표제지
목차
國文要略 12
I. 서론 13
1.1. 연구배경 13
1.1.1. 연구개요 및 목표 13
1.1.2. 수면산업의 성장 전망 14
1.1.3. 연구의 기술적 필요성 17
1.1.4. 연구의 사회적 필요성 17
1.2. 수면장애 및 수면유도장치 19
1.2.1. 수면의 개념 19
1.2.2. 수면장애의 개념 20
1.2.3. 수면장애로 인한 건강 24
1.2.4. 수면유도장치 26
II. 본론 29
2.1. 연구방법 29
2.1.1. 수면 유도에 적합한 CO₂ 농도 산출 29
2.1.2. 기초 실험 결과 30
2.1.3. 유체 혼합 방법 분석 36
2.2. 설계 및 해석 41
2.2.1. 온도에 따른 혼합가스 확산 시뮬레이션 및 결과 41
2.2.2. 안면부 거리에 따른 확산 시뮬레이션 결과 45
2.2.3. Reserve Tank 설계 및 해석 결과 48
2.3. 시제품 제작 및 시험 53
2.3.1. Reserve Tank 시제품 제작 및 시험 53
2.3.2. 실험을 통한 변수 DB 구축 56
2.3.3. 분사구 형상 설계 및 실험 60
2.3.4. 수면 유도장치 제작 62
2.3.5. 인증 시험 66
2.3.6. 수면 다원화 검사 69
III. 결론 72
References 74
Abstract 83
Table 1. Classification of sleep disorders 23
Table 2. Characteristics of sleeping medicines and sleep aids 27
Table 3. CO₂ gas diffusion measurement results 33
Table 4. Unit conversion according to temperature change 42
Table 5. Concentration as a function of temperature and flow rate 43
Table 6. Concentration change result according to distance 47
Table 7. Mass fraction according to the reserve tank case 52
Table 8. Variables for building experimental DB 56
Table 9. DB construction result through test 59
Table 10. Name of each part. 62
Table 11. Average experimental value of carbon dioxide at the tip of the nozzle 66
Table 12. Average experimental value of carbon dioxide at 25cm distance from the nozzle 67
Table 13. Results of changes in sleep time required 70
Fig. 1. The increase in the number of sleep disorder patients and the size of the sleep market 15
Fig. 2. Classification and scope of the sleep industry 16
Fig. 3. The social cost of sleep deprivation 18
Fig. 4. Examples of general adult sleep structure 19
Fig. 5. Principle of sleep induction using CO₂ 28
Fig. 6. Location of 5 by 5 CO₂ sensor for basic experiments 30
Fig. 7. CO₂ mixture gas injection position for securing experimental data 31
Fig. 8. DC power supply for fan flow rate control 31
Fig. 9. Proportional control valve for CO₂ pressure control 32
Fig. 10. CO₂ cylinder for mixed gas experimental 32
Fig. 11. 25cm Measurement result of case 1 34
Fig. 12. 25cm Measurement result of case 2 34
Fig. 13. 25cm Measurement result of case 3 35
Fig. 14. Sleep induction device concept design 36
Fig. 15. Gas mixer structure example 37
Fig. 16. Static mixer structure example 38
Fig. 17. Structure example of venturi throat 39
Fig. 18. Structure example of Reserve tank 40
Fig. 19. Modeling for CO₂ diffusion analysis 41
Fig. 20. Diffusion results with distance at 25℃ 44
Fig. 21. Diffusion results with distance at 18℃ 44
Fig. 22. Concentration change at 150mm distance 46
Fig. 23. Concentration change at 450mm distance 46
Fig. 24. Structure of case 1 48
Fig. 25. Structure of case 2 49
Fig. 26. Structure of case 3 49
Fig. 27. Concentration distribution in case 1 50
Fig. 28. Concentration distribution in case 2 51
Fig. 29. Concentration distribution in case 3 51
Fig. 30. Maximum mass fraction of the reserve tank 52
Fig. 31. Prototype of case 1 for mixed gas experiment 53
Fig. 32. Prototype of case 2 for mixed gas experiment 54
Fig. 33. Prototype of case 3 for mixed gas experiment 54
Fig. 34. Reserve tank with final design applied 55
Fig. 35. Schematic diagram of experimental device for measuring mixed gas 57
Fig. 36. Experiment equipment for mixed gas measurement 57
Fig. 37. 4V 0.1bar 370pwm result 58
Fig. 38. 5V 0.2bar 450pwm result 58
Fig. 39. 6V 0.3bar 500pwm result 59
Fig. 40. Structure for measuring mixed gas according to nozzle length 60
Fig. 41. Results with or without mesh installation 61
Fig. 42. Concentration results according to nozzle length 61
Fig. 43. Sleep inducer 3D design 62
Fig. 44. Reserve tank design with improved noise 63
Fig. 45. Reserve tank with silencer 63
Fig. 46. PCB circuit structure 64
Fig. 47. The final completed sleep induction device 65
Fig. 48. Accredited certification test data 68
Fig. 49. Clinical trial environment/reading room and sleeping room 70
Fig. 50. Sound measurement kit and sleeping environment kit 71
Fig. 51. Example of polysomnography test 71