Nyob rau hauv cov txheej txheem ntawm kev tsim tshuaj, kev tswj cov qib kua yog qhov tseem ceeb heev. Qhov tseeb thiab txhim khu kev qha kua theem sensors tsis tsuas yog ua kom muaj kev ruaj ntseg ntawm cov txheej txheem tsim khoom, tab sis kuj tseem tiv thaiv qhov tshwm sim ntawm kev nyab xeeb kev raug mob. Rau cov kua theem tswj cov ntaub ntawv raw cov ntaub ntawv, nws yog ib qho tseem ceeb tshwj xeeb los xaiv cov kua theem sensor.
1. Photoelectric kua theem sensor
Lub photoelectric kua theem sensor siv lub hauv paus ntsiab lus ua haujlwm ntawm infrared LED thiab phototransistor, thaum lub sensor nyob hauv huab cua, lub teeb infrared tuaj yeem ua ke ib txwm; Thaum immersed nyob rau hauv cov kua, lub teeb infrared dim thiab cov zis lub xeev hloov. Lub sensor no tuaj yeem ntes yuav luag txhua cov kua thiab tsis cuam tshuam los ntawm lub teeb pom kev zoo, ua npuas ncauj thiab npuas me me, ua rau nws txhim khu kev qha thiab tsis muaj kev saib xyuas. Txawm li cas los xij, photoelectric qib sensors feem ntau tsuas yog txiav txim siab qhov muaj lossis tsis muaj kua, thiab txhawm rau ntsuas cov qib sib txawv, ntau lub sensors yuav tsum tau teeb tsa.
Thib ob, capacitive kua theem sensor
Capacitive qib sensors txiav txim siab theem los ntawm kev ntsuas qhov kev hloov pauv ntawm ob lub voj voog luv luv. Thaum tus neeg xyuas pib nkag rau hauv cov kua, tus nqi capacitance hloov pauv, qhia txog qib ntawm cov kua theem. Hom sensor no haum rau ntsuas qhov nce thiab poob ntawm cov kua hauv cov ntim, tab sis nws yuav tsum tau muab sau tseg tias corrosion ntawm tus neeg xyuas pib yuav hloov tus nqi capacitance thiab yuav tsum tau ntxuav los yog recalibrated tsis tu ncua. Tsis tas li ntawd, cov qib capacitive sensors yog cov rhiab heev rau hom kua, thiab qhov sib txawv ntawm dielectric tas li ntawm cov kua sib txawv tuaj yeem cuam tshuam qhov ntsuas qhov tseeb.
