CN113048892A - Stay wire type displacement meter and measuring device thereof - Google Patents
Stay wire type displacement meter and measuring device thereof Download PDFInfo
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- CN113048892A CN113048892A CN202110441260.2A CN202110441260A CN113048892A CN 113048892 A CN113048892 A CN 113048892A CN 202110441260 A CN202110441260 A CN 202110441260A CN 113048892 A CN113048892 A CN 113048892A
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- optical
- outer protective
- protective shell
- sliding
- connecting assembly
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 37
- 230000003287 optical effect Effects 0.000 claims abstract description 51
- 230000001681 protective effect Effects 0.000 claims abstract description 29
- 239000013307 optical fiber Substances 0.000 claims abstract description 24
- 230000001427 coherent effect Effects 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 13
- 238000010168 coupling process Methods 0.000 claims description 13
- 238000005859 coupling reaction Methods 0.000 claims description 13
- 238000010183 spectrum analysis Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
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Classifications
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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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to a stay wire type displacement meter and a measuring device thereof, belonging to the technical field of optics and comprising an outer protective shell; the measuring device is fixedly arranged on the outer protective shell and is a coherent optical device; and the connecting assembly is arranged in the outer protective shell in a sliding manner, one end of the connecting assembly is connected with the measuring instrument, and the other end of the connecting assembly penetrates through the outer protective shell and is in sliding connection with the outer protective shell. The optical fiber displacement meter adopts the principle of optical fiber coherent optics as the optical fiber displacement meter, can fully exert the advantage of distance measurement of the optical fiber coherent sensor, and realizes the miniaturization of the structure and the convenient installation in the industrial application field; the displacement is measured in a non-contact mode through the optical fiber, so that the optical fiber cannot be broken and cannot vibrate in the using process, and the long-term reliability of the displacement sensor is realized.
Description
Technical Field
The invention relates to the technical field of optics, in particular to a stay wire type displacement meter and a measuring device thereof.
Background
Non-contact, high precision absolute distance measurement techniques are widely used in metrology and industrial applications.
Most of the existing coherent optical ranging systems are interference light paths built by a lens system, and an additional wavelength positioner is needed when high-precision measurement is realized.
The existing displacement meter has the defect that a reflector is required to be installed on a measurement target.
Disclosure of Invention
The present invention is directed to a pull-wire type displacement meter and a measuring device thereof, which solve the problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a stay wire type displacement meter and an outer protective shell;
the measuring device is fixedly arranged on the outer protective shell and is a coherent optical device;
the connecting assembly is arranged in the outer protective shell in a sliding mode, one end of the connecting assembly is connected with the measuring instrument, the other end of the connecting assembly penetrates through the outer protective shell and is connected with the outer protective shell in a sliding mode, and the connecting assembly is arranged in the outer protective shell in a sliding mode
The connecting assembly includes:
one end of the sliding rod is connected with the measuring instrument, and the other end of the sliding rod penetrates through the outer protective shell and is in sliding connection with the outer protective shell;
the end part flange is sleeved outside the sliding rod in a sliding manner and is fixedly arranged outside the outer protection shell.
The present invention also provides a measuring apparatus comprising:
a scanning light source for generating scanning light having a wavelength in the range of 1510nm to 1590 nm;
the input end of the optical fiber amplifying assembly is connected with the output end of the scanning light source and is used for amplifying the scanning light;
an optical multiplexing component;
the input end of the coupling component is connected with the transmission end of the optical multiplexing component;
the pull-wire type displacement meter is connected with the transmission end of the coupling component;
the optical input interface is connected with the transmission end of the coupling component and is used for converting an optical signal into an electric signal;
and the analysis display component is connected with the electric output interface of the signal conversion component.
Compared with the prior art, the invention has the beneficial effects that: the optical fiber displacement meter is made by adopting the principle of optical fiber coherent optics, the advantage of the distance measurement of the optical fiber coherent sensor can be fully exerted, and the structure miniaturization and the convenient installation are realized in the industrial application field.
Drawings
FIG. 1 is a cross-sectional view of a pull-wire type displacement gauge;
FIG. 2 is an exploded view of a pull wire type displacement gauge;
FIG. 3 is a schematic structural diagram of a pull-wire type displacement meter;
fig. 4 is a schematic structural diagram of the measuring apparatus.
