CN104949904B - A kind of apparatus and method for detecting fluid magnetic-particle - Google Patents
A kind of apparatus and method for detecting fluid magnetic-particle Download PDFInfo
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- CN104949904B CN104949904B CN201510379282.5A CN201510379282A CN104949904B CN 104949904 B CN104949904 B CN 104949904B CN 201510379282 A CN201510379282 A CN 201510379282A CN 104949904 B CN104949904 B CN 104949904B
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Abstract
The present invention relates to the apparatus and method of detection fluid magnetic-particle, its device includes image-forming module, adsorption module, control module, light transmission piece and image processing module；Image-forming module, adsorption module and light transmission piece are arranged on the same side of runner；Adsorption module is electrically connected with control module；Light transmission piece is fixed on runner upper surface, positioned at image-forming module light path center, and light transmission piece is located in magnetic field produced by after adsorption module is powered, and adsorption module is by below granular absorption to light transmission piece；Image processing module is electrically connected with image-forming module, control module respectively, and control module is uploaded to after the particle image signal transacting exported to image-forming module；Control module carries out image analysis processing to picture signal, draws the physical characteristic data of particle.Influence this invention removes bubble in fluid to magnetic particle imaging, realizes the detection to magnetic particles in fluid, can be detected quantity, shape, texture and the size of magnetic particles in fluid.
Description
Technical field
The present invention relates to Condition Detection and analysis field, more particularly to based on magnetic particles in fluid imaging, to obtain
Obtain the apparatus and method of the detection fluid magnetic-particle of magnetic-particle physics characteristic.
Background technology
The technical principle of detection fluid magnetic-particle is that the magnetic in magnetic force, fluid-absorbent is produced using inductance excitation mode
Particle, carries out particle imaging, the physical characteristic such as size, concentration, shape, color, texture to detect particle.
In some existing magnetic-particle detection means, such as Publication No. CN103983543A Chinese invention patent
Application, its camera lens and adsorption element are separately positioned on the both sides of liquid flow channel for oil, only 1.8 times of focusing range, and this, which is resulted in, is obtaining
During fluid particle, due to the refraction or reflection of light, the bubble in fluid changes single uniform Jie in script light transmittance process
Matter, the imaging of influencing magnetic particles；In addition, when detecting opaque fluid, opaque fluid can produce obstruction to imaging in itself
Effect.
The refraction of light and the reflection of light are all to occur the intersection in two media, and simply reflected light is returned in former medium,
And reflect light and then enter in another medium, due to light, spread speed is different in two kinds of different materials, therefore in two kinds of Jie
The intersection direction of propagation of matter changes.In actual applications, the main refraction for considering light.The incidence angle of light and refraction angle it
Between relation, can be described with Snell's law (Snell's Law).Snell's law shows, when light wave is propagated from medium 1
During to medium 2, if the refractive index of two media is different, then existing picture can be reflected, its incident light and refraction light are all in same
One plane, referred to as plane of incidence, and meet following relation with the angle of interface normal：
n1sinθ1=n2sinθ2
Wherein, the refractive index of fluid is 1.3~1.5.If camera lens and adsorption element are separately positioned on the both sides of runner, i.e.,
Optical transport is needed by least three kinds media of the bubble in light transmission piece, fluid and fluid to camera lens.Ideally, light is from sky
Gas passes through uniform light transmission piece and fluid, and from above-mentioned snell law formula, the refraction of light is only with the refractive index of light transmission piece
There is relation；But it is likely to be mixed with bubble etc. in actual conditions, in fluid as uneven medium, light passes through the curved surface of bubble,
Different degrees of reflection and refraction can be produced, makes divergence of beam.The particle image so obtained is influenceed by bubble, follow-up
During calculating is handled, the accuracy for detecting and analyzing on physical characteristics such as its shape, size, textures can influence.
