CN108872952A - A kind of reflective optical fiber displacement sensor situ calibration system and method - Google Patents
A kind of reflective optical fiber displacement sensor situ calibration system and method Download PDFInfo
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- CN108872952A CN108872952A CN201810393361.5A CN201810393361A CN108872952A CN 108872952 A CN108872952 A CN 108872952A CN 201810393361 A CN201810393361 A CN 201810393361A CN 108872952 A CN108872952 A CN 108872952A
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- optical fiber
- displacement sensor
- target stand
- reflective optical
- fibre
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
Abstract
The invention discloses a kind of reflective optical fiber displacement sensor situ calibration system and method, system includes：Workbench, reflective optical fiber displacement sensor, laser displacement sensor, target stand and central processing unit, reflective optical fiber displacement sensor, laser displacement sensor, target stand are arranged at the top of workbench, and connect with central processing unit；The present invention is stored after shift value and the accurate clock synchronization of voltage value using laser displacement sensor as reference, so that the measurement point of the corresponding calibration curve generated is more, effectively increases the accuracy of the generated calibration curve of subsequent process of fitting treatment；Reflective optical fiber displacement sensor includes fibre-optical probe, the launching fiber, reference optical fiber and reception optical fiber of coaxial setting are provided in fibre-optical probe, launching fiber and the arrangement of reception optical fiber coaxial multi-layer, and reference optical fiber is set, the sensitivity and resolution ratio for increasing reflective optical fiber displacement sensor, improve its working performance.
Description
Technical field
The present invention relates to reflection type optical fiber displacement sensing technical fields, more particularly to a kind of reflection type optical fiber displacement sensing
Device situ calibration system and method.
Background technique
Reflection type optical fiber displacement sensing technology be it is a kind of with continuous light source for measurement carrier, light intensity is measuring signal, optical fiber
Differentiate by perceiving measured signal for propagation medium and receive signal and transmitting signal relation, to obtain testee displacement
Measuring technique (bibliography：Cong Hong, reflection type optical fiber micro-displacement sensor .2003).Compared with other displacement sensors, optical fiber
Displacement sensor have high frequency sound (high sensitivity), non-cpntact measurement, small in size, structure is simple, anti-electrical measurement interference, be suitable for it is soft
The features such as soft object, therefore be widely used.
But the influence due to being reflected face shape and tested surface material, even the same sensor is measuring not
When with object, output voltage-displacement curve can generally also be very different.So fibre optical sensor producer is selling its product
When generally also can only provide the voltage-displacement curve schematic diagram an of medelling, when application, needs user according to specifically used
The property of environment, especially reflecting surface is demarcated.When testee or measurement environment frequently change, this calibration is just
It needs to be repeated.
Therefore it provides a kind of reflective optical fiber displacement sensor situ calibration system and method, to solve prior art institute
Existing disadvantages mentioned above becomes technical problem now urgently to be resolved.
Summary of the invention
The object of the present invention is to provide a kind of reflective optical fiber displacement sensor situ calibration system and methods, on solving
Problem of the existing technology is stated, a situ calibration system and method high-precision, suitable for different conditioned reflexes is established,
And improve the sensitivity and measurement accuracy of reflective optical fiber displacement sensor.
To achieve the above object, the present invention provides following schemes：The present invention provides a kind of reflection type optical fiber displacement sensing
Device situ calibration system, including：Workbench, reflective optical fiber displacement sensor, laser displacement sensor, target stand and centre
Manage device；The reflective optical fiber displacement sensor, laser displacement sensor, target stand are arranged at the top of the workbench, and
It is connect with the central processing unit；The reflective optical fiber displacement sensor and the laser displacement sensor are arranged side by side, institute
Stating reflective optical fiber displacement sensor includes the fibre-optical probe being arranged in front of it, and coaxial setting is provided in the fibre-optical probe
Launching fiber, reference optical fiber and reception optical fiber；The target stand for installing determinand, and be located on the workbench with it is described
The opposite side of fibre-optical probe, the target stand are slidably connected with the workbench.
Preferably, the reflective optical fiber displacement sensor further includes light source and photodetector, the launching fiber with
The light source connection, the reference optical fiber and reception optical fiber are connect with the photodetector.
Preferably, the upper center of the target stand is provided with mounting base, and the mounting base includes for limiting determinand
The limit plate of tested surface and fixing clamp for fixing determinand, the fixing clamp are located at the limit plate and visit far from the optical fiber
The side of head.
