CN108362209A - Displacement sensor and displacement detecting method - Google Patents
Displacement sensor and displacement detecting method Download PDFInfo
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- CN108362209A CN108362209A CN201810377257.7A CN201810377257A CN108362209A CN 108362209 A CN108362209 A CN 108362209A CN 201810377257 A CN201810377257 A CN 201810377257A CN 108362209 A CN108362209 A CN 108362209A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- 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
- G01D5/32—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 with attenuation or whole or partial obturation of beams of light
- G01D5/34—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
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- Length Measuring Devices By Optical Means (AREA)
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Abstract
The invention discloses a kind of displacement sensor and displacement detecting methods, are applied to sensor technical field.The 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 is for connecting light source, and the second transmission end is for connecting 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 is moved with the movement of the first shift end.The second transmission end connection second displacement end of optical transmission unit, and moved with the movement at second displacement end.Photo detecting unit, the optical signal for receiving the output of the second transmission end, and corresponding first sensing data is generated according to the optical signal of reception.The displacement sensor can be improved the service life of displacement sensor and reduce the production cost of displacement sensor.
Description
Technical field
The present invention relates to sensor technical field more particularly to a kind of displacement sensors and displacement detecting method.
Background technology
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.Current displacement sensor generally use is optical fiber Bragg light
The bragg wavelength of grid, the optical signal of optical fiber transmission when by analyzing displacement parameter variation changes to obtain displacement parameter, but
It is that need to subsequently be demodulated by equipment such as spectrometer or fiber Bragg grating (FBG) demodulators, there are displacement sensor production cost is higher
Problem.
Invention content
The main purpose of the embodiment of the present invention is to provide a kind of displacement sensor and displacement detecting method, at least to solve
The above technical problem existing in the prior art.
First aspect of the embodiment of the present invention provides a kind of displacement sensor, and institute's displacement sensors include：Optical transport list
Member, displacement unit and photo detecting unit；The optical transmission unit includes the first transmission end and the second transmission end, first transmission
End is for connecting light source, and second transmission end is for connecting the photo detecting unit, and the optical transmission unit is for passing through institute
It states the first transmission end and receives the optical signal from the light source, and exported the optical signal by second transmission end；Institute
Displacement unit includes the first shift end and second displacement end, the relative displacement between first shift end and second displacement end
Variable, the first transmission end of the optical transmission unit connects first shift end, and first transmission end is with described first
The movement of shift end and move；Second transmission end of the optical transmission unit connects the second displacement end, and described second passes
It is moved with the movement at the second displacement end at defeated end；The photo detecting unit, for receiving the second transmission end output
Optical signal, and corresponding first sensing data is generated according to the optical signal of reception, wherein the light letter that the photo detecting unit obtains
Number intensity change, first sensing data with the variation of relative displacement between first shift end and second displacement end
Value change with the variation of the light signal strength.
Second aspect of the embodiment of the present invention provides a kind of displacement detecting method, is applied to such as first party of the embodiment of the present invention
Displacement sensor described in face, institute's displacement sensors are mounted on the device for needing to carry out displacement detecting, the method includes：
Institute's displacement sensors generate corresponding first sensing data according to the optical signal that the photo detecting unit of itself receives；The displacement
Sensor according to first sensing data, and mapping relations based on preset first sensing data and the second sensing data or
Conversion relation, obtains corresponding second sensing data, and second sensing data is used to indicate first of institute's displacement unit
The displacement information between end and second displacement end is moved, and institute's displacement information is used to indicate the dress for needing to carry out displacement detecting
The displacement information set.