In addition, when illumination is mapped to fluid, a part can be absorbed, a part is scattered, and another part is directly through oil
Liquid, according to Beel-Lambert laws, i.e., a branch of monochromatic light exposure absorbs in an absorbing medium surface by certain thickness
After medium, a part of luminous energy due to Absorption of Medium, the intensity of transmitted light will weaken.The concentration of absorbing medium is bigger, medium
Thickness it is bigger, then the decrease of luminous intensity is more notable, and its relation is：
Wherein, A represents absorbance, and K is absorption coefficient or molar absorption coefficient, and l is the thickness of absorbing medium, and c is suction
Receive the concentration of medium, I0、It, T represent the intensity of incident light, the intensity of transmitted light and transmittance respectively.Therefore, camera lens is across dense
Magnetic particle images in the fluid that the higher coloured fluid of degree is collected, can seem unintelligible due to the decrease of luminous intensity,
Even it is difficult to be used for subsequent treatment.
In addition, the focusing range of existing fluid magnetic grain testing apparatus only has 1.8 times, also it is unfavorable for obtaining and clearly schemes
Picture, more can not be observed and be analyzed to the texture of particle.Had by magnifying power and optical path length, the relation of focal length：
Wherein, Γ is overall amplification, and △ is optical path length, and f is focal length, and negative sign represents that the image obtained is inverted image.
Therefore, the expansion of focusing range is realized according to prior art, it is necessary to which the volume of aggrandizement apparatus, changes camera lens costly.
This can undoubtedly increase the cost of device, reduce the occasion that equipment is suitably used.
The content of the invention
There is provided a kind of detection fluid magnetic-particle in order to solve the technical problem in the presence of prior art by the present invention
Apparatus and method, eliminate influence of the bubble to magnetic particle imaging in fluid, can detect quantity, the shape of magnetic particles in fluid
Shape, texture and size.
The device of present invention detection fluid magnetic-particle, adopts the following technical scheme that to realize：One kind detection fluid magnetic
The device of particle, including image-forming module, adsorption module, control module, light transmission piece and image processing module；Image-forming module, absorption
Module and light transmission piece are arranged on the same side of fluid course；Adsorption module is electrically connected with control module, be controlled by control module and
Absorption or release magnetic-particle；Light transmission piece is fixed on the upper surface of fluid course, the light path center positioned at image-forming module, light transmission piece
In magnetic field produced by after adsorption module energization, magnetic-particle is adsorbed onto below light transmission piece by adsorption module；Image procossing
Module is electrically connected with image-forming module, control module respectively, on after the picture signal processing of the magnetic-particle of image-forming module output
It is transmitted to control module；Control module carries out image analysis processing to picture signal, draws the physical characteristic data of magnetic-particle.
The adsorption module includes iron core frame, coil and excitation adsorption element；Excitation adsorption element is fixed on light transmission piece
Upper surface, is attached with light transmission piece；Adsorption element is connected with iron core frame, and coil is wrapped on iron core frame；The control module control
The energization and power-off of coil, make excitation adsorption element produce and lose magnetic force.
The excitation adsorption element is provided with two groups, and iron core frame also is provided with two groups, two groups of excitation adsorption elements and two groups of iron cores
Frame connects one to one；Two groups of excitation adsorption elements are symmetricly set on light transmission piece using the light path center of image-forming module as symmetry axis
On.
The image-forming module include image device, optical filter, lens barrel, lens group, focus adjusting mechanism, prism, objective lens with
And reflection source；Image device is located at the top of optical filter, and image device is connected with lens barrel；Reflected light is set gradually in lens barrel
Source, objective lens, focus adjusting mechanism, lens group and optical filter, prism are located between lens group and image device, reflection source position
In lens barrel bottom, focus adjusting mechanism is arranged in lens group；The light of reflection source is irradiated in light transmission piece.
The control module includes the whole control machine, host computer and the slave computer that are sequentially connected, slave computer respectively with runner
Pump, adsorption module, image-forming module connection, image processing module are connected with image-forming module, host computer respectively；Image processing module will
Picture signal after processing uploads to host computer, then uploads to whole control machine by host computer, and image recognition processing is done by controlling machine eventually.
Described image processing module includes analog to digital conversion circuit, picture processing chip and the image buffer storage core being sequentially connected
Piece, analog to digital conversion circuit is connected with image-forming module, and picture processing chip is connected with host computer.
The control module is controlled adsorption module as follows：It is powered directly to adsorption module with adsorption particle, then
Directly power off to discharge particle；Or be first powered with adsorption particle to adsorption module, it is then introduced into direction and is continually changing, increasingly
Small electric current is to discharge particle.
