CN107862821A - A kind of perimeter security system - Google Patents
A kind of perimeter security system Download PDFInfo
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- CN107862821A CN107862821A CN201711314289.4A CN201711314289A CN107862821A CN 107862821 A CN107862821 A CN 107862821A CN 201711314289 A CN201711314289 A CN 201711314289A CN 107862821 A CN107862821 A CN 107862821A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
- G08B13/122—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a perimeter fence
- G08B13/124—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a perimeter fence with the breaking or disturbance being optically detected, e.g. optical fibers in the perimeter fence
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- Burglar Alarm Systems (AREA)
Abstract
The invention discloses the invasion sensing detection unit and signal processing unit of a kind of perimeter security system, including communication connection, it is characterised in that：The invasion sensing detection unit includes multiple fibre optical sensors around defence area distribution, and the fibre optical sensor is commonly connected on a coupler by optical fiber, and light source and fiber-optic signal detection means are also associated with the coupler；The signal processing unit includes signal analysis and processing module, for handling the fiber-optic signal received from invasion sensing detection unit, and judges whether the fiber-optic signal belongs to invasion signal.The perimeter security system of the present invention detects invasion signal using fiber optic sensor technology, can more in time, efficiently detect intrusion event, and Fibre Optical Sensor has not by the superperformance of electromagnetic interference so that detection of the fibre optical sensor to intrusion event is accurately, stably.
Description
Technical field
The present invention relates to technical field of safety protection, more particularly to a kind of efficient, stabilization and lower-cost circumference security protection
System.
Background technology
Due to the growth that the increase and international terrorist activity of the wealth of society threaten, circumference security protection is increasingly by people
Attention, from military affairs, national defence, finance, science and technology to various aspects such as social safeties.Traditional perimeter security system such as leaky cable
It is anti-that although system, active infrared can reach safety to a certain extent to the system of penetrating, microwave wall system, pulse electronic fence etc.
The effect of model, but technical disadvantages, it is also obvious that for example rate of false alarm is high, not prompt enough, the backup to intrusion event is reacted in invasion
Without rule, the no system of processing to invading signal etc..In addition, invasion information can not retain, it is impossible to automatic decision invasion row
For running into same invasion information still needs which kind of invasion mode artificial judgement belongs to.And existing technical scheme is from generation
Responding to intrusions this period is intruded into, intrusion behavior is difficult to catch, and security is difficult to ensure that, important place will cause danger.
In addition, in existing video technique scheme, there is dead angle in camera, screen monitoring is because screen is numerous, and it also requires paying pole
Big human cost is implemented to monitor in real time, and human negligence causes the dangerous probability occurred also very big.This causes dangerous invasion
Behavior in time, can not be handled real-time, effectively, it is impossible to which required protection place is effectively protected.Further, mesh
In the scheme of preceding video monitoring protection, the information data storing amount that need to be preserved is excessive, and cost is higher.
The content of the invention
It is an object of the invention to solve the above problems, there is provided a kind of efficient, stabilization and lower-cost circumference security protection system
System.
The object of the present invention is achieved like this, a kind of perimeter security system, includes the invasion sensing of communication connection
Detection unit and signal processing unit, the invasion sensing detection unit include multiple Fibre Optical Sensors around defence area distribution
Device, the fibre optical sensor are commonly connected on a coupler by optical fiber, and light source and light are also associated with the coupler
Optical fiber signaling detection means；The signal processing unit includes signal analysis and processing module, for received from invasion sensing
The fiber-optic signal of detection unit is handled, and judges whether the fiber-optic signal belongs to invasion signal.
Preferably, the fibre optical sensor is fiber-optic grating sensor, and multiple fiber-optic grating sensors pass through length
Time delay optical fiber be connected with the coupler.
It is further preferred that the fiber grating is phase-shifted fiber grating.Further, π phase shift optical fiber light can be used
Grid.
Preferably, the fiber-optic grating sensor includes protection sleeve pipe and the optical fiber being arranged in the protection sleeve pipe,
Fiber grating and weight block are provided with optical fiber in the protection sleeve pipe, the weight block is used for when external force acts on optical fiber
During grating sensor, the fiber-optic vibration in protection sleeve pipe is driven.
Preferably, the protection sleeve pipe both ends are connected with two fixed ends respectively, the light in the protection sleeve pipe
Fibre is connected at least across a fixed end with the fiber segment outside protection sleeve pipe.
