CN101498705A - Nitryl suspicious explosive intelligent detector based on chemical sensor array technology - Google Patents
Nitryl suspicious explosive intelligent detector based on chemical sensor array technology Download PDFInfo
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- CN101498705A CN101498705A CNA2009100678771A CN200910067877A CN101498705A CN 101498705 A CN101498705 A CN 101498705A CN A2009100678771 A CNA2009100678771 A CN A2009100678771A CN 200910067877 A CN200910067877 A CN 200910067877A CN 101498705 A CN101498705 A CN 101498705A
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Abstract
The invention relates to a nitryl explosion suspicious item intelligent detecting instrument based on a chemical sensor array technology. A micro acquisition air pump is sequentially connected with a fine filter, a coarse filter, a sensor array, a voice alarm prompting device and a display; the sensor array is also sequentially connected with an analysis element, a sensor converting circuit, an A/D converter and a computer; the A/D converter is also sequentially connected with an alarm display circuit and the display; the sensor array and the voice alarm prompting device are connected with the display. The nitryl explosion suspicious item intelligent detecting instrument can be used for initially detecting and identifying nitrocompound explosion suspicious substances on various actual occasions. The sensor technology can respond instantly with rapid responding speed, high sensitivity and simple operation. The nitryl explosion suspicious item intelligent detecting instrument has the advantages of rapid responding speed, high sensitivity, good selection and portability. By applying the sensor array technology to detect the nitrocompound, the invention can realize portable on-site detection and online detection of light concentration trace amount nitrocompound.
Description
Technical field
The invention belongs to the explosion detection instrument, particularly a kind of nitryl suspicious explosive intelligent detector based on chemical sensor array technology.
Background technology
Explosive is one of main dangerous factor that may exist in the renewable waste material of entry and exit, common explosive such as TNT, nitroglycerine, hexogen, AN-TNT containing explosive etc. all contain nitro compound in the renewable waste material, these explosive substances have increased the danger of goods greatly, careless slightlyly just may cause accidents such as fire, blast.Very easily cause the loss of people's lives and properties, even cause the environmental hazards such as pollution of soil, atmosphere and water body environment.Thereby study highly sensitive method these compounds are detected, can effectively control and combat terrorist activities, safeguard the country and people's safety.A lot of methods can be used for the detection of nitro compound, analyse as liquid chromatography, look send out, X-ray diffraction and surface acoustic wave etc., yet these method detection limits are not high, complicated operating process and not portable.Survey nitro compound by metal detector with through the police dog of special training mostly at present, yet there is weak point in these two kinds of methods, metal detector is subjected to impurity easily and disturbs, and the training police dog need spend great amount of manpower and financial resources, and the detectivity of dog also is limited simultaneously.
Existing a lot, and price is comparatively cheap to the sensor of nitro compound explosive substance, can differentiate and survey one or more of the dangerous explosive of this class; The sensor limit can reach the ppb level, and has fast, highly sensitive, the simple operation and other advantages of response.
Summary of the invention
The object of the present invention is to provide a kind of nitryl suspicious explosive intelligent detector based on chemical sensor array technology, to be the chemical sensor array surveyed at various nitro compounds detect identification to the existence of the explosive substance that contains nitro compound for it.Can be used for of preliminary detection and the identification of various occasions to common explosive material.Micro-TNT, the DNT etc. that give out by various explosive materials, in the sensitive element absorption of sensor array, by signal analysis report device with " chemical signal " of nitro compound but change into other signals of quantitative test such as fluorescence; Analysis and then direct loic to these signals are judged, to conclude whether have explosive material and classification thereof.
The present invention realized by following technical proposals,
A kind of nitryl suspicious explosive intelligent detector based on chemical sensor array technology, it is characterized in that: connect smart coarse filter (2) by miniature collection air pump (1), smart coarse filter (2) connects the sensor array of being made up of sensitive element, sensing element (3), sensor array (3) connects analysis element (10), analysis element (10) connects sensor change-over circuit (9), sensor change-over circuit (9) connects A/D converter (7), and A/D converter (7) connects computing machine (8); A/D converter (7) connects alarm indication circuit (6); Alarm indication circuit (6) connects display (5); Sensor array (3) connects audio alert prompting device (4), and audio alert prompting device (4) connects display (5); Sensor array (3) connects display (5).
