CN103675921A - Detector for detecting liquid dangerous goods in near field or far field detection mode - Google Patents
Detector for detecting liquid dangerous goods in near field or far field detection mode Download PDFInfo
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- CN103675921A CN103675921A CN201310667123.6A CN201310667123A CN103675921A CN 103675921 A CN103675921 A CN 103675921A CN 201310667123 A CN201310667123 A CN 201310667123A CN 103675921 A CN103675921 A CN 103675921A
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Abstract
The invention relates to a safety detection instrument, in particular to a detector for detecting liquid dangerous goods in a near field or far field complementary detection mode. The method solves the problems that in the prior art, when liquid to be detected is detected, only the near field distance detection mode is selected, to-be-detected signals of part of the liquid are difficult to distinguish, misinformation occurs easily, expansion of a sample set of the detector is hindered, and the detection accurate rate is affected. According to the technical scheme for solving the technical problems, a locating baffle sliding along a sliding groove is arranged on a machine shell and forms a top outlet of a container of the liquid dangerous goods to be detected, a combined measurement antenna is arranged on a bottom board inside a detection cabin formed by the machine shell, and a bottom near field clamping groove and a bottom far field clamping groove of the container of the liquid dangerous goods to be detected are formed opposite to the combined measurement antenna. The detector is used for detecting the liquid dangerous goods.
Description
Technical field: the present invention relates to a kind of safety detecting instrument, is a kind of detector that adopts near field or far field complementary detection dangerous liquid material specifically.
Background technology: dangerous liquid material detector is dangerous liquid material to be detected to the instrument of identification, in the safety check systems such as civil aviaton, railway, urban track traffic, all needs the liquid article that passenger is carried to detect under the state not breaking a seal.In existing multiple inspection method and equipment, microwave detection method is one of main method.What in microwave detection method, Detection accuracy was higher is ultra-wideband pulse microwave reflection, basic structure and the method for the method instrument are: fluid to be measured dangerous goods container is positioned on the base in detector, multiple measurement antenna is arranged at the distance of near field on base opposite, according to the amplitude difference that receives signal, carrys out the liquid that resolved detection is different.Existing problem is: when detecting testing liquid, only select the distance of near field to detect, wrong report, easily appears in the measured signal indistinguishable of partially liq, has hindered the expansion of detector sample set, and has affected Detection accuracy.
Summary of the invention: object of the present invention is exactly to propose a kind of detector that adopts near field or far field complementary detection dangerous liquid material, to solve background technology, exist: when detecting testing liquid, only select the distance of near field to detect, the measured signal indistinguishable of partially liq, easily there is wrong report, hinder the expansion of detector sample set, and affected the problem of Detection accuracy.Solving this technical problem adopted technical scheme is: a kind of detector that adopts near field or far field detection dangerous liquid material, it is characterized in that arranging above casing the top exit of the positioning baffle formation fluid to be measured dangerous goods container sliding along sliding tray, in the internal backplane of the formed detection of casing cabin, multiple measurement antenna is set, multiple measurement antenna opposite arranges near field, bottom draw-in groove and the far field draw-in groove of placing fluid to be measured dangerous goods container.Wherein, above casing, arrange and drive near field or the far field that baffle plate slides along sliding tray to select button.Casing side arranges the touch LCD screen that shows testing result.It is 1-3cm that near field draw-in groove makes the bee-line between fluid to be measured dangerous goods container and multiple measurement antenna; It is 8-12cm that far field draw-in groove makes the bee-line between fluid to be measured dangerous goods container and multiple measurement antenna.Near field draw-in groove and far field draw-in groove form upper and lower overlaying structure.Detect cabin internal backplane form with near field draw-in groove and far field draw-in groove in to inclination, the fluid to be measured dangerous goods container bottom that makes to be positioned on base plate is adjacent to draw-in groove.This detector is by microwave generation module, signal acquisition module and signal processing module form, constant-temperature crystal oscillator produces the microwave signal of assigned frequency by the frequency synthesizer under steering logic, and by power divider Fen Yi road, deliver to emitting antenna and carry out electromagnetic transmitting, export by being modulated to intermediate frequency (50MHz) on another road, receiving antenna in synchronous signal acquisition module, also by being modulated to intermediate frequency (50MHz), this two paths of signals is received FPGA signal-processing board and is compared, and extract the amplitude of signal and phase place for differentiating different types of liquid, net result is shown by touch LCD screen display.
