External integrated PIV (particle image velocimetry) flow field measuring device applicable to multi-body ship

Abstract

An externally-hung integrated PIV flow field measuring device suitable for a multi-hull ship comprises a main body device, a transverse adjusting mechanism is fixed to the top face of the main body device, the two ends of the transverse adjusting mechanism are installed on adjacent hull decks of a catamaran in a sliding mode, the bottom of the middle position of the transverse adjusting mechanism is fixed to the main body device through an extension frame, and the extension frame can slide in the width direction of the hull. The main body device is arranged in the moon pool space of the adjacent ship body; the main body device structurally comprises a vertically-arranged supporting rapier, a sheet light source is installed in a sealed space in the supporting rapier, and a cable penetrates out of a notch in the top of the supporting rapier; a sheet light steering cylinder is arranged at the bottom of the supporting rapier, camera cylinders are symmetrically arranged at the two ends of the sheet light steering cylinder, camera assemblies are installed in sealed spaces in the camera cylinders, and view field steering cylinders and downstream caps are sequentially installed outside the camera cylinders. After being installed and calibrated in a laboratory environment, the device is directly hung on a real ship for measurement, so that the real ship propeller flow field measurement efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of propeller flow field measurement equipment, and in particular to an integrated PIV flow field measurement device suitable for hanging outside a multi-hull ship. Background Art

[0002] The propeller cavitation performance is an issue that needs to be considered in the design of ship comfort and safety, and it is also the main factor that determines the ship's noise performance. The propeller inlet flow field is one of the main factors affecting the propeller cavitation performance.

[0003] Usually, the prediction and evaluation of ship propulsion cavitation performance is carried out through model tests, but due to the influence of size effect, the prediction is inevitably biased. In recent years, the real-scale numerical prediction method has gradually been applied, but the lack of test methods and experimental data for the real-scale ship flow field has led to the lack of refined verification data for model test prediction and real-scale numerical simulation, which has restricted the development of scale effect research and real-scale numerical prediction.

[0004] In the prior art, the actual ship flow field test methods mainly include the Pitot ball, laser Doppler velocimetry (LDV) and particle image velocimetry (PIV). Due to the advantages of simple testing mechanism and small interference to the flow in the test area, PIV testing technology has become the mainstream direction of actual ship flow field measurement technology. At present, the actual ship propeller PIV flow field measurement device basically adopts a distributed arrangement, that is, the camera and light source are dispersedly arranged in the cabin or outside the cabin. It needs to be installed on the actual ship before the light and camera field of view can be adjusted and calibrated. The operation process is complicated, and the requirements for on-site installation conditions and professional knowledge level of personnel are high. The measurement position is fixed and the versatility is not strong. For multi-hull ships, since the hulls on both sides of the stern are mostly slender structures, directly welding and fixing the measurement device on the outside of the hull will have a greater interference with the propeller flow field. Summary of the invention

[0005] In view of the shortcomings in the above-mentioned existing production technology, the applicant provides an integrated PIV flow field measurement device suitable for external mounting on multi-hull ships, which can be conveniently installed and calibrated in a laboratory environment and then directly mounted on a real ship for measurement, thereby improving the efficiency of real ship propeller flow field measurement.

[0006] The technical solution adopted by the present invention is as follows:

[0007] An integrated PIV flow field measurement device suitable for multi-hull ship external mounting includes a main body device, a lateral adjustment mechanism is fixed on the top surface of the main body device, two ends of the lateral adjustment mechanism are respectively installed on the deck of the adjacent hull of the catamaran through a first axial slide and a second axial slide, the bottom of the middle position of the lateral adjustment mechanism is fixed to the main body device through an extension frame, the extension frame can slide in the width direction of the hull, and the main body device is arranged in the moon pool space of the adjacent hull;

[0008] The structure of the main device is as follows: it includes a vertically arranged supporting rapier, which is fixed to the bottom of the extension frame, a sheet light source is installed in the sealed space inside the supporting rapier, and the cable passes through the slot on the top of the supporting rapier; a sheet light steering cylinder is arranged at the bottom of the supporting rapier, camera cylinders are symmetrically arranged at both ends of the sheet light steering cylinder, a camera assembly is installed in the sealed space inside the camera cylinder, and a field of view steering cylinder and a downstream cap are installed in sequence on the outside of the camera cylinder.

[0009] Its further technical solution is:

[0010] The main body device is in an inverted "T" shape as a whole.

