CN205374707U - Differential type temperature compensating type bridge cable magnetic flux collection system - Google Patents
Differential type temperature compensating type bridge cable magnetic flux collection system Download PDFInfo
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- CN205374707U CN205374707U CN201521132344.4U CN201521132344U CN205374707U CN 205374707 U CN205374707 U CN 205374707U CN 201521132344 U CN201521132344 U CN 201521132344U CN 205374707 U CN205374707 U CN 205374707U
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- circuit
- iron core
- magnetic circuit
- induction coil
- bridge rope
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Abstract
The utility model provides a differential type temperature compensating type bridge cable magnetic flux collection system, including sensor, acquisition circuit and difference arithmetic unit, wherein, the sensor comprises work magnetic circuit and reference magnetic circuit, and the work magnetic circuit includes service bridge cable, first iron core, second iron core, first yoke, an induction coil, with an exciting coil on the second iron core, refers to the magnetic circuit including reference steel cable cable, third iron core, fourth iron core, second yoke, the 2nd induction coil and the 2nd exciting coil, acquisition circuit includes high -pressure pump circuit, total mark regulating circuit, low pass filter circuit, sample hold circuit and difference arithmetic unit, and the output of high -pressure pump circuit is connected with change over switch, and high -pressure pump circuit encourages the collection to reference magnetic circuit, work magnetic circuit respectively through change over switch. The utility model discloses to different bridge cables in the time of can saving magnetic flux and gather, or the material is the same but bridge cable that the cross -section is different need carry out the process of temperature calibration again when measuring, but has commonality and replaceability, has reduced the maintenance cost of device.
Description
Technical field
This utility model belongs to structure health monitoring apparatus field, is specifically related to a kind of differential type temperature compensating type bridge rope magnetic flux harvester.
Background technology
Bridge rope is ferromagnetic material, it is placed in magnetic field environment, bridge rope will be magnetized, when the stress of bridge rope changes, B-H loop will change therewith, and pcrmeability also will change, it is possible to utilizes the miniature precision electromagnetic transducer being placed in bridge rope, gather and measure the change of pcrmeability, it is possible to extrapolate the STRESS VARIATION of bridge rope.
The intensity of magnetization of ferromagnetic material is affected very big by temperature, and the rule of impact and theory are very complicated, and when therefore temperature is on bridge rope stress determination, the compensation of impact just becomes comparatively crucial part.
Many employings is temperature curve penalty method at present, and its basic ideas are: at laboratory, every kind of need is surveyed bridge rope and magnetizes, when not being subject to External Force Acting or External Force Acting constant, and the relation curve that the test intensity of magnetization or pcrmeability or susceptibility vary with temperature；Meanwhile, in carrying out cable tension test process, it is necessary to the temperature of tested steel cable, the temperature curve of pcrmeability is then utilized to compensate, thus reducing or eliminating the temperature impact on measurement result.The advantage of this type of temperature curve penalty method is directly perceived, do not need to increase extra structure, but it is due to the relation curve between the pcrmeability of every kind of ferromagnetic material and temperature, relevant with many factors such as the composition of material, the lattice arrangement of magnetic domain, face shaping, the size of cross-sectional area, magnetic field intensities.So, to different materials, even if or same material but different outward appearance or long-pending being required for of varying cross-section carry out temperature impact experiment respectively, just can obtain the relation curve between corresponding pcrmeability and temperature.But this type of temperature curve penalty method workload is relatively big, and experimental period is longer, cost is high and replaceability extreme difference, seems particularly difficult in the process that equipment carries out regular maintenance or replacing.
Utility model content
To be solved in the utility model be above-mentioned in technical problem, it is provided that a kind of can quickly draw the differential type temperature compensating type bridge rope magnetic flux harvester that need to survey bridge rope temperature compensation curve.
The technical scheme that this utility model adopts is:
A kind of differential type temperature compensating type bridge rope magnetic flux harvester, including sensor, Acquisition Circuit and difference arithmetic unit, it is characterised in that described sensor is made up of work magnetic circuit and reference magnetic circuit；
Described work magnetic circuit includes service bridge rope, the first iron core, the second iron core and the first yoke, first iron core is provided with the first induction coil, being provided with the first excitation coil on second iron core, described service bridge rope is inserted in the first induction coil and the first excitation coil respectively；
Described reference magnetic circuit includes reference steel cable, the 3rd iron core, the 4th iron core and the second yoke, reference steel cable is all identical with the material of above-mentioned service bridge rope, Each part and cross section, 3rd iron core is provided with the second induction coil, being provided with the second excitation coil on 4th iron core, described reference steel cable is inserted in the second induction coil and the second excitation coil respectively；
Described Acquisition Circuit includes high pressure activation circuit, integral adjustment circuit, low-pass filter circuit, sampling hold circuit and difference arithmetic unit, the outfan of high pressure activation circuit is connected to switching switch, and reference magnetic circuit, work magnetic circuit are carried out excitation gather by switching switch by high pressure activation circuit successively；The induced signal of described reference magnetic circuit, after switching switch, enters difference arithmetic unit successively after first integral regulates circuit and sampling hold circuit carries out signal condition and signal maintenance；The induced signal of described work magnetic circuit, after switching switch, enters difference arithmetic unit successively after second integral regulates circuit and low-pass filter circuit carries out signal condition and Filtering Processing.