The method of present invention detection fluid magnetic-particle, is adopted the following technical scheme that：Comprise the following steps：
S1, slave computer receive the pump in the control command of host computer, control runner to adjust the flow velocity of fluid；
S2, slave computer receive the control command of host computer, and control adsorption module, which is powered, produces magnetic force, and light transmission piece starts absorption
Magnetic-particle in fluid；
The image of magnetic-particle is adsorbed in S3, unlatching image-forming module, collection light transmission piece, mould is exported to image processing module
Intend picture signal；
S4, image processing module are handled analog picture signal, are believed to the digital picture after host computer upload process
Number；Host computer is received after data image signal, and control command is sent to slave computer；Slave computer control adsorption module is powered off or to suction
Attached module importing direction is continually changing, less and less electric current, is made the magnetic force of adsorption module and is reduced, and discharges particle oil return liquid, accurate
It is standby to receive the control command from host computer next time, start new granular absorption, IMAQ, the circulating cycle of particle release
Phase；
The data image signal received is transferred to whole control machine by S5, host computer, by control eventually machine carry out on amounts of particles,
The calculating of shape, size and texture；The storage of control machine and display particle information, draw the conclusion of detection eventually.
Compared with prior art, the technical scheme that the present invention is provided has the following advantages that and beneficial effect：
1st, in structure design, excitation adsorption element is attached with the light transmission piece above runner so that final absorption is obtained
Fluid is no longer separated between magnetic-particle and camera lens in the fluid taken, it is to avoid the light reflection produced and folding because fluid is uneven
Penetrate, eliminate the influence of bubble refraction and opaque fluid to testing result in fluid, also eliminate fluid to luminous intensity
The harmful effect that is caused to magnetic particle imaging of abated effect.
2nd, focus adjusting mechanism can use thread transmission, worm-and-wheel gear, threads of lead screw mechanism, cam drive
Or the transmission mechanism such as linear electric motors.Under the cooperation of prism, focus adjusting mechanism can be realized stable in the range of 10-1000 times
Focus adjustment, obtain the particle image that becomes apparent from, final quantity, shape, texture and the dimension information for obtaining magnetic-particle,
Meet a variety of requirements in actual oil liquid detection.Detectable particle size is 1 μm to 2000 μm of diameter, 5 μm of diameter
Its specific texture structure of the particle observable of the above.
3rd, adsorption module includes induction coil, iron core frame and excitation adsorption element, passes through the power on/off of coil so that encourage
Magnetic suck part produces and lost magnetic force, realizes steady absorption and release to particle in fluid.
When induction coil is powered so that excitation adsorption element produces suction to particle, the magnetic field at excitation adsorption element the two poles of the earth is strong
Degree size is 2000Gs；When induction coil is powered off, the influence of magnetic hysteresis can be reduced, magnetic field intensity can drop to 60Gs quickly, release
Magnetic-particle is put, is not in the situation of particle residence, the normal operation of equipment is not interfered with.
Brief description of the drawings
Fig. 1 is the mechanical structure schematic diagram of apparatus of the present invention；
Fig. 2 is the control block diagram of apparatus of the present invention；
Fig. 3 is the flow chart of the inventive method；
In accompanying drawing, each part is as follows：1：Image device；2：Optical filter；3：Lens barrel；4：Lens group；5：Focus adjusting mechanism；6：Thing
Lens head；7：Reflection source；8：Iron core frame；9：Coil；10：Excitation adsorption element；11：Light transmission piece；12：Oil duct；13：Base；
201：Machine is controlled eventually；202：Host computer；203：Slave computer；204：Pump；205：Adsorption module；206：Oil circuit module；207：It is imaged mould
Block；208：Feedback module；209：Image processing module.
Embodiment
The present invention is described in further detail below by Figure of description and embodiment, but embodiment of the present invention is not
It is limited to this.
