CN103780883A - All-fiber perimeter security monitoring equipment capable of being in linkage with video - Google Patents
All-fiber perimeter security monitoring equipment capable of being in linkage with video Download PDFInfo
- Publication number
- CN103780883A CN103780883A CN201410055709.1A CN201410055709A CN103780883A CN 103780883 A CN103780883 A CN 103780883A CN 201410055709 A CN201410055709 A CN 201410055709A CN 103780883 A CN103780883 A CN 103780883A
- Authority
- CN
- China
- Prior art keywords
- signal
- video
- module
- sensing
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention relates to fiber distributed disturbance long-distance perimeter security monitoring equipment capable of being in linkage with video. The equipment is composed of a sensing module, a light source module, a detector module and a power module. The sensing module comprises a sensing light path unit and a polarization control unit. Intrusion detection and positioning are performed on a fortified area through the equipment, and intrusion information is recorded; when an intrusion behavior is monitored, an early warning program will be started, and the intrusion behavior is positioned, monitored and recorded in real time; meanwhile, a camera in a warning area is started to call out corresponding video signals so that a digital video recorder can automatically perform picture recording in real time, and the site conditions in the warning process are recorded and saved for subsequent replay analysis. Under the conditions that the monitoring area is large, and the monitoring distance is long, maintenance costs in use can be lowered, and high-grade security requirements of large special sensitive monitored objects can be met.
Description
Technical field
The present invention is applied to circumference security fields, relates to location and monitoring in real time to invasion position, specifically, relates to the optical fiber distributed perturbation length of video interlink apart from circumference safety monitoring equipment.
Background technology
Current traditional perimeter security system mainly contains access standard and goes out, physics fence is installed, personnel make an inspection tour, video monitoring, common video monitoring system needs its monitoring range of manual control, or sets the fixing route that cruises and cruise, this is in monitoring area and distance all very large in the situation that, being difficult to invasion position to carry out real-time monitoring,, there is monitoring leak in video recording.
At present both at home and abroad, also have some according to the distributed intrusion monitoring system of electromagnetic principle, such as intelligent electric subpulse fence system, tension type electronic fence, these three kinds intrusion warning systems of vibrations cable alarm system are all the new technologies of safety-security area, but cost is generally higher, to construct loaded down with trivial details, when large area is used, maintenance cost and difficulty are also very high.
These new distribution types are invaded monitoring system and are all had a total critical defect, and they all can not accurately locate the position of this intrusion behavior in monitoring, and Real-Time Monitoring and record are carried out in invasion position., give the alarm and only can block the behavior of by mistake swarming on a small quantity all very large in the situation that in monitoring area and distance, this obviously can not meet the high-level safety requirements of those large-scale special responsive monitoring targets.
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art, the object of the present invention is to provide a kind of to invasion position carry out real-time monitoring, the device of video recording, for achieving the above object, the technical scheme that the present invention takes is, can, with video interlink optical fiber distributed perturbation length apart from circumference safety monitoring equipment, comprise:
Disturbance early-warning and positioning system comprises sensing module, light source module, detector module, power module, and sensing module comprises sensing optical path unit and Polarization Control unit, and the sensing optic cable of sensing optical path unit is laid at the circumference in security protection district; Light source module provides light signal for whole system, and adjustable luminous power; Detector module receives the light signal of sensing module, and light signal is converted to the signal of telecommunication, is transferred to capture card; Power module is for providing operating voltage to other module in machine frame; Disturbance early-warning and positioning system is connected with disturbance Alarm Server, and disturbing signal is sent to disturbance Alarm Server by capture card;
First disturbance Alarm Server is analyzed disturbing signal and is obtained invading positional information, and the information exchange such as intrusion alarm, position is crossed to router be sent to each client, the corresponding video module sequence number in client software Analysis deterrmination invasion region, send video request signal by router to video server, video server receives after the video request signal of client, by with encoder, optical transmitter and receiver, camera obtains the video that camera is taken, and this video carries out real-time recording automatically for DVR.