From above-described embodiment it is found that receiving the optical signal of optical transmission unit outgoing by using photo detecting unit and being converted into
First sensing data, and the intensity phase for the optical signal that the first sensing data of photo detecting unit conversion is emitted with optical transmission unit
It closes, the intensity of the optical signal of optical transmission unit outgoing is related to the bending degree of optical transmission unit, the bending journey of optical transmission unit
Degree is related to the relative displacement between the first shift end of displacement unit and second displacement end, the first shift end of displacement unit and the
Relative displacement between two shift ends is related to the progress displacement information of device of displacement detecting is needed, therefore subsequently through data
Analytic unit can obtain the variation of the first sensing data, and then obtain the displacement information for the equipment for needing to carry out displacement detecting,
Without being demodulated using equipment such as spectrometer or fiber Bragg grating (FBG) demodulators, to greatly reduce the production of displacement sensor
Cost.
Description of the drawings
Fig. 1 is the structural schematic diagram of the displacement sensor in first embodiment provided by the invention；
Fig. 2 is the structural schematic diagram of the displacement sensor in second embodiment provided by the invention；
Fig. 3 is the implementation process schematic diagram of the displacement detecting method in 3rd embodiment provided by the invention.
Specific implementation mode
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described reality
It is only a part of the embodiment of the present invention to apply example, and not all embodiments.Based on the embodiments of the present invention, people in the art
The every other embodiment that member is obtained without making creative work, shall fall within the protection scope of the present invention.
It is the structural schematic diagram of the displacement sensor in first embodiment provided by the invention referring to Fig. 1, Fig. 1.Displacement passes
Sensor includes optical transmission unit 101, displacement unit 102 and photo detecting unit 103.Optical transmission unit 101 is used for transmission optical signal,
Optical transmission unit 101 can be optical fiber.Displacement sensor in the embodiment of the present invention is mounted on the device for needing to carry out displacement detecting
On, when need carry out displacement detecting device generate displacement information when, displacement unit 102 be used for need carry out displacement detecting
Device displacement information movement.The material of displacement unit 102 can be metal or be selected according to actual demand.Photo detecting unit
103 for converting the optical signal of reception to electric signal, and in practical applications, photo detecting unit 103 can be photodiode.
Wherein, optical transmission unit 101 includes the first transmission end and the second transmission end, and the first transmission end is used to connect light source,
For second transmission end for connecting photo detecting unit 103, optical transmission unit 101, which is used to receive by the first transmission end, comes from light source
200 optical signal, and exported optical signal by the second transmission end.Displacement unit 102 includes the first shift end and second displacement
End, the relative displacement between the first shift end and second displacement end is variable, the first transmission end connection first of optical transmission unit 101
Shift end, and the first transmission end is moved with the movement of the first shift end；The second transmission end connection second of optical transmission unit 101
Shift end, and the second transmission end is moved with the movement at second displacement end；Photo detecting unit 103, for receiving the second transmission end
The optical signal of output, and corresponding first sensing data is generated according to the optical signal of reception, wherein photo detecting unit 103 obtains
The intensity of optical signal change with the variation of relative displacement between the first shift end and second displacement end, the first sensing data
Value changes with the variation of light signal strength.
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 examine into line space
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, to which the bending loss that optical transmission unit 101 transmits optical signal can change therewith, to which 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 the device for needing to carry out displacement detecting, simple in structure, 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 the optical signal of reception
It is converted into the first sensing data.In practical applications, the bending degree of optical transmission unit 101 changes, optical transmission unit 101
The bending loss of transmission optical signal changes therewith, then the intensity for the optical signal that photo detecting unit 103 receives changes,
And then the first sensing data that photo detecting unit 103 generates changes, that is, the first sensing number that photo detecting unit 103 generates
It is related according to the intensity of optical signal obtained to photo detecting unit 103, the intensity for the optical signal that photo detecting unit 103 obtains and displacement
Relative displacement between the first shift end and second displacement end of unit 102 is related, then the first sensing data and displacement unit 102
The first shift end and second displacement end between relative displacement it 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.
