CN105157596B - A kind of intelligent electric power comb DEFORMATION MONITORING SYSTEM - Google Patents
A kind of intelligent electric power comb DEFORMATION MONITORING SYSTEM Download PDFInfo
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- CN105157596B CN105157596B CN201510658390.6A CN201510658390A CN105157596B CN 105157596 B CN105157596 B CN 105157596B CN 201510658390 A CN201510658390 A CN 201510658390A CN 105157596 B CN105157596 B CN 105157596B
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Abstract
The present invention relates to a kind of intelligent electric power comb DEFORMATION MONITORING SYSTEMs, and to perceive the deformation of the electricity channel in electricity channel power transmission network, which includes：Distributed sensing fiber：It is arranged on the longitudinal reinforcement of the electricity channel between two electricity channel active wells, to transmit and return inductive signal；Strain acquirement instrument：It is connect with distributed sensing fiber, sends inductive signal to distributed sensing fiber, and receive echo-signal, judge the deformation state of electricity channel；Central server：It is communicated with strain acquirement instrument, generates instruction controlled strain Acquisition Instrument and send frequency, range and the precision of inductive signal, and receive and store the deformation state data of electricity channel；Onsite user's terminal：It is communicated with central server by wireless network in Overhaul site, obtains the deformation state data of electricity channel.Compared with prior art, the present invention has many advantages, such as intellectual monitoring, registration, saves cost.
Description
Technical field
It prevents and reduces natural disasters field the present invention relates to geotechnical engineering, more particularly, to a kind of intelligent electric power comb deformation monitoring system
System.
Background technology
It deepens continuously with the process of Chinese Urbanization, demand of the city to electric power also increasing by geometric progression.And
There is various shortcomings for overhead transmission line：Transmission capacity is small, takes up a large area, and hinders the appearance of the city, weak to anti-natural calamity ability, failure
It occurs frequently, easily causes safety accident etc..Therefore use the modes such as electricity channel that power transmission facility is made to land, become and solves urban electricity supply
The major way of problem.Currently, each city in the whole nation is owned by a huge electricity channel power transmission network.As city life
One of line engineering, supply of electric power is pulled one hair and move the whole body, and how to be taken effective measures and is perceived to existing electricity channel net
To ensure the problem of its operation security becomes current urgent need to resolve.
Electricity channel is generally embedded in below road, and below road and adjacent domain is often excavation of foundation pit, subway work
Or the urban construction activity region the most frequent such as other hidden crossing project constructions.In the process, electricity channel is especially
Damage cracking easily occurs for external wrapping concrete, to lose the ability of protection internal power cable and influence its normal safety fortune
Battalion, and above-mentioned phenomenon is particularly acute in soft clay area.However, electricity channel, as underground engineering with shallow, concealment causes to pass
The monitoring mode of system is difficult to apply as and cable tube caliber is narrow, and high-tension cable is therethrough, therefore is also difficult in cable tube
Lay sensor in portion.It can be seen that perceiving certainly for comb is realized in research, intelligent calandria structure is established, becomes and realizes comb state
The objective requirement of real-time perception.
Intelligence structure is made with controller or using material self character etc. by being embedded to various kinds of sensors in inside configuration
Obtaining structure has and has some desirable bionic functions, such as：From perception, self diagnosis, self-control and reparation, it is
The developing direction of the new and developing branch and Future Projects structure prevented and reduced natural disasters in recent years.But either to structural behaviour
Diagnosis or structure control and adjusting, all rely on the accurate measurement for structure real-time status.
Fiber optic monitoring technology is grown up recently as optical fiber communication technology, by perceiving light in optical fiber transmission process
The novel prison for changing to be monitored of physical features parameter such as intensity (power), wavelength, frequency, phase and the polarization state of wave etc.
