CN109827877A - Streaming drop optical measurement instrument and method - Google Patents
Streaming drop optical measurement instrument and method Download PDFInfo
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- CN109827877A CN109827877A CN201910192407.1A CN201910192407A CN109827877A CN 109827877 A CN109827877 A CN 109827877A CN 201910192407 A CN201910192407 A CN 201910192407A CN 109827877 A CN109827877 A CN 109827877A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 36
- 238000005259 measurement Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title description 11
- 239000013307 optical fiber Substances 0.000 claims abstract description 48
- 239000012530 fluid Substances 0.000 claims abstract description 40
- 239000000835 fiber Substances 0.000 claims abstract description 19
- 238000003491 array Methods 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims description 16
- 238000010586 diagram Methods 0.000 claims description 11
- 238000000691 measurement method Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000013481 data capture Methods 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
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Abstract
The present invention relates to streaming drop optical measurement instruments, for being measured to the drop in fluid channel, including setting gradually for generating the laser light source of laser, optical splitter for being divided to the laser from laser light source, the optical fiber of fluid channel is shot through for the laser after propagating and making light splitting positioned at the fluid channel side, the laser of reception optical fiber injection is used for positioned at the fluid channel other side and converts optical signal into the photosurface circuit board of electric signal, one end is connect to acquire the data collecting card of the electric signal from the photosurface circuit board with photosurface circuit board, the data output of data collecting card is connected with computer, fluid channel is equipped with 1 fiber laser arrays points being separated by a certain distance, the number of optical fiber is identical as the number of fiber laser arrays point.The present invention reaches 20Hz since using above-mentioned double coupling photoresist measuring devices and mode, acquisition speed is fast, and the computer hard disc of deposit can guarantee and note down for a long time.
Description
Technical field
The invention belongs to electronic field more particularly to a kind of streaming drop optical measurement instrument and methods.
Background technique
The method of detection fine droplet size has standing photographic analysis (field sweep) and fast camera streaming to take pictures and (sweep a little).
The former is limited to visual field size, and needs drop monolayer distribution, and subsequent statistical analysis is cumbersome；The latter is limited to memory, generally
The case where can only recording ten a few to tens of second, another shutter speed is limited, and oil-water interfaces obscure difficulty and distinguish when flow velocity is high.Patent
CN201410242630 realizes that the solid particulate matter flowed through counts by photoresist equipment, but the device and method cannot obtain us
The size for flowing through object, the information of VELOCITY DISTRIBUTION being concerned about.
Summary of the invention
It is an object of the invention to propose a kind of streaming drop optical measurement instrument and method, quickly double couplings may be implemented
Photoresist measuring device and method.
Implementer's case of the invention is: streaming drop optical measurement instrument, for carrying out to the drop in fluid channel
Measurement, including setting gradually for generating the laser light source of laser, for what is be divided to the laser from laser light source
Optical splitter is used to propagate and make the laser after light splitting to be shot through the optical fiber of fluid channel, be located at institute positioned at the fluid channel side
The fluid channel other side is stated for receiving the laser and the photosurface circuit for converting optical signal into electric signal that the optical fiber projects
Plate, one end are connect to acquire the data collecting card of the electric signal from the photosurface circuit board with the photosurface circuit board,
The data output of the data collecting card is connected with computer, and the fluid channel is equipped at least two be separated by a certain distance
Fiber laser arrays point, the number of the optical fiber are identical as the number of the fiber laser arrays point.
Based on above-mentioned purpose, further improvement of the present invention scheme is: it further include infrared detection card, the infrared ray inspection
It surveys laser of the card for projecting optical fiber to be aligned with fluid channel, so that laser is vertically shot through fluid channel.
Based on above-mentioned purpose, further improvement of the present invention scheme is: the fluid channel be cross section to be round or
Rectangle, characteristic size is in sub-micron or micron-sized long straight pipeline.