Sensing optical path unit is specially: 2 monomode fibers form distributed vibrative sensor based on Mach-Zehnder optical fiber interferometer principle, forms two measuring fibers of fibre optic interferometer, for test optical fibre cables vibration signal on the way; The continuous light wave that light source module sends is divided into the two-beam ripple of light intensity 1:1 to be propagated two monomode fibers from one end of sensing optical path unit simultaneously, converges formation interference signal at the other end of sensing optical path unit, is transferred to detector module; Polarization Control unit adopts optical fiber squash type Polarization Controller to regulate polarisation of light state, adopts electromagnetism extruding to make 2 monomode fibers produce additional stress birfringence, produces the performance of similar crystal wave-plate, and its refractive index is changed with the change of stress.
Disturbance Alarm Server is analyzed disturbing signal and is obtained disturbing signal, and the signal data section that comprises signal characteristic in disturbing signal is carried out to filtering processing, calculates the signal energy in different frequency bands, and the energy spectrum of formation is as characteristic vector.With the characteristic vector Training RBF Neural Network of dissimilar interference, the signal of Real-time Collection draws intrusion model information by RBF neural net, and intrusion model information exchange is crossed to router is sent to each client.
Detector module comprises amplification and filter circuit, A/D change-over circuit, photodetector, the two ways of optical signals of forward-propagating and backpropagation in the optical cable of photodetector reception sensor-based system, light signal is converted to the signal of telecommunication by photodetector, through amplifying and filter circuit, A/D change-over circuit is transferred to capture card.
Technical characterstic of the present invention and effect:
This equipment carries out intrusion detection location to the region of setting up defences, and records invasion information.In the time having monitored intrusion behavior, to start early warning program, warning operator, and position, show invasion occurrence positions information and it is monitored and record in real time, the video camera that simultaneously starts alarm region recalls corresponding vision signal and automatically carries out real-time recording for DVR, and field condition when the lower warning of record is also preserved, for the analysis of resetting afterwards.
Accompanying drawing explanation
Fig. 1 can be with the optical fiber distributed perturbation length of video interlink apart from circumference security monitoring schematic diagram
In figure, the 1st, sensing optic cable, the 2nd, district sets up defences, the 3rd, disturbance early-warning and positioning system, the 4th, sensing module, the 5th, light source module, the 6th, detector module, the 7th, power module, the 8th, disturbance Alarm Server, the 9th, router, 10, the 11, the 12nd, client, the 13rd, video server, the 14th, encoder, the 15th, optical transmitter and receiver, the 16th, camera.
Embodiment
The problem existing for said method, by emerging distributed fiber-optic sensor technology, traditional video surveillance technology, advanced signal intelligent recognition technology merges mutually, forms novel intelligent circumference safety monitoring equipment, round-the-clock intrusion detection location is carried out in the region of setting up defences, and record invasion information.In the time having monitored intrusion behavior, will start early warning program, warning operator, and position, show invasion occurrence positions information and it is monitored and record in real time, so that operator on duty takes the corresponding precautionary measures in time.
In order to realize above-mentioned functions, this equipment adopts highly sensitive optic cable vibration transducer, the various oscillation phenomenons of supervisory function bit on optical cable in real time, according to the feature of the different event signal that gives the alarm, through signal processing, intrusion event is positioned and identified, and link with video monitoring system, be sent to video interlink system by locating information, The Cloud Terrace makes corresponding camera device forward intrusion event position to, control room just can obtain corresponding video information, and monitor staff just can process it.Optical cable can be arranged on various circumference facilities, and can utilize the communication function of optical cable itself, forms passive remote continuous distribution formula monitor network.
