The results of two scientific research projects of Zhejiang Metrology Institute passed expert appraisal
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[ Instrument Network Instrument Development ] August 20th, organized by China Metrology and Testing Society, China Metrology University, Inner Mongolia Autonomous Region Metrology and Testing Institute, Shanghai Metrology and Testing Technology Research Institute, Institute of Acoustics, Chinese Academy of Sciences, Institute of Acoustics, China Institute of Testing Technology The expert group composed of the leaders and researchers of the Institute of Metrology, Shandong Province, and the research and installation of the gas phase hydrogen peroxide detection and calibration method based on laser spectroscopy and the standard approximation point Sound source development and application research" two research projects to identify project results. Liu Jian, Minister of China Metrology and Testing Society, presided over the evaluation meeting. Du Zhiping, the chief engineer of Zhejiang Institute of Metrology, attended and delivered a speech.
The expert group listened to the basic situation of the project team, the overall work progress, technical route, innovative results and other reports; listened to the test team leader's report on the test situation; the calibration device for the gas phase hydrogen peroxide detector developed by the project, On-site inspection of equipment such as environmental noise monitoring system verification devices.
The project of "Research and Calibration of Gas Phase Hydrogen Peroxide Detection and Calibration Based on Laser Spectroscopy Technology" is the first in China to adopt the near-infrared TDLAS technology, long-path gas absorption cell technology and cavity ring-down spectroscopy technology to achieve high concentration gas phase in the sterilization process. Hydrogen peroxide and low concentration gas phase hydrogen peroxide remaining after sterilization were measured. The project developed a full-scale gas phase hydrogen peroxide detector. At the same time, on the basis of this, the calibration device of the gas phase hydrogen peroxide detector was developed by using mid-infrared TDLAS technology, and the invention patent authorization was obtained. The relevant local calibration specifications were formulated to fill the domestic blank of the gas phase hydrogen peroxide detector calibration.
The "Standard Approximation Point Sound Source Development and Sound Field Research" project uses acoustic waveguide theory and layered medium theory, taking into account the requirements of sound source radiation, directivity and radiation surface, and develops a standard approximate point sound source, which is realized in the frequency range of 200Hz-16kHz. The sound source frequency response curve is flat. Based on the research of the standard approximate point sound source, the calibration methods of the spatial resolution, main sidelobe suppression ratio and positioning error of the sound source localization system are studied, and a calibration device is developed to solve the problem. The traceability problem of the sound source localization system was developed. The approximate free sound field muffler was developed to solve the online measurement problem of the outdoor environmental noise automatic monitoring system. A special standing wave tube sound absorption performance test system was developed to solve the low frequency of large sound absorption materials. Test the problem. At the same time, on the basis of this, the relevant national metrological technical specifications were formulated and four invention patents were obtained.
After careful review by all the experts, it was agreed that the overall technology of the two projects reached the domestic leading level and agreed to pass the appraisal.
(Original title: The results of two scientific research projects of the Provincial Metrology Institute passed the expert appraisal)
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