CN106781149B - Strain-type tension fence sensor based on theory of the fiber optical - Google Patents
Strain-type tension fence sensor based on theory of the fiber optical Download PDFInfo
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- CN106781149B CN106781149B CN201611092818.6A CN201611092818A CN106781149B CN 106781149 B CN106781149 B CN 106781149B CN 201611092818 A CN201611092818 A CN 201611092818A CN 106781149 B CN106781149 B CN 106781149B
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- Prior art keywords
- plane cam
- fence
- spring mechanism
- mandril
- reciprocal plane
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Classifications
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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
Abstract
The invention discloses a kind of strain-type tension fence sensor based on theory of the fiber optical, including slide bar, reciprocal plane cam, stiff spring mechanism and equal strength foil gauge are fixed with fiber grating on the equal strength foil gauge；Wherein: fence wirerope is fixedly connected with reciprocal plane cam；Slide bar is fixed in a fixing seat, and reciprocal plane cam is set on slide bar, and reciprocal plane cam is also connected with a response agency；The upper surface of the reciprocal plane cam is equipped with multiple concave-convex sections；When the state change of fence wirerope, reciprocal plane cam is driven to translate on slide bar；The stiff spring mechanism includes idler wheel and mandril, and the bottom of stiff spring mechanism is contacted by idler wheel with the upper surface of the reciprocal plane cam, and the top of stiff spring mechanism is contacted by mandril with equal strength foil gauge.The monitoring of the various states such as the invasion of tension fence, drawstring relaxation, drawstring failure can be achieved in the present invention.
Description
Technical field
The invention belongs to optical fiber grating sensing fields, more particularly to a kind of new strain based on grating wavelength demodulation principle
Formula tension fence sensor.
Background technique
Traditional tension fence sensor is all based on electric sensor, and anti-interference ability is not strong, the service life is short, networking energy
Power is poor, and in recent years, fiber grating sensing technology is developed by leaps and bounds, and increasingly by the attention of people from all walks of life, passive explosion-proof resists
Electromagnetic disturbance, corrosion resistance, is easy to distributed networking and the assertive evidences spy such as superior thermal adaptability and stability at pollution resistance
Property, fiber grating sensing technology applications in various fields is accelerated, the alarm technique of grating wavelength demodulation principle is based especially on,
Application in fields such as petrochemical industry, electric power, mineral reserve exploitation, communication, large warehoused, building security protections.But existing fiber grating
Alarm sensor is generally all based on vibration principle, and whole security system, which erects, to be come more complex, and it is higher to report rate of failing to report by mistake,
Cause application range limited.
Summary of the invention
The object of the invention is to enrich fiber grating in security protection report to overcome defect present in the above-mentioned prior art
The application in alert field, provides a kind of fiber grating strain formula tension fence sensor, realizes invasion, the drawstring pine of tension fence
The monitoring of the various states such as relaxation, drawstring failure.
Used technical solution is the present invention for the above-mentioned purpose:
There is provided a kind of strain-type tension fence sensor based on theory of the fiber optical, which is characterized in that including cunning
Bar, reciprocal plane cam, stiff spring mechanism and equal strength foil gauge are fixed with fiber grating on the equal strength foil gauge；Its
In:
Fence wirerope is fixedly connected with reciprocal plane cam；
Slide bar is fixed in a fixing seat, and reciprocal plane cam is set on slide bar, and reciprocal plane cam is also connected with one time
It answers a pager's call structure；The upper surface of the reciprocal plane cam is equipped with multiple concave-convex sections；When the state change of fence wirerope, drive past
Complex plane cam translates on slide bar；
The stiff spring mechanism includes idler wheel and mandril, and the bottom of stiff spring mechanism passes through idler wheel and this is convex toward complex plane
The upper surface of wheel contacts, and the top of stiff spring mechanism is contacted by mandril with equal strength foil gauge.
