CN210625997U - PIV test measuring device based on organic glass water tank - Google Patents
PIV test measuring device based on organic glass water tank Download PDFInfo
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- CN210625997U CN210625997U CN201921736455.4U CN201921736455U CN210625997U CN 210625997 U CN210625997 U CN 210625997U CN 201921736455 U CN201921736455 U CN 201921736455U CN 210625997 U CN210625997 U CN 210625997U
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Abstract
The utility model provides a PIV test measuring device based on organic glass basin, which comprises a water tank, the pond passes through the raceway and is connected with the organic glass basin, the rectifier grid has been placed to organic glass basin anterior segment, organic glass basin middle part is provided with the test area, respectively connect with a fish blocking net around the test area, organic glass basin rear end sets up hinge formula tail-gate, organic glass basin middle part test area top and organic glass basin left side wall respectively paste a white paper, respectively erect a strobe light at the upper end and the left end of white paper, erect first camera and second camera for the one end of white paper, respectively put a dress water organic glass prism in the test area organic glass basin left and right sides, the other third camera and the fourth camera of respectively having erect of dress water glass prism. The device can reconstruct the shape of the three-dimensional fish and carry out three-dimensional measurement on the flow field of the whole body of the fish.
Description
Technical Field
The utility model belongs to the three-dimensional field of testing the speed in flow field, in particular to experimental measuring device of PIV based on organic glass basin.
Background
The correct design of an effective fishway is very important for the safety and improvement of a plurality of fishes, and how to measure and improve the flow field in the fishway is a problem to be solved urgently. Each fish has unique physical characteristics that should be considered when designing a fishway installation. For example, trout and salmon are able to swim in very fast water because of their very fast burst rates, while some other fish, such as northern pikes, and micropteres, are unable to pass very fast water due to moderate burst rates. Other factors such as energy dissipation, turbulence in the water flow, resting area, inlet location, suction velocity and space in the pond should also be carefully considered when designing the fish access facility. Therefore, the flow field measurement can be carried out more comprehensively by utilizing the Particle Image Velocimetry (PIV), and the method has important significance for fish way design and fish way improvement.
Since the flow in the fishway is generally complex, PIV is a suitable experimental technique for obtaining a velocity field. Standard 2D-PIV (2D2C) measures the velocity of two components in one plane with one camera, while Stereo-PIV (2D3C) measures the velocity of three components in one plane with two cameras. Due to the price problem, a simple (2D3C) measurement method is commonly adopted at present, most of flow fields analyze the flow field change of the fish with the same view port plane, the flow field of the whole body of the three-dimensional fish is rarely measured, and PIV equipment is not simple enough.
Disclosure of Invention
In view of the technical problem that the background art exists, the utility model provides a experimental measuring device of PIV based on organic glass basin compares with the two-dimensional flow field commonly used at present, and the shape of three-dimensional fish can be rebuild to this PIV system to carry out three-dimensional measurement to its whole body flow field.
In order to solve the technical problem, the utility model discloses following technical scheme has been taken and has been realized:
a PIV test measuring device based on an organic glass water tank comprises a water tank, wherein the water tank is connected with the organic glass water tank through a water delivery pipe, a rectifier grid is placed at the front section of the organic glass water tank, a test area is arranged in the middle of the organic glass water tank, the front and the back of the test area are respectively connected through a fish blocking net, a hinge type tail door is arranged at the rear end of the organic glass water tank, white paper is respectively pasted above the test area in the middle of the organic glass water tank and on the left side wall of the organic glass water tank, a stroboscopic lamp is respectively erected at the upper end and the left end of the white paper, a first camera and a second camera are erected relative to one end of the white paper, water-containing organic glass prisms are respectively placed at the left side and the right; the first camera, the second camera, the third camera and the fourth camera are connected with the video recorder through network cables, and the video recorder is connected with the computer through the network cables; a laser pen support is arranged beside the organic glass water tank, a laser pen is arranged on the laser pen support, a plane mirror is arranged at the bottom of the organic glass water tank, and the plane mirror is used for emitting a sheet light source reflected by the laser pen.
In a preferred scheme, the first camera and the second camera are arranged perpendicular to the organic glass water tank.