In embodiments of the present invention, it receives the optical signal of optical transmission unit outgoing by using photo detecting unit and is converted into
First sensing data, and the intensity phase for the optical signal that the first sensing data of photo detecting unit conversion is emitted with optical transmission unit
It closes, the intensity of the optical signal of optical transmission unit outgoing is related to the bending degree of optical transmission unit, the bending journey of optical transmission unit
Degree is related to the relative displacement between the first shift end of displacement unit and second displacement end, the first shift end of displacement unit and the
Relative displacement between two shift ends is related to the progress displacement information of device of displacement detecting is needed, therefore subsequently through data
Analytic unit can obtain the variation of the first sensing data, and then obtain the displacement information for the equipment for needing to carry out displacement detecting,
Without being demodulated using equipment such as spectrometer or fiber Bragg grating (FBG) demodulators, to greatly reduce the production of displacement sensor
Cost.
It is the structural schematic diagram of the displacement sensor in second embodiment provided by the invention referring to Fig. 2, Fig. 2.Such as Fig. 2 institutes
Show, unlike the displacement sensor provided in embodiment shown in FIG. 1, in this present embodiment：
Further, displacement sensor further includes：Data analysis unit 201 connects photo detecting unit 103, is used for basis
The first sensing data that photo detecting unit 103 generates, and based on the mapping of preset first sensing data and the second sensing data
Relationship or conversion relation, obtain corresponding second sensing data, and the second sensing data is used to indicate first of displacement unit 102
Move the displacement information between end and second displacement end.
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.Illustratively, it 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
According to analytic unit 201 after photo detecting unit 103 obtains the first sensing data, 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, first shift end and second displacement end of first sensing data with 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 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 be the first biography of optical transmission unit 101
Defeated end passes through the via on the first shift end of displacement unit 102, the second transmission end of optical transmission unit 101 to pass through displacement unit
Via 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 wherein region that the device for carrying out displacement detecting occurs in two regions of relative motion to be used as with reference 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 progress displacement detecting
When being subjected to displacement variation, that is, need the movable place for carrying out the device of displacement detecting relative to the device for needing progress displacement detecting
When being moved with reference 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 enclosure；First transmission end of optical transmission unit 101 passes through the via on the first shift end of displacement unit 102,
And be inserted into the shell of light emitting unit 202, the first transmission end being inserted into shell is opposite with light source 200.
Specifically, light emitting unit 202 can be cuboid or cylinder.The material of light emitting unit 202 can be gold
Belong to.There is light emitting unit 202 shell, light source 200 to be set to enclosure.Light source 200 can be light emitting diode, for emitting
Optical signal, then corresponding optical transmission unit 101 can be multimode fibre.First transmission end of optical transmission unit 101 passes through displacement list
Via on first shift end of member 102, and be inserted into the shell of light emitting unit 202, the first transmission end being inserted into shell
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
It receives and generates the first sensing data.In practical applications, between light source 200 and the first transmission end of optical transmission unit 101
Displacement can be selected according to actual demand.
Further, photo detecting unit 103 is wrapped up by shell, and the second transmission end of optical transmission unit 101 passes through displacement list
Via on the second displacement end of member 102, and be inserted into the shell of package photo detecting unit 103, second be inserted into shell passes
Defeated end is opposite with photo detecting unit 103.
Specifically, the shell of package photo detecting unit 103 can be rectangular parallelepiped structure or 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 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 be selected according to actual demand.
