CN110164068A - A kind of stress detection guardrail - Google Patents
A kind of stress detection guardrail Download PDFInfo
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- CN110164068A CN110164068A CN201910491369.XA CN201910491369A CN110164068A CN 110164068 A CN110164068 A CN 110164068A CN 201910491369 A CN201910491369 A CN 201910491369A CN 110164068 A CN110164068 A CN 110164068A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
-
- 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
Abstract
The invention discloses a kind of stress detection guardrails.Including the identical control-rod of multiple structures, parallel shelf is equipped at least one steel wire cable between any two control-rod, the inner vertical of the shell of control-rod is provided with induction elastic slice, fiber-optic grating sensor is provided on induction elastic slice, one end of steel wire cable is fixed on the first control-rod in any two control-rod, the other end passes through the induction elastic slice in the second control-rod, and it is connected further to one end of a spring, the other end of spring is fixed on the spring fixed seat in the second control-rod, after steel wire cable tenses between two control-rods, steel wire cable is fixedly connected by wire fixer with the induction elastic slice, the fiber-optic grating sensor is connected to fiber Bragg grating (FBG) demodulator by optical cable.The guardrail has composed structure design rationally, can be realized reliable detection and reduces false-alarm detection.
Description
Technical field
The present invention relates to security monitoring technology more particularly to a kind of stress detection guardrails.
Background technique
In the prior art, circumference whole safeguard fence is mainly include the following types: physics lattice confining column, high pressure electric fence, vibration prison
Fence, electronic impulse fence are surveyed, and installs the fence of screen monitoring, infrared monitoring system additional, above traditional whole safeguard fence is all
Have the defects that certain.
Firstly, physics lattice confining column, only exists theoretic deterrent effect, real-time monitoring effect can not be effectively played
Fruit can not learn having outside invasion；High pressure electric fence, risk is high, once there is ignorant person surprisingly to touch, can exist
Life security risk, and in some special places, such as have the region of combustible and explosive articles and region more than flow of the people not
It can be used；Vibration monitoring fence, due to the particularity of sensor, wind and rain weather, birds and beasts touching, environmental resonance etc. can all influence
Monitoring effect, rate of false alarm is very high, can not effectively realize accurate measurements target；Electronic impulse fence, the requirement to environment are non-
In terms of Chang Gao, especially electromagnetic interference, therefore some special places are not available yet；It installs camera shooting additional or is enclosed with infrared equipment
Can all there be interference in column, greasy weather, night monitoring etc..Above-mentioned fence, to invasion signal judgement, rate of false alarm be all it is relatively high,
Excessively sensitive or sensitivity is inadequate.And rate of false alarm is high, then can not reach effective monitoring.
Disclose in the prior art Chinese patent application " a kind of vibration sensing type optical fiber alarm rail " (application No. is
201711062842.X), in the disclosure in this patent, circumference guardrail is wound by metal wire groove body around circumference boundary marker, circumference
Induction optical fiber is provided in guardrail, alarm host machine connection induction optical fiber, metal wire groove body here includes the rectangular U of transversal cross-section
The wire casing and wiring duct cover of type, induction optical fiber are sandwiched between the tooth form bumps in the concave-convex and U-shaped wire casing of tooth form of wiring duct cover.It can be with
Find out, is that induction optical fiber is arranged in metal wire groove body in the patent application, it is main still to be invaded using induction optical fiber
Detection can protect and cover induction optical fiber by the metal wire groove body, and guardrail used in this mode includes metal wire
Groove body also includes induction optical fiber, this mode be not using subsection setup, mainly using induction optical fiber to the induction of vibration and
Identification invasion position, the accuracy of perceptual positioning be not high, it is clear that the cost of this mode is also higher.
Chinese patent " in conjunction with the fiber grating perimeter security system and method for strain information " is also disclosed in the prior art
(Authorization Notice No. CN105243772B) is mounted on fence in the patent of invention, and by detecting optical cable, and uses
Multiple groups sensor is serially connected on detecting optical cable, and this mode is also that the deformation that optical cable generates is passed through biography using optical cable as guardrail
Sensor is perceived and detects invasion situation.Due to connecting sensor using to the mode that optical cable concatenates, existing once has
The problem of optical cable is destroyed or cuts and the protective action of entire optical cable is caused to fail at one, and there is also costs for this mode
High deficiency.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of stress detection guardrails, solve guardrail prison in the prior art
The problem that at high cost, reliability is low and false-alarm probability is high is surveyed in probing.