[0011] The top surface of the supporting rapier is provided with a flange fixed to the extension frame, and the flange is located above the water surface.

[0012] The incident light sheet of the light sheet light source is deflected by the light sheet deflection cylinder and then illuminates the flow field measurement area at the bottom of the hull.

[0013] The structure of the sheet light steering cylinder comprises a first base, a steering mirror is installed inside the first base through a pin shaft, and a cover is arranged outside the pin shaft; an optical glass is fixed to the side of the first base through a clamping nut and a rubber pad.

[0014] The structure of the camera barrel is as follows: it includes a camera mounting barrel, the top of the camera mounting barrel is provided with a mounting window for the camera assembly, the bottom of the camera mounting barrel is provided with a mounting platform for the camera assembly, a sealing cover is fixed at the mounting window, and a shell clamp is installed on the shell of the camera mounting barrel.

[0015] The shell clamp is a Hough structure.

[0016] The structure of the field of view steering cylinder is as follows: it includes a connecting section, sealing gaskets are arranged on both sides of the glass cover plate and are pressed on the connecting section by locking nuts, the connecting section is fixedly connected to the light-transmitting cylinder, the outer cover clamp is clamped in the groove of the light-transmitting cylinder, the reflector is fixed to the light-transmitting cylinder through the second base, the image of the flow field measurement area is reflected by the reflector and received by the camera assembly, and the observation window is bonded to the outside of the light-transmitting cylinder.

[0017] The structure of the lateral adjustment mechanism is as follows: it includes a mounting frame, a guide rail slider is symmetrically arranged on the bottom surface of the mounting frame, a slide groove is symmetrically arranged on the side of the mounting frame, an extension frame is installed on the bottom surface of the guide rail slider, the ball screw is fixed to the bottom of the mounting frame through its own supporting bearing, and the screw nut is fixed to the top surface of the extension frame. It also includes a fixing plate, one end of the fixing plate is fixed to the extension frame, and the other end is fixed in the slide groove. The slide groove is processed with a full-length T-shaped slot to facilitate locking and fixing of the extension frame at different lateral positions.

[0018] The first axial slide and the second axial slide have the same structure. The structure of the first axial slide includes a bottom plate, a guide rail is fixed on the bottom plate, a slider is mounted on the guide rail, and an adapter plate is fixedly connected to the slider.

[0019] The beneficial effects of the present invention are as follows:

[0020] The present invention has a compact and reasonable structure and is easy to operate. Through the uniquely designed main device, lateral adjustment mechanism, first axial slide and second axial slide, the main device is installed on the lateral adjustment mechanism extension frame and arranged in the moon pool space of adjacent hulls of the catamaran. The lateral adjustment mechanism is fixed on the deck of the adjacent hull of the catamaran through the first axial slide and the second axial slide. By integrating the sheet light source and the camera assembly into the main device, it can be directly hung on the actual ship for measurement after installation and calibration in a laboratory environment, thereby improving the efficiency of the flow field measurement of the actual ship propeller.

[0021] At the same time, the present invention also has the following advantages:

[0022] 1. The light source and camera components are integrated into the main device. After installation and calibration in a laboratory environment, it can be directly mounted on a real ship for measurement. The operation is simple and the efficiency of the propeller flow field measurement on the real ship is improved.

[0023] 2. The flow field measurement area can be adjusted along the axial direction (the length direction of the ship) and the transverse direction (the width direction of the ship), with strong versatility.

[0024] 3. The underwater part of the measuring device is a smooth structure and is suspended in the moon pool of the adjacent hull of the catamaran, which has little interference with the propeller flow field measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall arrangement of the present invention.

[0026] Figure 2 It is a structural schematic diagram of the main device of the present invention.

[0027] Figure 3 It is a structural schematic diagram of the sheet light deflection cylinder of the present invention.

[0028] Figure 4 It is a structural schematic diagram of the camera barrel of the present invention.

[0029] Figure 5 It is a structural schematic diagram of the field of view steering cylinder of the present invention.

[0030] Figure 6 It is a structural schematic diagram of the lateral adjustment mechanism of the present invention.

[0031] Figure 7 It is a structural schematic diagram of the first axial slide of the present invention.

