CN114087971A - Stay wire displacement sensor - Google Patents
Stay wire displacement sensor Download PDFInfo
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- CN114087971A CN114087971A CN202111395958.1A CN202111395958A CN114087971A CN 114087971 A CN114087971 A CN 114087971A CN 202111395958 A CN202111395958 A CN 202111395958A CN 114087971 A CN114087971 A CN 114087971A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 48
- 230000008859 change Effects 0.000 claims abstract description 8
- 238000004026 adhesive bonding Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000004677 Nylon Substances 0.000 description 5
- 229920001778 nylon Polymers 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a stay wire displacement sensor, which relates to the field of sensors and is used for measuring the displacement of an object, and the stay wire displacement sensor comprises: the device comprises a shell, a measuring wire, a cantilever beam, a strain gauge and an amplifying circuit. When the object to be measured displaces, the displacement is transmitted to the free end of the cantilever beam in the shell by the measuring line and causes the cantilever beam to deform, so that the resistance value of the strain gauge on the cantilever beam changes, and the amplifying circuit measures the change of the resistance value and outputs an electric signal according to a certain form and amplitude. The stay wire displacement sensor has the advantages of simple structure, light weight and good dynamic performance, and is suitable for measuring small and complex displacement.
Description
Technical Field
The invention relates to the field of sensors, in particular to a stay wire displacement sensor.
Background
The stay wire displacement sensor is also called as a stay wire displacement sensor, and is called as a stay wire sensor or a stay wire sensor for short. The inside of the sensor is provided with a measuring line led out through an opening of the sensor shell. The connecting end of the measuring wire is fixed on the measured object, and when the measured object is displaced, the measuring wire is pulled out. Meanwhile, the length of the measuring wire pulled out is converted into an electric signal by the sensor, so that the displacement information of the measured object is fed back. Because the measuring line has flexibility, the stay wire sensor can flexibly measure the displacement of objects under various movements.
The structure of the existing pull wire sensor mainly comprises: the device comprises a shell, a wire spool, an angle sensor, a measuring wire, a coil spring and an amplifying circuit. Wherein, the shell is provided with a wire passing hole; the wire spool is arranged in the shell through a rotating shaft and can rotate along the rotating shaft; the angle sensor is usually a potentiometer or an encoder and is connected with the rotating shaft of the wire spool; the measuring wire is wound on the wire spool, and one end of the measuring wire is led out of the shell through the opening of the shell; a coil spring is mounted between the spool and the housing for applying a torque to the spool to maintain the measuring wire in tension. The working principle is as follows: the object to be measured moves, the measuring wire is pulled out, the coil spring elasticity is overcome, the wire spool is driven to rotate, the rotation angle of the wire spool is converted into an electric signal by the angle sensor and the amplifying circuit, and the electric signal is output according to the required form and range. The measuring range of the existing pull wire sensor can be very long because the measuring wire is wound on the wire spool.
In practical applications, the pull sensor is mainly used for measuring the displacement of a component with a relatively simple action, such as a hydraulic cylinder, an air cylinder, a guide rail screw rod, and the like, but with a relatively long working stroke. In this case, the existing pull wire sensor can satisfy the demand. However, many small and complicated displacements of various multi-degree-of-freedom robots including soft robots need to be measured, and many pull-wire sensors need to be arranged. In this case, when the conventional pull-wire sensor is used, the advantage of the range cannot be obtained, but the system is too heavy and unacceptable because the pull-wire sensor occupies too much weight and volume.
A strain gauge is a sheet-like resistive element used to measure strain. When the resistance value of the resistor is mechanically deformed under the action of external force, the resistance value of the resistor changes. This change can be converted by the amplification circuit into various forms of signals, typically into voltage signals. When the strain gauge is used, the strain gauge is adhered to the surface of an object to be measured, and when the adhered part of the object to be measured is strained, the strain gauge is mechanically deformed, so that the resistance value is changed, and the resistance value is converted into an electric signal in a required form by the amplifying circuit.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a stay wire displacement sensor, which solves the problem that the existing stay wire displacement sensor is difficult to arrange on a multi-degree-of-freedom robot in a large quantity due to excessive weight or volume.
(II) technical scheme
In order to achieve the purpose, the technical scheme of the invention is as follows: a stay wire displacement sensor comprises a shell, a cantilever beam, a strain gauge, a measuring wire and an amplifying circuit. Wherein, the shell is provided with a wire passing hole; the cantilever beam is arranged in the shell, the fixed end is fixedly connected with the shell, and the free end is connected with the measuring line; the strain gauge is adhered to the cantilever beam; one end of the measuring wire is led out of the shell through the wire passing hole on the shell.
