CN203849463U - Coaxial type optical fiber head and fiber sensor - Google Patents
Coaxial type optical fiber head and fiber sensor Download PDFInfo
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- CN203849463U CN203849463U CN201320735017.2U CN201320735017U CN203849463U CN 203849463 U CN203849463 U CN 203849463U CN 201320735017 U CN201320735017 U CN 201320735017U CN 203849463 U CN203849463 U CN 203849463U
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- optical fiber
- fiber cable
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 228
- 239000000835 fiber Substances 0.000 title claims abstract description 25
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 230000003287 optical effect Effects 0.000 claims description 15
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000007767 bonding agent Substances 0.000 description 20
- 238000003780 insertion Methods 0.000 description 12
- 230000037431 insertion Effects 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 238000000576 coating method Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 208000034189 Sclerosis Diseases 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012966 insertion method Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/3616—Holders, macro size fixtures for mechanically holding or positioning fibres, e.g. on an optical bench
- G02B6/3624—Fibre head, e.g. fibre probe termination
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
- G01D11/245—Housings for sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver
- G01V8/16—Detecting, e.g. by using light barriers using one transmitter and one receiver using optical fibres
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4246—Bidirectionally operating package structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Optical Transform (AREA)
- Geophysics And Detection Of Objects (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The utility model relates to a coaxial type optical fiber head and a fiber sensor. The Coaxial type optical fiber head comprises a front fitting, provided with a cylindrical part of a shaft hole with a front opening; a cylindrical internal part, mounted on the shaft hole of the cylindrical part; a coaxial type fiber wire, mounted relative to the front fitting under a state of being interpolated into the internal part, and any fiber wire for light projecting or light receiving used as a center, wherein a plurality of fiber wires on the other side are arranged on a concentric circle; and a bonding layer, formed in the internal part, wherein the coaxial type fiber wire interpolated into the internal part is fixed not to move. A position restriction part for position restriction is formed relative to the fiber wire of the other side in the same interval on the internal peripheral wall of the internal part. And the above position restriction part is a shape of straight line along the axial direction of the internal part. Hence, coaxial arrangement precision of the fiber wire is increased and assembly operation of a fiber head is improved.
Description
Technical field
The utility model relates to the technology of the arranged in co-axial alignment precision that improves optical fiber cable.
Background technology
The optical fiber head that Fibre Optical Sensor utilization is made up of optical fiber cable, will detect light and irradiate towards surveyed area, accept its reflected light, thereby detect having or not of object in surveyed area.Just like described in following patent documentation 1 and following patent documentation 2, many optical fiber heads that are subject to the coaxial type of the optical fiber cable that light uses on the concentric circles centered by the optical fiber cable of using by light projector, are configured for the optical fiber head of this Fibre Optical Sensor.
Prior art document
Patent documentation 1: Japanese kokai publication hei 7-234319 communique
Patent documentation 2: TOHKEMY 2002-82228 communique
Utility model content
In order to improve the accuracy of detection of Fibre Optical Sensor, as shown in figure 23, preferably on the concentric circles centered by the optical fiber cable F1 using by light projector uniformly-spaced to configure the optical fiber cable F3 that used by light, improve the arranged in co-axial alignment precision of optical fiber cable F1, F3.But, be the structure utilizing for the aperture D1 of accessory M side of installing optical fibres line F1, F3 and the relevant arranged in co-axial alignment precision that obtains optical fiber cable F1, F3 of the optical fiber footpath of optical fiber cable F1, F3 (diameter of line) in the past.On the other hand, there is machining deviation (so-called tolerance) in the aperture D1 of accessory M side and the optical fiber footpath of optical fiber cable F1, F3, so be that tolerance maximum, optical fiber footpath are be tolerance minimum in the situation that in aperture D1 side, as shown in figure 24, on the position that have the optical fiber cable F1 that uses at light projector, is subject to the optical fiber cable F3 that light uses, produce deviation, arranged in co-axial alignment precision reduces such problem.
The utility model is that the situation based on above-mentioned completes, taking the arranged in co-axial alignment precision that improves optical fiber cable as object.
The coaxial type optical fiber head that scheme one is recorded, possesses: front end accessory, possesses the cylindrical portion of the axis hole with front openings; The internal part of cartridge type, is installed on the axis hole of above-mentioned cylindrical portion; Coaxial type optical fiber cable is installed with respect to above-mentioned front end accessory under the interior state that inserts in above-mentioned internal part, and by light projector with or be subject to, centered by the optical fiber cable of any one party in optical fiber cable that light uses, on concentric circles, to arrange many opposing party's optical fiber cable; And bonding coat, be formed in above-mentioned internal part, and by the interior above-mentioned coaxial type optical fiber cable that inserts in above-mentioned internal part be fixed as can not displacement state, on the internal perisporium of above-mentioned internal part in week upwards to be uniformly-spaced formed with the position limitation portion that above-mentioned the opposing party's optical fiber cable is carried out to position limitation, and above-mentioned position limitation portion is the axial rectilinear form along above-mentioned internal part.
