Combustible gas detector siv thiab tu
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. Muaj ob hom flammable gas detectors uas tau siv ntau zaus hauv lub neej niaj hnub: catalytic flammable gas detectors thiab semiconductor flammable gas detectors. Cov khw noj mov, tsev so, chav ua haujlwm hauv tsev thiab lwm qhov chaw uas siv roj av, roj av, thiab cov roj av liquefied feem ntau yog siv cov khoom siv hluav taws xob semiconductor-hom flammable gas detectors, thiab cov chaw ua lag luam uas tawm cov roj hluav taws xob thiab cov vapors flammable feem ntau yog siv catalytic-type flammable gas detectors.
2. Lub catalytic combustible gas detector siv cov kev hloov pauv ntawm refractory hlau platinum hlau los ntsuas cov roj combustible concentration. Thaum cov roj combustible nkag mus rau hauv lub ntes, nws yuav ua rau oxidation cov tshuaj tiv thaiv (flameless combustion) nyob rau saum npoo ntawm platinum hlau, thiab lub tshav kub generated yuav ua rau kom kub ntawm lub platinum hlau, thiab lub resistivity ntawm platinum hlau yuav hloov. Thaum qhov kub thiab txias ntawm platinum hlau hloov, qhov resistivity ntawm platinum hlau hloov, thiab cov ntaub ntawv kuaj pom kuj hloov.
3. Lub semiconductor-hom combustible gas detector siv cov kev hloov ntawm semiconductor nto kuj los ntsuas qhov concentration ntawm combustible gas. Lub semiconductor combustible gas detector siv cov roj rhiab heev semiconductor nrog siab rhiab heev. Thaum nws ntsib cov roj combustible hauv lub xeev ua haujlwm, qhov tsis kam ntawm cov semiconductor yuav poob, thiab tus nqi poob muaj kev sib raug zoo nrog cov concentration ntawm cov roj combustible.
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 qhov ntsuas hluav taws xob hluav taws xob yog tias lub ntsuas hluav taws xob siv lub ntsuas hluav taws xob siv cov khoom tshawb pom, ib qho ruaj khov resistor thiab xoom potentiometer los tsim ib qho kev tshawb nrhiav choj. Tus choj siv platinum hlau ua cov cab kuj catalytic. Tom qab hluav taws xob, qhov kub ntawm cov hlau platinum nce mus rau qhov ua haujlwm kub, thiab huab cua mus txog qhov chaw ntawm lub caij los ntawm ntuj diffusion lossis lwm txoj hauv 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 mus rau qhov kev tshawb pom, flameless combustion tshwm sim vim catalytic kev txiav txim, uas ua rau qhov kub thiab txias ntawm cov khoom nrhiav pom tau nce thiab qhov tsis kam ntawm platinum hlau nce. , yog li ntawd tus choj tsis muaj qhov sib npaug, kom muaj qhov hluav taws xob tawm hluav taws xob, qhov loj ntawm qhov hluav taws xob no yog proportional rau qhov concentration ntawm cov roj hluav taws xob, lub teeb liab yog amplified, hloov los ntawm analog mus rau digital, thiab cov concentration ntawm cov pa taws. yog tso tawm los ntawm cov kua zaub. Lub hauv paus ntsiab lus ntawm qhov kev tshawb pom yog tias thaum cov concentration ntawm cov ntsuas hluav taws xob ntau tshaj qhov txwv tus nqi, tus choj amplified tso zis hluav taws xob thiab qhov ntsuas hluav taws xob ntsuas hluav taws xob, los ntawm qhov sib piv voltage, lub tshuab hluav taws xob square yoj tawm cov teeb liab ntawm lub teeb liab, tswj lub suab, Nyob rau hauv lub teeb pom kev Circuit Court, lub buzzer ua suab nrov nruam, thiab lub teeb-emitting diode flashes xa tawm lub teeb liab nrhiav pom. Los ntawm lub hauv paus ntsiab lus ntawm cov khoom siv hluav taws xob hluav taws xob, nws tuaj yeem pom tias yog tias muaj kev cuam tshuam ntawm electromagnetic, lub teeb liab nrhiav pom yuav raug cuam tshuam, thiab cov ntaub ntawv sib txawv yuav tshwm sim; yog tias muaj kev sib tsoo lossis kev vibration uas ua rau cov khoom tawg, qhov kev kuaj pom yuav ua tsis tiav; yog tias ib puag ncig ntub dhau los yog cov khoom siv nkag mus rau hauv dej, nws kuj yuav raug puas tsuaj. Ua rau luv luv Circuit Court nyob rau hauv lub flammable gas detector, los yog ib tug kev hloov nyob rau hauv kab kuj tus nqi, ua rau ib tug nrhiav tsis tau.
