Technology for measuring anemometers and a way for making a decision!
The measurement range of flow velocity from 0 to 100m/s can be divided into three sections: low speed: 0 to 5m/s; Medium speed: 5 to 40m/s; High speed: 40 to 100m/s. The thermal sensitive probe of the anemometer/anemometer is used for measurements ranging from 0 to 5m/s; The rotary probe of the anemometer/anemometer has the most ideal effect in measuring flow velocities ranging from 5 to 40m/s; And using a pitot tube can achieve the best results in the high-speed range. An additional standard for selecting the flow rate probe of an anemometer/anemometer correctly is temperature, which is typically used at temperatures of approximately+-70C for thermal sensors of anemometers/anemometers. The rotor probe of a specially designed anemometer/anemometer can reach 350C. Pitot tubes are used for temperatures above+350C.
The working principle of the thermal sensitive probe of the anemometer/anemometer is based on the cold impact airflow taking away the heat on the thermal element. With the help of a regulating switch, the temperature is kept constant, and the regulating current is proportional to the flow rate. When using a thermosensitive probe in turbulence, airflow from all directions simultaneously impacts the thermal element, which can affect the accuracy of the measurement results. When measuring in turbulence, the reading of the thermal anemometer/anemometer velocity sensor is often higher than that of the rotary probe. The above phenomena can be observed during pipeline measurement. According to different designs for managing pipeline turbulence, it can even occur at low speeds. Therefore, the anemometer/anemometer measurement process should be carried out on the straight section of the pipeline. The starting point of the straight section should be at least 10 times before the measurement point × D (D=pipeline diameter, in CM); The endpoint should be at least 4 after the measurement point × Location D. The fluid cross-section must not have any obstruction. (edges, overhangs, objects, etc.)
Wheel type probe for anemometer/anemometer
The working principle of the rotary probe of the anemometer/anemometer is based on converting the rotation into an electrical signal. First, through a proximity sensing start, the rotation of the rotary wheel is "counted" and a pulse series is generated. Then, after being converted by the detector, the speed value can be obtained. The large-diameter probe (60mm, 100mm) of the anemometer/anemometer is suitable for measuring turbulence at medium and small flow rates (such as at pipeline outlets). The small caliber probe of the anemometer/anemometer is more suitable for measuring airflow with a cross-sectional area greater than 100 times that of the exploration head.
