CN202149905U - Horizontal supporting and adjusting mechanism for PIV calibrating target - Google Patents
Horizontal supporting and adjusting mechanism for PIV calibrating target Download PDFInfo
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- CN202149905U CN202149905U CN201120238888U CN201120238888U CN202149905U CN 202149905 U CN202149905 U CN 202149905U CN 201120238888 U CN201120238888 U CN 201120238888U CN 201120238888 U CN201120238888 U CN 201120238888U CN 202149905 U CN202149905 U CN 202149905U
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Abstract
A horizontal supporting and adjusting mechanism for a PIV (Particle Image Velocimetry) calibrating target comprises a fixing chassis, a vertical support and an adjusting plate used for installing the calibrating target, wherein the vertical support is fixedly arranged on the fixing chassis, the vertical support is provided with a vertical groove, and the adjusting plate is slidably arranged in the vertical groove. The horizontal supporting and adjusting mechanism of the utility model has the advantages of reduced calibrating difficulty, higher adjusting efficiency and smaller space occupancy.
Description
Technical field
The utility model relates to the demarcation target that is used for three dimensional particles imaging knotmeter (PIV) calibration process and supports governor motion.
Background technology
Traditional fluid-velocity survey instrument can only carry out spot measurement, and be contact type measurement, can't the flow field in the whole zone not had disturbance and measures.PIV technology (Particle Image Velocimetry is called for short PIV) has overcome the limitation of spot measurement in the flow-field test in the past, is a kind of very promising no disturbance flow field survey technology.The particle imaging knotmeter is the measurement that realizes stream field through the instantaneous velocity of measuring trace particle.When utilizing the flow velocity on the PIV commercial measurement two dimensional surface, need be in the two dimensional surface of measuring following property of uniform broadcasting, reflective is good and the proportion trace particle suitable with fluid, the use picture pick-up device obtains the moving image of trace particle.Moving image to trace particle is analyzed, and just can obtain the velocity flow profile of two-dimensional flow field.A certain trace particle moves on two dimensional surface in the flow field, and its displacement on x, y both direction over time.
When measuring the flow velocity of flow surface, can under the natural lighting condition, make an experiment; And inner two-dimensional flow field of convection cell or three-dimensional flow field just must use the supplementary plate light illumination when measuring, and promptly get sheet laser through laser instrument and shine the cross section that needs to measure and get on.Be a very fine job on the cross section of wanting to make sheet laser accurately rest on required measurement, this makes the corrector strip light source become key to the work of measured section.
The essence of camera calibration is according to the volume coordinate of target on the known calibration target and the coordinate on the picture plane thereof, find the solution the process of the concrete analytic expression of mapping function, so the quality of calibration algorithm is the major reason that influences stated accuracy.System need demarcate the inside and outside parameter of camera, is should be accurately quick again to the requirement of scaling method.The demarcation target of using in the calibration process is the two dimensional panel; Under the load of precision micro-displacement mechanism; In the sheet optical thickness, locate along the translation of sheet light vertical direction; System need gather in the camera field depth at least three locational demarcation target images and carry out the non-coplane of monoscopic and demarcate, and is high to the positioning accuracy request of mechanical mechanism.The sheet parallel light throws light on equably and demarcates target and vertical with the plane of camera optical axis formation.The sheet light and the deviation of demarcating between the target are one of principal elements of measuring error in the calibration process, therefore demarcate target and the strict coplane of sheet light (being that requirement sheet light and camera are as plane parallel in essence) is the key and the difficult point of this calibration technique.Nominal data derives from the target of demarcating on the target in fact, and target is generally regular shapes such as circle, rectangle (angle point) or cross on the target, is grid configuration and arranges, and is convenient to the extraction of target inconocenter coordinate.When adopting two dimensional surface to demarcate target, the bearing accuracy of micro-displacement mechanism is generally in micron dimension.
The existing support governor motion that is not exclusively used in the PIV demarcation, this makes the difficulty of demarcating strengthen, and can not demarcate quickly and easily.
Summary of the invention
In order to overcome big, the adjusting deficiency that efficient is lower, space occupancy is bigger of demarcation difficulty that existing PIV demarcates the support governor motion of target, the utility model provides a kind of reduces the demarcation difficulty, regulate the PIV that efficient is higher, space occupancy is less demarcates target horizontal support governor motion.