This equipment need be laid sensing optic cable at the circumference in security protection district, and sensing optic cable is connected with disturbance early-warning and positioning system, comprises sensing module, light source module, detector module.Sensing module comprises sensing optical path unit and Polarization Control unit.Optical fiber not only can signal transmission, can also serve as the transducer in safety precaution application, and this module adopts full Fibre Optical Sensor principle, utilizes shock wave, pressure wave, the sound wave of optical fiber any small sample perturbations signal formation to external world to carry out perception; By the modulation to light signal parameter (amplitude, frequency, phase place, polarization state), again through to after the processing of the detecting of light signal, transmission and photosignal, can accurately detect disturbing source state, calculate its position, and carry out harm judgement and the pattern recognition of disturbing source.Light source module provides light signal for whole equipment, and adjustable luminous power.The two ways of optical signals of forward-propagating and backpropagation in the optical cable of detector module reception sensor-based system, and light signal is converted to the signal of telecommunication, be transferred to capture card, realized dynamic range and the sensitivity of the light intensity of module optical monitoring signal based on gain matching mechanisms.Power module is for providing operating voltage to other module in machine frame, and input is in machine room-48V power supply.Power module can be powered separately, also can adopt the Hot Spare mode that 1+1 electric current is shared to power.In the time that Hot Spare is worked, wherein a fault does not affect another piece, thereby can guarantee that complete machine works reliably.In addition, power module has adopted the direct voltage modular converter of high-quality, has the features such as power supply is stable, short-circuit protection, overvoltage protection.Disturbance early-warning and positioning system is connected with disturbance Alarm Server, disturbing signal is sent to disturbance Alarm Server, once generation alert, first disturbance Alarm Server is analyzed and is obtained intrusion model information and invasion positional information, and by intrusion alarm and intrusion model, the information exchanges such as position are crossed router and are sent to each client, the corresponding video module sequence number in client software Analysis deterrmination invasion region, send video request signal by router to video server, video server receives after the video request signal of client, by with encoder, encoder according to the video monitoring module numbering in solicited message again with optical transmitter and receiver, camera connects, camera starts the video camera of alarm region invasion region is taken according to solicited message, and automatically carry out real-time recording for DVR, field condition when the lower warning of record, for the analysis of resetting afterwards, then by video information through optical transmitter and receiver, encoder, video server, router is sent to client, client receives the video image of invasion court by local area network (LAN), on control centre's software interface, can demonstrate rapidly the region of warning, place, time, and the invasion region situation that photographs of display video module, three links, thereby early warning is carried out in the threat behavior reaching invading the region circumference of setting up defences, the object of monitoring, auxiliary Security Personnel is in defence area, outer scene monitors, make administrative staff in Surveillance center's machine room, can observe the situation of the on-the-spot primary location of defence area circumference.
Embodiment 1 can be with the optical fiber distributed perturbation length of video interlink apart from circumference safety monitoring equipment
As shown in Figure 1 can be as follows apart from the composition of circumference safety monitoring equipment and effect with the optical fiber distributed perturbation length of video interlink:
This equipment need be laid sensing optic cable 2 at the circumference in security protection district 1, and sensing optic cable is connected with disturbance early-warning and positioning system 3, and 3 comprise sensing module 4, light source module 5, detector module 6, power module 7.Sensing module 4 comprises sensing optical path unit and Polarization Control unit.Sensing light path cell operation principle: lay an optical cable, utilize 2 monomode fibers in optical cable to form distributed vibrative sensor based on Mach-Zehnder optical fiber interferometer principle, two measuring fibers of their formation fibre optic interferometers, for test optical fibre cables vibration signal on the way.The continuous light wave that light source (LD) sends is divided into the two-beam ripple of light intensity 1:1 at two measuring fibers from one end of transducer
with
middle simultaneously propagate, converge formation interference signal at the Fibre Optical Sensor other end, be transferred to photodetector (
or
) in convert light signal to the signal of telecommunication, by amplification and filter circuit, signal is processed, in computer, signal is carried out to cross-correlation calculation through A/D converting transmission, obtain the time difference, because event occurrence positions is to the distance difference of distributed sensor two end detectors, and the propagation velocity of light wave in optical fiber is certain, the time difference of same event therefore detected according to two detectors, can calculate accurately the position that event occurs, thereby disturbance is positioned.Polarization Control unit adopts optical fiber squash type Polarization Controller to regulate polarisation of light state.Its principle is to utilize the photoelastic effect of monomode fiber, adopts electromagnetism extruding to make optical fiber produce additional stress birfringence, produces the performance of similar crystal wave-plate, and its refractive index is changed with the change of stress, is a kind of retardation control type Polarization Controller.Light source module 5 provides light signal for whole equipment, and adjustable luminous power.Detector module 6 comprises amplification and filter circuit, A/D change-over circuit, photodetector and capture card, the two ways of optical signals of