In order to solve the above technical problems, wrapping one technical scheme adopted by the invention is that provide a kind of stress detection guardrail
The identical control-rod of multiple structure compositions is included, parallel shelf is equipped at least one steel wire cable, institute between any two control-rod
The inner vertical for stating the shell of control-rod is provided with induction elastic slice, is provided with fiber-optic grating sensor on the induction elastic slice, institute
The one end for stating steel wire cable is fixed on the first control-rod in any two control-rod, and the other end passes through any two
The induction elastic slice in the second control-rod in control-rod, and it is connected further to one end of a spring, the spring
The other end be fixed on the spring fixed seat in second control-rod, when the steel wire cable is drawn between two control-rods
Next, the steel wire cable is fixedly connected by wire fixer with the induction elastic slice, and the fiber-optic grating sensor passes through optical cable
It is connected to fiber Bragg grating (FBG) demodulator.
In another embodiment of stress detection guardrail of the present invention, the hull outside of the control-rod is provided with and the steel wire
At least one corresponding cord holder of cable, one end of the steel wire cable are fixed on described in any two control-rod
On the cord holder of one control-rod.
In another embodiment of stress detection guardrail of the present invention, the enclosure interior of the control-rod is additionally provided with limiter,
The steel wire cable is connect by the limiter with one end of the spring again after passing through the induction elastic slice, and the spring is perpendicular
Straight setting, and stretch or bounce back along the vertical direction.
In another embodiment of stress detection guardrail of the present invention, the induction elastic slice is by Boards wall in the control-rod
Shell upper plate and lower plate between, after the steel wire cable tenses between two control-rods, the induction elastic slice
Elastically-deformable vertical state does not occur for holding.
In another embodiment of stress detection guardrail of the present invention, at least one is additionally provided between any two control-rod
It is used to support the support rod of the steel wire cable.
In another embodiment of stress detection guardrail of the present invention, the corresponding support steel is vertically arranged on the support rod
At least one cable limiter of silk thread cable, and the height of the cable limiter is adapted with the height of the cord holder.
In another embodiment of stress detection guardrail of the present invention, the control-rod and the support rod bottom are provided with gold
Belong to pedestal, the metab includes vertical side and horizontal bottom, and the vertical side and horizontal bottom are provided with nut
Fixation hole.
In another embodiment of stress detection guardrail of the present invention, the side wall of the shell of the control-rod is additionally provided with miniature take the photograph
As being additionally provided with combined aural and visual alarm on head and/or the control-rod.
In another embodiment of stress detection guardrail of the present invention, wrapped in the signal of the fiber Bragg grating (FBG) demodulator detection demodulation
It includes steel wire cable and is pulled rear corresponding drawing step signal, detection threshold is pulled by setting, the drawing step is believed
Number validity judged.
In another embodiment of stress detection guardrail of the present invention, wrapped in the signal of the fiber Bragg grating (FBG) demodulator detection demodulation
Cutting step signal corresponding after steel wire cable is cut is included, detection threshold is cut by setting, the cutting step is believed
Number validity judged.
The beneficial effects of the present invention are: the invention discloses a kind of stress detection guardrail, including the identical control of multiple structures
Bar processed, parallel shelf is equipped at least one steel wire cable between any two control-rod, and the inner vertical of the shell of control-rod is set
It is equipped with induction elastic slice, the bottom for incuding elastic slice is provided with fiber-optic grating sensor, and one end of steel wire cable is fixed on any two
The first control-rod in control-rod, the other end passes through the induction elastic slice in the second control-rod, and is connected further to a bullet
One end of spring, the other end of spring are fixed on the spring fixed seat in the second control-rod, when steel wire cable is in two control-rods
Between tense after, steel wire cable is fixedly connected by wire fixer with the induction elastic slice, and the fiber-optic grating sensor passes through light
Cable is connected to fiber Bragg grating (FBG) demodulator.The fence has composed structure design rationally, and cost of implementation is lower, can be realized reliable spy
It surveys and reduces false-alarm detection.