Survey technology has, high-precision, highly sensitive；Electromagnetism interference；Electrical insulating property is good；Durability is strong, is suitable for long term monitoring；It is several
What shape-plastic, it is adaptable；Transmission loss is small, it can be achieved that the advantages that detecting over long distances, wherein is based on Brillouin scattering principle
Distributed optical fiber sensing technology in optical fiber, be both transmission medium and sensor, therefore can accomplish to structure super distributed, nothing
The monitoring of seam, but the technology does not have applied to electricity channel malformation from perception operation at present.By distribution type fiber-optic
Sensing technology is applied to the deformation of electricity channel from perceiving in operation, needs to solve problems with：
1, sensor fibre layout scheme in electricity channel, it is efficient lay sensor fibre obtain enough data volumes for pair
The differentiation of comb deformation pattern, and the dosage of optical fiber can be saved.
2, electricity channel structural behaviour method of discrimination, how using the data monitored to electricity channel deformation pattern and work
Differentiated as state.
3, from sensory perceptual system, the workflow of the system generally comprises for electricity channel deformation, perceives, analysis, decision, place
Reason, perceives again, to realize the automation and systematization of entire perception flow.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of intellectual monitoring, positioning
Accurately, the intelligent electric power comb DEFORMATION MONITORING SYSTEM of cost is saved.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of intelligent electric power comb DEFORMATION MONITORING SYSTEM, to perceive the shape of the electricity channel in electricity channel power transmission network
Become, which includes：
Distributed sensing fiber：It is arranged on the longitudinal reinforcement of the electricity channel between two electricity channel active wells, uses
To transmit and return inductive signal；
Strain acquirement instrument：It is connect with distributed sensing fiber, sends inductive signal to distributed sensing fiber, and receive back
Wave signal judges the deformation state of electricity channel；
Central server：It is communicated with strain acquirement instrument, the frequency of generation instruction controlled strain Acquisition Instrument transmission inductive signal,
Range and precision, and receive and store the deformation state data of electricity channel；
Onsite user's terminal：It is communicated with central server by wireless network in Overhaul site, obtains the change of electricity channel
Shape state data.
The longitudinal reinforcement is equipped with a plurality of and is molded with electricity channel formed by integrally casting, and it is transversal to be separately positioned on electricity channel
Midpoint between the apex angle in face and adjacent apex angle.
The distributed sensing fiber in same section of electricity channel be equipped with it is a plurality of, every distributed sensing fiber is being drawn
Parallel binding is on corresponding longitudinal reinforcement under the state of opening.
The both ends of the electricity channel are equipped with opening, and every distributed sensing fiber stretches out opening and adjacent power comb
Sensor fibre connection.
The connector of distributed sensing fiber in the opening of the electricity channel to electricity channel active well passes through soil
Work cloth wraps up or bellows is nested.
A kind of detection method of intelligent electric power comb DEFORMATION MONITORING SYSTEM, includes the following steps：
1) inductive signal of different sample frequencys, spatial resolution and precision is set according to different electricity channels；
2) the original inductive signal strain value that acquisition electricity channel complete working hour initially tests；
3) test inductive signal strain value when electricity channel work is obtained in real time；
4) if existing difference is more than the threshold set between original inductive signal strain value and test inductive signal strain value
Value, then judging this section of electricity channel, there are deformation or cracks, and carry out step 5)；
5) it according to the spatial distribution map of the echo of test inductive signal, obtains this section of electricity channel and deforms upon or crack
Position and direction, according to the acquiring size deformation of difference or the size in crack.
Compared with prior art, the present invention has the following advantages：
The present invention is to carry out system from perception to electricity channel malformation based on Distributed Optical Fiber Sensing Techniques, can be with
Accurately to the deformation of calandria structure, damage is positioned with cracking phenomena, and is assessed influence, right after formation network
The performance of each calandria structure is all accomplished in real time in entire electricity channel network, accurately, efficient to monitor, and realizes that electricity channel becomes
A large amount of manpower and materials costs have been saved in the intelligence of shape sensory perceptual system, structural in the deformation monitoring to runing phase electricity channel
It can have a good application prospect in diagnosis, with the foster work of electricity channel net dimension.
