Reed Switches thiab Hall Effect Sensors

Reed Switches thiab Hall Effect Sensors

Reed Switches thiab Hall Effect Sensors
Sib nqus sensors yog siv nyob rau hauv txhua yam ntawm lub tsheb mus rau lub xov tooj ntawm tes. Kuv yuav siv cov hlau nplaum dab tsi nrog kuv lub tshuab nqus hlau nplaum? Kuv puas yuav tsum siv Hall effect sensor lossis reed hloov? Yuav ua li cas cov hlau nplaum yuav tsum oriented rau lub sensor? Kuv yuav tsum muaj kev txhawj xeeb dab tsi? Kawm paub ntau ntxiv nrog K&J taug kev los ntawm kev qhia txog kev sib nqus-sensor ua ke.

Reed Switch yog dab tsi?

Ob chav Hall effect sensors thiab reed hloov. Lub reed hloov yog nyob rau sab xis.
Lub reed hloov yog ib qho hluav taws xob hloov ua los ntawm kev siv magnetic teb. Nws muaj ib khub ntawm kev sib cuag ntawm ferrous hlau reeds nyob rau hauv ib lub hnab ntawv airtight iav. Cov kev sib cuag yog ib txwm qhib, ua rau tsis muaj hluav taws xob tiv tauj. Lub tshuab hluav taws xob yog actuated (kaw) los ntawm kev nqa cov hlau nplaum ze ntawm qhov hloov. Thaum cov hlau nplaum raug rub tawm, lub reed hloov yuav rov qab mus rau nws qhov qub.

Dab tsi yog Hall Effect Sensor?
Hall effect sensor yog lub transducer uas sib txawv nws cov zis voltage nyob rau hauv teb rau cov kev hloov nyob rau hauv magnetic teb. Hauv qee txoj kev, Hall effect sensors tuaj yeem ua haujlwm zoo ib yam li lub reed hloov, tab sis tsis muaj qhov txav. Xav tias nws yog ib qho khoom siv hauv xeev, zoo rau kev siv digital.

Qhov twg ntawm ob lub sensors zoo rau koj daim ntawv thov nyob ntawm ntau yam. Cov yam tseem ceeb suav nrog tus nqi, kev taw qhia hlau nplaum, ntau zaus (reed keyboards feem ntau tsis tuaj yeem siv tau tshaj 10 kHz), teeb liab bounce thiab tsim ntawm cov logic circuitry.

Magnet - Sensor Orientation
Qhov sib txawv tseem ceeb ntawm cov reed keyboards thiab Hall effect sensors yog qhov kev taw qhia tsim nyog rau cov hlau nplaum ua kom muaj zog. Hall effect sensors qhib thaum lub magnetic teb uas yog perpendicular mus rau lub solid-state sensor yog siv. Feem ntau saib rau cov hlau nplaum sab qab teb kom tau ntsib qhov chaw qhia ntawm lub sensor, tab sis xyuas cov ntawv qhia tshwj xeeb ntawm koj lub sensor. Yog tias koj tig cov hlau nplaum rov qab los yog sab nraud, lub sensor yuav tsis qhib.

Reed keyboards yog cov cuab yeej siv tshuab nrog cov khoom txav. Nws muaj ob txoj hlua ferromagnetic sib cais los ntawm qhov sib txawv me me. Nyob rau hauv lub xub ntiag ntawm ib tug magnetic teb uas nyob rau tib lub sij hawm rau cov xov hlau, lawv yuav kov ib leeg, ua hluav taws xob sib cuag. Hauv lwm lo lus, qhov sib nqus axis ntawm cov hlau nplaum yuav tsum sib npaug rau qhov ntev ntawm lub reed hloov. Hamlin, lub chaw tsim khoom ntawm reed keyboards, muaj ib daim ntawv thov zoo heev ntawm cov ncauj lus. Nws suav nrog cov duab kos zoo uas qhia txog thaj chaw thiab kev taw qhia uas lub sensor yuav qhib.
Kev Taw Qhia Cov Magnet Zoo: Lub Hlwb nyhuv sensor (sab laug) vs. ib lub reed hloov (sab xis)
Nws yuav tsum tau muab sau tseg tias lwm yam configurations yog ua tau thiab feem ntau siv. Piv txwv li, Hall effect sensors tuaj yeem ntes cov hniav hlau ntawm lub kiv cua "kiv cua". Cov hniav hlau ntawm cov kiv cua kis ntawm cov hlau nplaum nyob ruaj ruaj thiab nyob ruaj ruaj sensor. Thaum cov hlau nyob nruab nrab ntawm ob, lub magnetic teb yog redirected deb ntawm lub sensor (blocked) thiab lub qhov rais qhib. Thaum cov hlau txav mus deb, cov hlau nplaum kaw qhov hloov