Preferably, guide rail is provided with above the workbench, the bottom of the target stand passes through the guide rail and the work
It is slidably connected as platform；The target stand is provided with stepper motor far from the side of the fibre-optical probe, and the stepper motor passes through silk
Thick stick drives the target stand movement.
Preferably, the central processing unit includes pretreatment unit, driving unit, measuring unit, drawing unit and display
Device, the driving unit respectively with the pretreatment unit, the measuring unit couple, the measuring unit also with the drafting
Unit coupling, the display are connect with the drawing unit signal.
Preferably, the reference optical fiber and reception optical fiber are provided with multiple, and multiple reference optical fibers surround the hair
The outside setting of optical fiber is penetrated, multiple reception optical fibers are arranged around the reference optical fiber.
Preferably, the launching fiber and reception optical fiber are provided with multiple, and multiple launching fibers surround the ginseng
The outside setting of optical fiber is examined, multiple reception optical fibers are arranged around the launching fiber.
Preferably, the light source is semiconductor laser, wavelength 600-650nm；The driving circuit of the light source uses
DC driven or pulsed drive.
The present invention also provides a kind of reflective optical fiber displacement sensor situ calibration methods, include the following steps:
1), determinand is mounted in the mounting base above target stand, the tested surface of determinand, fixing clamp are limited with limit plate
Fixed determinand, connects system power supply；
2), whether pretreatment unit monitoring target stand is in the effective of laser displacement sensor and reflective optical fiber displacement sensor
In range；If it is effective to laser displacement sensor and reflective optical fiber displacement sensor to adjust target stand not in useful range
In range ability；
3), when target stand is adjusted within the scope of the useful range of laser displacement sensor and reflective optical fiber displacement sensor,
Pretreatment unit presets predetermined movement speed, preset movement distance and the predetermined moving direction of target stand；
4), driving unit control stepper motor is driven by predetermined movement speed, preset movement distance and predetermined moving direction
The movement of moving-target seat；
5), measuring unit calculates the practical movement speed of target stand, judges that practical movement speed is with predetermined movement speed
It is no consistent, if inconsistent, adjust the practical movement speed of target stand；
6), when the practical movement speed of target stand is consistent with predetermined movement speed, measuring unit reads laser displacement sensing
The voltage value of the photodetector acquisition of the shift value and reflective optical fiber displacement sensor of device acquisition；
7), drawing unit is stored after shift value and the accurate clock synchronization of voltage value, and process of fitting treatment generates calibration song
Then calibration curve is output in display by line.
The present invention achieves following technical effect compared with the existing technology：
1, it is stored after shift value and the accurate clock synchronization of voltage value using laser displacement sensor as reference, thus
The measurement point of the corresponding calibration curve generated is more, effectively increases the accuracy of the generated calibration curve of subsequent process of fitting treatment；
2, launching fiber and the arrangement of reception optical fiber coaxial multi-layer, and reference optical fiber is set, increase reflection type optical fiber position
The sensitivity and resolution ratio of displacement sensor, improve its working performance；
3, limit plate is set on target stand, the tested surface of determinand can be limited, avoid going because of the thickness of determinand difference
The position of target stand is adjusted, it is easy to operate.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural schematic diagram of reflective optical fiber displacement sensor situ calibration system of the present invention；
Fig. 2 is the structural schematic diagram of one fibre-optical probe of embodiment；
Fig. 3 is the structural schematic diagram of two fibre-optical probe of embodiment；
Wherein, 1 is workbench, and 2 be laser displacement sensor, and 3 be reflective optical fiber displacement sensor, and 4 be fibre-optical probe,
41 be launching fiber, and 42 be reference optical fiber, and 43 be reception optical fiber, and 5 be target stand, and 51 be mounting base, and 52 be limit plate, and 6 be stepping
Motor, 61 be lead screw.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of reflective optical fiber displacement sensor situ calibration system and methods, on solving
Problem of the existing technology is stated, a situ calibration system and method high-precision, suitable for different conditioned reflexes is established,
And improve the sensitivity and measurement accuracy of reflective optical fiber displacement sensor.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Embodiment one,
The present embodiment provides a kind of reflective optical fiber displacement sensor situ calibration systems, as depicted in figs. 1 and 2, including：
Workbench 1, reflective optical fiber displacement sensor 3, laser displacement sensor 2, target stand 5 and central processing unit；Reflection type optical fiber
Displacement sensor 3, laser displacement sensor 2, target stand 5 are arranged at the top of workbench 1, and connect with central processing unit, lead to
Central processing unit is crossed to measure, record the information of each component, and control each component.
