CN111830445A - Flexible magnetic flux sensor and manufacturing and mounting method thereof - Google Patents
Flexible magnetic flux sensor and manufacturing and mounting method thereof Download PDFInfo
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- CN111830445A CN111830445A CN202010723302.7A CN202010723302A CN111830445A CN 111830445 A CN111830445 A CN 111830445A CN 202010723302 A CN202010723302 A CN 202010723302A CN 111830445 A CN111830445 A CN 111830445A
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- 238000000429 assembly Methods 0.000 claims abstract description 9
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- 239000011241 protective layer Substances 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 31
- 238000007493 shaping process Methods 0.000 claims description 15
- 230000005284 excitation Effects 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0052—Manufacturing aspects; Manufacturing of single devices, i.e. of semiconductor magnetic sensor chips
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/007—Environmental aspects, e.g. temperature variations, radiation, stray fields
- G01R33/0082—Compensation, e.g. compensating for temperature changes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
Abstract
The invention discloses a flexible magnetic flux sensor and a manufacturing and mounting method thereof, which are used for detecting the tension of an exposed steel cable in the existing structure. The coil in the sensor is manufactured by using the data line manufacturing technology in a computer CD-ROM drive and a hard disk, the metal wires are arranged in the plastic protective layer side by side, and the two ends of the metal wires are provided with corresponding plug connectors. After the plug connectors at the two ends are connected, a flexible coil assembly is formed. When the device is installed on site, the exciting coil and the induction coil can both be composed of multiple layers of flexible coil assemblies, and the flexible coil assemblies are connected by leads. The device can be used for long-term measurement, and is more suitable for sequentially measuring the tensile force of the steel cable in the structure on site. The invention simplifies the field installation, saves the time, realizes the modularization and is convenient for disassembly and assembly.
Description
Technical Field
The present invention relates to a magnetic flux sensor for measuring a cable force in a structure and a method of manufacturing and installing the same, and more particularly, to a flexible magnetic flux sensor and a method of manufacturing and installing the same.
Background
In recent decades, with the application of cable structures becoming more and more extensive, the design and calculation theory of suspension cable structures has been perfected and developed. The control of cable force in the construction process and the existing structure is an important link related to the internal force and state of the structure. Deterioration of the structural material, defects, or structural damage caused by accidents can cause redistribution of internal forces of the components, particularly the cable. Therefore, how to determine the cable tension of the structure during construction and use becomes a significant problem for engineering designers.
Common cable force testing methods are the pressure sensor method and the frequency method. The pressure sensor is high in short-term accuracy and good in dynamic property, but needs to be connected in series in a stressed structure, the problems of material creep, deformation transmission distortion, zero drift and the like can occur under the long-term action of load, the durability and the long-term accuracy are not easy to guarantee, and the pressure sensor cannot be recalibrated and replaced under the stressed state, so that the pressure sensor has certain limitation when being used for long-term monitoring. The frequency method is used for testing the cable force, a vibration curve of the cable is required to be tested, and the frequency spectrum analysis is carried out to obtain the fundamental frequency or the frequency difference of the vibration frequency of the cable. Because the actual anchoring conditions of the end part of the inhaul cable are more complex than those of various corresponding theoretical models, cable force formulas obtained based on various theoretical models are different, and errors exist theoretically.
In the last decade, magnetic flux sensors have been developed and applied to testing cable force with their excellent performance. Its advantages mainly include: the inhaul cable is not damaged; the sensor has low maintenance cost and long service life; the anti-interference capability is strong, the measurement precision is high, and the repeatability is good; the system can automatically measure and compensate the temperature; can be connected with a computer system for remote health monitoring. Its application is mainly divided into two cases. For the structure to be built or the inhaul cable to be replaced and installed, an integrated magnetic flux sensor can be adopted, the sensor has the similar defects of a pressure type sensor, the sensor is installed at one time, the precision is continuously reduced along with the lapse of the service time, the replacement is inconvenient, and the maintenance cannot be caused. The other form is that aiming at the guy cable in the built structure, the magnetic flux sensor can be manufactured on site, at the moment, each cylinder body corresponding to the integrated magnetic flux sensor is divided into two cylinder pieces, the corresponding cylinder pieces are combined from inside to outside on site, corresponding lead wires are wound on site, and the magnetic flux sensor is manufactured on site. Such field-fabricated magnetic flux sensors still have a disadvantage of being time-consuming to fabricate for each cable whose cable force is to be measured. Generally, the sensor remains on the structure after testing, and although the sensor can be removed, the wires are damaged during the removal process, and the operation is troublesome.
