Particle image velocity measurement device and method based on binocular vision

Abstract

The invention discloses a binocular vision-based particle image velocity measurement device and method, the binocular vision-based particle image velocity measurement device comprises a casing and an adjusting mechanism, the front surface of the casing is fixedly connected with an industrial personal computer, and the bottom surface of the casing is fixedly connected with two U-shaped plates. Through cooperative operation of the laser emitter, the pulse controller, the particle generator and the high-speed camera, internal shooting of a flow field is achieved, flow field characteristics are accurately captured, displacement of a square rod with a hole can be accurately regulated and controlled by means of mutual cooperation of a servo motor and a threaded rod, and then the high-speed camera is pushed to flexibly adjust the shooting angle; therefore, the two high-speed cameras can shoot the flow field from different visual angles, the accuracy of particle image acquisition is greatly improved, the accuracy of flow velocity measurement is further remarkably improved, and more reliable data support is provided for related research and application.

Description

Technical Field

[0001] The present invention relates to the technical field of particle image velocimetry, and in particular to a particle image velocimetry device and method based on binocular vision. Background Art

[0002] Particle image velocimetry is an optical measurement technology used in fluid mechanics research. It is widely used in fields such as fluid flow, air flow, liquid flow, and combustion processes. It calculates the velocity distribution of the fluid at various locations by capturing images of the flow field with tiny particles.

[0003] At present, particle image velocimetry devices are needed to measure the velocity of the flow field under test. Although the current velocimetry devices can measure the velocity, they still have some shortcomings. For example, the velocity of the flow field is generally shot by a single high-speed camera, resulting in a single shooting angle when measuring the velocity of the flow field, so that the particle image acquisition is relatively one-sided, affecting the accuracy of the velocity measurement.

[0004] Based on this, the present invention designs a particle image velocimetry device and method based on binocular vision to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a binocular vision-based particle image velocimetry device and method to address the aforementioned background art problem of single-angle shooting angles when measuring flow field velocity, resulting in relatively one-sided particle image acquisition. This device can accurately capture flow field characteristics. By leveraging the interaction between a servo motor and a threaded rod, the displacement of a perforated square rod can be precisely controlled, thereby driving the high-speed camera to flexibly adjust the shooting angle. This allows two high-speed cameras to capture the flow field from different perspectives, significantly improving the accuracy of particle image acquisition and, consequently, the accuracy of flow velocity measurement, providing more reliable data support for related research and applications.

[0006] The technical solution for achieving the purpose of the present invention is:

[0007] A particle image velocimetry device and method based on binocular vision, comprising a stacked housing and an adjustment mechanism, wherein an industrial control computer is provided on the front of the housing, two U-shaped plates with U-shaped openings facing the bottom of the housing are provided at intervals on the bottom of the housing, a servo motor is provided on the bottom of each U-shaped plate, and a threaded rod is provided at the output end of each servo motor. The adjustment mechanism is arranged above the housing, and the adjustment mechanism includes a flow field mounted on the upper surface of the housing, a laser emitter and a pulse controller are fixedly connected to the upper surface of the flow field in sequence from bottom to top, and a particle generator is provided on the back of the flow field. Two support rods are passed through the inner wall of the housing, each of the support rods is rotatably connected to a control plate with a hole, and the upper surface of each control plate with a hole is provided with a high-speed camera. Two square tubes are inlaid on the inner bottom wall of the housing, and the inner wall of each square tube is slidably connected to a square rod with a hole. The top ends of the two threaded rods extend into the interiors of the two square rods with holes, and the two threaded rods are respectively threadedly connected to the two square rods with holes. The industrial control computer is connected to the high-speed camera.

[0008] Preferably, both the left and right side surfaces of the housing are provided with fixing seats, and the upper surface of each fixing seat is fixedly connected to the bottom surface of the flow field.

[0009] Preferably, the outer wall of each support rod is sleeved with two limiting rings, and each perforated control plate is located between the two limiting rings at corresponding positions.

[0010] Preferably, a gyroscope is provided on the bottom surface of each of the control panels with holes, and two indicator lights connected to the industrial computer are provided on the front surface of the housing.

[0011] Preferably, the two facing control plates with holes are provided with protective plates, the sides of the two protective plates that are away from each other are in contact with the sides of the two high-speed cameras that are close to each other, and the two protective plates are in contact with the two square rods with holes at corresponding positions.

[0012] Preferably, a partition is provided on the inner wall of the casing, and tension springs are provided on both the left and right sides of the partition, and ends of the two tension springs that are away from each other are fixedly connected to the sides of the two protective plates that are close to each other.

[0013] Preferably, two brackets are provided below the housing, the upper surface of each bracket is fixedly connected to the bottom surface of the housing, and the two U-shaped plates are located between the two brackets.

