CN107357317B - Adjusting device and method for measuring nanoscale non-contact optical fiber sensor - Google Patents
Adjusting device and method for measuring nanoscale non-contact optical fiber sensor Download PDFInfo
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- CN107357317B CN107357317B CN201710448589.5A CN201710448589A CN107357317B CN 107357317 B CN107357317 B CN 107357317B CN 201710448589 A CN201710448589 A CN 201710448589A CN 107357317 B CN107357317 B CN 107357317B
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- optical fiber
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
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- Aviation & Aerospace Engineering (AREA)
- Automation & Control Theory (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses an adjusting device and method for measuring a nanoscale non-contact optical fiber sensor. The invention can ensure the pre-installation of the measuring range before the measurement of the nano-scale optical fiber sensor in a smaller experimental space and the accurate adjustment during the experimental measurement, so that the nano-scale optical fiber displacement sensor can reach the measuring range with the best resolution.
Description
Technical Field
The invention relates to a test device for obtaining static characteristics of a joint surface, in particular to an adjusting device and method for measuring a nanoscale non-contact optical fiber sensor.
Background
In the surface deformation measurement of the combining part of the machine tool, because the deformation of the combining surface is very small, the displacement of the combining surface under an external load is obtained by applying a nanoscale displacement sensor in the current domestic and foreign measurement. In order not to destroy the properties of the bonding surface, in the non-contact measuring method, by mounting the optical fiber sensor on a relatively stationary lower specimen, no contact occurs between the upper specimen under test and the sensor. When an external load is applied to the upper test piece, the bonding surface is loaded, the micro-convex body deforms, the deformation of the bonding surface under the external load is obtained by utilizing the optical fiber sensor to collect and transmit electric signals, and a basis is provided for further solving the rigidity of the bonding part. From the above, the installation position and the debugging of the optical fiber sensor determine the accuracy of the measurement result. In order to obtain the deformation and deformation distribution condition of the whole joint surface, in an experiment, a plurality of optical fiber sensors are arranged on the joint surface along different directions and different diameters on the same diameter to obtain the deformation of each point of the joint surface.
On one hand, the nanometer-level high-precision optical fiber sensor has high resolution, small range and high installation and adjustment requirements, the measurement result is distorted by small changes in the experimental process, and the installation and adjustment of the optical fiber sensor is firm and reliable and is convenient and adjustable when in operation. On the other hand, the surface pressure distribution and deformation distribution range of the joint surface are very small, so that the optical fiber sensors are ensured to be in the measurement range, a plurality of optical fiber sensors are arranged on the narrow joint surface, and the defect is obviously overcome by using the conventional sensor adjusting device.
The existing device for accurately adjusting the high-precision sensor adopts an adjusting frame or an adjusting table with a two-dimensional or three-dimensional screw micrometer, has relatively large structural size, and cannot meet the requirements of installation operation positions of a single optical fiber sensor at narrow positions such as a small plane, a hole and the like and simultaneous measurement of a plurality of sensors. The displacement measurement of faying face is to place test piece down on the experiment square chest, and optical fiber sensor passes through the hole installation on square chest upper portion under on the test piece, and a plurality ofly will be installed simultaneously moreover, still need to reserve the adjustment space, and current adjustment chuck can't satisfy space and adjustment space requirement. As shown in fig. 1, when the rigidity of the joint surface is detected, the deformation of the joint surface under an external load needs to be measured, in order to reduce the influence of the deformation of the upper and lower test pieces on the deformation of the joint surface, the sensor needs to be arranged at a position close to the center of the joint surface, an optical fiber sensor needs to be arranged on the lower test piece and penetrate into a hole from the lower part, in order to ensure that the appearance of the joint surface is not damaged as much as possible, the diameter of the optical fiber probe is very small, the minimum diameter is only 0.17mm, and the aperture of the corresponding sensor on the lower test piece is; the range of the nanoscale optical fiber sensor is small, the position of the optical fiber sensor needs to be adjusted to the range before measurement, if the optical fiber sensor is directly installed and inserted into the through hole, the distance from the head of the optical fiber sensor to the joint surface can be ensured only by manually controlling the insertion depth of the optical fiber sensor, the distance of the section cannot be accurately controlled, the distance measurement surface is ensured to be within the range, and the sensor head can be damaged if the optical fiber sensor is directly adjusted for multiple times. The existing adjusting device cannot realize pre-adjustment before experimental assembly so as to meet the requirement of micro-range.