Preferably, the safety-protection system also includes the database server with signal processing unit communication connection, to deposit
Storage invasion information data.
Preferably, the signal processing unit also includes memory module, and signal data is invaded for storing.
Preferably, the perimeter security system also includes the mobile terminal with signal processing unit communication connection, institute
Mobile terminal is stated to send security protection instruction to security protection actuating station.
Preferably, the security protection actuating station includes aircraft, and the aircraft is used to object is performed to trace and monitor to appoint
Business.
It is further preferred that the unmanned plane of the aircraft, depth camera and thermal infrared device, heat are carried on unmanned plane
Infrared facility is used to perceive invader, and depth camera can track invader according to skeleton tracing algorithm.
Preferably, the memory module is stored with different types of invasion signal model, and signal analysis and processing module passes through
Fiber-optic signal received from invasion sensing detection unit and the invasion signal model are analyzed, and judge institute
State whether fiber-optic signal belongs to invasion signal.
Preferably, also it is stored with abnormal signal threshold data in the storage module and invades signal model, at signal analysis
Reason module is first contrasted the fiber-optic signal received from invasion sensing detection unit with the abnormal signal threshold data,
If exceeding the threshold range, the fiber-optic signal is further compared with invasion signal model, judges the optical fiber
Whether signal belongs to invasion signal.
It is further preferred that when the fiber-optic signal received from invasion sensing detection unit exceeds abnormal signal threshold value
When, if the fiber-optic signal matches with any invasion signal model stored, signal processing unit is sent to the mobile terminal
Intrusion event signal, signal processing unit send the command signal for performing monitoring to the aircraft simultaneously；If the optical fiber letter
Number mismatched with the invasion signal model stored, signal processing unit then only sends fiber-optic signal to mobile terminal.
Preferably, the invasion information data stored in the database server includes invasion and recorded, and invasion signal
Model.
Preferably, the signal memory module is also stored with the address book data of specified security protection mechanism, is easy to directly pass through
The wireless communication module of signal processing unit transmits into specified security protection mechanism and invades information.
Compared to existing perimeter security system, the advantage of safety-protection system of the invention is embodied in：Using fibre optical sensor skill
Art detects invasion signal, can more in time, efficiently detect intrusion event, and Fibre Optical Sensor has and not done by electromagnetism
The superperformance disturbed so that detection of the fibre optical sensor to intrusion event is accurately, stably.In addition, the safety-protection system of the present invention leads to
The analyzing and processing to invading signal is crossed, the automatic alarm to intrusion event can be realized, is easy to the security protection associated mechanisms pair of correlation
Intrusion event, which is made, timely to be handled, and avoids the further deterioration of the state of affairs.The safety-protection system of the present invention is finally made from detecting
Alarm, it is intelligent, efficient without adding artificial judgement with regard to that can be automatically performed, and greatly reduce cost.
Brief description of the drawings
Fig. 1 is that the fence of the embodiment of the present invention is deployed troops on garrison duty scheme schematic diagram；
Fig. 2 is the buried schematic diagram of deploying troops on garrison duty of the embodiment of the present invention；
Fig. 3 is the attachment structure schematic diagram of the invasion sensing detection unit of the embodiment of the present invention；
Fig. 4 is the structural representation of the fiber-optic grating sensor of the embodiment of the present invention；
Fig. 5 is the general structure block diagram of the perimeter security system of the embodiment of the present invention；
Fig. 6 is the annexation block diagram of the perimeter security system of the embodiment of the present invention；
Fig. 7 is the signal flow schematic diagram of the safety-protection system of the embodiment of the present invention.
Description of reference numerals
1st, invade sensing detection unit, 11, fiber-optic grating sensor, 111, protection sleeve pipe, 112, weight it is fast, 113,
Fiber grating, 114, fixed end, 12, optical fiber, 13, coupler, 14, fiber-optic signal detection means, 15, light source, 16, fence,
17th, defence area, 2, signal processing unit, 3, database server, 4, mobile terminal, 5, aircraft.
Embodiment
Below in conjunction with the drawings and specific embodiments, perimeter security system of the invention is made and fairly set out, it should is said
Bright, embodiments of the present invention are not limited to the specific embodiment cited by the present invention, and those skilled in the art are not taking off
On the premise of from present inventive concept, the corresponding equivalents carried out are within the scope of the present invention.
