Infrared range finder tus tsim
Lub infrared rangefinder feem ntau yog tsim los ntawm kev hloov pauv lub teeb pom kev zoo, chav txais txais, chav ntsuas theem, chav suav thiab tso saib, chav ntsuas kev tswj hwm thiab lub zog hloov pauv. Lub teeb ci feem ntau yog gallium arsenide (GaAs) semiconductor lub teeb-emitting diode. Thaum lub sijhawm tam sim no dhau los ntawm PN kev sib tshuam ntawm GaAs diode, PN kev sib tshuam yuav tawm ze-infrared lub teeb nrog lub wavelength ntawm 0.72 μm thiab 0.94 μm, uas yog vim qhov electron-qhov recombination nyob rau hauv doped GaAs semiconductor. , lub zog tshaj yog tso tawm nyob rau hauv daim ntawv ntawm photons. Ntxiv mus, lub emission siv lub teeb yuav sib txawv nrog cov tshuaj tam sim no. Yog li ntawd, yog tias nws yog siv los ua lub teeb pom kev ntawm qhov rangefinder, lub amplitude modulation ntawm lub teeb emitted siv tau ncaj qha los ntawm kev hloov qhov loj ntawm cov khoom noj tam sim no, uas yog, cov khoom siv hluav taws xob semiconductor no muaj ob txoj haujlwm ntawm " radiation" thiab "modulation".
Lub infrared photodetection hloov dua siab tshiab ntaus ntawv siv tau txais modulated lub teeb feem ntau yog silicon photodiode los yog avalanche photodiode, thiab cov khoom siv no muaj "photovoltage effect". Thaum lub teeb sab nraud yog irradiated ntawm nws PN hlws ris, vim yog cov nyhuv ntawm photoelectric zog hloov dua siab tshiab, muaj peev xwm sib txawv tuaj yeem tsim tawm ntawm ob tug ncej ntawm PN, thiab nws qhov loj yuav hloov nrog qhov siv ntawm qhov teeb meem teeb meem, yog li ua lub luag haujlwm ntawm " demodulation".
Lub hauv paus ntsiab lus ua haujlwm yog raws li nram no:
Nws siv lub hauv paus ntsiab lus ntawm non-diffusion thaum infrared rays propagate. Vim tias cov kab hluav taws xob infrared muaj qhov ntsuas me me heev thaum dhau los ntawm lwm yam khoom, qhov ntev-ntev rangefinders yuav xav txog cov kab hluav taws xob infrared, thiab kev nthuav tawm ntawm infrared rays yuav siv sij hawm. Tau txais, thiab tom qab ntawd qhov kev ncua deb tuaj yeem suav tau raws li lub sijhawm xa tawm mus rau qhov tau txais thiab kev nthuav tawm ceev ntawm infrared rays, yog li kev lag luam hu ua laser infrared photoelectric range finder, thiab nws cov hlau nplaum yog ib qho tshwj xeeb muaj zog hlau nplaum ruaj khov.
Lub teeb liab modulated f generated los ntawm lub ntsiab tswj oscillator (xws li lub ntsiab oscillator) yog amplified thiab ntxiv rau GaAs lub teeb-emitting raj, thiab lub infrared modulated lub teeb yog emitted los ntawm tam sim no modulation, thiab emissions ntawm lub emission optical system mus rau lub reflector. ntawm daim iav chaw nres tsheb, tom qab xav txog, lub teeb rov qab tau txais los ntawm qhov tau txais kev kho qhov muag, mus txog silicon photosensitive diode, thiab dhau los ntawm kev hloov pauv photoelectric kom tau txais cov teeb liab ntau zaus.
Nyob rau hauv qhov tsis siv neeg infrared rangefinder, lub logic hais kom ua Circuit Court yog teem rau kev tswj kev pab cuam. Tus tshiab ntau yam finder tsim nyob rau hauv lub xyoo tsis ntev los no siv ib tug microprocessor system, uas tsis tsuas yog ua kom tiav cov saum toj no-hais kev pab cuam tswj, tab sis kuj tsim lwm yam tsis siv neeg xeem functions, nrog rau ntau yam kev ntsuas nyob deb, txo thiab ntsuas tus kheej, thiab lwm yam. yooj yim siv.