forward-propagating and backpropagation in the optical cable of photodetector reception sensor-based system, and light signal is converted to the signal of telecommunication, be transferred to capture card, realized dynamic range and the sensitivity of the light intensity of module optical monitoring signal based on gain matching mechanisms.Power module 7 is for operating voltage being provided to other module in machine frame, and input is in machine room-48V power supply.Power module can be powered separately, also can adopt the Hot Spare mode that 1+1 electric current is shared to power.In the time that Hot Spare is worked, wherein a fault does not affect another piece, thereby can guarantee that complete machine works reliably.In addition, power module has adopted the direct voltage modular converter of high-quality, has the features such as power supply is stable, short-circuit protection, overvoltage protection.Disturbance early-warning and positioning system 3 is connected with disturbance Alarm Server 8, disturbing signal is sent to disturbance Alarm Server 8, once generation alert, disturbance Alarm Server 8 receives the disturbing signal that disturbance early-warning and positioning system 3 collects, first carry out disturbance end-point detection, then main control module adopts algorithm for pattern recognition, and the signal data section that comprises signal characteristic is carried out to filtering processing, calculate the signal energy in different frequency bands, the energy spectrum of formation is as characteristic vector.With the characteristic vector Training RBF Neural Network of dissimilar interference, the signal of Real-time Collection draws intrusion model information by RBF neural net, and by intrusion alarm and intrusion model, the information exchanges such as position are crossed router 9 and are sent to each client 10, 11, 12, the corresponding video module sequence number in client software Analysis deterrmination invasion region, send video request signal by router 9 to video server 13, video server 13 receives after the video request signal of client, by with encoder 14, encoder 14 according to the video monitoring module numbering in solicited message again with optical transmitter and receiver 15, camera 16 connects, camera starts the video camera of alarm region invasion region is taken according to solicited message, and automatically carry out real-time recording for DVR, field condition when the lower warning of record, for the analysis of resetting afterwards, then by video information through optical transmitter and receiver 15, encoder 14, video server 13, router 9 is sent to client, client receives the video image of invasion court by local area network (LAN), on control centre's software interface, can demonstrate rapidly the region of warning, place, time, and the invasion region situation that photographs of display video module, three links, thereby early warning is carried out in the threat behavior reaching invading the region circumference of setting up defences, the object of monitoring.
Claims (4)
- Can with a full optical fiber perimeter safety monitoring equipment for video interlink, it is characterized in that, comprising:Disturbance early-warning and positioning system comprises sensing module, light source module, detector module, light source module, and sensing module comprises sensing optical path unit and Polarization Control unit, and the sensing optic cable of sensing optical path unit is laid at the circumference in security protection district; Light source module provides light signal for whole equipment, and adjustable luminous power; Detector module receives the light signal of sensing module, and light signal is converted to the signal of telecommunication, is transferred to capture card; Power module is for providing operating voltage to other module in machine frame; Disturbance early-warning and positioning system is connected with disturbance Alarm Server, and disturbing signal is sent to disturbance Alarm Server by capture card;First disturbance Alarm Server is analyzed disturbing signal and is obtained invading positional information, and the information exchange such as intrusion alarm, position is crossed to router be sent to each client, the corresponding video module sequence number in client software Analysis deterrmination invasion region, send video request signal by router to video server, video server receives after the video request signal of client, by with encoder, optical transmitter and receiver, camera obtains the video that camera is taken, and this video carries out real-time recording automatically for DVR.
- 2. as claimed in claim 1 can be with the optical fiber distributed perturbation length of video interlink apart from circumference safety monitoring equipment, it is characterized in that, sensing optical path unit is specially: 2 monomode fibers form distributed vibrative sensor based on Mach-Zehnder optical fiber interferometer principle, form two measuring fibers of fibre optic interferometer, for test optical fibre cables vibration signal on the way; The continuous light wave that light source module sends is divided into the two-beam ripple of light intensity 1:1 to be propagated two monomode fibers from one end of sensing optical path unit simultaneously, converges formation interference signal at the other end of sensing optical path unit, is transferred to detector module; Polarization Control unit adopts optical fiber squash type Polarization Controller to regulate polarisation of light state, adopts electromagnetism extruding to make 2 monomode fibers produce additional stress birfringence, produces the performance of similar crystal wave-plate, and its refractive index is changed with the change of stress.
- 3. as claimed in claim 1 can be with the optical fiber distributed perturbation length of video interlink apart from circumference safety monitoring equipment, it is characterized in that, disturbance Alarm Server is analyzed disturbing signal and is obtained disturbing signal, the signal data section that comprises signal characteristic in disturbing signal is carried out to filtering processing, calculate the signal energy in different frequency bands, the energy spectrum forming is as characteristic vector, with the characteristic vector Training RBF Neural Network of dissimilar interference, the signal of Real-time Collection draws intrusion model information by RBF neural net, and intrusion model information exchange is crossed to router be sent to each client.