Embodiment
As shown in Figure 1, 2, the device of present invention detection fluid magnetic-particle includes：For gather magnetic particle images into
As module 207, adsorption module 205, eventually oil circuit module 206, control machine 201, host computer 202, slave computer 203.Image-forming module 207 is wrapped
Include image device 1, optical filter 2, lens barrel 3, lens group 4, focus adjusting mechanism 5, prism, objective lens 6 and reflection source 7.Absorption
Module 205 includes iron core frame 8, coil 9 and excitation adsorption element 10；Oil circuit module includes light transmission piece 11, oil duct 12 and base 13.
Image device 1 is located at the top of optical filter 2, and image device 1 is acquired as photo-sensitive cell to image, imager
Part 1 is connected with lens barrel 3；Optical filter 2 is used to filter the veiling glare that a part is scattered so that imaging is become apparent from naturally, to protect
Demonstrate,prove the definition of imaging；Lens barrel 3 is connected between image device 1 and oil circuit module 206, plays linking effect；Inside lens barrel 3 according to
Secondary setting reflection source 7, objective lens 6, focus adjusting mechanism 5, lens group 4 and optical filter 2, prism are located at lens group 4 and imaging
Between device 1, lens barrel plays a part of support, protection and fixed whole mechanism.Focus adjusting mechanism 5 is arranged in lens group 4, is used for
Adjust the distance between lens group 4 and oil duct 12, image device 1.Focus adjusting mechanism 5 can use thread transmission, worm gear snail
The transmission mechanisms such as linkage, threads of lead screw mechanism, cam drive or linear electric motors, to realize the steady of focussing process.
The reflection source 7 of the bottom of lens barrel 3 is placed in the lower section of objective lens 6, cooperates, and strengthens the brightness of image.
The plane of incidence and reflecting surface of prism are vertical, and in 90 ° of angles, other faces spray mirror face reflection coating, it is possible to achieve light
Line reflects twice in the prism, and direction changes, and will not be inverted；Prism coordinates focus adjusting mechanism 5 so that focusing range can be expanded to
1 to 20 times, the focusing range of 10 to 1000 times of acquisition.Prism extends the length of optical path in limited space, according to
The formula of overall amplification and optical path length：
Wherein, Γ is overall amplification, and △ is optical path length, and f is focal length, and negative sign represents that the image obtained is inverted image.
It follows that optical path is directly proportional to overall amplification.It should be noted that the present invention is not required for the plane of incidence of prism and anti-
The angle for penetrating face must be right angle, and the angle of the substantial plane of incidence and reflecting surface can have multiple angles, also may be not necessarily limited to
Pentaprism, as long as can increase light path, will not Inverted Image prism, be suitable for the present invention.
Image-forming module 207, adsorption module 205 and light transmission piece 11 are arranged on the same side of oil duct, and light transmission piece 11 is fixed on oil
Abrasive particle is adsorbed onto the lower section of light transmission piece 11 by road upper surface, excitation adsorption element 10.Excitation adsorption element 10 is provided with two groups, fixes
In the upper surface of light transmission piece 11, two groups of excitation adsorption elements 10 are attached with light transmission piece 11；Correspondingly, iron core frame 8 also is provided with two
Group, excitation adsorption element 10 connects one to one with two groups of iron core framves 8, equal wound around coil 9 on iron core frame 8.The light path of lens group 4
Center is directed at the center between two groups of excitation adsorption elements 10 and the center of image device 1, the light of reflection source 7
It is irradiated in light transmission piece 11.
Two groups of excitation adsorption elements 10 are symmetricly set on light transmission piece 11 using the light path center of image-forming module 207 as symmetry axis
On.In the present embodiment, two groups of excitation adsorption elements 10 are inclined in light transmission piece 11, one group of excitation adsorption element 10 with thoroughly
Angle between mating plate 11 is acute angle, and correspondingly the angle between another group of excitation adsorption element 10 and light transmission piece 11 is obtuse angle.
The distance between two groups of excitation adsorption elements 10 could be arranged to 0.1mm-4mm；And imaging region is in 4*4mm square scope
Interior, area is smaller, and the propagation of light is not influenceed.And light transmission piece 11, in visible-range, light transmittance is up to more than 90%；Printing opacity
The thickness of piece 11 is 0.2-3mm, as thin as possible, can choose 0.5mm thickness.