In this formation, be arranged at the position of the position limitation portion limit fibre line of internal part, so be difficult for producing depart from (bias) of optical fiber cable.Therefore, can improve the arranged in co-axial alignment precision of optical fiber cable.And each optical fiber cable is fixed with the state of arranged in co-axial alignment by bonding coat, so while use, do not have the position relationship of optical fiber cable 41,43 to change and the destroyed situation of arranged in co-axial alignment.In addition, position limitation portion is the axial rectilinear form along internal part, copies position limitation portion and becomes rectilinear form so be inserted in the opposing party's of internal part optical fiber cable.Therefore, the opposing party's optical fiber cable is not flexible in the inside of internal part, thereby improves arranged coaxial precision.In addition, if in advance position limitation portion is formed as to rectilinear form, when internal part insertion, position limitation portion is also as the guiding piece performance function to axial front side guiding by optical fiber cable, so have advantages of easily optical fiber cable is inserted into internal part.
The coaxial type optical fiber head of scheme two is on the basis of the coaxial type optical fiber head of scheme one, and wherein, above-mentioned position limitation portion is cross section toroidal.
Like this, in the time that forward end accessory (internal part) inserts optical fiber cable, even if optical fiber cable contacts with position limitation portion, be also difficult for optical fiber cable to cause damage, nor easily cause distortion etc.
The coaxial type optical fiber head of scheme three is on the basis of the coaxial type optical fiber head of scheme one, wherein, on the outer peripheral face of above-mentioned internal part, be provided with ridge, this ridge by with the hole wall butt of axis hole that is formed at above-mentioned cylindrical portion, thereby in the consistent mode in the center of above-mentioned internal part and the center of above-mentioned cylindrical portion, above-mentioned internal part is positioned with respect to above-mentioned cylindrical portion.Like this, internal part and optical fiber cable can be located to (locating in the mode that center is consistent) with respect to front end accessory.Therefore, can improve the accuracy of detection of Fibre Optical Sensor.
The coaxial type optical fiber head of scheme four is on the basis of the coaxial type optical fiber head of scheme one, wherein, front end at above-mentioned internal part is provided with head, this head has locating surface, this locating surface by with the peritreme butt of above-mentioned axis hole that is formed at above-mentioned cylindrical portion, thereby in the consistent mode in the center of above-mentioned internal part and the center of above-mentioned cylindrical portion, above-mentioned internal part is located with respect to above-mentioned cylindrical portion.Like this, internal part and optical fiber cable can be located to (locating in the mode that center is consistent) with respect to front end accessory.Therefore, can improve the accuracy of detection of Fibre Optical Sensor.
The Fibre Optical Sensor of scheme five is characterised in that to have: sensor main body portion; And by means of be fixed on above-mentioned coaxial type optical fiber cable end connector portion and be installed on the coaxial type optical fiber head described in any one in the such scheme one to four on the sensor main part.
The manufacture method of the coaxial type optical fiber head of scheme six, this coaxial type optical fiber head be by by light projector with or be subject to centered by the optical fiber cable of any one party in optical fiber cable that light uses and the coaxial type optical fiber cable of arranging many opposing party's optical fiber cable on concentric circles is arranged on front end accessory, the manufacture method of above-mentioned coaxial type optical fiber head is characterised in that, possess following steps: by week upwards uniformly-spaced to form the function of position of the optical fiber cable that plays the above-mentioned the opposing party of restriction and the step of installing with respect to the cylindrical portion that is formed at above-mentioned front end accessory along the internal part of the cartridge type of the position limitation portion of axial linearly extended shape, be accommodated in the mode contraposition between above-mentioned position limitation portion with above-mentioned the opposing party's optical fiber cable, and run through with leading section above-mentioned internal part cylindrical portion mode by light projector with and be subject to optical fiber cable that light is used to be assembled in the step of above-mentioned front end accessory, to the light projector that runs through above-mentioned cylindrical portion with and be subject to the step of the leading section adhesive-applying of the above-mentioned optical fiber cable that light uses, the step of above-mentioned internal part side will be retracted at the above-mentioned optical fiber cable of leading section adhesive-applying, and the step that removal is evened up the front end face of the front end of above-mentioned optical fiber cable and above-mentioned cylindrical portion from the outstanding part of the front end face of above-mentioned cylindrical portion after retracting.
The filling operation of considering the bonding agent to internal part for example carried out before optical fiber cable is inserted into internal part.But if be pre-charged with bonding agent, in any case the insertion resistance while inserting optical fiber cable to internal part all becomes greatly, assembling operation is poor.This aspect on, according in the manufacture method of the disclosed coaxial type optical fiber head of this instructions, first optical fiber cable is run through and be inserted into front end accessory (internal part), afterwards, the optical fiber cable of adhesive-applying on leading section is retracted to the inner side of internal part, thereby bonding agent is filled into internal part.Like this, insertion resistance force diminishes when optical fiber cable is inserted into internal part, so assembleability is good, manufactures efficiency high.And position limitation portion is the axial rectilinear form along internal part, so play a role as guiding piece in the time that forward end accessory (internal part) inserts or retracts optical fiber cable.Therefore, assembleability is further good, manufactures efficiency high.
Utility model effect
According to the utility model, can improve the arranged in co-axial alignment precision of optical fiber cable.And, can improve the assembling operation of optical fiber head.
