CN114509238A - Water surface light guide device and flow measurement system suitable for indoor water tank test - Google Patents
Water surface light guide device and flow measurement system suitable for indoor water tank test Download PDFInfo
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- CN114509238A CN114509238A CN202111661507.8A CN202111661507A CN114509238A CN 114509238 A CN114509238 A CN 114509238A CN 202111661507 A CN202111661507 A CN 202111661507A CN 114509238 A CN114509238 A CN 114509238A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 238000005259 measurement Methods 0.000 title claims abstract description 36
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 20
- 230000003014 reinforcing effect Effects 0.000 claims description 15
- 239000005304 optical glass Substances 0.000 claims description 13
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 13
- 238000007747 plating Methods 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000010409 ironing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 230000003028 elevating effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/26—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting optical wave
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- General Physics & Mathematics (AREA)
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- Aviation & Aerospace Engineering (AREA)
- Fluid Mechanics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a water surface light guide device and a flow measurement system suitable for an indoor water tank test, and relates to the field of laser flow measurement. The water surface light guide device and the flow measurement system suitable for the indoor water tank test have the advantages that the measuring frame is simple in structure, convenient to assemble and disassemble and capable of being flexibly used for the indoor water tank test; the high-speed camera and the laser have a three-direction adjusting function, so that the PIV measurement accuracy and the arrangement efficiency are improved, and the measurement frame can slide on the rail and can accurately and conveniently move to a measurement position; surface of water leaded light device below the leading-in surface of water of laser, can avoid the undulant laser refraction influence that causes of surface of water, and measuring frame can carry out size adjustment to the experimental basin of different width, and the effect of use is better for traditional mode.
Description
Technical Field
The invention relates to the field of laser flow measurement, in particular to a water surface light guide device and a flow measurement system suitable for an indoor water tank test.
Background
For the measurement of the flow rate in the laboratory test water tank, the currently common devices are: the measuring device comprises a propeller type current meter, an acoustic Doppler current meter and a particle imaging current meter, but the measuring device has some defects, the propeller type current meter and an ADV need to be inserted into water flow, a disturbance effect can be generated on test water flow, the accuracy of current measurement is influenced, the current measurement is difficult to carry out in the area close to the wall and the bottom of a groove, the PIV adopts laser to illuminate particles in a water body, and a photographing calculation flow field is carried out, so that the water flow can not be disturbed, the current measurement of the current flow in a large-range area can be realized, the method is a main popular measuring technology at present, but a PIV measuring system is complex, a plurality of measuring devices are arranged, the requirement on the installation precision of the measuring devices is high, the workload of determining the installation position of the device and installing and debugging is large during measurement, and the contradiction is extremely prominent during the mobile measurement of multiple sections.
When a PIV measuring system is used for measuring the flow velocity of a water tank, a method that laser enters from the bottom of a glass water tank to illuminate a water body is generally adopted, the laser arrangement method can avoid the influence caused by water surface fluctuation, but for an opaque water tank test that materials such as pebbles are paved at the bottom of the water tank, the laser enters from the bottom of the glass water tank and can be completely blocked by the materials such as pebbles paved at the bottom of the water tank, and the laser is difficult to enter a water flow area.
Disclosure of Invention
The invention mainly aims to provide a water surface light guide device and a flow measurement system suitable for an indoor water tank test, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that: a water surface light guide device and a flow measuring system suitable for an indoor water tank test comprise a bottom platform, wherein a test water tank is arranged on the outer surface of the upper end of the bottom platform, a large frame bottom plate is arranged on the outer surface of the upper end of the test water tank, measuring frames are arranged on the outer surfaces of two sides of the large frame bottom plate, a laser is arranged on the outer surface of the upper end of each measuring frame, a bracket vertical plate is arranged on the outer surface of one end of the laser, a transverse sliding table module and a vertical sliding table module are arranged on the outer surface of one end of each bracket vertical plate, the transverse sliding table module is positioned on one side of the vertical sliding table module, a bracket flat plate is arranged on the outer surface of the other end of each bracket vertical plate, a bracket reinforcing plate is arranged between each bracket vertical plate and the bracket flat plate, a camera platform is arranged in the middle of each measuring frame and comprises a lifting base, an aluminum oxide lifting platform upper platform surface and a high-speed camera, the aluminum oxide elevating platform is located the upper end surface of elevating base, the last mesa of aluminum oxide elevating platform is located the upper end surface of aluminum oxide elevating platform, high-speed camera is located the upper end surface of the last mesa of aluminum oxide elevating platform, the upper end surface of big frame bottom plate is provided with the section bar, the upper end surface of section bar is provided with the base, the upper end surface of base is provided with the riser, be provided with the gusset plate between base and the riser, the lower extreme surface of big frame bottom plate is provided with the stainless steel wheel, the dull rod of plating and ball screw are provided with to the dull surface of the dull and stereotyped lower extreme surface of bracket, the plating pole is located ball screw's both sides, ball screw's one end surface is provided with the optical glass piece, the one end lower surface of big frame bottom plate is provided with big frame bottom plate reinforcing bar.
