CN206862533U - Cable force measurement device based on electromagnetic induction - Google Patents
Cable force measurement device based on electromagnetic induction Download PDFInfo
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- CN206862533U CN206862533U CN201720683098.4U CN201720683098U CN206862533U CN 206862533 U CN206862533 U CN 206862533U CN 201720683098 U CN201720683098 U CN 201720683098U CN 206862533 U CN206862533 U CN 206862533U
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Abstract
Cable force measurement device of the utility model based on electromagnetic induction belongs to science of bridge building field of measuring technique；The device includes magnetic grid, shielding case, coil brace, actuating coil, lead, coil rack, guide rail disk and fixed support；Described magnetic grid is by being circumferentially pasted onto drag-line outer surface, described coil rack is made up of the superposition of multi-disc alloy sheet, coil rack is fixed in shielding case by two coil braces, two actuating coils are wrapped on the relative right-angle side of coil rack, described actuating coil is connected in series, another the two poles of the earth are connected by lead through shielding case with measures conversion circuit, and shielding case is fixed on ground by guide rail disk and fixed support；Cable force measurement device of the utility model based on electromagnetic induction, sensing unit design is simple, cheap, and measurement accuracy is high, and measuring apparatus is simple and convenient, suitable for construction and the cable force measurement of operation stage.
Description
Technical field
Cable force measurement device of the utility model based on electromagnetic induction belongs to science of bridge building field of measuring technique.
Background technology
Drag-line is the important supporting member of cable-stayed bridge, suspension bridge, it is necessary to adjust the rope of drag-line in the design and construction of bridge
Power, bridge is set to be in optimal stress；Simultaneously after bridge comes into operation, in the later stage in the maintenance process of bridge, also needing
To adjust Suo Li in time, be allowed to meet design requirement, so accurately measured the Suo Li of bridge cable, to bridge construction with
And later stage operation maintenance plays very important effect.
In the existing measuring method to bridge cable force, pressure gauge method is only applicable to bridge with pressure sensor calibrating method and applied
Measurement of the work stage to Cable power, wherein pressure gauge method need to carry out artificial reading to pressure dial plate, and measurement error is big；Sensor
Standardization need to be pre-buried such as anchorage zone by sensor, and load-bearing scope it is big pressure sensor it is expensive.Frequency method is drawn with obtaining
Rope vibration frequency is means, can ask for the Suo Li of drag-line indirectly using frequency and Suo Li mechanical equations.Frequency method at present more to be used
Acceleration transducer picks up the vibration frequency of drag-line, but high there is sensor cost, and data acquisition equipment is complicated, and by bridge
Vibration additive effect of the surface vibration on drag-line influences, and causes measurement accuracy to reduce.
Utility model content
In order to solve the above problems, the utility model provides the cable force measurement device based on electromagnetic induction, and the device can
For construction and the cable force measurement of operation stage, measurement accuracy is high, and equipment cost is low.
What the purpose of this utility model was realized in：
Cable force measurement device based on electromagnetic induction, including magnetic grid, shielding case, coil brace, actuating coil, lead, line
Ring framework, guide rail disk and fixed support；Described magnetic grid is by being circumferentially pasted onto the magnetic grid matrix of drag-line outer surface and uniformly covering
Cover the magnetic overlay film composition in magnetic grid matrix surface；
Described coil rack is made up of the superposition of multi-disc alloy sheet, and alloy sheet is the pentagon that two neighboring interior angle is right angle
Framework, perpendicular bisector of the interior angle where acute angle is with shielding shell opener midpoint in same level, and coil rack is in shielding case
Fixed by two coil braces, two actuating coils are wrapped on the relative right-angle side of coil rack；
Described actuating coil is connected in series, and another the two poles of the earth are connected by lead through shielding case with measures conversion circuit, screen
Cover shell to be connected support by guide rail disk, and ground is fixed on by fixed support；
Described guide rail disk is made up of chassis, drawing spring and sliding block, and be arranged in parallel two T-shaped guide rails on chassis, guide rail
One end open, other end closure, put down in the closed end of guide rail by drawing spring connecting base plate and sliding block, slider top to be square
Face, and vertical plane direction is symmetrical arranged four screwed holes, sliding block can be on guide rail slidably.