Brief description of the drawings
Fig. 1 is the block diagram that is applicable to the Fibre Optical Sensor of embodiment.
Fig. 2 is the stereographic map of coaxial type optical fiber head.
Fig. 3 is the vertical sectional view of front end accessory.
Fig. 4 is the A-A line cut-open view in Fig. 3.
Fig. 5 is the stereographic map (representing the figure of the not installment state of cover) of observing front end accessory from rear.
Fig. 6 is the stereographic map of observing internal part from rear.
Fig. 7 is the stereographic map from forward observation internal part.
Fig. 8 is the enlarged drawing of Fig. 4.
Fig. 9 is the vertical sectional view of internal part.
Figure 10 is the front view of internal part.
Figure 11 is the right view of internal part.
Figure 12 is the left view of internal part.
Figure 13 is the upward view of internal part.
Figure 14 is the rear view of internal part.
Figure 15 is the vertical view of internal part.
Figure 16 is the stereographic map that represents the structure of plug.
Figure 17 is the figure (representing the figure of first step) that represents the manufacturing process of coaxial type optical fiber head.
Figure 18 is the figure (representing the figure of second step) that represents the manufacturing process of coaxial type optical fiber head.
Figure 19 is the figure (representing the figure of third step) that represents the manufacturing process of coaxial type optical fiber head.
Figure 20 is the figure (representing the figure of the 4th step) that represents the manufacturing process of coaxial type optical fiber head.
Figure 21 is the figure (representing the figure of the 5th step) that represents the manufacturing process of coaxial type optical fiber head.
Figure 22 is the figure (representing the figure of the 6th step) that represents the manufacturing process of coaxial type optical fiber head.
Figure 23 is the cut-open view (expression does not have the figure of the state departing from of line) of coaxial type optical fiber head.
Figure 24 is the cut-open view (representing to produce on line the figure of the state departing from) of coaxial type optical fiber head.
In figure:
10-Fibre Optical Sensor; 20-sensor main body portion; 30-coaxial type optical fiber head; 40-coaxial type optical fiber cable; The optical fiber cable that 41-light projector is used; The optical fiber cable that 43-is used by light; 60-front end accessory; 65-cylindrical portion; 70-internal part; 71-ridge; 72-head; 75-position limitation portion; 77-bonding coat; 80-plug; U-hardening bonding agent.
Embodiment
< embodiment >
According to Fig. 1 to Figure 22, an embodiment of the present utility model is described.
1. the structure of Fibre Optical Sensor 10
Fig. 1 is the block diagram that represents the formation of Fibre Optical Sensor 10.Fibre Optical Sensor 10 possesses sensor main body portion 20, is installed on the coaxial type optical fiber head 30 of sensor main body portion 20 by means of plug 80.The example that plug 80 is equivalent to " connector portion " of the present utility model should be described.
Sensor main body portion 20 possesses the housing 20A that is substantially box.Be provided with light-projecting portion 21, light projector circuit 22, light accepting part 23, light receiving circuit 24, control circuit 27 in the inside of housing 20A.Light-projecting portion 21 is for example made up of the light-projecting component of LED or laser diode etc., plays the optical fiber cable 41 used by the light projector function to the surveyed area light irradiation of regulation.Light projector circuit 22 is response drives light-projecting portion 21 driving circuits from the instruction of control circuit 27.
Light accepting part 23 is for example made up of the photo detector of photistor etc., plays by being subject to the optical fiber cable 43 that light is used to accept the catoptrical function from surveyed area.Light receiving circuit 24 plays the function that is subject to light signal of the output level corresponding with the light income of light accepting part 23.Control circuit 27 plays the threshold value comparison of the level that is subject to light signal of exporting from light receiving circuit 24 and regulation, thereby judges the position of the object in surveyed area or the function having or not.
Fig. 2 is the stereographic map of coaxial type optical fiber head 30.The plug 80 that front end accessory 60, internal part 70 and the end at coaxial type optical fiber cable 40 that coaxial type optical fiber head 30 possesses coaxial type optical fiber cable 40, inserts in the protection tube 50 in the outside of coaxial type optical fiber cable 40 outward, installs at the front end of coaxial type optical fiber cable 40 installed.Should illustrate, the symbol 90 shown in Fig. 2 is pattern pipes of model number for recording product etc.
Fig. 3 is the vertical section of front end accessory 60, and Fig. 4 is the A-A line cut-open view of Fig. 3.Coaxial type optical fiber cable 40 comprises the optical fiber cable 41 that light projector uses, the optical fiber cable 43 that used by light of many (in these examples, 9).Be subject to the wire diameter of the optical fiber cable 41 that the wire diameter of the optical fiber cable 43 that light uses uses than light projector little, in this example, the wire diameter that is subject to the optical fiber cable 43 that light uses is approximately 1/2 size of the wire diameter of the optical fiber cable 41 used of light projector.As shown in Fig. 4, Fig. 8, be subject to optical fiber cable 43 that light uses to be uniformly-spaced arranged on concentric circles (circle centered by the central point of the optical fiber cable 41) L of the optical fiber cable 41 of using with respect to light projector.In this instructions, uniformly-spaced optical fiber cable 43 is arranged on the concentric circles L centered by optical fiber cable 41 and is called arranged in co-axial alignment.