In the preferred scheme, the laser pen include the casing, the back lid department of casing is equipped with shift knob, shift knob is connected with the battery electricity, shift knob is used for controlling the laser lamp break-make, the battery setting is equipped with the light passageway in the casing, the laser lamp sets up in the bottom of light passageway, movably is equipped with the laser refraction device in the light passageway.
In a preferred scheme, the laser refraction device comprises an external thread cylinder, one end of the external thread cylinder is connected with a sliding block, a hole is formed in the center of the sliding block, the hole and the external thread cylinder are coaxially arranged, and a prism is arranged at the other end of the external thread cylinder; an external screw thread section of thick bamboo and regulation internal thread section of thick bamboo threaded connection, the sliding block sets up in the slide, the slide be the structure that the light passageway expands the chisel outward.
In a preferred scheme, the prism is connected up and down through a spring.
This patent can reach following beneficial effect:
1. the PIV system is a simple measuring device, and can save cost. Compared with the currently common two-dimensional flow field, the PIV system can reconstruct the shape of the three-dimensional fish and carry out three-dimensional measurement on the flow field of the whole body.
2. The sheet light source with the proper size can be adjusted by rotating the adjusting internal thread cylinder, and the design can save a bracket for installing the prism and save space.
Drawings
The invention will be further explained with reference to the following figures and examples:
FIG. 1 is a diagram of a PIV test measurement apparatus in use;
FIG. 2 is a layout of a PIV test measurement device with the plexiglass water tank not installed;
FIG. 3 is an external view of the retractable laser pen;
FIG. 4 is a diagram of a laser refraction device;
fig. 5 is a cross-sectional view of the retractable laser pointer.
In the figure: organic glass basin 1, flow straightener 2, fish blocking net 3, hinge formula tail-gate 4, raceway 5, pond 7, strobe light 8, white paper 9, dress water organic glass prism 10, first camera 11, second camera 12, third camera 13, fourth camera 14, level crossing 15, laser pen support 16, laser pen 17, video recorder 18, computer 19, laser lamp 20, external screw thread section of thick bamboo 21, sliding block 22, adjust internal screw thread section of thick bamboo 23, slide 24, back lid 25, shift knob 26, prism 27.
Detailed Description
The preferable scheme is as shown in figures 1 and 2, the PIV test measuring device based on the organic glass water tank comprises a water tank 7, the water tank 7 is connected with the organic glass water tank 1 through a water conveying pipe 5, a rectifier grid 2 is arranged at the front section of the organic glass water tank 1, a test area is arranged in the middle of the organic glass water tank 1, the front and the back of the test area are respectively connected through a fish blocking net 3, a hinge type tail gate 4 is arranged at the rear end of the organic glass water tank 1, white paper 9 is respectively pasted above the test area in the middle of the organic glass water tank 1 and on the left side wall of the organic glass water tank 1, one stroboscopic lamp 8 is respectively arranged at the upper end and the left end of the white paper, a first camera 11 and a second camera 12 are arranged at one end opposite to the white paper 9, a water-containing organic glass prism 10 is respectively arranged at the left side and the right side of the organic glass water tank 1 in the test area, and a third camera 13 and a fourth camera 14 are respectively erected beside the water-containing organic glass prism 10; the first camera 11, the second camera 12, the third camera 13 and the fourth camera 14 are connected with the video recorder 18 through network cables, and the video recorder 18 is connected with the computer 19 through the network cables; a laser pen support 16 is arranged beside the organic glass water tank 1, a laser pen 17 is arranged on the laser pen support 16, a plane mirror 15 is arranged at the bottom of the organic glass water tank 1, and the plane mirror 15 is used for emitting a sheet light source reflected by the laser pen 17.
The first camera 11, the second camera 12, the third camera 13 and the fourth camera 14 are high speed cameras of the type Casio EX10 with a focal length of 4 mm.
Further, a first camera 11 and a second camera 12 are arranged perpendicular to the plexiglas gutter 1.