In sensor of the present invention, the reciprocal plane cam is arranged in by a mounting bracket in stiff spring mechanism
Top, equal strength foil gauge are fixed at the top of the mounting bracket；The stiff spring mechanism further includes shell and spring, shell and peace
Dress bracket is fixedly connected, and mandril is placed in the shell, can freely up and down be moved；Spring is set on mandril, and one end of spring
It is fixedly connected with mounting bracket, the other end is connect with mandril；The bottom of mandril is arranged in by wheel shaft for idler wheel.
In sensor of the present invention, multiple bumps section specifically includes pre- prime area, the pre- original area
The side in domain is equipped with tensioning upper limit region and intrusion alarm region, and the other side of the pre- prime area is equipped with tensioning lower limit area
Domain, relaxation alarm region and tensioning failed areas.
In sensor of the present invention, the response agency is pressure spring, and fence wirerope is initially in pre-strained state
When, pressure spring is also at Pre strained state.
In sensor of the present invention, which is equipped with hanging ring, and fence wirerope is fixedly connected on this
On hanging ring.
In sensor of the present invention, which is equipped with box body, and the pedestal is a part of box body, described
Mounting bracket is fixed on box body；Through-hole there are two setting on the box body, fiber grating and fence wirerope are respectively by logical
Hole wears tray interior.
The beneficial effect comprise that: the present invention is based on the strain-type tension fence of grating wavelength demodulation principle sensings
Reciprocal plane cam is arranged in device, and surface is equipped with multiple concave-convex sections on it；When the state change of fence wirerope, back and forth
Plane cam is translated along slide bar, is changed correspondingly by the active force that stiff spring mechanism top passes to equal strength foil gauge, etc.
The strain generated on intensity foil gauge also changes therewith, final fiber grating generation wavelength due to the variation of foil gauge surface strain
Drift, optic fiber grating wavelength (FBG) demodulator can monitor the state change of tension fence wirerope by the variation of wavelength,
Therefore, it is determined that tension fence status, it can be achieved that tension fence invasion, drawstring relaxation, drawstring failure etc. various states prison
It surveys.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the structural representation of strain-type tension fence sensor of the embodiment of the present invention based on grating wavelength demodulation principle
Figure；
Fig. 2 is the schematic diagram of the reciprocal plane cam of the embodiment of the present invention；
Fig. 3 is the reciprocal plane cam profile traces curve graph of the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Strain-type tension fence sensor of the embodiment of the present invention based on theory of the fiber optical, including it is slide bar 3, reciprocal
Plane cam 5, stiff spring mechanism 8 and equal strength foil gauge 10 are fixed with fiber grating 11 on the equal strength foil gauge 10；Its
In:
Fence wirerope 6 is fixedly connected with reciprocal plane cam 5；
Slide bar 3 is fixed in a fixing seat, and reciprocal plane cam 5 is set on slide bar 3, and reciprocal plane cam 5 is also connected with
One response agency 4；The upper surface of the reciprocal plane cam 5 is equipped with multiple concave-convex sections；When the state change of fence wirerope 6
When, drive reciprocal plane cam 5 to translate on slide bar 3.
The stiff spring mechanism 8 includes idler wheel and mandril, the bottom of stiff spring mechanism 8 by idler wheel and this toward complex plane
The upper surface of cam 5 contacts, and the top of stiff spring mechanism 8 is contacted by mandril with equal strength foil gauge 10.
In one embodiment of the present of invention, as shown in Figure 1, stiff spring mechanism 8 is past at this by a mounting bracket 9 setting
The top of complex plane cam 5, equal strength foil gauge 10 are fixed on 9 top of mounting bracket；The stiff spring mechanism 8 further includes shell
Body and spring, shell are fixedly connected with mounting bracket 9, and mandril is placed in the shell, can freely up and down be moved；Spring is set in top
On bar, and one end of spring is fixedly connected with mounting bracket 9, and the other end is connect with mandril；Idler wheel is arranged by wheel shaft in mandril
Bottom.
