CN100587409C - Method for measuring two-dimension displacement and two-dimension displacement sensor - Google Patents
Method for measuring two-dimension displacement and two-dimension displacement sensor Download PDFInfo
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- CN100587409C CN100587409C CN200610026294A CN200610026294A CN100587409C CN 100587409 C CN100587409 C CN 100587409C CN 200610026294 A CN200610026294 A CN 200610026294A CN 200610026294 A CN200610026294 A CN 200610026294A CN 100587409 C CN100587409 C CN 100587409C
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Abstract
This invention relates to one 2D displacement measurement method, which comprises the following steps: according to Wheatstone bridge circuit test principle to distribute the bridge resistance wire into direct or arc shape and the direct resistance wire is to test line displacement; the arc resistance wire is to test arc length change volume and then according to the relationship between arc length and radium to get test point rotary angle; through testing points in electrode coordinate displacement change to realize 2D displacement. The 2D displacement sensor comprises the test bridge line resistance wire and arc resistance wire fixed onto one structure around axis and it also comprises data transmission line.
Description
Technical field
The invention belongs to the surveying instrument field, relate to the displacement measuring device that can be used for civil engineering work test, mechanical monitoring field, especially can realize the device of single-sensor the measurement of measured point two-dimension displacement.
Background technology
At present, the measurement to displacement all is to use the one dimension displacement sensor in the civil engineering work field tests both at home and abroad, and the displacement of measured point is created in both direction mostly, when measuring two-dimension displacement with the array mode of one dimension displacement sensor, can produce bigger error, influence output result's precision.
Summary of the invention
The purpose of this invention is to provide a kind of two-dimension displacement sensor, it can measure the two-dimension displacement of measured point accurately.
The object of the present invention is achieved like this: the linear resistance wire and the circular arc resistance silk that are installed in the same tool housing are connected composition changing resistor type strain bridge respectively, when the measured point drives the generation radial displacement of sensor slide bar and the anglec of rotation, the swept resistance contact can slide on resistance wire, cause the variation of voltage between the interdependent node in the electric bridge, the relevant initial parameter with instrument of data by instrument output can obtain the displacement that measuring point produces and the variation of angle in polar coordinate system, by the conversion relation between polar coordinates and the rectangular coordinate, obtain the two-dimension displacement of measuring point under rectangular coordinate system.Be the protection instrument and improve measuring accuracy, instrument internal is provided with dynamic self balancing device, and the instrument data output line draws from circular shaft with holes inside, and the center of gravity that guarantees instrument is all the time by its rotary middle spindle.
A kind of method for measuring two-dimension displacement, according to the Wheatstone bridge circuit test philosophy, the resistance wire that is connected in the electric bridge is arranged to linear and circular arc, the linear resistance wire is used to measure the linear displacement, the circular arc resistance silk is used to measure the arc length variable quantity of circular arc, and the relation according to arc length and radius calculates the anglec of rotation of measuring point around the center of circle again.
Further, realize the two-dimension displacement measurement by measuring measured point method of displacement variable in polar coordinate system.
A kind of two-dimension displacement sensor comprises linear resistance wire and the circular arc resistance silk of forming test electric bridge, and both are installed to one can be in the structure that stationary shaft rotates.
Further, comprising: with the radially slide bar that measuring point links to each other, it is installed in can be in the shell of turning axle rotation; Shell is mounted fixing by rigid support and Hollow Cylindrical Shaft; Be connected in the measuring bridge linear radially resistance wire and circular arc hoop resistance wire be mounted respectively on pedestal and round base, pedestal is fixed on the shell, round base is fixed on the support by circular shaft with holes; Described linear radially resistance wire and circular arc hoop resistance wire is received in the test electric bridge by resistance coil terminal box separately respectively.
Also comprise data line, it is drawn from circular shaft with holes inside, and instrument internal is provided with keeps the dynamic self balancing device that the instrument center of gravity is passed through its rotary middle spindle all the time.