Detailed description of the invention
Fig. 1 is the composition figure of one embodiment of stress detection guardrail according to the present invention；
Fig. 2 is the control-rod composition schematic diagram of another embodiment of stress detection guardrail according to the present invention；
Fig. 3 is the support rod composition schematic diagram of another embodiment of stress detection guardrail according to the present invention；
Fig. 4 is the pedestal composition schematic diagram of another embodiment of stress detection guardrail according to the present invention；
Fig. 5 is the detection signal graph that the steel wire cable of another embodiment of stress detection guardrail according to the present invention is raised；
Fig. 6 is the detection signal graph that the steel wire cable of another embodiment of stress detection guardrail according to the present invention is cut.
Specific embodiment
To facilitate the understanding of the present invention, in the following with reference to the drawings and specific embodiments, the present invention will be described in more detail.
A better embodiment of the invention is given in the attached drawing.But the invention can be realized in many different forms, and unlimited
In this specification described embodiment.On the contrary, purpose of providing these embodiments is makes to the disclosure
Understand more thorough and comprehensive.
It should be noted that unless otherwise defined, all technical and scientific terms used in this specification with belong to
The normally understood meaning of those skilled in the art of the invention is identical.Used term in the description of the invention
It is the purpose in order to describe specific embodiment, is not intended to the limitation present invention.Term "and/or" packet used in this specification
Include any and all combinations of one or more related listed items.
Fig. 1 to Fig. 3 shows the composition schematic diagram of one embodiment of stress detection guardrail of the present invention, wherein having:
1: control-rod, 2: support rod, 3: steel wire cable, 11: the first control-rods, 12: the second control-rods, 13: induction elastic slice,
14: fiber-optic grating sensor, 15: spring, 16: spring fixed seat, 17: shell, 18: wire fixer, 19: limiter, 20: stringing
Device, 21: pedestal, 22: cable limiter, 31: optical cable, 32: (FBG) demodulator.
As depicted in figs. 1 and 2, in the stress detection guardrail embodiment, including the identical control-rod of multiple structure compositions
1, parallel shelf is equipped at least one steel wire cable 3, the inside of the shell 17 of the control-rod 1 between any two control-rod 1
It is vertically arranged with induction elastic slice 13, is provided with fiber-optic grating sensor 14, the optical fiber grating sensing on the induction elastic slice 13
Device 14 is connected to (FBG) demodulator 32 by optical cable 31, and one end of the steel wire cable 3 is fixed in any two control-rod 1
First control-rod 11, the other end pass through the induction elastic slice 13 in the second control-rod 12 in any two control-rod 1,
And it is connected further to one end of a spring 15, the other end of the spring 15 is fixed in second control-rod 12
On spring fixed seat 16, after the steel wire cable 3 tenses between two control-rods 1, the steel wire cable 3 passes through wire fixer
18 are fixedly connected with the induction elastic slice 13.
As can be seen that in this embodiment, all there is independence for any two control-rod, thus may be used
So that the steel wire cable between any two control-rod mutually will not be interfered and be influenced when being monitored, even if there are two controls
Steel wire cable between bar processed is destroyed or cuts, and the steel wire cable that will not be influenced between other two control-rods is supervised
It surveys.It certainly, in this embodiment, is the second control-rod as previous group control-rod for any one control-rod,
Be again as the first control-rod in later group control-rod, therefore have double action, also allow in the present embodiment in this way
The inside composition and external structure of each control-rod are identical, specifications having the same, so both convenient for being replaced,
Be conducive to volume production.In addition, (FBG) demodulator here can simultaneously supervise the steel wire cable between multiple control-rods by optical cable
Control, power supply only needs to power to (FBG) demodulator, therefore the advantage with low energy consumption.
Preferably, the spacing between any two control-rod is can be rationally arranged, example according to the required precision of monitoring
The range that such as spacing is 1 meter to 10 meters.Therefore, the spacing here between any two control-rod actually also determines monitoring
Precision, therefore the precision of the embodiment is regulatable, and in actual application, which is also according to circumstances to exist
Different monitoring positions carries out the laying of differentiation, such as the spacing having is set as 1 meter, and some spacing are set as 5, some spacing
Then it is set as 10 meters.