Multiple bumps section specifically includes pre- prime area, and the side of the pre- prime area is equipped with tensioning upper limit area
Domain and intrusion alarm region, the other side of the pre- prime area are equipped with tensioning lower limit region, relaxation alarm region and tensioning and lose
Imitate region.
As shown in Figure 1, 2, plane cam contour line is equipped with different location node, spatial position, relative altitude, space
The gradient is different, for distinguishing the different state change of fence steel wire (such as tension, relaxation, fracture).Its principle is: working as steel wire
When rope is in initial alert status, the factors such as temperature and normal external force will lead to the tensioning bounce that wirerope generates normal range (NR),
When Design of Cam Profiles, the influence of tensioning bounce need to be shielded；When wirerope is by invasion external force, big tensioning position is generated
It moves, alarm boss node must be equipped in tensioning direction on cam contour；When wirerope because firmware relaxes to a certain extent, influence pre-
When warning function, tensioning relaxation alarm boss node must be equipped in relaxation direction on cam contour；When wirerope is by external force moment
When cutting, wirerope tensioning is failed, and must be equipped with tensioning Failure Alarm boss node, and cam in no tensioning direction on cam contour
This node need to be reached rapidly；In order to effectively distinguish the above different conditions, the node location on cam contour must have different nodes
Highly, the gradient.
For cam profile curve as shown in figure 3, wherein O is pre- initial point when fence is installed, A is the normal tensioning upper limit, B
For intrusion alarm cut off, A ' is normally to be tensioned lower limit, and B ' is relaxation 1 boundary's point of alarm, and C ' is tensioning failure cut off, rigidity
When the contact wheel shaft of 8 bottom of spring mechanism is by above-mentioned different node locations, it can all generate different differential senses and answer, fiber grating
11 generate different variations, and the instrument of monitoring system is enable accurately to monitor the state change of fence wirerope, thus
Make correct alarm condition output.The regional scope of each node on cam profile curve, vector correlation must be according to difference
Application, flexible design.
As shown in Figure 1, the reciprocal plane cam 5 is equipped with hanging ring 7, fence wirerope 6 is fixedly connected on the hanging ring 7.
Further, which is equipped with box body 1, and the pedestal is a part of box body, and the mounting bracket 9 is solid
It is scheduled on box body 1；Through-hole there are two setting on the box body 1, fiber grating 11 and fence wirerope 6 are worn by through-hole respectively
To inside box body 1.
Fence wirerope 6 is initially in pre-strained state, i.e. pressure spring 4 is also at Pre strained state, when 6 state of fence wirerope
When variation (tension, relaxation, fracture), reciprocal plane cam 5 also bilateral reciprocation therewith drives 8 bottom of stiff spring mechanism
Contact wheel shaft move up and down so that the active force that 8 top of stiff spring mechanism passes to equal strength foil gauge 10 changes correspondingly,
The strain generated on equal strength foil gauge 10 also changes therewith, and final fiber grating 11 is produced because of the variation of foil gauge surface strain
The drift of raw wavelength, optic fiber grating wavelength (FBG) demodulator can monitor the shape of tension fence wirerope 6 by the variation of wavelength
State variation, therefore, it is determined that tension fence status, system completes security monitor.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (5)
1. a kind of strain-type tension fence sensor based on theory of the fiber optical, which is characterized in that including slide bar, back and forth
Plane cam, stiff spring mechanism and equal strength foil gauge are fixed with fiber grating on the equal strength foil gauge；Wherein:
Fence wirerope is fixedly connected with reciprocal plane cam；
Slide bar is fixed in a fixing seat, and reciprocal plane cam is set on slide bar, and reciprocal plane cam is also connected with a links-and-links machine
Structure；The upper surface of the reciprocal plane cam is equipped with multiple concave-convex sections；When the state change of fence wirerope, drive reciprocal flat
Face cam translates on slide bar；Multiple bumps section specifically includes pre- prime area, and the side of the pre- prime area is set
There are tensioning upper limit region and intrusion alarm region, the other side of the pre- prime area is equipped with tensioning lower limit region, relaxation alarm
Region and tensioning failed areas；
The stiff spring mechanism includes idler wheel and mandril, and the bottom of stiff spring mechanism passes through idler wheel and the reciprocal plane cam
Upper surface contact, the top of stiff spring mechanism is contacted by mandril with equal strength foil gauge.
