CN202614786U - PIV experiment calibration device - Google Patents
PIV experiment calibration device Download PDFInfo
- Publication number
- CN202614786U CN202614786U CN 201220176072 CN201220176072U CN202614786U CN 202614786 U CN202614786 U CN 202614786U CN 201220176072 CN201220176072 CN 201220176072 CN 201220176072 U CN201220176072 U CN 201220176072U CN 202614786 U CN202614786 U CN 202614786U
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- piv
- calibration
- test
- demarcation
- calibration device
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Abstract
The utility model relates to a PIV experiment calibration device. The technical problem to be solved is to provide a device to be capable of having the advantages of small experimental error, simple structure, convenient operation, high security, and low cost. The technical scheme adopted by the PIV experiment calibration device is that: the PIV experiment calibration device is characterized by comprising a calibration water tank which is positioned within the irradiation range of a laser system with an opening at the top part and is filled with water, and a calibration target disc is arranged in the calibration water tank; and the calibration water tank is formed by bonding five acrylic flat plates arranged at the bottom part and four side surfaces.
Description
Technical field
The utility model relates to particle image velocimetry technology (PIV), particularly a kind of PIV test caliberating device.
Background technology
The particle image velocimetry technology (PIV) that late 1970s is grown up by the solid speckle method has broken through the restriction of traditional spot measurement, can instantaneous noncontacting measurement flow field in velocity distribution on cross section, have higher measuring accuracy.Its ultimate principle is: in the flow field, dispense trace particle; And incide in institute's flow measurement field with pulse sheet radiant; Through double or multiexposure, multiple exposure, the image of particle is recorded on egative film or the CCD camera one by one, adopts optics Young fringe method, correlation method or cross-correlation method then; The image of PIV egative film or CCD cameras record is handled in pointwise, obtains flow field velocity and distributes.
Adopt particle image velocimetry technology (PIV) that the velocity field of centrifugal pump inside is measured, can obtain the velocity field in the centrifugal pump impeller leaf groove.Quantitatively understand the inner actual liquid flow movement situation of impeller,, improve pump performance and have great significance improving and improve the characteristic of centrifugal pump design method.
Carry out before any PIV measurement, the accurate correction demarcated the step that is absolutely necessary.Usually the staking-out work of 3D-PIV need be placed into an on-gauge plate on the position with the strict coplane of sheet illuminating bundle exactly.Demarcation is through taking pictures and then analyzes completion at five five equilibrium cross section places of 1mm sheet laser demarcating target disc; The initial point of planimetric coordinates is middle crosshair; Spacing horizontal and longitudinal grid is 1mm, and five section middle section Z coordinates of five equilibrium sheet laser are 0.The point that can be confirmed to demarcate on the target disc by uncalibrated image is the corresponding relation of the position of the position of fluid space mid point and the image mid point that left and right sides camera obtains.
Demarcation is the important step that guarantees the PIV measuring accuracy.Timing signal under existing operating environment is placed on the position of laser sheet optical coplane with target disc, and test pump is that transparent organic glass (acrylic material) is processed; But when PIV tests; Laser beam will pass air, organic glass and water, must reflect, and the timing signal target disc be placed in the air; Laser beam only passes air; Very big difference is arranged when refraction situation and test, and therefore experiment is not carried out under identical conditions with demarcation, has increased the error of test.
Summary of the invention
The purpose of the utility model is the deficiency that overcomes in the above-mentioned background technology, and a kind of PIV test caliberating device is provided, and it is little, simple in structure that this device should have test error, easy to operate, safe, characteristics with low cost.
The technical scheme that the utility model provides is:
PIV tests caliberating device, it is characterized in that: said PIV test caliberating device comprises the demarcation tank of the filled with water that is positioned at laser system range of exposures and top end opening, and said demarcation tank is built-in with one and demarcates target disc.
Said demarcation tank by the bottom and all around 5 acrylic gluing flats of side form.