At present, a half-type or half-type magnetic flux sensor is also available, but the sensor is complex to manufacture, large in size, heavy in weight and inconvenient to carry.
Therefore, there is a need in the art for a modular, standardized, serialized magnetic flux sensor with various components that can be quickly installed and removed on site, and that requires the modules to be lightweight and simple to operate.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a flexible magnetic flux sensor and a manufacturing and mounting method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a flexible magnetic flux sensor is used for measuring internal force in a guy cable and comprises an excitation coil and a component for measuring the intensity of magnetic field, wherein the excitation coil is internally provided with a flexible coil component; the flexible coil component is manufactured by adopting a data line manufacturing technology for connecting an optical drive and a hard disk in a computer, and comprises a flexible line belt and connectors at two ends; the flexible line belt is provided with leads which are arranged in the flexible electric insulation protective layer side by side; in the flexible coil component, two ends of the flexible line belt are provided with corresponding connectors, and the wires in the flexible line belt are sequentially connected in series after being spliced.
A method for manufacturing and installing a flexible magnetic flux sensor mainly comprises the following steps:
and 4, step 4: an assembly for measuring the magnetic field strength is installed.
Preferably, the conducting wire is a copper wire, and the copper wire consists of a single copper wire or a plurality of copper wires.
Preferably, the connector is the same as the IDE data line jack terminal in one type, and is called a jack connector; the other type of connector is provided with corresponding contact pins and is called a contact pin connector, a contact pin clamping plate with contact pins is arranged in the connector, and the contact pin clamping plate is contacted with the conducting wires in the flexible line band; correspondingly, what is referred to as a receptacle card within the receptacle connector; the pin clamping plate is different from the jack clamping plate in that a pin is used; the contact pin is formed by rolling a plate section at the corresponding end, and the middle part of the plate section is connected with the other section.
Preferably, the component for measuring the magnetic field intensity is an induction coil.
Preferably, the flexible magnetic flux sensor comprises a temperature sensor.
Preferably, the shaping body is an air bag with two air pipes or a thin plate made of soft rubber.
Preferably, a step of adding a step of,
and 5: and a layer of aluminum foil is wrapped on the outer surface of the exciting coil.
Preferably, the induction coil and the exciting coil are the same in structure and manufacturing and mounting methods.
Preferably, after the manufacturing and mounting method, a step is added,
step 6: and a layer of aluminum foil is wrapped on the outer surface of the induction coil.
The flexible cable band in the scheme can adopt the SATA data cable connected with the hard disk of the computer, can realize more times of plugging and unplugging and is not easy to damage.
The magnetic flux sensor in the scheme can be used without a temperature sensor, and the temperature sensor carried with the user is used for measuring the temperature during measurement. Since the magnetic permeability of steel varies with temperature, the temperature influence can be eliminated by temperature compensation.
The component for measuring the magnetic field intensity in the scheme can also adopt a magnetoelectric sensing element. The magnetoelectric sensing element can be made of a magnetoelectric single-phase material, a magnetoelectric composite material, a magnetoelectric laminated material, a Hall element and the like, does not need to be supplied by an external power supply and does not need to pass integration, directly generates electric signals representing the magnetic field and the magnetic induction intensity thereof, and outputs a final voltage signal after signal conditioning.
When the magnetic flux sensor in the scheme is used for testing, the external data acquisition analyzer is required to be a magnetic detector, and the portable magnetic detector is provided with a standard platform and an LCD display.
