PARALLAX INC 28041 LaserPING Rangefinder Module
I-LaserPING 2m Rangefinder inikeza indlela elula yokulinganisa ibanga. Le nzwa ye-infrared, time-of-flight (TOF) ilungele ukuthatha izilinganiso phakathi kwezinto ezihambayo noma ezimile. Iphinikhodi eyodwa ye-I/O isetshenziselwa kokubili ukubuza inzwa ye-LaserPING ngesilinganiso sayo sakamuva sebanga, nokufunda impendulo. I-LaserPING 2m Rangefinder ingasetshenziswa cishe nanoma iyiphi i-microcontroller, isebenzisa imodi yayo ye-PWM noma imodi ye-serial ongayikhetha. Iklanyelwe ukujikeleza- kanye nekhodi-ehambisana ne-PING))) I-Ultrasonic Distance Sensor, okwenza izinhlelo zokusebenza zivumelane nezimo lapho izimo zemvelo ezahlukene zidinga ukucatshangelwa. Izilinganiso zingathathwa nangewindi le-acrylic ukuze kuvikelwe inzwa.
I-co-processor eyakhelwe ngaphakathi yenzwa iqinisekisa amaleveli afanele okunengqondo. Izixhumanisi zayo ze-I/O zisebenza ngevolumu efanayotage inikezwe iphinikhodi ye-VIN, ukuze ihambisane ne-3.3V kanye nezilawuli ezincane ze-5V.
Izici
- Isilinganiso sebanga lokungaxhunywana naye ngobubanzi obungu-2 -200 cm
- Ifekthri ilinganiswe kusengaphambili ukuze inembe ngokulungiswa okungu-1 mm
- Ukukhanya okuvikeleke ngeso okungabonakali eduze kwe-infrared (IR) kusetshenziswa i-laser emitter yekilasi 1
- Ukuvikelwa kokuhlehla kwe-polarity uma i-VIN ne-GND zishintshwa ngephutha
- I-Microprocessor yangaphakathi iphatha ikhodi yenzwa eyinkimbinkimbi
- Ihambisana nezilawuli ezincane ze-3.3V kanye ne-5V
- I-Breadboard-friendly 3-pin SIP form-factor enembobo yokukhweza
Imibono yohlelo lokusebenza
- Izifundo zePhysics
- Izinhlelo zokuphepha
- Imibukiso egqwayizayo esebenzisanayo
- Ukuzulazula kwamarobhothi kanye nezinhlelo zomsizi wokupaka
- Izinhlelo zokusebenza ezisebenzisanayo ezifana nokutholwa kwesandla kanye nokubonwa kokuthinta kwe-1D
- Ukutholwa kwevolumu noma ukuphakama kumasistimu okulawula inqubo
Imininingwane Ebalulekile
- I-Laser: 850 nm VCSEL (I-Vertical Cavity Surface Emitting Laser)
- IbangaUkuphakama: 2-200 cm
- Isixazululo: 1 mm
- Izinga lokuvuselela elijwayelekile: Imodi ye-PWM engu-15 Hz, imodi ye-serial engu-22 Hz
- Izidingo zamandla: +3.3V DC ukuze +5 VDC; 25 mA
- Izinga lokushisa lokusebenza: +14 kuya +140 °F (-10 kuya +60 °C)
- Ukuphepha kwamehlo e-Laser: Umkhiqizo we-laser wesigaba 1 one-infrared eduze
- Inkambu yokukhanyisa: 23° degrees
- Inkambu ye view: 55° degrees
- Isici sefomu: unhlokweni wesilisa wamaphini angu-3 ngesikhala esingu-0.1″
- Ubukhulu be-PCB: 22 x 16 mm
Ukuqalisa
Xhuma izikhonkwane zenzwa ye-LaserPING emandleni, phansi, kanye nephinikhodi ye-I/O ye-microcontroller yakho njengoba kukhonjisiwe kumdwebo. Qaphela ukuthi umdwebo ubonisa ingemuva lenzwa; khomba ingxenye yengxenye entweni eqondiwe. Inzwa ye-LaserPING isekelwa amabhulokhi e-BlocklyProp, imitapo yolwazi ye-Propeller C, kanye nesibample khodi ye-BASIC Stamp kanye ne-Arduino Uno. Kuyisekhethi- kanye nekhodi-ihambisana nezinhlelo zokusebenza ze-PING))) Inzwa yebanga le-Ultrasonic (#28015). Bheka okulandiwe kanye nezixhumanisi zokufundisa ekhasini lomkhiqizo lezinzwa; sesha okuthi “28041” kokuthiwww.parallax.com.