Preferably, the length of the fiber-optic grating sensor 14 is typically less than or equal to the length of the induction elastic slice 13,
And main purpose on induction elastic slice 13 is arranged in fiber-optic grating sensor is the deformation of detection sensor elastic slice, and incudes the shape of elastic slice
Effect masterpiece can all be had that is, when steel wire cable is struck, raises, cuts by becoming the tensile deformation for stemming primarily from steel wire cable
It uses on induction elastic slice, so that deformation occurs for induction elastic slice, and this deformation will be found out by fiber-optic grating sensor.Therefore,
The lower part in induction elastic slice, top or intermediate position had both can be set in fiber-optic grating sensor, such as was preferably provided at centre
Position is conducive to which root steel wire cable further accurate detection is by external action when there is more steel wire cables in this way
Power and cause incude elastic slice deformation has occurred.
Fiber-optic grating sensor 14 is connected to (FBG) demodulator by optical cable, and (FBG) demodulator generates optical signal and is applied to this by optical cable
Fiber-optic grating sensor 14.Preferably, fiber-optic grating sensor 14 be fiber bragg grating (Fiber Bragg Grating,
Abbreviation FBG).The fiber-optic grating sensor utilize using fiber optic materials light sensitive characteristic (in extraneous incident photon and fibre core germanium from
Son interaction forms the permanent change of refractive index), space phase grating is formed in fibre core, is existed so that light be varied and controlled
Dissemination therein.Its refractive index, in fixed periodic modulation distribution, is a kind of uniform grating, has along optical fiber axial direction
Good wavelength selectivity.After broadband light enters optical fiber, the incident light for meeting specified conditions wavelength is coupled instead at grating
It penetrates, the light of commplementary wave length can be all by unaffected, and reflectance spectrum is in FBG central wavelength lambdaBThere is peak value in place.Preferably,
The central wavelength lambdaBMeet:
λB=2neffΛ
Wherein, λBFor the central wavelength of reflected light；neffFor the effective refractive index of fibre core in sensor；Λ is fiber grating
The space periodic of refractive index modulation.Extraneous stress can cause the variation of refractive index and pitch, lead to the wavelength XBDisplacement, meet
Following linear relationship:
Wherein, Δ λ is wavelength variable quantity, and ε is strain of the optical fiber axial direction after by external force in the sensor, and Δ T is temperature change
Change, PeFor optical fiber strain optical coefficient in the sensor, α is optical fiber thermal expansion coefficient in the sensor, and ζ is optical fiber thermo-optical coeffecient.
In the present embodiment, the active force for being applied to steel wire cable is exactly converted to the deformation of induction elastic slice, Jin Eryou
Fiber-optic grating sensor 14 detects this deformation, and the variation of central wavelength is arrived in reflection, and the change of central wavelength can pass through
(FBG) demodulator carries out demodulation detection.
Preferably, the outside of the shell 17 of the control-rod 1 is vertically arranged with corresponding with the steel wire cable 3 at least one
A cord holder 20, one end of the steel wire cable 3 are fixed on first control-rod 11 in any two control-rod 1
On cord holder 20.
Preferably, at least one branch for being used to support the steel wire cable 3 is additionally provided between any two control-rod 1
Strut 2.
Preferably, corresponding at least one cable limit for supporting the steel wire cable 3 is vertically arranged on the support rod 2
Device 22, and the height of the cable limiter 22 is adapted with the height of the cord holder 20.
Preferably, the inside of the shell 17 of the control-rod 1 is additionally provided with limiter 19, and the steel wire cable 3 passes through institute
It being connect again by the limiter 19 with one end of the spring 15 after stating induction elastic slice 13, the spring 15 is vertically arranged, and
It stretches or bounces back along the vertical direction.The cross directional stretch of steel wire cable is changed into the vertical stretching of spring, it is possible thereby to rationally benefit
With the intracorporal space of shell, there is wider width without requiring shell transversely.
Preferably, upper plate and bottom of the induction elastic slice 13 by shell 17 of the Boards wall in the control-rod 1
Between plate, after the steel wire cable 3 tenses between two control-rods 1, elastic deformation does not occur for the induction elastic slice 13.
Preferably, the control-rod 1 and 2 bottom of the support rod are provided with metab 21, the metab packet
Vertical side and horizontal bottom are included, vertical side is provided with nut fixation hole, fixes from there through the shell of bolt and control-rod
Connection, horizontal bottom are also equipped with nut fixation hole, are fixedly connected from there through bolt with ground or wall.
