A flow rate and flow direction sensor detection calibration device

Abstract

The utility model provides a flow rate flow direction sensor detection calibration device relates to detection device technical field to solve the problem of detection calibration device in prior art because of high cost, complex operation, poor portability and insufficient flexibility is not suitable for the measurement of flow rate flow direction sensor in the initial stage of research and development, a flow rate flow direction sensor detection calibration device, including sleeve, connecting pipe and angle adjusting assembly, sleeve is provided with fluid passage along horizontal direction, connecting pipe is connected in the sleeve outer wall, the first through -hole that communicates with fluid passage is established to connecting pipe on along vertical direction, angle adjusting assembly includes first connecting block and placement platform, first connecting block rotationally is located in sleeve and rotation axis vertical setting, the placement platform is located in fluid passage, the wire is worn to first connecting block along vertical direction, the wire upper end exposes above first connecting block and is used for with control system electricity is connected, the wire lower extreme passes through the sleeve and is located in fluid passage and is located above placement platform.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, specifically to a flow velocity and flow direction sensor detection and calibration device. Background Technology

[0002] Gas velocity and direction are crucial parameters indispensable in many fields such as modern industry, environmental monitoring, aerospace, energy management, and biomedicine. Accurately acquiring dynamic gas flow information is of paramount importance for optimizing device fabrication processes, improving energy efficiency, ensuring safe equipment operation, and monitoring environmental pollution and meteorological changes.

[0003] Current flow velocity and direction sensors require rigorous testing and calibration procedures before practical use to ensure that their detection results meet design requirements and function correctly. However, traditional detection and calibration devices, in order to achieve high measurement accuracy, typically rely on high-precision airflow equipment or complex mechanical structures, which have the following drawbacks:

[0004] 1. High cost: Flow velocity and direction sensors require high-precision airflow equipment, such as wind tunnel laboratories, for precise calibration and extrusion. These testing environments need to be strictly controlled and continuously maintained, which significantly increases the research and development cost of sensors.

[0005] 2. Complex operation: It requires professional personnel to debug and calibrate the equipment, which is time-consuming and has high requirements for the operating environment.

[0006] 3. Poor portability: Traditional equipment is bulky and difficult to quickly set up and use outside of the laboratory.

[0007] 4. Insufficient flexibility: Existing devices can usually only be debugged at a fixed angle or in a single flow direction, which cannot meet the needs of rapid calibration under multiple angles and multiple flow rates.

[0008] In the early stages of research and development, in scenarios such as rapid testing on production lines or medical breath screening, it is often only necessary to verify whether the sensor is working properly and test the general range of sensor flow rate, without the need for high-precision data. Therefore, the aforementioned testing and calibration device is not suitable for this type of scenario. Utility Model Content

[0009] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a flow velocity and flow direction sensor detection and calibration device, so as to solve the problems that the existing detection and calibration devices are not suitable for the measurement of flow velocity and flow direction sensors in the early stage of research and development due to high cost, complicated operation, poor portability and insufficient flexibility.

[0010] To solve the above-mentioned technical problems, this utility model provides a flow velocity and flow direction sensor detection and calibration device, comprising:

[0011] A sleeve, with a fluid channel extending horizontally through it;

[0012] A connecting pipe is attached to the outer wall of the sleeve. The connecting pipe has a first through hole in the vertical direction that communicates with the fluid channel, allowing the detection part of the standard flow meter to enter the fluid channel.

[0013] An angle adjustment assembly includes a first connecting block and a placement platform. The first connecting block is rotatably mounted on a sleeve with its rotation axis vertically positioned. The placement platform is located within a fluid channel. A wire is threaded through the first connecting block in a vertical direction. The upper end of the wire protrudes above the first connecting block and is used for electrical connection with the control system. The lower end of the wire passes through the sleeve and is located within the fluid channel and above the placement platform.