Refering to shown in Fig. 1-7, the present invention provides following examples：
A kind of perimeter security system, include the invasion sensing detection unit 1 and signal processing unit 2 of communication connection,
The invasion sensing detection unit includes multiple fibre optical sensors around defence area distribution, and the fibre optical sensor passes through light
Fibre 12 is commonly connected on a coupler 13, and light source 15 and fiber-optic signal detection means 14 are also associated with the coupler；
The signal processing unit includes signal analysis and processing module, for believing the optical fiber received from invasion sensing detection unit
Number handled, and judge whether the fiber-optic signal belongs to invasion signal.
It is that the invasion sensing in fence defence area detects single attachment structure as shown in Figure 1 as preferred embodiment
Schematic diagram, the fibre optical sensor are fiber-optic grating sensor 11, and the light source is LASER Light Source, multiple fiber-optic grating sensors
The time delay optical fiber not waited by length is connected with the coupler 13.The fiber-optic grating sensor needs according to actual security protection can
Deploy troops on garrison duty in multiple different positions along fence, deployed troops on garrison duty so that formula is completely covered to the formation of defence area 17.It is illustrated in figure 2 buried
Defence area is deployed troops on garrison duty scheme schematic diagram, and fiber-optic grating sensor is deployed troops on garrison duty around defence area embedment ground.It is it should be noted that described
Fibre optical sensor can be, but not limited to fiber-optic grating sensor.Preferable as one kind, the fibre optical sensor is phase shift optical fiber
Grating sensor, further, using high-precision π phase-shifted fiber gratings sensor.As shown in figure 3, multiple fiber gratings pass
Sensor is connected to form hub-and-spoke configuration with coupler, passes through the time delay optical fiber not waited in the multiple length of coupler output connection
(L1, L2, L3 ... Ln) accesses π phase-shifted fiber gratings afterwards.When some fiber-optic grating sensor is produced vibration by external disturbance,
It is also different that reflection light pulse caused by the grating of each fiber-optic grating sensor returns to the delay that coupler is undergone.Thus, light
Optical fiber signaling detection means accurately corresponds to each pulse grating according to the different cans of reflected signal.Signal processing unit receives
To after the fiber-optic signal transmitted from fiber-optic signal detection means, accurately identified according to the signal characteristic of different fiber grating sensors
Go out to exist the fiber grating sensor of abnormal signal, and further determine that the position of the fiber grating sensor in the presence of invasion signal.
As preferred embodiment, as shown in figure 4, the fiber-optic grating sensor 11 includes protection sleeve pipe 111 and worn
Optical fiber in the protection sleeve pipe, fiber grating 113 and weight block are provided with the optical fiber in the protection sleeve pipe
112, the weight block is used for when external force acts on fiber-optic grating sensor, drives the fiber-optic vibration in protection sleeve pipe.Enter one
Step, the protection sleeve pipe both ends are connected with two fixed ends 114 respectively, and the optical fiber in the protection sleeve pipe is at least worn
A fixed end is crossed with the fiber segment outside protection sleeve pipe to be connected.Specifically, what the coupler output connected out
Optical fiber is connected through a fixed end with the optical fiber in protection sleeve pipe.As specifically, the mass is bonded in optical fiber
Together, when external force acts on fiber-optic grating sensor so that mass vibrates and drives optical fiber to leave horizontal level, optical fiber
The phase-shifted fiber grating cycle that pulling force changes, the reflection wavelength made change, with the vibration of mass, the amplitude of wavelength
Change corresponding with frequency generation.Fence shown in Fig. 1 is deployed troops on garrison duty in scheme, can be by fiber-optic grating sensor mounting arrangements in fence
On, to sense the vibrational state of fence.As typical, when invader is by destroying or crossing fence and invaded,
Vibration can occur for fence so that fibre optical sensor is forced to produce vibration, and the vibration signal is passed by fiber-optic grating sensor through optical fiber
Fiber-optic signal detection means is directed at, the signal input signal processing unit collected is carried out processing point by fiber-optic signal detection means
Analysis.In buried scheme of deploying troops on garrison duty as shown in Figure 2, when invader swarms into defence area, invader can pass to buried fiber grating
Sensor produces pressure, and fiber-optic grating sensor deforms upon or be pressurized vibration so that fiber-optic signal changes, and the optical fiber is believed
Number via fiber optic conduction to fiber-optic signal detection means, the signal collected carries out Treatment Analysis by signal processing unit.