Preferably, the outer surface of the upper end of the bottom platform is detachably connected with the outer surface of the lower end of the test water tank, and the outer surface of the lower end of the big frame bottom plate is movably connected with the outer surface of the upper end of the test water tank through a stainless steel wheel.
Preferably, the outer surfaces of the two sides of the big frame bottom plate are detachably connected with the outer surface of one end of the measuring frame, and the inner surface of one end of the measuring frame is detachably connected with the outer surface of one end of the camera platform.
Preferably, the outer surface of the upper end of the lifting base is detachably connected with the outer surface of the lower end of the aluminum oxide lifting table, the outer surface of the upper end of the aluminum oxide lifting table is detachably connected with the outer surface of the lower end of the upper table top of the aluminum oxide lifting table, and the outer surface of the upper end of the upper table top of the aluminum oxide lifting table is detachably connected with the outer surface of the lower end of the high-speed camera.
Preferably, the outer surface of one end of the bracket vertical plate is detachably connected with the outer surface of one end of the transverse sliding table module, the outer surface of the other end of the bracket vertical plate is detachably connected with the outer surface of one end of the bracket flat plate, and the bracket vertical plate and the bracket flat plate are detachably connected with the bracket reinforcing plate.
Preferably, the outer surface of the lower end of the bracket plate is detachably connected with the outer surface of one end of the branding rod, the outer surface of the lower end of the bracket plate is detachably connected with the outer surface of one end of the ball screw, the branding rods are two groups in number, and a glass platform is arranged between the ball screw and the optical glass sheet.
Preferably, the outer surface of the upper end of the large frame bottom plate is detachably connected with the outer surface of the lower end of the section bar, and the outer surface of the upper end of the section bar is detachably connected with the outer surface of the lower end of the base.
Preferably, the outer surface of the upper end of the base is detachably connected with the outer surface of the lower end of the vertical plate, and the base and the vertical plate are detachably connected with the reinforcing plate.
Compared with the prior art, the invention has the following beneficial effects: the water surface light guide device and the flow measurement system suitable for the indoor water tank test have the advantages that the measurement frame is simple in structure, convenient to assemble and disassemble and capable of being flexibly used for the indoor water tank test; the high-speed camera and the laser have a three-direction adjusting function, so that the PIV measurement accuracy and the arrangement efficiency are improved, and the measurement frame can slide on the rail and can accurately and conveniently move to a measurement position; surface of water leaded light device below the leading-in surface of water of laser, can avoid the undulant laser refraction influence that causes of surface of water, and measuring frame can carry out size adjustment to the experimental basin of different width, and the effect of use is better for traditional mode.
Drawings
FIG. 1 is a schematic view of the overall structure of a water surface light guide device and a flow measurement system suitable for an indoor water tank test according to the present invention;
FIG. 2 is a side view of an experimental water tank 2 of a water surface light guide device and a flow measurement system suitable for an indoor water tank test according to the present invention;
fig. 3 is a structural diagram of a water surface light guide device and a flow measurement system camera platform 4 suitable for an indoor water tank test.
