CN208671917U - Displacement sensor - Google Patents
Displacement sensor Download PDFInfo
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- CN208671917U CN208671917U CN201820608085.5U CN201820608085U CN208671917U CN 208671917 U CN208671917 U CN 208671917U CN 201820608085 U CN201820608085 U CN 201820608085U CN 208671917 U CN208671917 U CN 208671917U
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Abstract
The utility model discloses a kind of displacement sensors, are applied to sensor technical field.Displacement sensor includes: optical transmission unit, displacement unit and photo detecting unit；Optical transmission unit includes the first transmission end and the second transmission end, and the first transmission end connects light source, and the second transmission end connects photo detecting unit；Displacement unit includes the first shift end and second displacement end, and the relative displacement between the first shift end and second displacement end is variable, and the first transmission end of optical transmission unit connects the first shift end, and the first transmission end is moved with the movement of the first shift end；Second transmission end of optical transmission unit connects second displacement end, and the second transmission end is moved with the movement at second displacement end.The displacement sensor can be improved the service life of displacement sensor and reduce the production cost of displacement sensor.
Description
Technical field
The utility model relates to sensor technical field more particularly to a kind of displacement sensors.
Background technique
With fast development scientific and technical in recent years, displacement sensor is answered extensively with the advantages that its sensitivity and high precision
For building, industrial production, the fields such as medical treatment and national defence.What current displacement sensor generallyd use is optical fiber Bragg light
Grid, the bragg wavelength of the optical signal of optical fiber transmission when by analysis displacement parameter variation change to obtain displacement parameter, but
It is that subsequent need be demodulated by equipment such as spectrometer or fiber Bragg grating (FBG) demodulators, there are displacement sensor production cost is higher
Problem.
Utility model content
The main purpose of the utility model embodiment is to provide a kind of displacement sensor, at least to solve in the prior art
The existing above technical problem.
The utility model embodiment provides a kind of displacement sensor, and institute's displacement sensors include: optical transmission unit, position
Move unit and photo detecting unit；The optical transmission unit includes the first transmission end and the second transmission end, and first transmission end connects
Light source is connect, second transmission end connects the photo detecting unit；Institute's displacement unit includes the first shift end and second displacement
End, the relative displacement between first shift end and second displacement end is variable, and the first transmission end of the optical transmission unit connects
First shift end is connect, and first transmission end is moved with the movement of first shift end；The optical transmission unit
The second transmission end connect the second displacement end, and second transmission end is moved with the movement at the second displacement end.
From above-described embodiment it is found that by utilizing the relative displacement between the first shift end of displacement unit and second displacement end
It is related to the displacement information for the device for needing to carry out displacement detecting, first of the bending degree of optical transmission unit and displacement unit
The relative displacement moved between end and second displacement end is related, the intensity of the optical signal of optical transmission unit outgoing and optical transmission unit
Bending degree is related, and the photo detecting unit data that optical signal generates based on the received and the optical signal of optical transmission unit outgoing
Intensity is related, therefore obtains and need subsequently through the variation of the analysis photo detecting unit data that optical signal generates based on the received
The displacement information for carrying out the equipment of displacement detecting, without being demodulated using equipment such as spectrometer or fiber Bragg grating (FBG) demodulators,
To greatly reduce the production cost of displacement sensor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the displacement sensor in first embodiment provided by the utility model；
Fig. 2 is the structural schematic diagram of the displacement sensor in second embodiment provided by the utility model.
Specific embodiment
It, below will knot to enable the purpose of utility model, feature, advantage of the utility model more obvious and understandable
The attached drawing in the utility model embodiment is closed, the technical scheme in the utility model embodiment is clearly and completely described,
Obviously, the described embodiments are only a part of the embodiments of the utility model, and not all embodiments.Based on the utility model
In embodiment, those skilled in the art's every other embodiment obtained without making creative work, all
Belong to the range of the utility model protection.
It is the structural schematic diagram of the displacement sensor in first embodiment provided by the utility model referring to Fig. 1, Fig. 1.Position
Displacement sensor includes optical transmission unit 101, displacement unit 102 and photo detecting unit 103.Optical transmission unit 101 is used for transmission light
Signal, optical transmission unit 101 can be optical fiber.Displacement sensor in the utility model embodiment is mounted on needs and carries out displacement inspection
On the device of survey, when the device for needing to carry out displacement detecting generates displacement information, displacement unit 102 is used for needing to carry out
The displacement information of the device of displacement detecting is mobile.The material of displacement unit 102 can be metal or select according to actual needs.Light is visited
It surveys unit 103 to be used to convert electric signal for received optical signal, in practical applications, photo detecting unit 103 can be photoelectricity two
Pole pipe.