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 knot
First end opening of structure 1021, elastomeric element 1023 are set to the inside cavity of cavity body structure 1021, and bascule 1022 passes through
The opening of 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 fixedly connected
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 with the device generation for needing progress 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 more than the length of elastic device under compression, the compression degree of elastic device with
Need the displacement information that the device for carrying out displacement detecting generates 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 carrying out displacement detecting generates is needed.Bascule 1022 has position
Move the first shift end of unit 102, fixed link 1024 has a second displacement end of displacement unit 102, and the of displacement unit 102
Relative displacement between one shift end and second displacement end is variable, then the opposite position between bascule 1022 and fixed link 1024
Shifting changes correspondingly.The shape of cavity body structure 1021 can be cuboid or cylinder, and the shape of cavity body structure 1021 can basis
Actual demand is selected.The material of cavity body structure 1021 can be steel, and other metal materials can be also selected according to actual demand.Chamber
Hollow cavity inside body structure 1021 can be identical as the shape of cavity body structure 1021, can also differ.Illustratively, cavity knot
Structure 1021 is cuboid, then hollow cavity can be cuboid or cylinder.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
The first end of end and second end, cavity body structure 1021 is 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 overlaps, 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 cylinder or cuboid, and the shape of fixed link 1024 can be selected according to actual demand
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 is located at the both sides of the second end of cavity body structure 1021 with elastomeric element 1023.In practical applications, movable
Structure 1022 stretches or under external force when elasticity of compression component 1023, is not sent out between fixed link 1024 and cavity body structure 1021
With bascule 1022 relative motion occurs for raw relative motion, fixed link 1024.
In practical applications, it when the device for carrying out displacement detecting being needed to generate displacement information, then will need to carry out displacement inspection
There is the wherein region in two regions of relative motion and is used as with reference in the device of survey, in two regions for relative motion occur
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 carrying out the device of displacement detecting relative to the dress for needing progress displacement detecting
When being moved 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 the other end of the one end of elastomeric element 1023 relative to elastomeric element 1023
It moves, and then elastomeric element 1023 generates deformation.
Wherein, there is bascule 1,022 first shift end of displacement unit 102, fixed link 1024 to have 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 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 fixed link
On 1024, the junction of optical transmission unit 101 and bascule 1022 is located at the outside of cavity body structure 1021.In practical application
In, bascule 1022 moves between fixed link 1024, then the first transmission end of optical transmission unit 101 is passed relative to light
It is moved between second transmission end of defeated unit 101, then the bending degree of optical transmission unit 101 changes.
Optionally, bascule 1022 includes stretch rod 10221 and connecting plate 10222.Stretch rod 10221 passes through cavity knot
1021 first end of structure is simultaneously connected with the side of connecting plate 10222.Connecting plate 10222 is arranged in the inside of cavity body structure 1021, even
Fishplate bar 10222 not with the connection of stretch rod 10221 and one end phase of the side and elastomeric element 1023 opposite with stretch rod 10221
Even, the axis of stretch rod 10221 is parallel with the axis of elastomeric element 1023 or overlaps.First transmission end of optical transmission unit 101
It passes through and is fixed on stretch rod 10221, optical transmission unit 101 and the junction of stretch rod 10221 are located at cavity body structure 1021
Outside.
Wherein, bascule 1022 includes stretch rod 10221 and connecting plate 10222, stretch rod 10221 and connecting plate
10222 can be an integral molding structure, also can it is separately fabricated after be attached again.The shape of stretch rod 10221 can be cylinder, even
Fishplate bar 10222 can be circular slab, and the material of stretch rod 10221 and connecting plate 10222 can be selected according to actual demand.It stretches
The material of bar 10221 and connecting plate 10222 can be metal.Stretch rod 10221 be inserted into cavity body structure 1021 first end and with
The side of connecting plate 10222 is connected, and connecting plate 10222 is located at the inside of cavity body structure 1021, the side connection of connecting plate 10222
Stretch rod 10221, the other side of connecting plate 10222 connect elastomeric element 1023, then it should be understood that the of cavity body structure 1021
One end is provided with opening, so that stretch rod 10221 is inserted into and connects with the connecting plate 10222 positioned at the inside of cavity body structure 1021
It connects, then the sectional dimension of the opening of cavity body structure 1021 is not less than the sectional dimension of stretch rod 10221.Optionally, stretch rod
10221 can be filled padded coaming with the junction of cavity body structure 1021, with the shifting for stretch rod 10221 on cavity body structure 1021
It is dynamic that cushioning effect is provided, reduce the loss of stretch rod 10221.In practical applications, padded coaming can be cotton or other have
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 overlaps, then the tension and compression of the moving direction of stretch rod 10221 and elastomeric element 1023
Direction is consistent.In practical applications, occur relative motion between stretch rod 10221 and cavity body structure 1021, connecting plate 10222 with
It the movement of stretch rod 10221 and moves, then junction of the connecting plate 10222 far from elastomeric element 1023 Yu cavity body structure 1021
When, elastomeric element 1023 is stretched with the movement of connecting plate 10222, and connecting plate 10222 is close to elastomeric element 1023 and cavity
When the junction of structure 1021, elastomeric element 1023 is compressed with the movement of connecting plate 10222.