Based on above-mentioned purpose, further improvement of the present invention scheme is: the photosurface circuit board includes multiple photosensitive
Face receiving element, NBC connector and power supply, the photosurface receiving element is identical as the number of the optical fiber and is in same optical path
On, each photosurface receiving element is respectively connected to NBC connector, the power supply be connected to the photosurface receiving element being connected in series and
The both ends of NBC connector, the output end of the NBC connector are the electrical signal of photosurface circuit board.
Based on above-mentioned purpose, further improvement of the present invention scheme is: the photosurface circuit board and data collecting card collection
At in same box, structure of fiber_optic being additionally provided on the box and optical fiber is buckled, optic fibre hole is provided on the structure of fiber_optic, it is described
Optical fiber is buckled in optic fibre hole, and structure of fiber_optic is set up on box for by the photosurface receiving element pair in optical fiber and box
It is quasi-.
Based on above-mentioned purpose, another implementer's case of the invention is: streaming drop light measurement method, use are above-mentioned
Streaming drop optical measurement instrument realize, comprising: laser light source generates laser and enters optical fiber after optical splitter is divided, in optical fiber
After laser projects, the fluid channel flowed through across drop enters photosurface circuit board, the laser that photosurface circuit board will receive
Optical signal be converted into electric signal, data collecting card acquires the electric signal of photosurface circuit board, and electric signal is changed over time
Signal file save and analyzed into computer, every optical-fibre channel can save an electric signal file and realize streaming drop light
Measurement.
Based on above-mentioned purpose, further improvement of the present invention scheme is: occupation rate α, η of drop and oily phase is respectively as follows: When T is detection
Between, TGiIt is the time for detecting drop, TLiIt is the time for detecting oily phase.
Based on above-mentioned purpose, further improvement of the present invention scheme is: the streaming drop light measurement includes to drop wink
The measurement of Shi Sudu: V=S/T ', S are the interval between two optical fiber that direction of fluid is arranged, and T ' is drop process
The time difference of two optical fiber.
Based on above-mentioned purpose, further improvement of the present invention scheme is: the streaming drop light measurement includes long to drop
The calculating of degree: the critical value of difference drop and foreign minister is set up, obtains the waveform diagram of each drop, waveform diagram medium wave peak is accounted in x-axis
According to time be time t of the drop by fiber-optic monitoring pointdrop, the length of drop is equal to instantaneous velocity and tdropProduct.
Beneficial effect
The present invention is since using above-mentioned double coupling photoresist measuring devices and mode, acquisition speed is fast, reaches 20Hz, deposits
The computer hard disc entered can guarantee and note down for a long time.
The automatic counting statistics of self-editing algorithm energy, ensure that quick, accurate, the high-throughput feature of detection.
Detailed description of the invention
Fig. 1 is one light detection integrated equipment appearance of the embodiment of the present invention；
Fig. 2 is that the embodiment of the present invention one is directed at support schematic diagram；
Fig. 3 is one optical fiber button schematic diagram of the embodiment of the present invention；
Fig. 4 is the circuit diagram of one photosurface circuit board of the embodiment of the present invention；
Fig. 5 is one streaming drop optical measurement instrument schematic diagram of the embodiment of the present invention；
Fig. 6 is two light measurement method operational flowchart of the embodiment of the present invention；
Fig. 7 (a) is the spatial arrangement figure of two fiber laser arrays of the embodiment of the present invention；
Fig. 7 (b) is two flow pattern of the embodiment of the present invention and electric signal shape graph；
Fig. 8 is two pulse electrical signal drop of the embodiment of the present invention and foreign minister's schematic diagram；
Fig. 9 is two optical fiber cloth micro-channel tubes schematic diagram of the embodiment of the present invention.
Specific embodiment
It is below in conjunction with attached drawing and specifically real in order to be more clear principle and the advantage of the purpose of the present invention, technical solution
Scheme is applied, the present invention will be described in further detail.In the present embodiment, described specific embodiment is only used to
It explains the present invention, is not intended to limit the present invention.