[0032] Wherein: 1. Main device; 2. Transverse adjustment mechanism; 3. First axial slide; 4. Second axial slide;

[0033] 101, supporting rapier; 102, sheet light source; 103, sheet light steering cylinder; 104, camera cylinder; 105, camera assembly; 106, field steering cylinder; 107, downstream cap;

[0034] 1031, first base; 1032, compression nut; 1033, optical glass; 1034, rubber pad; 1035, steering mirror; 1036, pin shaft; 1037, cover; 1038, first sealing ring; 1039, second sealing ring;

[0035] 1041, camera mounting tube; 1042, sealing cover plate; 1043, third sealing ring; 1044, fourth sealing ring; 1045, housing clamp;

[0036] 10601, connecting section; 10602, locking nut; 10603, glass cover; 10604, sealing gasket; 10605, fifth sealing ring; 10606, outer cover clamp; 10607, observation window; 10608, light-transmitting tube; 10609, reflector; 10610, second base; 10611, sixth sealing ring;

[0037] 21. Mounting frame; 22. Ball screw; 23. Guide rail slider; 24. Extension frame; 25. Slideway; 26. Fixing plate;

[0038] 31. Bottom plate; 32. Guide rail; 33. Slider; 34. Adapter plate. DETAILED DESCRIPTION

[0039] The specific implementation of the present invention is described below in conjunction with the accompanying drawings.

[0040] like Figure 1-Figure 7As shown, the present embodiment is suitable for a multi-hull ship external integrated PIV flow field measurement device, comprising a main device 1, a lateral adjustment mechanism 2 is fixed on the top surface of the main device 1, and both ends of the lateral adjustment mechanism 2 are respectively installed on the deck of the adjacent hull of the catamaran through a first axial slide 3 and a second axial slide 4, and the bottom of the middle position of the lateral adjustment mechanism 2 is fixed to the main device 1 through an extension frame 24, and the extension frame 24 can slide in the width direction of the hull, and the main device 1 is arranged in the moon pool space of the adjacent hull;

[0041] The structure of the main device 1 is as follows: it includes a vertically arranged supporting rapier 101, the supporting rapier 101 is fixed to the bottom of the extension frame 24, a sheet light source 102 is installed in the sealed space inside the supporting rapier 101, and the cable passes through the slot at the top of the supporting rapier 101; a sheet light steering cylinder 103 is arranged at the bottom of the supporting rapier 101, camera cylinders 104 are symmetrically arranged at both ends of the sheet light steering cylinder 103, a camera assembly 105 is installed in the sealed space inside the camera cylinder 104, and a field of view steering cylinder 106 and a downstream cap 107 are installed in sequence on the outside of the camera cylinder 104.

[0042] The main device 1 is an inverted "T"-shaped structure as a whole.

[0043] The top surface of the supporting rapier 101 is provided with a flange fixed to the extension frame 24, and the flange is located above the water surface.

[0044] The incident light sheet of the light sheet 102 is deflected by the light sheet deflection tube 103 to illuminate the flow field measurement area at the bottom of the hull.

[0045] The structure of the sheet light redirecting cylinder 103 is as follows: it includes a first base 1031 , inside of which a redirecting mirror 1035 is mounted via a pin 1036 , and outside of the pin 1036 a cover 1037 is provided; an optical glass 1033 is fixed to the side of the first base 1031 via a clamping nut 1032 and a rubber pad 1034 .

[0046] The structure of the camera barrel 104 is as follows: it includes a camera mounting barrel 1041, the top of the camera mounting barrel 1041 is provided with an installation window for the camera assembly 105, the bottom of the camera mounting barrel 1041 is provided with a mounting platform for the camera assembly 105, a sealing cover plate 1042 is fixed at the installation window, and a shell clamp 1045 is installed on the shell of the camera mounting barrel 1041.

[0047] The shell clamp 1045 is a Hough structure.

[0048] The structure of the field of view steering cylinder 106 is as follows: it includes a connecting section 10601, sealing gaskets 10604 are arranged on both sides of the glass cover plate 10603, and are pressed on the connecting section 10601 through locking nuts 10602, the connecting section 10601 is fixedly connected to the light-transmitting cylinder 10608, the outer cover clamp 10606 is clamped in the groove of the light-transmitting cylinder 10608, the reflector 10609 is fixed to the light-transmitting cylinder 10608 through the second base 10610, the image of the flow field measurement area is reflected by the reflector 10609 and then received by the camera assembly 105, and the observation window 10607 is bonded to the outside of the light-transmitting cylinder 10608.

