Modular flow rate measuring device based on dual-encoder pose perception

Abstract

The utility model discloses a kind of modularization flow rate measuring device based on double encoder pose perception, it is related to flow rate measurement technical field, including extension, for stretching into pipeline interior to carry out flow rate measurement, including extension pipe and the probe assembly of being arranged at its end portion, multiple pressure acquisition channels are integrated in the probe assembly;Connecting portion is located pipeline outside, is connected with extension, and is communicated with external detection instrument by flexible pipeline;Driving mechanism, sleeve is located at the outside of connecting portion, for driving extension along the axial movement of pipeline.The utility model passes through the adoption of installation ring type fixing device combination plug block and screw locking mechanism, ensure the stable installation of measuring device on the outer wall of pipeline, support quick disassembly and position adjustment simultaneously, improve the efficiency of field deployment and system operation stability.

Description

Technical Field

[0001] This utility model relates to the field of flow velocity measurement technology, specifically a modular flow velocity measurement device based on dual encoder pose perception. Background Technology

[0002] Pitot tubes, as a classic flow velocity measurement device, calculate flow velocity by measuring fluid pressure differences. They are widely used in industrial pipeline flow field analysis, fan testing, and other fields. The five-hole pitot tube, as an important variant, can construct a three-dimensional flow velocity distribution model through multi-point pressure acquisition, providing more comprehensive technical support for flow field research. Modern pitot tube systems have developed advanced technologies such as integrated dual encoder pose sensing, modular structural design, and multi-mechanism collaborative control, realizing precise control of the measurement process and convenient equipment maintenance.

[0003] However, existing Pitot tube systems still face many challenges in practical applications. First, the measurement accuracy under complex working conditions is significantly affected by pose deviations, and traditional compensation methods are difficult to meet the requirements of high-precision measurement. In addition, during traditional Pitot tube measurement, operators usually need to insert the probe module into the tube and keep it close to the tube wall with one hand, while operating the instrument with the other hand to collect and record data. This operation method not only increases the difficulty of operation, but also easily leads to measurement errors due to human factors. Especially in high-altitude, narrow, or dangerous environments, the requirement of two-handed operation further reduces work efficiency and also brings safety hazards. In addition, maintaining this operating posture for a long time can easily lead to operator fatigue, affecting measurement accuracy and continuity. Therefore, a modular flow velocity measurement device based on dual encoder pose perception is needed to solve the shortcomings of the existing system. Utility Model Content

[0004] Technical problems to be solved

[0005] Existing Pitot tube systems suffer from problems such as low efficiency, large errors, and numerous safety hazards due to the significant impact of pose deviations on measurement accuracy under complex working conditions, and the need for two-handed operation in traditional methods.

[0006] Technical solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a modular flow velocity measurement device based on dual encoder pose perception, comprising:

[0008] An extension section, used to extend into the interior of a pipe for flow velocity measurement, includes an extension tube and a probe assembly located at its end, the probe assembly integrating multiple pressure acquisition channels;

[0009] The connecting part is located outside the pipe, connected to the extension part, and connected to external testing instruments through a flexible pipeline;

[0010] A drive mechanism, sleeved on the outside of the connecting part, is used to drive the extension part to move axially along the pipe.

[0011] An angle adjustment mechanism is sleeved on the outside of the drive mechanism and is used to control the rotation of the extension and the drive mechanism as a whole.

[0012] The outer casing encloses all the aforementioned components, and its front end is equipped with a fixing device for detachably installing the entire device onto the outside of the pipe.

[0013] Furthermore, the pressure acquisition channel within the probe assembly includes five rigid tubes, one of which is located at the center, and the other four rigid tubes are distributed in a circle around the center.

[0014] Furthermore, the flexible pipeline includes a quick connector and a flexible hose. One end of the flexible hose is connected to the tail end of the extension tube via the quick connector, and the other end extends to the outside of the connection part and is connected to the main body of the testing instrument.

