CN209048126U - A kind of three-dimensional flow speed dynamic monitor - Google Patents
A kind of three-dimensional flow speed dynamic monitor Download PDFInfo
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- CN209048126U CN209048126U CN201821246667.XU CN201821246667U CN209048126U CN 209048126 U CN209048126 U CN 209048126U CN 201821246667 U CN201821246667 U CN 201821246667U CN 209048126 U CN209048126 U CN 209048126U
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- index matching
- flow speed
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- dimensional flow
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Abstract
The utility model discloses a kind of three-dimensional flow speed dynamic monitors, including laser light source, laser alignment mirror in cover cylinder on main optical path, beam expanding lens, frosted glass plate, test tube, index matching pond, first motor, telecentric lens and Image Acquisition camera, it is CCD camera that described image, which acquires camera, the test tube is placed in index matching pond, the first motor driving test tube rotation, the laser beam of the laser light source output successively passes through laser alignment mirror in cover cylinder on main optical path, beam expanding lens and frosted glass plate enter in index matching pond, the laser beam being emitted from index matching pond is entered in Image Acquisition camera by telecentric lens.The utility model carries out Image Acquisition operation by each angle to sample to be tested, realizes to the real-time relative dimensional speed monitoring of vascular flow, utilizes the relationship for contrasting value and speed, contrast value by observation, the real-time dynamic monitoring to speed may be implemented, data calculation amount is lower, strong real-time.
Description
Technical field
The utility model relates to blood flow velocity monitoring technical fields.
Background technique
Currently, mainly realizing related monitoring using following several technical solutions in blood flow velocity monitoring technical field
Function；
The first technical solution is ultrasonic Doppler (Ultrasound Doppler) blood flow detection, and this method passes through measurement
The frequency shift amount that the echo that two beam incident ultrasound waves are scattered by red blood cell generates, measurement frequency of sound wave change and calculate two dimension with this
Project blood flow velocity；Second of technical solution is that blood flow velocity is measured based on image processing techniques, and this method is pre- before the assay
Certain time interval is first set, then is captured with industrial camera, two field pictures is obtained, compares same cell in the position of two field pictures
Difference is set, thus the distance of fluids within pipes flowing, can be obtained pipeline by the ratio between flow path and the time interval of setting
The flow velocity of fluid；The third technical solution is laser Doppler velocimetry (LDV), and the frequency displacement by analyzing incident light calculates flow velocity, when sharp
When illumination is mapped in moving object, Particles Moving causes the change for scattering optical frequency shift, and collection of scattered light and incident light are handled
The frequency shift amount of incident light can be calculated, and frequency shift amount is directly proportional to scattering light particle movement velocity, asks the variation of fluid velocity at this time
Be converted to the variation for seeking frequency；4th kind of technical solution is laser speckle contrast imaging two dimension blood flow velocity monitoring method, the party
Method, which is first found out in 20 grayscale images along time shaft, contrasts value, finds out phase with square relationship being inversely proportional of speed further according to contrasting
To speed.
Wherein influence of the accuracy of the first technical solution measurement vulnerable to doppler angle, makes the blood flow velocity measured simultaneously
Non-genuine flow velocity, and the factors such as scattering particles size, concentration will affect the accuracy of tachometric survey；Second of technical solution
Illumination is required it is high, vulnerable to such environmental effects, and it measure be only blood flow projection speed also non-genuine flow velocity；Third
What laser-Doppler obtained in kind technical solution is single-point flow rate information, and monitoring whole audience velocity flow profile must introduce scanning means to group
Carry out point by point scanning, time limited resolution are knitted, and the flow velocity of its measurement is not still true flow velocity；4th kind of technical solution
Monitoring is two-dimentional blood flow projection relative velocity, and measurement be projection relative velocity is not true relative velocity.
