CN206610396U - A kind of fiber grating fence intrusion alarm detecting system - Google Patents
A kind of fiber grating fence intrusion alarm detecting system Download PDFInfo
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- CN206610396U CN206610396U CN201621477768.9U CN201621477768U CN206610396U CN 206610396 U CN206610396 U CN 206610396U CN 201621477768 U CN201621477768 U CN 201621477768U CN 206610396 U CN206610396 U CN 206610396U
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Abstract
A kind of fiber grating fence intrusion alarm detecting system of the present utility model, including the steel wire rope some as fence, every steel wire rope is respectively connected with fiber grating pulling force meter, fiber grating pulling force meter includes that the stress variation of coupled steel wire rope can be detected and produces the fiber grating of electric signal, fiber grating is connected with optical fiber terminal box by optical cable, optical fiber terminal box is connected with fiber grating demodulation device, fiber grating demodulation device is connected with server, and server is connected with display and audible-visual annunciator.The beneficial effects of the utility model are：Preferably avoid wrong report caused by bird, wind and rain；Under conditions of system sensitivity is ensured, anti-section length can carry out flexible modulation according to on-site actual situations, and installation is very convenient；Scene is without power supply, electromagnetism interference, the features such as with accurate positioning, long lifespan.
Description
Technical field
The utility model is related to a kind of fiber grating fence intrusion alarm detecting system.
Background technology
Safety is the basis that a society and enterprise depend on for existence and development, especially the present in modern science and technology high development
My god, criminal offence tends to be intelligent, and means tend to hiddenization, and the security and guard technology for strengthening modernization is particularly important.Safety is anti-
Model technology is exactly to grow up on this basis, and its set electron, sensing, computer and modern communicationses, in one, are multi-door
The product that section is combined.
Security precautions technology common at present mainly has electrical and optical two types.Wherein electricity is most representative
Technology have leakage cable, infrared intrusion detector and fence；Optics product mainly includes distributed optical fiber vibration
Optical cable, quasi-distributed fiber grating vibrating sensor.By development for many years, these technologies have been mature on the whole, and very
More important occasion has obtained popularization and application, such as military base and border, oil reserve base, natural gas station, oil field, nuclear power plant
Area, power plant, power station, oil-gas pipeline, government bodies, historical relic and museum, large-scale plant area etc., greatly improve these regions
Safety precaution level.
Leakage cable is mainly made up of radiofrequency launcher, receiver, lightning protection device etc., and the emitted cable of transmitter is outwards launched
High-frequency electromagnetic energy, when human body and metallic object are in this regional activity, just cause the disturbance in magnetic field, makes receiver electromagnetic energy quantitative change
Change, and then trigger alarm.Single set warning length of leaky cable is 100 meters, belongs to induction alarm, and having the disadvantage can only defence area report
It is alert, it is impossible to which that accurate addressing, the rate of false alarm of system is high.Infrared intrusion detector is by beam intensity indicator lamp, optical lens, transmitting terminal
With receiving terminal composition, transmitting terminal LED launches a kind of sightless infrared ray, received after optical treatment by receiving terminal, when infrared
When light beam is by shield, receiving terminal sends a signal to main frame, exports a series of actions such as alarm, video interlink.Light beam is easily disliked
The influence of the objects such as bad weather, float thing, branch, rate of false alarm is high, and can not be accurately positioned.Pulse electronic fence system master
To be made up of the controller for integrating impulse ejection, alarming and fence two large divisions, with stop and deterrent effect, peace
Dress is convenient.Have the disadvantage not positioning on a large scale, and do not possess the function of Intelligent Recognition, it is necessary to install lightning protection facility, cable somewhere
Damage will influence the use of whole fence.It follows that electricity circumference product generally existing anti-electromagnetic interference capability it is poor, by
The shortcomings of ambient influnence is big, rate of false alarm is high, positioning precision is poor, service life is short.