The invention has the beneficial effects that:
1. the flexible coil assembly is modularized, mature data line manufacturing technology is fully utilized in manufacturing, and the flexible coil assembly is easy to manufacture;
2. the flexible coil assembly is manufactured in advance, so that the field operation time is saved, the labor cost is reduced, and the investment is saved;
3. the flexible coil assembly is convenient for standardization and serialization. For common inhaul cable series with various specifications, the design parameters of existing cylindrical magnetic flux sensors in the industry can be referred to, corresponding flexible coil component series are designed, corresponding adjacent multilayer flexible coil components are calibrated in advance for inhaul cables with various specifications, calibration curves are manufactured, and the inhaul cables are convenient to directly select from measurement items. The design and the manufacture of the cylindrical magnetic flux sensor are simplified; the calibration and design is a cyclic optimization process, and finally, a reasonable flexible coil assembly series and internal parameters of each flexible coil assembly are determined. Finally, the series of flexible coil assemblies can be used to combine magnetic flux sensors that fit any gauge cable.
4. Each component of the magnetic flux sensor in the scheme is light in weight and convenient to carry and mount;
5. the magnetic flux sensor can be used for short-time measurement and long-term monitoring;
6. the solution is also applicable to the manufacture or replacement of coils inside conventional sleeve-type magnetic flux sensors, i.e. inside flexible coil assemblies.
7. The abnormal sensor can be conveniently checked, and the damaged module can be conveniently maintained and replaced.
The flexible magnetic flux sensor in the scheme can be applied to measuring the tension of a cable in a structure, and comprises a cable in a cable-stayed bridge, a suspender and a tie bar in a tie-bar arch bridge, a large cable and a suspender in a suspension bridge, a tension member in a tension structure, an external prestress cable in a prestress structure and the like.
Drawings
FIG. 1 is a schematic diagram showing the deployment of a flexible coil assembly in an excitation coil according to example 1;
FIG. 2 is an end view of the connection head of the flexible coil assembly of FIG. 1;
FIG. 3 is a schematic view of the numbering of the jacks, pins and wires of FIG. 1;
FIG. 4 is a schematic diagram of the series connection of the conductive lines in FIG. 3;
FIG. 5 is a schematic view of a jack catch plate;
FIG. 6 is a schematic view of a pin card;
FIG. 7 is a schematic cross-sectional view of a pin;
FIG. 8 is a schematic end view of a flexible coil-bladder assembly;
FIG. 9 is a schematic view of the upper end face of the exciting coil;
FIG. 10 is a schematic view of the sensor of example 1 after field installation;
fig. 11 is an end view of the connection head of the flexible coil assembly in embodiment 2;
fig. 12 is a view of the right connecting head of fig. 11 along the length direction;
FIG. 13 is a schematic end view of the flexible coil-resilient gasket assembly of example 2;
FIG. 14 is a schematic top view of an excitation coil in example 2;
FIG. 15 is a schematic view of the sensor of example 2 after field installation;
FIG. 16 is a schematic diagram of the sensor of example 3 after field installation.
In the figure: 1 right connector, 2 left connector, 3 positioning lug, 4 flexible line band, 5 upper end lead-out wire, 6 lower end lead-out wire, 7 jack, 8 pin, 9 lead wire, 11 jack clamp plate, 12 jack clamp plate, 13 clamp pin, 14 pin clamp plate, 15 pin clamp plate, 16 pin, 21 flexible coil component, 22 connecting block, 23 air bag, 24 left vent pipe, 25 right vent pipe, 26 guy cable, 27 first layer flexible coil-air bag assembly, 28 second layer flexible coil-air bag assembly, 29 third layer flexible coil-air bag assembly, 30 air inlet pipe, 31 air outlet pipe, 32 exciting coil, 33 induction coil, 34 total air inlet pipe, 35 total air outlet pipe, 36 exciting coil connecting wire, 37 induction coil connecting wire, 38 first air valve, 39 second air valve, 40 temperature signal line, 41 rubber gasket, 42 first layer flexible coil-elastic gasket assembly, 43 second layer flexible coil-elastic gasket assembly, 44 a third layer of flexible coil-elastic gasket combination, 45 a tray, 46 a positioning hoop, 47 a positioning card, 48 a magneto-electric sensing element, 49 a magnetic field intensity signal wire and 50 aluminum foil strips.
