Txawv Mechanisms ntawm Kev Kho Mob Oxygen Sensors

Cov txheej txheem sib txawv ntawm kev kho mob oxygen sensors yog: electrochemical sensors, fluorescent oxygen sensors

1. Electrochemical oxygen sensor

Electrochemical oxygen sensing ntsiab yog tsuas yog siv los ntsuas cov ntsiab lus oxygen nyob rau hauv ambient huab cua.Cov sensors no tau muab tso rau hauv lub tshuab RGM los ntsuas qhov concentration ntawm cov pa oxygen.Lawv tawm cov tshuaj hloov pauv hauv qhov ntsuas qhov ntsuas, uas ua rau muaj hluav taws xob tso zis proportional rau qib oxygen.Electrochemical sensors hloov tshuaj lub zog rau hauv hluav taws xob hluav taws xob los ntawm oxidation thiab txo cov txheej txheem.Nws muab hluav taws xob tso zis rau cov cuab yeej proportional rau feem pua ​​​​ntawm cov pa oxygen hauv cathode thiab anode.Cov pa oxygen sensor ua raws li qhov tam sim no, yog li ntsuas qhov ntsuas hluav taws xob tau ua los ntawm cov khoom siv hluav taws xob.Cov zis tam sim no ntawm oxygen sensor yog proportional rau tus nqi ntawm oxygen noj los ntawm oxygen sensor.

Cov zis tam sim no ntawm ib qho electrochemical sensor feem ntau yog ntsuas hauv microamps (a).Qhov tam sim no tshwm sim thaum electrons dhau los ntawm cov txheej txheem oxidation ntawm lub anode thiab ions diffuse rau hauv cov tshuaj electrolyte los ntawm cov txheej txheem txo cov pa ntawm cathode.

2. fluorescent oxygen sensor

Optical oxygen sensors yog ua raws li lub hauv paus ntsiab lus ntawm fluorescence quenching ntawm oxygen.Lawv cia siab rau kev siv lub teeb pom kev zoo, lub teeb pom kev thiab cov khoom siv luminescent uas ua rau lub teeb pom kev zoo.Luminescence-raws li oxygen sensors hloov electrochemical oxygen sensors hauv ntau qhov chaw.

Lub hauv paus ntsiab lus ntawm molecular oxygen fluorescence quenching tau ntev tau paub.Qee cov molecules lossis cov tshuaj fluoresce (piv txwv li, emit lub teeb lub zog) thaum raug lub teeb.Txawm li cas los xij, yog tias muaj cov pa oxygen molecules, lub teeb lub zog raug xa mus rau cov pa oxygen molecules, uas ua rau cov fluorescence tsawg dua.Los ntawm kev siv lub teeb pom kev zoo, lub teeb pom kev zoo yog qhov sib npaug ntawm cov pa oxygen molecules hauv cov qauv.Yog li, qhov tsawg dua fluorescence raug kuaj pom, ntau cov pa oxygen molecules yuav tsum muaj nyob hauv cov qauv roj.

Hauv qee cov sensors, fluorescence raug kuaj pom ob zaug hauv ib lub sijhawm paub.Es tsis txhob ntsuas tag nrho cov fluorescence, qhov txo qis hauv fluorescence thaum lub sij hawm (piv txwv li, fluorescence quenching) yog ntsuas.Qhov kev lwj-raws li lub sij hawm mus kom ze tso cai rau kev yooj yim sensor tsim.

Lub raj xa hluav taws xob fluorescent oxygen sensor LOX-02-F yog lub ntsuas hluav taws xob uas siv cov fluorescence quenching ntawm oxygen los ntsuas cov pa oxygen ambient.Txawm hais tias nws muaj tib lub qauv columnar thiab 4-series loj raws li cov pa hluav taws xob sensors, nws tsis nqus oxygen thiab muaj qhov zoo ntawm lub neej ntev (5 xyoos).Qhov no ua rau nws muaj txiaj ntsig zoo rau cov khoom siv xws li chav tsev oxygen depletion ceeb toom kev nyab xeeb uas saib xyuas cov tee tam sim ntawd hauv cov pa oxygen hauv compressed gas khaws cia hauv huab cua sab hauv.