[0015] Furthermore, the drive mechanism includes:

[0016] The support tube is rotatably mounted inside the outer casing;

[0017] Six auxiliary wheels are fixed inside the support tube, with three wheels at one end of the connecting part and three wheels at the other end, arranged in a circular and equidistant pattern. The auxiliary wheels are attached to the surface of the connecting part.

[0018] The adjusting wheel is mounted on the inside of the support tube via a bearing seat. Its surface is made of rubber and fits the surface of the connecting part.

[0019] Motor 1, fixed on the support tube, is used to drive the adjustment wheel to rotate; by controlling the rotation of the adjustment wheel with the help of the auxiliary wheel, the connecting part moves forward or backward along its axis.

[0020] Furthermore, the angle adjustment mechanism includes:

[0021] Six support wheels are fixed inside the outer shell, with three wheels at one end of the support tube and three wheels at the other end, arranged in a circular and equidistant pattern. The support wheels are attached to the outer surface of the support tube.

[0022] The control wheel is mounted inside the housing via a bearing seat, and its surface is made of rubber and fits against the surface of the support tube.

[0023] Motor 2, fixed inside the housing, is used to drive the control wheel to rotate; by driving the control wheel to rotate, the support tube rotates inside the housing, thereby causing the probe body to rotate by an angle.

[0024] Furthermore, the fixing device includes:

[0025] The mounting ring is fixedly installed at the inspection port of the pipeline via a flange connection, with a retaining ring connected to the part of the ring furthest from the pipeline.

[0026] The locking component includes a collar and inserts symmetrically arranged at the front end of the collar, wherein the mounting ring has a socket adapted to the inserts.

[0027] Furthermore, the locking element also includes a positioning mechanism, the positioning mechanism comprising:

[0028] A pair of screws, threaded and sealed to a collar;

[0029] The fixed ring has a positioning hole that matches the end of the screw, which is used to lock the collar on the fixed ring by rotating the screw.

[0030] Furthermore, it also includes a dual encoder system, which is used to sense the position and attitude of the extension in the pipeline in real time and feed the data back to the detection instrument body for flow velocity measurement error compensation.

[0031] Furthermore, the dual encoder system includes:

[0032] The first encoder is used to measure the axial displacement of the extension;

[0033] The second encoder is used to measure the rotation angle of the extension.

[0034] The data processing module is used to fuse encoder data with pressure acquisition channel data to generate a three-dimensional flow velocity distribution map.

[0035] Compared with existing technologies, this modular flow velocity measurement device based on dual encoder pose perception has the following advantages:

[0036] I. This utility model achieves real-time monitoring and closed-loop control of the axial displacement and rotation angle of the extension through a dual encoder posture sensing system, which significantly improves the accuracy and stability of flow velocity measurement and can dynamically compensate for measurement errors caused by posture deviation.

[0037] II. This utility model, by adopting an installation ring fixing device combined with a plug and screw locking mechanism, ensures the stable installation of the measuring device on the outer wall of the pipeline, while supporting quick disassembly and position adjustment, thereby improving the efficiency of on-site deployment and the stability of system operation.

[0038] Third, this utility model achieves precise positioning of the extension part in the pipeline and flexible adjustment of the probe orientation through the coordinated control of the drive mechanism and the angle adjustment mechanism. It can adapt to different measurement points and flow field conditions and meet the needs of multi-angle and multi-point flow velocity measurement under complex working conditions. Attached Figure Description

[0039] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0040] Figure 2 This is a schematic cross-sectional view of the present invention.

[0041] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0042] Figure 4 This is a schematic diagram of the pipe and mounting ring structure of this utility model;

[0043] Figure 5 This is a schematic diagram of the application structure of this utility model.

