CN203100943U - Telescopic type magnetic flux sensing and acquiring device - Google Patents
Telescopic type magnetic flux sensing and acquiring device Download PDFInfo
- Publication number
- CN203100943U CN203100943U CN 201220729408 CN201220729408U CN203100943U CN 203100943 U CN203100943 U CN 203100943U CN 201220729408 CN201220729408 CN 201220729408 CN 201220729408 U CN201220729408 U CN 201220729408U CN 203100943 U CN203100943 U CN 203100943U
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- flux sensing
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Abstract
The utility model discloses a telescopic type magnetic flux sensing and acquiring device, which comprises a cable and is characterized in that the cable is sleeved with a magnetic flux sensing unit. The magnetic flux sensing unit is connected with an acquisition unit through a signal line and the acquisition unit is connected with a computer through a signal line. Furthermore, the magnetic flux sensing unit comprises an excitation coil and an induction coil. The induction coil is positioned at the middle part on the inner side of the excitation coil. The magnetic flux sensing unit is also provided with a temperature sensor and a magnetic flux sensor. The temperature sensor and the magnetic flux sensor are connected with the acquisition unit through a signal line respectively. The telescopic type magnetic flux sensing and acquiring device has the advantages of quick test dynamic response, long service life and low price. Meanwhile, the measurement result of the device is free from being influenced by environmental factors, such as wind, vibration, anti-corrosion layers on the surfaces of steel cables and the like.
Description
Technical field
The utility model belongs to the Construction of Civil Engineering apparatus field, specifically, relates to a kind of telescopic magnetic flux sensing harvester.
Background technology
Cable now has been widely used in Longspan Bridge and fields such as heavy construction structure and hitching machinery owing to have outstanding advantages such as flexible big, that intensity is high and frequency is low.On-line monitoring cable stress is dynamically grasped the Changing Pattern of stress, is the important means that guarantees the wire rope assemblies safe operation.As the important indicator of wire rope assemblies health status assessment, the on-line monitoring of Suo Li is a world-class difficult problem of generally acknowledging, traditional pressure transducer and vibratory drilling method all have its intrinsic shortcoming, are difficult to satisfy the online detection requirements of cable stress.
The variation of Suo Li is to weigh the important symbol whether wire rope assemblies is in normal operational regime.Cable is a kind of inner high order hyperstatic structure, can make the linear and internal force of cable reach perfect condition by the Suo Li that adjusts drag-line.But, if actual Suo Li has departed from design Suo Li, this depart from not only can make produce unbalance loading between the cable, also can make Sarasota and girder produce parasitic moment.By on-line monitoring to the wirerope cable force, not only obtain the dynamic change trend of wirerope cable force, for the technology status of estimating cable generally provides foundation, can find to a certain extent also simultaneously whether the anchor system of drag-line, guard system be intact, whether cable wire corrosion etc. takes place, for the timely maintenance of cable provides objective basis.At present, 4 kinds of methods of the general employing of the cable force monitoring technology of cable both at home and abroad: (1) oil pressure gauge method of reading; (2) determination of pressure sensor method; (3) cable vibration frequency method; (4) cable strain measurement method.
There is following deficiency in above-mentioned traditional stretching mode:
At first be in operation, when drawing cable force, need in advance demarcate, set up the corresponding relation between oil pressure gauge reading and the jack tension power the hydraulic system of stretch-draw drag-line with oil pressure gauge method mensuration.The hydraulic pressure of lifting jack is the available hydraulic sensor determination also, and hydraulic pressure transducer is exported corresponding electric signal after experiencing hydraulic pressure, sends into can show pressure behind the receiving instrument or the back of converting directly shows stretching force.Because electric signal can transmit by lead, can take remote measurement, determine the size of stretch-draw cable force when using more convenient oil pressure gauge method of reading to be suitable for construction stage drag-line stretch-draw, have simple to operate, reading is directly perceived, and stretch-draw and cable force measurement combined, easy to adjust, but measuring accuracy is not high. but just improper for this method of the wire rope assemblies after building up, mainly be because installation and mobile stretch-draw lifting jack (particularly when the pulling force of drag-line needs use large-tonnage jack greatly) very bother.Cable vibration frequency method is subjected to the probabilistic restriction of cable boundary condition, often can not get ideal results.Cable strain measurement method needs to paste in advance, strain transducer is installed, and for resistance strain sensor, its long durability is relatively poor, for fiber Bragg grating strain sensor, a little less than sensor itself is highly brittle, destroys easily, is not easy to engineering and uses.
