CN102879376A - Sensor for detecting nitro-aromatics explosives - Google Patents
Sensor for detecting nitro-aromatics explosives Download PDFInfo
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- CN102879376A CN102879376A CN2012104019811A CN201210401981A CN102879376A CN 102879376 A CN102879376 A CN 102879376A CN 2012104019811 A CN2012104019811 A CN 2012104019811A CN 201210401981 A CN201210401981 A CN 201210401981A CN 102879376 A CN102879376 A CN 102879376A
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Abstract
The invention relates to a sensor for detecting nitro-aromatics explosives. The sensor comprises a wheel-shaped optical fiber sensor head which is coupled with an end face of a blue-ray laser, an air chamber, a high pass optical filter and an optical power meter, wherein the wheel-shaped optical fiber sensor head is arranged in the air chamber, a gas inlet and a gas outlet are formed in the air chamber; the wheel-shaped optical fiber sensor head comprises the blue-ray laser, a circulator and a wheel-shaped optical fiber from outside to inside; the inner part of the wheel-shaped optical fiber is coated by a [poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene)] (MEH-PPV) sensitive material through a pulling method, the light which is sent out by the blue-ray laser passes by the circulator and then is coupled in the wheel-shaped optical fiber through adopting an end face coupling method, and the light in the wheel-shaped optical fiber enters the high pass optical filter which has a cutoff wavelength of 510 nanometers and then enters the optical power meter. The explosive concentration is detected through detecting the strength of a fluorescent indicator, and compared with the similar products, the lower detection limit and sensitivity of the sensor can be improved by 10-20 times. Additionally, the sensor has the advantages of high detection speed, stability in working performance, small required sampling amount and the like.
Description
Technical field
The present invention relates to a kind of sensor, particularly a kind of sensor for detection of nitro arene explosive substance with the wheel shape optical fiber sensor head.
Background technology
Growth along with the international terrorism force, the extremist has made a series of pernicious explosive incidents all over the world, these events have consisted of great threat to the mankind's living safety, and therefore how detecting the explosive of concealing on luggage, mail, vehicle, aircraft and suspect's health has become the problem that various countries law enforcement agency faces jointly.
The detection technique of explosive can be divided into body Detection Techniques and microscratch amount detection technique.
The body of explosive is visited detection technique and is had the shortcomings such as expensive, that sensitivity is low, equipment volume is large, thereby has limitation in application facet.
The microscratch amount detection technique of explosive mainly is the steam that explosive is volatilized and the technology that the residual microscratch amount explosive in thing (comprising human body) surface that adheres to explosive vessel surface and any contacted explosive is detected.
At present, can be used for to the technology that microscratch amount explosive detects mainly be various spectroscopic techniques, based on the sensing technology of Fluorescence Quenching Principle and biosensor technique etc.The wave spectrum detection method mainly contains vapor-phase chromatography (GC), mass spectroscopy (MS) and ionic migration method (IMS) etc.At present, these microscratch amount detection techniques all also are in continuous exploration and the development.With regard to DEVELOPMENT PROSPECT, the fluorescent quenching explosives sensor has that detection speed is fast, detection sensitivity is high, good stability, the sensor cost is low, volume is little, the advantage such as easy and simple to handle, is considered to one of best technology of present explosive trace detection, detection aspect.
The core diameter of wheel shape optical fiber is 1.6 microns, and it is 8 microns airport that 3 apertures are arranged on every side, and external diameter is 125 microns.The advantage of this sensing head is that fluorescence indicator can directly be coated to around the airport, detected nitro arene explosive substance gas also can directly enter airport, because the effect of evanescent wave, fluorescence indicator sends fluorescence, fluorescence intensity reduces along with the increase of explosive concentration, by surveying the concentration of the fluorescence intensity measurement explosive in the fibre core that is coupled back.
At present based on the main difficult technical of the microscratch amount explosives sensor of Fluorescence Quenching Principle be fluorescence indicator fluorescence intensity a little less than, survey the difficulty of fluorescence signal thereby increased, and make the sensitivity of system and detect lower limit and reduce.