- 4. as claimed in claim 1 can be with the optical fiber distributed perturbation length of video interlink apart from circumference safety monitoring equipment, it is characterized in that, detector module comprises amplification and filter circuit, A/D change-over circuit, photodetector, the two ways of optical signals of forward-propagating and backpropagation in the optical cable of photodetector reception sensor-based system, light signal is converted to the signal of telecommunication by photodetector, and through amplifying and filter circuit, A/D change-over circuit is transferred to capture card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410055709.1A CN103780883A (en) | 2014-02-19 | 2014-02-19 | All-fiber perimeter security monitoring equipment capable of being in linkage with video |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410055709.1A CN103780883A (en) | 2014-02-19 | 2014-02-19 | All-fiber perimeter security monitoring equipment capable of being in linkage with video |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103780883A true CN103780883A (en) | 2014-05-07 |
Family
ID=50572659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410055709.1A Pending CN103780883A (en) | 2014-02-19 | 2014-02-19 | All-fiber perimeter security monitoring equipment capable of being in linkage with video |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103780883A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106327756A (en) * | 2015-06-26 | 2017-01-11 | 奇点新源国际技术开发(北京)有限公司 | Perimeter security and protection system |
| CN106803322A (en) * | 2015-11-26 | 2017-06-06 | 普天信息技术有限公司 | A kind of anti-limited region dividing method |
| WO2017120692A1 (en) * | 2016-01-11 | 2017-07-20 | 张北江 | Method and system for implementing intelligent surveillance system |
| CN108806144A (en) * | 2018-07-02 | 2018-11-13 | 俞雪利 | A kind of community alarm system based on 5G networks |
| CN108986364A (en) * | 2018-08-28 | 2018-12-11 | 苏州三股道信息科技有限公司 | Perimeter security crime prevention system and method |
| CN110225314A (en) * | 2019-07-08 | 2019-09-10 | 浙江大华技术股份有限公司 | A kind of image display method and device of event linkage |
| CN111554061A (en) * | 2020-05-08 | 2020-08-18 | 武汉理工大学 | Intelligent perimeter security system fusing distributed optical fiber sensor and camera |
| CN111901217A (en) * | 2020-06-05 | 2020-11-06 | 吉林大学 | Key area land-air integrated warning system based on microvibration perception |
| CN112542014A (en) * | 2020-10-27 | 2021-03-23 | 国网浙江省电力有限公司杭州供电公司 | Power cable external damage prevention system based on biological induction |
| CN113405646A (en) * | 2021-06-17 | 2021-09-17 | 润智科技有限公司 | Distributed vibration identification method based on dual-channel phi-OTDR (optical time Domain reflectometer) underground optical cable |
| CN113691772A (en) * | 2021-07-22 | 2021-11-23 | 高新兴讯美科技股份有限公司 | System and method for automatically tracking action track of person through video |
| CN114170748A (en) * | 2021-12-06 | 2022-03-11 | 吉林省荣发科技有限公司 | Intelligent early warning method, device and system for invisible boundary |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004016490U1 (en) * | 2004-10-25 | 2005-01-20 | Tranwo Technology Corp., Jubei | Digital video recorder especially for use in domestic security systems has a single chip containing the required data processing circuits and interfaces for connection of one or more types of flash memory card or stick |
| CN102737462A (en) * | 2012-06-29 | 2012-10-17 | 天津大学 | Optical fiber distributed disturbance and video linkage long-distance circumference security monitoring system |
-
2014
- 2014-02-19 CN CN201410055709.1A patent/CN103780883A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004016490U1 (en) * | 2004-10-25 | 2005-01-20 | Tranwo Technology Corp., Jubei | Digital video recorder especially for use in domestic security systems has a single chip containing the required data processing circuits and interfaces for connection of one or more types of flash memory card or stick |
| CN102737462A (en) * | 2012-06-29 | 2012-10-17 | 天津大学 | Optical fiber distributed disturbance and video linkage long-distance circumference security monitoring system |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106327756A (en) * | 2015-06-26 | 2017-01-11 | 奇点新源国际技术开发(北京)有限公司 | Perimeter security and protection system |