Wherein, the first transmission end of optical transmission unit 101 is passed through and is fixed on stretch rod 10221, optical transmission unit 101
It is located at the outside of cavity body structure 1021 with the junction of stretch rod 10221, then it should be understood that the first of optical transmission unit 101
Transmission end is moved with the movement of stretch rod 10221, and the second transmission end of optical transmission unit 101 is fixed on fixed link 1024
On, then the first transmission end of optical transmission unit 101 is moved relative to 101 second transmission end of optical transmission unit, then optical transport
The bending degree of unit 101 changes therewith, and the bending loss that optical transmission unit 101 transmits optical signal changes therewith, and light passes
Defeated unit 101 is emitted to change to the intensity of the optical signal of photo detecting unit 104, and what photo detecting unit 104 received comes from light
The intensity of the optical signal of transmission unit 101 changes, and the first sensing data that photo detecting unit 104 generates changes, number
The second sensing data corresponding with the first sensing data obtained according to analytic unit 201 changes, then can be according to data point
The second sensing data that analysis unit 201 generates can need to carry out the displacement information of the device of displacement detecting.
Further, the wavelength phase for the optical signal that the wavelength for the optical signal that photo detecting unit 103 receives 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 photo detecting unit 103 receive optical signal wavelength should with light source 200 emit optical signal wavelength phase
Together, to improve the accuracy for the intensity for measuring optical signal.Illustratively, the optical signal and light source 200 that photo detecting unit 104 receives
The optical signal of transmitting can be that wavelength is 650nm (units：Nanometer) feux rouges.
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 that fluorination is high
The material of polymers, protective layer can be polyethylene.Optionally, optical transmission unit 101 can be multimode stepped-index optical fiber, for receiving light
The optical signal that source 200 emits.Illustratively, the core diameter of optical transmission unit 101 can be 0.98mm (units：Millimeter), covering
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 actual conditions.
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 embodiments of the present invention, on the one hand, the optical signal of optical transmission unit outgoing is received by using photo detecting unit
And it is converted into the first sensing data, and the first sensing data of photo detecting unit conversion and the optical signal of optical transmission unit outgoing
Intensity is related, and the intensity of the optical signal of optical transmission unit outgoing is related to the bending degree of optical transmission unit, optical transmission unit
Relative displacement between bending degree and the first shift end of displacement unit and second displacement end is related, first of displacement unit
The relative displacement moved between end and second displacement end is related to the progress displacement information of device of displacement detecting is needed, therefore passes through
Data analysis unit can obtain the variation of the first sensing data, and then obtain the displacement information of device to be detected, without profit
It is demodulated with equipment such as spectrometer or fiber Bragg grating (FBG) demodulators, to greatly reduce the production cost of displacement sensor.And
And the structure of displacement unit is simple, further reduced the production cost of displacement sensor.On the other hand, optical transmission unit is modeling
Expect optical fiber, and the material of plastic optical fiber is soft, resist bending and production cost are low, displacement sensor is mainly used to acquire dress to be detected
The displacement information set, optical transmission unit can be bent with the compression of displacement unit, therefore the use of displacement sensor can be improved
Service life and the production cost for reducing displacement sensor.