Front end accessory 60 is the accessories (metal accessory) for coaxial type optical fiber cable 40 being installed on to the installation position of regulation, is formed with and has cylindrical portion 65 in the front side (in Fig. 3 left side) of fitment body 61 that is substantially piece type.Be provided with the incorporating section 63 of storage coaxial type optical fiber cable 40 in the inside of fitment body 61.Incorporating section 63, below fitment body 61 penetrates into, becomes the formation that the coaxial type optical fiber cable 40 of protection tube 50 coatings is drawn downwards.In addition, after fitment body 61, be provided with cover 67.Under the uninstalled state of cover 67, as shown in Figure 5, the side below of the incorporating section 63 of fitment body 61 is unlimited state, so become side from behind the front end of coaxial type optical fiber cable 40 is inserted into the formation of cylindrical portion 65.
As shown in Figure 2 and Figure 3, cylindrical portion 65 is arranged on the position of the portion on the upper side a little of central authorities of the front face side of fitment body 61, is the shape that level is extended as the crow flies.Cylindrical portion 65 has to be inserted coaxial type optical fiber cable 40 and fixing axis hole 66.The rear end side of axis hole 66 is communicated with the incorporating section 63 of fitment body 61, and front is opening forwardly.
The position of the forward end in the axis hole 66 that is formed at cylindrical portion 65 is accommodated with internal part 70.Fig. 6, Fig. 7 are the stereographic maps of internal part 70, and Figure 10 to Figure 15 is six views of internal part 70.Internal part 70 is synthetic resin systems, is the cartridge type of the through hole 73 that is formed on vertically fore-and-aft direction perforation.As shown in Figure 6, at the periphery wall of internal part 70 along being axially formed with 3 ridges 71.This ridge 71 plays with cylindrical portion 65 center and internal part 70 center (more specifically, be formed at the through hole 73 center of internal part 70 with respect to the axis hole 66 center that is formed at cylindrical portion 65) consistent mode, the function that internal part 70 is located with respect to cylindrical portion 65.; be configured to 3 ridges 71 that are formed at internal part 70 and contact with 3 with the hole wall of the axis hole 66 that is formed at cylindrical portion 65, thereby the through hole 73 center centering that is formed at internal part 70 is the state consistent with the axis hole 66 center that is formed at cylindrical portion 65.On the other hand, ridge 71 uniformly-spaced forms on circumferentially, is triangle (with reference to Fig. 6) substantially.
In addition, be provided with the head 72 in large footpath at the front end of internal part 70.The head 72 in large footpath is the cone shape that diameter attenuates towards rear.This head 72 and ridge 71 play in the same manner and make the consistent function in internal part 70 center and cylindrical portion 65 center.
That is, the circular conical surface 72A of head 72 and the peritreme butt of axis hole 66, thus internal part 70 is felt relieved towards cylindrical portion 65 center, so can position in the internal part 70 center mode consistent with cylindrical portion 65 center.Should illustrate, be also circular conical surface if make in advance the peritreme of axis hole 66, internal part 70 can be felt relieved accurately with respect to cylindrical portion 65, so preferably.Should illustrate, circular conical surface 72A is an example of " locating surface " of the present utility model.
And, be configured to, be inserted in the coaxial type optical fiber cable 40 of cylindrical portion 65 leading section inleakage parts 70 through hole 73 and bare wire (plain Line) front end is fixed by aftermentioned bonding coat 77 from the state of the front end face 65A face forward of cylindrical portion 65.
And as shown in Figure 7, Figure 8, be formed with towards the interior side-prominent position limitation portion 75 as center, hole at the hole wall of the through hole 73 that is formed at internal part 70.On position limitation portion 75 and the concentric circles L being configured in centered by the optical fiber cable 41 of using by light projector be subject to optical fiber cable 43 that light uses accordingly in week upwards uniformly-spaced to form.
As shown in Figure 8, this position limitation portion 75, between the each optical fiber cable 43 being configured on concentric circles L, plays each optical fiber cable 43 in the function of upwards locating in week.By like this, compared with there is no the situation of setting position limiting unit 75, can prevent from being subject to departing from of optical fiber cable 43 that light uses, thereby can improve the arranged in co-axial alignment precision of coaxial type optical fiber cable 40.Should illustrate, arranged in co-axial alignment precision is high refers to that optical fiber cable 41 center is consistent with cylindrical portion 65 center, and each optical fiber cable 43 state uniformly-spaced to configure on the concentric circles L centered by optical fiber cable 41 that used by light.
In addition, position limitation portion 75 is cross section toroidal (semi-circular shape substantially).Be toroidal by making in advance cross section, in the time that optical fiber cable 41,43 is inserted to internal part 70, even if optical fiber cable 41,43 contact position limiting units 75 are also difficult for optical fiber cable 41,43 to cause damage, nor easily cause distortion etc.