Wherein, optical transmission unit 101 include the first transmission end and the second transmission end, the first transmission end connect light source, second
Transmission end connects photo detecting unit 103, and optical transmission unit 101 is used to receive the light letter from light source 200 by the first transmission end
Number, and exported optical signal by the second transmission end.Displacement unit 102 include the first shift end and second displacement end, first
The relative displacement moved between end and second displacement end is variable, and the first transmission end of optical transmission unit 101 connects the first shift end, and
First transmission end is moved with the movement of the first shift end；Second transmission end of optical transmission unit 101 connects second displacement end, and
Second transmission end is moved with the movement at second displacement end.
Specifically, the first transmission end of optical transmission unit 101 is connected to the first shift end of displacement unit 102, optical transport
Second transmission end of unit 101 is connected to the second displacement end of displacement unit 102, the first shift end of displacement unit 102 and
Relative displacement between two shift ends is variable, then opposite between the first transmission end and the second transmission end of optical transmission unit 101
The bending degree of variable displacement, optical transmission unit 101 is variable.Wherein, the first shift end of displacement unit 102 and second displacement end
Between displacement information can indicate to need to carry out the displacement information of the device of displacement detecting, also referred to as need to carry out spacing inspection
The pitch information of the device of survey.
Wherein, the bending degree of optical transmission unit 101 with the first shift end of displacement unit 102 and second displacement end it
Between relative displacement variation and when changing, the quantity for the guided wave mode for being changed into radiation mode in optical transmission unit 101 can produce
Changing, so that the bending loss that optical transmission unit 101 transmits optical signal can change therewith, so that optical transmission unit 101 exports
The intensity of optical signal can change, the displacement sensor 100 in the present embodiment using optical transmission unit 101 bending loss
Principle can obtain the displacement information for needing to carry out the device of displacement detecting, and structure is simple, can reduce the displacement in the present embodiment
The production cost of sensor.
Wherein, photo detecting unit 103 connects the second transmission end of optical transmission unit 101, then with the of optical transmission unit 101
The photo detecting unit 103 of two transmission end connection is used to receive the optical signal of the outgoing of optical transmission unit 101, and by received optical signal
It is converted into the first sensing data.In practical applications, the bending degree of optical transmission unit 101 changes, optical transmission unit
The bending loss of 101 transmission optical signals changes therewith, then the intensity for the optical signal that photo detecting unit 103 receives becomes
Change, and then the first sensing data that photo detecting unit 103 generates changes, that is, the first sensing that photo detecting unit 103 generates
Data are related to the intensity of optical signal that photo detecting unit 103 obtains, the intensity for the optical signal that photo detecting unit 103 obtains and position
The relative displacement moved between the first shift end and second displacement end of unit 102 is related, then the first sensing data and displacement unit
Relative displacement between 102 the first shift end and second displacement end is related.
In practical applications, the relative displacement between the first shift end and second displacement end of displacement unit 102 becomes
When change, the first transmission end and the second transmission end are connected on the first shift end and second displacement end of displacement unit 102
The bending degree of optical transmission unit 101 changes, and the bending loss for the optical signal that optical transmission unit 101 transmits changes,
The light signal strength that then optical transmission unit 101 is emitted on photo detecting unit 103 changes, and photo detecting unit 103 receives
Light signal strength change, photo detecting unit 103 generate the first sensing data change correspondingly.
It is opposite between the first shift end of displacement unit and second displacement end by utilizing in the utility model embodiment
Be displaced it is related to the displacement information for the device for needing to carry out displacement detecting, the of the bending degree of optical transmission unit and displacement unit
Relative displacement between one shift end and second displacement end is related, the intensity and optical transport list of the optical signal of optical transmission unit outgoing
The bending degree of member is related, and the photo detecting unit data that optical signal generates based on the received and the light of optical transmission unit outgoing are believed
Number intensity it is related, therefore obtained subsequently through the variation of the analysis photo detecting unit data that optical signal generates based on the received
The displacement information for needing to carry out the equipment of displacement detecting, without being solved using equipment such as spectrometer or fiber Bragg grating (FBG) demodulators
It adjusts, to greatly reduce the production cost of displacement sensor.