[0014] With the above structure, the flow velocity and direction sensor detection and calibration device of this utility model has the following advantages: A PCB board containing the flow velocity and direction sensor chip is placed on a placement platform and connected to wires. A conventional fan is placed at one end of the fluid channel as a fluid source. The detection part of a standard flow meter is inserted into the fluid channel through the first through hole. After the fan is started, the voltage data fed back to the control system by the flow velocity and direction sensor chip is read and compared with the flow velocity detected by the standard flow meter. This allows determination of whether the flow velocity and direction sensor chip is working properly and whether the detection of fluid flow velocity is accurate. By changing the fan speed, the voltage data fed back to the control system by the flow velocity and direction sensor chip can be read. The pressure data is analyzed, and when the voltage data no longer changes significantly, the upper limit of the flow velocity measurement of the flow velocity and direction sensor chip can be obtained. By rotating the first connecting block, the angle of the flow velocity and direction sensor chip is changed, so that the relative angle between the flow velocity and direction sensor chip and the fluid changes. The voltage data fed back by the flow velocity and direction sensor chip is read, realizing the detection and calibration of the fluid flow direction by the flow velocity and direction sensor chip. This utility model can use a traditional fan to replace the traditional air pump, thereby achieving low-cost, active airflow rate control. It is helpful for simple flow velocity range adjustment in the early stage of research and development. Moreover, the overall structure is simple, which can achieve a small size. It is also easy to operate and can achieve rapid calibration of multiple angles and multiple flow velocities.

[0015] As an improvement, the angle adjustment assembly also includes a fixing block, which is located on the outer wall of the sleeve. The fixing block has a second through hole along the vertical direction and the second through hole penetrates the side wall of the sleeve and communicates with the fluid channel. The first connecting block is rotatably connected in the second through hole of the fixing block, and the lower end of the wire is located in the fluid channel through the second through hole.

[0016] As an improvement, the second through hole includes a reduced diameter section and an expanded diameter section located below the reduced diameter section. The diameter of the expanded diameter section is larger than that of the reduced diameter section, and a stepped surface is formed between the expanded diameter section and the reduced diameter section. The placement platform includes a placement plate and several connecting columns. The placement plate is located in the fluid channel, and the upper and lower ends of the connecting columns are connected to the stepped surface and the placement plate, respectively.

[0017] As an improvement, the angle adjustment component also includes a rotating block connected above the first connecting block. The rotating block has a circular cross-section, and the upper surface of the fixed block is provided with an angle mark along the circumference. The outer wall of the rotating block is provided with a pointer pointing to the angle mark. With this structure, the rotation angle can be visually read according to the angle mark indicated by the pointer, which is convenient for precise control of the flow direction and calibration angle.

[0018] As an improvement, a second connecting block is provided on the connecting pipe for connecting to a standard flow meter.

[0019] As an improvement, a rectifier assembly is connected to one end of the sleeve. The rectifier assembly includes a rectifier cylinder connected to one end of the sleeve. A rectifier channel is provided horizontally inside the rectifier cylinder. The rectifier channel is conical and its inner diameter gradually decreases away from the fluid channel. With this structure, the conical rectifier channel can reduce turbulence, concentrate the air blown by the fan, and then guide it, thereby improving the uniformity of airflow in the fluid channel.

[0020] As an improvement, the rectifier assembly also includes a rectifier mesh, which is located between the rectifier cylinder and the sleeve, and has several rectifier holes distributed on it; this structure makes the airflow distribution in the fluid channel more uniform.

[0021] As an improvement, a first flange is provided on the outer wall of the sleeve, and a second flange is provided on the outer wall of the rectifier cylinder. The first flange and the second flange are detachably connected by bolts, and the rectifier mesh is connected between the first flange and the second flange. This structure facilitates the disassembly and cleaning of the rectifier assembly and reduces contamination of the downstream flow velocity and direction sensor chip.

[0022] As an improvement, the cross-section of the fluid channel is circular; this structure improves the uniformity of airflow within the fluid channel.

[0023] As an improvement, a support is connected to the outer wall of the sleeve; this structure allows the sleeve to be placed stably on a flat surface. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a top view of the angle adjustment component in this utility model.

[0026] Figure 3 This is a cross-sectional view of the angle adjustment component in this utility model.

[0027] Figure 4 This is a cross-sectional view of the connecting pipe portion in this utility model.

[0028] Figure 5 This is an exploded structural diagram of the present invention.

