Yooj Yim LED Digital Kub Sensor: 3 Cov Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:28

Ib qho yooj yim, Tus nqi qis, Digital Electronic Kub Kub Sensor

H. William James, Lub Yim Hli, 2015

Abstract Blinking LEDS muaj cov IC me me uas ua rau lawv txuas ntxiv ntsais muag thiab tawm thaum siv qhov hluav taws xob. Txoj kev tshawb no qhia pom tias qhov ntsais ntsais yog nyob ntawm qhov kub yog tias qhov siv hluav taws xob hla LED tseem nyob tas li. Yog li, qhov ntsais LED tuaj yeem siv los ntsuas qhov kub thiab muab cov digital tso tawm.

Taw qhia

Lub Teeb Emitting Diodes (LED) tuaj ntau yam duab thiab tso ntau yam xim. Lwm hom LED yog ntsais muag lossis flashing LED. Cov no yog LEDs nrog me me IC multivibrator nti teeb sab hauv uas ua rau LED pib ntsais muag thaum txuas nrog lub zog siv. Cov ntsais muag LEDs tuaj yeem yuav tau tsawg dua ib daus las txhua thiab tuaj hauv ntau yam xim.

Tus naj npawb ntawm LED teeb ib feeb lossis qhov ntsais ntawm LED tsis tas li. Nws yuav txawv nrog qhov kev hloov pauv tseem ceeb hauv kev siv hluav taws xob (qis dua qhov hluav taws xob = nrawm dua thiab rov ua dua). Txawm li cas los xij, kev tshawb fawb los ntawm tus kws sau ntawv, pib xyoo 2010, pom tias tus nqi flash ib feeb twg txawv qhov sib txawv thiab raug nrog qhov hloov pauv kub. Raws li qhov kub tau txo qis (nce ntxiv) qhov ntsais ntawm LED nce (txo qis). Liab LEDS ntsais muag nrawm tshaj plaws, thaum daj daj ntsais qeeb dua thiab ntsuab ntsuab txawm tias qeeb qeeb dhau lub sijhawm muab.

Siv lub ntsais ntsais LED los ntsuas qhov kub thiab txias

Txhawm rau ntsuas qhov kub kom raug nrog lub ntsais ntsais LED, yuav tsum muaj qhov hluav taws xob qhov hluav taws xob tas li. A 2 txog 6V DC lub zog xa khoom los ntawm AC phab ntsa qhov hluav taws xob tuaj yeem muab hluav taws xob ruaj khov hla lub ntsais ntsais LED tso ua ke nrog 10 txog 30 Ohm resistor. Yog tias siv roj teeb, qhov hluav taws xob tuaj yeem ruaj khov los ntawm kev siv lub ntsuas hluav taws xob IC nti hla lub roj teeb.

Raws li LED ntsais ntsais qhov hluav taws xob poob hla nws txawv. Txhawm rau kaw qhov ntsais ntawm LED nws tuaj yeem tsim ua rau hauv Circuit Court uas suav thiab txawm tias nthuav tawm thiab kis tus lej ntawm ntsais (thiab qhov kub) uas tshwm sim nyob rau lub sijhawm xws li ib feeb. Hauv txoj kev tshawb fawb no, lub ntsais ntsais LED tau suav nrog hauv qhov yooj yim, suab-oscillator Circuit. Raws li LED ntsais muag thiab tawm, tus oscillator tso suab "suab nrov" rau tus hais lus. Daim ntawv thov software lossis App, "LiveBPM", uas qhia txog cov neeg ntaus ib feeb twg ntawm zaj nkauj, khaws cov suab nrov no thiab suav thiab qhia lawv li ntaus ib feeb (BPM). Saib daim duab 1. Daim phiaj ntsuas ntsuas lossis cov lus qhia pom lub suab beep piv rau qhov ntsuas kub tso cai rau ntsuas qhov ntsuas kub los ntawm cov zaub.

LED ntsais tus nqi piv rau qhov hloov pauv kub

Daim duab 2 qhia pom cov phiaj xwm ntawm qhov ntsais muag ib qhov kev hloov pauv kub rau ob lub teeb daj ntsais LEDs. LED tau muab piv rau qhov ntsuas hluav taws xob digital digital uas raug tso nyob ze. Nco tseg hauv daim duab tias kev ntsuas ntsuas yog tawm ntawm tsawg kawg +16 txog ze -20C. Tshaj li qhov ntsuas no, qhov ntsuas kub hloov pauv yog li 0.95C/ntsais rau lub teeb daj.