Iphrothokholi Yezokuxhumana
Inzwa ikhipha i-infrared (IR) laser pulse ehamba emoyeni, ibonise ngaphandle kwezinto bese iphindela emuva kwinzwa. Imojuli ye-LaserPING ikala ngokunembile ukuthi i-laser pulse ebonisiwe ithatha isikhathi esingakanani ukubuyela kunzwa, futhi iguqule lesi silinganiso sesikhathi sibe amamilimitha, ngokulungiswa okungu-1 mm. I-microcontroller yakho ibuza imojula ye-LaserPING ngesilinganiso sakamuva (esivuselelwa cishe njalo ngo-40 ms) bese ithola inani emuva kuphinikhodi ye-I/O efanayo, njengokushaya kwe-variable-width kumodi ye-PWM, noma njengezinhlamvu ze-ASCII kuchungechunge. imodi.
Imodi ye-PWM
Imodi ezenzakalelayo ye-PWM yakhelwe ukuthi ihambisane nekhodi ne-PING))) Inzwa yebanga le-Ultrasonic (#28015) ikhodi. Ingakwazi ukuxhumana nezilawuli ezincane ezingu-3.3 V noma ezingu-5 V TTL noma ze-CMOS. Imodi ye-PWM isebenzisa isixhumi esibonakalayo se-TTL esiphindwe kabili kuphinikhodi eyodwa ye-I/O (SIG). Iphinikhodi ye-SIG izoba iphansi, futhi kokubili ukushaya kwe-pulse kanye ne-echo pulse kuzoba phezulu, ku-VIN vol.tage.
| Ububanzi be-Pulse | Isimo |
| 115 kuya ku-290 µs | Isilinganiso sokunemba esincishisiwe |
| 290µs ukuya ku-12 ms | Isilinganiso esiphezulu sokunemba |
| 13 ms | Isilinganiso esingavumelekile — ithagethi isondele kakhulu noma ikude kakhulu |
| 14 ms | Iphutha lenzwa yangaphakathi |
| 15 ms | Isikhathi sokuvala senzwa yangaphakathi |
Ububanzi be-pulse bulingana nebanga, futhi abushintshi kakhulu ngezinga lokushisa elizungezile, ingcindezi, noma umswakama.
Ukuze uguqule ububanzi bokushaya kwenhliziyo ukusuka esikhathini, ku-μs, kuya ku-mm, sebenzisa isibalo esilandelayo: Ibanga (mm) = Ububanzi Bokushaya (ms) × 171.5 Ukuze uguqule ububanzi beshayela ukusuka esikhathini, ngo-μs, ukuya kumayintshi, sebenzisa isibalo esilandelayo: Ibanga (amayintshi) = Ububanzi be-Pulse (ms) × 6.752
Imodi Yedatha Ye-serial
Imodi yedatha ye-serial isebenza ku-9600 baud ngesixhumi esibonakalayo se-TTL esikabili ephinikhodi eyodwa ye-I/O (SIG), futhi ingaxhumana nezilawuli ezincane ezingu-3.3 V noma ezingu-5 V TTL noma ze-CMOS. Iphinikhodi ye-SIG izoba phezulu kule modi, ku-VIN voltage. Ukuze ushintshe usuke kumodi ezenzakalelayo ye-PWM uye kumodi ye-serial, shayela iphinikhodi ye-SIG iphansi, bese uthumela ama-pulse amathathu aphezulu angu-100 µs ano-5 µs, noma ngaphezulu, izikhala eziphansi phakathi kwawo. Lokhu kungenziwa ngokudlulisa uhlamvu olukhulu 'I'.
Ithiphu: Ukuze kusetshenziswe nezilawuli ezincane ezingasekeli uchungechunge lwe-bidirectional, imojuli ye-LaserPING ingalungiselelwa ukuthi ivuke kumodi yesiriyali. Kulokhu, okokufaka okukodwa kuphela kwe-serial-rx kuyadingeka ku-microcontroller yakho! Bheka isigaba esithi “Ukunika amandla i-serial ekuqaliseni” ngezansi.