The above-mentioned cable force measurement device based on electromagnetic induction, when shielding case is close to magnetic grid, between coil rack and magnetic grid
Leave 0.2mm gap.
The above-mentioned cable force measurement device based on electromagnetic induction, in shielding case, the position of actuating coil is in coil brace
In the chamber formed with shielding case, filled with colloid in chamber.
The above-mentioned cable force measurement device based on electromagnetic induction, what described converted measurement circuit included being connected with lead puts
Big circuit, the filtering shaping circuit and single-chip microcomputer being connected with amplifying circuit.
The above-mentioned cable force measurement device based on electromagnetic induction, lead output are connected to the positive input of amplifier and anti-
To input, resistance R2 is respectively connecting to the reverse input end of amplifier and output end forms reversely amplification, positive input warp
Resistance R1 is grounded, and output end is connected to filtering shaping circuit；
Described filtering shaping circuit is connected to the reverse input end of amplifier by the output of amplifying circuit by resistance R3,
The reverse input end of amplifier is grounded by electric capacity C1, and the positive input of amplifier is grounded by resistance R4, passes through series connection
Resistance R5, R6 are connected to output end and form hysteresis loop comparator, and output end passes through resistance R6 connection single-chip microcomputers.
Beneficial effect：Cable force measurement device of the utility model based on electromagnetic induction, the device utilize electromagnetic induction principle,
When inhaul cable vibration, the relative actuating coil of magnetic grid meeting being pasted onto on drag-line is moved, the magnetic signal now recorded in magnetic grid
It is converted into electric signal.When drag-line is with respect to actuating coil sustained vibration, actuating coil will continue output induced electromotive force, and pass through
Converted measurement circuit is amplified, filtered, after shaping, is sent into single-chip microcomputer and carries out signal transacting, obtains the vibration frequency of drag-line.Pass
It is simple to feel unit design, cheap, and measurement accuracy is high, measuring apparatus is simple and convenient, suitable for construction and operation stage
Cable force measurement.
Brief description of the drawings
Fig. 1 is the structural representation of cable force measurement device of the utility model based on electromagnetic induction.
Fig. 2 is the structural representation of the utility model guide rail disk.
Fig. 3 is the circuit diagram of the utility model amplifying circuit.
Fig. 4 is the circuit diagram of the utility model filtering shaping circuit.
In figure：1 magnetic grid, 2 shielding cases, 3 coil braces, 4 actuating coils, 5 leads, 6 coil racks, 7 guide rail disks, 71 bottoms
Disk, 72 drawing springs, 73 sliding blocks, 8 fixed supports.
Embodiment
The utility model embodiment is described in further detail below in conjunction with the accompanying drawings.
Specific embodiment one
The cable force measurement device based on electromagnetic induction of the present embodiment, structural representation is as shown in figure 1, the knot of guide rail disk 7
Structure schematic diagram is as shown in Fig. 2 including magnetic grid 1, shielding case 2, coil brace 3, actuating coil 4, lead 5, coil rack 6, guide rail
Disk 7 and fixed support 8；Described magnetic grid 1 by be circumferentially pasted onto drag-line outer surface magnetic grid matrix and uniform fold in magnetic grid
The magnetic overlay film composition of matrix surface；
Described coil rack 6 is made up of the superposition of multi-disc alloy sheet, and alloy sheet is five sides that two neighboring interior angle is right angle
Shape framework, interior angle are that the perpendicular bisector where acute angle is open midpoint in same level with shielding case 2, and coil rack 6 is shielding
Fixed in shell 2 by two coil braces 3, two actuating coils 4 are wrapped on the relative right-angle side of coil rack 6；
Described actuating coil 4 is connected in series, and another the two poles of the earth are connected by lead 5 through shielding case 2 with measures conversion circuit,
Shielding case 2 is connected support 8 by guide rail disk 7, and is fixed on ground by fixed support 8；
Described guide rail disk 7 by chassis 71, drawing spring 72 and sliding block 73 form, be arranged in parallel on chassis 71 two it is T-shaped
Guide rail, guide rail one end open, other end closure, guide rail closed end by the connecting base plate 71 of drawing spring 72 and sliding block 73, it is sliding
The top of block 73 is square planar, and vertical plane direction is symmetrical arranged four screwed holes, and sliding block 73 being capable of the free skating on guide rail
It is dynamic.