Referring to fig. 2, Fig. 2 is the structural schematic diagram of the displacement sensor in second embodiment provided by the utility model.Such as
Shown in Fig. 2, unlike the displacement sensor provided in embodiment shown in FIG. 1, in this present embodiment:
Further, displacement sensor further include: data analysis unit 201, data analysis unit 201 connect optical detection list
Member 103.
Specifically, after the optical signal of acquisition is converted to the first sensing data by photo detecting unit 103, by the first sensing data
It is sent to data analysis unit 201, data analysis unit 201 is according to the first sensing data received, according to preset first
Mapping relations or conversion relation between sensing data and the second sensing data obtain corresponding second sensing data.Actually answering
In, data analysis unit 201 can be light power meter.It illustratively, is to reflect between the first sensing data and the second sensing data
Relationship is penetrated, then each value of the first sensing data has the picture uniquely determined in the database of the second sensing data, then counts
After obtaining the first sensing data from photo detecting unit 103 according to analytical unit 201, it can be obtained according to the preset mapping relations and the
Corresponding second sensing data of one sensing data.Alternatively, be conversion relation between the first sensing data and the second sensing data,
After then data analysis unit 201 obtains the first sensing data, what is uniquely determined according to conversion relation acquisition senses number with first
According to corresponding second sensing data.Wherein, the first shift end and second displacement end of the first sensing data and displacement unit 102
Between relative displacement it is related, then the second sensing data corresponding with the first sensing data is for indicating displacement unit 102
Displacement information between first shift end and second displacement end.
Further, the first transmission end of optical transmission unit 101 passes through the mistake on the first shift end of displacement unit 102
Hole, the second transmission end of optical transmission unit 101 passes through the via hole on the second displacement end of displacement unit 102, so that optical transport list
Member 101 is bent, and the bending degree of optical transmission unit 101 is with the variation of relative displacement between the first shift end and second displacement end
And change.
Specifically, the connection type of optical transmission unit 101 and displacement unit 102 can pass for the first of optical transmission unit 101
Defeated end passes through the via hole on the first shift end of displacement unit 102, and the second transmission end of optical transmission unit 101 passes through displacement unit
Via hole on 102 the first shift end, then illustratively, when needing to carry out to generate displacement information on the device of displacement detecting, then
It needs the device for carrying out displacement detecting the wherein region in two regions of relative motion occur to be used as referring at, opposite fortune occurs
Another region in two dynamic regions is used as at activity, and the first transmission end can be fixed on the device reference for needing to carry out displacement detecting
Place, the second transmission end can be fixed at the activity for the device for needing to carry out displacement detecting.When the device for needing to carry out displacement detecting
When being subjected to displacement variation, that is, need the movable place for the device for carrying out displacement detecting relative to the device for needing to carry out displacement detecting
When moving referring at, the relative displacement between the first shift end and second displacement end of displacement unit 102 changes, and light passes
Relative displacement between the first transmission end and the second transmission end of defeated unit 101 changes, so that optical transmission unit 101
Bending.
Further, displacement sensor further includes light emitting unit 202, and light emitting unit 202 has shell, light source 200
It is set to interior of shell；In the shell of the first transmission end insertion light emitting unit 202 of optical transmission unit 101, it is inserted into shell
The first transmission end and light source 200 it is opposite.
Specifically, light emitting unit 202 can be cuboid, it can also be cylindrical body.The material of light emitting unit 202 can be gold
Belong to.Light emitting unit 202 has shell, and light source 200 is set to interior of shell.Light source 200 can be light emitting diode, for sending out
Optical signal is penetrated, then corresponding optical transmission unit 101 can be multimode fibre.First transmission end of optical transmission unit 101 passes through displacement
Via hole on first shift end of unit 102, and be inserted into the shell of light emitting unit 202, the first transmission being inserted into shell
End is opposite with light source 200, then the optical signal that light source 200 emits is transmitted by optical transmission unit 101, and then by photo detecting unit
103 receive and generate the first sensing data.In practical applications, between light source 200 and the first transmission end of optical transmission unit 101
Displacement can select according to actual needs.
Further, photo detecting unit 103 is wrapped up by shell, the second transmission end insertion package light of optical transmission unit 101
In the shell of probe unit 103, the second transmission end and photo detecting unit 103 being inserted into shell are opposite.