Summary of the invention
The present invention be directed at present based on the microscratch amount explosives sensor of Fluorescence Quenching Principle because the problem that the fluorescence intensity of fluorescence indicator causes detection sensitivity to reduce a little less than, a kind of sensor for detection of nitro arene explosive substance has been proposed, the intensity of fluorescence indicator can reduce along with the increase of explosive concentration, by the fluorescence intensity of surveying fluorescence indicator the concentration of explosive being carried out detection sensitivity reduces, but wheel shape optical fiber can improve the intensity that enters into the airport evanescent wave, and then the luminous intensity of raising fluorescence indicator, reach the sensitivity of raising system and the purpose of detection lower limit, can well solve the problem that present sensors with auxiliary electrode were exists.
Technical scheme of the present invention is: a kind of sensor for detection of nitro arene explosive substance, the wheel shape Fibre Optical Sensor head that comprises the coupling of blue laser end face, air chamber, high-pass filter, light power meter, the wheel shape optical fiber sensor head places air chamber, wherein wheel shape Fibre Optical Sensor head comprises blue laser from outside to inside, circulator, the inner wheel shape optical fiber that applies the MEH-PPV sensitive material by czochralski method, the light that blue laser sends is behind circulator, adopt the coupling of end face coupling process to advance in the wheel shape optical fiber, the light in the wheel shape optical fiber enters after wavelength is the high-pass filter of 510nm and then light power meter by circulator again.
Described high-pass filter is positioned on the optical bench, and the probe of light power meter and high-pass filter are on a horizontal line, and the probe direct detection of light power meter is through the light intensity after the high-pass filter.
Gas feed and outlet are arranged on the described air chamber, be used for the explosive gas by variable concentrations.
Beneficial effect of the present invention is: the present invention is for detection of the sensor of nitro arene explosive substance, and also invention detection lower limit and sensitivity can improve 10-20 doubly compared with similar products.The advantages such as in addition, this sensor has that detection speed is fast, stable work in work, required sample size are little.
Description of drawings
Fig. 1 is that the present invention is for detection of the sensor construction synoptic diagram of nitro arene explosive substance;
Fig. 2 is that the present invention is for detection of wheel shape optical fiber schematic cross-section in the sensor of nitro arene explosive substance.
Embodiment
As shown in Figure 1 for detection of the sensor construction synoptic diagram of nitro arene explosive substance, the wheel shape Fibre Optical Sensor head, air chamber 4, high-pass filter 5, the light power meter 6 that comprise the coupling of blue laser end face, the wheel shape optical fiber sensor head places air chamber, gas feed and outlet are arranged on the air chamber 4, see arrow among the figure, wherein the wheel shape Fibre Optical Sensor head of blue laser end face coupling wheel shape optical fiber schematic cross-section as shown in Figure 2 comprises blue laser 1, circulator 2, the inner wheel shape optical fiber 3 that applies the MEH-PPV sensitive material by czochralski method from outside to inside.
The preparation of wheel shape optical fiber sensor head: at first sensitive material MEH-PPV is dissolved in the methenyl choloride, concentration is 1mg/ml.Then wheel shape optical fiber 3 one ends with 30 centimeter length place this sensitive material, place 5 minutes.Take out to be placed in the baking oven that temperature is 80 degree and placed 100 minutes, after the methenyl choloride volatilization, from baking oven, take out.
The light that blue laser 1 sends adopts the coupling of end face coupling process to advance in the wheel shape optical fiber 3 behind circulator 2.
The wheel shape optical fiber sensor head is placed air chamber 4, and the gas feed on the air chamber 4 and outlet are used for the explosive gas by variable concentrations;
Light in the optical fiber enters after wavelength is the high-pass filter 5 of 510nm and then light power meter 6 by circulator 2, by the intensity of surveying fluorescence indicator explosive concentration is surveyed, high-pass filter is positioned on the optical bench, the probe of light power meter and high-pass filter are on a horizontal line, and the probe direct detection of light power meter is through the light intensity after the high-pass filter 5.
Claims (3)
1. sensor for detection of nitro arene explosive substance, it is characterized in that, the wheel shape Fibre Optical Sensor head that comprises the coupling of blue laser end face, air chamber, high-pass filter, light power meter, the wheel shape optical fiber sensor head places air chamber, wherein wheel shape Fibre Optical Sensor head comprises blue laser from outside to inside, circulator, the inner wheel shape optical fiber that applies the MEH-PPV sensitive material by czochralski method, the light that blue laser sends is behind circulator, adopt the coupling of end face coupling process to advance in the wheel shape optical fiber, the light in the wheel shape optical fiber enters after wavelength is the high-pass filter of 510nm and then light power meter by circulator again.