With the fast development of optical fiber sensing technology, the research of optical fiber perimeter product increasingly deeply and has obtained rapidly sending out
Exhibition, current optical fiber perimeter product is broadly divided into following several from principle：OTDR technologies based on optical time domain reflection, based on light
The optical sensing technology of fibre interference and the quasi-distributed sensing technology based on fiber grating, these technical schemes are in theory
More ripe, what is had has been successfully applied to market.Optical fiber perimeter intrusion system mainly employs the principle of optical fiber vibration sensing,
Border a small range is obtained by optical fiber or sensor and invades vibration information, and alarm is identified and exported to it, with biography
The system unrivaled advantage of electricity circumference intrusion system.Optical fiber is passive in itself, electromagnetism interference, essential safety；Not by landform
Environment is limited, and suitable harsh weather uses；Judge intrusion behavior by perceiving extraneous vibration information, it is various with Intelligent Recognition
The ability of intrusion behavior, sensitivity is high；Monitoring distance is long, and positioning precision is high；Long lifespan, reliability is high, easy care.
Existing patent（Publication number：CN101871809A）A kind of defense area optical fiber distribution type vibration sensor is disclosed, is adopted
Polarization decay phenomenon caused by stress birfringence in single-mode fiber is avoided with optical method, so as to improve to a certain extent
The stability and reliability of existing fiber perimeter alarm system.Existing patent（Publication number：CN105184319A）With it is existing specially
Profit（Publication number：CN105784099A）It is open that the identification that optical fiber perimeter invades signal is improved using several corresponding software algorithms
Ability, so as to reduce system rate of false alarm.OTDR technique based on optical time domain reflection and the distribution type fiber-optic based on Rayleigh scattering are passed
It is very faint to there is signal in sense technology, the characteristics of signal to noise ratio is extremely low, it is easy to produce wrong report.Although detectable distance compared with
Far, but defence area type positioning is substantially belonged to, its detection accuracy is from tens meters to rice up to a hundred.
Existing patent（Publication number：CN102521939A）A kind of new intrusion prevention system of fiber grating perimeter is disclosed,
Outside invading behavior is perceived using the fiber-optic vibration detector of cascade, and then existing patent（Publication number：
CN102968868A）With existing patent（Publication number：CN103345808A）Again to the identification side of fiber grating circumference intrusion behavior
Method is inquired into and analyzed, and is that the reliability and stability of system are had laid a good foundation.With distributing optical fiber sensing skill
Art is contrasted, and extraneous vibration is obtained using cascaded optical fiber shock sensor based on quasi-distributed fiber grating circumference intrusion system
Information, realizes a wide range of, intellectual monitoring of long range by way of wavelength-division multiplex, with positioning precision height, response speed
Hurry up, the low feature of rate of false alarm.However, the periphery intrusion preventing system based on fiber grating is limited by light source bandwidth, single channel
The number of multiplexing fiber-optic grating only has tens, and multiplexing capacity is extremely limited, causes the detecting devices cost of long range higher.
The shortcoming of conditional electronic fence is that link needs powered operation, by electromagnetic interference, under short circuit or open circuit conditions
Alarm, can be avoided by invasion personnel in many cases（Insulator contact can not trigger alarm）, there is the defect largely failed to report.
The fiber-optic vibration alarm technique that occurs on the market is all to recognize intrusion behavior by induced environment vibration at present, its sensitivity compared with
High and expensive, it is difficult to recognize the influence that the external interferences such as bird, wind and rain are brought to system, rate of false alarm is higher, is not suitable for peace
The other higher occasion of safeguarding grades is used.
The content of the invention
For technical deficiency more than solving, the utility model provides a kind of electromagnetism interference, accurate positioning, uses the longevity
Order long fiber grating fence intrusion alarm detecting system.
The utility model is realized by following measures：
A kind of fiber grating fence intrusion alarm detecting system of the present utility model, including some the steel wire as fence
Rope, every steel wire rope is respectively connected with fiber grating pulling force meter, and the fiber grating pulling force meter is coupled including that can detect
Steel wire rope stress variation and produce the fiber grating of electric signal, the fiber grating is connected with fibre-optic terminus by optical cable
Box, the optical fiber terminal box is connected with fiber grating demodulation device, and the fiber grating demodulation device is connected with server, the service
Device is connected with display and audible-visual annunciator.
Above-mentioned fiber grating pulling force meter includes setting flexible base in the metal shell that one end is fixed, the metal shell
Fiber grating is pasted with piece, the flexible substrates, fiber grating is connected with single fiber cable, and flexible substrates one end is fixed on metal
Shell inner end, the flexible substrates other end is connected with spring and metal pull bar in turn, and the metal pull bar end is with penetrating metal
Steel wire rope in shell is connected.