Specifically, the shell of package photo detecting unit 103 can be rectangular parallelepiped structure, it can also be cylindrical structure.Wrap up light
The material of the shell of probe unit 103 can be metal.Second transmission end of optical transmission unit 101 passes through the of displacement unit 102
Via hole on two shift ends, and be inserted into the shell of package photo detecting unit 103, the insertion of optical transmission unit 101 is enclosed with light spy
The second transmission end surveyed in the shell of unit 103 is opposite with photo detecting unit 103, then photo detecting unit 103 receives optical transport list
The optical signal of the second transmission end outgoing of member 101 simultaneously generates the first sensing data.In practical applications, photo detecting unit 103 with
Displacement between second transmission end of optical transmission unit 101 can select according to actual needs.
Further, displacement unit 102 is elastic device, and elastic device includes: cavity body structure 1021, bascule
1022, elastomeric element 1023 and fixed link 1024；Bascule 1022 has the first shift end of displacement unit 102, fixed link
The 1024 second displacement ends with displacement unit 102；Cavity body structure 1021 has opposite first end and second end, and cavity
First end opening of structure 1021, elastomeric element 1023 are set to the inside cavity of cavity body structure 1021, and bascule 1022 is worn
The opening for crossing 1021 first end of cavity body structure is connected with one end of elastomeric element 1023, and the other end of elastomeric element 1023 is fixed to be connected
It connects on the inner wall of the second end of cavity body structure 1021；One end of fixed link 1024 is fixedly connected with the second end of cavity body structure 1021
Outer surface.
Specifically, displacement unit 102 is elastic device, elastic device is generated with the device for needing to carry out displacement detecting
Displacement information and generate deformation.Illustratively, if elastic device is compressed spring, elastic device generates deformation when being compressed,
The length of elastic device in its natural state be greater than the length of elastic device under compression, the compression degree of elastic device with
The displacement information for needing to carry out the device generation of displacement detecting is directly proportional；If elastic device is extension spring, elastic device quilt
Deformation is generated when stretching, the length of elastic device in its natural state is less than the length of elastic device in a stretched state, elasticity
The level of stretch of device is directly proportional to the displacement information that the device for needing to carry out displacement detecting generates.Bascule 1022 has position
First shift end of shifting unit 102, second displacement end of the fixed link 1024 with displacement unit 102, and displacement unit 102
Relative displacement between first shift end and second displacement end is variable, then opposite between bascule 1022 and fixed link 1024
Displacement changes correspondingly.The shape of cavity body structure 1021 can be cuboid, can also be cylindrical body, the shape of cavity body structure 1021 can root
It is selected according to actual demand.The material of cavity body structure 1021 can be steel, can also select other metal materials according to actual needs.
Hollow cavity inside cavity body structure 1021 can be identical as the shape of cavity body structure 1021, can not also be identical.Illustratively, cavity
Structure 1021 is cuboid, then it can also be cylindrical body that hollow cavity, which can be cuboid,.Hollow cavity is internally provided with elastomeric element
1023, then it should be understood that the size of hollow cavity is not less than the size of elastomeric element 1023, so that elastomeric element 1023 is in sky
It is smoothly moved in chambers of the heart body.In practical applications, elastomeric element can be helical spring.Cavity body structure 1021 has opposite first
End and second end, the first end of cavity body structure 1021 are provided with opening, and bascule 1022 passes through the first of cavity body structure 1021
The opening at end is connected into the hollow cavity inside cavity body structure 1021 and with one end of elastomeric element 1023, elastomeric element 1023
The other end second end that is fixedly connected on cavity body structure 1021 inner wall on.In practical applications, cavity body structure 1021 is opened
The sectional dimension of mouth is not less than the sectional dimension of bascule 1022.Optionally, cavity body structure 1021 and bascule 1022
Padded coaming can be filled in junction, is made with providing buffering in the movement of the opening of cavity body structure 1021 for bascule 1022
With.