As preferred embodiment, the safety-protection system also includes the database service with signal processing unit communication connection
Device, to store invasion information data.As specifically, the invasion information data stored in the database server include into
Invade record, and invasion signal model.The invasion record, can by mobile terminal to record the intrusion event occurred
Log in the database server and check invasion record；The invasion signal model can be customized signal model, or
The different types of signal model established according to the invasion signal characteristic corresponding to the different types of intrusion event occurred.
, can be under the database server after signal processing unit receives the signal that invasion sensing detection unit is gathered
Carry and obtain invasion signal model, and the signal gathered and invasion signal model are analyzed, so as to judge to be gathered
Signal whether belong to invasion signal.Invasion signal model can constantly enrich with increase of the invasion type with invading number, can
There is more fast and accurately match-type to burst intrusion behavior from now on.
As preferred embodiment, the signal processing unit also includes memory module, and signal data is invaded for storing.
As a kind of specific embodiment, the memory module is stored with different types of invasion signal model, is illustrated in figure 6 and is stored with
The structured flowchart of the signal processing unit of signal model is invaded, the signal acquisition module of signal processing unit receives invasion signal and passed
Feel the signal of detection unit collection, signal analysis and processing module is by the way that the optical fiber received from invasion sensing detection unit is believed
Number it is analyzed with the invasion signal model of memory module, and judges whether the fiber-optic signal belongs to invasion signal, when
It is judged as after invading signal, is sent by wireless communication module by information is invaded to mobile terminal.
It should be noted that in above two difference embodiment, it can be understood as the signal stored in database server
Model is identical with the invasion signal model that the memory module of signal processing unit stores.In addition, according to being actually needed, will can enter
Invade signal model and be only stored in signal processing unit and be either only stored in database server or be stored in signal transacting simultaneously
In unit and database server.
As a kind of specific embodiment, abnormal signal threshold data and invasion signal mode are stored with the storage module
Type, signal analysis and processing module is first by the fiber-optic signal received from invasion sensing detection unit and the abnormal signal threshold value
Data are contrasted, if exceeding the threshold range, the fiber-optic signal is further compared with invasion signal model,
Judge whether the fiber-optic signal belongs to invasion signal.
The signal processing flow block diagram of the perimeter security system of an embodiment of the present invention is illustrated in figure 7, opens laser
Light source, fibre optical sensor enter intrusion detection state, and the signal of fibre optical sensor collection enters signal processing unit, and passes through
Signal analysis and processing module carries out signal analysis and processing, and signal analysis and processing module is by the signal gathered in real time with invading signal mode
Type is analyzed, such as the feature such as the changes in amplitude of contrast signal, frequency change, judges gathered letter so as to identify
Number whether be invasion signal, if collection signal determining for invasion signal, signal processing unit automatically starting aircraft is to entering
Invade spot and carry out locking monitoring, while invade the storage that signal will be sent to mobile terminal He upload to database server
To invade signal model, after holding the security protection commanding of mobile terminal by checking invasion information, further commander's operation flies
Row device, and notify responding to carry out security protection processing.It should also be specified that it can be distinguished by analyzing different signal characteristics normal
Signal, interference signal and invasion signal.By taking four kinds of common type signals as an example：Wind and rain disturbs, animal climbing, periodicity machine
Tool signal and artificial climbing.Wind and rain interference signal amplitude value is higher than general noise signal, and width in whole interference time
Degree change is smaller, and frequency can be with approximate measure；Amplitude can become big suddenly within some periods when animal climbs, and with random
The features such as property；Period mechanical interference magnitude is relatively stable with frequency, has the features such as very strong correlation；Artificial climbing
When, signal corresponding to the climbing speed, climbing dynamics etc. of people has individual features.As can be seen here, the letter of different event can be passed through
The carry out signal analysis of number feature, different invasion signal models is defined with accurate difference.Further, can be to various rows
To carry out a large amount of signal characteristic tests, and these features are recorded, constantly it is iterated, intrusion behavior divided so as to realize
It is more and more accurate that analysis judges.
