The toplotno vetr hitrost senzor's delovanje

Kdaj zrak temperatura je stabilna, moč poraba vklop the ogrevanje žica is enako do the to to porabljena takojšna z the ogrevanje žica v zrak. The Upornost v the ogrevanje žica v zrak. The Upornost od The ogrevanje žica spremembe z Temperatura, in Upor Od the Ogrevanje žica in Temperatura Od Ogrevanje žica Pokaži A linearno Razmerje znotraj Običajna temperatura Razpon (0-300 stopinja ). The The Heat Release koeficient je povezan do the pretok zraka hitrost. The večji pretok hitrost, the večji the ustrezno toplota sprostitev koeficient, to to je, the hitreje the toplota odvajanje; the manjši the flow hitrost, the počasnejši the toplota odvajanje.

The pretok zraka hitrost izmerjeno z toplotno anemometer is a funkcija tok tok in upor. Ohranjanje tok (ali upor) konstantno, the izmerjeno zračno hitrost samo ustreza do the upor (ali tok) ena po ena.

The hot wire wind speed sensor has two design circuits of constant current and constant temperature. Constant temperature hot wire wind speed sensor is more commonly used. The principle of the constant temperature method is to keep the temperature of the hot wire constant during the measurement process to balance the bridge. At this time, the resistance of the hot wire remains unchanged, and the airflow velocity is only a single-valued function of the current. According to the known relationship between the airflow velocity and the current, the airflow velocity through the terminal device can be obtained. The constant current hot wire wind speed sensor keeps the current value flowing through the hot wire constant during the measurement process. When the current value is constant, the airflow velocity is only related to the resistance of the heating wire. According to the known relationship between the airflow velocity and the resistance of the hot wire, the airflow velocity passing through the wind speed sensor can be obtained.

Vroča žična vetrna hitrost senzorji meritev nihanje veter hitrosti. The toplotna vztrajnost of konstantna pretok veter hitrost senzor je relativno velik, medtem ko toplotna vztrajnost of konstantna temperatura veter hitrost senzor is relativno majhna and ima visoka hitrost odziv. The meritev natančnost od vroča žica ve hitrost je ne zelo visoka, so pozornost bi morala biti plačana temperatura kompenzacija kdaj uporaba it.