2. sensor according to claim 1, which is characterized in that stiff spring mechanism is arranged by a mounting bracket at this
The top of reciprocal plane cam, equal strength foil gauge are fixed at the top of the mounting bracket；The stiff spring mechanism further includes shell
And spring, shell are fixedly connected with mounting bracket, mandril is placed in the shell, can freely up and down be moved；Spring is set in mandril
On, and one end of spring is fixedly connected with mounting bracket, the other end is connect with mandril；The bottom of mandril is arranged in by wheel shaft for idler wheel
Portion.
3. sensor according to claim 1, which is characterized in that the response agency is pressure spring, and fence wirerope is originally
When in pre-strained state, pressure spring is also at Pre strained state.
4. sensor according to claim 1, which is characterized in that the reciprocal plane cam is equipped with hanging ring, fence steel wire
Rope is fixedly connected on the hanging ring.
5. sensor according to claim 2, which is characterized in that the sensor external is equipped with box body, the mounting bracket
It is fixed on box body；Through-hole there are two setting on the box body, fiber grating and fence wirerope are worn by through-hole respectively
Tray interior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611092818.6A CN106781149B (en) | 2016-11-30 | 2016-11-30 | Strain-type tension fence sensor based on theory of the fiber optical |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611092818.6A CN106781149B (en) | 2016-11-30 | 2016-11-30 | Strain-type tension fence sensor based on theory of the fiber optical |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106781149A CN106781149A (en) | 2017-05-31 |
| CN106781149B true CN106781149B (en) | 2019-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611092818.6A Active CN106781149B (en) | 2016-11-30 | 2016-11-30 | Strain-type tension fence sensor based on theory of the fiber optical |
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Families Citing this family (2)
| 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 |
| CN110164068B (en) * | 2019-06-06 | 2024-04-26 | 南京派光智慧感知信息技术有限公司 | Stress detection guardrail |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2938025Y (en) * | 2006-06-26 | 2007-08-22 | 哈尔滨工业大学 | Fibre-optical raster displacement meter |
| CN201206978Y (en) * | 2008-05-26 | 2009-03-11 | 宁波杉工结构监测与控制工程中心有限公司 | Optical grating displacement sensor |
| CN203231733U (en) * | 2013-03-25 | 2013-10-09 | 中铁二院工程集团有限责任公司 | Stay rope type fiber grating displacement sensor |
| CN104792267A (en) * | 2014-01-21 | 2015-07-22 | 周峰 | High-sensitivity fiber Bragg grating displacement sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4748981B2 (en) * | 2004-12-20 | 2011-08-17 | 株式会社クレヴァシステムズ | Intrusion detection sensor and intrusion detection system |
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- 2016-11-30 CN CN201611092818.6A patent/CN106781149B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2938025Y (en) * | 2006-06-26 | 2007-08-22 | 哈尔滨工业大学 | Fibre-optical raster displacement meter |
| CN201206978Y (en) * | 2008-05-26 | 2009-03-11 | 宁波杉工结构监测与控制工程中心有限公司 | Optical grating displacement sensor |
| CN203231733U (en) * | 2013-03-25 | 2013-10-09 | 中铁二院工程集团有限责任公司 | Stay rope type fiber grating displacement sensor |
| CN104792267A (en) * | 2014-01-21 | 2015-07-22 | 周峰 | High-sensitivity fiber Bragg grating displacement sensor |
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