초록

○ 연구결과
-2중 관경로 및 높은 광 효율성을 갖는 광 동파관 설계
-이산화탄소 및 에틸렌 검지용 광 검출기 개발 및 제작
-동시측정가능 광원의 선정
-너 노이즈 고증폭 회로 설계 및 안정화 회로 설계
-마이컴 개발 및 교정 알고리즘 등 소프트웨어 개발

Abstract ▼

Ⅳ. Results of Research Development
To develop complete CO₂ & ethylene multi-gassensors for CA, following research development have been executed and used for product development.
To design the optimal optical cavity, parameters of the optical cavity have been set to one light source

Ⅳ. Results of Research Development
To develop complete CO₂ & ethylene multi-gassensors for CA, following research development have been executed and used for product development.
To design the optimal optical cavity, parameters of the optical cavity have been set to one light source and two pyroelectric detectors; the optimal optical path has bee nsimulated to design the optical cavity of multi-sensors. Optical characteristics and estimated sensor specifications have been calculated to design the optical cavity. Patent for the optical vavity that has both independent long and short light path has been applied.
Implemented gas detector included pyroelectric with 4.26um peak absorption to detect CO₂ and with 10.54um to detect ethylene. Theoretically, thermopile may be used considering the characteristics of both gases, but in reality, the detection of ethylene is not easy. After trials and errors, pyroeletrics have been adopted for both detectors.
To use a single light source, IR source with high output with bandwith of 2~16um has been used to complete the design of detection parts.
After determining the appropriate micom to develop the circuits, two output signals of CO₂ (CO₂&reference) and two output signals of ethylene (ethylene&reference) have been converted through amplification circuit with 1mV noise and diminished circuit that reacts to the operation of the light source.
Circuits that calibrates temperature have been designed. Software that controls all circuits has been designed as well as temperature and humidity calibration algorithms through each signal from the sensor.
Performace and reliability tests of the developed products showed the accuracy of ±5% for CO₂ and ±5% for ethlene respectively; response time was (1/e) 40 seconds. Furthermore, stable performaces have been proved against extreme temperature /humidity, supporting their reliability to be manufactured and distributed for commonus age.

목차 Contents

• 표 지 ... 1
• 제 출 문 ... 2
• 요 약 문 ... 4
• SUMMARY ... 8
• CONTENST ... 12
• 목 차 ... 14
• 제 1 장 연구개발과제의 개요 ... 16
• 제 2 장 국내외 기술개발 현황 ... 21
• 제1절. 에틸렌과 이산화탄소 ... 21
• 제2절. CA에서 에틸렌센서와 이산화탄소 센서 ... 24
• 제 3 장 연구 개발수행 내용 및 결과 ... 31
• 제1절. 연구개발의 중점 포인트 ... 31
• 제2절. 가스 검지 방식의 개괄적 연구 ... 32
• 제3절. 비분산 적외선(NDIR ; Non-dispersive Infrared) ... 35
• 제4절. 이산화탄소 및 에틸렌 가스 물성 분석 ... 42
• 제5절. 이산화탄소+에틸렌 멀티가스 센서의 제작 ... 46
• 제6절. 과제의 수행 ... 60
• 제7절. 성능 시험 및 환경 시험 자료 ... 79
• 제8절. 성능 및 환경 시험 결과 ... 88
• 제9절. 시험결과 종합 및 도출된 제품사양 ... 98
• 제 4 장 목표달성도 및 관련분야에의 기여도 ... 99
• 1. 목표달성도 ... 99
• 제 5 장 연구개발 성과 및 성과활용 계획 ... 100
• 제 6 장 연구개발과정에서 수집한 해외과학기술정보 ... 102
• 제 7 장 참고문헌 ... 104
• 끝페이지 ... 105