[0044] In the diagram: 1. Extension tube; 2. Rigid tube; 3. Connecting part; 4. Drive mechanism; 401. Support tube; 402. Auxiliary wheel; 403. Adjusting wheel; 404. Motor 1; 5. Angle adjustment mechanism; 501. Support wheel; 502. Control wheel; 503. Motor 2; 6. Housing; 7. Fixing device; 701. Mounting ring; 702. Fixing ring; 703. Collar; 704. Insert block; 705. Screw; 8. Quick connector; 9. Flexible hose; 10. Insertion hole; 11. Positioning hole; 12. Sealing ring 1; 13. Sealing ring 2; 14. Sealing ring 3. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0046] like Figure 1-5 As shown, this utility model provides a technical solution: a modular flow velocity measurement device based on dual encoder pose perception. The device includes an extension section, a connecting section 3, a drive mechanism 4, an angle adjustment mechanism 5, a housing 6, and a fixing device 7. The extension section is used to extend into the pipe for flow velocity measurement. It includes a slender extension tube 1 and a probe assembly at its end. The probe assembly integrates five rigid tubes 2 as pressure acquisition channels, with one rigid tube 2 located at the center and the other four evenly distributed in a circle around the center to collect pressure signals from different directions, thereby achieving accurate measurement of fluid flow velocity. The connecting section 3 is located outside the pipe, connected to the extension section, and connected to an external detection instrument via a flexible conduit. The flexible conduit consists of a quick connector 8 and a flexible hose 9. One end of the flexible hose 9 is connected to the tail end of the extension tube 1 via the quick connector 8, and the other end extends to the outside of the connecting section 3, connecting to the detection instrument body to achieve stable transmission of pressure signals.

[0047] The outer casing 6 is equipped with detachable windows, which are bolted together. The windows are made of the same material as the main body to ensure structural strength and sealing. The window positions correspond to key internal pipes and mechanical components, such as flexible pipe connection points, motor mounting bases, and encoder terminals. By removing the windows, operators can directly inspect, replace, or clean internal pipes, circuits, or mechanical components without disassembling the entire device, significantly reducing maintenance time and operational complexity. In addition, a sealing ring 3 14 is installed between the outer casing 6 and the extension pipe 1 to ensure a tight seal between the two.

[0048] The drive mechanism 4 is sleeved on the outside of the connecting part 3 and is used to drive the extension part to move axially along the pipe. The mechanism includes six auxiliary wheels 402, one adjusting wheel 403, and a motor 404. The six auxiliary wheels 402 are all fixed inside the support pipe 401, with three wheels on one end of the connecting part 3 and three wheels on the other end, distributed in a circular and equidistant manner, and tightly fitted to the surface of the connecting part 3. The adjusting wheel 403 is installed inside the support pipe 401 through a bearing seat, and its surface is made of rubber and fits against the surface of the connecting part 3. The motor 404 is fixed on the support pipe 401 and is used to drive the adjusting wheel 403 to rotate. By controlling the rotation of the adjusting wheel 403 through the motor 404, and with the assistance of the auxiliary wheels 402, the connecting part 3 can move forward or backward along its axial direction, thereby achieving precise positioning of the extension part inside the pipe.

[0049] An angle adjustment mechanism 5 is sleeved on the outside of the drive mechanism 4 and is used to control the rotation of the extension and the drive mechanism 4 as a whole. The mechanism includes six support wheels 501, one control wheel 502 and one motor 503. The six support wheels 501 are fixed inside the housing 6. Three are set at one end of the support tube 401 and three are set at the other end, which are distributed in a circular and equidistant manner and are in contact with the outer surface of the support tube 401. The control wheel 502 is installed inside the housing 6 through a bearing seat. Its surface is made of rubber and is in contact with the surface of the support tube 401. The motor 503 is fixed inside the housing 6 and is used to drive the control wheel 502 to rotate. By driving the control wheel 502 to rotate through the motor 503, the support tube 401 rotates inside the housing 6, thereby driving the probe body to rotate at an angle, so as to achieve precise adjustment of the probe orientation.

[0050] First, the inspection port of the pipeline is fixedly connected to the mounting ring 701 by a flange, and a sealing ring 12 is provided between the inspection port and the mounting ring 701 to ensure the sealing of the connection. Since the flange size of the inspection port of different pipelines is different, the mounting ring 701 can be installed on the outside of different pipelines by connecting flanges of the corresponding size, thereby realizing the quick fixing of the mounting ring 701.