It is further preferred that when the fiber-optic signal received from invasion sensing detection unit exceeds abnormal signal threshold value
When, if the fiber-optic signal matches with any invasion signal model stored, signal processing unit is sent to the mobile terminal
Intrusion event signal, signal processing unit send the command signal for performing monitoring to the aircraft simultaneously；If the optical fiber letter
Number being mismatched with the invasion signal model stored, signal processing unit then only sends fiber-optic signal to mobile terminal, with
It is easy to the security protection commanding for holding mobile terminal to determine whether to confirm.As it is further preferably, for more than exception
Signal threshold value and the signal not matched with the invasion signal model stored, security protection commanding can be anti-by being arranged in simultaneously
The monitoring camera in area carries out further judgement and confirmed, for existing simple video monitoring, using the present invention's
After perimeter security system, only it need to need to just start prison in the case where running into abnormal signal and can not be judged to invading signal automatically
Camera is controlled, i.e., under normal monitoring state, without opening monitoring camera, saves human and material resources cost.Further, lead to
The invasion signal assert is crossed after security protection commanding judges, can be carried out the invasion signal as new invasion signal model
Storage.
As preferred embodiment, as shown in figure 5, also including and the letter for the perimeter security system of the embodiment of the present invention
The mobile terminal of number processing unit communication connection, the mobile terminal is sending security protection instruction to security protection actuating station.As tool
Body, the security protection actuating station includes aircraft, and the aircraft, which is used to perform object, traces and monitors task.It is further excellent
Select, the unmanned plane of the aircraft, depth camera and thermal infrared device are carried on unmanned plane, thermal infrared device is used to perceive
Invader, depth camera can track invader according to skeleton tracing algorithm, and by captured real-time invasion situation with picture
Or the mode of video is sent to the mobile terminal, it is easy to security protection cammander to understand invasion dynamic in real time by mobile terminal,
And corresponding security protection of making promptly and accurately is commanded.Further, the security protection actuating station also includes multiple reception signal terminals,
The reception signal terminal is held by the related mechanism of security protection respectively, e.g., police, fire-fighting and medical care etc., is easy to security protection phase
The mechanism of pass is received the invasion information of correlation by reception signal terminal and receives the instruction of mobile terminal transmission in time, in time
Participate in related security protection processing work.
As preferred embodiment, the signal memory module is also stored with the address book data of specified security protection mechanism, just
Information is invaded in directly being transmitted into by the wireless communication module of signal processing unit to specified security protection mechanism.
In the description of embodiments of the invention, it is to be understood that term " on ", " under ", "front", "rear", " left side ",
" right side ", " hard straight ", " level ", " " center ", " top ", " bottom ", " top ", " root ", " interior ", " outer ", " periphery ", " inboard ", " interior
The orientation or position relationship of the instruction such as side ", " outside " are based on orientation shown in the drawings or position relationship, merely to making in retouching
State the present invention and simplify description, rather than indicate or imply that signified device or element there must be specific orientation, with specific
Azimuth configuration and operation, therefore be not considered as limiting the invention.Wherein, the area that " inboard " refers to inside or fenced up
Domain or space." periphery " refers to the region around certain particular elements or specific region.
In the description of embodiments of the invention, term " first ", " second ", " the 3rd ", " the 4th " are only used for describing mesh
, and it is not intended that instruction or hint relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, limit
Surely " first ", " second ", " the 3rd ", the feature of " the 4th " express or implicitly include one or more spy
Sign.In the description of the invention, unless otherwise indicated, " multiple " are meant that two or more.
, it is necessary to illustrate in the description of embodiments of the invention, unless otherwise clearly defined and limited, term
" installation ", " connected ", " connection ", " assembling " should be interpreted broadly, for example, it may be being fixedly connected or detachably connecting
Connect, or be integrally connected；Can be joined directly together, can also be indirectly connected by intermediary, can be two element internals
Connection.For the ordinary skill in the art, above-mentioned term in the present invention specific can be understood with concrete condition
Implication.
In the description of embodiments of the invention, the terms "and/or", only it is a kind of describe affiliated partner pass
Connection relation, expression may have three kinds of relations, for example, A and/or B, can be represented：Individualism A, while A and B be present, individually
These three situations of B be present.In addition, character "/" herein, it is a kind of relation of "or" to typically represent forward-backward correlation object.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of perimeter security system, including the invasion sensing detection unit and signal processing unit of communication connection, it is special
Sign is：The invasion sensing detection unit includes multiple fibre optical sensors around defence area distribution, the Fibre Optical Sensor
Device is commonly connected on a coupler by optical fiber, and light source and fiber-optic signal detection means are also associated with the coupler；
The signal processing unit includes signal analysis and processing module, for believing the optical fiber received from invasion sensing detection unit
Number handled, and judge whether the fiber-optic signal belongs to invasion signal.