In addition, as shown in Figure 8, in the through hole 73 of internal part 70, be filled with the hardening bonding agent U of resin system (be epoxy resin as an example etc.).Hardening bonding agent U-shaped become bonding each optical fiber cable 41,43 bonding coat 77 so that position do not depart from.Suppose in the situation that not being provided with bonding coat 77, the situation that can cause in the inside of internal part 70 each optical fiber cable 41,43 to move and arranged in co-axial alignment precision is reduced, but by bonding coat 77 is set as present embodiment, the position of each optical fiber cable 41,43 is fixed, thereby can improve arranged in co-axial alignment precision.
In addition, each optical fiber cable 41,43 remains optical fiber cable 41,43 or the state that separates of internal part 70 from other by bonding coat 77.If each optical fiber cable 41,43 contacts with internal part 70 or other optical fiber cable 41,43, when apply external force certain opportunity, likely optical fiber cable 41,43 and internal part 70 or other optical fiber cable 41,43 are interfered strongly and are damaged, or cause distortion.
At that point; by as in the present embodiment; each optical fiber cable 41,43 is remained and other optical fiber cable 41,43 or the state that separates of internal part 70 by bonding coat 77; can protect each optical fiber cable 41,43; even if apply external force on certain opportunity; also can avoid each optical fiber cable 41,43 to produce distortion, or damage.
In addition, as shown in Figure 9, position limitation portion 75 is along the rectilinear form of axial (fore-and-aft direction) of internal part 70, the scope till being formed at from the position of the forward end of through hole 73 to central portion.By in advance position limitation portion 75 being formed as to rectilinear form, thereby the optical fiber cable 43 that is inserted into internal part 70 is copied position limitation portion 75 and is become rectilinear form.Therefore, optical fiber cable 43 is not flexible in the inside of internal part 70, and arranged coaxial precision uprises.In addition, if in advance position limitation portion 75 is formed as to rectilinear form, while insertion with respect to through hole 73, position limitation portion 75 is also as the guiding piece performance function to axial front side guiding by optical fiber cable 43, so there is the advantage that easily optical fiber cable 43 is inserted into internal part 70.
If return to Fig. 1, Fig. 2 goes on to say, plug 80 is installed on the terminal part of coaxial type optical fiber cable 40.Be provided with pair of right and left insertion section 81,83 in the bottom of plug 80.Become the structure (with reference to Figure 16) of inserting respectively the optical fiber cable 41 that light projector uses in each insertion section 81,83 and being subject to the optical fiber cable 43 that light uses.Become the receiving portion (omit diagram) that is formed with locking-type plug 80 in the front side wall of sensor main body portion 20, plug 80 is inserted to receiving portion and the structure that can lock.
And, plug 80 is being inserted under the state of sensor main body portion 20, as shown in Figure 1, be inserted into optical fiber cable 41 that the light projector of insertion section 81 uses and be positioned at the front of light-projecting portion 21, the optical fiber cable 43 that light is used of being subject to that is inserted into insertion section 83 is positioned at the front of light accepting part 23.Therefore,, if penetrate light from light-projecting portion 21, the optical fiber cable 41 that this light can be used by light projector is irradiated to the surveyed area of regulation.In addition, the reflection of light light that is irradiated to surveyed area can be imported to light accepting part 23 by the optical fiber cable 43 that is subject to light and uses makes it be subject to light.
In the present embodiment, as shown in Figure 2, on the outer peripheral face of cylindrical portion 65 of being located at front end accessory 60, cut screw thread, so in the installation position that coaxial type optical fiber head 30 is fixed on to regulation (in this example, panel 100) situation under, after cylindrical portion 65 being inserted on the mounting hole 110 that is formed at panel 100, by bolted, thus can be with respect to the fixing front end accessory 60 of panel 100.
After front end accessory 60 fixing, the optical fiber cable 41 of using by light projector if drive light-projecting portion 21 is to surveyed area light irradiation, if there is object in surveyed area, at body surface reflected light.And, import light accepting part 23 in the catoptrical part of body surface reflection by the optical fiber cable 43 that is subject to light and uses, become the state of the threshold value that the exceedance of levels that is subject to light signal that light receiving circuit 24 exports specifies.
On the other hand, the in the situation that of there is not object in surveyed area, there is no reflection of light, be not almost subject to the light of light by light accepting part 23, so become the level that is subject to light signal that light receiving circuit 24 the exports state lower than the threshold value of regulation.Therefore,, by utilizing control circuit 27 by compared by the level of light signal and the threshold value of regulation, can judge the position of the object in surveyed area or have or not.
2. the manufacture method of coaxial type optical fiber head 30
Coaxial type optical fiber head 30 is by 7 following step manufactures.First, in a first step, carry out installing with respect to the cylindrical portion 65 of front end accessory 60 operation of internal part 70.Internal part 70 after outer peripheral face adhesive-applying C, with respect to the axis hole 66 of cylindrical portion 65 that is formed at front end accessory 60 from front side (left side of Figure 17) insert.
Internal part 70 is inserted in cylindrical portion 65, the moment of substantially inserting in the entirety of internal part 70, the head 72 that is formed at the large footpath of front end is run into the front end face 65A of cylindrical portion 65 and become the state that can not insert again on this, finishes the installation of internal part 70.Installing under the state finishing, internal part 70 as shown in figure 17, except the almost entirety of the head 72 of front end is accommodated in cylindrical portion 65, becomes the state that the front end of head 72 is given prominence to front side a little from front end face 65A.
