Temperature
Measurenment
Kelompok A

Nama Anggota:
1. Aldi Farhan Fahrosa (20509080111024)
2. Gaizka Rifat Muzaki (205090807111025)
3. Anjani Anil Hawa (205090801111018)
4. Lutfia Vitra Erlinda (205090807111003)
5. Irzaq Irfan
(205090801111025)

Diagram Blok
-
Contents
Metode Pengukuran
1 - 3
Detail Sistem
-
4
Saran
-
2

Pada projek ini berfungsi untuk mengukur temperatur dan
mengontrol suhu pada suatu bak/wadah yang berisi air.
Menggunakan NTC untuk mengukur sekaligus memberi perintah
kepada Dimmer yang terhubung ke Heater. Heater digunakan
untuk memanaskan air menggunakan kontroler PID pada
mikrokontroler untuk mengatur frekuensi listrik yang disuplai ke
heater.
Projek

Variabel Fisis dan variabel yang dikontrol: Air Panas
Sensor : NTC
Sensor NTC dibenamkan/dicelupkan ke wadah yang berisi air dengan perubahan suhu.
Alat dan Bahan:
Alat:
1. Arduino Uno/ ESP32
2. NTC
3. LCD 16 x 2 dengan modul I2C
4. Potensiometer/ Encoder
5. Dimmer PWM
6. Modul PSU MB 102
7. Breadboard 2
8. Jumper
9. Resistor
10. Water Heater
Metode Pengukuran
Bahan:
1. Air
2. Wadah

Alat
Module Light Dimmer Lampu 220V AC 16A Input PWM 5V 3.3V Module Light Dimmer Lampu 220V AC 16A Input PWM 5V 3.3V

Alat
Arduino atau ESP 32 Potensiometer atau Rotary Encoder KY-040

Alat
PSU MB 102 Teko Pemanas Air

Alat
Breadboard Resistor dan Jumper

Diagram Blok Pengukuran
NTC
Resistor
Pembanding
ADC Pada
Mikrokontroler
LCD
Input
Output
Sensing
Element
Signal
conditioning
Element
Signal
processing
Element
Data
Presentation
Element
True
Temperature
Measured
Temperature

Diagram PID dan Proses

1. Arduino uno / ESP32
ESP 32 merupakan mikrokontroler yang dikenalkan oleh Ekspersif System
merupakan penerus dari mikrokontroler ESP8266, dimana pada mikrokontroler ini
tersedia modul WiFi yang terdapat dalam chip, sehingga sangat mendukung
dalam proses pembuatan sistem aplikasi berbasis IOT (Internet of Things)

Pin out daripada ESP 32 dapat dijadikan input ataupun output yang
berguna untuk menjalankan LCD, lampu, bahkan untuk penggerak
motor DC. Perbedaan ESP32 dengan mikrokontroler lainnya
Dari tabel perbandingan tersebut
mikrokontroler ESP32 lebih unggul,
dengan memori yang lebih besar, pin
lebih banyak, terdapat bluetooth 4.0 low
energy, serta WiFi yang sangat berguna
dalam pengaplikasian Internet of Things

2. Thermistor (Thermal Resistor) NTC (Negative Temperature Coefficient
Pada dasarnya, thermistor akan mendeteksi perubahan resistansi ketika terjadi
perubahan suhu.

3. LCD 16 x 2 dengan modul I2C
LCD (Liquid Crystal Display) 16×2 adalah salah satu media penampil
yang sangat populer digunakan sebagai interface antara mikrokontroler
dengan user nya. Dengan penampil LCD 16×2 ini user dapat
melihat/memantau keadaan sensor ataupun keadaan jalanya program.
Penampil LCD 16×2 ini dapat di hubungkan dengan Arduino

Signal Conditioning
Vo = Vs * (R0 / ( Rt + R0 ))
Pembagi tegangan (lombinasi seri) pada termistor perlu
menggunakan resistor agar dapat diproses oleh ADC
Karena Vs dan V0 konstan, tegangan output
ditentukan oleh Rt

Signal Processing
- Rt = R0 * (( Vs / Vo ) - 1)
Asumsikan Vref dan Vs sama sehingga
- adcMax / adcVal = Vs / Vo
Rasio Vin dan Vout = rasio nilai adcMax dan adVal.
Jika menggunakan ADC 10 bit, maka adcMax nya 1023
- Rt = R0 * ((adcMax / adcVal) - 1)
Misal, asumsikan thermistor dengan resistansi 10K
ohm pada 25C, 10 bit ADC, dan adcVal = 366, maka
- Rt = 10000*((1023/366)-1)
- Rt = 10000*(2.03)
- Rt = 17,951
Ketika Rt sudah didapatkan, Rt tersebut perlu
dicocokan dengan tabel pencarian yang berisi
ketahanan suhu untuk thermistornya. Dalam kasus ini,
terlihat suhunya sekitar 10C
Apabila ingin menggunakan rumus langsung,
gunakan rumus ini, dengan 25C = 298.15K dan beta
konstanta 3380 :
- 1/T = 1/T0 + 1/B * ln((adcMax / adcVal) - 1)
Sehingga
- 1/T = 1/298.15 + 1/3380 * ln((1023 / 366)-1)
- T = 10.37C

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