The invention has the advantages that:
This nitryl suspicious explosive intelligent detector based on chemical sensor array technology can be used for preliminary detection and the identification of various practical matter to nitro compound class suspicious explosive matter.
It promptly is suitable for the laboratory and detects research, can detect the existence of nitro compound again on the spot; And do not need through loaded down with trivial details detection steps such as sample collecting, mensuration concentration, sensor technology energy summary responses; Response speed is fast, and highly sensitive, simple to operate.
1. response speed is fast.Vapor-phase chromatography detects nitro compound and at first passes through sample collecting, then measures concentration, and whole process approximately needs 45min; Sensor array energy summary responses;
2. highly sensitive.The additive method such as the vapor-phase chromatography detection that are used for the explosive substance detection are limited to 10
-12-10
-11G, the detectability of sensor array have improved 1000 times, can detect minimumly to be limited to 10
-15G;
3. selectivity is good, and is easy to carry.The utilization sensor array technology detects nitro compound, can realize the online detection and the research of portable field inspection and low concentration trace nitro compound.
4. this detection technique has more vast development space, follow the variety classes chemical sensor constantly to study success and put goods on the market, sensor array can increase according to development the sensor technology of nitro compound with combination adapting to the detection of different explosive substances, parameters such as the accuracy of detection of explosive substance, detectability, response time are had improve in various degree;
Description of drawings
Fig. 1 is based on the nitryl suspicious explosive intelligent detector block diagram of chemical sensor array technology
Embodiment
A kind of nitryl suspicious explosive intelligent detector as shown in Figure 1 based on chemical sensor array technology, connect smart coarse filter (2) by miniature collection air pump (1), smart coarse filter (2) connects the sensor array of being made up of sensitive element, sensing element (3), sensor array (3) connects analysis element (10), analysis element (10) connects sensor change-over circuit (9), sensor change-over circuit (9) connects A/D converter (7), and A/D converter (7) connects computing machine (8); A/D converter (7) connects alarm indication circuit (6); Alarm indication circuit (6) connects display (5); Sensor array (3) connects audio alert prompting device (4), and audio alert prompting device (4) connects display (5); Sensor array (3) connects display (5).
Its course of work:
Miniature collection air pump 1 is delivered to the sensor array of being made up of some sensitive elements, sensing element and other auxiliary members 3 with the smart coarse filter 2 of tested gas.
(1), object collection; Sensitive element is the key component of sensor, has sensitive material on the sensitive element, with different sensitive materials, the effect between measured object and the sensitive material mostly is absorption according to different sensors, and the mechanism of absorption has two kinds: the one, adsorb between sensitive material and the nitro compound; The 2nd, nitro compound decomposed before this, then optionally adsorbed decomposition product;
(2), data transmission; Measured object causes that sensitive element changes, and the sensitive material of different chemical sensor produces the different parameters that change, and for example: fluorescence chemical sensor can produce fluorescence intensity and change; And electrochemical sensor can cause the variation of physical parameters such as resistance, peak point current, voltage; Sensing element is responsible for the parameter of these variations is transferred to analysis element 10;
(3), data conversion treatment; Because measurand mostly is the non electrical quantity with different characteristic, as fluorescence intensity, voltage, concentration etc., therefore sensor change-over circuit 9 need be set converts these non electrical quantities to electric signal; Through A/D converter 7 they being converted to then can be by the digital quantity of Computer Processing;
(4), information fusion is calculated; Merge counter 8 and mainly the recognition feature sign indicating number of the coherent detection result of sensor and existing common explosive substance is carried out logic determines and checking, analysis, additional, choice and status tracking and estimation;
(5), output result; Result calculated output is merged in information processing, and the output result defines certain explosive substance, control alarm indication circuit 6 provide the suspicious material result show 5 with audio alert prompting device 4.