It is not essential features of the invention that excitation adsorption element 10, which sets two groups,；Correspondingly, it is coupled to twine
The iron core frame 8 for having coil 9 sets two groups nor the essential features of the present invention.That is, excitation adsorption element 10 and iron core frame 8
Quantity, do not constitute the restriction to technical solution of the present invention.Substantially, the present invention simply require excitation adsorption element with around
The iron core frame for having inductance coil is connected, and light transmission piece is located in the magnetic field produced by after inductance coil is powered, so that magnetic abrasive grain
Effectively it is adsorbed to below light transmission piece, is easy to image-forming module to obtain the image of abrasive particle.And between two groups of excitation adsorption elements 10
Center and reflection source 7, lens group 4 and the center of image device 1 in same light path.
Adsorption module 205 is close to oil circuit module 206.Excitation adsorption element 10 and the top of 206 pieces of internal oil channels of oil circuit mould 12
Light transmission piece 11 is attached so that is no longer separated with fluid and air between particle and objective lens 6 in the fluid that final absorption is obtained, is kept away
Exempt from because fluid is uneven, containing factors such as bubbles produce the reflection and refraction to light in fluid, and fluid is to luminous intensity
The influence that abated effect is caused to imaging.
The action principle of adsorption module 205 is the energization and power-off by coil 9 so that excitation adsorption element 10 produce and
Magnetic force is lost, to realize the steady absorption to particle in fluid and release.Induction coil 9 is powered so that excitation adsorption element 10
When producing suction to particle, the magnitude of field intensity at excitation adsorption element the two poles of the earth is 2000Gs；, can when induction coil 9 is powered off
The influence of magnetic hysteresis is reduced, magnetic field intensity can drop to 60Gs quickly, discharge particle, be not in the situation of particle residence, will not
Influence the normal operation of equipment.
During magnetize and demagnetize, except can it is above-mentioned directly to coil charges, electric discharge by way of realize
Outside the absorption and release of abrasive particle；It can also be realized by following technological means：First it is powered with adsorption particle to coil 9, then
Importing direction is continually changing, less and less electric current, so that the direction in conversion magnetic field and size repeatedly, to substantially reduce magnetic hysteresis
Influence, realizes the efficient release of particle.In general, completed in collection image, start demagnetization release abrasive particle, line is given using above-mentioned
Circle is first powered with adsorption particle, and the electric current that rear importing direction and size are continually changing, can be with to discharge the technological means of particle
Magnetic field size is rapidly decreased to less than the 10% of original magnetic field.
Described oil circuit module 206 is attached with the excitation adsorption element 10 in adsorption module 205, and oil circuit module includes oil duct
12nd, above oil duct light transmission piece 11 and the base 13 for guiding fluid to import and export and be located at below oil duct.The module rises
Guiding, the control of flow velocity and the supporting role to whole device to fluid are arrived.Oil circuit module can be with coutroi velocity, in oil
In the case of being not provided with pump in road, it can also control oil duct valve come coutroi velocity by slave computer 203, realize in equipment directly
Fluid gatherer detected.
Such as Fig. 2, whole control machine 201, host computer 202, slave computer 203 are sequentially connected, slave computer 203 respectively with pump 204, absorption
Coil 9, the valve of the oil duct of oil circuit module 206, the image device 1 of image-forming module 207 of module 205 are connected, 208 points of feedback module
It is not connected with image device 1, host computer 202, image processing module 209 is connected with image device 1, host computer 202 respectively.Image
Processing module 209 includes analog to digital conversion circuit, picture processing chip and the image buffer storage chip being sequentially connected.Host computer 202 leads to
Cross RS-485 communication modes to communicate with slave computer 203, image device 1 passes the analog picture signal gathered by USB interface
It is defeated to arrive image processing module 209, telecommunication is realized by Ethernet between host computer 202 and whole control machine 201.In image information
In transmittance process, the analog picture signal produced by image device 1 is converted to data image signal by analog to digital conversion circuit in order,
Then following image procossing is made to data image signal by picture processing chip：Rim detection, colour recognition, binaryzation, particle
Counting, dimensional measurement and texture analysis etc., the data image signal after processing uploads to host computer 202, then uploads to whole control machine
201, image recognition processing is done by controlling machine 201 eventually, the physical characteristic numbers such as the quantity on particle, texture, size and dimension are obtained
According to, with database contrast, obtain final result.