Kumodi ye-serial, i-LaserPING izohlala ithumela idatha yokulinganisa entsha ngefomethi ye-ASCII. Inani lizoba ngamamilimitha, bese lilandelwa uhlamvu olubuyayo lwekalishi (idesimali engu-13). Inani elisha lizodluliselwa isikhathi ngasinye lapho inzwa ithola ukufundwa okuvumelekile, ngokuvamile kanye njalo ngo-45 ms.
| Inani Lomkhiqizo | Isimo |
| 50 ku2000 | Isilinganiso esiphezulu sokunemba ngamamilimitha |
| 1 ku49 |
Isilinganiso sokunemba esincishisiwe ngamamilimitha |
| 2001 ku2046 | |
| 2047 | Ukubukeka kutholwe ngaphezu kwamamilimitha angu-2046 |
|
0 noma 2222 |
Isilinganiso esingavumelekile
(Akukho ukubonisa; khomba eduze kakhulu, kude kakhulu, noma kumnyama kakhulu) |
| 9998 | Iphutha lenzwa yangaphakathi |
| 9999 | Isikhathi sokuvala senzwa yangaphakathi |
Ukumisa imodi ye-serial bese ubuyela kumodi ye-PWM ezenzakalelayo:
- Misa iphinikhodi ye-SIG iphansi, bese ubamba phansi u-100 ms
- Khipha iphinikhodi ye-SIG (ngokuvamile usetha iphinikhodi yakho ye-I/O exhunywe ku-SIG ubuyele kumodi yokufaka enokuphazamiseka okuphezulu)
- I-LaserPING manje isizoba kumodi ye-PWM
Inika amandla i-serial ekuqaliseni
Amaphedi angu-2 e-SMT amakwe ngokuthi DBG kanye ne-SCK angafushaniswa ndawonye ukuze aguqule imodi yedatha emisiwe, okuvumela imodi ye-serial ekuqaleni. Imojula ye-LaserPING ihlola isimo sezikhonkwane ze-DBG/SCK ekuqiniseni amandla.
- I-DBG ne-SCK ivuliwe = Okuzenzakalelayo kumodi ye-PWM (imodi ezenzakalelayo yasefekthri)
- I-DBG ne-SCK zifinyezwe ndawonye = Okuzenzakalelayo kumodi yedatha ye-serial
Ukuze ube mfushane amaphinikhodi amabili, i-resistor engu-0402 <4 k-ohm, isixhumanisi esiyiziro ohm, noma i-solder blob ingase ithengiswe kuwo wonke amaphedi. Bheka Izincazelo Zephedi Lokuhlola Le-SMT ngezansi ukuze uthole imininingwane kulawa maphedi. Kumodi ye-serial lapho iqalisa, inzwa ithatha cishe u-100 ms ukuqalisa, ngemva kwalokho i-LaserPING izoqala ngokuzenzakalelayo ukuthumela amanani e-serial ASCII ku-9600 baud kuphinikhodi ye-SIG. Idatha izofika ngokusakaza okuqhubekayo kwe-CR (idesimali engu-13) enqanyuliwe ye-ASCII, ngokufunda okusha ngakunye okufika cishe njalo ngo-45 ms. Lesi sikhawu esingu-45 ms sizohluka kancane, njengoba ngokwebanga elilinganisiwe, isikhathi esidingekayo ukuze inzwa ithole, ibale futhi icubungule idatha nayo izohluka kancane.
Ibanga Eliphezulu Lokushintshana Nokunemba Kokuhlukahluka
Ithebula elingezansi libonisa ukunemba okuhlukahlukene kwedivayisi, enedatha etholwe ngocingo olusebenza ekamelweni lokushisa futhi ingekho ingilazi yekhava kudivayisi. Idivayisi ingase isebenze ngaphandle kwalobu bubanzi ngokunemba okuncishisiwe.
| I-Target Reflectance Ehlanganisa Inkambu Egcwele Ye View (FoV) | Ukunemba Kwebanga | ||
| 50 kuya ku-100 mm | 100 kuya ku-1500 mm | 1500 kuya ku-2000 mm | |
| Okuqondisiwe Okumhlophe (90%) | +/- 15% | +/- 7% | +/- 7% |
| Ithagethi empunga (18%) | +/- 15% | +/- 7% | +/- 10% |
Inkambu ye View (FoV) kanye Nenkundla Yokukhanyisa (FoI)
I-emitter kanye nezakhi zomamukeli zenzwa ye-laser zakha umumo wekhoni. Inkambu ye-emitter yokukhanya (i-FoI) ingu-23°, kanti inkambu yomamukeli wokubona (FoV) ingu-55°. Inzwa ye-LaserPING izozwa kuphela izinto ezingaphakathi kwe-FoI, kodwa ingase ibe nokuzwela okunciphile lapho izinto ezikhanyayo zingaphakathi kwe-FoV. Ukufundwa kungase futhi kunganembile lapho izindawo ezibukwayo ngaphakathi kwe-FoI zisakaza ukukhanya kwezinye izinto ezingaphakathi kwe-FoI noma i-FoV.