When only arranging the circular arc resistance silk in the instrument, it can be made angle measuring instrument.
Owing to adopt such scheme, can measure the two-dimension displacement of measuring point accurately, simple in structure, the measuring accuracy height.
Description of drawings
Fig. 1 is the circuit theory synoptic diagram of an embodiment of the present invention.
Fig. 2 is that principle schematic is calculated in the displacement of an embodiment of the present invention sensor.
Fig. 3 is the front elevational schematic of an embodiment of the present invention sensor.
Fig. 4 is the 1-1 diagrammatic cross-section that indicates on Fig. 3.
Fig. 5 be indicate on Fig. 4 the 2-2 diagrammatic cross-section.
Fig. 6 be indicate on Fig. 4 the 3-3 diagrammatic cross-section.
Embodiment
See also Fig. 1-6, an embodiment of the present invention comprises among the figure: radially slide bar 1, sensor outer housing 2, turning axle 3, bearing 4, radial displacement reading hole 5, angular readings dish 6, circular shaft with holes 7, radial displacement resistance wire 8, hoop displacement resistance wire 9, radially resistance contact head 10, hoop resistance contact head 11, radially resistance wire pedestal 12, hoop resistance wire pedestal 13, radially returning spring 14, self-equilibrating slide block 15, slider waveguide rod 16, radially resistance wire terminal box 17, hoop resistance wire terminal box 18.
Fig. 1 is a differential changing resistor type strain bridge principle schematic of the present invention.R ' is the resistance wire in this device among the figure, goes up when mobile at R ' when extraneous displacement drives slider B, can cause the variation of voltage between B on the bridge circuit, the D at 2, thereby reaches the purpose of the capable electrical measurement of contraposition shift-in.R ' can make the straight-line displacement that linear is measured measuring point as required, also can do camber and measure the arc length that measuring point moves along certain center of circle, two kinds of resistance wires of straight line and arc perhaps are installed in same instrument simultaneously, are carried out straight-line displacement simultaneously and along the two-dimensional measurement of center of circle angle variable quantity.
Fig. 2 is that principle schematic is calculated in displacement of the present invention.When the measured point drives the end of slide bar 1 radially the M point moves to the N point from figure, be in the polar coordinate system in the center of circle with the O point, displacement can be resolved into axial displacement Δ r of slide bar radially 1 and the rotation angle tolerance Δ θ of ordering along O, promptly be equivalent to measuring point and moved (Δ r, Δ θ), displacement in the polar coordinate system (Δ r, Δ θ) can be converted to (Δ x, Δ y) in the rectangular coordinate system by formula 1, formula 2.Δ r is obtained by the radial displacement of sensor (being obtained by the slip of resistance contact head 10 on radial displacement resistance wire 8 radially) in the formula, and Δ θ is converted according to the relation of arc length radius by the hoop displacement (being obtained by the slip of hoop resistance contact head 11 on hoop displacement resistance wire 10) of sensor and obtains.