Description of the drawings
Fig. 1 is the electricity channel structure of the present invention and its internal distributed fiber deployment position view.
Fig. 2 is the typical Critical curve that electricity channel deforms in embodiment.
Fig. 3 is the typical Critical curve of electricity channel defect in embodiment, wherein figure (3a) is that the strain of fault location top surface is bent
Line, figure (3b) are fault location bottom surface strain curve.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment：
Distributed sensing fiber is implanted in the specific position of electricity channel concrete structure, when electricity channel structure occurs
When deformation, internal distributed sensing fiber can cooperative transformation therewith, to the biography using distributed sensing fiber to strain
Feel characteristic, the strain value in each section of structure can be collected using distributive fiber optic strain analyzer, is dividing to obtain structure
The deformation state at the embedded place of cloth sensor fibre.Same section in comparison structure, the otherness between different location strain value obtain
Go out the section each point Strain Distribution situation, so as to accurately judge the electricity channel structural section happens is that sedimentation, grand
Rise or lateral deformation, and can assess it is such deformation caused by structure degree of impairment, crack accurate location and its size.
The general single mode distributed sensing fiber that the overcoating rubber that is prepared in advance is protected will in electricity channel construction period
Distributed sensing fiber binding is on longitudinal reinforcement, and pouring molding, is open in comb template, distributed sensing fiber is drawn
Enter in electricity channel active well, and electricity channel work is drawn out to geotextiles package or bellows nesting to protect in the construction time
Fibre-optical splice in well.
It is after the completion of calandria structure is built, the distributed sensing fiber in multiple embedment electricity channel structures is end to end,
Electricity channel fiber-optic monitoring net is formed after series connection, final access is by fibre strain analyzer, data process＆analysis equipment composition
Electricity channel malformation sensory perceptual system, to obtain in structure the situation of change of deformation and temperature, and by data storage or
Person is output in onsite user's terminal.
Electricity channel structure is uninterruptedly monitored, to obtain in each moment electricity channel structure along distributed sensing
The difference of the preliminary examination strain value of gained is electric power after the completion of the strain value of fiber arrangement position each point, the strain value and comb are built
The additional strain that comb is occurred in the operation phase.It can be calculated in comb segment distance along distributed sensing according to the strain measured
The deformation values of fiber arrangement position.It is position that comb deforms to measure there are the position of structure additional strain.
According to the top surface of same section arrangement, the difference of the strain value measured by bottom surface and side distributed sensing fiber,
Comb can be obtained according to beam line of deflection computational methods in the bending direction of the point, amount of deflection size, whether existing defects.According to coagulation
The size of native label and its maximum allowable tension and compression strain value and this additional strain value can determine whether calandria structure the point cracking
Situation.
Position of the distributed sensing fiber in comb is extremely important, and distributed sensing fiber is arranged in calandria structure
Four side of section four midpoints and four angle points, on the longitudinal reinforcement being arranged in structure along comb trend.Draw at its both ends
Enter end well and the reserved surplus capacity that can be crossed at end well length to next comb embedded light fibre.Optical fiber is kept in process of deployment
It moves towards parallel with comb, and keeps certain and stretching force.
(1) intelligent electric power calandria structure deformation perception net is constructed
As shown in Figure 1, in the longitudinally arranged four distributed biographies in four midpoints of electricity channel section four edges and angle point
Photosensitive fibre.Optical fiber is stretched when laying, is bound optical fiber on longitudinal reinforcement with band in the state of keeping certain pretightning force,
This is in order to enable optical fiber and structure cooperative transformation, to accurately measure the deformation of structure each point.Optical fiber both ends introduce
Active well, and casting concrete agent structure.It is after construction time that the optical fiber of multistage comb is end to end, form intelligent electric power
Comb deformation monitoring network, and incoming fiber optic strain analysis instrument.