In addition, the internal part 70 that is incorporated in cylindrical portion 65 utilizes the effect of the circular conical surface 72A that is formed at head 72 and is formed at the effect of the ridge 71 of periphery wall, and is positioned in the through hole 73 center mode consistent with the axis hole 66 center that is formed at cylindrical portion 65.And, further, utilize the bonding agent C that is coated to outer peripheral face, keep the state being positioned the hole wall that is fixed on axis hole 66.
Next, in second step, the operation that 41 and 9 of optical fiber cables that carry out that 1 light projector is used are assembled front end accessory 60 by optical fiber cable 43 that light is used.Particularly, each optical fiber cable 41,43 inserts front end accessory 60 from rear, successively the incorporating section 63 of through flow fitting main body 61, cylindrical portion 65, be accommodated in the internal part 70 of the front of cylindrical portion 65, line front end from the front end face of cylindrical portion 65 forwards outstanding specified length insert (the size H shown in Figure 18).
In addition, inserting optical fiber cable at 41,43 o'clock, the optical fiber cable 41 of being used with light projector by assembling operation person is positioned at the through hole 73 center of internal part 70, and the position that is subject to optical fiber cable 43 that light is used to be accommodated in mode between position limitation portion 75 to adjust optical fiber cable 43 of remaining 9.Like this, can be by the optical fiber cable that used by light 43 to be uniformly-spaced arranged on the concentric circles L centered by the optical fiber cable 41 of using by light projector.
In addition, the insertion method of optical fiber cable 41,43 can adopt following methods: the optical fiber cable 41 of at first light projector being used is inserted into after the through hole 73 of internal part 70, adjust position in the mode being accommodated between position limitation portion 75, and will be subject to each optical fiber cable 43 that light is used to be inserted into the method for through hole 73 afterwards; The outside of the optical fiber cable 41 of using at light projector in advance uniformly-spaced configures 9 optical fiber cables 43, the mode being accommodated between position limitation portion 75 with optical fiber cable 43 is adjusted position, and by light projector with and be subject to optical fiber cable 41,43 that light is used to be inserted in the lump the method for the through hole 73 of internal part 70.
In addition, be formed with the tapered portion 76 of mortar type in the rear end of internal part 70, in the time that optical fiber cable 41,43 is inserted into internal part 70, become the structure of optical fiber cable 41,43 guiding of the central side to through hole 73.
Next,, in the 3rd step, as shown in figure 19, carry out the operation of the leading section coating hardening bonding agent U of the optical fiber cable 41,43 that the front end face 65A from cylindrical portion 65 is forwards given prominence to.The operation of coating hardening bonding agent U is used syringe etc., carries out in the mode of the periphery of surrounding each optical fiber cable 41,43.
And, in the 4th step, as shown in figure 20, carry out moving optical fiber cable 41,43 to rear, the leading section of line (part of coating hardening bonding agent U) is withdrawn into the operation in the through hole 73 of internal part 70.If the leading section of optical fiber cable 41,43 is retracted, leading section and the inside that is introduced into through hole 73 together with coated hardening bonding agent U, so can fill in the inside of through hole 73 hardening bonding agent U.
Therefore, if the hardening bonding agent U having filled sclerosis, the optical fiber cable 43 of sensitive side as shown in Figure 8, to be uniformly-spaced arranged in the state fixed position on the concentric circles L centered by optical fiber cable 41.In addition, be filled in the hardening bonding agent U of inside of through hole 73 in the time retracting, enter the gap between gap, the each optical fiber cable 41,43 between internal part 70 and each optical fiber cable 41,43, so each optical fiber cable 41,43 can be remained from other optical fiber cable 41,43, the state that internal part 70 separates.
In addition, the amount of retracting of optical fiber cable 41,43 is preferably few a little than the outstanding length from front end face 65A, so that the front end of optical fiber cable 41,43 becomes the state a little forwards stretching out from the front end face 65A of cylindrical portion 65 after retracting.Like this, the part of stretching out from front end face 65A of finally removing in optical fiber cable 41,43 is removed, thereby can be by involutory the front end face 65A of the front position of optical fiber cable 41,43 and cylindrical portion 65.
Afterwards, in five steps, as shown in figure 21, carry out the operation to optical fiber cable 41,43 assembling protection tubes 50, plug 80, pattern pipe 90.And, in the 6th step, as shown in figure 22, carry out the bending downwards and be accommodated in the operation of the incorporating section 63 of fitment body 61 together with protection tube of part that the rear to fitment body 61 in optical fiber cable 41,43 is drawn.Afterwards, the cover 67 that the back side is coated with to bonding agent is installed to fitment body 61.Thus, become the state being sealed by cover 67 of fitment body 61 below.
And, after the hardening bonding agent U sclerosis applying, carry out the 7th step in the 3rd step.In the 7th step, the operation that uses the instrument of muller (grinder) or sander (sander) etc. to grind the fore-end of cylindrical portion 65.Pass through grinding operation, remove part (the B portion shown in Figure 22 of stretching out from the front end face 65A of cylindrical portion 65, the front end of internal part 70, the front end of optical fiber cable 41,43), as shown in Figure 3, the front end of the front end of internal part 70, optical fiber cable 41,43 is processed as with the front end face 65A of cylindrical portion 65 and evens up.By more than, can produce coaxial type optical fiber head 30.
