TSHIAB SENSOR: 7 Kauj ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:27

Nyob zoo sawv daws!

Hluav taws kub sensor yog lub ntsuas hluav taws xob tsim los txhawm rau txheeb xyuas thiab teb rau qhov muaj nplaim taws lossis hluav taws. Ntawm no, nws yog tus lej PIN diode raws li lub ntsuas hluav taws xob uas qhib thaum nws pom hluav taws. Thermistor raws hluav taws tswb muaj qhov tsis zoo; lub tswb qhib tsuas yog tias qhov hluav taws kub rhaub lub thermistor nyob ze ze.

Kauj ruam 1: Yuav tsum kho vajtse

• CA3140 OP -AMP - 1
• CD4060 NQE - 1
• BC547 NPN TRANSISTOR - 2
• BPW34 PIN photodiode
• LED 5 hli - 3
• PIEZO BUZZER-1
• 9V roj teeb-1
• 0.22uf ceramic disk capacitor-1
• 1M ohm resistor- 3
• 1k ohm resistor - 2
• 100 -ohm resistor - 3

Kauj Ruam 2: Daim duab Circuit Court

Daim duab qhia chaw ntawm tus PIN diode raws li lub ntsuas hluav taws xob tau qhia saum toj no hauv daim duab. Nws tau tsim nyob ib puag ncig 9V roj teeb, PIN diode BPW34, op-amp CA3140 (IC1), txee CD4060 (IC2), transistors BC547, piezo buzzer thiab ob peb yam ntxiv.

Hauv Circuit Court, tus lej PIN photodiode BPW34 tau txuas nrog kev hloov pauv thiab tsis hloov pauv ntawm op-amp IC1 nyob rau hauv hom rov qab-tsis ncaj ncees los pub photocurrent rau hauv cov tswv yim ntawm op-amp. CA3140 yog 4.5MHz BiMOs op-amp nrog MOSFET cov tswv yim thiab cov zis tso zis.

Rooj vag-tiv thaiv MOSFET (PMOS) transistors hauv cov kab hluav taws xob nkag muab cov lus tawm tswv yim siab heev, feem ntau nyob ib puag ncig 1.5T ohms. IC xav tau cov tswv yim tam sim no qis heev, qis li 10pA, txhawm rau hloov pauv cov xwm txheej kom siab lossis qis.

Hauv Circuit Court, IC1 yog siv los ua transimpedance amplifier los ua tam sim no-rau-voltage hloov pauv. IC1 ua kom nrov nrov thiab hloov pauv cov duab hluav taws xob tsim tawm hauv tus lej PIN rau qhov sib piv qhov hluav taws xob hauv nws cov zis. Cov tswv yim tsis hloov pauv tau txuas nrog hauv av thiab anode ntawm photodiode, thaum cov ntaub ntawv hloov pauv tau txais photocurrent los ntawm tus lej diode.

Kauj Ruam 3: Kev Ua Haujlwm Hauv Circuit

Loj-tus nqi tawm tswv yim resistor R1 teeb tsa qhov nce ntawm transimpedance amplifier vim nws tau hloov pauv kev teeb tsa. Kev sib txuas ntawm qhov tsis hloov pauv tswv yim rau hauv av muab qhov qis impedance load rau photodiode, uas ua rau photodiode voltage tsawg.

Lub photodiode ua haujlwm nyob rau hauv hom photovoltaic uas tsis muaj kev cuam tshuam sab nraud. Kev tawm tswv yim ntawm op-amp khaws cov photodiode tam sim no sib npaug rau cov lus tawm tswv yim tam sim no los ntawm R1. Yog li cov tswv yim tawm qhov hluav taws xob vim lub photodiode tsawg heev hauv qhov kev xav ntawm tus kheej photovoltaic. Qhov no tso cai kom tau txais txiaj ntsig loj yam tsis muaj qhov tso tawm qhov hluav taws xob loj. Qhov kev teeb tsa no tau xaiv kom tau txais txiaj ntsig loj hauv qhov xwm txheej qis.

Feem ntau, nyob rau ib puag ncig teeb pom kev zoo, photocurrent los ntawm tus lej diode tsawg heev; nws khaws cov zis ntawm IC1 qis. Thaum tus lej PIN pom pom lub teeb lossis IR los ntawm hluav taws, nws cov duab hluav taws xob nce ntxiv thiab transimpedance amplifier IC1 hloov qhov tam sim no mus rau qhov tso hluav taws xob sib xws. Cov zis siab los ntawm IC1 ua rau transistor T1 thiab LED1 ci. Qhov no qhia tau tias lub Circuit Court tau pom hluav taws. Thaum T1 ua, nws yuav rov pib dua tus pin 12 ntawm IC2 rau hauv av muaj peev xwm thiab CD4060 pib oscillating.

IC2 yog lub rooj sib tham binary nrog kaum qhov tso tawm uas tig siab ib ntawm ib qho thaum nws oscillates vim C1 thiab R6. Oscillation ntawm IC2 yog qhia los ntawm qhov ntsais ntawm LED2. Thaum cov zis Q6 (tus pin 4) ntawm IC2 tig siab tom qab 15 vib nas this, T2 ua thiab qhib lub piezo buzzer PZ1, thiab LED3 kuj ci. Lub tswb rov ua dua tom qab 15 vib nas this yog tias hluav taws tseem nyob.

Koj tseem tuaj yeem qhib lub tswb AC uas ua rau lub suab nrov nrov los ntawm kev hloov PZ1 nrog kev xa xov hluav taws xob (tsis pom ntawm no). Lub tswb AC tau qhib los ntawm kev sib cuag ntawm cov xa tawm siv rau lub hom phiaj no.

Kauj Ruam 4: Schematic thiab Layout Design

PCB rau PIN-raws li lub ntsuas hluav taws xob tau tsim los siv EAGLE. Schematic thiab board-layout tau qhia saum toj no hauv daim duab.

Kauj Ruam 5: Xa Cov Ntaub Ntawv Gerber rau Chaw Tsim Khoom

Tom qab xa kuv cov ntaub ntawv GERBER los ntawm EAGLE Kuv xa lawv mus rau LIONCIRCUITS kom tau txais kuv lub rooj tsav xwm tsim khoom. Kuv ib txwm xaj kuv cov PCBs los ntawm lawv nkaus xwb. Lawv muab tus nqi qis tus qauv tsim tawm tsis pub dhau 6 hnub.

Kauj Ruam 6: Tsim Cov Phiaj Xwm

Kuv tau txais kuv lub rooj tsav xwm los ntawm LIONCIRCUITS thiab kuv tab tom faib kuv cov ntaub ntawv Gerber nrog koj yog tias leej twg xav tau lub rooj tsav xwm los tsim.

Kauj Ruam 7: Sib dhos thiab Xeem

Tom qab sib sau kuv lub rooj tsavxwm nrog cov khoom nws zoo li qhov no.

Kuaj lub Circuit Court yog ib qho yooj yim. Feem ntau, thaum tsis muaj hluav taws nplaim taws nyob ze tus PIN diode, lub piezo buzzer tsis nrov. Thaum cov nplaim hluav taws tau hnov los ntawm tus lej PIN, lub piezo buzzer suab nrov nrov. Nws qhov ntsuas pom yog nyob ib puag ncig ob meters.