The beneficial effect of the utility model is:
Because the material of the demarcation tank in the utility model is with finally to test used test pump identical; And fill water in the timing signal tank; Timing signal with when test system identical to the refraction situation of laser; Make like this to demarcate and under identical conditions, carry out, thereby significantly reduced the error of test with test.In addition, the utility model also has characteristics simple in structure, easy to operate, safe and with low cost.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with Figure of description, the utility model is described further, but the utility model is not limited to following examples.The described PIV test of the utility model caliberating device is as shown in Figure 1.
PIV tests caliberating device; This device comprises the demarcation tank 2 that is positioned at the laser system range of exposures and filled with water top end opening, places one in the said demarcation tank and demarcates target disc 3 (the used demarcation target disc of the utility model is the two-sided bilateral demarcation target disc of Technical Sourcing Internation).
Timing signal will finally be tested the test pump of usefulness and removed, and the utility model is placed on the position at test pump place, and in tank topped up with water, be placed in the tank position with test pump testing section coplane with demarcating target disc; Open laser system 1 then and send sheet light, adjustment sheet light makes itself and target disc coplane; Open CCD camera 4 at last, regulate the focal length and the aperture of camera and accomplish demarcation; After demarcating completion tank is removed and test pump is retracted, go to experiment.
Demarcation tank in the utility model by the bottom and all around 5 acrylic gluing flats of side form, customizable.
Claims (2)
1.PIV the test caliberating device is characterized in that: said PIV test caliberating device comprises the demarcation tank (2) of the filled with water that is positioned at laser system range of exposures and top end opening, and said demarcation tank is built-in with one and demarcates target disc (3).
2. PIV according to claim 1 test caliberating device is characterized in that: said demarcation tank by the bottom and all around 5 acrylic gluing flats of side form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220176072 CN202614786U (en) | 2012-04-23 | 2012-04-23 | PIV experiment calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220176072 CN202614786U (en) | 2012-04-23 | 2012-04-23 | PIV experiment calibration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202614786U true CN202614786U (en) | 2012-12-19 |
Family
ID=47348475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220176072 Expired - Lifetime CN202614786U (en) | 2012-04-23 | 2012-04-23 | PIV experiment calibration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202614786U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459209A (en) * | 2014-12-11 | 2015-03-25 | 哈尔滨工业大学 | Calibration method for measuring flow fields in irregular geometries through laser beams |
| CN108627114A (en) * | 2018-04-20 | 2018-10-09 | 宁波大学 | Inside soil body visualization of 3 d deformation measurement method |
| CN112504627A (en) * | 2020-11-20 | 2021-03-16 | 中国船舶科学研究中心 | Simple calibration method for right-angle section cavity water drum PIV |
| CN112525275A (en) * | 2020-12-02 | 2021-03-19 | 中国计量科学研究院 | Pipeline three-dimensional flow field measurement system based on PIV method |
| CN113758674A (en) * | 2021-08-03 | 2021-12-07 | 河海大学 | PIV device and method for synchronously observing water and sand phases |
-
2012
- 2012-04-23 CN CN 201220176072 patent/CN202614786U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459209A (en) * | 2014-12-11 | 2015-03-25 | 哈尔滨工业大学 | Calibration method for measuring flow fields in irregular geometries through laser beams |
| CN108627114A (en) * | 2018-04-20 | 2018-10-09 | 宁波大学 | Inside soil body visualization of 3 d deformation measurement method |
| CN112504627A (en) * | 2020-11-20 | 2021-03-16 | 中国船舶科学研究中心 | Simple calibration method for right-angle section cavity water drum PIV |
| CN112504627B (en) * | 2020-11-20 | 2023-08-15 | 中国船舶科学研究中心 | Simple calibration method for PIV of right-angle section cavitation water drum |
| CN112525275A (en) * | 2020-12-02 | 2021-03-19 | 中国计量科学研究院 | Pipeline three-dimensional flow field measurement system based on PIV method |
| CN113758674A (en) * | 2021-08-03 | 2021-12-07 | 河海大学 | PIV device and method for synchronously observing water and sand phases |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121219 |