CN205484168U - Bridge cable corrosion monitoring system based on piezoelectricity impedance method - Google Patents
Bridge cable corrosion monitoring system based on piezoelectricity impedance method Download PDFInfo
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- CN205484168U CN205484168U CN201620080407.4U CN201620080407U CN205484168U CN 205484168 U CN205484168 U CN 205484168U CN 201620080407 U CN201620080407 U CN 201620080407U CN 205484168 U CN205484168 U CN 205484168U
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Abstract
The utility model belongs to bridge cable corrosion monitoring field discloses a bridge cable corrosion monitoring system based on piezoelectricity impedance method, establish the piezoceramics film on bridge cable outer wall or terminal surface including pasting, connect in piezoceramics film's impedance analyzer to and connect in impedance analyzer's monitoring alarm device. The utility model discloses under the condition that does not influence cable actual stress state, through establishing piezoceramics film at cable outer wall or terminal surface subsides to the situation of change of impedance analyzer analysis cable impedance is used, the monitoring to the cable corrosion condition can be realized.
Description
Technical field
This utility model relates to bridge cable corrosion monitoring field, particularly relates to a kind of based on Piezoelectric Impedance method
Bridge cable corrosion monitoring system.
Background technology
Bridge cable corrosion be drag-line the most generally, the most serious damage type, drag-line Damage of Corroded and drag-line
Installation, load and safeguard procedures etc. are relevant.The detection method of drag-line corrosion at present mainly has:
(1) manual detection method: whether main inspection cable systems occurs whether corrosion, each securing member loosen
Deng, the method is intuitive and reliable, but detection range is limited, it is difficult to monitor sudden accident in time；
(2) ultrasonic detection method: mainly for detection of parallel steel wire or steel wire face crack, rust hole,
But the drag-line corrosion being difficult to pair cross-section complex-shaped is accurately positioned, and ultrasound wave is only capable of carrying out Surface testing,
There is bigger check frequency.
(3) lonizing radiation detection method: drag-line internal injury and defect can be detected, but x-ray apparatus is the biggest,
The monitoring of inapplicable large scale structure.
(4) acoustic emission method: be mainly used in the monitoring of fracture of wire in drag-line, but signal attenuation is big, also uncomfortable
Monitoring for large scale structure.
(5) leakage field method: be applicable to drag-line free segment and corrode and fracture of wire, but inefficiency, accuracy of detection
Sensitivity is the highest.
(6) electrochemical method: mainly for single steel bar or steel strand wires, many parallel steel wires or steel are twisted
The cable inspection less effective of line composition, is affected significantly by regional environment factor such as temperature, temperature.
(7) the optical fiber grid monitoring method expanded based on corrosion: based on reinforcing bar by erosion mechanism of intumescence, it is to avoid dry
Disturb corrosion interface, but the optical fiber of ventilative glue-line and winding substantially have impact on the intrusion of ion, with true corrosion
There is difference in environment, and expansion is limited by concrete extrusion, and its susceptiveness and effectiveness wait engineering detecting.
(8) detection method concentrated based on plane stress state stress: the method is caused because of corrosion by detection
Stress mutation judge corrosion degree, rusting rate and corrosion crack depth, owing to fiber plant cost is high,
Constraining being widely used of the method, processing, installation accuracy are required higher by the method simultaneously, are also unfavorable for
Its popularization and application.
Utility model content
The purpose of this utility model is to provide a kind of bridge cable of based on Piezoelectric Impedance method corrosion monitoring system
System, under conditions of not affecting drag-line actual forced status, by drag-line outer wall or end face be sticked piezoelectricity make pottery
Porcelain thin film, and apply electric impedance analyzer to analyze the situation of change of drag-line impedance, realize drag-line corrosion feelings with this
The monitoring of condition.