Above-mentioned some steel wire ropes are horizontally-parallel to be set, and is connected with pillar, every steel wire with two ends in the middle part of steel wire rope
About two connecting plates each parallel to steel wire rope are provided with the pillar at rope two ends, the metal shell end is connected with perpendicular
Straight connecting rod, the connecting rod upper and lower ends are connected with two connecting plates respectively.
Above-mentioned each fiber grating is respectively connected with single fiber cable, and some single fiber cables are connected with optical fiber splitter, the light
Fine shunt is connected with multifiber cable, and the multifiber cable is connected with fiber grating demodulation device.
The beneficial effects of the utility model are：The alarm detector conducts what outside invading behavior was produced by steel wire rope
Pulling force, the detection of paired pulling force is counted by the fiber grating pulling force of connecting steel wire ropes, passes through relatively more instantaneous tension variations amount and institute
The threshold values and state of tension of setting change to recognize intrusion behavior, preferably avoid wrong report caused by bird, wind and rain；Ensuring
Under conditions of system sensitivity, anti-section length can carry out flexible modulation according to on-site actual situations, and installation is very just
It is prompt；Scene is without power supply, electromagnetism interference, the features such as with accurate positioning, long lifespan；With other optics anti-intrusion technology phases
Than the distance that separate unit instrument is monitored is longer, and every kilometer of cost is cheaper, and suitable large-scale popularization is used.
Brief description of the drawings
Fig. 1 is structured flowchart of the present utility model；
Fig. 2 is fiber grating pulling force meter structural representation of the present utility model；
Fig. 3 is fiber grating pulling force meter scheme of installation of the present utility model；
Fig. 4 is separate unit instrument intrusion alarm defence area of the present utility model layout drawing；
Fig. 5 is of the present utility model based on wavelet algorithm signal identification flow chart；
Fig. 6 is that intrusion alarm detecting system of the present utility model perceives extraneous typical sample signal characteristic figure；Wherein a is light
Fine grating tensiometer primary signal figure, b is signal graph after fiber grating pulling force meter wavelet filtering, and c is that fiber grating pulling force meter is small
Wave analysis obtains modulus maximum signal graph.
Wherein, 1 steel wire rope；2 pillars；3 fiber grating pulling force meters；4 fiber optic closures；5 multifiber cables；6 optical fiber terminal boxes；
7 fiber grating demodulation devices；8 servers；9 displays；10 audible-visual annunciators；11 single fiber cables；12 flexible substrates；13 optical fiber light
Grid；14 springs；15 metal pull bars；16 metal shells；17 optical fiber splitters, 18 connecting plates.
Embodiment
Further detailed description is done to the utility model below in conjunction with the accompanying drawings：
The utility model provides a kind of fence intrusion alarm detecting system of fiber grating 13 and method, and core devices are light
Fine grating tensiometer 3, when intrusion behavior occurs, the external force produced by touching fence is transmitted on tensiometer by steel wire rope 1,
So that the Optical wavelength signal of tensiometer changes, and then trigger alarm.The device also can be well to malicious intrusions means
Catch and trigger alarm, rate of failing to report is extremely low, at the same time, blow, rain, alarm will not be triggered under the effect such as bird, it is to avoid
Wrong report.In addition, the system is without power supply, electromagnetism interference has the advantages that accurate positioning, long lifespan, cost performance are high, especially fits
Intrusion alarm for important places such as high-end residential, military base, airport, museum, oil pipelines.
The fence intrusion alarm detecting system of a kind of fiber grating 13 of the present utility model, including some the steel as fence
Cord 1, every steel wire rope 1 is respectively connected with fiber grating pulling force meter 3, and fiber grating pulling force meter 3 includes to detect and its phase
The stress variation of steel wire rope 1 even and the fiber grating 13 for producing electric signal, it is whole that fiber grating 13 is connected with optical fiber by optical cable
Box 6 is held, optical fiber terminal box 6 is connected with the demodulator 7 of fiber grating 13, and the demodulator 7 of fiber grating 13 is connected with server 8, service
Device 8 is connected with display 9 and audible-visual annunciator 10.