Detailed Description
Example 1
The magnetic flux sensor in this embodiment includes an excitation coil and an induction coil, the selected shaped body is a balloon, which can be used for long-term monitoring, and the schematic diagram of the sensor after installation is shown in fig. 10. The diameter of the guy cable 26 is 116mm, and each component parameter is designed by referring to a CCT120 type magnetic flux sensor (inner diameter 120mm, outer diameter 200mm, height 350mm) of OVM in Liuzhou. Fig. 1-4 are schematic diagrams of a flexible coil assembly in an excitation coil, a flexible wire tape 4 has 81 wires 9, the wires 9 are enameled wires with copper wires inside, and the wires 9 are wrapped by plastic; the flexible line strip 4 is manufactured by the manufacturing technology of the IDE data line. One wire 9 is pulled up from each of the upper and lower ends, the upper end is an upper end lead wire 5, and the lower end is a lower end lead wire 6, so that 80 wires 9 are provided on each of the left and right sides. Adopt the joint of 80 lines, including right connector 1 and left connector 2, the latter is for taking jack 7 side, and the medial surface has location lug 3, and the former is for taking contact pin 8 side, has corresponding recess to be used for the location. As shown in fig. 3, the wire 9, the jack 7 and the pin 8 are numbered, the pin 8 with the same number in the right connector 1 is inserted into the jack 7 in the left connector 2, after insertion, the wire 9 is connected in series, and the expanded connection schematic diagram is shown in fig. 4. The internal construction of the connector with the jack 7 and the connection with the flexible line 4 adopt the technical method in the IDE data line. Referring to fig. 5, 6 and 7, a jack catch plate 11 corresponding to each jack 7 in the connector with the jacks 7 is divided into a jack catch 12 and a catch 13, the shape and size of which are the same as those in the IDE data line, the jack catch 12 is connected with the lead wires 9, and the catch 13 is used for electrically connecting the pins 8. The pin card 14 includes a pin keeper 15 that connects with the conductor 9 and a pin 16. The size of the pin chuck 15 is the same as that of the jack chuck 12, and the connection mode with the lead 9 is the same as that of the jack chuck 12. The pin 16 is formed by rolling the side plate section. Fig. 8 is a schematic end view of the flexible coil-airbag assembly, and the flexible ribbon 4 is called as a flexible coil assembly 21 after being installed with the right connector 1 and the left connector 2 on two sides, and a coil is formed after the two connectors are connected, so that the right connector 1 and the left connector 2 form a connecting block 22 at this time.
After the air bag 23 with the left vent pipe 24 and the right vent pipe 25 is arranged in the flexible coil component 21, a flexible coil-air bag combination body is formed, and the material of the air bag 23 and the air bag in the sphygmomanometer are made of air-tight cloth. The upper end face of the exciting coil is schematically shown in fig. 9, and the exciting coil 32 mainly comprises a first layer flexible coil-air bag assembly 27, a second layer flexible coil-air bag assembly 28, a third layer flexible coil-air bag assembly 29, an air inlet pipe 30 and an air outlet pipe 31. The air inlet pipe 30 is connected with the right vent pipe 25 of the third layer flexible coil-air bag combination 29, the air outlet pipe 31 is connected with the left vent pipe 24 of the first layer flexible coil-air bag combination 27, the left vent pipe 24 of the third layer flexible coil-air bag combination 29 is communicated with the left vent pipe 24 of the second layer flexible coil-air bag combination 28, and the right vent pipe 25 of the second layer flexible coil-air bag combination 28 is communicated with the right vent pipe 25 of the first layer flexible coil-air bag combination 27. After inflation, the bladders bulge out so that the flexible coil assemblies 21 are circular in cross-section and the innermost bladder 23 is pressed against the surface of the cable 26. The air pressure should not be too high to avoid spreading the connecting block 22. The upper end lead wires 5 of each layer are connected in parallel, the lower end lead wires 6 are connected in parallel to form an exciting coil connecting wire 36 of the exciting coil 32.