The beneficial effect that the present invention and background technology comparison have is: according to technique scheme, during measurement, the container of splendid attire testing liquid is put into and detected cabin, by selecting button to drive positioning baffle to slide along groove, positioning baffle is fixed near field position by the container top of splendid attire testing liquid, the container bottom of splendid attire testing liquid is fixed in the draw-in groove of near field simultaneously, and liquid crystal display shows primary detection result: dangerous or safe or undetermined.If primary detection result is undetermined, container from splendid attire testing liquid is taken out from detect cabin, by select button, drive positioning baffle to slide along groove, positioning baffle is fixed on far-field position by the container top of splendid attire testing liquid, the container bottom of splendid attire testing liquid will be fixed in the draw-in groove of far field simultaneously, again the container of splendid attire testing liquid is put into and detected cabin, again show testing result.Liquid due to 90% can be differentiated in the distance of near field, therefore this detection mode does not affect detection efficiency, can significantly reduce instrument wrong report, and sample can be extended to oils, alcohols, alkanes, ester class flammable and combustible liquids and other are as the dangerous liquid of strong acid, highly basic class.This detector utilizes the near field of antenna different with the radiation law in far field, choose two kinds of containers to the bee-line of antenna, two distances belong to respectively near field and the far field of antenna, the distance that design belongs near field is main measuring distance (antenna near-field is more responsive to liquid dielectric property), at this apart from most situations (being greater than 95%) being differentiated; Situation about cannot differentiate for main distance, is placed on testing liquid under another auxiliary distance and differentiates.
Accompanying drawing explanation: Fig. 1 is invention external structure schematic diagram.Fig. 2 is the inner structure schematic diagram of near-field detection state of the present invention.Fig. 3 is the inner structure schematic diagram of far field detection state of the present invention.Fig. 4 is ultimate principle block diagram of the present invention.
Embodiment:
Embodiment 1: with reference to figure 1, Fig. 2, Fig. 3, Fig. 4, a kind of detector that adopts near field or far field detection dangerous liquid material, it is characterized in that casing 4 arranges the top exit that the positioning baffle 1 sliding along sliding tray 5 forms fluid to be measured dangerous goods container above, in 6 internal backplane of the formed detection of casing 4 cabin, multiple measurement antenna 8 is set, multiple measurement antenna 8 opposites arrange near field, bottom draw-in groove 7 and the far field draw-in groove 9 of placing fluid to be measured dangerous goods container; Casing 4 arranges above and drives near field or the far field that baffle plate 1 slides along sliding tray 5 to select button 2; Casing 4 sides arrange the touch LCD screen 3 that shows testing result; It is 1-3cm that near field draw-in groove 7 makes the bee-line between fluid to be measured dangerous goods container and multiple measurement antenna 8; It is 8-12cm that far field draw-in groove 9 makes the bee-line between fluid to be measured dangerous goods container and multiple measurement antenna 8;
Near field draw-in groove 7 and far field draw-in groove 9 form upper and lower overlaying structure, detect cabin 6 internal backplane form with near field draw-in groove 7 and far field draw-in groove 9 interior to inclination, the fluid to be measured dangerous goods container bottom that makes to be positioned on base plate is adjacent to draw-in groove, this detector is by microwave generation module, signal acquisition module and signal processing module form, constant-temperature crystal oscillator produces the microwave signal of assigned frequency by the frequency synthesizer under steering logic, and by power divider Fen Yi road, deliver to emitting antenna and carry out electromagnetic transmitting, export by being modulated to intermediate frequency (50MHz) on another road, receiving antenna in synchronous signal acquisition module, also by being modulated to intermediate frequency (50MHz), this two paths of signals is received FPGA signal-processing board and is compared, and extract the amplitude of signal and phase place for differentiating different types of liquid, net result is shown by touch LCD screen display.
Claims (10)
1. a detector that adopts near field or far field detection dangerous liquid material, it is characterized in that casing (4) arranges the top exit that the positioning baffle (1) sliding along sliding tray (5) forms fluid to be measured dangerous goods container above, in the internal backplane of the formed detection of casing (4) cabin (6), multiple measurement antenna (8) is set, multiple measurement antenna (8) opposite arranges near field, bottom draw-in groove (7) and the far field draw-in groove (9) of placing fluid to be measured dangerous goods container.
2. adopt according to claim 1 the detector of near field or far field detection dangerous liquid material, it is characterized in that casing (4) arranges near field or the far field selection button (2) that drives baffle plate (1) to slide along sliding tray (5) above.
3. according to the detector that adopts near field or far field detection dangerous liquid material described in claim 1 or 2, it is characterized in that casing (4) side arranges the touch LCD screen (3) that shows testing result.
4. according to the detector that adopts near field or far field detection dangerous liquid material described in claim 1 or 2, it is characterized in that it is 1-3cm that near field draw-in groove (7) makes the bee-line between fluid to be measured dangerous goods container and multiple measurement antenna (8); It is 8-12cm that far field draw-in groove (9) makes the bee-line between fluid to be measured dangerous goods container and multiple measurement antenna (8).