It is further preferred that as shown in figure 4, the vertical side 41 of the metab is provided with vertical holes 411, horizontal bottom
42 are provided with lateral aperture 421, include multiple circumferential apertures 4111 for being circumferentially arranged and in the circumference for vertical holes 411
The centre bore 4112 of heart setting.Specific in use, can rationally be selected from vertical holes 411 according to application scenarios difference
Corresponding circumferential apertures 4111, such as when needing control-rod substantially vertical vertical with ground, then using centre bore 4112 and perpendicular
Two upward circumferential apertures 4111 of histogram are fixedly connected with the shell of control-rod, when need control-rod and ground with tilt angle
When, then there is the fixed company of shell of two circumferential apertures 4111 and control-rod of corresponding angle using centre bore 4112 and in vertical direction
It connects.
Preferably, the shell of control-rod is made of 1.5mm stainless steel, increases intensity.The induction elastic slice 13 is thickness
Metal plate more than or equal to 1.5mm, the diameter of the steel wire cable 3 are 1.5mm, the length 50mm of the spring 15, line footpath
2.0mm, outer diameter 20mm.Pedestal is designed as angle adjustable, using 2.5mm stainless steel.Support rod uses 1.5mm aluminium alloy, diameter
24mm。
Preferably, when installing and using, fiber-optic grating sensor 14 is first fixed on the induction elastic slice 13 of control-rod by early period
Bottom, do not influence subsequent installation, then incude elastic slice Boards wall in 17 upper and lower bottom plate of shell of control-rod 1, and locate
In vertical state, steel wire cable 3 is through shell and the hole for incuding elastic slice, wire fixer, then by limiter, is linked at spring
On, the other end of spring is fixed on spring fixed seat, at this point, steel wire cable is in relaxed state.The pedestal of control-rod is used
Expansion bolt is fixed on wall or ground, then on the fixed base by shell connection, adjusts angle, with same method,
Support rod is fixed, then steel wire cable is passed through to the cable limiter of support rod, until being connected at the first control-rod, at this time
Steel wire cable through hole position is connected on cord holder, is then again fixed on cord holder outside the first control-rod by screw and nut
On shell, steel wire is still within relaxed state at this time.Then using the wire tensioning device on spanner swivel tightener, locking shape is controlled
Strength used in state (here by lot of experiment validation, obtains a fixed force value, is in steel wire cable and tightens shape
State, while spring displacement amount is certain, to ensure that, when being invaded, the signal parameter value of setting is controllable), in the same way will it make
Other parallel steel wire cables are debugged, directly stuck in intermediate elastic slice and wire then by wire fixer by locking device
On cable, it is now in a kind of equilibrium state.
After being installed, fiber-optic grating sensor is connected to fiber Bragg grating (FBG) demodulator by optical cable, and (FBG) demodulator is powered, connection
To background control system.
Background control system is opened, reads and identifies the current collected signal of fiber grating, while will be passed through early period a large amount of
Obtained design variables value input system is tested, scene carries out test adjustment, modifies parameter value, all systems and numerical value are debugged
Later, entire fence sytsem is completed.When there is foreign body intrusion, steel wire cable is pulled, steel wire cable pulls induction elastic slice, causes to incude
Elastic slice deformation can acquire deformation signal in fiber-optic grating sensor on elastic slice, be sent to (FBG) demodulator, (FBG) demodulator is summarizing moment
To background control system, variable signal value is compared with the preset value after debugging, if changing value is up to or over pre-
If value, then being considered as has personnel's invasion, while backstage starts to alarm；If variable signal is less than preset value, it is considered as no personnel and enters
It invades, such method can be masked effectively " glitch ", such as the animals such as cat, bird, the axis such as heavy rain strong wind day, branch
Steel wire cable deformation caused by stalk, can be improved the accuracy of monitoring.
Corresponding detection senses mode is established to outside invasion situation.Preferably, when steel wire cable, which is pulled, to be raised, enter
When invading personnel or being pressed onto or pull open steel wire cable more than the foreign matter of constant weight, affect the induction elastic slice inside control-rod that shape occurs
Become, which is step signal shown in fig. 5, when the duration is the effect of invasion personnel or foreign matter to steel wire cable
Between, such as common action time is more than 1s.Personnel's invasion is left or animal touches and cable is pulled to leave, and spring can be by wire
Cable and induction elastic slice retract original state, and system is made to restore original balance.Therefore, left side one end of the step signal shown in Fig. 5
The state that the steel wire cable of expression is not pulled, then forms the step signal of a door shape after being pulled, the step signal
Amplitude represents the amplitude that steel wire cable is pulled, and after drawing movement, which is replied, therefore believes in step
Number the right one end indicate state of steel wire cable after drawing.