But without learning blood flow velocity specific size in current certain monitoring projects, need to only dynamic prison be carried out to blood flow velocity
It surveys, i.e., need to only detect blood flow velocity and become faster or slack-off relative to previous moment, this monitoring project is required of energy
The variation of enough monitor blood flow actual speeds, thus establish 3 D stereo blood distribution figure to be only this monitoring project desired.
Utility model content
Technical problem to be solved by the utility model is: how to carry out quick dynamic monitoring to blood flow velocity.
The solution that the utility model solves its technical problem is:
A kind of three-dimensional flow speed dynamic monitor, including laser light source, laser alignment mirror in cover cylinder on main optical path, beam expanding lens, frosted glass plate,
Test tube, index matching pond, first motor, telecentric lens and Image Acquisition camera, described image acquisition camera preferentially select
CCD camera, the test tube are placed in index matching pond, the first motor driving test tube rotation, the laser light source output
Laser beam successively pass through laser alignment mirror in cover cylinder on main optical path, beam expanding lens and frosted glass plate and enter in index matching pond, from refractive index
Laser beam with pond outgoing is entered in Image Acquisition camera by telecentric lens.
As a further improvement of the above technical scheme, the present apparatus further includes the first elevating mechanism and the second elevator
Structure, the beam expanding lens are mounted in the first elevating mechanism, and the telecentric lens and Image Acquisition camera are installed in second liter
On descending mechanism.
As a further improvement of the above technical scheme, first elevating mechanism and the second elevating mechanism are connect more
Bar elevating mechanism.
As a further improvement of the above technical scheme, the present apparatus further includes horizontal mobile mechanism, second elevator
Structure is mounted on horizontal mobile mechanism.
As a further improvement of the above technical scheme, the horizontal mobile mechanism includes pedestal, loading stage, the second motor
And operation screw rod, the pedestal are equipped with sliding rail, on the slide rail, the loading stage is equipped with horizontal lead to for the loading stage setting
Hole, the through-hole are equipped with the helicitic texture being mutually matched with operation screw rod, the through hole whorl company of the operation screw rod and loading stage
It connects, the second motor driver operation screw rod rotation, second elevating mechanism is arranged on loading stage.
As a further improvement of the above technical scheme, the first motor is servo motor, and second motor is step
Into motor.
It is adopted the beneficial effects of the utility model are: the utility model carries out image by each angle to sample to be tested
Collection operates and simultaneously contrast operation, then will treated multiple images data successively carry out Hilbert transform, derivation and anti-
Projection algorithm, and carry out the total space time along each cross section normal direction inverse projection respectively and smear, realize the real-time phase to vascular flow
Three-dimensional velocity is monitored, using the relationship for contrasting value and speed is inversely proportional, value is contrasted by observation, the reality to speed may be implemented
When dynamic monitoring.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described.Obviously, described attached drawing is a part of the embodiment of the utility model, rather than complete
Portion's embodiment, those skilled in the art without creative efforts, can also be obtained according to these attached drawings it
His design scheme and attached drawing.
Fig. 1 is the apparatus structure schematic diagram of the utility model.
Specific embodiment
It is carried out below with reference to technical effect of the embodiment and attached drawing to the design of the utility model, specific structure and generation
It clearly and completely describes, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is a part of the embodiment of the utility model, rather than whole embodiments, it is based on the embodiments of the present invention, the skill of this field
Art personnel other embodiments obtained without creative efforts belong to the model of the utility model protection
It encloses.In addition, all connection/connection relationships being previously mentioned in text, not singly refer to that component directly connects, and referring to can be according to specific reality
Situation is applied, by adding or reducing couple auxiliary, Lai Zucheng more preferably coupling structure.Each technology in the invention is special
Sign, can be with combination of interactions under the premise of not conflicting conflict.