The working principle of the device is as follows:
the test is carried out in organic glass basin 1, and organic glass basin 1 mid portion sets up the test area, and test area length is 1000mm, and the span is 200mm, keeps apart through blocking fish net 3. Water is delivered through a water pipe 5 by starting a self-priming water pump 6. Firstly, water is rectified through the rectifying grid 2, so that water flow smoothly enters the organic glass water tank 1. And a strobe light 8 is respectively arranged above and at the left end of the test area and used for supplementing light. A piece of white paper 9 is placed at the right end and below the strobe light 8 for diffusing the light. A first camera 11 and a second camera 12 are placed on both sides of the tank for viewing the same area. An organic glass homemade prism filled with water is respectively arranged in front of the third camera 13 and the fourth camera 14, so that light rays vertically enter the organic glass water tank 1, and the third camera 13 and the fourth camera 14 are used for observing the position of the fish. In addition, the laser pen support 16 is used for fixing the laser pen 17, light rays emitted by the laser pen 17 and having the thickness of about 2mm vertically enter the organic glass water tank 1 after being reflected by the plane reflector 15, and the light rays can irradiate the whole test area. Water flow enters the water pool 7 through the test area through the hinge type tail gate 4, and the hinge type tail gate 4 is used for adjusting the water level. The video recorder 18 is used to store the pictures taken by the high-speed cameras, and the computer 19 is used to display images and process the images. During testing, after the water flow in the organic glass water tank 1 reaches a certain flow and is in a laminar flow state, tracer particles with good following performance are scattered in a test area, so that the tracer particles are uniformly distributed in water. And then, putting the fish between the rectifier grid 2 and the fish blocking net 3 for adaptation for 20 mins. After the adaptation is finished, the test fish is put into a test area. To minimize the potential interference effects of a strong laser, the laser is turned on only when the fish enters the test area. Each high-speed camera is used for recording images and transmitting the images to the computer 19 for image processing and corresponding flow field analysis. The utility model aims to provide a simple and easy PIV test measuring device, and PIV test measuring method is recorded in "a three-dimensional PIV image processing method based on cross-correlation" thesis published in "hydrodynamics research and progress" journal.
By adjusting the rotating speed of the self-suction water pump, water flow carrying tracer particles smoothly enters the organic glass water tank 1 after being rectified by the rectifying grid 2. A first camera 11 and a second camera 12 are erected on the same section of a test area, and are mainly used for three-dimensional flow field measurement. The strobe light 8 mainly supplements light to make the image clearer. The sheet light source emitted by the laser lamp passes through the organic glass water tank 1 after being reflected by the plane mirror 15 to illuminate the whole test area. In addition, the self-refrigerating water-containing organic glass is mainly used for refracting the imaging of the third camera 13 and the fourth camera 14, and the imaging is mainly used for recording the position of the fish and the synthesis of the later shape of the fish. All cameras shoot synchronously, and finally, a computer is used for image synthesis and flow field analysis.
Further, the laser pen 17 includes the casing, and the back lid 25 department of casing is equipped with shift knob 26, and shift knob 26 is connected with the battery electricity, and shift knob 26 is used for controlling the break-make of laser lamp 20, and the battery setting is equipped with the light passageway in the casing, and laser lamp 20 sets up in the bottom of light passageway, and movably is equipped with the laser refraction device in the light passageway.
Further, the laser refraction device comprises an external thread cylinder 21, one end of the external thread cylinder 21 is connected with a sliding block 22, a hole is formed in the center of the sliding block 22, the hole and the external thread cylinder 21 are coaxially arranged, and a prism 27 is arranged at the other end of the external thread cylinder 21; an external screw thread section of thick bamboo 21 and the threaded connection of adjusting internal screw thread section of thick bamboo 23, sliding block 22 sets up in slide 24, slide 24 be the structure that the light passageway expands the chisel outward.
Further, the prism 27 is connected up and down by a spring.
The use principle of the telescopic laser pen is as follows:
the light beam emitted by the retractable laser pen passes through the hollow external thread cylinder 21 and is refracted by the prism 27 to be converted into a sheet light. The external thread cylinder 21 and the adjusting internal thread cylinder 23 are connected through threads, the external thread cylinder 21 with the prism can move back and forth by rotating the adjusting internal thread cylinder 23, and the purpose of moving back and forth is to adjust a sheet light source with a proper size. In addition, the front section of the screw thread cylinder 21 is designed into a semi-concave type, which mainly aims at preventing the interference of the emitted light source.
