CN206990471U - Detect the dual-wavelength coaxial fibre optical sensor of steel ball surface defect - Google Patents
Detect the dual-wavelength coaxial fibre optical sensor of steel ball surface defect Download PDFInfo
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- CN206990471U CN206990471U CN201720594038.5U CN201720594038U CN206990471U CN 206990471 U CN206990471 U CN 206990471U CN 201720594038 U CN201720594038 U CN 201720594038U CN 206990471 U CN206990471 U CN 206990471U
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Abstract
The utility model discloses a kind of dual-wavelength coaxial fibre optical sensor for detecting steel ball surface defect, include the semiconductor light source of two kinds of wavelength, the light of the semiconductor light source of two kinds of wavelength is coupled at the launching fiber of optical probe beam by fiber coupler to be sent, illumination is reflected after being mapped to steel ball surface, and the light reflected is received by two coaxial reception optical fiber beams；After the optical signal of two reception optical fiber beams carries out wavelength separated again after fiber coupler couples, opto-electronic conversion is carried out by photodetector, ratio computing is carried out to the luminous power opto-electronic conversion value received under different reception optical fiber beams, different wave length again, the defects of drawing displacement, the roughness parameter information of steel ball surface, and then judging steel ball surface situation.
Description
Technical field
It the utility model is related to a kind of dual-wavelength coaxial fibre optical sensor for detecting steel ball surface defect.
Background technology
Bearing is extremely extensive as very important basic part application in plant equipment, in military project, national defence, highly sophisticated device
Instrument etc. requires the high field of reliability, it is desirable to which product will accomplish that " zero-fault " exists《Made in China 2025》In " strong basis engineering " will
High-speed high-precision bearing is classified as the project of giving priority to.Major part of the steel ball as bearing, life-span of its quality to bearing, property
Energy and precision etc. have conclusive influence.Experiment statisticses show that bearing failure rate is 58.8% as caused by steel ball surface defect
More than, it is known that the surface quality of steel ball is one of key factor for influenceing bearing performance.Steel ball surface defect is by defect form
Difference can be divided into several classes such as pit, spot, scratch, stroke bar, pit.
The method for being presently used for steel ball surface defect detection mainly has photoelectric detection method, machine vision method, eddy current detection
Method, ultrasonic testing etc..Every kind of single method has the advantages of its is specific but there is also certain weak point, used
Every kind of sensor can only detect a defect parameters of steel ball surface, less efficient.Complete detection to steel ball surface generally needs
Want multiple sensor combinations to complete jointly, so only will introduce multiple errors with regard to Sensor section, cause the overall inspection of steel ball
Surveying precision reduces, and the process such as installation and debugging of multiple sensors is cumbersome, adds heavily to the difficulty of the work, once there is a sensor hair
Raw failure, may result in missing inspection or flase drop.External advanced Steel Ball Surface Defect Detecting Instrument, it is expensive, and many elements
All it is consumable accessory, it is necessary to accuracy of detection could be kept by regularly replacing, causes follow-up maintenance costly.China produces as steel ball
Big country, the annual production of plain ball factory is up to 10,000,000,000, if carrying out steel ball surface defect by the detection device for purchasing expensive foreign
Detection, general steel ball producer is difficult to the cost of equipment for undertaking great number.Steel ball surface defect detection is the whole technological process of production
Last one of quality testing outpost of the tax office, be that finished product steel ball dispatches from the factory the decisive process of precision.
China has turned into the country of steel ball yield in the world and export volume maximum now, but high-end steel ball is but limited by day
Lack the steel ball surface defect detection device of high-efficiency high-precision in the production of the countries such as sheet, Czech, mainly steel ball.Steel ball surface
The test problems of defect have become the bottleneck for pining down enterprise development.
