CN205121768U - Prison prevent escaping from prison monitoring alarm system - Google Patents
Prison prevent escaping from prison monitoring alarm system Download PDFInfo
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- CN205121768U CN205121768U CN201520614452.9U CN201520614452U CN205121768U CN 205121768 U CN205121768 U CN 205121768U CN 201520614452 U CN201520614452 U CN 201520614452U CN 205121768 U CN205121768 U CN 205121768U
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- prison
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Abstract
The utility model relates to a prison prevent escaping from prison monitoring alarm system, include: the distributed optical fiber sensor, test unit, data processing unit and the alarm unit that connect gradually, the distributed optical fiber sensor is buried underground in the road surface bottom of the prison enclosure foot of a wall, connects through transmission fiber and tests the unit, is electric connection between test unit, data processing unit and the alarm unit respectively, test unit, signal output ware connection alarm unit are connected including the signal receiver, light electric signal transducer, logic circuit and the signal output ware that connect gradually, signal receiver to the data processing unit, the distributed optical fiber sensor includes fiber core, fiber core coiled spiral pipe structure, and the radius of spiral pipe structure slightly is greater than or slightly is less than fiber core's critical bend radius. The utility model discloses can this section road surface of real -time supervision receive a heavy condition to whether someone frequently is close to the condition that the enclosure is marginal or other preparations are escaped from prison in the real -time supervision prison, the fiber core of distributed optical fiber sensor adopts the spiral pipe structure in addition, and the fiber core of length can make the shorter sensor of detection range, low cost equally.
Description
Technical field
The utility model relates to detection technique field, particularly relates to the anti-monitor and alarm system of escaping from prison in a kind of prison.
Background technology
At present, in prison, major part adopts camera to carry out recording monitor, and being identified video frames by personnel and supervise, this kind of method wastes time and energy; In addition, the application aspect of optical fiber, prior art adopts optical fiber micro-bending structure mostly, micro-curved by the formation of corresponding mould in pairs, processing and manufacturing difficulty, fibre optic installations is between micro-bending mould, and mould upward pressure changes, the spacing change of micro-bending mould, cause and changed by the intensity loss of optical fiber, realize pressure survey by measured light intensity or light loss, and optical fiber is almost straight-run in mould, judge that stress point utilizes the light velocity in optical fiber to judge, judge that the resolution of stress point is low.
Summary of the invention
The utility model provides the anti-monitor and alarm system of escaping from prison in a kind of prison, to solve the problems of the technologies described above.
In order to achieve the above object, the technical solution of the utility model is achieved in that the anti-monitor and alarm system of escaping from prison in a kind of prison, comprising: the distributed fiberoptic sensor connected successively, test cell, data processing unit and alarm unit; Distributed fiberoptic sensor is embedded in bottom the road surface of prison enclosure wall the foot of a wall; Distributed fiberoptic sensor by Transmission Fibers connecting test unit, test cell, is respectively electric connection between data processing unit and alarm unit; Distributed fiberoptic sensor comprises fiber cores, fiber cores coiling tubular construction.
In above-mentioned technical characteristic, test cell comprises optical time domain reflectometer.
In above-mentioned technical characteristic, data processing unit comprises the signal receiver, light/electric signal transducer, logical circuit and the signal output device that connect successively; Signal receiver connecting test unit, signal output device connects alarm unit.
In above-mentioned technical characteristic, the radius of spiral tube structure slightly larger than, equal or be slightly less than the critical bend radius of fiber cores.
In above-mentioned technical characteristic, fiber cores is wrapped with elastoplast covering.
In above-mentioned technical characteristic, outside spiral tube structure, be arranged with Silicone Case.