In the figure: 1. a base table; 2. a test water tank; 3. a measuring frame; 4. a camera platform; 401. a lifting base; 402. an alumina lifting platform; 403. an upper table top of the alumina lifting table; 404. a high-speed camera; 5. a transverse sliding table module; 6. a vertical sliding table module; 7. a laser; 8. a big frame bottom plate; 9. 50 section bar; 10. a base; 11. a reinforcing plate; 12. a vertical plate; 13. a bracket vertical plate; 14. a bracket reinforcing plate; 15. a cradle plate; 16. a stainless steel wheel; 17. reinforcing strips for the bottom plate of the big frame; 18. plating a cauterizing rod; 19. a ball screw; 20. an optical glass sheet.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in FIGS. 1-3, a water surface light guide device and a flow measurement system suitable for an indoor water tank test comprises a base platform 1, wherein a test water tank 2 is arranged on the outer surface of the upper end of the base platform 1, a large frame bottom plate 8 is arranged on the outer surface of the upper end of the test water tank 2, measuring frames 3 are arranged on the outer surfaces of two sides of the large frame bottom plate 8, a laser 7 is arranged on the outer surface of the upper end of each measuring frame 3, a bracket vertical plate 13 is arranged on the outer surface of one end of each laser 7, a transverse sliding table module 5 and a vertical sliding table module 6 are arranged on the outer surface of one end of each bracket vertical plate 13, the transverse sliding table module 5 is positioned on one side of the vertical sliding table module 6, a bracket flat plate 15 is arranged on the outer surface of the other end of each bracket vertical plate 13, a bracket reinforcing plate 14 is arranged between each bracket vertical plate 15 and the middle of each measuring frame 3, a camera platform 4 is arranged on the middle portion of each measuring frame 3 and comprises a lifting base 401, The alumina elevating platform 402 is provided with an alumina elevating platform, an upper alumina lifting platform surface 403 and a high-speed camera 404, the alumina lifting platform 402 is located on the upper end outer surface of a lifting base 401, the upper alumina lifting platform surface 403 is located on the upper end outer surface of the alumina lifting platform 402, the high-speed camera 404 is located on the upper end outer surface of the upper alumina lifting platform surface 403, the upper end outer surface of a large frame bottom plate 8 is provided with a 50-shaped material 9, the upper end outer surface of the 50-shaped material 9 is provided with a base 10, the upper end outer surface of the base 10 is provided with a vertical plate 12, a reinforcing plate 11 is arranged between the base 10 and the vertical plate 12, the lower end outer surface of the large frame bottom plate 8 is provided with a stainless steel wheel 16, the lower end outer surface of a bracket flat plate 15 is provided with a plating and ironing rod 18 and a ball screw rod 19, the plating and ironing rod 18 is located on two sides of the ball screw rod 19, the one end outer surface of the ball screw rod 19 is provided with an optical glass sheet 20, and the lower end lower surface of the large frame bottom plate 8 is provided with a large frame bottom plate reinforcing strip 17.
Furthermore, the outer surface of the upper end of the bottom platform 1 is detachably connected with the outer surface of the lower end of the test water tank 2, the outer surface of the lower end of the big frame bottom plate 8 is movably connected with the outer surface of the upper end of the test water tank 2 through a stainless steel wheel 16, and the stainless steel wheel 16 is convenient for the big frame bottom plate 8 to move on the test water tank 2 when in use.
Furthermore, the outer surfaces of the two sides of the large frame bottom plate 8 are detachably connected with the outer surface of one end of the measuring frame 3, the inner surface of one end of the measuring frame 3 is detachably connected with the outer surface of one end of the camera platform 4, and the platforms can be conveniently mounted when the device is used.
Further, the outer surface of the upper end of the lifting base 401 is detachably connected with the outer surface of the lower end of the alumina lifting platform 402, the outer surface of the upper end of the alumina lifting platform 402 is detachably connected with the outer surface of the lower end of the upper platform 403 of the alumina lifting platform, the outer surface of the upper end of the upper platform 403 of the alumina lifting platform is detachably connected with the outer surface of the lower end of the high-speed camera 404, and the lifting base 401, the alumina lifting platform 402, the upper platform 403 of the alumina lifting platform and the high-speed camera 404 form a camera platform 4 and the camera platform 4.
Further, the one end surface of bracket riser 13 can be dismantled with the one end surface of horizontal slip table module 5 and be connected, and the other end surface of bracket riser 13 can be dismantled with the one end surface of the dull and stereotyped 15 of bracket and be connected, and bracket riser 13 and the dull and stereotyped 15 of bracket can be dismantled with bracket gusset plate 14 and be connected, and bracket riser 13, the dull and stereotyped 15 of bracket, bracket gusset plate 14, horizontal slip table module 5 and vertical slip table module 6 constitute laser platform.
Furthermore, the outer surface of the lower end of the bracket flat plate 15 is detachably connected with the outer surface of one end of the plating cauterizing rod 18, the outer surface of the lower end of the bracket flat plate 15 is detachably connected with the outer surface of one end of the ball screw 19, the number of the plating cauterizing rods 18 is two, a glass platform is arranged between the ball screw 19 and the optical glass sheet 20, and the ball screw 19, the plating cauterizing rods 18, the optical glass sheet 20 and the glass platform form a water surface light guide platform.