Embodiment one
As shown in Figure 1 and shown in Fig. 5, streaming drop optical measurement instrument, for being surveyed to the drop in fluid channel 7
Amount, the laser light source 1 for generating laser including setting gradually, point for being divided to the laser from laser light source
Light device 2 is used to propagate and make the laser after light splitting to be shot through the optical fiber 3 of fluid channel 7, is located at positioned at 7 side of fluid channel
7 other side of fluid channel is used to receive the laser that the optical fiber 3 projects and the photosurface for converting optical signal into electric signal
Circuit board 4, one end are connect to acquire the data of the electric signal from the photosurface circuit board 4 with the photosurface circuit board 4
The data output of capture card 5, the data collecting card 5 is connected with computer 6, and the fluid channel 7 is equipped at least at a distance of one
Two fiber laser arrays points of set a distance, the number of the optical fiber 3 are identical as the number of the fiber laser arrays point.Photosurface circuit board
Optical signal is converted to electric signal by 4, imports data collecting card 5, and be stored in the computer 6 being connected with data output.The stream
Formula drop optical measurement instrument further includes infrared detection card, and the infrared detection card is used for the laser and stream for projecting optical fiber 3
Body channel 7 is aligned, so that laser is vertically shot through fluid channel 7.The fluid channel is that cross section is round or rectangle, feature
Size is in sub-micron or micron-sized long straight pipeline.The photosurface circuit board and data collecting card are integrated in same box,
It is additionally provided with structure of fiber_optic on the box and optical fiber is buckled, as shown in Figures 2 and 3, optic fibre hole is provided on the structure of fiber_optic, it is described
Optical fiber is buckled in optic fibre hole, and structure of fiber_optic is set up on box for optical fiber and the photosurface receiving element 8 in box is right
It is quasi-.As shown in figure 4, the photosurface circuit board includes multiple photosurface receiving elements 8, NBC connector 9 and power supply, the light
Quick face receiving element 8 is identical as the number of the optical fiber and in same optical path, and each photosurface receiving element 8 is distinguished
Being connected to NBC connector 9, (Bayonet Nut Connector, bayonet nut connector are a kind of connections for coaxial cable
Device), the power supply is connected to the both ends of the photosurface receiving element 8 and NBC connector 9 that are connected in series, the output end of the NBC connector 9
For the electrical signal of photosurface circuit board.
Light sensing device is integrated into a portability unit for the first time by the overall appearance of our invention products such as Fig. 1.We
The photosurface circuit board that will test change in optical signal and the data collecting card for saving the electric signal after conversion are integrated in a box
In, it is self-powered.Separately it is furnished with upstream laser light source and optical splitter, Fig. 2, optical fiber button is shown in by line cutting technology plus a structure of fiber_optic
On have two pairs of fibre detection mouth, which can detect the information that drop flows through in two fluid channels simultaneously.Optical fiber branch
It when frame is clipped on black box, is aligned just with the light sensor in box, operation is portable simple, is easy to extend to Other Engineering applied field
It closes.
Embodiment two
As shown in Figure 5 and Figure 6, streaming drop light measurement method, laser light source generate laser and enter after optical splitter is divided
Optical fiber, as shown in Fig. 7 (a) and Fig. 9, after the laser in optical fiber projects, the fluid channel flowed through across drop enters photosurface electricity
Road plate, arranges 1 fiber laser arrays points on fluid channel, and photosurface circuit board turns the optical signal of the laser received
Electric signal is turned to, data collecting card acquires the electric signal of photosurface circuit board, and the signal file that electric signal is changed over time
Preservation is analyzed into computer, and every optical-fibre channel can save an electric signal file and realize streaming drop light measurement.