Compared with prior art, the utility model has the advantage of: distributed fiberoptic sensor is laid in bottom the road surface of prison the foot of a wall, after distributed fiberoptic sensor is subject to External Force Acting, spiral tube structure can deform and directly cause fiber cores bending loss, the optical time domain reflectometer of test cell is squeezed into a series of pulse and is entered fiber cores to check backscattering level, the light signal strength reflected can be measured, and the light signal measured is the function of time, therefore this function can be converted into the length of fiber cores, the signal of the stressed front and back of comparative analysis just can accurately measure the size of external force suffered by distributed fiberoptic sensor optional position, can the trend of escaping from prison by heavy situation and prison inmates of this road section surface of Real-Time Monitoring, thus in Real-Time Monitoring prison, whether have the frequent situation preparing to escape from prison near edge wall or other of people, when distributed fiberoptic sensor stressed frequent time, the logical circuit of data processing unit can make a judgement, signal output device is made to send electric signal to alarm unit, thus alarm unit sends alerting signal, distributed fiberoptic sensor has the transmission of distributed nature and signal not by the advantage of such environmental effects in addition, the fiber cores of distributed fiberoptic sensor adopts spiral tube structure, and the optical fiber of same length, can make the sensor that detection range is shorter, under the prerequisite not improving electronic device resolution, improves the resolution of measuring distance, with low cost, by solenoid radial design near the critical radius of optical fiber, make sensor fiber all be in critical radius state, thus obtain very high light loss sensitivity, optical time domain reflectometer (OTDR) is squeezed into a series of pulse and is entered fiber cores to check backscattering level, the light signal strength reflected can be measured, and the light signal measured is the function of time, therefore this function can be converted into the length of optical fiber, the signal of the stressed front and back of comparative analysis just can accurately measure the size of external force suffered by distributed fiberoptic sensor optional position, the light signal that test cell transmits by data processing unit converts electric signal to, and by analytical calculation, send electric signal when needs send warning to alarm unit, alarm unit sends warning, warning staff.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the structural representation of the utility model embodiment distributed fiberoptic sensor.
The drawing reference numeral of embodiment:
1-distributed fiberoptic sensor; 11-fiber cores; 12-elastoplast covering;
13-Silicone Case; 2-test cell; 21-optical time domain reflectometer;
3-data processing unit; 31-signal receiver; 32-light/electric transcriber;
33-logical circuit; 34-signal output device; 4-alarm unit; 5-Transmission Fibers.
Embodiment
Carry out clear, complete description below with reference to the technical scheme of accompanying drawing to each embodiment of the utility model, obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiments.Based on the embodiment in the utility model, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope that the utility model is protected.
As shown in Figure 1, the utility model relates to the anti-monitor and alarm system of escaping from prison in a kind of prison, comprising: the distributed fiberoptic sensor 1 connected successively, test cell 2, data processing unit 3 and alarm unit 4; Distributed fiberoptic sensor 1 is embedded in bottom the road surface of prison enclosure wall the foot of a wall, can the trend of escaping from prison by heavy situation and prison inmates of this road section surface of Real-Time Monitoring, thus in Real-Time Monitoring prison, whether having the frequent situation preparing to escape from prison near edge wall or its of people, distributed fiberoptic sensor 1 has the transmission of distributed nature and signal not by the advantage of such environmental effects in addition; Distributed fiberoptic sensor 1 by Transmission Fibers 5 connecting test unit 2, test cell 2, between data processing unit 3 and alarm unit 4 for be electrically connected; Test cell 2 comprises optical time domain reflectometer 21; Data processing unit 3 comprises the signal receiver 31, light/electric signal transducer 32, logical circuit 33 and the signal output device 34 that connect successively, and signal receiver 31 connecting test unit 2, signal output device 34 connects warning horn.
As shown in Figure 2, distributed fiberoptic sensor 1 comprises fiber cores 11, fiber cores 11 coiling tubular construction, and the fiber cores 11 of same length, can make the shorter distributed fiberoptic sensor of detection range 1; Light pulse is sent into fiber cores 11 by optical time domain reflectometer 21 (OTDR), because the characteristic of fiber cores 11, bending, joint etc. cause reflection, the scattering of light, form rear orientation light, optical time domain reflectometer 21 utilizes rear orientation light luminous power and the time of Rayleigh scattering, obtains fiber cores 11 loss situation on the way.Optical time domain reflectometer 21 is measured and is sent light pulse and the power and the mistiming that receive rear orientation light, utilizes refractive index n values to convert this time-domain information to distance:
Wherein: S----distance, the c----light velocity, t----time of return, n----fiber cores 11 refractive index.
10nS is about as much as 1m, adopts the method improving temporal resolution, cost intensive, adopts the mode of spiral tube structure, effectively can improve the resolution of distance, with low cost, bending loss is another characteristic of fiber cores 11, when radius-of-curvature is larger, it is less that radius-of-curvature changes the bending loss change caused, and when radius-of-curvature is less, radius-of-curvature changes the bending loss caused and alters a great deal, the radius of spiral tube structure of the present utility model slightly larger than, equal or be slightly less than the critical bend radius of fiber cores 11, by spiral tube structure radial design near the critical radius of fiber cores 11, the fiber cores 11 of distributed fiberoptic sensor 1 is made all to be in critical radius state, thus obtain very high light loss sensitivity, under the prerequisite not improving electronic device resolution, improve the resolution of measuring distance, with low cost, fiber cores 11 is wrapped with elastoplast covering 12, and namely fiber cores 11 forms spiral tube structure, and elastoplast covering 12 also forms spiral tube structure, and wherein elastoplast covering 12 can adopt PU or PVC plastic, be arranged with Silicone Case 13 outside spiral tube structure, sustain damage to avoid distributed fiberoptic sensor 1.