Utility model content
The utility model is in order to solve the above problems, it is proposed that a kind of dual-wavelength coaxial optical fiber for detecting steel ball surface defect
A few class defect parameters of steel ball are turned to surface defect height, surface defect depth and surface defect by sensor, the utility model
Reflectivity, wherein surface defect height and the change that surface defect depth is displacement, surface defect reflectivity are the change of roughness
Change；Meanwhile the advantages of fibre optical sensor profile is tiny, loss is low, precision is high, non-contact detecting etc. is unique is given full play to, and
The characteristics of detection of many kinds of parameters such as displacement, pressure, temperature, roughness can be carried out.Optical fiber sensing technology is preferably applied to
In steel ball surface defect detection, the Steel Ball Surface Defect Detecting Instrument for exploitation high accuracy, high efficiency, moderate cost lays the foundation.
To achieve these goals, the utility model adopts the following technical scheme that：
A kind of dual-wavelength coaxial fibre optical sensor for detecting steel ball surface defect, include the semiconductor light source of two kinds of wavelength,
The light of the semiconductor light source of two kinds of wavelength is coupled at the launching fiber of optical probe beam by fiber coupler to be sent, illumination
Reflected after being mapped to steel ball surface, the light reflected is received by two coaxial reception optical fiber beams；
After the optical signal of described two reception optical fiber beams carries out wavelength separated again after fiber coupler couples, pass through light
Electric explorer carries out opto-electronic conversion, then the luminous power opto-electronic conversion value to being received under different reception optical fiber beams, different wave length is carried out
Ratio computing, the defects of drawing displacement, the roughness parameter information of steel ball surface, and then judging steel ball surface situation.
The luminous power photoelectricity to being received under different reception optical fiber beams, different wave length can be carried out with selection control or server
Conversion value carries out ratio computing, draws displacement, the roughness parameter information of steel ball surface, and then judges lacking for steel ball surface
The situation of falling into.
Further, the fibre optical sensor is dual-wavelength coaxial fibre optical sensor.
Further, the semiconductor light source, respectively using the light of two kinds of wavelength of 1310nm and 1550nm.
Further, there is the coaxial-type knot of two circle reception optical fibers around a launching fiber centered on optical probe beam
Structure, it is respectively the six roots of sensation and 12 that surrounding two, which encloses reception optical fiber, and all close fiber optics are arranged in hexagon.
Fiber coupler in light source Yu launching fiber junction is two-in-one fiber coupler.
It is the fiber coupler of the six directions one in the fiber coupler of reception optical fiber output end, the first lap of optical probe beam
One fiber coupler of the six directions one of the light that six roots of sensation reception optical fiber receives is coupled in an optical fiber as an entirety, and second
12 root receiving fibers are enclosed with two fiber couplers of the six directions one.
The wavelength division multiplexer is one-to-two wavelength division multiplexer, and the light received is divided into 1310nm and 1550nm two-way.
Two fiber couplers of the six directions one of the second circle reception optical fiber connection, export two-way 1310nm after wavelength division multiplexer
With two-way 1550nm light, then four road analog voltages are converted into respectively by photodetector, the two-way light of phase co-wavelength is turned
The magnitude of voltage changed into is added, as an entirety.
A kind of method for detecting steel ball surface defect, two semiconductor light sources send the light of two kinds of wavelength, pass through optical fiber coupling
Clutch is coupled in a launching fiber, is sent by sensor probe center, and illumination is reflected after being mapped to steel ball surface, reflection
The light returned receives by coaxial first lap and the second circle reception optical fiber beam, receives the size and steel ball surface of reflective light intensity
Defect situation is relevant, first lap reception optical fiber and second circle reception optical fiber optical signal carry out coupling and wavelength separated after each
Road light carries out opto-electronic conversion；Ratio computing is carried out to the luminous power opto-electronic conversion value received under different circles, different wave length again, drawn
The displacement of steel ball surface, roughness parameter information, and then situation the defects of judge steel ball surface.
Steel ball surface defect is characterized by detecting displacement and roughness.