[0049] The structure of the lateral adjustment mechanism 2 is as follows: it includes a mounting frame 21, a guide rail slider 23 is symmetrically arranged on the bottom surface of the mounting frame 21, a slide groove 25 is symmetrically arranged on the side of the mounting frame 21, an extension frame 24 is installed on the bottom surface of the guide rail slider 23, the ball screw 22 is fixed to the bottom of the mounting frame 21 through its own supporting bearing, and the screw nut is fixed to the top surface of the extension frame 24, and also includes a fixing plate 26, one end of the fixing plate 26 is fixed on the extension frame 24, and the other end is fixed in the slide groove 25, and the slide groove 25 is processed with a full-length T-shaped notch to facilitate the locking and fixing of the extension frame 24 at different lateral positions.

[0050] The first axial slide 3 and the second axial slide 4 have the same structure. The first axial slide 3 comprises a bottom plate 31 , a guide rail 32 is fixed on the bottom plate 31 , a slider 33 is mounted on the guide rail 32 , and an adapter plate 34 is fixedly connected to the slider 33 .

[0051] The specific structure and function of the integrated PIV flow field measurement device suitable for multi-hull ship external mounting described in the present invention are as follows:

[0052] like Figure 1 As shown, it mainly includes: a main device 1, a lateral adjustment mechanism 2, a first axial slide 3 and a second axial slide 4.

[0053] The main device 1 is installed on an extension frame 24 of the transverse adjustment mechanism 2, and is arranged in the moon pool space of adjacent hulls of the catamaran. The extension frame 24 can slide in the width direction of the hull.

[0054] The transverse adjustment mechanism 2 is fixed on the adjacent hull decks of the catamaran through the first axial slide 3 and the second axial slide 4. Through this connection mode, the main device 1 can be adjusted arbitrarily in the length direction and width direction of the hull, thereby realizing the adjustment of the measurement test area.

[0055] like Figure 2 As shown, the main device 1 mainly includes a supporting rapier 101, a light sheet 102, a light sheet steering cylinder 103, two sets of camera cylinders 104, two sets of camera assemblies 105, two sets of field of view steering cylinders 106 and two sets of downstream caps 107.

[0056] The sheet light source 102 is vertically installed in the sealed space inside the supporting rapier 101 , and the cable passes through the slot at the top of the supporting rapier 101 .

[0057] The top flange of the supporting rapier 101 is above the water surface, and the bottom is fixedly connected to the sheet light deflection cylinder 103 and is sealed by a second sealing ring 1039 .

[0058] The incident light sheet of the light sheet 102 is deflected by the light sheet deflection tube 103 to illuminate the flow field measurement area at the bottom of the hull.

[0059] A camera assembly 105 is installed in the sealed space inside the camera barrel 104, one end of which is fixed to the sheet light steering barrel 103, and the other end is fixed to the field of view steering barrel 106. The lens of the camera assembly 105 faces the field of view steering barrel 106, and after steering, the flow field measurement area can be photographed through the observation window 10607.

[0060] The downstream cap 107 is fixed on the field of view steering cylinder 106 .

[0061] like Figure 3 As shown, the sheet light redirecting cylinder 103 mainly includes a first base 1031 , a compression nut 1032 , an optical glass 1033 , a rubber pad 1034 , a redirecting mirror 1035 , a pin 1036 , a cover 1037 , a first sealing ring 1038 , and a second sealing ring 1039 .

[0062] The steering mirror 1035 equipped with a pin shaft 1036 is fixed inside the first base 1031, and a first sealing ring 1038 is provided on the mounting surface.

[0063] Rubber pads 1034 are provided on both sides of the optical glass 1033 and are fixed to the sides of the first base 1031 through compression nuts 1032 .

[0064] The normal line of the optical glass 1033 is parallel to the optical axis of the light center of the reflector.

[0065] The cover 1037 is fixed on the pin 1036 .

[0066] The second sealing ring 1039 is disposed in a top planar groove of the first base 1031 .

[0067] like Figure 4 As shown, the camera barrel 104 mainly includes a camera mounting barrel 1041 , a sealing cover plate 1042 , a third sealing ring 1043 , a fourth sealing ring 1044 and a housing clamp 1045 .

[0068] The top of the camera mounting tube 1041 is provided with an installation window for the camera assembly 105 , and the bottom is provided with an installation platform for the camera assembly 105 .

[0069] The sealing cover plate 1042 is fixed in the mounting window at the top of the camera mounting tube 1041 , and a third sealing ring 1043 is provided on the mounting surface.

[0070] The fourth sealing ring 1044 is installed in the grooves at both ends of the camera mounting tube 1041. The outer shell clamp 1045 is a half structure, which is tightly clamped on the outer shell of the camera mounting tube 1041 to ensure the smoothness of the flow surface.