Referring to Fig.1, the invention discloses a kind of three-dimensional flow speed dynamic monitor, including laser light source 1, swashs
Light collimating mirror 2, beam expanding lens 3, frosted glass plate 4, test tube 5, index matching pond 6, first motor 7, telecentric lens 8 and image are adopted
Collect camera 9, described image acquires the preferentially selection CCD camera of camera 9, it is not limited to CCD camera, the test tube 5 is placed in folding
It penetrates in rate match-pool 6, the first motor 7 drives test tube 5 to rotate, and the laser beam that the laser light source 1 exports is successively through too drastic
Light collimating mirror 2, beam expanding lens 3 and frosted glass plate 4 enter in index matching pond 6, the laser being emitted from index matching pond 6
Light beam is entered in Image Acquisition camera 9 by telecentric lens 8.Wherein the effect of the beam expanding lens 3 and frosted glass plate 4 is main
It is to be loaded in the sample to be tested in test tube 5 by first motor for being evenly radiated into laser beam in index matching pond 6
7 drivings carry out intermittent rotation, to realize to the image collecting function under sample to be tested all angles.
The concrete principle of the invention is as follows: when beam of coherent light uniform irradiation is in coarse body surface, reaching
Since there are the interference images that optical path difference forms random distribution, i.e. speckle between the rear orientation light of receiving plane.But scattering particles
When movement, interference figure can change at any time, and the collected speckle image of CCD camera will within certain time for exposure
It is obscured due to time integral effect, this fog-level is contrasted by speckle to be reflected.Therefore speckle, which contrasts, contains
The motion information of scattering particles can be obtained by two-dimentional blood distribution by the statistical analysis that speckle image room and time changes
Figure.It need to only be increased by sample to be tested image contrast i.e. in the invention, contrast reduction, in conjunction with actual speed and the pass contrasted
The monitoring to observation object movement velocity can be realized in system, calculates the blood flow velocity of sample to be tested under each angle, obtains most
Big blood flow velocity, that is, three-dimensional flow speed.
Specifically, the invention carries out Image Acquisition operation by each angle to sample to be tested and contrasts
Operation, then by treated, multiple images data successively carry out Hilbert transform, derivation and backprojection algorithm, and respectively
The total space time is carried out along each cross section normal direction inverse projection to smear, and realizes the real-time relative dimensional speed monitoring to vascular flow,
The relationship being inversely proportional using value and speed is contrasted contrasts value by observation, the real-time dynamic monitoring to speed may be implemented.
It is further used as preferred embodiment, in the invention specific embodiment, the present apparatus further includes first liter
Descending mechanism 11 and the second elevating mechanism 12, the beam expanding lens 3 are mounted in the first elevating mechanism 11, the telecentric lens 8 with
And Image Acquisition camera 9 is installed on the second elevating mechanism 12.Specifically, the invention passes through first elevating mechanism
11 and second elevating mechanism 12 setting, realize to the height adjustment of beam expanding lens 3, telecentric lens 8 and Image Acquisition camera 9
Function improves the received quality of laser beam, makes 9 imaging effect of Image Acquisition camera more preferably.
It is further used as preferred embodiment, in the invention specific embodiment, first elevating mechanism 11
And second elevating mechanism 12 be multi link elevating mechanism.
It is further used as preferred embodiment, in the invention specific embodiment, the present apparatus further includes horizontal shifting
Motivation structure, second elevating mechanism 12 are mounted on horizontal mobile mechanism.Specifically, the invention passes through the horizontal shifting
The setting of motivation structure, the imaging surface to adjust Image Acquisition camera 9 make imaging effect more preferably at a distance from index matching pond 6.
It is further used as preferred embodiment, in the invention specific embodiment, the horizontal mobile mechanism packet
Pedestal 131, loading stage 132, the second motor 134 and operation screw rod 133 are included, the pedestal 131 is equipped with sliding rail 135, described
Loading stage 132 is arranged on sliding rail 135, and the loading stage 132 is equipped with horizontal through-hole, and the through-hole is equipped with and operation screw rod
133 helicitic textures being mutually matched, the operation screw rod 133 are connect with the through hole whorl of loading stage 132, second motor
134 driving operation screw rods 133 rotate, and second elevating mechanism 12 is arranged on loading stage 132.
