CN102889858B - Method for monitoring displacement of anchoring structure by using laser - Google Patents
Method for monitoring displacement of anchoring structure by using laser Download PDFInfo
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- CN102889858B CN102889858B CN201210399733.8A CN201210399733A CN102889858B CN 102889858 B CN102889858 B CN 102889858B CN 201210399733 A CN201210399733 A CN 201210399733A CN 102889858 B CN102889858 B CN 102889858B
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Abstract
The invention discloses a method for monitoring displacement of an anchoring structure by using laser. The method comprises the following steps of: 1) fixedly arranging a laser device outside an anchoring room, fixedly arranging a reflector in the anchoring room, and arranging a laser light spot receiving target on the surface of an anchoring region; 2) reflecting the laser to the laser light spot receiving target by using the reflector; and 3) forming an included angle theta between the reflected laser ray and the target surface of the laser spot receiving target, acquiring the displacement L2 of the laser spot moving on the target surface of the laser spot receiving target, substituting the displacement L2 into a calculation formula L1=L2 tg theta of up-and-down displacement L1 of the laser spot receiving target, and acquiring data such as creepage frequency, amplitude and long-term tendency of the anchoring region. By the method for monitoring the displacement of the anchoring structure by using the laser, the relevant data such as the creepage frequency, the amplitude and the long-term tendency of the anchoring region can be effectively acquired; the method is high in monitoring precision and high in monitoring speed; the anchoring structure can be connected with a network to meet a requirement of an Internet of things; and the method is low in detection cost.
Description
Technical field
The present invention relates to a kind of suspension bridge displacement monitoring method, particularly relate to a kind of method utilizing laser to carry out anchorage structures displacement monitoring.
Background technology
Suspension bridge is one of the most frequently used super-huge, large bridge bridge type, and these large bridges are all in each traffic main artery, invest huge, and investment and maintenance cost are the hat of various bridge type.In operation process, vehicle flowrate is very large, and load is heavy, has immeasurable significance to the development of the national economy.These bridges, once there is security incident, all will cause serious consequence for the economic construction of country and the stable of society.Because Analysis of Suspension Bridges ' Anchorage subjects horizontal force from main push-towing rope and vertical counter-force, it is one of primary load bearing structure.Once anchorage structures destroys, the serious accident that bridge can be caused to ruin people die, consequence is hardly imaginable.
Tunnel-type anchorage must be embedded in the good country rock of engineering geological condition, and therefore in the middle of operation process, the stability of country rock is most important.Water erosion environment can reduce the stability on tunnel-type anchorage country rock and gravity anchor basis, changes the stressed and distortion of anchorage, causes the generation of the diseases such as anchor room cracking and off normal, anchor head and loose cable saddle corrosion, and then affects the operation security of bridge structure.Therefore, carry out safety monitoring for the suspension bridge anchorage zone under water erosion environment very necessary, need for suspension bridge anchorage zone, carry out monitoring and research and develop with technology state evaluating, early warning technology and device.
The technology status that the stressed and distortion of suspension bridge anchorage zone gathers passing judgment on bridge is most important.Monitor structural stress, need to lay many foil gauges or optical fiber, intelligent sensor, cost is very high; And displacement structure is monitored, only need lay minority reference mark in anchorage zone just can the stressed and degree of impairment of inverting anchorage structures.
But also do not have special method and apparatus to carry out precise monitoring to the displacement of anchorage zone at present.
Summary of the invention
For weak point of the prior art, the object of the present invention is to provide a kind of method utilizing laser to carry out anchorage structures displacement monitoring.