It is the implementation process schematic diagram of the displacement detecting method in 3rd embodiment provided by the invention referring to Fig. 3, Fig. 3,
Applied to the displacement sensor in embodiment as depicted in figs. 1 and 2, which, which is mounted on, needs to carry out displacement detecting
Device on.As shown in figure 3, this method mainly includes the following steps that：
301, displacement sensor generates corresponding first sensing data according to the optical signal that the photo detecting unit of itself receives.
Specifically, in the displacement sensor of the embodiment of the present invention, the second transmission of photo detecting unit and optical transmission unit
End is connected, then the photo detecting unit being connected with the second transmission end of optical transmission unit is used to receive the light letter of optical transmission unit outgoing
Number, and convert the optical signal of reception to the first sensing data.In practical applications, the bending degree of optical transmission unit becomes
Change, optical transmission unit transmission optical signal bending loss change therewith, then the optical signal that photo detecting unit receives it is strong
Degree changes, and then the first sensing data that photo detecting unit generates changes, that is, the first biography that photo detecting unit generates
Feel the intensity and displacement list of the optical signal that data are related to the intensity for the optical signal that photo detecting unit obtains, and photo detecting unit obtains
Relative displacement between the first shift end and second displacement end of member is related, then first of the first sensing data and displacement unit
The relative displacement moved between end and second displacement end is related.
302, the first sensing data is the current signal and/or electricity for receiving the optical signal of gained according to photo detecting unit and generating
Signal is pressed, current signal is analyzed and/or voltage signal obtains the op-tical power information of received optical signal.
Specifically, the first sensing data be according to photo detecting unit receive gained optical signal generate current signal and/
Or voltage signal.Illustratively, photo detecting unit can be photodiode, then photo detecting unit receives the strong of the optical signal of gained
When degree changes, photo detecting unit receives at least one of current signal and the voltage signal of the optical signal generation of gained letter
Number signal strength values 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 the op-tical power information of received optical signal.
303, corresponding second sensing data is obtained according to op-tical power information conversion, as the first sensing data corresponding the
Two sensing datas.
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 conversion close
System obtains corresponding second sensing data.In practical applications, data analysis unit can be light power meter.
Illustratively, it 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
Feel data it is related with the relative displacement between the first shift end of displacement unit and second displacement end, 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 embodiments of the present invention, on the one hand, the optical signal of optical transmission unit outgoing is received by using photo detecting unit
And it is converted into the first sensing data, and the first sensing data of photo detecting unit conversion and the optical signal of optical transmission unit outgoing
Intensity is related, and the intensity of the optical signal of optical transmission unit outgoing is related to the bending degree of optical transmission unit, optical transmission unit
Relative displacement between bending degree and the first shift end of displacement unit and second displacement end is related, first of displacement unit
The relative displacement moved between end and second displacement end is related to the progress displacement information of device of displacement detecting is needed, therefore follow-up
The variation of the first sensing data can be obtained by data analysis unit, and then obtains the displacement information of device to be detected, without
It need to be demodulated using equipment such as spectrometer or fiber Bragg grating (FBG) demodulators, to greatly reduce being produced into for displacement sensor
This.And the structure of displacement unit is simple, further reduced the production cost of displacement sensor.On the other hand, optical transport list
Member is plastic optical fiber, and the material of plastic optical fiber is soft, resist bending and production cost are low, and displacement sensor, which is mainly used to acquisition, to be waited for
The displacement information of detection device, optical transmission unit can be bent with the compression of displacement unit, therefore displacement sensor can be improved
Service life and reduce the production cost of displacement sensor.
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, it may refer to the associated description of other embodiment.
It is the description of displacement sensor provided by the present invention and displacement detecting method above, for the general skill of this field
Art personnel, the thought of embodiment, there is change place in specific embodiments and applications according to the present invention, to sum up, this
Description should not be construed as limiting the invention.