Optionally, the axis of elastomeric element 1023 is parallel with the axis of bascule 1022 or is overlapped, with guarantee activity knot
The moving direction of structure 1022 is consistent with the moving direction of elastomeric element 1023, improves the displacement sensor 100 in the present embodiment
Working efficiency.Fixed link 1024 can be cylindrical body, can also be cuboid, and the shape of fixed link 1024 can be selected according to actual needs
With the material of fixed link 1024 can be steel.Fixed link 1024 is fixedly connected on the outer surface of the second end of cavity body structure 1021
On, then fixed link 1024 and elastomeric element 1023 are located at the two sides of the second end of cavity body structure 1021.In practical applications, movable
Structure 1022 stretches under external force or when elasticity of compression component 1023, between fixed link 1024 and cavity body structure 1021 not
Relative motion occurs, relative motion occurs for fixed link 1024 and bascule 1022.
In practical applications, it when needing to carry out the device generation displacement information of displacement detecting, then will need to carry out displacement inspection
There is the wherein region in two regions of relative motion and is used as referring in the device of survey, occurs in two regions of relative motion
Another region is used as at activity.The other end of fixed link 1024 can be fixed at the reference of device to be detected, bascule 1022
One end outside the cavity body structure 1021 can be fixed at the activity of device to be detected.When needing to carry out displacement detecting
When device generates displacement information, that is, need the movable place for the device for carrying out displacement detecting relative to the dress for needing to carry out displacement detecting
When moving at the reference set, fixed link 1024 and cavity body structure 1021 are sent out at the activity for the device for needing to carry out displacement detecting
Raw relative motion, bascule 1022 at the activity of device to be detected with moving, then bascule 1022 is relative to cavity knot
Structure 1021 and fixed link 1024 move, and one end of elastomeric element 1023 is connected with bascule 1022, elastomeric element
1023 other end is connected with cavity body structure 1021, then one end of elastomeric element 1023 is relative to the another of elastomeric element 1023
End is moved, and then elastomeric element 1023 generates deformation.
Wherein, bascule 1022 has the first shift end of displacement unit 102, and fixed link 1024 has displacement unit
102 second displacement end, and the first transmission end of optical transmission unit 101 passes through the mistake on the first shift end of displacement unit 102
Hole, the second transmission end of optical transmission unit 101 pass through the via hole on the second displacement end of displacement unit 102, then optical transmission unit
101 first end is passed through and is fixed on bascule 1022, and the second end of optical transmission unit 101 passes through and is fixed on fixation
On bar 1024, the junction of optical transmission unit 101 and bascule 1022 is located at the outside of cavity body structure 1021.Actually answering
In, bascule 1022 is moved relative between fixed link 1024, then the first transmission end of optical transmission unit 101 is relative to light
It is moved between second transmission end of transmission unit 101, then the bending degree of optical transmission unit 101 changes.
Further, bascule 1022 includes stretch rod 10221 and connecting plate 10222.Stretch rod 10221 passes through chamber
1021 first end of body structure is simultaneously connected with the side of connecting plate 10222.Connecting plate 10222 is arranged in cavity body structure 1021
Portion, the connecting plate 10222 not connection with stretch rod 10221 and the side opposite with stretch rod 10221 and elastomeric element 1023
One end is connected.The axis of stretch rod 10221 is parallel with the axis of elastomeric element 1023 or is overlapped.The first of optical transmission unit 101
Transmission end is passed through and is fixed on stretch rod 10221, and the junction of optical transmission unit 101 and stretch rod 10221 is located at cavity knot
The outside of structure 1021.
Specifically, bascule 1022 includes stretch rod 10221 and connecting plate 10222, stretch rod 10221 and connecting plate
10222 can be an integral molding structure, can also it is separately fabricated after be attached again.The shape of stretch rod 10221 can be cylindrical body,
Connecting plate 10222 can be circular slab, and the material of stretch rod 10221 and connecting plate 10222 can be selected according to actual needs.
The material of stretch rod 10221 and connecting plate 10222 can be metal.The first end of the insertion cavity body structure 1021 of stretch rod 10221
And be connected with the side of connecting plate 10222, connecting plate 10222 is located at the inside of cavity body structure 1021, the side of connecting plate 10222
Stretch rod 10221 is connected, the other side of connecting plate 10222 connects elastomeric element 1023, then it should be understood that cavity body structure
1021 first end is provided with opening, so that the insertion of stretch rod 10221 and the connecting plate with the inside for being located at cavity body structure 1021
10222 connections, then the sectional dimension of the opening of cavity body structure 1021 is not less than the sectional dimension of stretch rod 10221.Optionally,
Padded coaming can be filled in the junction of stretch rod 10221 and cavity body structure 1021, to be stretch rod 10221 in cavity body structure 1021
On mobile offer buffer function, reduce stretch rod 10221 loss.In practical applications, padded coaming can for cotton or its
He has the material of similar functions.