In the figure: 1-end flange, 2-O-shaped ring, 3-first linear bearing, 4-upper end cover, 5-spring, 6-second linear bearing, 7-bearing seat, 8-sliding rod, 9-fixing seat, 10-measuring device, 11-lower end cover, 12-screw hole, 13-optical fiber, 14-sliding shaft, 15-check ring, 16-scanning light source, 17-erbium-doped optical fiber amplifier, 18-1 × 4PLC optical splitter, 19-1 × 16PLC optical splitter, 20-DWDM1, 21-DWDM2, 22-DWDM3, 23-50:50 optical coupler, 24-photoelectric detector, 25-acquisition card, 26-spectrum analysis circuit and 27-industrial personal computer.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
A pull-wire displacement meter as shown in fig. 1-3, comprising:
the outer protective shell is provided with a cavity;
the measuring device 10 is arranged in the cavity of the outer protective shell and fixedly connected with the cavity, and the measuring device 10 is a coherent optical device;
and the connecting assembly is connected with the measuring instrument 10 at one end, and the other end of the connecting assembly penetrates through the outer protective shell and is in sliding connection with the outer protective shell.
In the embodiment of the invention, the connecting component is used for contacting with an object to be measured during working, and at the moment, the connecting component slides in the outer protective shell until contacting with the measuring instrument 10, so that the coherent optical device can realize non-contact measurement, and the problems of large volume, high requirement on light path alignment and need of installing a reflector in the prior art are solved.
In one embodiment of the present invention, the outer protective shell comprises:
a cover member;
the fixing piece is fixedly arranged in the cover body piece and matched with the measuring instrument 10;
the cover is established the coupling assembling outside and rather than sliding connection's slip subassembly, slip subassembly fixed mounting be in the lid piece.
In the embodiment of the present invention, the cover member includes an upper end cover 4 and a lower end cover 11 matched with the upper end cover, or an upper shell and a lower shell can be matched according to requirements, the fixing member is a fixing seat 9 or a fixing table, the fixing seat 9 is used for fixing the measuring device 10, and the measuring device 10 can be fixed at a certain angle, specifically, arranged in the lower end cover 11, and the sliding assembly is used for limiting the sliding of the connecting assembly, so as to ensure the stable sliding thereof, thereby realizing accurate measurement.
In one embodiment of the present invention, the sliding assembly includes:
a bearing seat 7 fixedly mounted in the cover member;
and the first bearing part is fixedly arranged in the bearing seat 7 and is sleeved outside the connecting assembly in a sliding manner.
In the embodiment of the invention, the bearing seat 7 is arranged between the upper end cover 4 and the lower end cover 11, two ends of the bearing seat are respectively and fixedly connected with the upper end cover 4 and the lower end cover 11, the bearing seat can be clamped or in threaded connection, the disassembly and the assembly are convenient, the first bearing part is the second linear bearing 6, the second linear bearing 6 can also be replaced by a sliding bearing, and the second linear bearing 6 is arranged in the bearing seat 7 and used for guiding the sliding of the connecting assembly, so that the sliding stability is ensured.
In one embodiment of the present invention, as shown in fig. 2, the sliding assembly further includes:
the sliding shaft 14 is slidably mounted in the bearing seat 7, and the sliding shaft 14 is sleeved outside the connecting assembly and fixedly connected with the connecting assembly;
the elastic piece is sleeved outside the connecting assembly and is in sliding connection with the connecting assembly, one end of the elastic piece is connected with the sliding shaft 14, and the other end of the elastic piece is connected with the cover body.
In the embodiment of the invention, the sliding of the connecting assembly is limited by the matching of the sliding shaft 14 and the bearing seat 7, for the convenience of arrangement, a sliding groove matched with the sliding shaft 14 is arranged in the bearing seat 7, the elastic piece is a spring 5 or a shrapnel, one end of the connecting assembly extends out of one part of the upper end cover 4 under the action of the spring 5 in a normal state, when in measurement, the extended part is contacted with an object to be measured, the connecting assembly is driven to slide inwards, the spring 5 is compressed at the moment, and when the connecting assembly is separated from the object to be measured after the measurement is finished, the measuring assembly extends out of the upper end cover 4 again under the action of the reset of the spring; furthermore, in order to prevent the sliding shaft 14 from colliding with the second linear bearing 6, a blocking member is installed between the sliding shaft 14 and the second linear bearing 6, the blocking member is a retainer ring 15, and a gasket may be used instead.