Δ x=r
0-(r
0-Δ r) cos Δ θ formula 1
Δ y=(r
0-Δ r) sin Δ θ formula 2
In Fig. 3, Fig. 4, Fig. 5 and Fig. 6, the radially slide bar 1 that links to each other with measuring point is installed in and can centers in the shell 2 of turning axle 3 rotations.Shell is mounted fixing by rigid support 4 and Hollow Cylindrical Shaft 7.Be connected in the measuring bridge linear radially resistance wire 8 and circular arc hoop resistance wire 9 be mounted respectively on pedestal 12 and round base 13, pedestal 12 is fixed on the shell 2, round base 13 is fixed on the support 4 by circular shaft 7 with holes.Resistance wire 8 and resistance wire 9 are received in the test electric bridge by resistance coil terminal box 17 and 18 respectively.Radially slide bar 1 end is under the measured point displacement drives, can making radially, slide bar 1 produces along its axial slip, and the rotation that tool housing 2 is produced around turning axle 3, the radially contact 10 that is fixed on this moment on the slide bar 1 radially produces relative motions together with the radially resistance wire 8 that is fixed on the shell 2 that is contacted, hoop contact 11 produces relative motion together with being fixed between the hoop resistance wire 9 on the round base 13 of being contacted, thereby cause the voltage variety that is used for the test electric bridge that data analysis uses, reach the purpose of carrying out the two-dimension displacement test.When slide bar 1 slides, self-equilibrating slide block 15 can produce and slide bar 1 reciprocal motion on slider waveguide rod 16, between slide bar 1 and the self-equilibrating slide block 15 get in touch can be by being connected the two backguy and and the backguy deflection sheave realize that this has just kept the instrument center of gravity all the time by its rotary middle spindle.The instrument data transmission line is drawn from circular shaft with holes 7 inside, to eliminate the influence to the instrument centre of gravity place.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (4)
1. two-dimension displacement sensor is characterized in that: comprise linear radially resistance wire and the circular arc hoop resistance wire of forming test electric bridge, both are installed to one in the structure that turning axle rotates;
Also comprise: with the radially slide bar that measuring point links to each other, it is installed in the shell of turning axle rotation; Shell is mounted fixing by rigid support and Hollow Cylindrical Shaft; Radially resistance wire and circular arc hoop resistance wire are mounted respectively on radially resistance wire pedestal and hoop resistance wire pedestal to be connected to linear in the test electric bridge, radially the resistance wire pedestal is fixed on the shell, and hoop resistance wire pedestal is fixed on the rigid support by Hollow Cylindrical Shaft; Described linear radially resistance wire and circular arc hoop resistance wire is received in the test electric bridge by resistance coil terminal box separately respectively; Radially the slide bar end is under the measured point displacement drives, can making radially, slide bar produces along its axial slip, and make shell produce rotation around turning axle, the radially contact that is fixed on the slide bar radially produces relative motion together with the radially resistance wire that is fixed on the shell that is contacted, the hoop contact produces relative motion together with being fixed between the hoop resistance wire on the hoop resistance wire pedestal of being contacted, thereby causes the change in voltage that is used for the test electric bridge that data analysis uses.
2. two-dimension displacement sensor according to claim 1 is characterized in that: also comprise data line, it is drawn from Hollow Cylindrical Shaft inside.
3. two-dimension displacement sensor according to claim 1 is characterized in that: described two-dimension displacement sensor is provided with keeps himself center of gravity dynamic self balancing device by its turning axle all the time.
4. two-dimension displacement sensor according to claim 3, it is characterized in that: described dynamic self balancing device comprises slider waveguide rod and the self-equilibrating slide block that is arranged on the slider waveguide rod, radially be connected with the backguy deflection sheave by backguy between slide bar and the self-equilibrating slide block, when radially slide bar slided, the self-equilibrating slide block produced on slider waveguide rod and the radially reciprocal motion of slide bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610026294A CN100587409C (en) | 2006-04-29 | 2006-04-29 | Method for measuring two-dimension displacement and two-dimension displacement sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610026294A CN100587409C (en) | 2006-04-29 | 2006-04-29 | Method for measuring two-dimension displacement and two-dimension displacement sensor |