For reaching this purpose, this utility model by the following technical solutions:
A kind of bridge cable corrosion monitoring system based on Piezoelectric Impedance method, including being sticked at bridge cable outer wall
Or the piezoceramics film on end face, it is connected to the electric impedance analyzer of described piezoceramics film, and connects
Monitoring alarm in electric impedance analyzer.
As preferably, described electric impedance analyzer is connected to piezoceramics film by signal-transmitting cable, to pressure
Electroceramics thin film accepts the impedance signal of piezoceramics film feedback while sending sweep voltage signal.
As preferably, when described piezoceramics film is sticked on the outer wall of bridge cable, described piezoelectric ceramics
Film outside is provided with protection steel bushing.
As preferably, described piezoceramics film is fixed on bridge cable outer wall or end face by AB glue.
As preferably, described piezoceramics film surface-coated has waterproof layer.
As preferably, described waterproof layer material is silica gel.
The beneficial effects of the utility model: be sticked piezoceramics film at drag-line outer wall or end face, and by resistance
Analysis resistant instrument sends sweep voltage signal to piezoceramics film, and records the resistance of piezoceramics film feedback
Anti-value.When constantly there is corrosion along with drag-line, the resistance value of electric impedance analyzer record can produce corresponding change,
It is capable of the monitoring to drag-line corrosion situation according to this change.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model monitoring system；
Fig. 2 is the logical structure schematic diagram of this utility model monitoring system；
Fig. 3 is that the piezoceramics film of this utility model monitoring system is positioned at the structural representation of drag-line outer wall；
Fig. 4 is that the piezoceramics film of this utility model monitoring system is positioned at the structural representation of drag-line end face；
Fig. 5 is the flow chart of this utility model monitoring method.
In figure:
1, bridge cable；2, piezoceramics film；3, electric impedance analyzer；4, monitoring alarm.
Detailed description of the invention
Further illustrate the technical solution of the utility model below in conjunction with the accompanying drawings and by detailed description of the invention.
Embodiment 1:
This utility model provides a kind of bridge cable corrosion monitoring system based on Piezoelectric Impedance method, and it uses pressure
The long term monitoring that bridge cable surface corrosion is changed by electrical impedance method, concrete, as Figure 1-4, this prison
Examining system includes the piezoceramics film 2 being sticked on bridge cable 1 outer wall or end face, is connected to piezoelectric ceramics
The electric impedance analyzer 3 of thin film 2, and it is connected to the monitoring alarm 4 of electric impedance analyzer 3, wherein:
Piezoceramics film 2 can be fixed on (Fig. 3 on the outer wall of bridge cable 1 or end face by AB glue
And shown in Fig. 4), specifically it is pasted onto which position of bridge cable 1, can be arranged as required to.Above-mentioned pressure
Electroceramics thin film 2, when being pasted onto on bridge cable 1, can be prevented in this piezoceramics film 2 surface-coated
Water layer carries out water-proofing treatment, it is preferred that in the present embodiment, waterproof layer uses silica gel, i.e. at Thin Piezoelectric
Film 2 surface-coated silica gel carries out waterproof.It is of course also possible to be other waterproof materials, such as epoxy resin material
Material etc., specifically can select according to actual needs.
When piezoceramics film 2 is sticked on the outer wall of bridge cable 1, outside this piezoceramics film 2
Being provided with protection steel bushing (not shown), this protection steel bushing is prevented from bridge cable 1 vibration processes damaging
Piezoceramics film 2.When piezoceramics film 2 is sticked on the end face of bridge cable 1, then alternative
Protection steel bushing is set.
Above-mentioned electric impedance analyzer 3 is connected to piezoceramics film 2 by signal-transmitting cable, to Thin Piezoelectric
Film 2 sends sweep voltage signal, and accepts the impedance signal that piezoceramics film 2 feeds back simultaneously, and it will pressure
The impedance signal of electroceramics thin film 2 feedback is converted into resistance value, and is sent to monitoring alarm 4.