Next is that the greatest problem of employed resistance-type pressure-strain sensor in pressure transducer method and the strain measurement method is the bonding agent problem, its effect is that elastomeric distortion is delivered on the resistance sensitive grid of foil gauge accurately, the good and bad operating characteristic that directly influences foil gauge of its performance, as creep, mechanical hysteresis, insulation resistance, sensitivity, non-linear etc.And for a certain bonding agent, if its shear-stable intensity height, shrinkage factor will be big, and impact resistance is just poor; If good toughness, set time is just long.Thereby select particularly difficulty of all good cementing agent of every performance, and at high temperature bonding agent solidifies difficulty in addition, and paste operation is complicated again, and this has just restricted precision, the linearity and the usable range of resistance-type pressure-strain sensor.
In sum, above various reasons directly causes cable internal force not reach design and request for utilization, long term monitoring cable internal force difficulty, can not find in time that cable internal force changes, have a strong impact on the serviceable life and the security of large span cable load-bearing bridge, anchor lower prestress does not meet designing requirement and request for utilization, has a strong impact on the serviceable life of construction works such as bridge, increases the maintenance and the operation costs in construction work later stage.
The utility model content
The technical problems to be solved in the utility model is to overcome above-mentioned defective, provide a kind of have the test dynamic response fast, long service life, cheap, and the measurement result telescopic magnetic flux sensing harvester of the such environmental effects such as anticorrosive coat on wind-engaging, vibration and cable surface not.
For addressing the above problem, the technical scheme that the utility model adopted is:
Telescopic magnetic flux sensing harvester comprises cable, it is characterized in that: be socketed with the magnetic flux sensing device on the cable, the magnetic flux sensing device is connected with Acquisition Instrument by signal wire, and Acquisition Instrument is connected with computer by signal wire.
Say further:
Described magnetic flux sensing device comprises drive coil and inductive coil, and inductive coil is positioned at the middle inside position of drive coil; Be provided with temperature sensor and magnetic flux transducer in the described magnetic flux sensing device, temperature sensor is connected Acquisition Instrument with magnetic flux transducer by signal wire.
Further say:
Described drive coil and inductive coil are made up of enamel covered wire.
Further say:
The length of described inductive coil is 10cm, and the enamel covered wire line in the inductive coil directly is 0.17mm, and the coil number of plies is 4 layers; The length of drive coil is 50cm, and the enamel covered wire line in the drive coil directly is 0.47mm, and the coil number of plies is 3 layers.
Owing to adopted technique scheme, compared with prior art, the utility model comprises magnetic flux sensing device, Acquisition Instrument and computer.The magnetic flux sensing device mainly comprises drive coil and inductive coil, and temperature sensor and magnetic flux transducer.During work, utilize the work and the magnetic flux transducer of drive coil and inductive coil, the data of magnetic flux are passed to Acquisition Instrument by signal wire, Acquisition Instrument realizes that by computer Suo Li etc. detects and control again.It is fast to the utlity model has the test dynamic response, and long service life is cheap, and the measurement result such environmental effects such as anticorrosive coat on wind-engaging, vibration and cable surface not.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments simultaneously.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the utility model.
Among the figure: the 1-drive coil; The 2-inductive coil; The 3-cable; The 4-magnetic flux transducer; The 5-temperature sensor; The 6-signal wire; The 7-Acquisition Instrument; The 8-signal wire; The 9-computer.
Embodiment
Embodiment:
As shown in Figure 1, telescopic magnetic flux sensing harvester comprises cable 3, is socketed with the magnetic flux sensing device on the cable 3, and the magnetic flux sensing device is connected with Acquisition Instrument 7 by signal wire 6, and Acquisition Instrument 7 is connected with computer 9 by signal wire 8.
In the present embodiment, the magnetic flux sensing device comprises drive coil 1 and inductive coil 2, inductive coil 2 is positioned at the middle inside position of drive coil 1, be provided with temperature sensing 5 and magnetic flux transducer 4 in the magnetic flux sensing device, temperature sensor 5 is connected Acquisition Instrument 7 with magnetic flux transducer 4 by signal wire 6.In order to guarantee best detection effect, the length of inductive coil is 10cm, and the enamel covered wire line in the inductive coil directly is 0.17mm, and the coil number of plies is 4 layers; The length of drive coil is 50cm, and the enamel covered wire line in the drive coil directly is 0.47mm, and the coil number of plies is 3 layers.
