Shanghai successfully developed high-sensitivity explosive detectors Recently, the SIM series explosive detectors, which are more sensitive than sniffer dog noses, were successfully developed at the Shanghai Institute of Microsystems and Information Technology, Chinese Academy of Sciences, and passed the Ministry of Public Security ’s safety and police electronic products. Performance testing of the quality monitoring center. A few days ago, the Physical Evidence Appraisal Center of the Ministry of Public Security issued the “Letter on the Promotion of“ SIM06 Trace Explosive Detector â€â€, recommending that all provinces, autonomous regions, municipalities directly under the Central Government, the Public Security Department, the Bureau of Fire Control (bureau, headquarters), and the Frontier Defense Bureau (section, headquarters ) Promotion and use. It is reported that the SIM series trace explosive detector developed by the institute is a high-tech product with completely independent intellectual property rights in China, which can be used for TNT nitro explosives, ammonium nitrate explosives, Octokine, plastic explosives, emulsification Nine common explosives including explosives, Class B explosives, ammonium antimony explosives, PW0 explosives, and PW30 explosives are traceable. The detection limit reaches 4ppt. Their sensitivity far exceeds that of sniffer dogs. Safety and security work can be used for explosion protection and security inspection of urban buses, railways, airports, stadiums, government departments, important meeting places, key buildings, customs / checkpoints, ports / terminals, letters / postages, etc. "Shanghai Rail Transit Security Standards" requires that each station of Shanghai Rail Transit should compulsorily place sensors for the detection of explosives and hazardous chemicals. It is reported that the SIM07 trace explosive detector developed by the institute will soon be put into use in three demonstration stations of Shanghai Metro Line 8. The leaders of the security department of the Shanghai World Expo Bureau also fully affirmed the performance of the SIM series of explosive detectors developed by the institute, saying that the SIM series of explosive detectors will play an important role in the explosion prevention and security inspection of the 2010 Shanghai World Expo. Cheng Jiangong, a researcher at the Shanghai Institute of Microsystems and Information Technology, introduced to the Science Times that SIM series trace explosive detectors use fluorescent polymer sensing technology, which is based on some special fluorescent polymers such as TNT and other explosive molecules. Fluorescence quenching effect. When target explosive molecules such as TNT are combined with polymer molecules, the fluorescence emitted by the polymer changes instantly. By detecting the fluorescence intensity of the polymer, you can know whether there are explosive molecules such as TNT in the surrounding environment. It is reported that only the United States has this technology in the world, but the United States imposes a technical blockade on China. Most of the trace explosive detectors currently used in China are ion mobility spectrometry detectors imported from the United States. Compared with ion mobility spectroscopy, fluorescent polymer sensing technology has higher sensitivity and better selectivity, and is considered to be one of the best technologies for trace detection and detection. Cheng Jiangong said that the X-ray machines currently used in airports and railway stations are very effective for dangerous goods with regular shapes, such as firearms and knives, but they are not ideal for detecting explosives in irregularly packed shapes. The SIM series of explosive detectors developed by the institute are like sniffer dogs, which recognize the volatile odor of explosives, and are very effective for the detection of irregularly packed explosives. The Shanghai Institute of Microsystems and Information Technology has been developing high-performance explosive detectors since July 2005 to provide technical support for biochemical counter-terrorism. The research was supported by the National "863" Program, the Chinese Academy of Sciences "Hundred Talents Program", the Academy's major directional projects, the Shanghai Science and Technology Commission Innovation Team Project, the Shanghai Pujiang Talents Program, and the Shanghai Municipal Science and Technology Commission Basic Priorities and other projects. The research results have applied for multiple national invention patents. According to reports, in order to greet the six-nation summit of the Shanghai Cooperation Organization in Shanghai on June 13, 2006, the Shanghai Rail Transit Public Security Bureau held an anti-terrorism exercise at the Lujiazui subway station on June 8. In the exercise, the developed SIM06-I trace explosive detector was compared with the sniffer dog equipped with rail transportation. The results showed that the SIM06-I explosive detector was given in less than 1 minute. Alarm, the reaction speed is significantly faster than the sniffer dog. In view of its good performance during the exercise, during the entire summit from June 13 to June 16, the SIM06-I trace explosive detector developed by Microsystems was used in the Lujiazui subway station for explosion物 测。 Object detection. Cheng Jiangong said that at present his research group is developing higher-sensitivity trace explosive detectors in order to realize the detection of explosives at longer distances.
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