After above-mentioned monitoring alarm 4 receives the resistance value that electric impedance analyzer 3 sends, according to setting
The corresponding relation of resistance value and bridge cable 1 corrosion situation, the rust of the bridge cable 1 of monitoring can be learnt
Erosion situation.And preferably, above-mentioned monitoring alarm 4 also has warning function, specifically will receive
Electric impedance analyzer 3 send resistance value compare with default resistance value, exceed default impedance at resistance value
During value, monitoring alarm 4 is reported to the police, and prompting monitoring personnel's bridge cable 1 corrosion is serious, needs to repair
Reason.
Embodiment 2:
Bridge cable corrosion monitoring system based on Piezoelectric Impedance method based on embodiment 1, this utility model is also
A kind of bridge cable corrosion monitoring method based on Piezoelectric Impedance method is provided, as it is shown in figure 5, this monitoring method
Comprise the following steps:
S100: be sticked on bridge cable 1 piezoceramics film 2；
I.e. be sticked on the position to be pasted of bridge cable 1 piezoceramics film 2, and this position to be pasted is bridge cable
The upper surface of 1 or certain of end face；Concrete, when being sticked piezoceramics film 2, first draw at bridge
AB glue (other glue can also be selected) is smeared at the position to be pasted of rope 1 and piezoceramics film 2, will pressure
Electroceramics thin film 2 is pasted onto on the position to be pasted of bridge cable 1, and applies certain pressure solidification Preset Time,
Completing the process that is sticked of piezoceramics film 2, in the present embodiment, above-mentioned Preset Time is preferably 24 hours.
S110: electric impedance analyzer 3 periodic transmission sweep voltage signal, to piezoceramics film 2, receives simultaneously
The impedance signal of piezoceramics film 2 feedback, and impedance signal is converted into resistance value；
Concrete, first welding signal transmission cable on piezoceramics film 2, and transmitted by this signal
Cable connects electric impedance analyzer 3, and this electric impedance analyzer 3 can periodically be launched sweep voltage signal and make pottery to piezoelectricity
Porcelain thin film 2, and the real-time impedance signal receiving piezoceramics film 2 feedback, and impedance signal is converted into
Resistance value.
Above-mentioned electric impedance analyzer 3 periodic transmission sweep voltage signal refers to bridge to piezoceramics film 2
When beam drag-line 1 carries out on-line monitoring, can interval time sent sweep voltage signal also by electric impedance analyzer 3
Recording resistance value, this interval time can regulate in real time according to the running status of bridge and bridge cable.
S120: monitoring alarm 4 receives the resistance value that electric impedance analyzer 3 sends, by resistance value with default
Resistance value compares, and judges bridge cable corrosion state according to comparative result.
After i.e. monitoring alarm 4 receives the resistance value that electric impedance analyzer 3 sends, by this resistance value with default
Resistance value compares, and judges the corrosion state of bridge cable 1 according to comparative result.Concrete, above-mentioned
Preset resistance value to there being the corrosion state of a bridge cable 1, when the impedance that monitoring alarm 4 receives
When value is less than this default resistance value, it is appreciated that the corrosion state of the bridge cable 1 that this resistance value is corresponding is better than
Preset the corrosion state of bridge cable 1 corresponding to resistance value；The resistance value received when monitoring alarm 4 is high
When this default resistance value, it is appreciated that the corrosion state of the bridge cable 1 that this resistance value is corresponding is worse than default
The corrosion state of the bridge cable 1 that resistance value is corresponding.
In this step, it is preferred that when the resistance value that monitoring alarm 4 receives exceedes default resistance value,
Monitoring alarm 4 can carry out corrosion warning, and prompting monitoring personnel's bridge cable 1 corrosion is excessively serious,
Needs place under repair.
In the present embodiment, it is also possible to pre-set resistance value and bridge cable 1 by this monitoring alarm 4
The corresponding relation of corrosion situation, may directly learn that corresponding to the resistance value received according to this corresponding relation
Bridge cable 1 corrosion state.