[0071] like Figure 5 As shown, the field of view steering cylinder 106 mainly includes a connecting section 10601, a locking nut 10602, a glass cover 10603, a sealing gasket 10604, a fifth sealing ring 10605, an outer cover clamp 10606, an observation window 10607, a light-transmitting cylinder 10608, a reflector 10609, a second base 10610 and a sixth sealing ring 10611.

[0072] Among them, sealing gaskets 10604 are arranged on both sides of the glass cover plate 10603 and are pressed onto the connecting section 10601 through locking nuts 10602.

[0073] The connecting section 10601 is fixedly connected to the light-transmitting tube 10608, and a fifth sealing ring 10605 is provided on the connecting surface.

[0074] Among them, the outer cover clamp 10606 is a half structure, which is tightly clamped in the groove of the light-transmitting tube 10608.

[0075] The reflector 10609 is fixed inside the light-transmitting tube 10608 via a second base 10610 .

[0076] The image of the flow field measurement area is reflected by the reflector 10609 and then received by the camera assembly 105 .

[0077] Among them, a sixth sealing ring 10611 is provided on the contact surface between the second base 10610 and the light-transmitting tube 10608 .

[0078] Among them, the observation window 10607 is bonded to the outside of the light-transmitting tube 10608.

[0079] The internal space of the field of view steering cylinder 106 is filled with water, so as to ensure that the camera assembly 105 can clearly capture the particle image in the flow field measurement area.

[0080] like Figure 6 As shown, the lateral adjustment mechanism 2 mainly includes a mounting frame 21 , a ball screw 22 , a guide rail slider 23 , an extension frame 24 , a slide groove 25 and a fixing plate 26 .

[0081] The bottom surface of the mounting frame 21 is symmetrically provided with guide rail sliders 23 , and the side surface is symmetrically provided with slide grooves 25 .

[0082] The extension frame 24 is fixed on the guide rail slider 23 .

[0083] The ball screw 22 is fixed to the bottom of the mounting frame 21 through its own supporting bearing, and the screw nut is fixed to the extension frame 24. The ball screw 22 can drive the extension frame 24 to adjust its position in the lateral direction of the hull.

[0084] One end of the fixing plate 26 is fixed on the extension frame 24 , and the other end is fixed in the sliding groove 25 .

[0085] The slide groove 25 is processed with a full-length T-shaped notch to facilitate locking and fixing the extension frame 24 at different lateral positions.

[0086] like Figure 7 As shown, the first axial slide 3 mainly includes a base plate 31 , a guide rail 32 , a slider 33 and an adapter plate 34 .

[0087] The guide rail 32 is fixed on the bottom plate 31 , and the slider 33 is installed on the guide rail 32 .

[0088] The adapter plate 34 is fixedly connected to the slider 33 and can be adjusted in position along the axial direction of the hull.

[0089] A full-length T-shaped slot is processed on the bottom plate 31 , and after the position of the adapter plate 34 is adjusted into place, it is fixed to the T-shaped slot of the bottom plate 31 by T-shaped screws.

[0090] In the actual working process, the main device 1, the transverse adjustment mechanism 2, the first axial slide 3 and the second axial slide 4, the main device 1 is installed on the extension frame 24 of the transverse adjustment mechanism 2, and is arranged in the moon pool space of the adjacent hulls of the catamaran. The transverse adjustment mechanism 2 is fixed on the deck of the adjacent hull of the catamaran through the first axial slide 3 and the second axial slide 4. By integrating the light source 102 and the camera assembly 105 into the main device 1, it can be directly mounted on the actual ship for measurement after installation and calibration in a laboratory environment, thereby improving the efficiency of the flow field measurement of the actual ship thruster.

[0091] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. An integrated PIV flow field measurement device suitable for multi-hull ship external mounting, characterized in that: The invention comprises a main body device (1), a transverse adjustment mechanism (2) is fixed on the top surface of the main body device (1), two ends of the transverse adjustment mechanism (2) are respectively installed on the decks of adjacent hulls of the catamaran through a first axial slide (3) and a second axial slide (4), the bottom of the middle position of the transverse adjustment mechanism (2) is fixed to the main body device (1) through an extension frame (24), the extension frame (24) can slide in the width direction of the hull, and the main body device (1) is arranged in the moon pool space of the adjacent hull; The structure of the main device (1) is as follows: it comprises a vertically arranged supporting rapier (101), the supporting rapier (101) is fixed at the bottom of an extension frame (24), a sheet light source (102) is installed in a sealed space inside the supporting rapier (101), and a cable passes through a notch at the top of the supporting rapier (101); a sheet light steering cylinder (103) is arranged at the bottom of the supporting rapier (101), camera cylinders (104) are symmetrically arranged at both ends of the sheet light steering cylinder (103), a camera assembly (105) is installed in the sealed space inside the camera cylinder (104), and a field of view steering cylinder (106) and a downstream cap (107) are sequentially installed outside the camera cylinder (104).