Reflective optical fiber displacement sensor 3 and laser displacement sensor 2 are disposed side by side on workbench 1 by fixed bracket
On, reference is used as using laser displacement sensor 2, by the shift value of laser displacement sensor 2 and reflection type optical fiber displacement sensing
It after the accurate clock synchronization of the voltage value of device 3, is stored, so that the measurement point of the corresponding calibration curve generated is more, after effectively increasing
The accuracy of continuous the generated calibration curve of process of fitting treatment.
Wherein, reflective optical fiber displacement sensor 3 includes the fibre-optical probe 4 being arranged in front of it, setting in fibre-optical probe 4
There are the launching fiber 41, reference optical fiber 42 and reception optical fiber 43 of coaxial setting, reflective optical fiber displacement sensor 3 further includes light source
And photodetector, there are two photodetector settings, and launching fiber 41 is connect with light source, is mapped to determinand for emitting illumination
On, reference optical fiber 42 and reception optical fiber 43 are connect with a photodetector respectively, for receiving illumination；Compared with the prior art
It increases reference optical fiber 42 to connect with photodetector, a reference path is formed, to voltage value measured by photodetector
It compensates, effectively eliminates the influence that light source rises and falls to measurement accuracy.
Reference optical fiber 42 and reception optical fiber 43 be provided with it is multiple, multiple reference optical fibers 42 surround launching fiber 41 outside
Setting, multiple reception optical fibers 43 are arranged around reference optical fiber 42；It is same using launching fiber 41, reference optical fiber 42 and reception optical fiber 43
The mode of axis multilayer arrangement, has good symmetry, the easier coupled into optical fibres probe 4 of the light that light source can be made to issue,
Guarantee to transmit biggish illumination optical power, thus to improve measurement accuracy, while reducing the established angle of fibre-optical probe 4 Yu determinand
Spend the influence to calibration curve；Moreover, the mode of fiber-coaxial multilayer arrangement and the knot of reference path and receiving light path double light path
It closes, increases the sensitivity and resolution ratio of reflective optical fiber displacement sensor 3, improve its working performance.Launching fiber 41 connects
The light source connect is semiconductor laser, wavelength 600-650nm；The driving circuit of light source uses DC driven or pulsed drive,
To improve the stability of light source, the precision of measurement is further improved.
The top of target stand 5 is located at side opposite with fibre-optical probe 4 on workbench 1, target stand 5 for installing determinand
It is slidably connected with workbench 1.The upper center of target stand 5 is provided with mounting base 51, and mounting base 51 includes limit plate 52 and fixing clamp,
Determinand is mounted in mounting base 51, and the tested surface of determinand is vertical with fibre-optical probe 4, is convenient for measuring, and be close to limit plate
52 inside senses tested surface and fibre-optical probe 4 and laser displacement to be defined by limit plate 52 to tested surface
The distance of device 2 is fixed, and prevents from changing tested surface and fibre-optical probe 4 and laser displacement sensor because of the thickness of determinand difference
2 distance causes determinand not within the scope of the useful range of laser displacement sensor 2 and reflective optical fiber displacement sensor 3,
It is easy to operate so as to avoid the position of re-adjustments target stand 5, it is time saving and energy saving.Fixing clamp is located at limit plate 52 and visits far from optical fiber
First 4 side can carry out determinand effectively fixed.
The top of workbench 1 is provided with guide rail, and the bottom of target stand 5 is slidably connected by guide rail with workbench 1；Target stand 5 is remote
Side from fibre-optical probe 4 is provided with stepper motor 6, and stepper motor 6 drives target stand 5 to move by precision lead screw 61, improves target
The mobile accuracy of seat 5 reduces error caused by movement manually.And stepper motor 6 drives target stand 5 by accurate lead screw 61
Movement, is that target stand 5 is driven to move horizontally along guide rail by the rotation of lead screw 61, avoids direct linear pushing target stand 5 and moves
When, because of the inertia bring kinematic error of target stand 5, improve accuracy.