In Fig. 5, the time is shown in abscissa, the wavelength change for the fiber-optic grating sensor detection that ordinate is shown,
It can be seen that leading to the wavelength change is a step signal after a certain steel wire cable being connected with induction elastic slice is pulled, and
And the amplitude that the step amplitude of the step signal and steel wire cable are pulled is in a linear relationship, can set step amplitude accordingly
Threshold value just carries out effective identification alarm only when the range value of step signal is equal to or more than the threshold value, and is less than
Invalid signals are then considered when the threshold value, can be filtered out without being alerted.
It is preferred, therefore, that including that steel wire cable is pulled rear institute in the signal of the fiber Bragg grating (FBG) demodulator detection demodulation
Corresponding drawing step signal pulls detection threshold by setting, judges the validity of the drawing step signal.
It is further preferred that the side wall of the shell in control-rod, i.e., be provided with miniature prison on the side wall of opposite direction steel wire cable
Camera, such as monitoring camera used in mobile phone are controlled, this camera has the spy of small in size, low-power consumption and wide visual field
Point is also convenient in the hidden installation of the side wall of shell.Also, the monitoring camera is not switched on work under normal conditions, but works as
After the drawing step signal that the fiber Bragg grating (FBG) demodulator detection solution is transferred to is greater than or equal to drawing detection threshold, then triggers this and take the photograph
As head booting work, is taken pictures or recorded a video to monitoring scene.In addition, combined aural and visual alarm is also provided on control-rod, it should
Combined aural and visual alarm is not also switched on work under normal conditions, but the drawing rank being transferred to when fiber Bragg grating (FBG) demodulator detection solution
After the signal that jumps is greater than or equal to drawing detection threshold, then combined aural and visual alarm booting work is triggered, audible and visual alarm deterrence is realized, reduces
With avoid invasion.
Preferably, due to be connected steel wire cable at least one of induction elastic slice, it is therefore desirable to measure every single line
Cable individually by pull it is different with traction force corresponding to step signal, and the step signal data are stored, thus may be used
Using as monitoring data, the foundation of the comparative analysis for the later period.In addition, there is also at least one steel wire cables to be pulled simultaneously
The case where, it also will be according to Intrusionaction pattern, it is established that generated step after thering is at least one steel wire cable to be pulled simultaneously
Signal data model, and saved in monitoring model database, the monitoring for the later period is analyzed.
Therefore in the present invention, the behavior that steel wire cable is pulled for disturbance guardrail is arranged according to deformation size and changes
Guardrail stress mornitoring caused by threshold value is filtered the lower deformation of magnitude, such as birds are stood on steel wire cable changes
It can be filtered because alarm threshold value is not achieved, to realize the small sample perturbations for not needing alarm to branch, bird, wind and rain etc.
Behavior is effectively filtered out, and system rate of false alarm is reduced.
Preferably, when steel wire cable is cut, when the personnel of invasion are using the invasion of steel wire cable is cut, incude elastic slice meeting
Reversed rebound occurs, built-in grating sensor detects lasting stress variation, which is rank after the disconnection of steel wire cable
It is as shown in Figure 6 to cut test signal for transition and irreversible.
In the embodiment shown in fig. 6, include monitoring signals variation diagram that 4 steel wire cables are cut, including
The step signal A1 that a piece steel wire cable is cut, the step signal A2 that second steel wire cable is cut, third root wire
The step signal A3 that cable is cut, the step signal A4 that the 4th steel wire cable is cut.The amplitude of these step signals changes
The state status that corresponding steel wire cable is cut directly is reacted.And it is seen that after every piece steel wire cable by cutting,
The amplitude of the step signal will be kept, and without the corresponding signal condition back to before cutting, this is and drawing steel wire cable
There is significant difference place.
It can establish the step signal data that individual wire cable is cut, and the data stored, in reality
The characteristics of being changed according to step signal in detection, and compared with the step signal data of storage, thus judge steel wire
The case where cable is cut.It is preferred, therefore, that including steel wire cable quilt in the signal of the fiber Bragg grating (FBG) demodulator detection demodulation
Corresponding cutting step signal after cutting cuts detection threshold by setting, to the validity for cutting step signal into
Row judgement.
