Dual-mode dangerous chemical detection sensor
A technology for hazardous chemicals and detection sensors, applied in the field of hazardous chemicals detection, can solve the problems of complex structure, high detection cost, inaccuracy, etc., and achieve the effects of small size, high detection sensitivity, and increased detection capability.
Active Publication Date: 2021-03-26
YANCHENG INST OF TECH
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Problems solved by technology
[0007]The purpose of the present invention is to provide a dual-mode hazardous chemical detection sensor to solve the problem of complex structure, high detection cost and inability to detect micro-trace hazardous chemical detection equipment. Accurate and rapid detection of problems
Method used
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Embodiment 1
[0049] This embodiment further illustrates the dual-mode dangerous chemical detection sensor of the present invention in conjunction with the detection of p-nitrobenzene.
[0050] Place the dual-mode hazardous chemical detection sensor module in a sealed chamber with gas inlet / outlet, and flush the sensor with high-purity nitrogen as a carrier gas until a stable baseline is obtained. Then, a specific gas is introduced into the chamber, and after tens of seconds, a stable frequency response can be obtained. At the end of each measurement, the carrier gas was reintroduced to ensure that the baseline had returned to its original level. These measurements are all performed at room temperature. After absorbing nitrobenzene on the surface of MOFs sensitive film, the sensor generation frequency will decrease. The data acquisition circuit collects the frequency information, and obtains the concentration of the detected gas after being processed by a single-chip microcomputer.
[00...
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The invention belongs to the technical field of dangerous chemical detection, and particularly relates to a dual-mode dangerous chemical detection sensor. The detection sensor comprises a dual-mode sensitive element, the dual-mode sensitive element comprises a quartz crystal sheet and a fluorescent film material, and the dual-mode sensitive element is used for identifying and quantifying dangerouschemicals and emitting fluorescence. The detection sensor further comprises a lens element, a CCD (Charge Coupled Device) detector, a laser and a lightproof sealing cavity, when the sensor works, light emitted by the laser is transmitted to the collimating micromirror through the tail fiber and then enters the fluorescent film material to excite fluorescence, and the fluorescence is projected onthe CCD detector after passing through the biconvex lens. The MOFs material used in the dual-mode dangerous chemical detection sensor has remarkable advantages when being used for detecting dangerouschemicals such as nitro aromatic compounds and the like, is high in detection sensitivity, can be used for detecting various dangerous articles, and has good stability and repeatability.
Description
technical field [0001] The invention belongs to the technical field of hazardous chemical detection, in particular to a dual-mode hazardous chemical detection sensor. Background technique [0002] After experiencing large-scale expansion and high-speed development in various chemical industry parks in my country, a large number of production safety problems have emerged in recent years. Since chemical parks and chemical companies store a large amount of flammable, explosive, toxic and harmful chemicals, once a production accident occurs, such as fire, dangerous gas leakage, etc., it will easily trigger a catastrophic chain effect of domino accidents, resulting in regional mass casualty accident. Therefore, the development of rapid and accurate on-site identification and detection technology for hazardous chemicals has become an urgent problem related to public safety, environmental pollution, chemical production, military application, forensic investigation, minefield analy...
Claims
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Login to View More IPC IPC(8): G01N21/64
CPCG01N21/643
Inventor 关荣锋朱毅杨秀丽邵荣丁成陈健
Owner YANCHENG INST OF TECH