[0029] Reference numerals: 1. Sleeve; 2. Fluid channel; 3. Connecting pipe; 4. First through hole; 5. First connecting block; 6. Placement platform; 61. Placement plate; 62. Connecting column; 7. Wire; 8. Fixing block; 9. Second through hole; 91. Reduction section; 92. Expansion section; 10. Stepped surface; 11. Rotating block; 12. Angle indicator; 13. Pointer; 14. Second connecting block; 15. Rectifier cylinder; 16. Rectifier channel; 17. Rectifier mesh; 18. Rectifier hole; 19. First flange; 20. Second flange; 21. Support. Detailed Implementation

[0030] The following is a detailed description of the flow velocity and flow direction sensor detection and calibration device of this utility model with reference to the accompanying drawings.

[0031] like Figures 1 to 5 As shown, a flow velocity and direction sensor detection and calibration device includes a sleeve 1, a connecting pipe 3, and an angle adjustment assembly. The sleeve 1 has a fluid channel 2 extending through it in the horizontal direction. In this embodiment, the cross-section of the fluid channel 2 is circular, and the cross-section of the outer wall of the fluid channel 2 is also circular, so that the overall cross-section of the fluid channel 2 is annular. The sleeve 1 is set horizontally in the axial direction. In order to make the sleeve 1 stably placed on a table or the ground, a bracket 21 is connected to the outer wall of the sleeve 1. Specifically, there are three brackets 21, one on each of the left and right sides of the outer wall of the sleeve 1, and one at the end of the sleeve 1.

[0032] like Figure 1 and Figure 5 As shown, a rectifier assembly is connected to one end of the sleeve 1. The rectifier assembly includes a rectifier cylinder 15, which is connected to one end of the sleeve 1. A rectifier channel 16 is provided through the rectifier cylinder 15 in a horizontal direction. The rectifier channel 16 is conical and its inner diameter gradually decreases away from the fluid channel 2. The shape of the rectifier cylinder 15 matches the shape of the rectifier channel 16, and the outer diameter of the rectifier cylinder 15 gradually decreases away from the fluid channel 2.

[0033] like Figure 5 As shown, the rectifier assembly also includes a rectifier mesh 17, which is disposed between the rectifier cylinder 15 and the sleeve 1. The rectifier mesh 17 has a plurality of rectifier holes 18 distributed on it. Specifically, the outer wall of the sleeve 1 is provided with a first flange 19, and the outer wall of the rectifier cylinder 15 is provided with a second flange 20. The first flange 19 and the second flange 20 are detachably connected by bolts, and the rectifier mesh 17 is connected between the first flange 19 and the second flange 20.

[0034] like Figure 1As shown, the connecting pipe 3 is connected to the outer wall of the sleeve 1. Specifically, the connecting pipe 3 is vertically arranged and its central axis passes through the center of the cross-section of the fluid channel 2. The connecting pipe 3 is provided with a first through hole 4 in the vertical direction, which communicates with the fluid channel 2 and allows the detection part of the standard flow meter to enter the fluid channel 2. The connecting pipe 3 is also provided with a second connecting block 14 for connecting with the standard flow meter. The standard flow meter is connected to the second connecting block 14, and its detection part enters the fluid channel 2 through the first through hole 4. The specific structure of the standard flow meter and its specific connection method with the second connecting block 14 are existing technologies and will not be described in detail here.

[0035] like Figures 1 to 3 As shown, the angle adjustment assembly includes a first connecting block 5, a placement platform 6, and a fixing block 8. The first connecting block 5 is rotatably mounted on the sleeve 1 with its rotation axis set vertically. The placement platform 6 is located inside the fluid channel 2. A wire 7 is threaded through the first connecting block 5 in the vertical direction. The upper end of the wire 7 protrudes above the first connecting block 5 and is used for electrical connection with the control system. The lower end of the wire 7 passes through the sleeve 1 and is located inside the fluid channel 2 and above the placement platform 6.