Described first induction coil and the first excitation coil and have the second induction coil and the second excitation coil respectively to share iron core, i.e. described first iron core and the second iron core and the 3rd iron core and the respectively interconnected integral type iron core of the 4th iron core.
Described first iron core, the second iron core, the 3rd iron core and the 4th iron core all adopt ingot iron or the A3 mild steel of high permeability.
The yoke of described work magnetic circuit and reference magnetic circuit is respectively one-body molded with iron core, and the induced signal of described work magnetic circuit and reference magnetic circuit is for being sequentially output.
Differential type temperature compensating type bridge rope magnetic flux harvester of the present utility model, by adopting differential type technique for temperature compensation, eliminate when magnetic flux gathers for different bridge ropes, or material is identical but bridge rope that cross section is different need to re-start the process of temperature calibration when measuring, make this device have versatility and replaceability, be greatly reduced the maintenance cost of device.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model；
Fig. 2 is the structural representation of sensor in this utility model.
Illustrate: 1-sensor, 2-work magnetic circuit, 3-reference magnetic circuit, 4-high pressure activation circuit, 5-switching switch, 6-first integral regulate circuit, 7-second integral regulates circuit, 8-low-pass filter circuit, 9-sampling hold circuit, 10-difference arithmetic unit, 11-service bridge rope, 12-the first induction coil, 13-the first excitation coil, 14-reference steel cable, 15-the second induction coil, 16-the second excitation coil.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described.
Differential type temperature compensating type bridge rope magnetic flux harvester as depicted, including sensor (1), Acquisition Circuit and difference arithmetic unit (10), sensor (1) is made up of work magnetic circuit (2) and reference magnetic circuit (3).Work magnetic circuit (2) includes service bridge rope (11), the first iron core, the second iron core and the first yoke, first iron core is provided with the first induction coil (12), being provided with the first excitation coil (13) on second iron core, described service bridge rope (11) is inserted in the first induction coil (12) and the first excitation coil (13) respectively；
Described reference magnetic circuit (3) includes reference steel cable (14), the 3rd iron core, the 4th iron core and the second yoke, reference steel cable (14) is all identical with the material of above-mentioned service bridge rope (11), Each part and cross section, 3rd iron core is provided with the second induction coil (15), being provided with the second excitation coil (16) on 4th iron core, described reference steel cable (14) is inserted in the second induction coil (15) and the second excitation coil (16) respectively.The excitation coil of reference magnetic circuit (3), induction coil parameter are all completely the same with the parameter of the excitation coil of work magnetic circuit (2), induction coil；What each iron core adopted is the A3 mild steel of high permeability, and the first iron core and the second iron core and the 3rd iron core and the respectively interconnected integral type iron core of the 4th iron core.Above-mentioned middle reference steel cable (14) does not stress in the process of real work, namely not by the pulling force of any normal direction, it is only limited by the variations in temperature identical with service bridge rope (11), and service bridge rope (11) is in practical work process, bear the change of external force and temperature simultaneously.
Acquisition Circuit includes high pressure activation circuit (4), integral adjustment circuit, low-pass filter circuit (8), sampling hold circuit (9) and difference arithmetic unit (10), the outfan of high pressure activation circuit (4) is connected to switching switch (5), reference magnetic circuit (3), work magnetic circuit (2) are carried out excitation gather by switching switch (5) by high pressure activation circuit (4) respectively, if avoid gathering and magnetic fields to work magnetic circuit (2) and reference magnetic circuit (3) simultaneously, cause the signal of collection that error occurs.