Disclosure of Invention
The invention aims to provide an adjusting device and an adjusting method for measuring a nanoscale non-contact optical fiber sensor, which are used for overcoming the problems in the prior art, and can ensure the pre-installation of a measuring range and the accurate adjustment during experimental measurement before the measurement of the nanoscale optical fiber sensor in a smaller experimental space, so that the nanoscale optical fiber displacement sensor can reach the measuring range with the optimal resolution.
In order to achieve the purpose, the invention adopts the following technical scheme:
adjusting device for measuring of nanometer non-contact optical fiber sensor, including adjusting nut, adjusting nut lower part interlude is equipped with optical fiber sensor, and upper portion interlude is equipped with the dead lever, and optical fiber sensor installs in the dead lever through the hole of dead lever below, and the upper portion cover of dead lever is equipped with clamping screw, and clamping screw's the lower part outside passes through threaded connection with adjusting nut's upper portion inboard.
Furthermore, the upper part of the fixing screw is connected with a fine adjustment barrel, the upper part of the fine adjustment barrel is connected with an adjustment sleeve, and the adjustment sleeve is connected with an adjustment cover.
Further, the total length of the fine adjustment cylinder is 1mm smaller than the height of the lower test piece.
Further, the lower portions of the optical fiber sensor and the adjusting nut are disposed in the support block.
Further, a spring is arranged between the bottom of the fixing screw rod and the fixing rod.
Further, the optical fiber sensor is fixed with the fixing rod through a set screw.
An adjusting method of an adjusting device for measuring a nanoscale non-contact optical fiber sensor comprises the following steps:
the method comprises the following steps: adjusting the fixing screw to push the fine adjustment cylinder, the adjustment sleeve and the adjustment cover, so that the distance between the top of the optical fiber sensor and the adjustment cover reaches a measuring range;
step two: the fine adjustment cylinder, the adjustment sleeve, the adjustment cover and the support block are removed, the fixing screw is fixed at the lower surface measuring position of the lower test piece, after the upper test piece is stably installed, the fixing screw is adjusted to enable the adjustment nut to drive the fixing rod to move upwards, and then the optical fiber sensor is driven to move upwards, so that the optical fiber sensor reaches a high-resolution area of a measuring range.
Compared with the prior art, the invention has the following beneficial technical effects:
when the device is used, the adjusting device provided with the optical fiber sensor is integrally arranged at the measuring position of the lower test piece, the fixing screw rod is fixed on the lower surface of the lower test piece through the screw, and in a test, after the upper test piece is stably arranged, the special fine thread between the adjusting nut and the fixing screw rod is adjusted, so that the optical fiber sensor axially moves to reach a high-resolution area of a measuring range, and the displacement measured in the test is more accurate.
Furthermore, before the high-precision optical fiber displacement sensor is arranged on the upper test piece, in order to ensure that the optical fiber displacement sensor is in a measuring range when being arranged on a combining surface, the whole is arranged on a supporting block with certain weight and high precision, a fine adjustment cylinder is additionally arranged at the upper part, an adjustment sleeve and an adjustment cover are additionally arranged above the fine adjustment cylinder, and the distance between the optical fiber displacement sensor and the adjustment cover reaches the measuring range by adjusting a fixing screw rod.
Furthermore, the spring is additionally arranged between the bottom of the fixed screw rod and the fixed rod so as to eliminate thread gaps.
Drawings
FIG. 1 is a partial structural diagram of an installation condition of an optical fiber sensor during measurement;
FIG. 2 is a schematic view of an adjusting device of an optical fiber sensor according to the present invention;
FIG. 3 is a schematic diagram of an optical fiber pre-assembly range adjustment structure according to the present invention;
FIG. 4 is a schematic view of a pre-assembled span adjustment top of the present invention;
FIG. 5 is a schematic view of the arrangement structure of the working positions of the optical fiber sensor and the adjustment device of the present invention.