The measurement procedure of invention device is as shown in Figure 6: the near infrared light that semiconductor laser light resource generates passes through optical splitter, point
For four tunnels, each interior transmission of leisure optical fiber.Unlike CN201410242630, we are arranged in close proximity two on fluid channel
Fiber laser arrays point, as shown in Fig. 7 (a).Laser from optical fiber project, by infrared detection card (VRC2, https: //
Www.thorlabs.com/newgrouppage9.cfm? objectgroup_id=296, VRC2 are a credit card-sizeds
Detecting card, for observing wave-length coverage in the light of 400-640nm or 800-1700nm.This durable plastic clip table before it is lower
Face is light sensation region, very convenient positioning visible light or near-infrared (NIR) light beam and its focus.Using needing before observation card with can
Light-exposed charging.Light could be emitted since card needs to charge, user must constantly move the position of launching spot in photosensitive area,
The intensity of stimulated light emission is maintained with this.In order to be more convenient to use in the aligning process, the detecting area for observing card is extended to
Edge, and quarter, there are two the cross hairs for being used for laser alignment.Cross hairs thickness is about 0.004 inch, intermediate two concentric circles
Diameter be about 0.063 inch and 0.288 inch, horizontal and vertical wire length is each about 0.512 inch.) lead to it with fluid
Road alignment.The laser that perpendicular projection is crossed is received by the photosurface element of the photosurface circuit board of the fluid channel other side, and by light
Signal is converted to electric signal.Electric signal is directly recorded in computer hard disc by data output by data collecting card, every light
Fine channel can save an electric signal file.Common computer is able to satisfy up to a hundred hours continuous records.
By self-compiling program under Visual BASIC environment, light can be flowed successively through in this period from calculating in electric signal
The size of fine all drops.We calculate thinking at exclusive program are as follows: drop flows through detection mouth and has specific waveform, sees figure
7 (b), select critical value to distinguish two-phase.One drop flows through the time difference of two coupling fiber positions it is found that in conjunction with two light
Fine distance s, can calculate the instantaneous velocity of drop；The time and channel that the size of drop is undergone by instantaneous velocity, waveform tie
Structure is calculated and is obtained.
1, the measurement of droplet content:
Transmitance is big when light passes through water drop, and voltage value is larger after being responded by photodiode；In oily phase foreign minister, light is saturating
It is small to cross rate, voltage value is smaller after being responded by photodiode；Make threshold value with the average value of voltage max and minimum value, to distinguish
Two-phase, such as Fig. 8.
The voltage signal obtained using fiber-optic probe calculates separately out the occupation rate (α, η) of drop and oily phase:
Wherein, T is detection time, TGiIt is the detection time for detecting drop, TLiIt is the time of oily mutually detection.
2, the measurement of each liquid drop speed:
As shown in figure 9, (arranging two fibre optical sensors along the direction of fluid channel tube, being divided into s cm, s in model machine
=1cm)
One drop has distinctive waveform, and the time difference by two optical fiber is T ', then instantaneous velocity V=S/T '.S is suitable
Direction of fluid arrangement two optical fiber between interval, T ' be drop pass through two optical fiber time difference.
3, the calculating of blob length:
As shown in figure 8, when the critical value for setting up difference drop and foreign minister, so that it may the waveform diagram of each drop is obtained, this
A wave crest is exactly time t of this drop by fiber-optic monitoring point in the time that x-axis occupiesdrop.The length of drop is equal to instantaneous
Speed and tdropProduct.
Because voltage when drop is by fiber-optic probe is low-voltage, lasting by drop average speed and low level
Time (namely drop is by the time at fiber-optic probe) is multiplied, and has just obtained the length of drop.
Use above specific case is illustrated the present invention, is merely used to help understand the present invention, not to limit
The system present invention.For those skilled in the art, according to the thought of the present invention, can also make several simple
It deduces, deform or replaces.
Claims (9)
1. streaming drop optical measurement instrument, for being measured to the drop in fluid channel, it is characterised in that: including successively setting
Set for generate the laser light source of laser, the optical splitter for being divided to the laser from laser light source, be located at it is described
Fluid channel side is used to propagate and make the laser after light splitting to be shot through the optical fiber of fluid channel, be located at the fluid channel other side
For receive laser that the optical fiber projects and convert optical signal into the photosurface circuit board of electric signal, one end with it is described photosensitive
Face circuit board is connected to acquire the data collecting card of the electric signal from the photosurface circuit board, the number of the data collecting card
It is connected according to delivery outlet with computer, the fluid channel is equipped with 1 fiber laser arrays points being separated by a certain distance, the light
Fine number is identical as the number of the fiber laser arrays point.