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| CN101063621A CN101063621A (en) | 2007-10-31 |
| CN100587409C true CN100587409C (en) | 2010-02-03 |
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| CN200610026294A Active CN100587409C (en) | 2006-04-29 | 2006-04-29 | Method for measuring two-dimension displacement and two-dimension displacement sensor |
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| CN103673859A (en) * | 2013-12-19 | 2014-03-26 | 张国政 | Displacement sensor |
| CN105973281B (en) * | 2016-05-06 | 2018-06-12 | 东南大学 | A kind of increment type straight line rotates two-freedom position detecting device |
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| CN107421481B (en) * | 2017-07-04 | 2023-05-02 | 成都理工大学 | Three-dimensional monitoring and early warning multipoint displacement meter for measuring rock mass expansion deformation |
| CN109373880B (en) * | 2018-08-31 | 2021-04-30 | 湘潭大学 | Mountain crack monitoring and early warning system and early warning method |
| CN109186437B (en) * | 2018-10-17 | 2020-08-04 | 莆田学院 | Displacement sensor |
| CN109870109B (en) * | 2019-04-15 | 2021-05-04 | 长春理工大学 | Two-dimensional grating displacement sensor measuring device |
| CN110749271B (en) * | 2019-10-11 | 2021-12-10 | 成都飞机工业（集团）有限责任公司 | Wireless shape and position measuring device |
| CN110595427A (en) * | 2019-10-31 | 2019-12-20 | 杈惧己 | Bridge construction mounting system settlement displacement monitoring devices |
| CN113203352B (en) * | 2021-05-28 | 2023-06-23 | 重庆建新建设工程监理咨询有限公司 | Automatic monitoring system and monitoring method for foundation pit displacement |
Citations (5)
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|---|---|---|---|---|
| EP0456367A1 (en) * | 1990-05-01 | 1991-11-13 | Rover Group Limited | A displacement sensing system |
| EP0546907B1 (en) * | 1991-12-09 | 1996-03-13 | Neopost Industrie | Angular position sensor with continuous closed resistive track and measuring method therefore |
| US6253630B1 (en) * | 1998-04-15 | 2001-07-03 | Linde Aktiengesellschaft | Device to measure the rotational position of a steering wheel |
| CN1383601A (en) * | 2000-07-01 | 2002-12-04 | 罗伯特·博施有限公司 | Adjustment drive with adjustable potentiometer |
| US6956384B1 (en) * | 2004-11-05 | 2005-10-18 | Seoul National University Industry Foundation | Linear displacement transducer with improved accuracy |
-
2006
- 2006-04-29 CN CN200610026294A patent/CN100587409C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0456367A1 (en) * | 1990-05-01 | 1991-11-13 | Rover Group Limited | A displacement sensing system |
| EP0546907B1 (en) * | 1991-12-09 | 1996-03-13 | Neopost Industrie | Angular position sensor with continuous closed resistive track and measuring method therefore |
| US6253630B1 (en) * | 1998-04-15 | 2001-07-03 | Linde Aktiengesellschaft | Device to measure the rotational position of a steering wheel |
| CN1383601A (en) * | 2000-07-01 | 2002-12-04 | 罗伯特·博施有限公司 | Adjustment drive with adjustable potentiometer |
| US6956384B1 (en) * | 2004-11-05 | 2005-10-18 | Seoul National University Industry Foundation | Linear displacement transducer with improved accuracy |
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| CN101063621A (en) | 2007-10-31 |
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Assignee: Shanghai Zhubang Measure & Control and Technology Co., Ltd. Assignor: Tongji University Contract record no.: 2010310000178 Denomination of invention: Method for measuring two-dimension displacement and two-dimension displacement sensor Granted publication date: 20100203 License type: Exclusive License Open date: 20071031 Record date: 20100925 |
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Owner name: SHANGHAI ZHUBANG MEASUREMENT AND CONTROL TECHNOLOG Free format text: FORMER OWNER: TONGJI UNIVERSITY Effective date: 20110209 |
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Free format text: CORRECT: ADDRESS; FROM: 200092 NO.1239, SIPING ROAD, SHANGHAI TO: 200092 ROOM 212G, TONGJI SCIENCE AND TECHNOLOGY PARK, NO.65, CHIFENG ROAD, YANGPU DISTRICT, SHANGHAI |
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Effective date of registration: 20110209 Address after: 200092 212G room, Tongji Science and Technology Park, 65 Chifeng Road, Shanghai, Yangpu District Patentee after: Shanghai Zhubang Measure & Control and Technology Co., Ltd. Address before: 1239 Siping Road, Shanghai, No. 200092 Patentee before: Tongji University |