□ NDIR기반 유해가스 측정기술연구 본 연구를 통하여 독성가스 및 휘발성 유기화합물을 원거리에서 실시간으로 분석, 모니터링하여 경보할 수 있는 화학적 재난 모니터링시스템을 개발을 목표로 하였다. 본 연구결과로 국내게재 논문 2편, 국외 학술발표1편과 국내 학술발표 1건의 성과를 도출하였다.
□ 개방형 적외선분석 Passive method 개발 본 연구를 통하여 독성가스 및 휘발성 유기화합물을 원거리에서 실시간으로 분석, 모니터링하여 경보할 수 있는 화학적 재난 모니터링시스템을 개발을 목표로 하였다. 본 연구
□ NDIR기반 유해가스 측정기술연구 본 연구를 통하여 독성가스 및 휘발성 유기화합물을 원거리에서 실시간으로 분석, 모니터링하여 경보할 수 있는 화학적 재난 모니터링시스템을 개발을 목표로 하였다. 본 연구결과로 국내게재 논문 2편, 국외 학술발표1편과 국내 학술발표 1건의 성과를 도출하였다.
□ 개방형 적외선분석 Passive method 개발 본 연구를 통하여 독성가스 및 휘발성 유기화합물을 원거리에서 실시간으로 분석, 모니터링하여 경보할 수 있는 화학적 재난 모니터링시스템을 개발을 목표로 하였다. 본 연구결과로 국내게재 논문 2편, 국외 학술발표1편과 국내 학술발표 1건의 성과를 도출하였다.
Abstract▼
□ A study on the NDIR-based harmful gas measuring technology III. R&D execution result The objective of this R&D is to develop chemical disaster monitoring system which could analyze, monitor toxic gases and volatile organic compounds in real time from a long distance and give an alarm. As a r
□ A study on the NDIR-based harmful gas measuring technology III. R&D execution result The objective of this R&D is to develop chemical disaster monitoring system which could analyze, monitor toxic gases and volatile organic compounds in real time from a long distance and give an alarm. As a result of this R&D, achievements including the production of two prototypes, development of one correction method, one software and the application of three patents were obtained. (1) Analysis result of intellectual property right The prior art search of the patent technology trend investigation carried out by Korea Intellectual Property Strategy Institute (KIPSI) was carried out, and the examination result of three patents (tentative) obtained as the R&D result showed that these patents did not infringe preceding patents. Therefore, new IP was secured by using the previous patent technologies and limiting the field of development. (2) Establishment of Database regarding the intrinsic absorption region of chemical species creating toxic gas Chemical species creating toxic gas were measured with FT-IR spectrometer, the wavelength for each type of chemical species in the literature and the intrinsic absorption wavelength for each type of chemical species measured in the execution of this R&D were compared, analyzed and determined, and the filter for each waveform was produced in order to use for NDIR measurement sensor. (3) Development of parabolic light source for long distance As the developmental direction for measuring multi-component toxic gas, the active method, that is, the method to detect signals by aligning the light source with the detector, was selected for the direction of development to measure the multi component toxic gas, and the Pyroelectric sensor was selected for enabling the concentration analysis in various ranges. The system was established in transparent mode among active methods. Since the waveform of infrared rays is relatively longer than the waveform of visible ray, it is more easy to measure through the transparency rather than reflection.However, in order to measure in the transparent mode from a long distance, the infrared bulb with high luminance and infrared enhanced parabolic reflector are used to transmit luminance to a long distance. The-transmitted light is detected from the Pyroelectric sensor after the chemical species creating gas which exist in the measurement range are measured, and the detected micro signal is amplified through a series of processes. The measured data is transmitted to the computer through Bluetooth wireless communication and this data saved in the computer automatically. The calibration curve for converting the concentration correctly was inserted into the hardware processor-based system, and other chemical species were corrected in the software in order to improve the accuracy additionally. (4) Study on the applicability of bluetooth communication for remote monitoring The microprocessor was applied to send signals to the control computer and measure toxic gas for remote monitoring. The applied communication method is bluetooth communication and it is expected that this technology can be applied usefully for field installation. 2.45 GHz which was ISM frequency band was used for bluetooth. In case of versions 1.1 and 1.2. the communication speed is 723.1 kbps, and version 2.0 features EDR (Enhanced Data Rate) which enables the speed of 2.1 Mbps. The applied bluetooth supports SPP (Serial Port Protocol) mode and it can be connected to various MPU through the serial (TTL 232C) for implementing the bluetooth communication. For parameter setting of module, the use of AT command to change RS232C speed, access password and access name easily was selected.
□ Development of Passive method by Open Path FT-IR III. R&D Result The objective of this R&D is to develop chemical disaster monitoring system which could analyze, monitor toxic gases and volatile organic compounds in real time from a long distance and issue an alarm. As a result of this R&D, two theses were registered and one thesis presentation in international conference was made. (1) Establishment of large space experimental equipment In order to facilitate the measurement of infrared waves from a long distance, Passive open path FT-IR spectrometer (SIGIS model, Bruker in Germany) consisting of infrared camera, self-produced standard gas dilution system and gas chamber (attached with ZnSe window) were established and the experiment was carried out. (2) Passive open-path FT-IR spectrometer toxic gas application experiment VOCs chemical species were measured using the passive open path FT-IR spectrometer and the qualitative analytical peak assignment relating to spectrum was carried out. The U.S. NIST D/B based VOCs spectrum's intrinsic absorption field was confirmed and the long distance Styrene and Benzene's spectrum absorption were measured with SIGIS equipment. (3) Measurement of VOCs interference effect in Passive Mode SIGIS equipment is developed in Germany for measuring gas detected in a large space from a long distance but there was no library for quantitative analysis, so D/B regarding VOC chemical species was established and the quantitative method was developed in this R&D. It was confirmed from the observation in the whole infrared region that volatile organic compounds created vary similar absorption. Therefore, it is considered that there is a limit in the qualitative and quantitative analysis of various gases through the separate spectrum D/B establishment. In order to improve the precision and accuracy of passive analysis, it is necessary to introduce the correction method using the statistical processing technique that could minimize the interference.In case of imported equipment, domestic users are not authorized to access software.Therefore, it is expected that the performance and price competitiveness will be secured through the development of monitoring equipment produced in the country.
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