Principle of work of the present utility model is: distributed fiberoptic sensor 1 is laid in bottom the road surface of prison the foot of a wall, after distributed fiberoptic sensor 1 is subject to External Force Acting, spiral tube structure directly causes fiber cores 11 bending loss by deforming, the optical time domain reflectometer 21 of test cell 2 is squeezed into a series of pulse and is entered fiber cores 11 to check backscattering level, the light signal strength reflected can be measured, and the light signal measured is the function of time, therefore this function can be converted into the length of fiber cores 11, the signal of the stressed front and back of comparative analysis just can accurately measure the size of external force suffered by distributed fiberoptic sensor 1 optional position, can the trend of escaping from prison by heavy situation and prison inmates of this road section surface of Real-Time Monitoring, thus in Real-Time Monitoring prison, whether have the frequent situation preparing to escape from prison near edge wall or other of people, when distributed fiberoptic sensor 1 stressed frequent time, the logical circuit 33 of data processing unit 3 can make a judgement, signal output device 34 is made to send electric signal to alarm unit 4, thus alarm unit 4 sends alerting signal.
The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, any those skilled in the art, do not departing within the scope of technical solutions of the utility model, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solutions of the utility model, according to any simple modification that technical spirit of the present utility model is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (4)
1. the anti-monitor and alarm system of escaping from prison in prison, is characterized in that, comprising: the distributed fiberoptic sensor connected successively, test cell, data processing unit and alarm unit;
Described distributed fiberoptic sensor is embedded in bottom the road surface of prison enclosure wall the foot of a wall;
Described distributed fiberoptic sensor connects described test cell by Transmission Fibers, described test cell, is respectively electric connection between described data processing unit and described alarm unit;
Described data processing unit comprises the signal receiver, light/electric signal transducer, logical circuit and the signal output device that connect successively, and described signal receiver connects described test cell, and described signal output device connects described alarm unit;
Described distributed fiberoptic sensor comprises fiber cores, described fiber cores coiling tubular construction, the radius of described spiral tube structure slightly larger than or be slightly less than the critical bend radius of described fiber cores.
2. the anti-monitor and alarm system of escaping from prison in prison as claimed in claim 1, is characterized in that: described test cell comprises optical time domain reflectometer.
3. the anti-monitor and alarm system of escaping from prison in prison as claimed in claim 1, is characterized in that: described fiber cores is wrapped with elastoplast covering.
4. the anti-monitor and alarm system of escaping from prison in prison as claimed in claim 1, is characterized in that: be arranged with Silicone Case outside described spiral tube structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520614452.9U CN205121768U (en) | 2015-08-14 | 2015-08-14 | Prison prevent escaping from prison monitoring alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520614452.9U CN205121768U (en) | 2015-08-14 | 2015-08-14 | Prison prevent escaping from prison monitoring alarm system |
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| Publication Number | Publication Date |
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| CN205121768U true CN205121768U (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520614452.9U Expired - Fee Related CN205121768U (en) | 2015-08-14 | 2015-08-14 | Prison prevent escaping from prison monitoring alarm system |
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| Country | Link |
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| CN (1) | CN205121768U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231059A (en) * | 2019-05-31 | 2019-09-13 | 南京大学 | The cable runs structure of survey disturbance based on POTDR system |
-
2015
- 2015-08-14 CN CN201520614452.9U patent/CN205121768U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231059A (en) * | 2019-05-31 | 2019-09-13 | 南京大学 | The cable runs structure of survey disturbance based on POTDR system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Meng Qingjun Inventor after: Zhu Xueyan Inventor before: Meng Qingjuan Inventor before: Zhu Xueyan |
|
| CB03 | Change of inventor or designer information | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Room 0913, 9th Floor of South Science and Technology Building, Chengde High-tech Zone, Hebei Province Patentee after: SHUJIN CHENGDE NETWORK TECHNOLOGY CO., LTD. Address before: Room 0913, 9th Floor of South Science and Technology Building, Chengde High-tech Zone, Hebei Province Patentee before: SHUJINZI CHENGDE NETWORK TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20200814 |
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| CF01 | Termination of patent right due to non-payment of annual fee |