Central processing unit includes pretreatment unit, driving unit, measuring unit, drawing unit and display.Pretreatment is single
The position of member monitoring target stand 5, monitors it whether in the range of laser displacement sensor 2 and reflective optical fiber displacement sensor 3,
Pretreatment unit and driving unit couple, and target stand 5 is adjusted to laser displacement sensor 2 and reflection type optical fiber position by driving unit
Within the scope of the useful range of displacement sensor 3, then pretreatment unit presets predetermined movement speed, the preset movement distance of target stand 5
And predetermined moving direction.Driving unit is connect with 6 signal of stepper motor, and control stepper motor 6 is pressed predetermined movement speed, made a reservation for
Moving distance and predetermined moving direction driving target stand 5 move.Measuring unit and driving unit couple, and measuring unit calculates target stand
5 practical movement speed judges whether practical movement speed is consistent with predetermined movement speed；It is single by driving if inconsistent
The practical movement speed of member adjustment target stand 5；Then measuring unit reads the shift value and reflection that laser displacement sensor 2 acquires
The voltage value of the photodetector acquisition of formula optical fibre displacement sensor 3.Drawing unit and measuring unit couple, and measuring unit is surveyed
It after the accurate clock synchronization of shift value and voltage value obtained, is stored, and process of fitting treatment generates calibration curve；Then calibration curve is defeated
Out into the display being connect with drawing unit signal, conveniently check.
The present embodiment also discloses a kind of based on the reflective of above-mentioned reflective optical fiber displacement sensor situ calibration system
Optical fibre displacement sensor situ calibration method, includes the following steps：
1), determinand is mounted in the mounting base 51 of 5 top of target stand, the tested surface of determinand is limited with limit plate 52,
Fixing clamp fixes determinand, connects system power supply；
2), whether pretreatment unit monitoring target stand 5 is in laser displacement sensor 2 and reflective optical fiber displacement sensor 3
In useful range；If adjusting target stand 5 to laser displacement sensor 2 and reflective optical fiber displacement sensor 3 not in useful range
Useful range within the scope of；
3), when target stand 5 is adjusted within the scope of the useful range of laser displacement sensor 2 and reflective optical fiber displacement sensor 3
When, pretreatment unit presets predetermined movement speed, preset movement distance and the predetermined moving direction of target stand 5；
4), driving unit control stepper motor 6 is driven by predetermined movement speed, preset movement distance and predetermined moving direction
Moving-target seat 5 moves；
5), measuring unit calculates the practical movement speed of target stand 5, judges that practical movement speed is with predetermined movement speed
It is no consistent, if inconsistent, adjust the practical movement speed of target stand 5；
6), when the practical movement speed of target stand 5 is consistent with predetermined movement speed, measuring unit reads laser displacement sensing
The voltage value of the photodetector acquisition for the shift value and reflective optical fiber displacement sensor 3 that device 2 acquires；
7), drawing unit is stored after shift value and the accurate clock synchronization of voltage value, and process of fitting treatment generates calibration song
Then calibration curve is output in display by line.
Embodiment improves the sensitivity of reflective optical fiber displacement sensor and measurement accuracy, and establish one it is high-precision
Situ calibration system and methods spend, suitable for different conditioned reflexes.
Embodiment two,
The present embodiment is the improvement carried out on the basis of example 1, and improvements are only that the structure of fibre-optical probe 4
Difference, as shown in figure 3, being provided with the launching fiber 41 of coaxial setting, reference optical fiber 42 and reception optical fiber in fibre-optical probe 4
43, launching fiber 41 and reception optical fiber 43 are provided with multiple, and multiple launching fibers 41 are arranged around the outside of reference optical fiber 42,
Multiple reception optical fibers 43 are arranged around launching fiber 41.
The present embodiment is had by the way of the arrangement of launching fiber 41, reference optical fiber 42 and 43 coaxial multi-layer of reception optical fiber
Good symmetry, the easier coupled into optical fibres probe 4 of the light that light source can be made to issue, guarantees to transmit biggish illumination light function
Rate, thus to improve measurement accuracy, while reducing influence of the setting angle of fibre-optical probe 4 and determinand to calibration curve；And
And the combination of the mode and reference path and receiving light path double light path of fiber-coaxial multilayer arrangement, increase reflection type optical fiber position
The sensitivity and resolution ratio of displacement sensor 3, improve its working performance.