Cable force measurement device of the utility model based on electromagnetic induction, using electromagnetic induction principle, when inhaul cable vibration, glue
The relative actuating coil 4 of the meeting of magnetic grid 1 being attached on drag-line is moved, and now the magnetic signal of record is converted into electric signal in magnetic grid 1.
When drag-line will continue output induced electromotive force with respect to actuating coil sustained vibration, actuating coil 4；Guide rail disk 7 defines shielding
After each element is only capable of realizing one-dimensional translation in shell 2 and shielding case 2, and drag-line promotes shielding case to be moved, device can pull
Remain to keep being close to drag-line surface in the presence of spring 72, ensure that the accuracy of measurement.
Specific embodiment two
The cable force measurement device based on electromagnetic induction of the present embodiment, is equally applicable to Fig. 1, in the base of specific embodiment one
On plinth, when further restriction shielding case 2 is close to magnetic grid 1,0.2mm gap is left between coil rack 6 and magnetic grid 1.The design
Avoid the abrasion to coil rack 6.
Specific embodiment three
The cable force measurement device based on electromagnetic induction of the present embodiment, is equally applicable to Fig. 1, in the base of specific embodiment one
On plinth, further it is limited in shielding case 2, the position of actuating coil 4 is in the chamber that coil brace 3 and shielding case 2 are formed, chamber
Interior is filled with colloid.This is designed as dust-proof, waterproofing design, avoids the influence of measuring environment.
Specific embodiment four
The cable force measurement device based on electromagnetic induction of the present embodiment, circuit diagram such as Fig. 3, Fig. 4 institute of converted measurement circuit
Show, on the basis of specific embodiment one, further limit converted measurement circuit include the amplifying circuit that be connected with lead 5 and
The filtering shaping circuit and single-chip microcomputer of amplifying circuit connection.
Lead 5 exports the positive input and reverse input end for being connected to amplifier, and resistance R2 is respectively connecting to amplifier
Reverse input end and output end form reversely amplification, positive input is grounded through resistance R1, and output end is connected to filter shape
Circuit；
Described filtering shaping circuit is connected to the reverse input end of amplifier by the output of amplifying circuit by resistance R3,
The reverse input end of amplifier is grounded by electric capacity C1, and the positive input of amplifier is grounded by resistance R4, passes through series connection
Resistance R5, R6 are connected to output end and form hysteresis loop comparator, and output end passes through resistance R6 connection single-chip microcomputers.
After drag-line produces vibration under external drive, magnetic grid 1 produces motion with respect to present apparatus other elements, according to electromagnetism
Principle of induction, induced electromotive force can be produced in actuating coil 4, be amplified in amplifying circuit, after filter circuit is filtered, profit
Signal shaping is carried out with hysteresis loop comparator, single-chip microcomputer is then fed into and is handled.
The frequency of induced electromotive force is equal with inhaul cable vibration frequency, and the device measures to induced electromotive force, by picking up
The vibration frequency of the frequency indirect gain drag-line of induced electromotive force is taken, then passes through the mechanical equation of drag-line frequency and Cable power
Ask for Suo Li T, mechanical equation such as following formula：
T=4ml2f2
Wherein, T represents Cable power (N), and m represents drag-line line density (kg/m), and l represents drag-line computational length (m), f tables
Show vibration frequency (Hz).