In the figure, 1, a supporting block, 2, an adjusting nut, 3, an optical fiber sensor, 4, a fixing rod, 5, a spring, 6, a fixing screw rod, 7, a fine adjustment barrel, 8, an adjusting sleeve, 9, an adjusting cover, 10, a set screw, 11, an upper test piece, 12, a lower test piece and 13, a joint surface are arranged.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 to 5, the adjusting device for measuring the nanoscale non-contact optical fiber sensor comprises an adjusting nut 2, an optical fiber sensor 3 is inserted into the lower part of the adjusting nut 2, a fixing rod 4 is inserted into the upper part of the adjusting nut, the optical fiber sensor 3 is arranged in the fixed rod 4 through a hole below the fixed rod 4, the optical fiber sensor 3 is fixed with the fixed rod 4 through a set screw 10, the upper part of the fixed rod 4 is sleeved with a fixed screw 6, and the outer side of the lower part of the fixing screw 6 is connected with the inner side of the upper part of the adjusting nut 2 through threads, a spring 5 is arranged between the bottom of the fixing screw 6 and the fixing rod 4, the upper part of the fixing screw 6 is connected with a fine adjustment barrel 7, the upper part of the fine adjustment barrel 7 is connected with an adjusting sleeve 8, the adjusting sleeve 8 is connected with an adjusting cover 9, the total length of the fine adjustment barrel 7 is 1mm smaller than the height of a lower test piece 12, and the lower parts of the optical fiber sensor 3 and the adjusting nut 2 are arranged in the supporting block 1.
An adjusting method of an adjusting device for measuring a nanoscale non-contact optical fiber sensor comprises the following steps:
the method comprises the following steps: adjusting the fixing screw 6 to push the fine adjustment cylinder 7, the adjustment sleeve 8 and the adjustment cover 9, so that the distance between the top of the optical fiber sensor 3 and the adjustment cover 9 reaches a range;
step two: the fine adjustment cylinder 7, the adjustment sleeve 8, the adjustment cover 9 and the support block 1 are removed, the fixing screw 6 is fixed at the lower surface measuring position of the lower test piece 12, after the upper test piece 11 is stably installed, the fixing screw 6 is adjusted to enable the adjusting nut 2 to drive the fixing rod 4 to move upwards, and then the optical fiber sensor 3 is driven to move upwards, so that the optical fiber sensor 3 reaches a high-resolution area of a measuring range.
The following is a detailed description of the operation of the present invention:
as shown in fig. 2, before the high-precision optical fiber displacement sensor is mounted on the test piece, in order to ensure that the optical fiber sensor 3 is within the range of measurement range when mounted on the junction surface 13, the optical fiber sensor 3 is firstly inserted into the hole below the adjusting nut 2, the fixing rod 4 is inserted into the hole above the adjusting nut 2, the optical fiber sensor 3 is mounted in the fixing rod 4 through the hole below the fixing rod 4, and the fixing of the optical fiber sensor 3 and the fixing rod 4 is realized by the set screw 10; the connected fixing rod 4 and the optical fiber sensor 3 pass through a hole of the fixing screw rod 6, the fixing screw rod 6 is in threaded connection with the adjusting nut 2, and a spring 5 is additionally arranged between the fixing rod 4 and the fixing screw rod 6 to eliminate thread gaps. The thread ridge between the adjusting nut 2 and the fixing screw 6 is a fine pitch thread which ensures the adjustment of the special processing, so as to ensure the accurate adjustment during the range adjustment. After the optical fiber sensor 3 is initially installed, as shown in fig. 3, the adjusting nut 2 is installed on the supporting block 1, a fine adjustment cylinder 7 is installed on a probe reserved outside the optical fiber sensor 3, the total length of the fine adjustment cylinder 7 is adjusted according to the height of a lower test piece 12 and is 1mm smaller than the lower test piece 12, the position of the optical fiber sensor 3 is initially adjusted to enable the fine adjustment cylinder 7 to be exposed above the probe, an adjusting sleeve 8 and an adjusting cover 9 are additionally installed above the fine adjustment cylinder 7, then the position of the fixing screw 6 on the optical fiber sensor 3 is adjusted to enable the optical fiber sensor 3 to reach a measuring range, and as shown in fig. 4, a partial view between the optical fiber probe and the upper surface is obtained after the.
Then the fine tuning cylinder 7, the adjusting sleeve 8 and the adjusting cover 9 are taken down from the device with the adjusted range, the supporting block 1 is removed, as shown in fig. 5, the optical fiber sensor 3 passes through a hole below the lower test piece 12, the upper thread of the fixing screw 6 is screwed into a threaded hole at the lower end of the hole of the lower test piece 12 until the fixing screw 6 contacts with the lower surface of the lower test piece 12, the fixing screw 6 is fixed on the lower test piece 12, and then the optical fiber sensor 3 is accurately adjusted by rotating the specially processed fine thread with the tiny thread pitch between the adjusting nut 2 and the fixing screw 6, so that the high-resolution range of the sensor is ensured.