Daim duab 3 qhia txog qhov ntsais ntsais ib feeb rau qhov daj ntsais LED los ntawm +35.2 txog -18.5C. Qhov zoo tshaj logarithmic nkhaus tau ntxiv (kab nyias). Tus nqi tag nrho ntawm kev hloov pauv yog kwv yees li 1C/blink.

Cov LEDs tau sim rau lub hlis thiab qhov ntsuas ntsuas tseem ruaj khov. Siv LiveBPM, ib tus tuaj yeem txheeb xyuas qhov hloov pauv kub nyob ze 0.1C. Qhov tseeb ntawm qhov ntsais ntsais LED nyob ib puag ncig +/- 0.5C los ntawm yam tsawg +35 txog -20C. Lub sijhawm ntsuas kub ntawm lub ntsuas cua tsis qeeb. Tom qab tshem tawm ntawm lub tub yees qhov twg nws txias dua -15C, lub ntsuas tau zoo rov los rau +17C hauv ob peb feeb xwb. Tshem tawm cov yas yas npog LED pab kom nrawm lub sijhawm teb. Kev ntsuas ntxiv LEDS hla qhov ntsuas kub dav dua yuav ua tiav thiab tshaj tawm hauv lub vev xaib no.

Dab tsi ua rau LED ntsais tus nqi hloov nrog qhov kub tsis pom tseeb. Kev hloov pauv kub cuam tshuam rau kev ua haujlwm ntawm diodes, resistors, thiab capacitors. Cov khoom no yog sab hauv LED thiab IC nti. Lwm qhov muaj peev xwm yog tias cov khoom siv LED tau hloov pauv lub cev (piv txwv li, nthuav dav thiab cog lus) nrog kev hloov pauv kub thiab qhov no hloov pauv IC Circuit, ua rau muaj kev hloov pauv ntsais muag.

Cov lus xaus

LED ntsais tuaj yeem siv los ntsuas qhov kub tau yooj yim. Qhov ntsuas kub hauv qhov kev tshawb fawb no qhia tau tias nws feem ntau yog linear los ntawm +35 txog -20C. Kev ntsuas ntxiv yuav ua tiav qhov ntsuas kub dav dua thiab cov txiaj ntsig tau tshaj tawm hauv lub vev xaib no. Lub teeb ntsais muag LED tso cai rau yooj yim dua, txo tus nqi hluav taws xob tsim hluav taws xob los ntsuas thiab ntsuas kub.

Cov duab

Daim duab 1. LiveBPM App tso saib "ntaus ib feeb". Txawm li cas los xij, ntawm no nws tab tom ntsuas qhov ntsuas kub hloov pauv li ntawm 30 feeb los ntawm lub teeb liab ntsais LED tso rau hauv lub suab oscillator Circuit. Tus nqi hloov pauv rau tus liab LED yog li 0.84C/blink

Daim duab 2. Qhov ntsuas ntsuas ntsuas kub rau ob lub teeb daj daj. X-axis yog kub (degrees C) thiab Y-axis yog qhov ntsais ntawm LED thaum 1 feeb. LiveBPM software tau siv los txiav txim siab qhov ntsais ntawm LEDs.

Daim duab 3. Calibration cov phiaj rau ib qho daj ntsais LED. X-axis yog ntsais ib feeb thiab y-axis yog kub (C) thiab txhua cov ntaub ntawv taw qhia qhia qhov ntsuas kub. Txoj kab dub dub yog qhov zoo tshaj plaws haum logarithmic nkhaus.

Cov ntaub ntawv:

Teeb Emitting Diode:

Kev ntsuas kub ntawm diodes:

en.wikipedia.org/wiki/Diode#Temperature_measurements

LiveBPM:

Kuv lwm lub vev xaib,

Cov Khoom Huab Cua Hauv Tsev

Homemade Loj Lub Koob Yees Duab

Homemade Kub Kua Txob Sauce

Copyright 2016: HW James