5. adopt according to claim 3 the detector of near field or far field detection dangerous liquid material, it is characterized in that it is 1-3cm that near field draw-in groove (7) makes the bee-line between fluid to be measured dangerous goods container and multiple measurement antenna (8); It is 8-12cm that far field draw-in groove (9) makes the bee-line between fluid to be measured dangerous goods container and multiple measurement antenna (8).
6. according to the detector that adopts near field or far field detection dangerous liquid material described in claim 1 or 2, it is characterized in that near field draw-in groove (7) and far field draw-in groove (9) form upper and lower overlaying structure.
7. adopt according to claim 3 the detector of near field or far field detection dangerous liquid material, it is characterized in that near field draw-in groove (7) and far field draw-in groove (9) form upper and lower overlaying structure.
8. adopt according to claim 4 the detector of near field or far field detection dangerous liquid material, it is characterized in that near field draw-in groove (7) and far field draw-in groove (9) form upper and lower overlaying structure.
9. according to the detector that adopts near field or far field detection dangerous liquid material described in claim 1 or 2, it is characterized in that detecting the introversive inclination of cabin (6) internal backplane formation and near field draw-in groove (7) and far field draw-in groove (9), the fluid to be measured dangerous goods container bottom that makes to be positioned on base plate is adjacent to draw-in groove.
10. adopt according to claim 3 the detector of near field or far field detection dangerous liquid material, it is characterized in that detecting the introversive inclination of cabin (6) internal backplane formation and near field draw-in groove (7) and far field draw-in groove (9), the fluid to be measured dangerous goods container bottom that makes to be positioned on base plate is adjacent to draw-in groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310667123.6A CN103675921A (en) | 2013-12-11 | 2013-12-11 | Detector for detecting liquid dangerous goods in near field or far field detection mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310667123.6A CN103675921A (en) | 2013-12-11 | 2013-12-11 | Detector for detecting liquid dangerous goods in near field or far field detection mode |
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| CN103675921A true CN103675921A (en) | 2014-03-26 |
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| CN201310667123.6A Pending CN103675921A (en) | 2013-12-11 | 2013-12-11 | Detector for detecting liquid dangerous goods in near field or far field detection mode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104834019A (en) * | 2015-05-21 | 2015-08-12 | 安徽启路达光电科技有限公司 | Desk-type liquid safety check instrument |
| CN104833697A (en) * | 2015-05-21 | 2015-08-12 | 安徽启路达光电科技有限公司 | Desktop dangerous liquid security checker |
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| CN201974408U (en) * | 2011-04-02 | 2011-09-14 | 北京中泰通达科技发展有限公司 | Dangerous liquid inspection tester |
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| CN202372459U (en) * | 2011-12-26 | 2012-08-08 | 成都昂迅电子有限公司 | Multiple-transmit multiple-receive antenna device used for dangerous liquid detector |
| CN202794516U (en) * | 2012-08-10 | 2013-03-13 | 南京理工大学 | Short millimeter wave AC radiation imaging device |
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2013
- 2013-12-11 CN CN201310667123.6A patent/CN103675921A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040174289A1 (en) * | 2003-03-07 | 2004-09-09 | Singh Donald R. | Imaging methods and systems for concealed weapon detection |
| US6965340B1 (en) * | 2004-11-24 | 2005-11-15 | Agilent Technologies, Inc. | System and method for security inspection using microwave imaging |
| CN201974408U (en) * | 2011-04-02 | 2011-09-14 | 北京中泰通达科技发展有限公司 | Dangerous liquid inspection tester |
| CN102393536A (en) * | 2011-10-30 | 2012-03-28 | 北京无线电计量测试研究所 | Scanning method for human body security check system utilizing frequency division and space division |
| CN202372459U (en) * | 2011-12-26 | 2012-08-08 | 成都昂迅电子有限公司 | Multiple-transmit multiple-receive antenna device used for dangerous liquid detector |
| CN202794516U (en) * | 2012-08-10 | 2013-03-13 | 南京理工大学 | Short millimeter wave AC radiation imaging device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104834019A (en) * | 2015-05-21 | 2015-08-12 | 安徽启路达光电科技有限公司 | Desk-type liquid safety check instrument |
| CN104833697A (en) * | 2015-05-21 | 2015-08-12 | 安徽启路达光电科技有限公司 | Desktop dangerous liquid security checker |
| CN104834019B (en) * | 2015-05-21 | 2018-01-02 | 安徽启路达光电科技有限公司 | A kind of desk type liquid safety check instrument |
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Application publication date: 20140326 |