3. effect explanation
In coaxial type optical fiber head 30, be arranged on the position of the position limitation portion 75 limit fibre lines 43 of internal part 70, so be difficult for causing depart from (bias) of optical fiber cable 41,43.Therefore, can improve the arranged in co-axial alignment precision of optical fiber cable 41,43.And each optical fiber cable 41,43 is fixed with the state of arranged in co-axial alignment by bonding coat 77, so while use, do not have the position relationship of optical fiber cable 41,43 to change and the destroyed situation of arranged in co-axial alignment.In addition, position limitation portion 75 is the axial rectilinear form along internal part 70, copies position limitation portion 75 to become rectilinear form so be inserted in the optical fiber cable 43 of internal part 70.Therefore, optical fiber cable 43 is not flexible in the inside of internal part 70, and arranged coaxial precision improves.In addition, if in advance position limitation portion 75 is formed as to rectilinear form, when through hole 73 insertion, position limitation portion 75 is also as the guiding piece performance function to axial front side guiding by optical fiber cable 43, so there is the advantage that easily optical fiber cable 43 is inserted into internal part 70.
In addition, the filling operation of considering hardening bonding agent U for example carried out before the through hole 73 that optical fiber cable 41,43 is inserted to internal part 70.But, if first apply hardening bonding agent U, all becoming greatly in any case insert the optical fiber cable insertion resistance of 41,43 o'clock to through hole 73, assembling operation is poor.At that point, in the manufacture method of the disclosed coaxial type optical fiber head 30 of present embodiment, first internal part 70 runs through insertion optical fiber cable 41,43, afterwards, to be withdrawn into the inner side of internal part 70 at the optical fiber cable 41,43 of leading section coating hardening bonding agent U, thereby hardening bonding agent U is filled in the through hole 73 of internal part 70.If like this, the insertion resistance force diminishes when optical fiber cable 41,43 is inserted into internal part 70, so assembleability is good, manufactures efficiency high.
In addition, in the present embodiment, retract optical fiber cable 41,43 in the mode that becomes the state that front end stretches out a little from the front end face 65A of cylindrical portion 65, then the front end stretching out is finally removed, thereby the front end of optical fiber cable 41,43 is processed as with the front end face 65A of cylindrical portion 65 and is evened up.Like this, can reduce departing from of line front position, its result, can keep object from becoming detected object till the distance of line front end, can improve the accuracy of detection of Fibre Optical Sensor 10.
Other embodiment > of <
The utility model is not limited to the embodiment illustrating according to above-mentioned description and accompanying drawing, and for example following embodiment is also contained in technical scope of the present utility model.
(1) in the present embodiment,, as the configuration example of coaxial type optical fiber cable 40, show on the concentric circles L centered by the optical fiber cable 41 of using by light projector the example that is subject to the optical fiber cable 43 that light uses uniformly-spaced to arrange.The configuration of optical fiber cable 41,43 is not limited to the disclosed configuration of embodiment, for example, also can make light projector with and be subject to arrangement that light uses conversely, the optical fiber cable that used by light 43 is configured in to central side, the optical fiber cable 41 of using uniformly-spaced to arrange light projector on the concentric circles centered by optical fiber cable 43.
(2) in the present embodiment, show the example that position limitation portion 75 is formed to the first half of internal part 70, but also can form in the length range of internal part.In addition, in embodiment, the cross section that makes position limitation portion 75 is toroidal, but as long as preventing the shape of position deviation of optical fiber cable 43, for example, can be also section trapezoidal shape etc.
Claims (5)
1. coaxial type optical fiber head, is characterized in that, possesses:
Front end accessory, possesses the cylindrical portion of the axis hole with front openings;
The internal part of cartridge type, is installed on the above-mentioned axis hole of above-mentioned cylindrical portion;
Coaxial type optical fiber cable is installed with respect to above-mentioned front end accessory under the interior state that inserts in above-mentioned internal part, and by light projector with or be subject to, centered by the optical fiber cable of any one party in optical fiber cable that light uses, on concentric circles, to arrange many opposing party's optical fiber cable; And
Bonding coat, is formed in above-mentioned internal part, and by the interior above-mentioned coaxial type optical fiber cable that inserts in above-mentioned internal part be fixed as can not displacement state,
On the internal perisporium of above-mentioned internal part in week upwards to be uniformly-spaced formed with the position limitation portion that above-mentioned the opposing party's optical fiber cable is carried out to position limitation, and above-mentioned position limitation portion is the axial rectilinear form along above-mentioned internal part.
2. coaxial type optical fiber head according to claim 1, is characterized in that,
Above-mentioned position limitation portion is cross section toroidal.
3. coaxial type optical fiber head according to claim 1, is characterized in that,
On the outer peripheral face of above-mentioned internal part, be provided with ridge, this ridge by with the hole wall butt of axis hole that is formed at above-mentioned cylindrical portion, thereby in the consistent mode in the center of above-mentioned internal part and the center of above-mentioned cylindrical portion, above-mentioned internal part is positioned with respect to above-mentioned cylindrical portion.