Wherein, connecting plate 10222 is located inside the cavity body structure 1021, then the size of connecting plate 10222 is less than cavity
The size of 1021 boring cavity of structure, so that connecting plate 10222 smoothly moves in hollow cavity.Elastomeric element 1023
Axis is parallel with the axis of stretch rod 10221 or is overlapped, then the drawing of the moving direction of stretch rod 10221 and elastomeric element 1023
Press direction consistent.In practical applications, relative motion, connecting plate occur between stretch rod 10221 and cavity body structure 1021
10222 move with the movement of stretch rod 10221, then connecting plate 10222 is far from elastomeric element 1023 and cavity body structure 1021
Junction when, elastomeric element 1023 is stretched with the movement of connecting plate 10222, and connecting plate 10222 is close to elastomeric element
1023 with the junction of cavity body structure 1021 when, elastomeric element 1023 is compressed with the movement of connecting plate 10222.
Further, the first transmission end of optical transmission unit 101 is passed through and is fixed on stretch rod 10221, optical transport list
The junction of member 101 and stretch rod 10221 is located at the outside of cavity body structure 1021., then it should be understood that optical transmission unit 101
The first transmission end moved with the movement of stretch rod 10221, and the second transmission end of optical transmission unit 101 is fixed on fixation
On bar 1024, then the first transmission end of optical transmission unit 101 is moved relative to 101 second transmission end of optical transmission unit, then
The bending degree of optical transmission unit 101 changes therewith, and the bending loss that optical transmission unit 101 transmits optical signal becomes therewith
Change, optical transmission unit 101 is emitted to change to the intensity of the optical signal of photo detecting unit 104, and photo detecting unit 104 is received
The intensity of optical signal from optical transmission unit 101 changes, and the first sensing data that photo detecting unit 104 generates becomes
Change, the second sensing data corresponding with the first sensing data that data analysis unit 201 obtains changes, then can be according to number
It can need to carry out the displacement information of the device of displacement detecting according to the second sensing data that analytical unit 201 generates.
Further, the wavelength phase for the optical signal that the wavelength of the received optical signal of photo detecting unit 103 emits with light source 200
Together.Optical transmission unit 101 is the transmission device for being used for transmission optical signal, and the loss of optical transmission unit 101 can be with optical signal
Wavelength and change, therefore the wavelength of the received optical signal of photo detecting unit 103 should with light source 200 emit optical signal wavelength phase
Together, with the accuracy of the intensity of raising measurement optical signal.Illustratively, the received optical signal of photo detecting unit 104 and light source 200
The optical signal of transmitting can be the feux rouges that wavelength is 650nm (unit: nanometer).
Further, optical transmission unit 101 is plastic optical fiber.Illustratively, optical transmission unit 101 includes fibre core and packet
Layer, and external setting matcoveredn, wherein fibre core material can be polymethyl methacrylate, and clad material can be high for fluorination
Polymers, the material of protective layer can be polyethylene.Optionally, optical transmission unit 101 can be multimode stepped-index optical fiber, for receiving
The optical signal that light source 200 emits.Illustratively, the core diameter of optical transmission unit 101 can be 0.98mm (unit: millimeter), packet
Layer diameter can be 1.0mm, and protective layer diameter can be 2.2mm, and the numerical aperture of optical transmission unit 101 can be 0.5, optical transmission unit
101 critical bend radius can be 25mm.Corresponding, the length of cavity body structure 1021 can be 60mm, stretch rod 10221
Length can be 80mm.Wherein, the core diameter of optical transmission unit 101, cladding diameter, protective layer diameter, optical transmission unit 101
The length of numerical aperture, the critical bend radius of optical transmission unit 101, the length of cavity body structure 1021 and stretch rod 10221
Value can be adjusted according to the actual situation.
Wherein, the diameter of optical transmission unit 101 is thicker, thus can greatly reduce light source 200 and photo detecting unit 103 it
Between docking difficulty and continued access loss, reduce displacement sensor needed for structural member dimensional accuracy.The protection of optical transmission unit 101
Layer is relatively large in diameter, and is not required to be sealed again by glue, and can be increased operator and be worn the comfortable of displacement sensor 100
Sense.