The cantilever beam and the shell can be integrally formed by means of a 3D printing method, or can be manufactured respectively, and then the fixed support end of the cantilever beam is connected to the shell through methods such as threads, gluing, forming and the like.
The cantilever beam is made of a material with good elasticity, can be made of a metal material or a high polymer material, and is recommended to be made of spring steel or nylon.
The cantilever beam may be of various cross-sections, but preferably has a small product of inertia in the direction of deformation with the line of measurement, so that the free end of the cantilever beam is subjected to a small force to produce a large displacement, and a large product of inertia in the direction perpendicular to the deformation, so that the deformation of the cantilever beam is confined in a plane. Therefore, the cross-section of the cantilever beam is preferably rectangular. Besides designing the cross-sectional shape, the cantilever beam can be limited by providing a guide groove or the like so that the deformation thereof occurs in one plane.
The projection of the cantilever beam neutral plane can be a straight line, and also can be a curve or a combination of the straight line and the curve. The design is mainly that the track swept by the free end of the cantilever beam pulled by the measuring wire can be approximately regarded as a straight line pointing to the wire through hole.
For the arrangement of the measuring line, one end of the measuring line can be directly fixed at the free end of the cantilever beam in one or more of the modes of screw thread, buckle, knot, gluing and the like, and the other end of the measuring line is led out through the line passing hole of the shell; one end of the movable pulley can also be fixed beside the wire passing hole of the shell, firstly passes through the opening at the free end of the cantilever beam, and then is turned back to pass through the wire passing hole of the shell to be led out, so that a movable pulley structure is formed, the stroke is increased, and the tension on the measuring wire is reduced.
Strain gages are known in the art. The amount of strain that can be measured by strain gauges is limited, and for example, with BF350-3AA strain gauges, the maximum strain that can be measured is approximately 2%. Therefore, the strain amount of the cantilever beam at the position where the strain gauge is attached cannot exceed the measurement range of the strain gauge. In view of the undesirable tendency of the strain gage to move substantially with the cantilever beam, the strain gage is preferably affixed proximate the cantilevered beam anchor end. The cantilever beam can be attached with a strain gauge with a widened section so as to attach the strain gauge and limit the strain amount.
Only one temperature self-compensation strain gauge can be pasted on the cantilever beam, and a group of strain gauges can be pasted on the cantilever beam, and the temperature compensation can be realized through a bridge circuit method.
The leading-out end of the measuring wire is provided with a clamping head to prevent the wire end from accidentally retracting into the shell. The cartridge may have an opening therein for mounting on an object to be tested.
A limiting block can be arranged in the shell to limit the maximum deformation of the cantilever beam, namely the maximum length of the measuring wire pulled out.
A limiting block can be arranged in the shell to limit the minimum deformation of the cantilever beam, namely the minimum length of the measuring wire pulled out when the tension is maintained on the measuring wire.
The amplifier circuit belongs to the prior art. And pulling the measuring wire, wherein the measuring wire extends out for a certain length, and simultaneously the cantilever beam is deformed to cause the change of the resistance value of the strain gauge. The amplifying circuit amplifies the change of the resistance value of the strain gauge and outputs an electric signal according to a required form and amplitude.
The cantilever beam maintains the tension on the measuring line due to the elastic force generated by the elastic deformation, so that the measuring line is kept tensioned.
A group of measuring ropes, a cantilever beam and a strain gauge can be arranged in one shell to form a single stay wire displacement sensor capable of measuring one displacement, and a plurality of groups of measuring ropes, cantilever beams and strain gauges can be arranged to form a multi-path stay wire displacement sensor capable of measuring a plurality of displacements.
(III) advantageous effects
Compared with the prior art, the invention has the following advantages:
1. because the cantilever beam-strain gauge structure is used for replacing a wire reel-encoder (or potentiometer) -torsion spring structure, a shaft system is omitted, and the sensor has small volume, light weight and compact structure.
2. When the tension of the measuring line is constant, the inertia of the cantilever beam structure is smaller than that of the wire reel-torsion spring structure, and even if the measured object is accelerated and decelerated suddenly, the cantilever beam structure can well follow up, so that the dynamic performance of the sensor provided by the invention is better.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic overall appearance diagram of the one-way stay wire displacement sensor of the present invention.