Compared with prior art, the beneficial effects of the utility model are：
The characteristics of the utility model can carry out many reference amounts detection using optical fiber sensing technology, the dual-wavelength coaxial optical fiber of design
Sensor can measure displacement and the roughness parameter of steel ball surface defect simultaneously, and list can only be detected by changing the previous sensor of mesh
The limitation of one parameter, simplify the cumbersome procedure for needing multiple sensors to take multiple measurements a piano plate in the past, drop
Low missing inspection, false drop rate and measurement error, double-wavelength method is used to survey roughness, coaxial reference beam method displacement, two parameter lists
Solely detection be independent of each other, ratio method is used to displacement and the detection of roughness, can eliminate light source fluctuation, surface reflectivity,
The influence of the interference such as signal to noise ratio, increase the accuracy of detection.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.
Fig. 1 is overall structure diagram of the present utility model；
Fig. 2 is dual-wavelength coaxial fiber-optic sensor probe end face structure figure of the present utility model.
Wherein, 1.1310nm semiconductor light sources, 2.1550nm semiconductor light sources, 3. two-in-one fiber couplers, 4. transmittings
Optical fiber, 5. sensor probes, 6. first lap reception optical fibers (6), 7. second circle reception optical fibers (12), the optical fiber coupling of 8. six directions one
Clutch, 9. wavelength division multiplexers, 10. photodetectors, 11. steel balls.
Embodiment：
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
Completed jointly because the complete detection existed in the prior art to steel ball surface usually requires multiple sensor combinations,
Multiple errors only so will be introduced with regard to Sensor section, cause the whole detection precision of steel ball to reduce, and multiple sensors
The process such as installation and debugging it is cumbersome, add heavily to the difficulty of the work, once there is a sensor failure, may result in missing inspection or flase drop
Deficiency.
In order to solve the above problems, the utility model provides a kind of dual-wavelength coaxial light for steel ball surface defect detection
Fiber sensor, the advantages of fibre optical sensor profile is tiny, loss is low, precision is high, non-contact detecting etc. is unique is given full play to, and
The characteristics of detection of many kinds of parameters such as displacement, pressure, temperature, roughness can be carried out.Optical fiber sensing technology is preferably applied to
In steel ball surface defect detection, the Steel Ball Surface Defect Detecting Instrument for exploitation high accuracy, high efficiency, moderate cost lays the foundation.
As shown in Figure 1 and Figure 2, a kind of dual-wavelength coaxial fibre optical sensor for steel ball surface defect detection includes partly leading
Body light source 1,2, two-in-one fiber coupler 3, launching fiber 4, sensor probe 5, first lap reception optical fiber 6, the second circle receive
Optical fiber 7, the fiber coupler 8 of the six directions one, wavelength division multiplexer 9, photodetector 10, steel ball 11.
Semiconductor light source 1 is the light source that wavelength of transmitted light is 1310nm, and semiconductor light source 2 is that wavelength of transmitted light is 1550nm
Light source.
Two kinds of wavelength that two-in-one fiber coupler 3 sends semiconductor light source 1,2 optically coupling to a launching fiber
In.
Launching fiber 4, first lap reception optical fiber 6, second enclose the multimode fibre that the size of reception optical fiber 7 is 105/125um,
Numerical aperture NA=0.22.
Launching fiber 4, reception optical fiber 6,7 are integrated a branch of coaxial optical fiber by sensor probe 5, and one, center is launching fiber
4, the circle of surrounding two is reception optical fiber 6,7, and its end face structure arrangement mode is as shown in Figure 2.
The fiber coupler 8 of the six directions one encloses in reception optical fiber 7 first lap reception optical fiber 6, second per 6 optical fiber separately
Receive optically coupling in an optical fiber.
9 reflected lights received of wavelength division multiplexer are divided into two-way, two kinds of wavelength of respectively 1310nm and 1550nm.