In the utility model embodiment, on the one hand, by using the first shift end of displacement unit and second displacement end it
Between relative displacement it is related to the displacement information for the device for needing to carry out displacement detecting, the bending degree of optical transmission unit and displacement
Relative displacement between the first shift end and second displacement end of unit is related, the intensity of the optical signal of optical transmission unit outgoing with
The bending degree of optical transmission unit is related, and the photo detecting unit data that optical signal generates based on the received go out with optical transmission unit
The intensity for the optical signal penetrated is related, therefore subsequently through the change of the analysis photo detecting unit data that optical signal generates based on the received
Change the displacement information for obtaining and needing to carry out the equipment of displacement detecting, without setting using spectrometer or fiber Bragg grating (FBG) demodulator etc.
It is standby to be demodulated, to greatly reduce the production cost of displacement sensor；And the structure of displacement unit is simple, further drops
The low production cost of displacement sensor.On the other hand, optical transmission unit is plastic optical fiber, and the material of plastic optical fiber it is soft,
Resist bending and production cost is low, displacement sensor are mainly used to acquire the displacement information of device to be detected, and optical transmission unit can be with
The compression of displacement unit and be bent, therefore the service life of displacement sensor can be improved and reduce being produced into for displacement sensor
This.
In practical applications, the displacement sensor detection in the present embodiment needs to carry out the displacement of displacement detector generation
The process of information can be as follows:
Displacement sensor generates corresponding first sensing data according to the received optical signal of photo detecting unit of itself.
Specifically, photo detecting unit is connected with the second transmission end of optical transmission unit, then passed with the second of optical transmission unit
The connected photo detecting unit in defeated end is used to receive the optical signal of optical transmission unit outgoing, and converts first for received optical signal
Sensing data.In practical applications, the bending degree of optical transmission unit changes, and optical transmission unit transmits the bending of optical signal
Loss changes therewith, then the intensity for the optical signal that photo detecting unit receives changes, and then photo detecting unit generates
The first sensing data change, that is, photo detecting unit generate the first sensing data and photo detecting unit obtain light believe
Number intensity it is related, the intensity of optical signal and the first shift end of displacement unit that photo detecting unit obtains and second displacement end it
Between relative displacement it is related, then the opposite position between the first sensing data and the first shift end and second displacement end of displacement unit
Phase shift is closed.
First sensing data is that the current signal and/or voltage letter that resulting optical signal generates are received according to photo detecting unit
Number, analyze current signal and/or voltage signal obtain received optical signal op-tical power information.
Specifically, the first sensing data be received according to photo detecting unit current signal that resulting optical signal generates and/
Or voltage signal.Illustratively, photo detecting unit can be photodiode, then photo detecting unit receives the strong of resulting optical signal
When degree changes, photo detecting unit receives at least one of the current signal that resulting optical signal generates and voltage signal letter
Number signal strength indication change therewith, and then the displacement sensor in the present embodiment according in current signal and voltage signal extremely
A kind of op-tical power information of few optical signal that signal analysis obtains changes therewith, then displacement sensor is according to data analysis unit point
Analysis at least one of current signal and voltage signal signal can be obtained received optical signal op-tical power information.
Corresponding second sensing data is obtained according to op-tical power information conversion, as the first sensing data corresponding second passes
Feel data.
Specifically, the second sensing data is used to indicate the displacement between the first shift end of displacement unit and second displacement end
Information, and displacement information is used to indicate to need to carry out the displacement information of the device of displacement detecting.Photo detecting unit is by the light of acquisition
After signal is converted to the first sensing data, the first sensing data is sent to data analysis unit, data analysis unit is according to connecing
The first sensing data received, according between preset first sensing data and the second sensing data mapping relations or by weight of close
System obtains corresponding second sensing data.In practical applications, data analysis unit can be light power meter.
It illustratively, is mapping relations between the first sensing data and the second sensing data, then the first sensing data is every
One value has the picture uniquely determined in the database of the second sensing data, then data analysis unit is obtained from photo detecting unit
After first sensing data, the second sensing data corresponding with the first sensing data can be obtained according to the preset mapping relations.