[0036] like Figure 1 As shown, the fixing block 8 is located on the outer wall of the sleeve 1. The fixing block 8 is also vertically arranged, and its central axis passes through the center of the cross-section of the fluid channel 2; as shown... Figure 3 As shown, the fixing block 8 has a second through hole 9 along the vertical direction, and the second through hole 9 penetrates the side wall of the sleeve 1 and communicates with the fluid channel 2. The first connecting block 5 is rotatably connected in the second through hole 9 of the fixing block 8, and the lower end of the wire 7 is located in the fluid channel 2 through the second through hole 9. Specifically, the second through hole 9 includes a reduced diameter portion 91 and an expanded diameter portion 92 located below the reduced diameter portion 91. The diameter of the expanded diameter portion 92 is larger than that of the reduced diameter portion 91, and a stepped surface 10 is formed between the expanded diameter portion 92 and the reduced diameter portion 91. The fixing block 8 includes a cylindrical portion. The cylindrical part is divided into a quadrangular prism part and a cylindrical part. The quadrangular prism part is located at the upper end of the cylindrical part, and the reduced diameter part 91 is located inside the quadrangular prism part and penetrates the quadrangular prism part. The expanded diameter part 92 is located inside the cylindrical part and penetrates the cylindrical part, and penetrates downward through the side wall of the sleeve 1. The placement platform 6 includes a placement plate 61 and several connecting columns 62. The placement plate 61 is located inside the fluid channel 2. The upper and lower ends of the connecting columns 62 are respectively connected to the stepped surface 10 and the placement plate 61. The upper and lower ends of the connecting columns 62 can be fixed to the fixing block 8 and the placement plate 61 by bolts.

[0037] In addition, such as Figure 2As shown, the angle adjustment assembly also includes a rotating block 11, which is connected above the first connecting block 5. The rotating block 11 has a circular cross-section, and the circular rotating block 11 allows the upper end of the wire 7 to be exposed through the middle of the rotating block 11. An angle mark 12 is provided on the upper surface of the fixed block 8 along the circumferential direction, and a pointer 13 pointing to the angle mark 12 is provided on the outer wall of the rotating block 11. In this embodiment, the first connecting block 5 and the fixed block 8 are rotatably connected by a bearing, and the rotating block 11 covers the bearing. The angle mark 12 is set around the outer edge of the bearing and also around the outer edge of the rotating block 11.

[0038] A PCB board containing a flow rate and direction sensor chip is placed on a placement platform 6 and connected to wires 7. Several wires 7 are used, with the wire body fixed to the first connecting block 5. Both ends of the wires 7 expose DuPont wires for connection to the PCB board and the control system. The upper end of the wire 7 connects to the control system via a connector. In this embodiment, the control system is an MCU. A conventional fan is placed at one end of the fluid channel 2 as a fluid source. The detection part of a standard flow meter is inserted into the fluid channel 2 through the first through-hole 4. After the fan is started, airflow flows into the fluid channel 2 from the rectifier channel 16. The conical rectifier channel 16 reduces turbulence, concentrating and guiding the airflow from the fan, improving the uniformity of the airflow within the fluid channel 2. After being filtered by the rectifier mesh 17, the gas's velocity, direction, and pressure are evenly distributed across the entire rectifier mesh 17, resulting in a smoother gas flow to the detection location, which is beneficial to the PCB. The board outputs a stable signal. After the fan stabilizes, the voltage data fed back to the control system by the flow velocity and direction sensor chip is read and compared with the flow velocity detected by the standard flow meter to determine whether the flow velocity and direction sensor chip is working properly and whether the detection of fluid flow velocity is accurate. By changing the fan speed, the voltage data fed back to the control system by the flow velocity and direction sensor chip is read. When the voltage data no longer changes significantly, the upper limit of the flow velocity measurement of the flow velocity and direction sensor chip can be obtained. By rotating the first connecting block 5 (the first connecting block 5 can be rotated by rotating block 11 or the aircraft carrier plug), the angle of the flow velocity and direction sensor chip is changed, so that the relative angle between the flow velocity and direction sensor chip and the fluid changes. Reading the angle mark 12 can tell the angle of the flow velocity and direction sensor chip relative to the airflow direction at this time, and read the voltage data fed back by the flow velocity and direction sensor chip to realize the detection and calibration of the fluid flow direction by the flow velocity and direction sensor chip.

[0039] This invention can verify the normal operation of sensors in early-stage R&D scenarios such as rapid testing on production lines or medical breath screening, and test the approximate range of sensor flow rates. It can also replace traditional air pumps with traditional fans, thereby achieving low-cost, active airflow rate control, which is helpful for simple flow rate range adjustments in the early stages of R&D. The addition of an angle adjustment component allows for simple control of fluid flow direction, thereby achieving synchronous detection and calibration of the flow rate and direction of the flow rate sensor chip. The overall structure is simple, and the standard flow meter and PCB board that need to be accommodated in the fluid channel 2 are both small-volume structures. Therefore, the overall device can also be made small in size and easy to operate, enabling rapid calibration at multiple angles and flow rates.

