M1GP Hyeonjae Ju

1. May 11. 2013 AudioDAQ:Turning the Mobile Phone’s Ubiquitous Headset Port into a Universal Data Acquisition Interface Sonal Verma, Andrew Robinson, and Prabal Dutta 発表者：浅見・川原研 M1 ジュヒョンジェ 1 Saturday, May 11, 13

2. Sensors Integrated into the Phone ✤ Accelerometers ✤ Gyroscopes ✤ Imagers 2 Saturday, May 11, 13

3. Sensors Integrated into the Phone ✤ Accelerometers ✤ Gyroscopes ✤ Imagers EKG Sensor Air Quality Sensor Soil Moisture Sensor 2 Saturday, May 11, 13

4. Sensors Integrated into the Phone ✤ Accelerometers ✤ Gyroscopes ✤ Imagers EKG Sensor Air Quality Sensor Soil Moisture Sensor 2 Saturday, May 11, 13

5. Mobile Phone’s Headset Port 3 Saturday, May 11, 13

6. Mobile Phone’s Headset Port 3 Saturday, May 11, 13

7. Mobile Phone’s Headset Port 3 ✤ Mostly standardized across many mobile phone’s Saturday, May 11, 13

8. Existing Phone Peripheral Interfaces ✤ Square card reader ✤ RedEye mini 4 Saturday, May 11, 13

9. Existing Phone Peripheral Interfaces ✤ Square card reader ✤ RedEye mini 4 What works for sporadic activities does not scale well to continuous sensing Saturday, May 11, 13

10. What is the AudioDAQ ? 5 Saturday, May 11, 13

11. What is the AudioDAQ ? ✤ A new platform for continuous data acquisition using the headset port of a mobile phone. 5 Saturday, May 11, 13

12. What is the AudioDAQ ? ✤ A new platform for continuous data acquisition using the headset port of a mobile phone. Cost Simplicity Ubiquity 5 Saturday, May 11, 13

13. Design ✤ ① Hardware Interface ✤ ② Mobile Phone ✤ ③ Processor ✤ ④ End User Applications 6 Saturday, May 11, 13

18. Hardware Interface (1) ✤ Microphone Bias as Power Source 7 Saturday, May 11, 13

19. Hardware Interface (1) ✤ Microphone Bias as Power Source 7Low pass ﬁlter Saturday, May 11, 13

20. Hardware Interface (1) ✤ Microphone Bias as Power Source 7Low pass ﬁlter Scaling resistor Saturday, May 11, 13

21. Hardware Interface (2) ✤ Acquiring analog sensor data 8 Saturday, May 11, 13

22. Hardware Interface (2) ✤ Acquiring analog sensor data 8 1.2 kHz Saturday, May 11, 13

23. Hardware Interface (2) ✤ Acquiring analog sensor data 8 1.2 kHz Saturday, May 11, 13

24. Hardware Interface (1) ✤ Acquiring analog sensor data 9 Saturday, May 11, 13

25. Hardware Interface (1) ✤ Acquiring analog sensor data 9High pass ﬁlter Saturday, May 11, 13

26. Capturing and Storing Data ✤ iOS ✤ Advanced Audio Coding (AAC) - 44.1 kHz ✤ Android ✤ Adaptive Multi-rate (AMR) - 8 kHz ✤ Others ✤ Adaptive Multi-rate (AMR) - 8 kHz 10 Saturday, May 11, 13

27. Processing Sensor Data ✤ Decoding ✤ Edge Detection ✤ Value Estimation ✤ Framing 11 Saturday, May 11, 13

31. Low-Power EKG Sensor (1) 12 ✤ Block Diagram of the EKG Sensor System Saturday, May 11, 13

32. Low-Power EKG Sensor (1) 12 ✤ Block Diagram of the EKG Sensor System 16$ Saturday, May 11, 13

33. Low-Power EKG Sensor (1) 12 ✤ Block Diagram of the EKG Sensor System 8$ Saturday, May 11, 13

34. Low-Power EKG Sensor (2) 13 The AudioDAQ board interfaced with 2-lead EKG sensor Saturday, May 11, 13

35. Low-Power EKG Sensor (2) 13 EKG trace of an individual Saturday, May 11, 13

36. Low-Power EKG Sensor (2) 13 EKG trace of an individual P Wave Saturday, May 11, 13

37. Low-Power EKG Sensor (2) 13 EKG trace of an individual Q Wave Saturday, May 11, 13

38. Low-Power EKG Sensor (2) 13 EKG trace of an individual QRS complex Saturday, May 11, 13

39. Low-Power EKG Sensor (2) 13 EKG trace of an individual T wave Saturday, May 11, 13

40. Low-Power EKG Sensor (2) 13 EKG trace of an individual P P Q Q R R S S T T Saturday, May 11, 13

41. Evaluation - System functionality and Power consumption 14 Phone Works Power Sourced Power Drawn Battery Capacity Battery Life (est.) iPhone4 Yes 322!W 149mW 5254mW 35 hr Nexus One Yes 168!W 267mW 5180mW 19 hr Galaxy Nexus Yes 247!W 301mW 6475mW 21 hr N900 Yes 120!W 270mW 4884mW 18 hr E71 Yes 90!W 189mW 5550mW 29 hr Saturday, May 11, 13

46. Evaluation - Signal Recovery and Distortion 15 A voltage sweep The error component Saturday, May 11, 13

47. Limitation ✤ Power Budget ✤ Coupling of Power and Data ✤ Sampling Rate 16 Saturday, May 11, 13

48. Conclusion ✤ AudioDAQ ✤ Low cost ✤ Simple, ubiquitous and universal ✤ Low-rate analog sensor data capture, storage, and delivery 17 Saturday, May 11, 13

49. Thank you for listening 18 Saturday, May 11, 13

M1GP Hyeonjae Ju

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