Optical signal is converted into electric signal, the light for the 1310nm wavelength that first lap reception optical fiber 6 exports by photodetector 10
The electric signal being converted into is P11, the electric signal that the light for the 1550nm wavelength that first lap reception optical fiber 6 exports is converted into is P12, the
The 1310nm wavelength that 6 piece optical fiber of the two circle reception optical fibers 7 with optical fiber A separately export after the fiber coupler 8 of the six directions one couples
The electric signal that is converted into of light be P21A, the second circle reception optical fiber 7 is with 6 optical fiber of optical fiber A separately through the fiber coupling of the six directions one
The electric signal that the light for the 1550nm wavelength that device 8 exports after coupling is converted into is P22A, the second circle reception optical fiber 7 and optical fiber B are separately
The electric signal that is converted into of the light of 1310nm wavelength that is exported after the coupling of the fiber coupler 8 of the six directions one of 6 optical fiber be P21B, the
The 1550nm wavelength that 6 piece optical fiber of the two circle reception optical fibers 7 with optical fiber B separately export after the fiber coupler 8 of the six directions one couples
The electric signal that is converted into of light be P22B, as shown in Figure 1.
Steel ball 11 is diameter 4mm~10mm finished product steel ball.
The course of work is as follows：
Two semiconductor light sources 1,2 send the light of two kinds of wavelength, are coupled to a transmitting by two-in-one fiber coupler 3
In optical fiber, sent by launching fiber 4 from the center of sensor probe 5 and be irradiated to steel ball surface, the light reflected is by coaxially connecing
Receive fibre bundle 6,7 to receive, it is coupled with 3 fiber couplers 8 of the six directions one, 3 exported after coupling simple optical fiber believes light
Number it is respectively transmitted to carry out wavelength separated in 3 wavelength division multiplexers 9, each wavelength division multiplexer 9 isolates 1310mn and 1550nm
The light of two kinds of wavelength, then opto-electronic conversion is carried out photodetector 10 is sent into per light all the way, then the electric signal of output is carried out
Analysis plus and computing, ratio computing etc., draw displacement, the roughness situation of change of steel ball surface defect, complete detection.
Obtaining the luminous power that reception optical fiber received according to the measuring principle of optical intensity modulation type fibre optical sensor is：
P=I0·ρ·δ·γ·S·f(d) (1)
In formula, I0For incident intensity, ρ is to be lost caused by optical fiber transmission, and δ is light source drift coefficient of variation, and γ is surface
Reflectivity factor, S are the area that reception optical fiber receives light, and f (d) is fiber core radius r1And r2, the optical fiber such as numerical aperture NA ginseng
The compound function of the sensor construction parameters such as number, distance d, the fibre core spacing a of sensor probe to steel ball surface, works as optical fiber parameter
When determining, f (d) is the function only with respect to detecting distance d, when the optical signal received using two circle reception optical fibers is carried out at ratio
During reason, the influence of the disturbing factors such as fiber transmission attenuation, light source drift fluctuation, surface reflectivity can be eliminated, the ratio is only
With sensor probe end face to the relevant functions of the distance d of tested steel ball surface, therefore can accurately obtain by this method
The change in displacement situation of steel ball surface, so as to judge the displacement defect of steel ball surface, displacement calculation formula is：
Formula (2) and formula (3) are the displacement calculation formula for two kinds of wavelength lights of 1310nm and 1550nm respectively, can also be led to
Cross and the difference of gained displacement under both wavelength is further analyzed, remove error, improve measurement accuracy.
The luminous power that reception optical fiber is received is represented by again：
In formula, I0For incident intensity, λ is lambda1-wavelength, and σ is detected element surface profile root-mean-square-deviation, and β (λ) is
Non-systematic error, S are the area that reception optical fiber receives light, can reflect surface roughness situation by the relation of σ and roughness,
Same sensor fiber transmission path, transmission loss etc. are identical, it is believed that use non-system caused by the light detection of two kinds of wavelength
Unite error β (λ1) and β (λ2) identical, the influence of non-systematic error can be eliminated when being handled using dual wavelength ratio method, is carried
High measurement accuracy, therefore the roughness situation of change of steel ball surface can be accurately obtained by this method, so as to judge steel
The roughness of ball surface, calculation formula are：
Formula (5) and formula (6) are the optical information that first lap reception optical fiber and the second circle reception optical fiber receive and σ pass respectively
System, formula (7) is the relation of surface profile arithmetic mean deviation i.e. roughness Ra and surface profile root-mean-square-deviation σ, passes through the above
Formula can calculate surface roughness value, and the variance analysis of roughness obtained by the optical oomputing received to inside and outside two circles contrasts, can
Further improve measurement accuracy.