In order to solve the problems of the technologies described above, present invention employs following technical scheme:
Utilize laser to carry out the method for anchorage structures displacement monitoring, have employed a kind of laser monitoring device in the method, laser monitoring device comprises laser instrument, reflective mirror and laser facula receiving target; Monitoring method comprises the steps:
1) laser instrument is fixedly mounted on anchor outdoor, reflective mirror is arranged on anchor indoor, laser facula receiving target is arranged on surface, anchorage zone;
2) open laser instrument, adjustment laser beam, reflective mirror and laser facula receiving target, make laser after mirror reflection with certain angular illumination on laser facula receiving target;
3) displacement of anchorage zone on Impact direction is calculated according to the spot displacement on laser facula receiving target:
3.1) angle is had between the target surface of the laser beam after mirror reflection and laser facula receiving target
; In certain detection frequency, to hot spot displacement along target surface movement on the target surface of laser facula receiving target
l 2 gather;
3.2) displacement will at every turn gathered
l 2 bring the displacement that laser facula receiving target moves up and down into
l 1 computing formula:
, calculate the displacement that laser facula receiving target moves up and down
l 1 ;
3.3) peristalsis frequency of anchorage zone, amplitude, long-term tendency related data is obtained.
As a preferred embodiment of the present invention, described laser facula receiving target can be multiple, forms a monitoring surface, realizes the monitoring to anchorage zone overall shape change.
As another kind of preferred version of the present invention, described laser facula receiving target is connected with computing machine, realizes real-time reception and the long term data storage of data.
As another preferred version of the present invention, described laser facula receiving target is connected with Internet or mobile communications network, realizes in long-range data monitoring, storage and analysis.
The invention has the beneficial effects as follows: this method utilizing laser to carry out anchorage structures displacement monitoring effectively can obtain the related datas such as the peristalsis frequency of anchorage zone, amplitude and long-term tendency, monitoring accuracy is high, monitoring velocity is fast, can be directly connected to the network, reaches the requirement of Internet of Things; The method testing cost is low simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation that laser monitoring device is installed;
Fig. 2 is the structural representation before and after laser facula receiving target moves.
In accompanying drawing: 1-laser instrument; 2-reflective mirror; 3-laser facula receiving target; 4-anchorage zone; 5-laser beam; 6-main push-towing rope; 7-cablet; Target surface before 8-movement; Target surface after 9-movement; 10-normal.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, 2, utilize laser to carry out the method for anchorage structures displacement monitoring, have employed a kind of laser monitoring device in the method, laser monitoring device comprises laser instrument 1, reflective mirror 2 and laser facula receiving target 3.
Utilize laser to carry out the method for anchorage structures displacement monitoring, comprise the steps:
1) laser instrument 1 is fixedly mounted on anchor outdoor, reflective mirror 2 is arranged on anchor indoor, laser facula receiving target 3 is arranged on surface, anchorage zone 4.
2) open laser instrument 1, adjustment laser beam 5, reflective mirror 2 and laser facula receiving target 3, make laser through reflective mirror 2 reflect after with certain angular illumination on laser facula receiving target 3.
3) displacement of anchorage zone 5 on Impact direction is calculated according to the spot displacement on laser facula receiving target 3:
3.1) because laser facula receiving target 3 is arranged on anchorage zone 4, when occurring to wriggle up and down when the stressed change in anchorage zone 4, the target surface of laser facula receiving target 3 moves up and down thereupon.Laser facula receiving target 3 through reflective mirror 2 reflect after laser beam and the target surface of laser facula receiving target 3 between have an angle
.In certain detection frequency, to hot spot displacement along target surface movement on the target surface of laser facula receiving target 3
l 2 carry out gathering (set certain monitoring periods or frequency, as 20HZ, then per secondly carry out 20 times to spot displacement and gather and calculate);
3.2) displacement will at every turn gathered
l 2 bring the displacement that laser facula receiving target moves up and down into
l 1 computing formula:
, calculate the displacement that laser facula receiving target moves up and down
l 1 ;
3.3) related datas such as the peristalsis frequency (namely detecting frequency) of anchorage zone, amplitude, long-term tendency are obtained.
The advantage of the method is that the precision of monitoring is high, can arrive 0.05 millimeter; The speed of monitoring is fast, can reach more than 25HZ.Laser facula receiving target is connected with computing machine, realizes real-time reception and the long term data storage of data.Laser facula receiving target is connected with Internet or mobile communications network, realizes in long-range data monitoring, storage and analysis.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of the technical program, it all should be encompassed in the middle of right of the present invention.