4. coaxial type optical fiber head according to claim 1, is characterized in that,
Front end at above-mentioned internal part is provided with head, this head has locating surface, this locating surface by with the peritreme butt of above-mentioned axis hole that is formed at above-mentioned cylindrical portion, thereby in the consistent mode in the center of above-mentioned internal part and the center of above-mentioned cylindrical portion, above-mentioned internal part is located with respect to above-mentioned cylindrical portion.
5. a Fibre Optical Sensor, is characterized in that, has:
Sensor main body portion; And
By means of be fixed on above-mentioned coaxial type optical fiber cable end connector portion and be installed on the coaxial type optical fiber head described in any one in the claim 1 to 4 on the sensor main part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-006286 | 2013-01-17 | ||
| JP2013006286A JP6140456B2 (en) | 2013-01-17 | 2013-01-17 | Coaxial optical fiber head, optical fiber sensor, and coaxial optical fiber head manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203849463U true CN203849463U (en) | 2014-09-24 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320735017.2U Expired - Fee Related CN203849463U (en) | 2013-01-17 | 2013-11-19 | Coaxial type optical fiber head and fiber sensor |
| CN201310584958.5A Expired - Fee Related CN103941355B (en) | 2013-01-17 | 2013-11-19 | Coaxial optical fiber head, optical fiber sensor, and method for manufacturing coaxial optical fiber head |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310584958.5A Expired - Fee Related CN103941355B (en) | 2013-01-17 | 2013-11-19 | Coaxial optical fiber head, optical fiber sensor, and method for manufacturing coaxial optical fiber head |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6140456B2 (en) |
| CN (2) | CN203849463U (en) |
| TW (1) | TWI626484B (en) |
| WO (1) | WO2014112172A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941355A (en) * | 2013-01-17 | 2014-07-23 | 松下神视株式会社 | Coaxial optical fiber head, optical fiber sensor, and method for manufacturing coaxial optical fiber head |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017102193A (en) * | 2015-11-30 | 2017-06-08 | パナソニック デバイスＳｕｎｘ株式会社 | Coaxial fiber head, fiber sensor, and method of manufacturing coaxial fiber head |
| DE102016202093A1 (en) * | 2016-02-11 | 2017-08-17 | Olympus Winter & Ibe Gmbh | Videoscope |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS554043A (en) * | 1978-06-26 | 1980-01-12 | Nippon Telegr & Teleph Corp <Ntt> | Optical connector |
| JPS6227305U (en) * | 1985-08-02 | 1987-02-19 | ||
| JP2585129Y2 (en) * | 1991-10-11 | 1998-11-11 | 旭化成工業株式会社 | Fiber unit |
| JP3425985B2 (en) * | 1993-01-12 | 2003-07-14 | 三菱レイヨン株式会社 | Optical fiber sensor head |
| JP3517443B2 (en) * | 1994-02-23 | 2004-04-12 | 三菱レイヨン株式会社 | Optical fiber sensor head |
| JP3273123B2 (en) * | 1996-08-22 | 2002-04-08 | 京セラ株式会社 | Multi-core ferrule |
| JPH11352358A (en) * | 1998-06-10 | 1999-12-24 | Sumitomo Electric Ind Ltd | Production of optical connector and optical connector ferrule |
| JP2007279194A (en) * | 2006-04-04 | 2007-10-25 | Wired Japan:Kk | Fiber optic cable, optical transmission method, and spectroanalysis system |
| CN202523824U (en) * | 2012-04-24 | 2012-11-07 | 延安双丰集团有限公司 | Underground high-power ultrasonic-dedicated coaxial cable |
| JP6140456B2 (en) * | 2013-01-17 | 2017-05-31 | パナソニック デバイスＳｕｎｘ株式会社 | Coaxial optical fiber head, optical fiber sensor, and coaxial optical fiber head manufacturing method |
-
2013
- 2013-01-17 JP JP2013006286A patent/JP6140456B2/en active Active
- 2013-10-24 WO PCT/JP2013/078788 patent/WO2014112172A1/en active Application Filing
- 2013-11-19 CN CN201320735017.2U patent/CN203849463U/en not_active Expired - Fee Related
- 2013-11-19 CN CN201310584958.5A patent/CN103941355B/en not_active Expired - Fee Related
- 2013-12-02 TW TW102144044A patent/TWI626484B/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941355A (en) * | 2013-01-17 | 2014-07-23 | 松下神视株式会社 | Coaxial optical fiber head, optical fiber sensor, and method for manufacturing coaxial optical fiber head |
| CN103941355B (en) * | 2013-01-17 | 2017-05-17 | 松下神视株式会社 | Coaxial optical fiber head, optical fiber sensor, and method for manufacturing coaxial optical fiber head |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6140456B2 (en) | 2017-05-31 |
| JP2014137294A (en) | 2014-07-28 |
| CN103941355A (en) | 2014-07-23 |
| CN103941355B (en) | 2017-05-17 |
| TWI626484B (en) | 2018-06-11 |
| WO2014112172A1 (en) | 2014-07-24 |
| TW201430419A (en) | 2014-08-01 |
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