Before step S100, this method also includes:
Upper surface or end face at bridge cable 1 choose position to be pasted, and this position to be pasted is for pasting above-mentioned pressure
Electroceramics thin film 2；
Is polished in this position to be pasted subsequently, and after polishing smooth, by anhydrous alcohol by this position to be pasted
Put and clean up.
In the present embodiment, it is pasted onto bridge cable 1 at piezoceramics film 2 and is connected with electric impedance analyzer 3
After, also include, to piezoceramics film 2 surface-coated waterproof layer, carrying out water-proofing treatment, concrete waterproof layer
Material illustrated, the present embodiment repeats no more.
Obviously, above-described embodiment of the present utility model is only used to understand the act that explanation this utility model is made
Example, and it is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field
For, can also make other changes in different forms on the basis of the above description.Here without
Also cannot all of embodiment be given exhaustive.All made within spirit of the present utility model and principle
Any amendment, equivalent and improvement etc., should be included in this utility model scope of the claims it
In.
Claims (6)
1. a bridge cable corrosion monitoring system based on Piezoelectric Impedance method, it is characterised in that include being sticked
Piezoceramics film (2) on bridge cable (1) outer wall or end face, is connected to described piezoceramics film
(2) electric impedance analyzer (3), and it is connected to the monitoring alarm (4) of electric impedance analyzer (3).
Bridge cable corrosion monitoring system the most according to claim 1, it is characterised in that described impedance
Analyser (3) is connected to piezoceramics film (2) by signal-transmitting cable, to piezoceramics film (2)
Accept, while sending sweep voltage signal, the impedance signal that piezoceramics film (2) feeds back.
Bridge cable corrosion monitoring system the most according to claim 1, it is characterised in that described piezoelectricity
When ceramic membrane (2) is sticked on the outer wall of bridge cable (1), described piezoceramics film (2) outside
It is provided with protection steel bushing.
Bridge cable corrosion monitoring system the most according to claim 1, it is characterised in that described piezoelectricity
Ceramic membrane (2) is fixed on bridge cable (1) outer wall or end face by AB glue.
Bridge cable corrosion monitoring system the most according to claim 4, it is characterised in that described piezoelectricity
Ceramic membrane (2) surface-coated has waterproof layer.
Bridge cable corrosion monitoring system the most according to claim 5, it is characterised in that described waterproof
Layer material is silica gel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620080407.4U CN205484168U (en) | 2016-01-27 | 2016-01-27 | Bridge cable corrosion monitoring system based on piezoelectricity impedance method |
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| CN201620080407.4U CN205484168U (en) | 2016-01-27 | 2016-01-27 | Bridge cable corrosion monitoring system based on piezoelectricity impedance method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548271A (en) * | 2016-01-27 | 2016-05-04 | 江苏三川智能科技有限公司 | Bridge beam inhaul cable corrosion monitoring system and method based on piezoelectric impedance method |
| CN107389740A (en) * | 2017-08-03 | 2017-11-24 | 上海发电设备成套设计研究院有限责任公司 | A kind of on-line monitoring system of heating surface fume side wear extent and etching extent |
-
2016
- 2016-01-27 CN CN201620080407.4U patent/CN205484168U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548271A (en) * | 2016-01-27 | 2016-05-04 | 江苏三川智能科技有限公司 | Bridge beam inhaul cable corrosion monitoring system and method based on piezoelectric impedance method |
| CN107389740A (en) * | 2017-08-03 | 2017-11-24 | 上海发电设备成套设计研究院有限责任公司 | A kind of on-line monitoring system of heating surface fume side wear extent and etching extent |
| CN107389740B (en) * | 2017-08-03 | 2023-08-29 | 上海发电设备成套设计研究院有限责任公司 | Online monitoring system for abrasion loss and corrosion loss of flue gas side of heating surface |
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