During work, utilize the work and the magnetic flux transducer of drive coil and inductive coil, the data of magnetic flux are passed to Acquisition Instrument by signal wire, Acquisition Instrument realizes that by computer Suo Li etc. detects and control again.It is fast to the utlity model has the test dynamic response, and long service life is cheap, and the measurement result such environmental effects such as anticorrosive coat on wind-engaging, vibration and cable surface not.
The above only is a preferred implementation of the present utility model, and protection domain of the present utility model also not only is confined to the foregoing description, and all technical schemes that belongs under the utility model thinking all belong to protection domain of the present utility model.Should be pointed out that for those skilled in the art in the some improvements and modifications that do not break away under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. telescopic magnetic flux sensing harvester comprises cable, it is characterized in that: be socketed with the magnetic flux sensing device on the cable, the magnetic flux sensing device is connected with Acquisition Instrument by signal wire, and Acquisition Instrument is connected with computer by signal wire.
2. telescopic magnetic flux sensing harvester according to claim 1, it is characterized in that: described magnetic flux sensing device comprises drive coil and inductive coil, inductive coil is positioned at the middle inside position of drive coil; Be provided with temperature sensor and magnetic flux transducer in the described magnetic flux sensing device, temperature sensor is connected Acquisition Instrument with magnetic flux transducer by signal wire.
3. telescopic magnetic flux sensing harvester according to claim 2, it is characterized in that: described drive coil and inductive coil are made up of enamel covered wire.
4. telescopic magnetic flux sensing harvester according to claim 3, it is characterized in that: the length of described inductive coil is 10cm, and the enamel covered wire line in the inductive coil directly is 0.17mm, and the coil number of plies is 4 layers; The length of drive coil is 50cm, and the enamel covered wire line in the drive coil directly is 0.47mm, and the coil number of plies is 3 layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220729408 CN203100943U (en) | 2012-12-26 | 2012-12-26 | Telescopic type magnetic flux sensing and acquiring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220729408 CN203100943U (en) | 2012-12-26 | 2012-12-26 | Telescopic type magnetic flux sensing and acquiring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203100943U true CN203100943U (en) | 2013-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201220729408 Expired - Fee Related CN203100943U (en) | 2012-12-26 | 2012-12-26 | Telescopic type magnetic flux sensing and acquiring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203100943U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675721A (en) * | 2013-12-24 | 2014-03-26 | 江西飞尚科技有限公司 | Open-loop magnetic flux sensor |
| CN105527041A (en) * | 2016-01-31 | 2016-04-27 | 上海强劲地基工程股份有限公司 | Internal force monitoring and automatic measurement system of pre-stress anchor cable |
| CN107421670A (en) * | 2017-07-28 | 2017-12-01 | 浙江省交通规划设计研究院 | It is a kind of can inside long term monitoring stress of steel bunch prestress pipe bay assemblies and its construction method |
| CN108344531A (en) * | 2017-01-23 | 2018-07-31 | 中国科学院沈阳自动化研究所 | A kind of three-dimensional force transducer based on electromagnetic induction |
| CN109141688A (en) * | 2018-07-25 | 2019-01-04 | 付爱芝 | Bridge stress measurement system and its test method based on transformer model |
-
2012
- 2012-12-26 CN CN 201220729408 patent/CN203100943U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675721A (en) * | 2013-12-24 | 2014-03-26 | 江西飞尚科技有限公司 | Open-loop magnetic flux sensor |
| CN103675721B (en) * | 2013-12-24 | 2017-01-18 | 江西飞尚科技有限公司 | Open-loop magnetic flux sensor |
| CN105527041A (en) * | 2016-01-31 | 2016-04-27 | 上海强劲地基工程股份有限公司 | Internal force monitoring and automatic measurement system of pre-stress anchor cable |
| CN108344531A (en) * | 2017-01-23 | 2018-07-31 | 中国科学院沈阳自动化研究所 | A kind of three-dimensional force transducer based on electromagnetic induction |
| CN107421670A (en) * | 2017-07-28 | 2017-12-01 | 浙江省交通规划设计研究院 | It is a kind of can inside long term monitoring stress of steel bunch prestress pipe bay assemblies and its construction method |
| CN107421670B (en) * | 2017-07-28 | 2019-12-10 | 浙江省交通规划设计研究院 | Prestressed pipeline segment assembly capable of monitoring internal steel bundle stress for long time and construction method thereof |
| CN109141688A (en) * | 2018-07-25 | 2019-01-04 | 付爱芝 | Bridge stress measurement system and its test method based on transformer model |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20131226 |