Fiber grating pulling force meter 3 includes being provided with flexible substrates 12 in the metal shell 16 that one end is fixed, metal shell 16,
Fiber grating 13 is pasted with the flexible substrates 12, fiber grating 13 is connected with single fiber cable 11, and the one end of flexible substrates 12 is consolidated
The inner end of metal shell 16 is scheduled on, the other end of flexible substrates 12 is connected with spring 14 and metal pull bar 15, metal pull bar 15 in turn
End is connected with the steel wire rope 1 penetrated in metal shell 16.Some steel wire ropes 1 are horizontally-parallel to be set, and in steel wire rope 1
Portion and two ends are connected with pillar 2, the pillar 2 at the every two ends of steel wire rope 1 and are provided with about two each parallel to steel wire rope 1
Connecting plate 18, the end of metal shell 16 is connected with vertical connecting rod, connecting rod upper and lower ends respectively with two phases of connecting plate 18
Connection.Each fiber grating 13 is respectively connected with single fiber cable 11, and some single fiber cables 11 are connected with optical fiber splitter 17, optical fiber point
Road device 17 is connected with multifiber cable 5, and the multifiber cable 5 is connected with the demodulator 7 of fiber grating 13.
The detection method of the fence intrusion alarm detecting system of the utility model fiber grating 13, comprises the following steps：
Step 1, the wavelength signals first to all fiber gratings 13 in defence area are initialized, and fiber grating 13 is real-time
The induced signal that wavelength differs in size is produced according to the stress variation of steel wire rope 1, and is sent to server 8；
Step 2, server 8 is screened to the induced signal that all fiber gratings 13 are sent in defence area, extracts wavelength
Change maximum, and be compared with system thresholds, if less than system thresholds then return to step 2, if greater than equal to system
Threshold values then carries out step 3；
Step 3, wavelet filtering noise reduction first is carried out to induced signal, the method for then taking modulus maximum to judge again extracts special
Parameter is levied, and pattern-recognition and classification are carried out to characteristic parameter, output alarm signal after intrusion model is determined for compliance with.
As shown in figure 1, the fiber grating pulling force meter 3 at defence area two ends is serially connected by steel wire rope 1 by euphroe, steel wire
1 middle part of restricting is supported using jury strut 2, and applies in installation process appropriate pretension to tensiometer, it is ensured that
Its perceptual sensitivity, the distribution form of defence area steel wire rope 1 can be according to the parallel laying layer 2-3 of field demand, to prevent passing through invasion
Behavior.Transducing signal is converged to fiber optic closure 4 by each fiber grating pulling force meter 3 by single fiber cable 11 in single defence area, then
The optical fiber terminal box 6 in control room is linked into by multifiber cable 5.The demodulator 7 of fiber grating 13 is responsible for adopting for sensor signal
Collection and processing, and the data after processing are uploaded to server 8 by the network port.The real time data of 8 pairs of uploads of server is entered
Pretreatment, feature extraction, pattern-recognition, coordinated signals go there is provided powerful intelligent algorithm engine and sample storage capacity, and will
Intrusion behavior is transported to audible-visual annunciator 10 in the form of alarming；Display 9 is used for showing each states of defense zones monitored picture, acousto-optic
Alarm 10 is used for exporting sound and light alarm signal to system, and warning staff is using suitably strick precaution and treatment measures.
As shown in Fig. 2 fiber grating pulling force meter 3 of the present utility model is by single fiber cable 11, flexible substrates 12, fiber grating
13rd, spring 14, metal pull bar 15 and metal shell 16 are constituted.Single fiber cable 11 is used for the signal between adjacent sensors in defence area
Connection and transmission, adopt and fiber grating 13 are fixed in flexible substrates 12 in the method for paste, fiber grating 13 is by stress-strain
Conducted by flexible substrates 12 and arrived by stress-strain, what substantial fiber grating pulling force meter 3 was measured is the dependent variable of flexible substrates 12,
Material, length, sectional area and the bonding method of flexible substrates 12 all directly affect the measured value of fiber grating 13.14, spring
Between flexible substrates 12 and metal pull bar 15, the contractility for transmitting pull bar.Metal pull bar 15 is connected with steel wire rope 1, is used
In the pulling force that steel wire rope 1 is subject to is transmitted into fiber grating pulling force meter 3.Fiber grating 13 and auxiliary are installed on outside aluminum metal
In shell 16, housing plays a part of protecting fiber grating 13, so as to constitute a complete fiber grating pulling force meter 3.