Fig. 2 is a schematic view of the internal structure of the one-way stay wire displacement sensor of the present invention.
Fig. 3 is a schematic overall appearance diagram of the multi-way stay wire displacement sensor of the invention.
Fig. 4 is a schematic diagram of the internal structure of the multi-way stay wire displacement sensor of the invention.
Fig. 5 is a schematic diagram of the internal structure of the multi-way stay wire displacement sensor of the invention.
Fig. 6 is a top view of the internal structure of the multiple stay wire displacement sensor of the present invention.
Fig. 7 is a schematic view of the cantilever beam of the multi-path wire displacement sensor of the present invention.
Wherein: 1-shell, 2-measuring line, 3-cantilever beam and 4-strain gauge; 11-a shell mounting hole, 12-a line-passing hole of a measuring line on the shell, 13-a square column for mounting a cantilever beam on the shell of the multi-path stay wire displacement sensor, and 14-an opening for mounting a fixed end of the measuring line on the shell of the multi-path stay wire displacement sensor; 21-a chuck of a measuring line measuring end, and 22-a line end of the measuring line at one side of the sensor; 31-the fixed end of the cantilever beam, 32-the pasting position of the strain gage on the cantilever beam, and 33-the free end of the cantilever beam.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only individual embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
The invention aims to provide a stay wire displacement sensor, which solves the problem that the existing stay wire displacement sensor is difficult to arrange on a multi-degree-of-freedom robot in a large quantity due to excessive weight or volume. The device has the advantages of small volume, light weight, compact structure and good dynamic performance.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Embodiment mode 1:
the present embodiment will be described below with reference to fig. 1-2. The present embodiment specifically describes a one-way stay wire displacement sensor having one measuring string that can measure one displacement amount.
As shown in fig. 1, the housing 1 and the measuring string 2 of the present embodiment are visible from the outside. Wherein, the shell 1 is provided with a mounting hole 11; the measuring rope 2 has a chuck 21 at the end, and the chuck 21 is provided with a mounting hole 211. The material of the shell 1 is PLA, the thickness is 2mm, and the maximum size of the shape is 125mm multiplied by 120mm multiplied by 12 mm; the measuring line 2 is a nylon line with a line diameter of 0.7 mm. In use, the housing 1 and the cartridge 21 are secured to a reference object and a measured object through the respective mounting holes 11 and 211.
As shown in fig. 2, the present embodiment includes a cantilever beam 3 and a strain gauge 4 in addition to the housing 1 and the measuring string 2. Wherein, the fixed end 31 of the cantilever beam 3 is fixed on the shell; the strain gauge pasting position 32 of the cantilever beam is widened and is used for pasting the strain gauge 4; a thin column protrudes from the free end 33 for connecting the measuring line 2. The strain gauge 4 is fixed on the cantilever beam in a gluing way, and an amplifying circuit of the strain gauge is omitted. The other end 22 of the measuring wire 2, except the end where the clamp 21 is located, is wound, knotted and glued on the protruding thin column of the free end 33 of the cantilever beam 3, and the other end is led out of the sensor through the opening 12 of the housing 1 and is limited outside the sensor by the clamp 21.
The basic shape of the cantilever beam 3 is a curve formed by tangency of a straight line and a 90-degree circular arc, the length of the straight line is 40mm, and the radius of the circular arc is 40 mm. The cantilever beam 3 has a rectangular cross section with a width of 2mm and a height of 1 mm. To match the size and span of the strain gage, the cross-sectional width of the cantilever beam 3 at the strain gage attachment location 32 is increased to 5 mm. The lower side of the strain gauge attaching position 32 is spaced from the case by 1 mm. The cantilever beam 3 and the housing 1 of the embodiment are integrally formed through 3D printing, and the fixed end 31 of the cantilever beam is actually a protruding structure of the housing 1, so that the cantilever beam and the housing do not need to be assembled.
The type of the strain gauge 4 is BF350-3AA, and the strain gauge is glued at the strain gauge sticking position 32 of the cantilever beam 3. The amplifying circuit (not shown in the figure) connected with the strain gauge 4 converts the change of the resistance value of the strain gauge 4 into a voltage signal with the amplitude of 3-4V. The amplifying circuit belongs to the prior art, and the embodiment is not described.
