Par Anemometri Kā Anemometri Darbs
Izvēle of zonde for anemometrs
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 is used for precise measurement from 0 to 5m/s; The rotary probe of the anemometer performs well in mērīšana plūsma ātrumi diapazons no 5 līdz 40m/s; By using a pitot caurule ar an anemometrs, labāki rezultāti var iegūt at liels ātrums. An papildu kritērijs par pareizi atlase plūsma ātrums zonde of an an anemometrs is temperatūra, un parasti temperatūra diapazons for the thermal sensors of an anemometrs is around+-70C. The rotary probe of the specially designed anemometer can reach up to 350C. Pitot caurules are use for temperatures above+350}C. The specific details are as follow:
Termiskais jutīgais zonde of anemometrs
T darba princips of the thermal sensitive probe of the anemometer is based on the cold shock airflow nes away the heat from the heating element. With the help of an adjustment switch, the temperature is keep constant, and the current and flow rate are proportional to other. When use a thermal sensitive probe in turbulence, airflow from all directions vienlaicīgi impacts the thermal element, who can influence the the precizitāte of the mērījums rezultāti. Kad mērīšana in turbulence, the reading of the thermal anemometer flow sensor is bieži augstāks than that of the rotary zonde. The above phenomenon can be observed during pipeline measurement. Accord to different designs for managing turbulent flow in pipelines, it may even occur at low speeds. Tāpēc, the anemometer measurement process should be carried out in the straight section of the pipeline. Sākums punkts of taisne sekcija jābūt pie vismaz 10 × D (D=pipe diametrs, in CM) ārpusē mērījums punkts; The endpoint būtu pie vismaz 4 × D behind the measurement point. The fluid cross-section must not have any obstrukcija. (Sharp edges, heavy suspension, objects, etc.)
Ritenis tips zonde of anemometrs 2
Darbs darbs princips of the anemometrs's rotācija zonde ir bāzēts ieslēgts pārvērsts rotācija ieslēgts elektriski signāli. Pirmais, it iet caur caur a tuvums sensors galva to "count" the rotation of the rotors and ģenerēt a pulss series. Tad, it is converted and process by the detektors to iegūt ātrums vērtība. The large-diameter probe (60mm, 100mm) of the anemometer is appropriateable for mērīšanai turbulents plūsma ar vidējs līdz zems ātrums ( tādi as at cauruļvads izejas). Mazais apertūra zonde of the anemometrs is vairāk piemērots mērīšanai gaisa plūsma in cauruļvadi ar a šķērsgriezums lielāks nekā tas of izpēte galva by more than 100 reizes