Claims (10)
1. a kind of displacement sensor, which is characterized in that institute's displacement sensors include：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 is described for connecting light source
Second transmission end is used to come from by first transmission end reception for connecting the photo detecting unit, the optical transmission unit
The optical signal of the light source, and exported the optical signal by second transmission end；
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；
The photo detecting unit, the optical signal for receiving the second transmission end output, and generated according to the optical signal of reception
Corresponding first sensing data, wherein the intensity for the optical signal that the photo detecting unit obtains is with first shift end and the
The variation of relative displacement between two shift ends and change, the value of first sensing data with the light signal strength variation
And change.
2. displacement sensor according to claim 1, which is characterized in that institute's displacement sensors further include：Data analysis
Unit connects the photo detecting unit, the first sensing data for being generated according to the photo detecting unit, and based on preset
The mapping relations or conversion relation of first sensing data and the second sensing data, obtain corresponding second sensing data, and described the
Two sensing datas are used to indicate the displacement information between the first shift end and second displacement end of institute's displacement unit.
3. displacement sensor according to claim 1 or 2, which is characterized in that the first transmission end of the optical transmission unit
Second transmission end of the via on the first shift end of institute's displacement unit, the optical transmission unit passes through the displacement list
Via on the second displacement end of member, so that the optical transmission unit is bent, and the bending degree of the optical transmission unit is with institute
It states the variation of relative displacement between the first shift end and second displacement end and changes.
4. displacement sensor according to claim 3, which is characterized in that institute's displacement sensors further include light emitting list
There is shell, the light source to be set to the enclosure for member, the light emitting unit；First transmission of the optical transmission unit
The via on the first shift end of institute's displacement unit is held, and is inserted into the shell of the light emitting unit, described in insertion
The first transmission end in 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
Second transmission end of optical transmission unit passes through the via on the second displacement end of institute's displacement unit, and is inserted into the package light and visits
It surveys in the shell of unit, the second transmission end being inserted into the shell is 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 1 or 2, which is characterized in that the optical signal that the photo detecting unit receives
Wavelength it is identical as the wavelength for the optical signal that the light source emits.
8. displacement sensor according to claim 1 or 2, which is characterized in that the optical transmission unit is plastic optical fiber.
9. a kind of displacement detecting method, which is characterized in that be applied to such as displacement sensing described in any item of the claim 1 to 8
Device, institute's displacement sensors are mounted on the device for needing to carry out displacement detecting, the method includes：
Institute's displacement sensors generate corresponding first sensing data according to the optical signal that the photo detecting unit of itself receives；
Institute's displacement sensors are based on preset first sensing data and the second sensing data according to first sensing data
Mapping relations or conversion relation, obtain corresponding second sensing data, second sensing data is for indicating the displacement
Displacement information between the first shift end and second displacement end of unit, and institute's displacement information needs to carry out for indicating described
The displacement information of the device of displacement detecting.
10. displacement detecting method according to claim 9, which is characterized in that first sensing data is according to
Photo detecting unit receives the current signal and/or voltage signal that the optical signal of gained generates,
Institute's displacement sensors are based on preset first sensing data and the second sensing data according to first sensing data
Mapping relations or conversion relation, obtain corresponding second sensing data, including：
It analyzes the current signal and/or voltage signal obtains the op-tical power information of received optical signal；
Corresponding second sensing data is obtained according to op-tical power information conversion, as described first sensing data corresponds to
The second sensing data.
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| CN109443281A (en) * | 2018-12-04 | 2019-03-08 | 浙江农林大学 | A kind of tree breast-height diameter monitoring method and device |
| CN110367955A (en) * | 2019-08-19 | 2019-10-25 | 深圳市矽赫科技有限公司 | Fibre optical sensor and detection device for vital signs |
| CN113916184A (en) * | 2021-10-25 | 2022-01-11 | 中国电建集团成都勘测设计研究院有限公司 | Improved multipoint displacement meter sensor connecting device and connecting method thereof |
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| CN108362209B (en) | 2024-04-16 |
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