As shown in figure 3, connecting plate 18 is closely connected by two bolts up and down with pillar 2.The conduct of single fiber cable 11
The exit of tensiometer, the connection between transmission and anti-zone sensors for signal.Fiber grating pulling force meter 3 by bolt with
Fixed mount is closely connected, and steel wire rope 1 is used for perceiving the pulling force that outside invading behavior is brought.When outside invading behavior occurs
When, external force is transmitted on tensiometer by steel wire rope 1, changes the Optical wavelength signal of tensiometer, so as to trigger alarm.
As shown in figure 4, by the demodulator 7 of fiber grating 13, the optical fiber cable of 32 cores, optical fiber splitter 17, single-core fiber and
160 defence areas are constituted.The demodulator 7 of fiber grating 13 includes 32 passages, and 32 road fibre optical sensor signals can be demodulated simultaneously, single
The quantity of passage access tensiometer is 20.If installing 4 tensiometers according to every defence area carries out planning and designing, adjacent defence area it
Between distance be 40m, then the fully loaded anti-section length of 1 instrument can reach 6km.It is currently based on the vibrating sensing of fiber grating 13
Circumference intrusion system, the distance that separate unit instrument is monitored is about 2km or so, by contrast, a kind of light that the utility model is mentioned
Fine the fence intrusion alarm detection means of grating 13 and system have higher cost performance, and the meaning of popularization is bigger.
As shown in figure 5, of the present utility model be based on wavelet algorithm signal identification flow chart.The wavelength of sensor is believed first
Number initialized, when the signal for having doubtful intrusion behavior is produced, system is to all the sensors wavelength signals in the defence area
Screening is scanned, wavelength change maximum is extracted, and be compared with system thresholds；Returned again for the signal less than threshold values
Return and screen again, wavelet filtering noise reduction is first carried out for the signal beyond threshold values, the method for then taking modulus maximum to judge again
Extract characteristic signal；Pattern-recognition and classification are finally carried out to characteristic signal, and exports pre-, alarm signal.The algorithm takes two
The method that level judges, it is extraneous to bird, wind and rain etc. caused by signal interference can shield well, enter for tapping, crossing etc.
The behavior of invading can accurately be perceived, positioned, and rate of false alarm is extremely low.
As shown in fig. 6, the data analysing method of the present utility model based on small echo.Wherein a is that fiber grating pulling force meter 3 is former
Beginning signal graph, figure b is signal graph after the wavelet filtering of fiber grating pulling force meter 3, and figure c is that the wavelet analysis of fiber grating pulling force meter 3 is obtained
To modulus maximum signal graph.Because fiber grating 13 is simultaneously sensitive to strain and temperature, the slight change of temperature can cause optical fiber
The collection signal of grating tensiometer 3 produces null offset.Whether it is used for the strain transducer of fiber grating 13 that stress is measured, still
For the temperature sensor of fiber grating 13 of temperature-compensating, inevitably there is noise in the measurement data of collection.In order to effective
Ground is detected and eliminates noise, obtains more reliable data, and the signal gathered using wavelet transformation to fiber grating pulling force meter 3 is carried out
Analysis and processing, so as to reduce the noise of collection signal.Simultaneously as fiber grating pulling force 3 sample frequencys of meter are higher, for area
Divide because different affecting factors cause the transient process of tension variations, improve fiber grating pulling force meter 3 and perceive outside invading behavior
Sensitivity, using the reflection wavelength of wavelet modulus maxima detection fiber grating tensiometer 3 convert, determine pulling force mutation when
Between point, can apply to determine modulus maximum, fault diagnosis, signal recovery, noise reduction filtering etc. with this.
System perceives the pulling force that outside invading behavior is produced by the steel wire rope 1 installed on enclosure wall or fence, then by steel
External tensile force is transmitted on the fiber grating pulling force meter 3 at defence area two ends by cord 1, is changed external tensile force by tensiometer
It is converted into the change of wavelength signals；The demodulator 7 of fiber grating 13 completes demodulation, the processing to wavelength signals, and by after processing
Data upload onto the server 8 by network interface；The real time data and preprocessed signal of 8 pairs of uploads of server carry out analysis summary, lead to
Powerful intelligent algorithm engine and sample storage capacity are crossed, signature analysis, warning output, the map for invading signal to external world is realized
The functions such as positioning, coordinated signals；Audible-visual annunciator 10 is used for exporting sound and light alarm signal, invasion criminal offence is given strong
Warning, while reminding staff that invader is taken precautions against and handled using adequate measures.