Claims (2)
1. utilize laser to carry out the method for anchorage structures displacement monitoring, it is characterized in that, have employed a kind of laser monitoring device in the method, laser monitoring device comprises laser instrument, reflective mirror and laser facula receiving target; Monitoring method comprises the steps:
1) laser instrument is fixedly mounted on anchor outdoor, reflective mirror is fixedly mounted on anchor indoor, laser facula receiving target is arranged on surface, anchorage zone;
2) open laser instrument, adjustment laser beam, reflective mirror and laser facula receiving target, make laser after mirror reflection with certain angular illumination on laser facula receiving target;
3) displacement of anchorage zone on Impact direction is calculated according to the spot displacement on laser facula receiving target:
3.1) angle is had between the target surface of the laser beam after mirror reflection and laser facula receiving target
; In certain detection frequency, to hot spot displacement along target surface movement on the target surface of laser facula receiving target
l 2 gather;
3.2) displacement will at every turn gathered
l 2 bring the displacement that laser facula receiving target moves up and down into
l 1 computing formula:
, calculate the displacement that laser facula receiving target moves up and down
l 1 ;
3.3) peristalsis frequency of anchorage zone, amplitude, long-term tendency related data is obtained;
Described laser facula receiving target is connected with computing machine, realizes real-time reception and the long term data storage of data.
2. the method utilizing laser to carry out anchorage structures displacement monitoring according to claim 1, is characterized in that: described laser facula receiving target is connected with Internet or mobile communications network, realizes in long-range data monitoring, storage and analysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210399733.8A CN102889858B (en) | 2012-10-19 | 2012-10-19 | Method for monitoring displacement of anchoring structure by using laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210399733.8A CN102889858B (en) | 2012-10-19 | 2012-10-19 | Method for monitoring displacement of anchoring structure by using laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102889858A CN102889858A (en) | 2013-01-23 |
| CN102889858B true CN102889858B (en) | 2015-04-22 |
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| CN201210399733.8A Expired - Fee Related CN102889858B (en) | 2012-10-19 | 2012-10-19 | Method for monitoring displacement of anchoring structure by using laser |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165592A (en) * | 2013-05-30 | 2014-11-26 | 国家电网公司 | Switch cabinet trolley displacement monitoring method |
| CN103292711A (en) * | 2013-05-30 | 2013-09-11 | 国家电网公司 | Displacement monitoring device for trolley of switch cabinet |
| CN104330037B (en) * | 2014-11-24 | 2017-02-08 | 重庆交通大学 | Displacement monitoring device and method for laser projection type anchorage structure |
| CN106767444A (en) * | 2017-01-18 | 2017-05-31 | 中国建筑第八工程局有限公司 | A kind of displacement structure monitoring system and related monitoring method |
| CN106970390B (en) * | 2017-04-17 | 2020-10-02 | 三峡大学 | Method and device for measuring telescopic displacement of underground telescopic hollow mechanism |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101315274A (en) * | 2008-06-19 | 2008-12-03 | 西安交通大学 | Monitoring device and real-time monitoring method for bridge vibration deformation |
| CN101344383A (en) * | 2008-09-01 | 2009-01-14 | 扬州大学 | Laser amplifying measurement method for bending structure deformation |
| CN101718529A (en) * | 2009-11-30 | 2010-06-02 | 重庆大学 | Multi-beam deformation detecting device and use method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000227333A (en) * | 1999-02-04 | 2000-08-15 | Ishikawajima Harima Heavy Ind Co Ltd | Shape measuring instrument for bridge |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101315274A (en) * | 2008-06-19 | 2008-12-03 | 西安交通大学 | Monitoring device and real-time monitoring method for bridge vibration deformation |
| CN101344383A (en) * | 2008-09-01 | 2009-01-14 | 扬州大学 | Laser amplifying measurement method for bending structure deformation |
| CN101718529A (en) * | 2009-11-30 | 2010-06-02 | 重庆大学 | Multi-beam deformation detecting device and use method thereof |
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| CN102889858A (en) | 2013-01-23 |
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