[0014] The bottom surface of the flow field is provided with square holes for high-speed cameras to take particle images.

[0015] The output end of the particle generator is communicated with the flow field cavity.

[0016] Compared with the existing technology, the beneficial effects of the present invention are: through the coordinated operation of the laser emitter, pulse controller, particle generator and high-speed camera, internal flow field shooting can be realized, and the flow field characteristics can be accurately captured. With the help of the mutual cooperation of the servo motor and the threaded rod, the displacement of the square rod with holes can be accurately controlled, thereby promoting the high-speed camera to flexibly adjust the shooting angle, so that the two high-speed cameras can shoot the flow field from different perspectives, greatly improving the accuracy of particle image acquisition, and thus significantly improving the accuracy of flow velocity measurement, providing more reliable data support for related research and applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the side view of the present invention;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the front cross-section of the present invention;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the side sectional view of the present invention.

[0021] In the figure, 1. Casing; 101. Industrial computer; 102. Bracket; 103. Indicator light; 2. Adjustment mechanism; 201. Flow field; 202. Laser emitter; 203. Pulse controller; 204. Particle generator; 205. Partition; 206. Support rod; 207. Control board with holes; 208. High-speed camera; 209. Protection plate; 210. Square rod with holes; 211. Tension spring; 3. Fixing seat; 4. U-shaped plate; 5. Servo motor; 501. Threaded rod; 6. Square tube; 7. Limiting ring; 8. Gyroscope. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] Example:

[0024] See also Figures 1 to 4A particle image velocimetry device and method based on binocular vision comprises a stacked housing 1 and an adjustment mechanism 2. An industrial computer 101 is provided on the front of the housing 1. Two U-shaped plates 4 with U-shaped openings facing the bottom of the housing 1 are provided at intervals on the bottom of the housing 1. A servo motor 5 is provided on the bottom of each U-shaped plate 4. A threaded rod 501 is provided at the output end of each servo motor 5. The adjustment mechanism 2 is arranged above the housing 1. The adjustment mechanism 2 comprises a flow field 201 mounted on the upper surface of the housing 1. A laser emitter 202 and a pulse controller 203 are fixedly connected to the upper surface of the flow field 201 in sequence from bottom to top. A particle generator 204 is provided on the back of the field 201, and two support rods 206 are connected to the inner wall of the casing 1. A control plate 207 with a hole is rotatably connected to the top of each support rod 206. A high-speed camera 208 is provided on the upper surface of each control plate 207 with a hole. Two square tubes 6 are inlaid on the inner bottom wall of the casing 1 at intervals, and a square rod 210 with a hole is slidably connected to the inner wall of each square tube 6. The top ends of the two threaded rods 501 extend to the interior of the two square rods 210 with holes, and the two threaded rods 501 are respectively threadedly connected to the two square rods 210 with holes, and the industrial computer 101 is electrically connected to the high-speed camera 208.

[0025] like Figure 1 As shown, fixing seats 3 are provided on the left and right sides of the casing 1, and the upper surface of each fixing seat 3 is fixedly connected to the bottom surface of the flow field 201. The fixing seat 3 can reinforce the flow field 201 and increase the stability of the flow field 201.

[0026] like Figure 3 As shown, two limiting rings 7 are sleeved on the outer wall of each support rod 206, and each perforated control plate 207 is located between the two limiting rings 7 at corresponding positions.

[0027] like Figure 3 As shown, a gyroscope 8 is provided on the bottom surface of each perforated control panel 207, and two indicator lights 103 electrically connected to the industrial computer 101 are provided on the front surface of the housing 1. The rotation angle of the high-speed camera 208 can be sensed by the gyroscope 8, so that the staff can accurately control the high-speed camera 208.

[0028] like Figure 3 As shown, the two control plates 207 with holes are provided with protective plates 209 on the opposite sides. The sides of the two protective plates 209 that are away from each other are in contact with the side faces of the two high-speed cameras 208 that are close to each other. The protective plates 209 can protect the high-speed cameras 208 to prevent the surface of the high-speed cameras 208 from being worn. The two protective plates 209 are in contact with the two square rods 210 with holes at corresponding positions.

[0029] like Figure 3As shown, a partition 205 is provided on the inner wall of the casing 1, and tension springs 211 are provided on the left and right sides of the partition 205. The ends of the two tension springs 211 that are away from each other are fixedly connected to the sides of the two protective plates 209 that are close to each other. Through the cooperation of the partition 205 and the tension springs 211, the high-speed camera 208 can be limited to prevent the high-speed camera 208 from swinging.

[0030] like Figure 1 As shown, two brackets 102 are provided under the casing 1, and the upper surface of each bracket 102 is fixedly connected to the bottom surface of the casing 1. The two U-shaped plates 4 are located between the two brackets 102. The brackets 102 can support the device and protect the servo motor 5 to prevent the servo motor 5 from being hit.