In one embodiment of the invention, the end of the measuring device remote from the connecting assembly is fitted with an optical fiber 13, and the end of the optical fiber 13 remote from the measuring device 10 penetrates through the cover member.
In an embodiment of the invention, the optical fiber 13 is a pigtail of the measuring instrument 10.
In one embodiment of the invention, the connection assembly comprises:
one end of the sliding rod 8 penetrates through the sliding assembly and is connected with the measuring instrument 10, and the other end of the sliding rod penetrates through the cover body piece and is connected with the cover body piece in a sliding mode;
the end flange 1 is sleeved outside the sliding rod 8 in a sliding manner and is fixedly arranged outside the cover body;
and the second bearing part is sleeved outside the sliding rod 8 in a sliding manner and is fixedly arranged between the cover body part and the end flange 1.
In the embodiment of the present invention, the end flange 1 is used for fixing the sliding rod 8, or may be replaced by a flange plate, so as to ensure that the sliding rod 8 can move in one direction, the second bearing part is a first linear bearing 3 or a sliding bearing, and is matched with a second linear bearing 6, so as to further ensure that the sliding rod 8 moves in one direction, in order to improve the sealing effect, both ends of the first linear bearing 3 are provided with O-rings 2, both O-rings 2 are sleeved outside the sliding rod 8 and are respectively arranged in the end flange 1 and the upper end cover 4, and the O-rings 2 are used for sealing the pull-wire type displacement meter as an alternative, or a sealing ring may be used; in addition, in order to facilitate the installation of the stay wire type displacement meter, both ends of the cover body part are provided with screw holes 12 for facilitating the fixation through screws, or provided with thread grooves matched with the screws; when in work, the working steps are as follows: step one, the slide bar 8 can slide back and forth and is used for contacting with an object to be measured; secondly, the end flange 1 is used for fixing the sliding rod 8, and the sliding rod 8 can move in one direction; thirdly, the O-shaped ring 2 is used for sealing the stay wire type displacement meter; step four, the second linear bearing 6 and the first linear bearing 3 are used for further ensuring that the sliding rod 8 moves along one direction; step five, the spring 5 penetrates through the sliding rod 8 and is used for limiting the displacement of the sliding rod 8 and ensuring that the sliding rod 8 can move at a constant speed; step six, the bearing seat 7 is used for fixing the first linear bearing 3, and the bearing seat 7, the upper end cover 4 and the lower end cover 11 are used as an outer protective shell together; the bearing seat 7, the upper end cover 4 and the lower end cover 11 are used for protecting internal devices of the displacement meter from being damaged; seventhly, the fixing seat 9 is used for fixing the measuring device 10, and the measuring device 10 can be fixed at a certain angle; step eight, the screw hole 12 is used for fixing the displacement meter on the installation position.
In one embodiment of the present invention, there is provided a measuring apparatus, as shown in fig. 4, including:
a scanning light source 16 for generating scanning light having a wavelength range of 1510nm to 1590 nm;
the input end of the optical fiber amplifying assembly is connected with the output end of the scanning light source and is used for amplifying the scanning light;
an optical multiplexing component;
the input end of the coupling component is connected with the transmission end of the optical multiplexing component;
the pull-wire type displacement meter is connected with the transmission end of the coupling component;
the optical input interface is connected with the transmission end of the coupling component and is used for converting an optical signal into an electric signal;
and the analysis display component is connected with the electric output interface of the signal conversion component.
In the embodiment of the present invention, the scanning light emitted by the scanning light source 16 is amplified by the optical fiber amplifying component, the optical fiber amplifying component is an erbium-doped optical fiber amplifier 17 or other amplifiers meeting the use requirement, and the input end of the optical fiber amplifying component is connected with the output end of the scanning light source 16 and is used for amplifying the scanning light; then, the light is divided into sixteen parts through the optical division multiplexing component, then the number of channels of each optical channel is increased by three times, the optical division multiplexing component is respectively connected with the displacement meter and the signal conversion component under the action of the coupling component, the coupling component is a 50:50 coupler 23, the reflection end of the coupling component is connected with the signal conversion component, the signal conversion component is a photoelectric detector 24, the optical input interface of the photoelectric detector 24 is connected with the reflection end of the 50:50 coupler 23, and the optical input interface is used for converting optical signals into electric signals, and then the electric signals are analyzed by the analysis component and displayed.