Claims (5)
1. the cable force measurement device based on electromagnetic induction, it is characterised in that：Including magnetic grid (1), shielding case (2), coil brace
(3), actuating coil (4), lead (5), coil rack (6), guide rail disk (7) and fixed support (8)；Described magnetic grid (1) is by edge
Circumference is pasted onto the magnetic grid matrix of drag-line outer surface and uniform fold forms in the magnetic overlay film of magnetic grid matrix surface；
Described coil rack (6) is made up of the superposition of multi-disc alloy sheet, and alloy sheet is the pentagon that two neighboring interior angle is right angle
Framework, interior angle are that the perpendicular bisector where acute angle is open midpoint in same level with shielding case (2), and coil rack (6) is shielding
Cover in shell (2) and fixed by two coil braces (3), two actuating coils (4) are wrapped in the relative right-angle side of coil rack (6)
On；
Described actuating coil (4) is connected in series, and another the two poles of the earth are connected by lead (5) through shielding case (2) and measures conversion circuit
Connect, shielding case (2) is connected support (8) by guide rail disk (7), and is fixed on ground by fixed support (8)；
Described guide rail disk (7) is made up of chassis (71), drawing spring (72) and sliding block (73), be arranged two on chassis (71) in parallel
The T-shaped guide rail of bar, guide rail one end open, the other end closure, guide rail closed end by drawing spring (72) connecting base plate (71) with
Sliding block (73), sliding block (73) top is square planar, and vertical plane direction is symmetrical arranged four screwed holes, and sliding block (73) can
On guide rail slidably.
2. the cable force measurement device according to claim 1 based on electromagnetic induction, it is characterised in that：Shielding case (2) is close to
During magnetic grid (1), 0.2mm gap is left between coil rack (6) and magnetic grid (1).
3. the cable force measurement device according to claim 1 based on electromagnetic induction, it is characterised in that：In shielding case (2),
The position of actuating coil (4) is in the chamber that coil brace (3) and shielding case (2) are formed, filled with colloid in chamber.
4. the cable force measurement device according to claim 1 based on electromagnetic induction, it is characterised in that：Described converted measurement
Circuit includes the amplifying circuit being connected with lead (5), the filtering shaping circuit and single-chip microcomputer that are connected with amplifying circuit.
5. the cable force measurement device according to claim 4 based on electromagnetic induction, it is characterised in that：Lead (5) output connects
The positive input and reverse input end of amplifier are connected to, resistance R2 is respectively connecting to the reverse input end and output end of amplifier
Reversely amplification is formed, positive input is grounded through resistance R1, and output end is connected to filtering shaping circuit；
Described filtering shaping circuit is connected to the reverse input end of amplifier by the output of amplifying circuit by resistance R3, amplification
The reverse input end of device is grounded by electric capacity C1, and the positive input of amplifier is grounded by resistance R4, passes through the resistance of series connection
R5, R6 are connected to output end and form hysteresis loop comparator, and output end passes through resistance R6 connection single-chip microcomputers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720683098.4U CN206862533U (en) | 2017-06-13 | 2017-06-13 | Cable force measurement device based on electromagnetic induction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720683098.4U CN206862533U (en) | 2017-06-13 | 2017-06-13 | Cable force measurement device based on electromagnetic induction |
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| Publication Number | Publication Date |
|---|---|
| CN206862533U true CN206862533U (en) | 2018-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720683098.4U Active CN206862533U (en) | 2017-06-13 | 2017-06-13 | Cable force measurement device based on electromagnetic induction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928890A (en) * | 2020-07-14 | 2020-11-13 | 宁波大学 | Method for measuring self-vibration frequency and cable force of inhaul cable in real time |
| CN117782400A (en) * | 2024-02-23 | 2024-03-29 | 贵州桥梁建设集团有限责任公司 | Bridge cable force monitoring and early warning device with cable structure |
-
2017
- 2017-06-13 CN CN201720683098.4U patent/CN206862533U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928890A (en) * | 2020-07-14 | 2020-11-13 | 宁波大学 | Method for measuring self-vibration frequency and cable force of inhaul cable in real time |
| CN117782400A (en) * | 2024-02-23 | 2024-03-29 | 贵州桥梁建设集团有限责任公司 | Bridge cable force monitoring and early warning device with cable structure |
| CN117782400B (en) * | 2024-02-23 | 2024-04-26 | 贵州桥梁建设集团有限责任公司 | Bridge cable force monitoring and early warning device with cable structure |
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