Lapho ukala amabanga amade inzwa kufanele ibe kude ngokwanele kunoma yiziphi izitezi ezizungezile, izindonga noma uphahla ukuze kuqinisekiswe ukuthi azibi into ehlosiwe engahlosiwe, ngaphakathi kwe-FoI. Ku-200 cm ukusuka kumojula ye-LaserPING, i-FoI iyidiski engu-81.4 cm ububanzi. Ukuphakama ngaphezu kwendawo kungase kuthinte ububanzi bezinzwa ezingokoqobo, njengoba ezinye izindawo zizobonisa kunokuba ziphambuke:
Phina Izincazelo
| Phina | Uhlobo | Umsebenzi |
| GND | Ground | Indawo evamile (ukunikezwa okungu-0 V) |
| I-VIN | Amandla | Imojula izosebenza phakathi kuka-3.3V kuya ku-5V DC. I-VIN voltage futhi usetha i-logic-high level voltage yephinikhodi ye-SIG. |
| SIG | I/O* | I-PWM noma okokufaka kwedatha ye-serial / okukhiphayo |
* Uma ikumodi ye-PWM, iphinikhodi ye-SIG isebenza njengokufakwayo komqoqi ovulekile, nge-resistor yokudonsela phansi engu-55 k-ohm, ngaphandle kwama-pulses okuphendula, ashayelwa ku-VIN. Uma ikumodi yesiriyali, iphinikhodi ye-SIG isebenza njengokuphuma kokuphusha.
Ukufinyelela komsebenzisi wokugcina kwamaphedi okuhlola, ngale kokushintsha imodi yokuzenzakalelayo lapho uqalisa ukusuka ku-PWM ukuya ku-Serial, akusekelwa.
| Iphedi | Uhlobo | Umsebenzi |
| I-DBG | Vula umqoqi | Iphinikhodi yokuhlela ye-Coprocessor (PC1) |
| SCK | Vula umqoqi | Iphinikhodi yokuhlela ye-Coprocessor (PB5) |
| I-SCL | Vula umqoqi | Iwashi lenzwa ye-laser I2C elino-3.9K ukudonsela phezulu ku-3V |
| SETHA KABUSHA | Vula umqoqi | Iphinikhodi yokuhlela ye-Coprocessor (PC6) |
| I-SDA | Vula umqoqi | Idatha ye-serial yenzwa ye-Laser I2C ene-3.9K yokudonsa ukuya phezulu ku-3V |
| UMOSI | Vula umqoqi | Iphinikhodi yokuhlela ye-Coprocessor (PB3) |
| INTD | Push Donsa (okusebenzayo kuphansi) | Inzwa ye-Laser Data Ready Interrupt
Ngokuvamile okunengqondo kuphakeme, le phinikhodi ishayela phansi uma inani elisha litholakala, futhi libuyela phezulu uma inani selifundiwe. |
| I-MISO | Vula umqoqi | Iphinikhodi yokuhlela ye-Coprocessor (PB4) |
Cover Glass Selection Guide
Imojuli ye-LaserPING inembobo yokukhweza ebekwe ukuze kube lula ukufaka ingilazi yekhava ongayikhetha. Lokhu kungase kusetshenziselwe ukuvikela inzwa kwezinye izinhlelo zokusebenza, noma ukuhlola umthelela wezinto ezihlukile ezisebenza njengezihlungi ekukhanyeni kwelaser ye-infrared. Ukuze uthole ukusebenza okuhle kakhulu, imithetho elandelayo kufanele icatshangelwe ngengilazi yekhava:
- Okubalulekile: PMMA, Acrylic
- I-Spectral transmittance: T< 5% kokuthi λ< 770 nm, T> 90% kokuthi λ > 820 nm
- Igebe lomoyaawu :100m
- Ubukhulu: <1mm (okuncane, kungcono)
- Ubukhulu: kukhulu kuno-6 x 8 mm
PCB Ubukhulu
Umlando Wokubuyekeza
Inguqulo 1.0: ukukhishwa kwangempela. Kulandwe kusuka Umcibisholo.com.
Amadokhumenti / Izinsiza
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PARALLAX INC 28041 LaserPING Rangefinder Module [pdf] Umhlahlandlela Womsebenzisi 28041, LaserPING Rangefinder Module, 28041 LaserPING Rangefinder Module, Rangefinder Module, Module |
