1.Yuav ua li cas soj ntsuam cov pa phem thiab cov pa phem hauv kev tsim kho qhov
Cov pa phem thiab cov pa phem hauv qhov av yog ib txwm muaj kev phom sij loj hauv kev tsim kho, yog tias kev tsim kho tsis raug, nws yooj yim ua rau muaj kev nyab xeeb loj heev. Yog li dab tsi yog qhov teeb meem gases nyob rau hauv tunnels? Lawv feem ntau yog methane, carbon monoxide, carbon dioxide, hydrogen sulfide, nitrogen thiab sib txawv ntawm cov hydrocarbons hnyav thiab taug qab tsis tshua muaj gases.
Raws li cov khoom siv tshuaj lom neeg, cov pa phem thiab cov pa phem no tau muab faib ua ob pawg: cov pa roj combustible thiab toxic gas.Cov khoom tseem ceeb ntawm cov pa taws hauv qhov av yog methane (CH4, gas) thiab qee cov organic tebchaw (peb sib sau ua ke hu nws. VOC), uas yooj yim rau hlawv thiab txawm ua rau tawg thaum lawv ntsib qhov hluav taws kub, yog li ua rau muaj kev puas tsuaj rau lub neej thiab khoom.
Cov pa roj carbon monoxide nyob rau hauv qhov av tau muab faib ua peb pawg ntawm cov pa roj (chlorine, phosgene, biphosgene, sulfur dioxide, nitrogen oxides, formaldehyde, ammonia, ozone), asphyxiating gases (carbon monoxide, hydrogen sulfide, hydrogen cyanide, carbon dioxide) thiab Mob toxic organic gases (VOC) raws li lawv cov txheej txheem sib txawv ntawm kev ua ntawm tib neeg lub cev. Nws yog tsim nyog hais tias feem ntau cov organic gases (VOCs) yog ob qho tib si lom thiab flammable, xws li n-hexane thiab dichloromethane. Kev ntsuam xyuas rau cov organic tebchaw yav dhau los feem ntau tau kuaj pom lawv qhov tawg, tab sis feem ntau ntawm qhov tseem ceeb uas tsis ncav cuag qhov qis qis (LEL) concentration ntawm cov pa. Nws cov tshuaj toxicity twb ua rau tib neeg lub cev raug mob, yog li txhawm rau txhawm rau tshawb nrhiav cov organic tebchaw (VOC), peb yuav tsum ua ntej kuaj cov tshuaj lom thiab tom qab ntawd kuaj qhov tawg.
2.Yuav ua li cas xaiv cov tshuaj lom thiab teeb meem roj ntes
Ua ntej, peb yuav tsum txiav txim siab seb hom thiab concentration ntau npaum li cas ntawm cov roj yuav raug kuaj pom. Combustible gas nrog methane raws li lub ntsiab tivthaiv yog yooj yim tam sim no nyob rau hauv lub qhov, yog li nws yog tsim nyog los nruab ib tug detector nrog ib tug combustible gas sensor; Qhov thib ob, kuj tseem tuaj yeem muaj cov pa roj carbon monoxide (CO), hydrogen sulfide (H2S) thiab lwm cov pa roj carbon monoxide hauv qhov av, yog li nws tseem muaj lub tshuab kuaj xyuas carbon monoxide (CO) thiab hydrogen sulfide (H2S) sensor. Xav tias tej zaum kuj muaj cov organic toxic thiab teeb meem gases (VOC) nyob rau hauv lub qhov, uas yuav ua rau tsawg concentrations ntawm tib neeg lom, xws li aromatic hydrocarbons, halogenated hydrocarbons, ammonia (amine), ethers, alcohols, esters, thiab lwm yam. kuj pom zoo kom xaiv photoionization (PID) sensors.
3. Hais txog calibration.
Vim tias cov roj ntes sensor nyob rau hauv ib txwm siv, nws rhiab heev ib txwm txo los ntawm 10% mus rau 30% ib xyoos twg, yog hais tias cov roj detector sensor rhiab heev txo, cov pa tawm ntawm cov pa concentration mus txog qhov tsawg explosive txwv thiab tsis tswb nyob rau hauv lub sij hawm, yuav muaj. yuav muaj kev pheej hmoo ntawm kev tawg. Yog li ntawd, lub tshuab ntsuas roj yuav tsum tau kuaj xyuas txhua xyoo kom paub tseeb tias qhov tseeb thiab kev ntseeg tau ntawm nws qhov kev ua tau zoo thiab qhov muaj nuj nqis.