It is further used as preferred embodiment, in the invention specific embodiment, the first motor 7 is servo
Motor, second motor 134 is stepper motor.Specifically, the first motor 7 as described in the invention is needed to test tube 5
Intermittent rotation is carried out, the precision of control is more demanding, therefore the invention is using servo motor as first motor
7, to improve the precision of the rotation of test tube 5.
The better embodiment of the utility model is illustrated above, but the invention be not limited to it is described
Embodiment, those skilled in the art can also make various equivalent changes without departing from the spirit of the present invention
Type or replacement, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.
Claims (6)
1. a kind of three-dimensional flow speed dynamic monitor, it is characterised in that: including laser light source (1), laser alignment mirror in cover cylinder on main optical path (2),
Beam expanding lens (3), frosted glass plate (4), test tube (5), index matching pond (6), first motor (7), telecentric lens (8) and image
It acquiring camera (9), the test tube (5) is placed in index matching pond (6), first motor (7) driving test tube (5) rotation,
The laser beam of laser light source (1) output successively passes through laser alignment mirror in cover cylinder on main optical path (2), beam expanding lens (3) and frosted glass plate (4) and enters
To in index matching pond (6), the laser beam being emitted from index matching pond (6) enters image by telecentric lens (8)
It acquires in camera (9).
2. a kind of three-dimensional flow speed dynamic monitor according to claim 1, it is characterised in that: further include first liter
Descending mechanism (11) and the second elevating mechanism (12), the beam expanding lens (3) are mounted in the first elevating mechanism (11), the telecentricity
Camera lens (8) and Image Acquisition camera (9) are installed on the second elevating mechanism (12).
3. a kind of three-dimensional flow speed dynamic monitor according to claim 2, it is characterised in that: first lifting
Mechanism (11) and the second elevating mechanism (12) are multi link elevating mechanisms.
4. a kind of three-dimensional flow speed dynamic monitor according to claim 2, it is characterised in that: further include horizontal shifting
Motivation structure, second elevating mechanism (12) are mounted on horizontal mobile mechanism.
5. a kind of three-dimensional flow speed dynamic monitor according to claim 4, it is characterised in that: described to move horizontally
Mechanism includes pedestal (131), loading stage (132), the second motor (134) and operates screw rod (133), on the pedestal (131)
Equipped with sliding rail (135), the loading stage (132) is arranged on sliding rail (135), and the loading stage (132) is equipped with horizontal through-hole,
The through-hole is equipped with and operation screw rod (133) helicitic texture that is mutually matched, the operation screw rod (133) and loading stage (132)
Through hole whorl connection, second motor (134) driving operation screw rod (133) rotation, second elevating mechanism (12) sets
It sets on loading stage (132).
6. a kind of three-dimensional flow speed dynamic monitor according to claim 5, it is characterised in that: the first motor
It (7) is servo motor, second motor (134) is stepper motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821246667.XU CN209048126U (en) | 2018-08-03 | 2018-08-03 | A kind of three-dimensional flow speed dynamic monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821246667.XU CN209048126U (en) | 2018-08-03 | 2018-08-03 | A kind of three-dimensional flow speed dynamic monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209048126U true CN209048126U (en) | 2019-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821246667.XU Expired - Fee Related CN209048126U (en) | 2018-08-03 | 2018-08-03 | A kind of three-dimensional flow speed dynamic monitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109044325A (en) * | 2018-08-03 | 2018-12-21 | 佛山科学技术学院 | A kind of three-dimensional flow speed dynamic monitor and method |
-
2018
- 2018-08-03 CN CN201821246667.XU patent/CN209048126U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109044325A (en) * | 2018-08-03 | 2018-12-21 | 佛山科学技术学院 | A kind of three-dimensional flow speed dynamic monitor and method |
| CN109044325B (en) * | 2018-08-03 | 2023-09-26 | 佛山科学技术学院 | Three-dimensional blood flow velocity dynamic monitoring device and method |
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| CF01 | Termination of patent right due to non-payment of annual fee |