2. described sensor for detection of nitro arene explosive substance according to claim 1, it is characterized in that, described high-pass filter is positioned on the optical bench, and the probe of light power meter and high-pass filter are on a horizontal line, and the probe direct detection of light power meter is through the light intensity after the high-pass filter.
3. described sensor for detection of nitro arene explosive substance according to claim 1 is characterized in that gas feed and outlet are arranged on the described air chamber, is used for the explosive gas by variable concentrations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104019811A CN102879376A (en) | 2012-10-22 | 2012-10-22 | Sensor for detecting nitro-aromatics explosives |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104019811A CN102879376A (en) | 2012-10-22 | 2012-10-22 | Sensor for detecting nitro-aromatics explosives |
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| CN102879376A true CN102879376A (en) | 2013-01-16 |
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| CN2012104019811A Pending CN102879376A (en) | 2012-10-22 | 2012-10-22 | Sensor for detecting nitro-aromatics explosives |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454257A (en) * | 2013-09-04 | 2013-12-18 | 上海电力学院 | Method for judging coupling of laser into wheel-shaped optical fiber core |
| CN103616362A (en) * | 2013-12-06 | 2014-03-05 | 上海电力学院 | Sensing head of fluorescent fiber sensor and preparation method of sensing head |
| CN103674909A (en) * | 2013-09-27 | 2014-03-26 | 上海电力学院 | Sensor for detecting gas nitro-aromatics explosives |
| CN103868896A (en) * | 2014-01-26 | 2014-06-18 | 中国科学院长春光学精密机械与物理研究所 | Chemical optical fiber sensor self-reference quantization detection method |
| CN107037019A (en) * | 2017-04-01 | 2017-08-11 | 陕西师范大学 | Laminated construction fluorescent optical sensor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101419217A (en) * | 2008-11-25 | 2009-04-29 | 上海电力学院 | Sensing head for detecting nitro arene explosive substance and method for making same |
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2012
- 2012-10-22 CN CN2012104019811A patent/CN102879376A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101419217A (en) * | 2008-11-25 | 2009-04-29 | 上海电力学院 | Sensing head for detecting nitro arene explosive substance and method for making same |
Non-Patent Citations (3)
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| YINIAN ZHU等: "Design of solid-core microstructured optical fiber with steering-wheel air cladding for optimal evanescent-field sensing", 《OPTICS EXPRESS》, vol. 14, no. 8, 17 April 2006 (2006-04-17), pages 3546 * |
| 乔学光等: "CH4监测的反射式光纤传感方法研究", 《光电子•激光》, vol. 20, no. 8, 31 August 2009 (2009-08-31), pages 1018 * |
| 初凤红等: "基于荧光猝灭原理的硝基芳烃类爆炸物检测实验研究", 《中国激光》, vol. 38, no. 9, 30 September 2011 (2011-09-30) * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454257A (en) * | 2013-09-04 | 2013-12-18 | 上海电力学院 | Method for judging coupling of laser into wheel-shaped optical fiber core |
| CN103454257B (en) * | 2013-09-04 | 2015-08-05 | 上海电力学院 | For judging whether laser is coupled into the method for wheel shape fiber core |
| CN103674909A (en) * | 2013-09-27 | 2014-03-26 | 上海电力学院 | Sensor for detecting gas nitro-aromatics explosives |
| CN103616362A (en) * | 2013-12-06 | 2014-03-05 | 上海电力学院 | Sensing head of fluorescent fiber sensor and preparation method of sensing head |
| CN103868896A (en) * | 2014-01-26 | 2014-06-18 | 中国科学院长春光学精密机械与物理研究所 | Chemical optical fiber sensor self-reference quantization detection method |
| CN107037019A (en) * | 2017-04-01 | 2017-08-11 | 陕西师范大学 | Laminated construction fluorescent optical sensor |
| CN107037019B (en) * | 2017-04-01 | 2024-01-23 | 陕西师范大学 | Lamination structure fluorescence light sensor |
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Application publication date: 20130116 |