Kev khiav hauj lwm thiab txij nkawm ntawm cov khoom siv hluav taws xob hluav taws xob
1. Cov khoom siv hluav taws xob hluav taws xob yog cov cuab yeej ntes tau teeb tsa thiab siv hauv cov tsev lag luam thiab pej xeem cov tsev uas teb rau ib leeg lossis ntau cov roj combustible. Cov khoom siv hluav taws xob ntau tshaj plaws yog catalytic flammable gas detectors thiab semiconductor flammable gas detectors. Semiconductor-hom flammable gas detectors yog siv nyob rau hauv cov khw nojmov, tsev so, tsev studios thiab lwm qhov chaw uas siv roj, natural gas, thiab liquefied gas. Cov chaw lag luam uas tawm cov pa hluav taws xob thiab cov pa hluav taws xob feem ntau yog siv cov catalytic-type flammable gas detectors.
2. Lub catalytic combustible gas detector siv cov kev hloov pauv ntawm cov hlau refractory platinum hlau tom qab cua sov los ntsuas qhov concentration ntawm cov roj combustible. Thaum cov roj combustible nkag mus rau hauv lub ntes, nws ua rau oxidation cov tshuaj tiv thaiv (flameless combustion) nyob rau saum npoo ntawm platinum hlau. Lub tshav kub generated tsub kom qhov kub ntawm lub platinum hlau, thiab lub resistivity ntawm platinum hlau hloov. Yog li ntawd, thaum ntsib tej yam xws li kub siab, Thaum kub ntawm lub platinum hlau hloov, lub resistivity ntawm lub platinum hlau hloov, thiab cov ntaub ntawv kuaj pom yuav hloov.
3. Semiconductor combustible gas detector siv cov kev hloov ntawm semiconductor nto kuj los ntsuas qhov concentration ntawm combustible gas. Semiconductor flammable gas detectors siv roj-sensitive semiconductor Cheebtsam nrog siab rhiab heev. Thaum nws ntsib combustible gases nyob rau hauv nws ua hauj lwm lub xeev, lub semiconductor kuj poob, thiab tus nqi poob muaj ib tug sib raug zoo nrog cov concentration ntawm combustible gases.
4. Lub tshuab hluav taws xob hluav taws xob muaj ob ntu: kev tshawb nrhiav thiab kev tshawb nrhiav, thiab muaj kev tshawb nrhiav thiab kev ua haujlwm. Lub hauv paus ntsiab lus ntawm kev tshawb nrhiav ib feem ntawm cov khoom siv hluav taws xob hluav taws xob yog tias lub ntsuas hluav taws xob ntawm lub ntsuas hluav taws xob siv cov khoom tshawb nrhiav, ib qho ruaj khov resistor thiab xoom-hloov potentiometer los tsim ib qho kev kuaj pom. Tus choj siv platinum hlau ua tus cab kuj los catalyze lub caij. Tom qab siv fais fab, qhov kub ntawm cov hlau platinum nce mus rau qhov kub thiab txias, thiab huab cua mus txog qhov chaw ntawm lub caij los ntawm ntuj diffusion los yog lwm txoj kev. Thaum tsis muaj cov pa hluav taws xob hauv huab cua, qhov tso tawm ntawm tus choj yog xoom. Thaum cov huab cua muaj cov pa roj tsw qab thiab diffuses rau cov khoom tshawb nrhiav, flameless combustion tshwm sim vim catalysis, uas ua rau kom qhov kub thiab txias ntawm cov khoom kuaj pom thiab ua rau kom cov platinum hlau tsis kam. , ua rau tus choj Circuit Court poob qis, yog li outputting voltage teeb liab. Qhov loj ntawm qhov hluav taws xob no yog proportional rau qhov concentration ntawm cov pa hluav taws xob. Lub teeb liab yog amplified, analog-to-digital hloov dua siab tshiab, thiab cov concentration ntawm cov roj flammable yog tso tawm rau ntawm cov kua zaub. Lub hauv paus ntsiab lus ntawm kev tshawb nrhiav yog tias thaum ntsuas cov pa roj carbon monoxide ntau tshaj qhov txwv tus nqi, qhov txuas txuas txuas txuas hluav taws xob thiab ntsuas hluav taws xob ntsuas hluav taws xob, los ntawm qhov ntsuas hluav taws xob sib piv, lub tshuab hluav taws xob square yoj outputs cov teeb liab yoj square los tswj lub suab. . Lub teeb pom kev Circuit Court, lub buzzer ua suab nrov tsis tu ncua, lub teeb-emitting diode flashes, thiab xa tawm cov teeb liab pom. Los ntawm lub hauv paus ntsiab lus ntawm combustible gas detectors, nws yuav pom tau hais tias yog hais tias electromagnetic cuam tshuam tshwm sim, nws yuav cuam tshuam rau cov teeb liab nrhiav pom thiab ua rau cov ntaub ntawv sib txawv; yog tias muaj kev sib tsoo lossis kev vibration uas ua rau cov khoom siv tsis raug, kev kuaj pom yuav tshwm sim; yog tias ib puag ncig ntub dhau los yog cov khoom siv muaj dej nkag, nws kuj yuav tshwm sim. Qhov no tej zaum yuav ua rau luv luv Circuit Court nyob rau hauv lub flammable gas detector, los yog tus nqi hluav taws xob tiv thaiv Circuit Court yuav hloov, ua rau nrhiav tsis tau.