The utility model solves the technical scheme that its technical matters adopted:
A kind of PIV demarcates target horizontal support governor motion; Comprise fixed underpan, vertical support frame and in order to the adjustable plate of demarcating target to be installed; Said vertical support frame is fixedly mounted on the fixed underpan, has vertical slot on the said vertical support frame, and said adjustable plate is slidably mounted in the vertical slot.
Further, said adjustable plate is the rectangular band orifice plate, is provided with four mounting holes around the said adjustable plate, and said demarcation target is installed in said four mounting holes, and the interstitial hole of said adjustable plate is installed in the said vertical slot.
The technical conceive of the utility model is: demarcate target but PIV demarcates target horizontal support governor motion horizontal support, but up-down adjustment is demarcated target, is fixed in suitable position with bolt.
The beneficial effect of the utility model mainly shows: operation fast, to regulate efficient high, only needs shirtsleeve operation to make to demarcate target to be fixed in the desired position, and avoid demarcating target and in calibration process, be shifted.
Description of drawings
Fig. 1 is the synoptic diagram that PIV demarcates target horizontal support governor motion.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
With reference to Fig. 1; A kind of PIV demarcates target horizontal support governor motion; Comprise fixed underpan 1, vertical support frame 2 and in order to the adjustable plate 3 of demarcating target to be installed; Said vertical support frame 2 is fixedly mounted on the fixed underpan 1, has vertical slot on the said vertical support frame 2, and said adjustable plate 3 is slidably mounted in the vertical slot.
Said adjustable plate 3 is the rectangular band orifice plate, is provided with four mounting holes around the said adjustable plate 3, and said demarcation target is installed in said four mounting holes, and the interstitial hole of said adjustable plate 3 is installed in the said vertical slot.
In the present embodiment, but horizontal support governor motion horizontal support is demarcated target, can up-down adjustment demarcate target at diverse location secured adjusted plate 3, is fixed in the suitable position of vertical slot with bolt.
PIV demarcation target horizontal support governor motion degree of regulation is moderate, adjusting efficient is high, space occupancy is little, only needs shirtsleeve operation can make the demarcation target adjust to desired location.
The described content of this instructions embodiment only is enumerating the way of realization of utility model design; The protection domain of the utility model should not be regarded as and only limit to the concrete form that embodiment states, the protection domain of the utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.
Claims (2)
1. a PIV demarcates target horizontal support governor motion; It is characterized in that: said horizontal support governor motion comprises fixed underpan, vertical support frame and in order to the adjustable plate of demarcating target to be installed; Said vertical support frame is fixedly mounted on the fixed underpan; Have vertical slot on the said vertical support frame, said adjustable plate is slidably mounted in the vertical slot.
2. PIV as claimed in claim 1 demarcates target horizontal support governor motion; It is characterized in that: said adjustable plate is the rectangular band orifice plate; Be provided with four mounting holes around the said adjustable plate; Said demarcation target is installed in said four mounting holes, and the interstitial hole of said adjustable plate is installed in the said vertical slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120238888U CN202149905U (en) | 2011-07-07 | 2011-07-07 | Horizontal supporting and adjusting mechanism for PIV calibrating target |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120238888U CN202149905U (en) | 2011-07-07 | 2011-07-07 | Horizontal supporting and adjusting mechanism for PIV calibrating target |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202149905U true CN202149905U (en) | 2012-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120238888U Expired - Fee Related CN202149905U (en) | 2011-07-07 | 2011-07-07 | Horizontal supporting and adjusting mechanism for PIV calibrating target |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202149905U (en) |
Cited By (3)
| 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 |
| CN109061228A (en) * | 2018-06-19 | 2018-12-21 | 哈尔滨工程大学 | A kind of caliberating device of PIV equipment |
| CN115933109A (en) * | 2022-11-29 | 2023-04-07 | 哈尔滨工程大学 | Optical auxiliary system suitable for cross-medium inclined shooting of camera in multi-camera PIV test |
-
2011
- 2011-07-07 CN CN201120238888U patent/CN202149905U/en not_active Expired - Fee Related
Cited By (4)
| 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 |
| CN109061228A (en) * | 2018-06-19 | 2018-12-21 | 哈尔滨工程大学 | A kind of caliberating device of PIV equipment |
| CN109061228B (en) * | 2018-06-19 | 2020-09-25 | 哈尔滨工程大学 | Calibration device of PIV equipment |
| CN115933109A (en) * | 2022-11-29 | 2023-04-07 | 哈尔滨工程大学 | Optical auxiliary system suitable for cross-medium inclined shooting of camera in multi-camera PIV test |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120222 Termination date: 20140707 |
|
| EXPY | Termination of patent right or utility model |