專題的動機來自於: 教室無空氣通風換氣設計，儘管老師很努力教學，可能因為同學人數眾多，CO2濃度過高，造成學習成效打折，因此希望有便宜的偵測裝置，來提醒老師和同學開門窗，解決非智力和意志力的障礙。 The main target is to use Embeded uC to do analog input Voltage conversion to digital value (may include linearization and temperature compensation) and then send out digital CO2 concentration value through Bluetooth/Wifi module (using UART) to Raspberry Pi2 board. Since PM2.5 sensor and LPG sensors are also easy to be integrated into the same CO2 detector, so they were also adopted for extended values of this detector. To save power, PM2.5 detector could be designed to use very small power by using duty cycle control, and this happen to add a little bit more complexity on the practice of programming the Cortex-M.

1. 空氣品質感知物聯網之實作
105 嵌入式軟體設計工程師人才養成班
指導老師 : Joseph
組長 : 丘台傑
組員：曾振恆、秦貞德、黃子祥、江支豪、石翠娥、劉宇登、彭俊傑
日期 : 2016.11.4

2. 報告大綱
 專題研究動機
 系統設計
 硬體架構
 軟體架構
 軟體運作流程圖
 案例 : 空氣懸浮微粒
 Q&A
2

3. 專題研究動機
知道您 嗎 ? 室內空氣汙染比室外更危險 !
LPG 氣體濃度
專注力下降
CO2 二氧化碳濃度 室內懸浮微粒源
溫度濕度

4. 系統設計
4

5. PM10
Sensor
Temperature
Sensor
Cortex-Mo
Humidity
Sensor
CO2
Sensor
Cortex-Mo
Pi 2
UART
GAS
Sensor
device
ID=1
device
ID=0
Gateway
硬體架構
Cloud
mbed connector
UART
Ethernet
5

6. Outline
 專題緣起 / 引言 Preface
 系統設計目標 / 實現的目的 System Design
Target
 專題硬體架構圖 H/W Blocks
 專題軟體架構圖 Software Blocks
 空氣懸浮微粒
 軟體運作流程圖 / 實驗數據圖
Flowchart/Result
 參考文獻
 訓後感言分享 Appreciati
6

7. Software Dev. of PM10 Sensor
經經 ADCADC 取得資料取得資料
產生產生 PM10PM10 感測器感測器
控制信號控制信號
倍數及單位轉倍數及單位轉
換換
經藍芽傳送至經藍芽傳送至
GatewayGateway

8. PM10 measured waveform
PM10 Signa receiving timing adjusting
8

9. ADC_mV PM10 ug/(m^3)
600 0
1200 100
1800 200
2400 300
3000 400
))6003000/(400(
*)600)((
)3^/(10
mVmVug
mVmVADC
mugPM
−
−<>
PM10 Analog to Digital Conversion
9

10. PM2.5/PM10 WHO Value
Ittraining Lab
real data
Next: BT interface Programing10

11. BT interface programing_PM10
CO2 LPGPM10
HumidityTemp.
Sensor C Application
GPIO UART
Device MCU
ADC
Linux-Core / Driver
IP StackThread/Time Interrupts
mbed Client C/C++ APIS
Sensor Data Receiver Application
GPIO UART Ethernet
Gateway Pi2
USB
NEXT: mbed-connector API11

12. mbed-Web API real-time Monitoring
Next : WebAPI 12

13. mbed-Web API real-time Monitoring
Next : WebAPI 13

14. All Sensor Types:
本次實作採用的 Sensor
項
目
型號
使用
電壓
量測範圍
訊號
種類
CPU (M3)
Pin
MtConnect
04S
Pin ( 規劃 )
用途
1 DHT11 5 V
0~50 ℃
20 ~ 90
％ RH
5V
Serial
PA10
(GPIO)
P0_01
(AIN2)
溫 / 濕度
2 SEN0144
(Sharp GP2Y1010AU)
5V
10~500
ug/m^3
5V Digital
5V Analogy
PD0
PA0
P0_01 (LED)
P0_03 (AIN04)
Dust 濃度
Air purifier, Air
conditioner, Air
monitor
3
SEN0159
(MG811)
5V
350 ~ 10000
ppm
5V
Analogy
PA4
(ADC04)
P0_04
(AIN5)
CO2 濃度
4
SEN0131
(QM6)
5V
300 ~ 10000
ppm
5V
Analogy
PA5
(ADC5)
P0_05
(AIN6)
Propane, Butane
and LPG, also
response to
Natural gas.
14

15. Q&A
15