Alternatively, being conversion relation between the first sensing data and the second sensing data, then data analysis unit obtains the first sensing data
Afterwards, the second sensing data corresponding with the first sensing data uniquely determined is obtained according to the conversion relation.Wherein, it first passes
The relative displacement felt between data and the first shift end and second displacement end of displacement unit is related, then with the first sensing data phase
Corresponding second sensing data is used to indicate the displacement information between the first shift end of displacement unit and second displacement end.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, reference can be made to the related descriptions of other embodiments.
The above are the description of displacement sensor provided by the utility model, for those of ordinary skill in the art, according to
According to the thought of the utility model embodiment, there are change place, to sum up, this specification in specific embodiments and applications
Content should not be construed as a limitation of the present invention.
Claims (10)
1. a kind of displacement sensor, which is characterized in that institute's displacement sensors include: that optical transmission unit, displacement unit and light are visited
Survey unit；
The optical transmission unit includes the first transmission end and the second transmission end, and first transmission end connects light source, and described second
Transmission end connects the photo detecting unit；
Institute's displacement unit includes the first shift end and second displacement end, the phase between first shift end and second displacement end
To variable displacement, the first transmission end of the optical transmission unit connects first shift end, and first transmission end is with institute
It states the movement of the first shift end and moves；Second transmission end of the optical transmission unit connects the second displacement end, and described
Second transmission end is moved with the movement at the second displacement end.
2. displacement sensor according to claim 1, which is characterized in that institute's displacement sensors further include: data analysis
Unit, the data analysis unit connect the photo detecting unit.
3. displacement sensor according to claim 1 or 2, which is characterized in that the first transmission end of the optical transmission unit
Via hole on the first shift end of institute's displacement unit, it is single that the second transmission end of the optical transmission unit passes through the displacement
Via hole on the second displacement end of member, the bending degree of the optical transmission unit with first shift end and second displacement end it
Between relative displacement variation and change.
4. displacement sensor according to claim 3, which is characterized in that institute's displacement sensors further include light emitting list
Member, the light emitting unit have shell, and the light source is set to the interior of shell；First transmission of the optical transmission unit
End is inserted into the shell of the light emitting unit, and the first transmission end being inserted into the shell is opposite with the light source.
5. displacement sensor according to claim 3, which is characterized in that the photo detecting unit is wrapped up by shell, described
The second transmission end insertion of optical transmission unit is wrapped up in the shell of the photo detecting unit, the second transmission being inserted into the shell
It holds opposite with the photo detecting unit.
6. displacement sensor according to claim 3, which is characterized in that institute's displacement unit is elastic device, the bullet
Property device includes: cavity body structure, bascule, elastomeric element and fixed link；The bascule has institute's displacement unit
First shift end, the fixed link have the second displacement end of institute's displacement unit；
The cavity body structure has opposite first end and second end, and the first end opening of the cavity body structure, the elasticity
Component is set to the inside cavity of the cavity body structure, and the bascule passes through opening and the institute of the cavity body structure first end
The one end for stating elastomeric element is connected, and the other end of the elastomeric element is fixedly connected on the inner wall of the second end of the cavity body structure
On；One end of the fixed link is fixedly connected with the outer surface of the second end of the cavity body structure.
7. displacement sensor according to claim 6, which is characterized in that the bascule includes stretch rod and connection
Plate, the stretch rod pass through the first end of the cavity body structure and are connected with the side of the connecting plate, the connecting plate setting
In the inside of the cavity body structure, the connecting plate is not connected with the stretch rod and the side and institute opposite with the stretch rod
The one end for stating elastomeric element is connected.
8. displacement sensor according to claim 7, which is characterized in that the first end of the optical transmission unit passes through and consolidates
It is scheduled on the stretch rod, the junction of the optical transmission unit and the stretch rod is located at the outside of the cavity body structure.
9. displacement sensor according to claim 1 or 2, which is characterized in that the received optical signal of photo detecting unit
Wavelength it is identical as the wavelength for the optical signal that the light source emits.
10. displacement sensor according to claim 1 or 2, which is characterized in that the optical transmission unit is plastic optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820608085.5U CN208671917U (en) | 2018-04-25 | 2018-04-25 | Displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820608085.5U CN208671917U (en) | 2018-04-25 | 2018-04-25 | Displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208671917U true CN208671917U (en) | 2019-03-29 |
Family
ID=65822113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820608085.5U Active CN208671917U (en) | 2018-04-25 | 2018-04-25 | Displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208671917U (en) |
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2018
- 2018-04-25 CN CN201820608085.5U patent/CN208671917U/en active Active
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