Claims (4)
1. The adjusting device for measuring the nanoscale non-contact optical fiber sensor is characterized by comprising an adjusting nut (2), wherein the lower part of the adjusting nut (2) is inserted with the optical fiber sensor (3), the upper part of the adjusting nut is inserted with a fixing rod (4), the optical fiber sensor (3) is installed in the fixing rod (4) through a hole below the fixing rod (4), the upper part of the fixing rod (4) is sleeved with a fixing screw rod (6), and the outer side of the lower part of the fixing screw rod (6) is in threaded connection with the inner side of the upper part of the adjusting nut (2); the upper part of the fixed screw (6) is connected with a fine adjustment cylinder (7), the upper part of the fine adjustment cylinder (7) is connected with an adjustment sleeve (8), and the adjustment sleeve (8) is connected with an adjustment cover (9); the total length of the fine tuning cylinder (7) is 1mm less than the height of the lower test piece (12); the lower parts of the optical fiber sensor (3) and the adjusting nut (2) are arranged in the supporting block (1).
2. The adjusting device for measuring the non-contact optical fiber sensor of nanometer level as claimed in claim 1, characterized in that a spring (5) is provided between the bottom of the fixing screw (6) and the fixing rod (4).
3. The adjustment device for measuring of the non-contact fiber optic sensor of nanometer level as claimed in claim 1, characterized in that, the fiber optic sensor (3) is fixed with the fixing rod (4) by the set screw (10).
4. An adjustment method of the adjustment device for measuring the nanoscale non-contact optical fiber sensor according to claim 1, comprising the steps of:
the method comprises the following steps: adjusting the fixing screw (6) to push the fine adjustment cylinder (7), the adjustment sleeve (8) and the adjustment cover (9) so that the distance between the top of the optical fiber sensor (3) and the adjustment cover (9) reaches a measuring range;
step two: the fine adjustment barrel (7), the adjustment sleeve (8), the adjustment cover (9) and the supporting block (1) are removed, the fixing screw (6) is fixed at the lower surface measuring position of the lower test piece (12), after the upper test piece (11) is installed stably, the fixing screw (6) is adjusted to enable the adjusting nut (2) to drive the fixing rod (4) to move upwards, and then the optical fiber sensor (3) is driven to move upwards, so that the optical fiber sensor (3) reaches a high-resolution area of a measuring range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710448589.5A CN107357317B (en) | 2017-06-14 | 2017-06-14 | Adjusting device and method for measuring nanoscale non-contact optical fiber sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710448589.5A CN107357317B (en) | 2017-06-14 | 2017-06-14 | Adjusting device and method for measuring nanoscale non-contact optical fiber sensor |
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| Publication Number | Publication Date |
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| CN107357317A CN107357317A (en) | 2017-11-17 |
| CN107357317B true CN107357317B (en) | 2020-06-09 |
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| CN201710448589.5A Active CN107357317B (en) | 2017-06-14 | 2017-06-14 | Adjusting device and method for measuring nanoscale non-contact optical fiber sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114136224B (en) * | 2021-11-04 | 2023-03-28 | 西安交通大学 | Wide-range optical fiber sensing probe for measuring motor air gap |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101178395A (en) * | 2007-12-05 | 2008-05-14 | 中国科学院武汉岩土力学研究所 | Non-contact type rock three-way shrinkage test device and test method |
| CN101788268A (en) * | 2010-03-17 | 2010-07-28 | 合肥工业大学 | Ultra-precise fiber grating displacement sensor |
| CN202126256U (en) * | 2011-06-27 | 2012-01-25 | 北京耐尔仪器设备有限公司 | Contactless displacement measurement device |
| CN202149757U (en) * | 2011-08-11 | 2012-02-22 | 齐齐哈尔大学 | High accuracy non-contact fiber detection apparatus for micro-displacement |
-
2017
- 2017-06-14 CN CN201710448589.5A patent/CN107357317B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101178395A (en) * | 2007-12-05 | 2008-05-14 | 中国科学院武汉岩土力学研究所 | Non-contact type rock three-way shrinkage test device and test method |
| CN101788268A (en) * | 2010-03-17 | 2010-07-28 | 合肥工业大学 | Ultra-precise fiber grating displacement sensor |
| CN202126256U (en) * | 2011-06-27 | 2012-01-25 | 北京耐尔仪器设备有限公司 | Contactless displacement measurement device |
| CN202149757U (en) * | 2011-08-11 | 2012-02-22 | 齐齐哈尔大学 | High accuracy non-contact fiber detection apparatus for micro-displacement |
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