Wherein, feedback module 208 is implemented as picture after the imaging that have received image-forming module 207 completes command signal
Module 207 shoots the signal feedback and image information feedback completed.Feedback module 208 is connected with host computer 202, anti-according to its
Feedforward information, host computer 202 judges once to shoot whether the cycle terminates, then slave computer 203 is transmitted and instructed, by slave computer 203
Electric current in the coil 9 in adsorption module 205 is controlled, to realize the absorption and release of abrasive particle；Wherein, slave computer 203 is in coil 9
The control of electric current, can be that to the direct-electrifying of coil 9 or power-off, i.e., direct charge and discharge system is realized the absorption of abrasive particle and released
Put or be first powered to coil 9 with adsorption particle, the electric current that rear importing direction and size are continually changing is to discharge
Grain.
The method of present invention detection fluid magnetic-particle, as shown in figure 3, comprising the following steps：Fluid is imported into oil first
In road, the flow velocity of fluid can be adjusted by the controlling pump 204 of slave computer 203, adsorption magnetic force, regulation absorption magnetic are produced by electromagnetic induction
Power, after certain action time, carries out IMAQ；Obtained image information is handled, quantity, the shape of particle is calculated
Shape, size, storage and display particle information, draw the conclusion of detection.
(1) fluid is imported in oil duct, fluid can be circulated in oil duct；
(2) slave computer 203 receives the control command of host computer 202, and controlling pump 204 is to adjust the flow velocity of fluid；
(3) slave computer 203 receives the control command of host computer 202, and control coil 9 is powered, and excitation adsorption element 10 is produced
Magnetic force, light transmission piece starts to adsorb the magnetic-particle in fluid；
(4) image that magnetic-particle is adsorbed in reflection source, image device collection light transmission piece is opened, to image procossing mould
Block exports analog picture signal；
(5) image processing module is handled analog picture signal, is believed to the digital picture after host computer upload process
Number；Host computer is received after data image signal, and control command is sent to slave computer；Slave computer control coil is powered off or led to coil
Enter direction be continually changing, less and less electric current, make excitation adsorption element magnetic force reduction, discharge particle oil return liquid, prepare receive
The control command from host computer, starts new granular absorption, IMAQ, the cycle period of particle release next time；
(6) data image signal received is transferred to whole control machine by host computer, by control eventually machine carry out on amounts of particles,
The calculating of shape, size and texture；The storage of control machine and display particle information, draw the conclusion of detection eventually.
Above-described embodiment is only preferably embodiment, but embodiments of the present invention are not by above-described embodiment of the invention
Limitation, other it is any without departing from Spirit Essences and the change made under principle of the present invention, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (10)
1. it is a kind of detect fluid magnetic-particle device, it is characterised in that including image-forming module, adsorption module, control module, thoroughly
Mating plate and image processing module；Image-forming module, adsorption module and light transmission piece are arranged on the same side of fluid course；Adsorption module with
Control module is electrically connected, and is controlled by control module and is adsorbed or discharge magnetic-particle；Light transmission piece is fixed on the upper table of fluid course
Face, the light path center positioned at image-forming module, light transmission piece are located in the magnetic field produced by after adsorption module is powered, and adsorption module is by magnetic
Property granular absorption to below light transmission piece；Image processing module is electrically connected with image-forming module, control module respectively, defeated to image-forming module
Control module is uploaded to after the picture signal processing of the magnetic-particle gone out；Control module is carried out at graphical analysis to picture signal
Reason, draws the physical characteristic data of magnetic-particle.
2. device according to claim 1, it is characterised in that the adsorption module includes iron core frame, coil and excitation and inhaled
Attached part；Excitation adsorption element is fixed on the upper surface of light transmission piece, is attached with light transmission piece；Excitation adsorption element connects with iron core frame
Connect, coil is wrapped on iron core frame；The energization and power-off of the control module control coil, make excitation adsorption element produce and lose
Demagnetization force.