Claims (5)
1. The utility model provides a PIV test measurement device based on organic glass basin, includes pond (7), and pond (7) are connected with organic glass basin (1) through raceway (5), and rectifier grid (2) have been placed to organic glass basin (1) anterior segment, and organic glass basin (1) middle part is provided with the test area, respectively connects with a fish blocking net (3) around the test area, and organic glass basin (1) rear end sets up hinge formula tail-gate (4), its characterized in that: white paper (9) is respectively pasted above a middle test area of the organic glass water tank (1) and on the left side wall of the organic glass water tank (1), stroboscopic lamps (8) are respectively erected at the upper end and the left end of the white paper, a first camera (11) and a second camera (12) are erected relative to one end of the white paper (9), water-containing organic glass prisms (10) are respectively placed on the left side and the right side of the organic glass water tank (1) in the test area, and a third camera (13) and a fourth camera (14) are respectively erected beside the water-containing organic glass prisms (10); the first camera (11), the second camera (12), the third camera (13) and the fourth camera (14) are connected with the video recorder (18) through network cables, and the video recorder (18) is connected with the computer (19) through the network cables; a laser pen support (16) is arranged beside the organic glass water tank (1), a laser pen (17) is arranged on the laser pen support (16), a plane mirror (15) is arranged at the bottom of the organic glass water tank (1), and the plane mirror (15) is used for emitting a sheet light source reflected by the laser pen (17).
2. The plexiglass sink-based PIV test measuring device of claim 1, wherein: the light of the first camera (11) and the light of the second camera (12) are arranged vertical to the organic glass water tank (1).
3. The plexiglass sink-based PIV test measuring device of claim 1, wherein: laser pen (17) include the casing, and back lid (25) department of casing is equipped with shift knob (26), and shift knob (26) are connected with the battery electricity, and shift knob (26) are used for controlling laser lamp (20) break-make, and the battery setting is equipped with the light passageway in the casing, and laser lamp (20) set up in the bottom of light passageway, and movably is equipped with the laser refraction device in the light passageway.
4. The plexiglass sink-based PIV test measuring device of claim 3, wherein: the laser refraction device comprises an external thread cylinder (21), one end of the external thread cylinder (21) is connected with a sliding block (22), a hole is formed in the center of the sliding block (22), the hole and the external thread cylinder (21) are coaxially arranged, and a prism (27) is arranged at the other end of the external thread cylinder (21); an external screw thread section of thick bamboo (21) and regulation internal screw thread section of thick bamboo (23) threaded connection, sliding block (22) set up in slide (24), slide (24) for the structure that the light passageway expands the chisel outward.
5. The plexiglass sink-based PIV test measuring device of claim 4, wherein: the prism (27) is connected up and down through a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921736455.4U CN210625997U (en) | 2019-10-16 | 2019-10-16 | PIV test measuring device based on organic glass water tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921736455.4U CN210625997U (en) | 2019-10-16 | 2019-10-16 | PIV test measuring device based on organic glass water tank |
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| Publication Number | Publication Date |
|---|---|
| CN210625997U true CN210625997U (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921736455.4U Expired - Fee Related CN210625997U (en) | 2019-10-16 | 2019-10-16 | PIV test measuring device based on organic glass water tank |
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| CN (1) | CN210625997U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485466A (en) * | 2020-11-13 | 2021-03-12 | 长江水利委员会长江科学院 | Calibration system and method of three-dimensional pulsating flow velocity measuring device |
| CN112526171A (en) * | 2020-11-13 | 2021-03-19 | 长江水利委员会长江科学院 | Calibration system and method of one-dimensional pulsating flow velocity measuring device |
-
2019
- 2019-10-16 CN CN201921736455.4U patent/CN210625997U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485466A (en) * | 2020-11-13 | 2021-03-12 | 长江水利委员会长江科学院 | Calibration system and method of three-dimensional pulsating flow velocity measuring device |
| CN112526171A (en) * | 2020-11-13 | 2021-03-19 | 长江水利委员会长江科学院 | Calibration system and method of one-dimensional pulsating flow velocity measuring device |
| CN112526171B (en) * | 2020-11-13 | 2022-10-21 | 长江水利委员会长江科学院 | Calibration system and method of one-dimensional pulsating flow velocity measuring device |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20200526 Termination date: 20201016 |