2. The integrated PIV flow field measurement device suitable for hanging on a multi-hull ship as claimed in claim 1, characterized in that: The main body device (1) is in an inverted "T"-shaped structure as a whole.

3. The integrated PIV flow field measurement device suitable for hanging on a multi-hull ship as claimed in claim 1, characterized in that: The top surface of the supporting rapier (101) is provided with a flange fixed to the extension frame (24), and the flange is located above the water surface.

4. The integrated PIV flow field measurement device suitable for hanging on a multi-hull ship as claimed in claim 1, characterized in that: The incident sheet light of the sheet light source (102) is deflected by the sheet light deflection cylinder (103) to illuminate the flow field measurement area at the bottom of the hull.

5. The integrated PIV flow field measurement device suitable for hanging on a multi-hull ship as claimed in claim 1, characterized in that: The structure of the sheet light redirection cylinder (103) is as follows: it comprises a first base (1031), a redirection mirror (1035) is installed inside the first base (1031) via a pin shaft (1036), and a cover (1037) is arranged outside the pin shaft (1036); an optical glass (1033) is fixed to the side of the first base (1031) via a clamping nut (1032) and a rubber pad (1034).

6. The integrated PIV flow field measurement device suitable for hanging on a multi-hull ship as claimed in claim 1, characterized in that: The structure of the camera barrel (104) is as follows: it comprises a camera installation barrel (1041), the top of the camera installation barrel (1041) is provided with an installation window for the camera assembly (105), the bottom of the camera installation barrel (1041) is provided with an installation platform for the camera assembly (105), a sealing cover plate (1042) is fixed at the installation window, and a shell clamp (1045) is installed on the shell of the camera installation barrel (1041).

7. The integrated PIV flow field measurement device suitable for hanging on a multi-hull ship as claimed in claim 6, characterized in that: The shell clamp (1045) is a Hough structure.

8. The integrated PIV flow field measurement device suitable for hanging on a multi-hull ship as claimed in claim 1, characterized in that: The structure of the field of view steering cylinder (106) is as follows: it comprises a connecting section (10601), sealing gaskets (10604) are arranged on both sides of the glass cover plate (10603) and are pressed against the connecting section (10601) by locking nuts (10602), the connecting section (10601) is fixedly connected to the light-transmitting cylinder (10608), the outer cover clamp (10606) is clamped in the groove of the light-transmitting cylinder (10608), the reflector (10609) is fixed to the light-transmitting cylinder (10608) through the second base (10610), the image of the flow field measurement area is reflected by the reflector (10609) and then received by the camera assembly (105), and the observation window (10607) is bonded to the outside of the light-transmitting cylinder (10608).

9. The integrated PIV flow field measurement device suitable for hanging on a multi-hull ship as claimed in claim 1, characterized in that: The structure of the lateral adjustment mechanism (2) is as follows: it comprises a mounting frame (21), a guide rail slider (23) is symmetrically arranged on the bottom surface of the mounting frame (21), a slide groove (25) is symmetrically arranged on the side surface of the mounting frame (21), an extension frame (24) is mounted on the bottom surface of the guide rail slider (23), a ball screw (22) is fixed to the bottom of the mounting frame (21) through its own supporting bearing, a screw nut is fixed to the top surface of the extension frame (24), and also comprises a fixing plate (26), one end of the fixing plate (26) is fixed to the extension frame (24), and the other end is fixed in the slide groove (25), and a through-length T-shaped notch is processed on the slide groove (25) to facilitate locking and fixing the extension frame (24) at different lateral positions.

10. The integrated PIV flow field measurement device suitable for hanging on a multi-hull ship as claimed in claim 1, characterized in that: The first axial slide (3) and the second axial slide (4) have the same structure. The structure of the first axial slide (3) is as follows: it comprises a base plate (31), a guide rail (32) is fixed on the base plate (31), a slider (33) is mounted on the guide rail (32), and an adapter plate (34) is fixedly connected to the slider (33).

Images