[0031] The bottom surface of the flow field 201 is provided with a square hole for a high-speed camera 208 to capture particle images.

[0032] The output end of the particle generator 204 is communicated with the inner cavity of the flow field 201 .

[0033] In this example, when the device is powered on but not working, the indicator light on the left shows red, indicating that it is not working, and the indicator light on the right is off. When the device is powered on and working, the indicator light on the left is off, and the indicator light on the right shows green, indicating that it is working. When the device is powered off, both indicator lights are off. The implementation principle of this embodiment is as follows: when in use, first start the servo motor 5, the servo motor 5 drives the threaded rod 501 to rotate, the threaded rod 501 controls the square rod with holes 210 to move upward, the square rod with holes 210 pushes the protective plate 209 upward, and the protective plate 209 drives the control plate 207 with holes to rotate along the support rod 206 as the axis, thereby adjusting the shooting angle of the high-speed camera 208, and then start the pulse controller 203, the laser emitter 202 and the particle generator 204, so that the particle generator 204 adds particles to the inside of the flow field 201, and then start the high-speed camera 208, so that the high-speed camera 208 takes pictures of the inside of the flow field 201, and uploads the photographed lighting to the industrial computer 101, and the industrial computer 101 saves and analyzes the image.

[0034] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0035] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A particle image velocimetry device and method based on binocular vision, comprising a stacked housing (1) and an adjustment mechanism (2), characterized in that: The front of the housing (1) is provided with an industrial control computer (101), the bottom of the housing (1) is provided with two U-shaped plates (4) with U-shaped openings facing the bottom of the housing (1), the bottom of each U-shaped plate (4) is provided with a servo motor (5), and the output end of each servo motor (5) is provided with a threaded rod (501), the adjustment mechanism (2) is arranged above the housing (1), the adjustment mechanism (2) includes a flow field (201) installed on the upper surface of the housing (1), the upper surface of the flow field (201) is fixedly connected with a laser emitter (202) and a pulse controller (203) in sequence from bottom to top, and a particle generator is provided on the back of the flow field (201). (204), the inner wall of the housing (1) is connected with two support rods (206), each of the support rods (206) is rotatably connected to a control plate with a hole (207), and the upper surface of each control plate with a hole (207) is provided with a high-speed camera (208), the inner bottom wall of the housing (1) is inlaid with two square tubes (6), the inner wall of each square tube (6) is slidably connected to a square rod with a hole (210), the top ends of the two threaded rods (501) extend to the interior of the two square rods with holes (210), the two threaded rods (501) are respectively threadedly connected to the two square rods with holes (210), and the industrial computer (101) is connected to the high-speed camera (208).

2. The device and method for measuring particle image velocimetry based on binocular vision according to claim 1, characterized in that: Fixed seats (3) are provided on both the left and right side surfaces of the casing (1), and the upper surface of each fixed seat (3) is fixedly connected to the bottom surface of the flow field (201).

3. The device and method for measuring particle velocimetry based on binocular vision according to claim 1, characterized in that: Two limiting rings (7) are sleeved on the outer wall of each support rod (206), and each perforated control plate (207) is located between the two limiting rings (7) at corresponding positions.

4. The device and method for measuring particle velocimetry based on binocular vision according to claim 1, characterized in that: The bottom surface of each of the perforated control panels (207) is provided with a gyroscope (8), and the front surface of the housing (1) is provided with two indicator lights (103) connected to the industrial computer (101).

5. The device and method for measuring particle velocimetry based on binocular vision according to claim 1, characterized in that: The two control plates (207) with holes are each provided with a protective plate (209) on the opposite sides thereof. The sides of the two protective plates (209) that are away from each other are in contact with the sides of the two high-speed cameras (208) that are close to each other. The two protective plates (209) are in contact with two square rods (210) with holes at corresponding positions.

6. The device and method for measuring particle image velocimetry based on binocular vision according to claim 5, characterized in that: The inner wall of the housing (1) is provided with a partition (205), and the left and right sides of the partition (205) are both provided with tension springs (211), and the ends of the two tension springs (211) that are away from each other are fixedly connected to the sides of the two protection plates (209) that are close to each other.

7. The device and method for measuring particle velocimetry based on binocular vision according to claim 1, characterized in that: Two brackets (102) are provided below the housing (1), the upper surface of each bracket (102) is fixedly connected to the bottom surface of the housing (1), and the two U-shaped plates (4) are located between the two brackets (102).

8. The device and method for measuring particle velocimetry based on binocular vision according to claim 1, characterized in that: The bottom surface of the flow field (201) is provided with a square hole for a high-speed camera (208) to capture particle images.

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