The induction coil 33 uses the flexible line 4 of 41 lines, and has the same structure as the excitation coil 32, and the same manufacturing and mounting method. There are accordingly induction coil connection lines 37. The total air inlet pipe 34 is communicated with the air inlet pipe 30 of the exciting coil 32, the total air outlet pipe 35 is communicated with the corresponding air outlet pipe of the induction coil 33, and the corresponding air inlet pipe of the induction coil 33 is communicated with the air outlet pipe 31 of the exciting coil 32. The main air outlet pipe 35 is provided with a first air valve 38, the main air inlet pipe 34 is provided with a second air valve 39, and the first air valve 38 and the second air valve 39 are closed after inflation, so that cable force measurement can be carried out.
If long-term on-line monitoring is desired, it is desirable that the inside diameter of the total outlet duct 35 be smaller than the inside diameter of the total inlet duct 34, that the first air valve 38 and the second air valve 39 remain open, and that the geometry of the magnetic flux sensor be maintained for a long period of time by using a miniature air pump to supply air all the way. The coil is convenient to dissipate heat by always ventilating.
Example 2
This example is a modification of example 1 for a short cable force measurement. The difference from embodiment 1 is that a thin sheet made of soft rubber is used as a shaping body of the flexible coil unit 21. Fig. 11 is a schematic end view of the connecting head of the flexible coil assembly 21, and in order to ensure that the connecting block 22 does not loosen itself, two positioning clips 47 are designed on the outer side surface of the right connecting head 1, and the schematic view is shown in fig. 12. Fig. 13 is a schematic end view of the flexible coil-elastic pad assembly, and the rubber pad 41 is a shaped body. Fig. 14 is a schematic top view of the excitation coil 32, and the excitation coil 32 mainly includes a first layer of flexible coil-elastic pad assembly 42, a second layer of flexible coil-elastic pad assembly 43, and a third layer of flexible coil-elastic pad assembly 44. Fig. 15 is a schematic diagram of the sensor after field installation, and a temperature sensor is added to the sensor to have a temperature measuring function, and a temperature signal wire 40 is extended outwards. To ensure that the sensor assembly does not slide down, a haversian tray 45 is provided at the lower end, secured to the cable by a retaining clip 46. Because of the inconvenient automatic heat dissipation of this sensor, be applicable to the short time and measure.
Example 3
This embodiment is a modification of embodiment 2, and fig. 16 is a schematic view of the sensor after field installation. The component for measuring the magnetic field strength in this embodiment is a magneto-electric sensing element 48, from which a magnetic field strength signal line 49 extends. This makes the structure of the sensor simpler, and the use of standard electronic components can improve the accuracy of the sensor. To avoid interference of the ambient magnetic field with the measurement results, an aluminum foil strip 50 is wound around the outer surface of the excitation coil 32.
Claims (10)
1. A flexible magnetic flux sensor comprising an excitation coil and an assembly for measuring magnetic field strength, characterized in that: the excitation coil is provided with a flexible coil component; the flexible coil component is manufactured by adopting a data line manufacturing technology for connecting an optical drive and a hard disk in a computer, and comprises a flexible line belt and connectors at two ends; the flexible line belt is provided with leads which are arranged in the flexible electric insulation protective layer side by side; in the flexible coil component, two ends of the flexible line belt are provided with corresponding connectors, and the wires in the flexible line belt are sequentially connected in series after being spliced.
2. A method for manufacturing and installing a flexible magnetic flux sensor mainly comprises the following steps:
step 1, adopting a data line manufacturing technology for connecting an optical drive and a hard disk in a computer to prepare a flexible line tape and two corresponding connectors; correspondingly installing the two connectors at two ends of the flexible line belt to form a flexible coil assembly;
step 2, preparing a shaping body which is used for the inner side of the flexible coil assembly and ensures that the cross section of the flexible coil assembly is circular after the flexible coil assembly is installed; the width of the shaping body is more than or equal to the width of the flexible line belt, and the thickness is adjustable; the flexible coil assembly and the shaping body form a flexible coil assembly;
step 3, mounting a plurality of layers of flexible coil assemblies on the guy cable of the structure to form an excitation coil; each layer of shaping body is tightly attached to the flexible coil assemblies on two sides, the inner side of the shaping body on the innermost layer is tightly attached to the surface of the inhaul cable, and the inner side of the shaping body on the innermost layer is electrically connected with the lead-out wires of the leads of each flexible coil assembly;
and 4, step 4: an assembly for measuring the magnetic field strength is installed.