Preferably, the booting work of miniature monitoring camera and combined aural and visual alarm above-mentioned is also applied for cutting step letter
Number detection, i.e., when fiber Bragg grating (FBG) demodulator detection demodulation cutting step signal be greater than or equal to cut detection threshold when, touching
Send out monitoring camera miniature and combined aural and visual alarm booting work.
In the present invention, for the behavior for cutting steel wire cable, change threshold is arranged according to induction elastic slice deformation size, to amount
Lower the loosenings deformation of grade is filtered, such as fence stress mornitoring variation caused by the expanding with heat and contract with cold of steel wire cable can be because of reaching
It is filtered less than alarm threshold value, to realize the row for causing strain variation etc. not need alarm slowly varying to natural environment
To be effectively filtered out, system rate of false alarm is reduced.
If it is there is personnel to cut cable invasion, or the foreign matter for having branch etc, the spring of connection steel wire cable can be drawn
Dynamic steel wire cable and induction elastic slice, make induction elastic slice be constantly in a kind of constant deformed state, at this time fiber-optic grating sensor
The real-time tracer signal of meeting, passes to (FBG) demodulator one invariable signal intensity value, and (FBG) demodulator can carry out pre- according to this state
Alert prompt, according to the size of change amount signal, judgement is that personnel's invasion or branch hang pressure, and background system has preset cutting line
When cable, elastic slice deformation signal variable quantity.
Preferably, which is laid with around the building for needing security protection, and every 10 meter of -30 meter ampere fills one
A control-rod sets up several support rods between every two control-rod, for setting up supporting steel wire cable.
Preferably, control-rod height 600mm, sets up four groups of steel wire cables from top to bottom, and steel wire cable is connected to induction bullet
Piece and spring, after being installed, the pulling force of steel wire cable and the pulling force of spring are in the state balanced, and steel wire elastic slice is basic
Keep the vertical state of non-deformation pair.
Each control-rod is equipped with one group of optic-fiber monitoring system and Signal Analysis System, every group of Signal Analysis System all link to
Backstage general control system is analyzed and is monitored for signal.After all systems are installed, start backstage general control system, open
Beginning perimeter security real-time monitoring, system will record an induction elastic slice deformation quantity signal at this time, believe as initial standard parameter
Number, then further according to a large amount of experimental result early period, setting one is judged as that personnel invade shown signal intensity magnitude.
When there is personnel's invasion, steel wire cable is pulled, one end of connecting spring has displacement, while pulling induction elastic slice, makes
Certain bending is had at original vertical elastic slice, after release, cable and induction elastic slice can be retracted original state by the pulling force of spring,
The fiber-optic grating sensor for keeping balance, and being fixed on induction elastic slice can moment tracer signal, analyze change amount signal, and it is pre-
If value compares, so that whether conclude has personnel's invasion.In addition, invaded if there is personnel cut steel wire cable, due to
Cable is cut, and is acted on by spring tension, and cable reverse movement pulls intermediate elastic slice reversal deformation, at this time the sensor on elastic slice
Moment deformation signal information can be recorded, be transferred to (FBG) demodulator and backstage exchange, analyzed, compared, being judged as has personnel's invasion
The case where, while according to the number judgement invasion personnel positions of the analysis system of transmission signal.In addition, the invention is compared to direct
Sensor is mounted on the situation on cable, can effectively filter out interference information, such as animal pulls cable, plant strut
It falls off, strong wind and heavy rain etc..The efficiency of monitoring can be improved, reduce wrong report.
It can be seen that the invention discloses a kind of stress detection guardrail, including the identical control-rod of multiple structures, any
Parallel shelf is equipped at least one steel wire cable between two control-rods, and the inner vertical of the shell of control-rod is provided with induction bullet
Piece, the bottom for incuding elastic slice are provided with fiber-optic grating sensor, and one end of steel wire cable is fixed in any two control-rod
First control-rod, the other end passes through the induction elastic slice in the second control-rod, and is connected further to one end of a spring, bullet
The other end of spring is fixed on the spring fixed seat in the second control-rod, after steel wire cable tenses between two control-rods,
Steel wire cable is fixedly connected by wire fixer with the induction elastic slice, and the fiber-optic grating sensor is connected to optical fiber by optical cable
Grating demodulation instrument.The fence has composed structure design rationally, and cost of implementation is lower, can be realized reliable detection and reduces false-alarm
Detection.