In one embodiment of the present invention, the optical multiplexing component comprises:
1 x 4PLC optical splitters 18 for dividing the optical power equally into four parts;
1 × 16PLC optical splitters 19 for dividing the optical power equally into sixteen parts;
optical wavelength multiplexing, including DWDM1, DWDM2, and DWDM3, is used to separate wavelength bands and increase the number of channels by a factor of three.
In the embodiment of the present invention, the input end of the 1 × 4PLC optical splitter 18 is connected to the output end of the erbium-doped fiber amplifier 17, and is configured to divide light into four parts on average, and the output end of the 1 × 4PLC optical splitter 18 is connected to the input ports of the 4 1 × 16PLC optical splitters 19, and is configured to divide light into 64 parts; the 64 output ends of the 4 1-16 PLC optical splitters 19 are connected with the input end of each device in the 64 DWDM 120 (DWDM: sense Wavelength Division Multiplexing) which can combine a group of optical wavelengths and transmit the optical wavelengths by using one optical fiber), and the wave band is selected to be 1510nm-1537nm through the 64 DWDM 120 band-pass filters; the transmission end of the 64 DWDM 120 is connected with the input end of one device in the 192 DWDM 50-50 coupler 23, and the transmission end of the 64 DWDM 50-50 coupler 23 is connected with a pull-wire displacement meter; the reflection end of the 64 DWDM 120 is connected with the input end of the 64 DWDM 221, the wave band is selected to be 1538nm-1564nm, the transmission end of the 64 DWDM 221 is connected with the input end of one device in the 192 50:50 couplers 23, and the transmission end of the 64 50:50 couplers 23 is connected with a stay wire type displacement meter; the reflection end of the 64 DWDM 221 is connected with the input end of the 64 DWDM 322, the wave band is selected to be 1565nm-1590nm, the transmission end of the 64 DWDM 322 is connected with the input end of one device in the 192 DWDM-50 coupler 23, the transmission end of the 64 DWDM-50 coupler 23 is connected with a stay wire type displacement meter, and the reflection end of the 64 DWDM 322 is used for loss.
In one embodiment of the invention, the analysis display assembly comprises:
the acquisition card 25 is used for acquiring the electric signals;
a spectrum analysis circuit 26 for performing spectrum analysis on the interference signal;
and the industrial personal computer 27 is used for analyzing and displaying the data.
In the embodiment of the present invention, an input end of the acquisition card 25 is connected to an electrical output interface of the photodetector 24, and is configured to acquire an electrical signal, an input end of the spectrum analysis circuit 26 is connected to an output end of the acquisition card 25, and is configured to perform spectrum analysis on an interference signal, an input end of the industrial personal computer 27 is connected to the spectrum analysis circuit 26, and is configured to analyze and display data, and the acquisition card 25 and the spectrum analysis circuit 26 may be combined into a circuit board; the working steps are as follows: step one, a scanning light source 16 is used for generating scanning light with the wavelength range of 1510nm-1590 nm; secondly, the scanning light is amplified through an erbium-doped fiber amplifier 17; step three, dividing the amplified scanning light into 4 parts by the optical power of the scanning light passing through a 1 x 4PLC optical splitter 18; step four, dividing the optical power into 16 parts by a 1 × 16PLC optical splitter 19; step five, each optical channel is connected with one DWDM 120, one DWDM 221 and one DWDM 322, and is used for separating the wave bands and increasing the number of the channels by 3 times; step six, the coupler 23 is used for outputting a pull-wire type displacement meter in a 50:50 mode; seventhly, the photoelectric detector 24 is used for converting the optical signal into an electric signal; step eight, after the electric signals are converted, collecting the electric signals by a collecting card 25; step nine, the interference signal is subjected to spectrum analysis by using a spectrum analysis circuit 26; and step ten, finally, analyzing and displaying the data by using the industrial control machine 27.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A pull-wire displacement meter, comprising:
an outer protective shell;
the measuring device is fixedly arranged on the outer protective shell and is a coherent optical device;
the connecting assembly is arranged in the outer protective shell in a sliding mode, one end of the connecting assembly is connected with the measuring instrument, the other end of the connecting assembly penetrates through the outer protective shell and is connected with the outer protective shell in a sliding mode, and the connecting assembly is arranged in the outer protective shell in a sliding mode
The connecting assembly includes:
one end of the sliding rod is connected with the measuring instrument, and the other end of the sliding rod penetrates through the outer protective shell and is in sliding connection with the outer protective shell;
the end part flange is sleeved outside the sliding rod in a sliding manner and is fixedly arranged outside the outer protection shell.