The preferred embodiment of the application is the foregoing is only, is not limited to the application, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
It is not new to this practicality although above-mentioned specific embodiment of the present utility model is described with reference to accompanying drawing
The limitation of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Field technique personnel need not pay the various modifications that creative work can make or deformation still in protection model of the present utility model
Within enclosing.
Claims (8)
1. a kind of dual-wavelength coaxial fibre optical sensor for detecting steel ball surface defect, it is characterized in that：Partly leading including two kinds of wavelength
Body light source, the light of the semiconductor light source of two kinds of wavelength is coupled at the launching fiber of optical probe beam by fiber coupler to be sent out
Go out, illumination is reflected after being mapped to steel ball surface, and the light reflected is received by two coaxial reception optical fiber beams；
After the optical signal of described two reception optical fiber beams carries out wavelength separated again after fiber coupler couples, visited by photoelectricity
Survey device and carry out opto-electronic conversion.
2. a kind of dual-wavelength coaxial fibre optical sensor for detecting steel ball surface defect as claimed in claim 1, it is characterized in that：Institute
It is dual-wavelength coaxial formula structure to state fibre optical sensor.
3. a kind of dual-wavelength coaxial fibre optical sensor for detecting steel ball surface defect as claimed in claim 1, it is characterized in that：Institute
Semiconductor light source is stated, respectively using the light of two kinds of wavelength of 1310nm and 1550nm.
4. a kind of dual-wavelength coaxial fibre optical sensor for detecting steel ball surface defect as claimed in claim 1, it is characterized in that：Light
There is the coaxial structure of two circle reception optical fibers around a launching fiber, surrounding two encloses reception optical fiber point centered on fine beam probe
Not Wei the six roots of sensation and 12, all close fiber optics are arranged in hexagon.
5. a kind of dual-wavelength coaxial fibre optical sensor for detecting steel ball surface defect as claimed in claim 1, it is characterized in that：
Light source and the fiber coupler of launching fiber junction are two-in-one fiber coupler.
6. a kind of dual-wavelength coaxial fibre optical sensor for detecting steel ball surface defect as claimed in claim 1, it is characterized in that：
The fiber coupler of reception optical fiber output end is the fiber coupler of the six directions one, and the six roots of sensation of the first lap of optical probe beam is received light
One fiber coupler of the six directions one of the light that fibre receives, which is coupled in an optical fiber, is used as an entirety, the second 12 piece-root graftings of circle
Receive two fiber couplers of the six directions one of optical fiber.
7. a kind of dual-wavelength coaxial fibre optical sensor for detecting steel ball surface defect as claimed in claim 6, it is characterized in that：The
Two fiber couplers of the six directions one of two circle reception optical fiber connections, export two-way 1310nm and two-way after wavelength division multiplexer
1550nm light, then it is converted into four road analog voltages respectively by photodetector, the two-way light of phase co-wavelength is converted into
Magnitude of voltage is added, as an entirety.
8. a kind of dual-wavelength coaxial fibre optical sensor for detecting steel ball surface defect as claimed in claim 7, it is characterized in that：Institute
It is one-to-two wavelength division multiplexer to state wavelength division multiplexer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014828A (en) * | 2017-05-25 | 2017-08-04 | 济南大学 | Detect the dual-wavelength coaxial fibre optical sensor and method of steel ball surface defect |
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- 2017-05-25 CN CN201720594038.5U patent/CN206990471U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014828A (en) * | 2017-05-25 | 2017-08-04 | 济南大学 | Detect the dual-wavelength coaxial fibre optical sensor and method of steel ball surface defect |
| CN107014828B (en) * | 2017-05-25 | 2023-10-13 | 济南大学 | Dual-wavelength coaxial optical fiber sensor and method for detecting surface defects of steel balls |
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