Be not to be just to be suitable for detection technique in the laboratory with present detection technique as the gas chromatographic detection technology, it promptly is suitable for the laboratory and detects research, can detect the existence of nitro compound again on the spot; And do not need through loaded down with trivial details detection steps such as sample collecting, mensuration concentration, sensor technology energy summary responses; Response speed is fast, and highly sensitive, simple to operate.
At first, object collection; Has sensitive material on the sensitive element group of sensor array, has different sensitive materials according to different sensors, effect between measured object and the sensitive material mostly is absorption, measured object causes that sensitive element changes, the sensitive material of different chemical sensor produces the different parameters that change, and for example: fluorescence chemical sensor can produce fluorescence intensity and change; And electrochemical sensor can cause the variation of physical parameters such as resistance, peak point current, voltage; Sensing element is responsible for the parameter of these variations is transferred to the data-switching original paper;
Secondly, data conversion treatment; Because measurand mostly is the non electrical quantity with different characteristic, as fluorescence intensity, voltage, concentration etc., therefore the sensor change-over circuit need be set converts these non electrical quantities to electric signal; Through A/D converter they being converted to then can be by the digital quantity of Computer Processing;
Once more, information fusion is calculated; Merge to calculate mainly that coherent detection result to sensor verifies, logic analysis, replenish, choice and status tracking estimate;
Output result at last; Result calculated output is merged in information processing, and the output result defines certain explosive substance, and control alarm indication circuit provides the suspicious material result and shows and the audio alert prompting device.
Claims (1)
1, a kind of nitryl suspicious explosive intelligent detector based on chemical sensor array technology, it is characterized in that: connect smart coarse filter (2) by miniature collection air pump (1), smart coarse filter (2) connects the sensor array of being made up of sensitive element, sensing element (3), sensor array (3) connects analysis element (10), analysis element (10) connects sensor change-over circuit (9), sensor change-over circuit (9) connects A/D converter (7), and A/D converter (7) connects computing machine (8); A/D converter (7) connects alarm indication circuit (6); Alarm indication circuit (6) connects display (5); Sensor array (3) connects audio alert prompting device (4), and audio alert prompting device (4) connects display (5); Sensor array (3) connects display (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100678771A CN101498705A (en) | 2009-02-18 | 2009-02-18 | Nitryl suspicious explosive intelligent detector based on chemical sensor array technology |
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|---|---|---|---|
| CNA2009100678771A CN101498705A (en) | 2009-02-18 | 2009-02-18 | Nitryl suspicious explosive intelligent detector based on chemical sensor array technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104406958A (en) * | 2014-11-27 | 2015-03-11 | 江南大学 | In-situ reduction-based online aromatic nitro-compound determination method |
| CN106442320A (en) * | 2016-07-26 | 2017-02-22 | 北京艾泰克科技有限公司 | Portable explosive molecular detector |
| CN109073594A (en) * | 2016-06-14 | 2018-12-21 | 株式会社日立制作所 | Test drug, danger sounding device and the danger sounding method of danger sounding device |
-
2009
- 2009-02-18 CN CNA2009100678771A patent/CN101498705A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104406958A (en) * | 2014-11-27 | 2015-03-11 | 江南大学 | In-situ reduction-based online aromatic nitro-compound determination method |
| CN109073594A (en) * | 2016-06-14 | 2018-12-21 | 株式会社日立制作所 | Test drug, danger sounding device and the danger sounding method of danger sounding device |
| US10955401B2 (en) | 2016-06-14 | 2021-03-23 | Hitachi, Ltd. | Chemical for test used in hazardous substance sensing device, hazardous substance sensing device, and hazardous substance sensing method |
| CN106442320A (en) * | 2016-07-26 | 2017-02-22 | 北京艾泰克科技有限公司 | Portable explosive molecular detector |
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Open date: 20090805 |