The above is only the embodiment of the present invention, are not intended to limit the scope of the invention, all to be said using the present invention
Equivalent structure transformation made by bright book and accompanying drawing content, is applied directly or indirectly in other relevant technical fields, and includes
In scope of patent protection of the invention.
Claims (10)
1. a kind of stress detection guardrail, which is characterized in that including the identical control-rod of multiple structure compositions, controlled in any two
Parallel shelf is equipped at least one steel wire cable between bar, and the inner vertical of the shell of the control-rod is provided with induction elastic slice, institute
It states and is provided with fiber-optic grating sensor on induction elastic slice, one end of the steel wire cable is fixed in any two control-rod
The first control-rod, the other end pass through any two control-rod in the second control-rod in the induction elastic slice, and
It is connected further to one end of a spring, the other end of the spring is fixed on the spring fixed seat in second control-rod
On, after the steel wire cable tenses between two control-rods, the steel wire cable passes through wire fixer and the induction elastic slice
It is fixedly connected, the fiber-optic grating sensor is connected to fiber Bragg grating (FBG) demodulator by optical cable.
2. stress detection guardrail according to claim 1, which is characterized in that the hull outside of the control-rod be provided with
At least one corresponding cord holder of the steel wire cable, one end of the steel wire cable is fixed in any two control-rod
First control-rod cord holder on.
3. stress detection guardrail according to claim 1 or 2, which is characterized in that the enclosure interior of the control-rod is also set
It is equipped with limiter, the steel wire cable is connected by one end of the limiter and the spring again after passing through the induction elastic slice
It connects, the spring is vertically arranged, and is stretched or bounced back along the vertical direction.
4. stress detection guardrail according to claim 3, which is characterized in that the induction elastic slice is by Boards wall in institute
It states between the upper plate and lower plate of the shell of control-rod, it is described after the steel wire cable tenses between two control-rods
Elastically-deformable vertical state does not occur for induction elastic slice holding.
5. stress detection guardrail according to claim 2, which is characterized in that be additionally provided between any two control-rod
At least one is used to support the support rod of the steel wire cable.
6. stress detection guardrail according to claim 5, which is characterized in that be vertically arranged with corresponding branch on the support rod
Support at least one cable limiter of the steel wire cable, and the height of the height of the cable limiter and the cord holder
It is adapted.
7. stress detection guardrail according to claim 5 or 6, which is characterized in that the control-rod and the support rod bottom
Portion is provided with metab, and the metab includes vertical side and horizontal bottom, the vertical side and horizontal bottom
It is provided with nut fixation hole.
8. stress detection guardrail according to claim 7, which is characterized in that the side wall of the shell of the control-rod is also set up
Have and is additionally provided with combined aural and visual alarm on miniature webcam and/or the control-rod.
9. stress detection guardrail according to claim 1, which is characterized in that the fiber Bragg grating (FBG) demodulator detection demodulation
Include that steel wire cable is pulled rear corresponding drawing step signal in signal, detection threshold is pulled by setting, is led to described
The validity of step signal is drawn to be judged.
10. stress detection guardrail according to claim 1, which is characterized in that the fiber Bragg grating (FBG) demodulator detection demodulation
Signal in include cutting step signal corresponding after steel wire cable is cut, detection threshold is cut by setting, to described
The validity for cutting step signal is judged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910491369.XA CN110164068B (en) | 2019-06-06 | Stress detection guardrail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910491369.XA CN110164068B (en) | 2019-06-06 | Stress detection guardrail |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110164068A true CN110164068A (en) | 2019-08-23 |
| CN110164068B CN110164068B (en) | 2024-04-26 |
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| CN110992619A (en) * | 2019-11-22 | 2020-04-10 | 郑州祥和集团有限公司 | Electric power tunnel anti-intrusion device and detection method thereof |
| 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 |
| CN115560894A (en) * | 2022-08-24 | 2023-01-03 | 江苏智纤科技有限公司 | Carbon fiber flexible pressure distributed sensing device |
| CN116311716A (en) * | 2022-12-27 | 2023-06-23 | 江苏兴力工程管理有限公司新兴分公司 | Electronic power grid fence system based on intelligent strain type and guard method |
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