2. The pull-wire displacement meter according to claim 1, wherein the outer protective case comprises:
a cover member;
the fixing piece is fixedly arranged in the cover body piece;
a slide assembly fixedly mounted within the cover member.
3. The pull-wire displacement gauge according to claim 2, wherein the slide assembly comprises:
a bearing seat fixedly mounted within the cover member;
and the first bearing part is fixedly arranged in the bearing seat and is sleeved outside the connecting assembly in a sliding manner.
4. The pull-wire displacement gauge according to claim 3, wherein the slide assembly further comprises:
the sliding shaft is slidably arranged in the bearing block, and is sleeved outside the connecting assembly and fixedly connected with the connecting assembly;
the elastic piece is sleeved outside the connecting assembly and is in sliding connection with the connecting assembly, one end of the elastic piece is connected with the sliding shaft, and the other end of the elastic piece is connected with the cover body.
5. The pull-wire displacement gauge according to claim 4, wherein a stop is mounted between the sliding shaft and the first bearing.
6. A pull-wire displacement meter according to claim 3, wherein the end of the measuring device remote from the connection assembly is fitted with an optical fibre cooperating therewith, the end of the optical fibre remote from the measuring device extending through the cover member.
7. The pull-wire displacement meter according to claim 3, wherein the connection assembly further comprises:
and the second bearing piece is sleeved outside the sliding rod and is in sliding connection with the sliding rod, and the second bearing piece is fixedly installed between the cover body piece and the end flange and used for limiting the sliding rod to move in one direction.
8. A measuring device, comprising:
a scanning light source for generating scanning light having a wavelength in the range of 1510nm to 1590 nm;
the input end of the optical fiber amplifying assembly is connected with the output end of the scanning light source and is used for amplifying the scanning light;
an optical multiplexing component;
the input end of the coupling component is connected with the transmission end of the optical multiplexing component;
the pull-wire displacement meter according to any one of claims 1-6, connected to a transmission end of a coupling assembly;
the optical input interface is connected with the transmission end of the coupling component and is used for converting an optical signal into an electric signal;
and the analysis display component is connected with the electric output interface of the signal conversion component.
9. The measurement device of claim 8, wherein the optical multiplexing component comprises:
1 × 4PLC optical splitter, is used for dividing the optical power into four equally;
1 × 16PLC optical splitter, is used for dividing the optical power into sixteen shares equally;
optical wavelength multiplexing, including DWDM1, DWDM2, and DWDM3, is used to separate wavelength bands and increase the number of channels by a factor of three.
10. The measurement device of claim 8, wherein the analysis display assembly comprises:
the acquisition card is used for acquiring the electric signals;
a spectrum analysis circuit for performing spectrum analysis on the interference signal;
and the industrial personal computer is used for analyzing and displaying the data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110441260.2A CN113048892A (en) | 2021-04-23 | 2021-04-23 | Stay wire type displacement meter and measuring device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110441260.2A CN113048892A (en) | 2021-04-23 | 2021-04-23 | Stay wire type displacement meter and measuring device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113048892A true CN113048892A (en) | 2021-06-29 |
Family
ID=76520162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110441260.2A Pending CN113048892A (en) | 2021-04-23 | 2021-04-23 | Stay wire type displacement meter and measuring device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113048892A (en) |
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2021
- 2021-04-23 CN CN202110441260.2A patent/CN113048892A/en active Pending
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