Described above is only the preferred embodiment of this patent, it is noted that for the ordinary skill people of the art
For member, on the premise of the art of this patent principle is not departed from, some improvement and replacement can also be made, these improve and replaced
Also it should be regarded as the protection domain of this patent.
Claims (4)
1. a kind of fiber grating fence intrusion alarm detecting system, it is characterised in that：Including the steel wire rope some as fence,
Every steel wire rope is respectively connected with fiber grating pulling force meter, and the fiber grating pulling force meter includes that coupled steel can be detected
The stress variation of cord and the fiber grating for producing electric signal, the fiber grating are connected with optical fiber terminal box by optical cable, institute
State optical fiber terminal box and be connected with fiber grating demodulation device, the fiber grating demodulation device is connected with server, and the server connects
It is connected to display and audible-visual annunciator.
2. fiber grating fence intrusion alarm detecting system according to claim 1, it is characterised in that：The fiber grating pull
Power meter, which includes being provided with flexible substrates, the flexible substrates in the metal shell that one end is fixed, the metal shell, to be pasted with
Fiber grating, fiber grating is connected with single fiber cable, and flexible substrates one end is fixed on metal shell inner end, and flexible substrates are another
End is connected with spring and metal pull bar in turn, and the metal pull bar end is connected with the steel wire rope penetrated in metal shell.
3. fiber grating fence intrusion alarm detecting system according to claim 2, it is characterised in that：Some steel wire rope horizontal strokes
To be arrangeding in parallel, and in the middle part of steel wire rope and two ends are connected with pillar, the pillar at every steel wire rope two ends and are provided with two
Up and down each parallel to the connecting plate of steel wire rope, the metal shell end is connected with above and below vertical connecting rod, the connecting rod
Two ends are connected with two connecting plates respectively.
4. fiber grating fence intrusion alarm detecting system according to claim 1, it is characterised in that：Each fiber grating is equal
Single fiber cable is connected with, some single fiber cables are connected with optical fiber splitter, and the optical fiber splitter is connected with multifiber cable, described
Multifiber cable is connected with fiber grating demodulation device.
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| CN201621477768.9U CN206610396U (en) | 2016-12-30 | 2016-12-30 | A kind of fiber grating fence intrusion alarm detecting system |
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| CN201621477768.9U CN206610396U (en) | 2016-12-30 | 2016-12-30 | A kind of fiber grating fence intrusion alarm detecting system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108510682A (en) * | 2018-05-30 | 2018-09-07 | 迪芬思（天津）智能科技有限公司 | A kind of strain-type tension fence alarm system |
| CN109326070A (en) * | 2018-11-22 | 2019-02-12 | 南京派光信息技术有限公司 | A kind of perimeter security system and circumference security monitor method |
| CN109671233A (en) * | 2018-10-12 | 2019-04-23 | 南京派光信息技术有限公司 | A kind of circumference fence based on fiber-optic probe |
| CN111141412A (en) * | 2019-12-25 | 2020-05-12 | 深圳供电局有限公司 | Cable temperature and anti-theft dual-monitoring method and system and readable storage medium |
| CN112595446A (en) * | 2021-03-02 | 2021-04-02 | 南京派光智慧感知信息技术有限公司 | Stress detection protective fence |
-
2016
- 2016-12-30 CN CN201621477768.9U patent/CN206610396U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108510682A (en) * | 2018-05-30 | 2018-09-07 | 迪芬思（天津）智能科技有限公司 | A kind of strain-type tension fence alarm system |
| CN109671233A (en) * | 2018-10-12 | 2019-04-23 | 南京派光信息技术有限公司 | A kind of circumference fence based on fiber-optic probe |
| CN109326070A (en) * | 2018-11-22 | 2019-02-12 | 南京派光信息技术有限公司 | A kind of perimeter security system and circumference security monitor method |
| CN109326070B (en) * | 2018-11-22 | 2021-01-22 | 南京派光智慧感知信息技术有限公司 | Perimeter security system and perimeter security monitoring method |
| CN111141412A (en) * | 2019-12-25 | 2020-05-12 | 深圳供电局有限公司 | Cable temperature and anti-theft dual-monitoring method and system and readable storage medium |
| CN112595446A (en) * | 2021-03-02 | 2021-04-02 | 南京派光智慧感知信息技术有限公司 | Stress detection protective fence |
| CN112595446B (en) * | 2021-03-02 | 2021-05-28 | 南京派光智慧感知信息技术有限公司 | Stress detection protective fence |
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