| CN106803322A (en) * | 2015-11-26 | 2017-06-06 | 普天信息技术有限公司 | A kind of anti-limited region dividing method |
| CN106803322B (en) * | 2015-11-26 | 2019-05-17 | 普天信息技术有限公司 | A kind of anti-limited region dividing method |
| WO2017120692A1 (en) * | 2016-01-11 | 2017-07-20 | 张北江 | Method and system for implementing intelligent surveillance system |
| CN108806144A (en) * | 2018-07-02 | 2018-11-13 | 俞雪利 | A kind of community alarm system based on 5G networks |
| CN108986364A (en) * | 2018-08-28 | 2018-12-11 | 苏州三股道信息科技有限公司 | Perimeter security crime prevention system and method |
| CN110225314A (en) * | 2019-07-08 | 2019-09-10 | 浙江大华技术股份有限公司 | A kind of image display method and device of event linkage |
| CN111554061A (en) * | 2020-05-08 | 2020-08-18 | 武汉理工大学 | Intelligent perimeter security system fusing distributed optical fiber sensor and camera |
| CN111901217A (en) * | 2020-06-05 | 2020-11-06 | 吉林大学 | Key area land-air integrated warning system based on microvibration perception |
| CN112542014A (en) * | 2020-10-27 | 2021-03-23 | 国网浙江省电力有限公司杭州供电公司 | Power cable external damage prevention system based on biological induction |
| CN113405646A (en) * | 2021-06-17 | 2021-09-17 | 润智科技有限公司 | Distributed vibration identification method based on dual-channel phi-OTDR (optical time Domain reflectometer) underground optical cable |
| CN113691772A (en) * | 2021-07-22 | 2021-11-23 | 高新兴讯美科技股份有限公司 | System and method for automatically tracking action track of person through video |
| CN114170748A (en) * | 2021-12-06 | 2022-03-11 | 吉林省荣发科技有限公司 | Intelligent early warning method, device and system for invisible boundary |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103780883A (en) | All-fiber perimeter security monitoring equipment capable of being in linkage with video | |
| CN102737462A (en) | Optical fiber distributed disturbance and video linkage long-distance circumference security monitoring system | |
| CN203148460U (en) | Iron tower monitoring system | |
| CN206115620U (en) | Monitoring devices is prevented destroying by optical cable | |
| CN107328465B (en) | Submarine cable vibration monitoring system | |
| CN103824406A (en) | Optical fiber sensing-based tunnel cable invasive detection method and system | |
| CN102147290A (en) | Infrared imaging temperature-monitoring method and system | |
| CN102982639A (en) | Video monitoring optical fiber fence system and using method thereof | |
| CN103323157A (en) | Dynamic monitoring method and device of stress sensitization fiber bragg grating of locking rods of railway turnout switch machine | |
| CN107067609A (en) | Transformer station's optical fiber perimeter security protection monitoring system | |
| CN103208161A (en) | Active detecting type fiber grating cable tunnel security and protection monitoring system | |
| CN102243795A (en) | Intelligent optical fiber sensor applied to security systems | |
| CN105788123B (en) | A kind of method and its system of dynamic realtime monitoring deforestation | |
| CN101916492A (en) | Optical fiber intelligent sensor used in security system | |
| CN107672625A (en) | High-speed railway circumference intrusion alarm system | |
| CN205983716U (en) | Can with disturbance long distance perimeter safety monitoring device of video linkage | |
| CN104635639A (en) | Intelligent building monitoring system based on optical fiber sensing | |
| CN206610396U (en) | A kind of fiber grating fence intrusion alarm detecting system | |
| CN109377691B (en) | Perimeter security early warning system based on fiber grating sensing | |
| CN203799460U (en) | Tunnel cable intrusion detection system based on optical fiber sensing | |
| CN113203049A (en) | Intelligent monitoring and early warning system and method for pipeline safety | |
| CN206819491U (en) | Transformer station's optical fiber perimeter security protection monitoring system | |
| CN105205960B (en) | A kind of optical fiber perimeter intrusion alarm system | |
| CN106781152A (en) | A kind of fiber grating fence intrusion alarm detecting system and method | |
| CN107633633A (en) | Broken early warning system outside a kind of circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140507 |
|
| WD01 | Invention patent application deemed withdrawn after publication |