3. A flexible magnetic flux sensor according to claim 1, wherein: the wire is a copper wire, and the copper wire consists of a single copper wire or a plurality of copper wires.
4. A flexible magnetic flux sensor according to claim 1, wherein: the connector is the same as the IDE data line jack end in one type and is called a jack connector; the other type of connector is provided with corresponding contact pins and is called a contact pin connector, a contact pin clamping plate with contact pins is arranged in the connector, and the contact pin clamping plate is contacted with the conducting wires in the flexible line band; correspondingly, what is referred to as a receptacle card within the receptacle connector; the pin clamping plate is different from the jack clamping plate in that a pin is used; the contact pin is formed by rolling a plate section at the corresponding end, and the middle part of the plate section is connected with the other section.
5. A flexible magnetic flux sensor according to claim 1, wherein: the component for measuring the magnetic field intensity is an induction coil.
6. A flexible magnetic flux sensor according to claim 1, wherein: the flexible magnetic flux sensor comprises a temperature sensor.
7. A method of making and installing a flexible magnetic flux sensor according to claim 2, wherein: the shaping body is an air bag with two air pipes or a thin plate made of soft rubber.
8. A method of making and installing a flexible magnetic flux sensor according to claim 2, wherein: the following steps are added in the method,
and 5: and a layer of aluminum foil is wrapped on the outer surface of the exciting coil.
9. A flexible magnetic flux sensor and method of making and installing the same as claimed in claim 5 and claim 2 wherein: the induction coil and the exciting coil have the same structure, and the corresponding manufacturing and mounting methods are also the same.
10. A flexible magnetic flux sensor and method of making and installing the same as claimed in claim 8 and claim 9 wherein: after the manufacturing and mounting method, a step is added,
step 6: and a layer of aluminum foil is wrapped on the outer surface of the induction coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010723302.7A CN111830445A (en) | 2020-07-24 | 2020-07-24 | Flexible magnetic flux sensor and manufacturing and mounting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010723302.7A CN111830445A (en) | 2020-07-24 | 2020-07-24 | Flexible magnetic flux sensor and manufacturing and mounting method thereof |
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| CN111830445A true CN111830445A (en) | 2020-10-27 |
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| CN202010723302.7A Pending CN111830445A (en) | 2020-07-24 | 2020-07-24 | Flexible magnetic flux sensor and manufacturing and mounting method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680156A (en) * | 2012-05-04 | 2012-09-19 | 东南大学 | Coupled external mounted steel stay rope force detection device and method |
| CN104698402A (en) * | 2015-03-03 | 2015-06-10 | 江西飞尚科技有限公司 | Ribbon cable detection method for magnetic flux of open loop magnetic flux sensor |
| CN107478147A (en) * | 2017-08-01 | 2017-12-15 | 湘潭大学 | Come off oxide skin ulking thickness pulse eddy current detection method and device in a kind of austenite boiler tube |
| CN109406631A (en) * | 2018-11-28 | 2019-03-01 | 交通运输部公路科学研究所 | A kind of parallel steel wire draws hoist cable detection device and method |
-
2020
- 2020-07-24 CN CN202010723302.7A patent/CN111830445A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680156A (en) * | 2012-05-04 | 2012-09-19 | 东南大学 | Coupled external mounted steel stay rope force detection device and method |
| CN104698402A (en) * | 2015-03-03 | 2015-06-10 | 江西飞尚科技有限公司 | Ribbon cable detection method for magnetic flux of open loop magnetic flux sensor |
| CN107478147A (en) * | 2017-08-01 | 2017-12-15 | 湘潭大学 | Come off oxide skin ulking thickness pulse eddy current detection method and device in a kind of austenite boiler tube |
| CN109406631A (en) * | 2018-11-28 | 2019-03-01 | 交通运输部公路科学研究所 | A kind of parallel steel wire draws hoist cable detection device and method |
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Application publication date: 20201027 |