2. streaming drop optical measurement instrument according to claim 1, it is characterised in that: further include infrared detection card, institute
Infrared detection card is stated for the laser that optical fiber projects to be aligned with fluid channel, so that laser is vertically shot through fluid channel.
3. streaming drop optical measurement instrument according to claim 2, it is characterised in that: the fluid channel is cross section
For round or rectangle, characteristic size is in sub-micron or micron-sized long straight pipeline.
4. streaming drop optical measurement instrument according to claim 3, it is characterised in that: the photosurface circuit board includes
Multiple photosurface receiving elements, NBC connector and power supply, the photosurface receiving element is identical as the number of the optical fiber and is in
In same optical path, each photosurface receiving element is respectively connected to NBC connector, and the power supply is connected to the photosurface being connected in series and connects
The both ends of element and NBC connector are received, the output end of the NBC connector is the electrical signal of photosurface circuit board.
5. streaming drop optical measurement instrument according to claim 4, it is characterised in that: the photosurface circuit board and data
Capture card is integrated in same box, and structure of fiber_optic is additionally provided on the box and optical fiber is buckled, is provided with light on the structure of fiber_optic
Fine hole, the optical fiber are buckled in optic fibre hole, and structure of fiber_optic is set up on box for connecing optical fiber and the photosurface in box
Receive element alignment.
6. streaming drop light measurement method, it is characterised in that: using streaming drop flash ranging described in claim 1-5 any one
It measures device to realize, comprising: laser light source generates laser and enters optical fiber after optical splitter is divided, and after the laser in optical fiber projects, wears
It crosses the fluid channel that drop flows through and enters photosurface circuit board, photosurface circuit board converts the optical signal of the laser received to
Electric signal, data collecting card acquires the electric signal of photosurface circuit board, and the electric signal file that electric signal is changed over time is protected
It deposits into computer, every optical-fibre channel saves an electric signal file, realizes streaming liquid by carrying out analysis to electric signal file
Drip light measurement.
7. streaming drop light measurement method according to claim 6, it is characterised in that: occupation rate α, η of drop and oily phase
It is respectively as follows: T is
Detection time, TGiIt is the time for detecting drop, TLiIt is the time for detecting oily phase.
8. streaming drop light measurement method according to claim 7, it is characterised in that: the streaming drop light measurement includes
Measurement to drop instantaneous velocity: V=S/T ', S are the interval between two optical fiber that direction of fluid is arranged, and T ' is
Drop passes through the time difference of two optical fiber.
9. streaming drop light measurement method according to claim 8, it is characterised in that: the streaming drop light measurement includes
Calculating to blob length: the critical value of difference drop and foreign minister is set up, the waveform diagram of each drop, waveform diagram medium wave peak are obtained
It is time t of the drop by fiber-optic monitoring point in the time that x-axis occupiesdrop, the length of drop is equal to instantaneous velocity and tdropMultiply
Product.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910192407.1A CN109827877A (en) | 2019-03-14 | 2019-03-14 | Streaming drop optical measurement instrument and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910192407.1A CN109827877A (en) | 2019-03-14 | 2019-03-14 | Streaming drop optical measurement instrument and method |
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| CN109827877A true CN109827877A (en) | 2019-05-31 |
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ID=66869232
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| US20060158477A1 (en) * | 2005-01-14 | 2006-07-20 | Fuji Photo Film Co., Ltd. | Liquid ejection apparatus, image forming apparatus and ejection determination method |
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| CN104237109A (en) * | 2014-07-02 | 2014-12-24 | 南京航空航天大学 | Method and device for measuring deformation and breakage process characteristics of single liquid drop in airflow |
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2019
- 2019-03-14 CN CN201910192407.1A patent/CN109827877A/en active Pending
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| US20060158477A1 (en) * | 2005-01-14 | 2006-07-20 | Fuji Photo Film Co., Ltd. | Liquid ejection apparatus, image forming apparatus and ejection determination method |
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