Specific examples are applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to
According to thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (9)
1. a kind of reflective optical fiber displacement sensor situ calibration system, it is characterised in that：Including：Workbench, reflection type optical fiber
Displacement sensor, laser displacement sensor, target stand and central processing unit；The reflective optical fiber displacement sensor, laser position
Displacement sensor, target stand are arranged at the top of the workbench, and connect with the central processing unit；The reflection type optical fiber position
Displacement sensor and the laser displacement sensor are arranged side by side, and the reflective optical fiber displacement sensor includes being arranged in front of it
Fibre-optical probe, the launching fiber, reference optical fiber and reception optical fiber of coaxial setting are provided in the fibre-optical probe；The target stand
For installing determinand, and it is located at side opposite with the fibre-optical probe on the workbench, the target stand and the work
Platform is slidably connected.
2. reflective optical fiber displacement sensor situ calibration system according to claim 1, it is characterised in that：The reflection
Formula optical fibre displacement sensor further includes light source and photodetector, and the launching fiber is connect with the light source, the reference light
Fine and reception optical fiber is connect with the photodetector.
3. reflective optical fiber displacement sensor situ calibration system according to claim 2, it is characterised in that：The target stand
Upper center be provided with mounting base, the mounting base includes limit plate for limiting the tested surface of determinand and for fixing
The fixing clamp of determinand, the fixing clamp are located at side of the limit plate far from the fibre-optical probe.
4. reflective optical fiber displacement sensor situ calibration system according to claim 3, it is characterised in that：The work
Guide rail is provided with above platform, the bottom of the target stand is slidably connected by the guide rail and the workbench；The target stand is remote
Side from the fibre-optical probe is provided with stepper motor, and the stepper motor drives the target stand to move by lead screw.
5. reflective optical fiber displacement sensor situ calibration system according to claim 4, it is characterised in that：The center
Processor includes pretreatment unit, driving unit, measuring unit, drawing unit and display, the driving unit respectively with institute
Pretreatment unit, measuring unit coupling are stated, the measuring unit is also coupled with the drawing unit, the display and institute
State the connection of drawing unit signal.
6. reflective optical fiber displacement sensor situ calibration system according to claim 2, it is characterised in that：The reference
Optical fiber and reception optical fiber be provided with it is multiple, multiple reference optical fibers around the launching fiber outside be arranged, Duo Gesuo
Reception optical fiber is stated to be arranged around the reference optical fiber.
7. reflective optical fiber displacement sensor situ calibration system according to claim 2, it is characterised in that：The transmitting
Optical fiber and reception optical fiber be provided with it is multiple, multiple launching fibers around the reference optical fiber outside be arranged, Duo Gesuo
Reception optical fiber is stated to be arranged around the launching fiber.
8. reflective optical fiber displacement sensor situ calibration system according to claim 2, it is characterised in that：The light source
For semiconductor laser, wavelength 600-650nm；The driving circuit of the light source uses DC driven or pulsed drive.
9. a kind of reflective optical fiber displacement sensor situ calibration method, it is characterised in that：Include the following steps:
1), determinand is mounted in the mounting base above target stand, the tested surface of determinand is limited with limit plate, fixing clamp is fixed
Determinand connects system power supply；
2), pretreatment unit monitoring target stand whether laser displacement sensor and reflective optical fiber displacement sensor useful range
It is interior；If adjusting the useful range of target stand to laser displacement sensor and reflective optical fiber displacement sensor not in useful range
In range；
3) pre- to locate, when target stand is adjusted within the scope of the useful range of laser displacement sensor and reflective optical fiber displacement sensor
Manage predetermined movement speed, preset movement distance and predetermined moving direction that unit presets target stand；
4), driving unit control stepper motor drives target by predetermined movement speed, preset movement distance and predetermined moving direction
Seat movement；
5), measuring unit calculates the practical movement speed of target stand, judge practical movement speed and predetermined movement speed whether one
It causes, if inconsistent, adjusts the practical movement speed of target stand；
6), when the practical movement speed of target stand is consistent with predetermined movement speed, measuring unit reads laser displacement sensor and adopts
The voltage value of the photodetector acquisition of the shift value and reflective optical fiber displacement sensor of collection；
7), drawing unit is stored after shift value and the accurate clock synchronization of voltage value, and process of fitting treatment generates calibration curve, so
Calibration curve is output in display afterwards.
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| CN201810393361.5A CN108872952A (en) | 2018-04-27 | 2018-04-27 | A kind of reflective optical fiber displacement sensor situ calibration system and method |
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| CN201810393361.5A CN108872952A (en) | 2018-04-27 | 2018-04-27 | A kind of reflective optical fiber displacement sensor situ calibration system and method |
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Application publication date: 20181123 |