[0040] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A flow velocity and direction sensor detection and calibration device, characterized in that, include: Sleeve (1), wherein a fluid channel (2) is provided through the sleeve (1) in the horizontal direction; A connecting pipe (3) is connected to the outer wall of the sleeve (1). The connecting pipe (3) is provided with a first through hole (4) in the vertical direction, which communicates with the fluid channel (2) and allows the detection part of the standard flow meter to enter the fluid channel (2). An angle adjustment assembly includes a first connecting block (5) and a placement platform (6). The first connecting block (5) is rotatably mounted on the sleeve (1) with its rotation axis set vertically. The placement platform (6) is located inside the fluid channel (2). A wire (7) is threaded vertically through the first connecting block (5). The upper end of the wire (7) protrudes above the first connecting block (5) and is used for electrical connection with the control system. The lower end of the wire (7) passes through the sleeve (1) and is located inside the fluid channel (2) and above the placement platform (6).

2. The flow velocity and direction sensor detection and calibration device according to claim 1, characterized in that, The angle adjustment assembly also includes a fixing block (8), which is located on the outer wall of the sleeve (1). The fixing block (8) has a second through hole (9) in the vertical direction and the second through hole (9) passes through the side wall of the sleeve (1) and communicates with the fluid channel (2). The first connecting block (5) is rotatably connected in the second through hole (9) of the fixing block (8). The lower end of the wire (7) is located in the fluid channel (2) through the second through hole (9).

3. The flow velocity and direction sensor detection and calibration device according to claim 2, characterized in that, The second through hole (9) includes a reduced diameter portion (91) and an expanded diameter portion (92) located below the reduced diameter portion (91). The diameter of the expanded diameter portion (92) is larger than that of the reduced diameter portion (91), and a stepped surface (10) is formed between the expanded diameter portion (92) and the reduced diameter portion (91). The placement platform (6) includes a placement plate (61) and a plurality of connecting posts (62). The placement plate (61) is located in the fluid channel (2). The upper and lower ends of the connecting posts (62) are respectively connected to the stepped surface (10) and the placement plate (61).

4. The flow velocity and direction sensor detection and calibration device according to claim 2, characterized in that, The angle adjustment assembly also includes a rotating block (11), which is connected above the first connecting block (5). The rotating block (11) has a circular cross-section. An angle mark (12) is provided on the upper surface of the fixed block (8) along the circumferential direction. A pointer (13) pointing to the angle mark (12) is provided on the outer wall of the rotating block (11).

5. The flow velocity and direction sensor detection and calibration device according to claim 1, characterized in that, The connecting pipe (3) is provided with a second connecting block (14) for connecting to a standard flow meter.

6. The flow velocity and direction sensor detection and calibration device according to claim 1, characterized in that, One end of the sleeve (1) is connected to a rectifier assembly, which includes a rectifier cylinder (15). The rectifier cylinder (15) is connected to one end of the sleeve (1). A rectifier channel (16) is provided through the rectifier cylinder (15) in a horizontal direction. The rectifier channel (16) is conical and its inner diameter gradually decreases in the direction away from the fluid channel (2).

7. The flow velocity and direction sensor detection and calibration device according to claim 6, characterized in that, The rectifier assembly also includes a rectifier mesh (17), which is disposed between the rectifier cylinder (15) and the sleeve (1), and the rectifier mesh (17) has a plurality of rectifier holes (18) distributed on it.

8. The flow velocity and direction sensor detection and calibration device according to claim 7, characterized in that, The sleeve (1) has a first flange (19) on its outer wall and the rectifier cylinder (15) has a second flange (20) on its outer wall. The first flange (19) and the second flange (20) are detachably connected by bolts. The rectifier mesh (17) is connected between the first flange (19) and the second flange (20).

9. The flow velocity and direction sensor detection and calibration device according to claim 1, characterized in that, The fluid channel (2) has a circular cross-section.

10. The flow velocity and direction sensor detection and calibration device according to claim 1, characterized in that, The sleeve (1) has a bracket (21) connected to its outer wall.

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