Furthermore, the outer surface of the upper end of the large frame bottom plate 8 is detachably connected with the outer surface of the lower end of the 50 section bar 9, the outer surface of the upper end of the 50 section bar 9 is detachably connected with the outer surface of the lower end of the base 10, and the 50 section bar 9 is convenient for fixing the base 10.
Further, the upper end surface of base 10 can be dismantled with the lower extreme surface of riser 12 and be connected, and base 10 and riser 12 all can be dismantled with gusset plate 11 and be connected, and riser 12, base 10, gusset plate 11 and big frame bottom plate 8 constitute laser platform auxiliary device, and laser platform auxiliary device mainly is for fixed support laser platform, links together laser platform and measuring frame 3 simultaneously.
High-frequency high accuracy PIV measurement system:
the high-frequency high-precision PIV measuring system comprises a high-speed camera, a laser, an image collector and a PIV flow field calculation program, wherein the high-speed camera is a CMOS camera, the highest resolution is 2560 multiplied by 1920, the full frame frequency is 800Hz, the memory of the camera is 4.8G, the collected image is in an 8-bit BMP format, the camera is communicated with a local area network constructed by a computer through an Ethernet to realize image data transmission, the laser is a laser of 8W semiconductor continuous laser, the laser is a sheet light with the wavelength of 532nm, the thickness is about 1mm, and the PIV flow field is calculated through autonomous programming.
It should be noted that the invention is a water surface light guide device and a flow measurement system suitable for an indoor water tank test, and the flow measurement system has the working procedures that: firstly, determining a test section of an indoor water tank, fixing a measuring frame 3 at a proper position of the test section in a sliding manner, adjusting the length and height of a main body frame structure according to the size of an indoor test water tank 2, adjusting the length of the frame to enable the measuring frame 3 to stretch over the glass water tank, adjusting the height of the frame to enable a high-speed camera 404 to be opposite to a measuring area, sequentially installing and fixing a laser platform auxiliary device, a laser platform and a water surface light guide platform on the measuring frame 3, then installing a laser 7 on a bracket vertical plate 13 of the laser platform, switching on the power supply of the laser 7, adjusting the range of underwater laser, firstly, moving an optical glass sheet 20 to a position just contacting with the water surface by adjusting a precision hand-operated ball screw 19 external member, observing the width of the underwater laser, and if the range of the underwater laser is smaller (larger), adjusting the precision hand-operated ball screw 19 external member to enable the distance between the optical glass sheet 20 and a probe of the laser 7 to be increased (smaller), adjusting to a proper distance to ensure that the laser range under the water surface meets the test requirement, adjusting the vertical sliding table module 6 to enable the laser 7 and the optical glass sheet 20 to integrally move up and down if the optical glass sheet 20 is not exactly positioned at the water surface, adjusting the transverse sliding table module 5 to enable the laser 7 and the optical glass sheet 20 to transversely move to a proper position in the width direction of the test water tank 2, connecting a power supply of a high-speed camera 404 and connecting the power supply with a computer, adjusting a stainless steel alumina lifting table 402 to enable the height of the high-speed camera 404 to be proper, covering the whole water flow area, adjusting an imaging plane of the camera to enable the imaging plane of the camera to coincide with a laser plane, and facilitating shooting and capturing a water flow structure; and then assembling and building a computer and an image acquisition system, after the hardware system and the software system are successively built, slowly adding tracer particle diluent into water to obtain a particle image under laser, and calculating to obtain a two-dimensional flow velocity field according to a PIV flow field calculation program for analyzing the structural characteristics and the turbulent fluctuation characteristics of the water flow.