The present embodiment gives a sensor measuring range of 80mm, a weight of about 30 g, and dimensions of the reference housing 1 of 125 x 120 x 12 mm. When the measuring wire is pulled out to the maximum length, the cantilever beam is deformed so that the tension generated on the measuring wire does not exceed 0.5N. The range of the sensor is limited by the deformation of the cantilever beam, but is independent of the length of the measuring line. Therefore, the length of the measuring line can be arbitrary, which means that the sensor proposed by the present invention can measure the displacement from the measured object at different distances, either near or far, by adjusting the length of the measuring line.
Embodiment mode 2:
this embodiment will be described below with reference to fig. 3 to 7. The present embodiment specifically describes a three-way stay wire displacement sensor having three measuring cords, which can measure three displacement amounts.
As shown in fig. 3, the case 1 and the three measuring cords 2 of the present embodiment are seen from the outside. Wherein, the shell 1 is provided with a mounting hole 11; the tail end of the measuring rope 2 is provided with a clamping head 21, the clamping head 21 is provided with a mounting hole 211, and the other end 22 of the measuring rope 2 is fixed on the shell. The shell 1 is made of nylon, the thickness of the shell is 3mm, and the maximum size of the outer shape of the shell is 100mm multiplied by 90mm multiplied by 26 mm; the measuring line 2 is a nylon line having a line diameter of 0.5 mm. In use, the housing 1 and the cartridge 21 are secured to a reference object and a measured object through the respective mounting holes 11 and 211.
As shown in fig. 4-7, this embodiment includes a cantilever beam 3 and a strain gauge 4 in addition to a housing 1 and a measuring string 2. Unlike embodiment 1, the cantilever beam 3 and the housing 1 in this embodiment are separately processed and assembled. Wherein, the three cantilever beams 3 are stacked on the square column 13 of the housing 1 through the square hole 311 of the fixed end 31; the strain gauge pasting position 32 of the cantilever beam is widened and is used for pasting the strain gauge 4; the free end 33 of the cantilever beam 3 is provided with an opening and a thin cylinder for connecting the measuring rope 2. The strain gauge 4 is fixed on the cantilever beam in a gluing way, and an amplifying circuit of the strain gauge is omitted. The measuring wire 2 is passed from outside the housing 1 through the opening 14 into the interior of the housing, leaving the wire end 22 adhesively secured to the opening 14; after entering the shell 1, the measuring wire 2 passes through the opening of the cantilever beam 3 at the free end 33 and then turns back around the thin cylinder, and is led out of the shell through the opening 12; after being drawn out of the housing 1, a chuck 21 is installed at the end of the measuring wire to prevent the wire end from being retracted into the sensor. In this way, as shown in fig. 6, the measuring line 2 and the free end 33 of the cantilever beam 3 form a structure similar to a movable pulley, and the functions of increasing the measuring range and reducing the tension on the measuring line are achieved.
The basic shape of the cantilever beam 3 is a curve formed by tangency of a straight line and a 90-degree arc, the length of the straight line is 20mm, and the radius of the arc is 20 mm. The cantilever beam 3 has a rectangular cross section with a width of 3mm and a height of 1 mm. To match the size and span of the strain gage, the cross-sectional width of the cantilever beam 3 at the strain gage attachment location 32 is increased to 5 mm. The distance between the lower part of the strain gauge pasting position 32 and the adjacent cantilever beam or shell is 1 mm. The fixed end 31 of the cantilever beam 3 has the size of 15mm multiplied by 6mm, and is provided with a square hole 311 of 8 mm. The cantilever beam 3 and the housing 1 of the present embodiment are made of nylon materials.
The type of the strain gauge 4 is BF350-3AA, and the strain gauge is glued at the strain gauge sticking position 32 of the cantilever beam 3. The amplifier circuit (not shown) connected to the circuit converts the change of the resistance value of the strain gauge 4 into a digital signal in the range of 0-255. The amplifying circuit belongs to the prior art, and the embodiment is not described.
The present embodiment gives a sensor measuring range of 60mm, a weight of about 60 grams, and dimensions of the reference housing 1 of 100 x 90 x 26 mm. When the measuring wire is pulled out to the maximum length, the cantilever beam is deformed so that the tension generated on the measuring wire does not exceed 0.4N. The range of the sensor is limited by the deformation of the cantilever beam, but is independent of the length of the measuring line. Therefore, the length of the measuring line can be arbitrary, which means that the sensor proposed by the present invention can measure the displacement from the measured object at different distances, either near or far, by adjusting the length of the measuring line.