3. device according to claim 2, it is characterised in that the excitation adsorption element is provided with two groups, and iron core frame is also set
There are two groups, two groups of excitation adsorption elements connect one to one with two groups of iron core framves；Two groups of excitation adsorption elements are with image-forming module
Light path center is symmetry axis, is symmetricly set in light transmission piece.
4. device according to claim 1, it is characterised in that the image-forming module includes image device, optical filter, mirror
Cylinder, lens group, focus adjusting mechanism, prism, objective lens and reflection source；Image device is located at the top of optical filter, imager
Part is connected with lens barrel；Reflection source, objective lens, focus adjusting mechanism, lens group and optical filter, prism position are set gradually in lens barrel
Between lens group and image device, reflection source is located at lens barrel bottom, and focus adjusting mechanism is arranged in lens group；Reflection source
Light be irradiated in light transmission piece；The prism is used to increase light path, and will not Inverted Image.
5. device according to claim 4, it is characterised in that the plane of incidence and reflecting surface of the prism are vertical, other faces
Spray mirror face reflection coating.
6. device according to claim 1, it is characterised in that whole control machine that the control module includes being sequentially connected, on
Position machine and slave computer, slave computer is connected with the pump in runner, adsorption module, image-forming module respectively, image processing module respectively with
Image-forming module, host computer connection；Picture signal after processing is uploaded to host computer by image processing module, then is uploaded by host computer
To machine is controlled eventually, image recognition processing is done by controlling machine eventually.
7. device according to claim 1, it is characterised in that the modulus that described image processing module includes being sequentially connected turns
Circuit, picture processing chip and image buffer storage chip are changed, analog to digital conversion circuit is connected with image-forming module.
8. device according to claim 1, it is characterised in that the control module is controlled adsorption module as follows：
It is powered directly to adsorption module with adsorption particle, then directly powers off to discharge particle；Or be first powered to inhaling to adsorption module
Attached particle, is then introduced into that direction is continually changing, less and less electric current to be to discharge particle.
9. the method for the detection fluid magnetic-particle based on claim 6 described device, it is characterised in that comprise the following steps：
S1, slave computer receive the pump in the control command of host computer, control runner to adjust the flow velocity of fluid；
S2, slave computer receive the control command of host computer, and control adsorption module, which is powered, produces magnetic force, and light transmission piece starts to adsorb fluid
In magnetic-particle；
The image of magnetic-particle is adsorbed in S3, unlatching image-forming module, collection light transmission piece, simulation drawing is exported to image processing module
As signal；
S4, image processing module are handled analog picture signal, the data image signal to after host computer upload process；On
Position machine is received after data image signal, and control command is sent to slave computer；Absorption mould is given in slave computer control adsorption module power-off
Block importing direction is continually changing, less and less electric current, is made the magnetic force of adsorption module and is reduced, and is discharged particle oil return liquid, is prepared to connect
The once control command from host computer is accepted, starts new granular absorption, IMAQ, the cycle period of particle release；
The data image signal received is transferred to whole control machine by S5, host computer, is carried out by controlling machine eventually on amounts of particles, shape
The calculating of shape, size and texture；The storage of control machine and display particle information, draw the conclusion of detection eventually.
10. the method for fluid magnetic-particle is detected according to claim 9, it is characterised in that described image processing module bag
The analog to digital conversion circuit being sequentially connected, picture processing chip and image buffer storage chip are included, analog to digital conversion circuit connects with image-forming module
Connect, picture processing chip is connected with host computer, picture processing chip makees following image procossing to data image signal：Examine at edge
Survey, colour recognition, binaryzation, grain count, dimensional measurement and texture analysis.
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| CN109084683B (en) * | 2018-10-19 | 2023-11-28 | 广东中道创意科技有限公司 | Particulate matter detection device |
| CN109470606B (en) * | 2018-11-02 | 2021-05-25 | 大连海事大学 | Microfluid inductance type oil detection device |
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| JP3416733B2 (en) * | 2000-08-30 | 2003-06-16 | 大阪大学長 | Method and apparatus for measuring magnetic susceptibility of suspended magnetic fine particles |
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| CN2501048Y (en) * | 2001-04-28 | 2002-07-17 | 西安交通大学 | On-line monitoring iron-spectrum instrument |
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