The foregoing shows and describes the general principles, principal features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a surface of water leaded light device and current surveying system suitable for indoor basin is experimental, includes base frame (1), its characterized in that: the outer surface of the upper end of the base platform (1) is provided with a test water tank (2), the outer surface of the upper end of the test water tank (2) is provided with a big frame bottom plate (8), the outer surfaces of the two sides of the big frame bottom plate (8) are provided with measuring frames (3), the outer surface of the upper end of the measuring frames (3) is provided with a laser (7), the outer surface of one end of the laser (7) is provided with a bracket vertical plate (13), the outer surface of one end of the bracket vertical plate (13) is provided with a transverse sliding table module (5) and a vertical sliding table module (6), the transverse sliding table module (5) is positioned on one side of the vertical sliding table module (6), the outer surface of the other end of the bracket vertical plate (13) is provided with a bracket flat plate (14), a bracket reinforcing plate (14) is arranged between the bracket vertical plate (13) and the bracket flat plate (15), the middle part of the measuring frames (3) is provided with a camera platform (4), the camera platform (4) comprises a lifting base (401), an alumina lifting table (402), an alumina lifting table top (403) and a high-speed camera (404), the alumina lifting table (402) is positioned on the outer surface of the upper end of the lifting base (401), the high-speed camera (404) is positioned on the outer surface of the upper end of the alumina lifting table top (403), the outer surface of the upper end of the large frame bottom plate (8) is provided with a 50-shaped material (9), the outer surface of the upper end of the 50-shaped material (9) is provided with a base (10), the outer surface of the upper end of the base (10) is provided with a vertical plate (12), a reinforcing plate (11) is arranged between the base (10) and the vertical plate (12), the outer surface of the lower end of the large frame bottom plate (8) is provided with a stainless steel wheel (16), and the outer surface of the lower end of the bracket flat plate (15) is provided with an ironing rod (18) and a ball screw (19), the galvanized and ironed rod (18) is located on two sides of a ball screw (19), an optical glass sheet (20) is arranged on the outer surface of one end of the ball screw (19), and a large frame bottom plate reinforcing strip (17) is arranged on the outer surface of one end of the large frame bottom plate (8).
2. The water surface light guide device and flow measurement system suitable for the indoor water tank test as claimed in claim 1, wherein: the outer surface of the upper end of the base platform (1) is detachably connected with the outer surface of the lower end of the test water tank (2), and the outer surface of the lower end of the large frame bottom plate (8) is movably connected with the outer surface of the upper end of the test water tank (2) through a stainless steel wheel (16).
3. The water surface light guide device and flow measurement system suitable for the indoor water tank test as claimed in claim 1, wherein: the outer surfaces of the two sides of the big frame bottom plate (8) are detachably connected with the outer surface of one end of the measuring frame (3), and the inner surface of one end of the measuring frame (3) is detachably connected with the outer surface of one end of the camera platform (4).
4. The water surface light guide device and flow measurement system suitable for the indoor water tank test as claimed in claim 1, wherein: the outer surface of the upper end of the lifting base (401) is detachably connected with the outer surface of the lower end of the aluminum oxide lifting table (402), the outer surface of the upper end of the aluminum oxide lifting table (402) is detachably connected with the outer surface of the lower end of the upper table top (403) of the aluminum oxide lifting table, and the outer surface of the upper end of the upper table top (403) of the aluminum oxide lifting table is detachably connected with the outer surface of the lower end of the high-speed camera (404).
5. The water surface light guide device and flow measurement system suitable for the indoor water tank test as claimed in claim 1, wherein: the outer surface of one end of the bracket vertical plate (13) is detachably connected with the outer surface of one end of the transverse sliding table module (5), the outer surface of the other end of the bracket vertical plate (13) is detachably connected with the outer surface of one end of the bracket flat plate (15), and the bracket vertical plate (13) and the bracket flat plate (15) are detachably connected with the bracket reinforcing plate (14).
6. The water surface light guide device and flow measurement system suitable for the indoor water tank test as claimed in claim 1, wherein: the outer surface of the lower end of the bracket flat plate (15) is detachably connected with the outer surface of one end of the plating cauterizing rod (18), the outer surface of the lower end of the bracket flat plate (15) is detachably connected with the outer surface of one end of the ball screw (19), the plating cauterizing rods (18) are divided into two groups, and a glass platform is arranged between the ball screw (19) and the optical glass sheet (20).
7. The water surface light guide device and flow measurement system suitable for the indoor water tank test as claimed in claim 1, wherein: the outer surface of the upper end of the large frame bottom plate (8) is detachably connected with the outer surface of the lower end of the 50 section bar (9), and the outer surface of the upper end of the 50 section bar (9) is detachably connected with the outer surface of the lower end of the base (10).
8. The water surface light guide device and flow measurement system suitable for the indoor water tank test as claimed in claim 1, wherein: the outer surface of the upper end of the base (10) is detachably connected with the outer surface of the lower end of the vertical plate (12), and the base (10) and the vertical plate (12) are detachably connected with the reinforcing plate (11).
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