Passive infrared (PIR) sensors yog rhiab heev rau ib tug neeg' cov tawv nqaij kub los ntawm emission dub-lub cev hluav taws xob nyob rau hauv nruab nrab-infrared wavelengths, nyob rau hauv sib piv rau cov keeb kwm yav dhau ntawm chav tsev kub. Tsis muaj lub zog tawm ntawm lub sensor, yog li lub npe passive infrared.Qhov no txawv ntawm lub qhov muag hluav taws xob piv txwv li (tsis yog feem ntau suav hais tias yog lub ntsuas hluav taws xob), uas hla ntawm tus neeg lossis lub tsheb cuam tshuam rau lub teeb pom kev lossis infrared. Cov cuab yeej no tuaj yeem ntes cov khoom, tib neeg, lossis tsiaj los ntawm kev khaws ib qho' cov hluav taws xob infrared.
Cov tshuab no hnov qhov cuam tshuam rau cov xov tooj cua nthwv dej thaum lawv dhau ntawm node mus rau ntawm lub mesh network. Lawv muaj peev xwm ntes tau nyob rau thaj chaw loj tag nrho vim tias lawv tuaj yeem nkag siab los ntawm cov phab ntsa thiab lwm yam kev cuam tshuam. RF tomographic motion detection systems tuaj yeem siv cov khoom siv kho mob siab, lwm yam khoom siv wireless lossis kev sib txuas ntawm ob. Lwm cov khoom siv wireless muaj peev xwm tuaj yeem ua cov nodes ntawm lub mesh tom qab tau txais kev hloov kho software.
Nrog rau kev loj hlob ntawm cov koob yees duab uas tsis tshua muaj nqi tuaj yeem tua cov yeeb yaj kiab, nws muaj peev xwm siv cov khoom tsim tawm ntawm lub koob yees duab zoo li no los ntes cov lus tsa suab hauv nws qhov kev pom siv software. Qhov kev daws teeb meem no yog qhov tshwj xeeb tshaj yog thaum lub hom phiaj yog los kaw cov yeeb yaj kiab uas tshwm sim los ntawm kev tshawb nrhiav cov lus tsa suab, vim tias tsis muaj khoom kho vajtse dhau lub koob yees duab thiab lub computer xav tau. Txij li thaum pom daim teb tej zaum yuav ib txwm illuminated, qhov no tej zaum yuav xam tau tias yog lwm passive technology. Txawm li cas los xij, nws kuj tseem tuaj yeem siv ua ke nrog ze-infrared illumination los ntes cov lus tsa suab hauv qhov tsaus ntuj, uas yog, nrog lub teeb pom kev ntawm lub wavelength undetectable los ntawm tib neeg lub qhov muag.