Although embodiments of the present invention have been described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A stay wire displacement sensor is characterized in that: the device comprises a shell (1), a measuring line (2), a cantilever beam (3) and a strain gauge (4); the measuring device comprises a shell (1), a wire passing hole (11) is formed in the shell (1), a measuring end (21) of a measuring wire (2) is led out of the shell through the wire passing hole (11) from the inside of the shell (1) and is used for being connected with a measured object, a non-measuring end (22) of the measuring wire (2) is fixed on a free end (31) of the shell (1) or a cantilever beam (3), the measuring wire (2) is connected with the free end (31) of the cantilever beam (3), the cantilever beam (3) is arranged in the shell (1), a fixed end (32) of the cantilever beam (3) is fixedly connected with the shell (1), and a strain gauge (4) is adhered to a strain gauge adhering part (33) of the cantilever beam (3).
2. A pull-wire displacement sensor according to claim 1, wherein: the device also comprises an amplifying circuit (5) which is used for amplifying the resistance value change of the strain gauge (4) and converting the resistance value change into a voltage signal or a digital signal for output.
3. A pull-wire displacement sensor according to claim 2, wherein: the measuring end (21) of the measuring wire (2) is provided with a clamping head to prevent the measuring end from withdrawing into the shell (1) from the wire through hole (11).
4. A pull-wire displacement sensor according to claim 3, wherein: a group of measuring lines (2), a cantilever beam (3) and a strain gauge (4) can be arranged in one shell (1) and used for measuring one-path displacement, and a plurality of groups of measuring lines (2), cantilever beams (3) and strain gauges (4) can also be arranged and used for measuring multi-path displacement.
5. The sensor of claim 4, wherein: the shell (1) and the cantilever beam (3) can be integrally processed, or the cantilever beam (3) can be respectively processed firstly and then assembled on the shell (1) at the fixed end (32) of the cantilever beam (3) through one or more of the methods of thread, gluing, forming and the like.
6. A pull-wire displacement sensor according to claim 5, wherein: the non-measuring end (22) of the measuring wire (2) is fixed on the free end (31) of the cantilever beam (3), and the measuring end (21) is led out of the shell (1) through the wire passing hole (11) of the shell (1) and then is provided with a chuck.
7. A pull-wire displacement sensor according to claim 5, wherein: the non-measuring end (22) of the measuring wire (2) is fixed beside the wire passing hole (11) on the shell (1), the measuring wire is folded back after passing through the free end (31) of the cantilever beam (3) and bypassing the cylindrical structure on the free end, and the clamping head is installed after being led out of the shell (1) through the wire passing hole (11) of the shell (1).
8. The sensor of claim 7, wherein: the non-measuring end (22) of the measuring wire (2) passes through the opening (12) beside the wire passing hole (11) of the shell (1) and then is fixed by gluing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111395958.1A CN114087971A (en) | 2021-11-23 | 2021-11-23 | Stay wire displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111395958.1A CN114087971A (en) | 2021-11-23 | 2021-11-23 | Stay wire displacement sensor |
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| Publication Number | Publication Date |
|---|---|
| CN114087971A true CN114087971A (en) | 2022-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111395958.1A Pending CN114087971A (en) | 2021-11-23 | 2021-11-23 | Stay wire displacement sensor |
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| CN (1) | CN114087971A (en) |
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2021
- 2021-11-23 CN CN202111395958.1A patent/CN114087971A/en active Pending
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|---|---|---|---|---|
| JP2007309723A (en) * | 2006-05-17 | 2007-11-29 | Kandenko Co Ltd | Pipeline shape measuring instrument for buried pipe, and pipeline shape measuring method using the same |
| CN201138191Y (en) * | 2007-12-25 | 2008-10-22 | 胡敬礼 | Novel multi-point displacement sensor |
| CN202092621U (en) * | 2011-04-25 | 2011-12-28 | 胡敬礼 | Stay wire displacement sensor |
| WO2016169485A1 (en) * | 2015-04-23 | 2016-10-27 | 山东大学 | Circumferentially-identifiable inclinometer sensor based on fiber grating |
| CN206146385U (en) * | 2016-09-13 | 2017-05-03 | 燕山大学 | Stay cord formula wide -range fiber grating displacement sensor |
| CN112747842A (en) * | 2020-12-22 | 2021-05-04 | 浙江理工大学 | Composite stress sensor applying nonlinear elastic modulus material and detection method |
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| Title |
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| 李伟;李川;: "双悬臂梁式光纤Bragg光栅位移传感器", 微计算机信息, no. 03 * |
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