Reference steel cable (14) does not stress in the process of real work, namely not by the pulling force of any normal direction, it is only limited by the variations in temperature identical with service bridge rope (11), and service bridge rope (11) is in practical work process, bears the change of external force and temperature simultaneously.When Acquisition Circuit energising starts, reference magnetic circuit (3) is made first to be made induced signal export by high pressure activation circuit (4) excitation by switching switch (5), the induced signal of reference magnetic circuit (3) is after switching switch (5), regulate circuit (6) through first integral successively and carry out signal condition, now for make follow-up work magnetic circuit (2) induced signal finally to export in the lump, simultaneously not on also each place magnetic circuit generation impact, to obtain signal difference more accurately, induced signal leaves first integral adjustment circuit (6) and enters sampling hold circuit (9) afterwards, by sampling hold circuit (9), the induced signal of reference magnetic circuit (3) is accurately kept, until after export to difference arithmetic unit (10)；Then, switching switch (5) carries out pumping signal switching, making work magnetic circuit (2) be made induced signal export by high pressure activation circuit (4) excitation, the induced signal of generation enters difference arithmetic unit (10) successively after second integral regulates circuit (7) and low-pass filter circuit (8) carries out signal condition and Filtering Processing；While the induced signal that work magnetic circuit (2) produces enters difference arithmetic unit (10), the induced signal that reference magnetic circuit (3) keeps in sampling hold circuit (9) is in now also entering in difference arithmetic unit (10), then the induced signal of the two output is carried out calculus of differences by difference arithmetic unit (10), deduct the voltage signal difference that service bridge rope (11) temperature influence causes, just can eliminate the impact that magnetic flux is gathered by temperature.
The above only have expressed preferred implementation of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to this utility model the scope of the claims.It should be pointed out that, for the person of ordinary skill of the art, without departing from the concept of the premise utility, it is also possible to make some deformation, improvement and replacement, these broadly fall into protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be as the criterion with claims.
Claims (4)
1. a differential type temperature compensating type bridge rope magnetic flux harvester, including sensor, Acquisition Circuit and difference arithmetic unit, it is characterised in that described sensor is made up of work magnetic circuit and reference magnetic circuit；
Described work magnetic circuit includes service bridge rope, the first iron core, the second iron core and the first yoke, first iron core is provided with the first induction coil, being provided with the first excitation coil on second iron core, described service bridge rope is inserted in the first induction coil and the first excitation coil respectively；
Described reference magnetic circuit includes reference steel cable, the 3rd iron core, the 4th iron core and the second yoke, reference steel cable is all identical with the material of above-mentioned service bridge rope, Each part and cross section, 3rd iron core is provided with the second induction coil, being provided with the second excitation coil on 4th iron core, described reference steel cable is inserted in the second induction coil and the second excitation coil respectively；
Described Acquisition Circuit includes high pressure activation circuit, integral adjustment circuit, low-pass filter circuit, sampling hold circuit and difference arithmetic unit, the outfan of high pressure activation circuit is connected to switching switch, and reference magnetic circuit, work magnetic circuit are carried out excitation gather by switching switch by high pressure activation circuit successively；The induced signal of described reference magnetic circuit, after switching switch, enters difference arithmetic unit successively after first integral regulates circuit and sampling hold circuit carries out signal condition and signal maintenance；The induced signal of described work magnetic circuit, after switching switch, enters difference arithmetic unit successively after second integral regulates circuit and low-pass filter circuit carries out signal condition and Filtering Processing.
2. a kind of differential type temperature compensating type bridge rope magnetic flux harvester according to claim 1, it is characterised in that: described first induction coil and the first excitation coil and have the second induction coil and the second excitation coil respectively shared iron core.
3. a kind of differential type temperature compensating type bridge rope magnetic flux harvester according to claim 1, it is characterised in that: described first iron core, the second iron core, the 3rd iron core and the 4th iron core all adopt ingot iron or the A3 mild steel of high permeability.
4. a kind of differential type temperature compensating type bridge rope magnetic flux harvester according to claim 1, it is characterised in that: the yoke of described work magnetic circuit and reference magnetic circuit is respectively one-body molded with iron core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521132344.4U CN205374707U (en) | 2015-12-30 | 2015-12-30 | Differential type temperature compensating type bridge cable magnetic flux collection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521132344.4U CN205374707U (en) | 2015-12-30 | 2015-12-30 | Differential type temperature compensating type bridge cable magnetic flux collection system |
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| Publication Number | Publication Date |
|---|---|
| CN205374707U true CN205374707U (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521132344.4U Expired - Fee Related CN205374707U (en) | 2015-12-30 | 2015-12-30 | Differential type temperature compensating type bridge cable magnetic flux collection system |
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| CN (1) | CN205374707U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467336A (en) * | 2015-12-30 | 2016-04-06 | 中交路桥技术有限公司 | Differential temperature compensation type bridge cable magnetic flux acquisition device |
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2015
- 2015-12-30 CN CN201521132344.4U patent/CN205374707U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467336A (en) * | 2015-12-30 | 2016-04-06 | 中交路桥技术有限公司 | Differential temperature compensation type bridge cable magnetic flux acquisition device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20181230 |