Data collection and analysis
It is adopted according to the structural character and development of deformation situation reasonable set of each section of intelligent electric power comb in central server
The parameters such as sample frequency, spatial resolution, precision carry out continual data acquisition later, when local data variation is larger, carry
High sample frequency more accurately holds malformation state of development.
As shown in Fig. 2, data analysis process includes, show that structure deforms according to the spatial distribution data of structural strain
Fragment position, fault of construction position and crack generation position, and can differentiate the direction of structural bending deformation.
As best shown in figures 3 a and 3b, the difference of preliminary examination strain value when calculating strain value and completion structure that real-time sampling obtains,
Obtain structural strain value.The stress of structure, amount of deflection, Size of Crack are calculated according to the value.
Claims (1)
1. a kind of intelligent electric power comb DEFORMATION MONITORING SYSTEM, to perceive the shape of the electricity channel in electricity channel power transmission network
Become, which is characterized in that the system includes：
Distributed sensing fiber：It is arranged on the longitudinal reinforcement of the electricity channel between two electricity channel active wells, to pass
Inductive signal is passed and returns, the longitudinal reinforcement is equipped with a plurality of and is molded with electricity channel formed by integrally casting, is separately positioned on electricity
Midpoint between the apex angle and adjacent apex angle of power comb cross section, the distributed sensing fiber are arranged in same section of electric power
Pipe in be equipped with it is a plurality of, every distributed sensing fiber under tensile state it is parallel binding on corresponding longitudinal reinforcement, it is described
The both ends of electricity channel are equipped with opening, and every distributed sensing fiber stretches out opening and the sensor fibre of adjacent power comb connects
It connects, the connector of the distributed sensing fiber in the opening to electricity channel active well of the electricity channel passes through geotechnological cloth bag
It wraps up in or bellows is nested；
Strain acquirement instrument：It is connect with distributed sensing fiber, inductive signal is sent to distributed sensing fiber, and receive echo letter
Number, judge the deformation state of electricity channel；
Central server：It is communicated with strain acquirement instrument, generates frequency, range that instruction controlled strain Acquisition Instrument sends inductive signal
And precision, and receive and store the deformation state data of electricity channel；
Onsite user's terminal：It is communicated with central server by wireless network in Overhaul site, obtains the change shape of electricity channel
State data；
Using the detection method of intelligent electric power comb DEFORMATION MONITORING SYSTEM, include the following steps：
1) inductive signal of different sample frequencys, spatial resolution and precision is set according to different electricity channels；
2) the original inductive signal strain value that acquisition electricity channel complete working hour initially tests；
3) test inductive signal strain value when electricity channel work is obtained in real time；
If 4) existing difference is more than the threshold value set between original inductive signal strain value and test inductive signal strain value,
Judging this section of electricity channel, there are deformation or cracks, and carry out step 5)；
5) it according to the spatial distribution map of the echo of test inductive signal, obtains this section of electricity channel and deforms upon or the position in crack
And direction, according to the acquiring size deformation of difference or the size in crack.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105773235A (en) * | 2016-05-23 | 2016-07-20 | 安庆市峰邦工业产品设计有限公司 | Clamp clamping and releasing device for shaft part |
| CN106524936B (en) * | 2016-11-11 | 2018-12-11 | 青岛理工大学 | A kind of tunneltron canopy deformation monitoring method |
| CN110174142A (en) * | 2019-07-08 | 2019-08-27 | 广东电网有限责任公司 | A kind of embedded intelligence monitoring device of cable duct bank |
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| CN1175305A (en) * | 1994-12-16 | 1998-03-04 | 安全设备公司 | Method and device for continuous monitoring of dynamic loads |
| CN103207033A (en) * | 2013-04-22 | 2013-07-17 | 中国人民解放军国防科学技术大学 | Distributed fiber sensing method and device for simultaneously measuring temperature and strain |
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