2. perimeter security system according to claim 1, it is characterised in that the fibre optical sensor is optical fiber grating sensing
Device, the time delay optical fiber that multiple fiber-optic grating sensors are not waited by length are connected with the coupler.
3. perimeter security system according to claim 2, it is characterised in that the fiber-optic grating sensor includes protective case
Manage and be arranged in the optical fiber in the protection sleeve pipe, fiber grating and weight are provided with the optical fiber in the protection sleeve pipe
Block, the weight block are used for when external force acts on fiber-optic grating sensor, drive the fiber-optic vibration in protection sleeve pipe.
4. perimeter security system according to claim 2, it is characterised in that the safety-protection system also includes and signal transacting
The database server of unit communication connection, to store invasion information data.
5. according to the perimeter security system any one of claim 1-4, it is characterised in that the signal processing unit is also
Including memory module, signal data is invaded for storing.
6. perimeter security system according to claim 2, it is characterised in that the perimeter security system also include with it is described
The mobile terminal of signal processing unit communication connection, the mobile terminal instruct to send security protection to security protection actuating station.
7. perimeter security system according to claim 6, it is characterised in that the security protection actuating station includes aircraft, institute
Aircraft is stated to be used to trace and monitor task to object execution.
8. perimeter security system according to claim 5, it is characterised in that the memory module is stored with different types of
Invade signal model, signal analysis and processing module by by received from invasion sensing detection unit fiber-optic signal with it is described
Invasion signal model is analyzed, and judges whether the fiber-optic signal belongs to invasion signal.
9. perimeter security system according to claim 8, it is characterised in that the signal memory module is also stored with specified
The address book data of security protection mechanism, it is easy to directly send to specified security protection mechanism by the wireless communication module of signal processing unit
Invade information.
10. perimeter security system according to claim 5, it is characterised in that be also stored with abnormal letter in the storage module
Number threshold data and invasion signal model, signal analysis and processing module is first by the optical fiber received from invasion sensing detection unit
Signal is contrasted with the abnormal signal threshold data, if exceeding the threshold range, by the fiber-optic signal further with entering
Invade signal model to be compared, judge whether the fiber-optic signal belongs to invasion signal.
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| 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 |
| CN110853270A (en) * | 2019-10-10 | 2020-02-28 | 北京航天易联科技发展有限公司 | Optical fiber intrusion alarm processing method based on LabVIEW |
| CN111766636A (en) * | 2020-06-29 | 2020-10-13 | 中国人民解放军63983部队 | Military vehicle intrusion recognition device based on multi-source optical fiber sensing |
| CN111862505A (en) * | 2020-07-29 | 2020-10-30 | 杭州巨骐信息科技股份有限公司 | Holographic perception external damage monitoring system |
| CN111862506A (en) * | 2020-07-29 | 2020-10-30 | 杭州巨骐信息科技股份有限公司 | Holographic sensing external force damage monitoring method |
| CN112307961A (en) * | 2020-10-30 | 2021-02-02 | 魏运 | Method and device for processing hybrid optical fiber intrusion signal |
| JPWO2021024388A1 (en) * | 2019-08-06 | 2021-02-11 | ||
| 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 |
| CN112771587A (en) * | 2018-07-10 | 2021-05-07 | 易捷艾玛公司 | Device for accessing underground or ground municipal engineering infrastructure comprising an intrusion detection device |
| CN113720435A (en) * | 2021-09-09 | 2021-11-30 | 长沙深之瞳信息科技有限公司 | Indoor text security fiber sensing system and monitoring method |
| CN114127518A (en) * | 2019-07-17 | 2022-03-01 | 日本电气株式会社 | Optical fiber sensing system, optical fiber sensing apparatus, and abnormality determination method |
| CN115100804A (en) * | 2022-05-10 | 2022-09-23 | 国网浙江宁波市鄞州区供电有限公司 | Multi-zone optical fiber perimeter intrusion detection system and method |
| CN115762025A (en) * | 2022-12-12 | 2023-03-07 | 德昱电力工程设计有限公司 | Intelligent early warning method and system for communication optical cable |
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