speed (3) of the acoustic wave transit time difference.
France LCJ Capteurs Ultrasonic Wind Speed Sensor - CV7-OEM communicates 4 different tests between them, and the food intake head wind obtained from the test is used for calculation. Combine the measurements to calculate the wind speed and the wind direction from the base axis. Temperature measurement is used for calibration. The design of the sensor reduces the effect of tilt (4) (the effect of sensor tilt can be partially corrected due to the shape of the sensor space). On the other hand, CV7 can also transmit 4 independent test data to ensure the correctness of the headwind vector calculation. This method gives a wind speed sensitivity of 0.15m/S, and excellent linearity can reach 40m/S S.
Next, let's take a look at how the wind speed sensor calculates the wind speed of the fan? We all know that the energy of the wind blown by the fan decreases with the increase of the distance, so how to define the wind speed of the fan and how to measure it?
In the air volume detection of electric fans, due to the different proficiency of personnel, the test conditions, environment and power supply performance cannot fully meet the requirements of the standard, resulting in inevitable uncertainty in the test data. Considering that the air supply structure of the electric fan does not have an internal air duct, the air flow is free intake and exhaust in a large space during work, so the air volume test does not use orifice plates or nozzles in the test air duct, etc. Instead of measuring the pressure difference generated by the throttling piece, the air volume is calculated directly by measuring the exhaust wind speed of the electric fan with an anemometer.
As for the measurement equipment, since the standard stipulates that the air volume is calculated by using the measured wind speed to calculate the air volume parameters of the electric fan, it is also recommended to use the French LCJ Capteurs ultrasonic wind speed sensor - CV7-OEM to measure the fan wind speed.
