Hauv yav dhau losblog ncej, kuv qhia aLED Teeb pom kev zoo tswj Reference Design for Machine Vision. Hauv cov ntawv tshaj tawm no, Kuv xav piav qhia me ntsis txog nws, ua raws li tib txoj hauv kev uas peb pab neeg ua raws thaum lub sijhawm tsim qauv.
Yooj yim digestible tidbits
Thaum lub sij hawm tus txheej txheem tsim, peb ntim cov ntsiab lus rau hauv me me subcircuits thiab muab cov blocks piav qhia lub npe, raws li qhia nyob rau hauv daim duab 1. Qhov no pab peb hloov peb lub tswv yim mus rau hauv lub tiag tiag Circuit Court.
Ib puag ncig ncig los ntawm kev siv tsim
Cia peb pib nrogCommon Powerthaiv. Ua kom ncaj ncees, qhov no yog qhov thaiv Circuit Court uas kuv yuav tsum tau tawm ntawm nws lub npe me ntsis tsis meej, vim tias Common Power block yog smorgasbord tsawg kawg yog xya qhov haujlwm sib txawv.
Cov lus xaiv muaj nws tias kuv tsuas tso tag nrho xya lub luag haujlwm rau hauv qhov thaiv no vim kuv tsis paub tias yuav muab tso rau qhov twg ntxiv. Tsis muaj tseeb: tag nrho cov haujlwm no cuam tshuam nrog lub zog. Common Power block yog lub tsev ntawm cov cuab yeej siv thiab ua haujlwm zoo li 5V phaw, 3.3V qis-dropout regulator (LDO), 2.5V siv thiab cov khoom siv hluav taws xob cuam tshuam (EMI) lim.
Yog hais tias tsis txaus siab txaus, kuv kuj muab ibTSO 26602eFuse rau hauv qhov thaiv. Cov cuab yeej no saib xyuas lub zog tawm tswv yim thiab muab kev tiv thaiv yuav luag lossless rov qab. Pab neeg no txawm xav txog yuav ua li cas hloov qhov txwv tam sim no ntawm eFuse ntawm ya. Qhov kev hloov pauv hloov pauv tam sim no ua rau lub tshuab hluav taws xob tsis tu ncua ntawm 15W dhau ntawm 8V-to-36V input voltage ntau. Ib qho channel ntawm dual digital-to-analog converter (DAC) muab kev tswj qhov hluav taws xob rau qhov no.
Tsiv nrog, lubLED Buck thiab LED Boardblocks ua ke ua ke nrog kev ua haujlwm ntawm LED. Lawv txhawb lub ultra-luv luv 200ns LED strobes nrog tas li tam sim no mus txog 2.4A thiab mem tes repetitions txog 10kHz. Tsav ib txoj hlua ntawm tsib lub zog loj LEDs ua rau 40W ntawm lub zog mem tes ntawm 2.4A tam sim no. Cov qauv siv txhawb nqa lub sijhawm ntev dua (txog rau kev ua haujlwm txuas ntxiv ntawm LED), qis dua LED tam sim no thiab qis dua tus nqi ib yam nkaus. Lub sijhawm luv luv thiab lub caij nplooj zeeg ntawm LED tam sim no thiab lub sijhawm luv luv thiab tsis tu ncua ntawm 10µs tau qhib los ntawm ob qho tib si kev tswj hwm tshwj xeeb thiab los ntawm 48V siv los ua lub zog rauTPS 92515 HVLED zaub converter.
PlaubTMP 116kub sensors saib xyuas lub rooj tsavxwm kub; cov sensors no muaj peev xwm hloov tau cov LEDs thiab lwm yam khoom siv los tiv thaiv lub cev. Txhua qhov ntsuas kub ntsuas tau muab 64 cov khoom siv hluav taws xob siv hluav taws xob tshem tawm programmable nyeem nkaus xwb nco (EEPROM) txhawm rau txheeb xyuas cov modules lossis khaws cov ntaub ntawv calibration.
Ib lub siab LED npog phaj txo qhov kev pheej hmoo ntawm qhov muag raug mob.
Puas yog koj tsis meej pem los ntawm 40W ntawm LED lub zog los ntawm 15W ntawm qhov kev tawm tswv yim, lossis nug koj tus kheej tias peb tau ua dab tsi nrog cov channel seem ntawm DAC dual? Cia kuv piav qhia los ntawm kev sib tham txog qhovPre-Boostthaiv, lwm lub voj voog tsis yooj yim. Lub pre-boost muab 48V (siv los ntawm LED phaw)los ntawm 8V-to-36V system input voltage. Cov zis ntawm lub subcircuit no yog buffered los ntawm ib lub txhab nyiaj ntawm capacitors los txhawb 40W pulses. Qhov kev txhawb nqa ua ntej ua haujlwm nrog qhov hloov pauv nruab nrab ntawm cov tswv yim tam sim no txwv (tswj los ntawm ob lub channel ntawm DAC dual) thiab siv 10W tas li thaum qhib.
Saib ntawm LED teeb pom kev zoo tswj kev siv tus qauv tsim schematic, koj yuav xav paub yog vim li cas peb siv cov theem-dimmable, ib-theem boost controller zoo li lubTSO 92561. Cov lus teb yog vim nws yooj yim input tam sim no tswj.
Piv nrog rau tag nrho cov kev hloov kho peb tau ua rau cov blocks uas kuv tau piav qhia txog tam sim no, qhov seem ob lub thaiv hluav taws xob ua raws li lawv lub npe. CovMicrocontroller (MCU)block muaj aMSP430F5172MCU nrog lub sijhawm daws teeb meem siab thiab muab kev tswj hwm tseem ceeb rau kev ua tiav kev tsim qauv, suav nrog kev saib xyuas, saib xyuas, sijhawm thiab kev sib txuas lus nrog cov kev pabcuam davhlau ya nyob twg ntawm tus neeg siv lub PC.
CovIsolated Power thiab Data Interfaceblock suav nrog ibTSO 7842digital isolator nrog kev sib koom ua ke lub zog hloov pauv thiab rhuav tshem cov voj voog hauv av uas tsis xav tau thiab muab kev daws teeb meem rau cov teeb meem tsis muaj kev cuam tshuam sab nraud thiab kev sib txuas lus.
Daim duab 2 graphically depicts txhua yam kuv tau piav txog tam sim no.
Raws li koj tuaj yeem pom, tsuas yog ob ntawm rau lub blocks muaj zog khi rau LED teeb pom kev zoo.Yog vim li ntawd kuv vam tias kuv cov lus piav qhia yuav txhawb koj kom rov siv cov subcircuits no hauv lwm cov qauv tsim thiab lwm yam kev siv. Yog xav paub ntxiv, xav kom muaj cov ncauj lus kom ntxaws ntawm cov ntaub ntawv muab nrog rau qhov noLED teeb pom kev tswj siv siv tsim.