[0051] Note: A flange fixed connection is a detachable joint in which two pipes, fittings or equipment are first fixed to a flange, then a flange gasket is added between the two flanges, and finally the two flanges are tightened together with bolts (not shown in the figure) to make them tightly connected.

[0052] The outer casing 6 encloses the aforementioned components, and its front end is provided with a fixing device 7 for detachably installing the entire device on the outside of the pipe. The fixing device 7 includes a mounting ring 701 and a locking element. The mounting ring 701 is fixedly installed at the inspection port on the pipe wall, and a fixing ring 702 is connected to the part of the mounting ring 701 away from the pipe. The locking element includes a collar 703 and inserts 704 symmetrically arranged at the front end of the collar 703. The mounting ring 701 has an insertion hole 10 that matches the insert 704. The locking element also includes a positioning mechanism, which includes a pair of screws 705 threadedly connected to the collar 703. The fixing ring 702 has a positioning hole 11 that matches the end of the screws 705, which is used to lock the collar 703 by rotating the screws 705 after the collar 703 is fitted onto the fixing ring 702, ensuring that the device is installed securely. In addition, a sealing ring 13 is provided between the mounting ring 701 and the collar 703 to ensure the sealing of the connection.

[0053] The device also integrates a dual encoder system for real-time sensing of the position and orientation of the extension within the pipeline and feeding the data back to the main body of the detection instrument for flow velocity measurement error compensation. The dual encoder system includes a first encoder, a second encoder, and a data processing module. The first encoder is used to measure the axial displacement of the extension, the second encoder is used to measure the rotation angle of the extension, and the data processing module is used to fuse the encoder data with the pressure acquisition channel data to generate a three-dimensional flow velocity distribution map, thereby achieving high-precision, all-round measurement of the fluid velocity within the pipeline.

[0054] Working principle: First, the mounting ring 701 fixing device 7 is placed at the predetermined measurement point on the outer wall of the pipe to be measured. A suitable gasket is selected and installed on the outside of the fixing ring 702 to ensure that it can be tightly fitted on the outside of the fixing ring 702. Then, the extension of the measuring device (usually including a Pitot tube and a support rod, i.e., the probe assembly and extension tube 1 in this application) is aligned with the central opening of the mounting ring 701 (initially closed, but can be opened). It is slowly and steadily passed through the mounting ring 701 and extended into the pipe. During this process, attention should be paid to the initial alignment of the extension with the pipe axis to avoid misalignment that could cause collision of internal structures or measurement errors. After the extension is inserted into the pipe to the preset depth, the collar 703 is fitted on the outside of the fixing ring 702. The insert 704 at the end of the collar 703 is inserted into the insertion hole 10. Then, the screw 705 is rotated so that its end is inserted into the positioning hole 11 on the fixing ring 702, thereby fixing the entire measuring device.

[0055] Subsequently, the extension unit is connected to the dual encoder pose sensing module and data acquisition system for power-on testing and signal calibration to ensure the entire measurement system is in normal working condition. The drive mechanism 4 then controls the extension unit to move axially along the pipe, while the angle adjustment mechanism 5 precisely adjusts the probe rotation angle. The dual encoders record axial displacement and rotation angle in real time, achieving dynamic pose calibration and error compensation through a closed-loop feedback mechanism. The probe assembly adopts a five-hole rigid tube design, simultaneously acquiring multi-point pressure signals from the flow field and transmitting them to external detection instruments via flexible pipelines. A three-dimensional flow velocity distribution model is constructed by combining the pose data. The system supports multi-point measurement, automatically generating and updating flow field maps in real time. The data processing module has statistical analysis, trend prediction, and visualization output functions. During maintenance, the device is equipped with a detachable window for quick repair or replacement of internal components without disassembling the overall structure. This device is suitable for industrial scenarios such as petroleum, chemical, and water conservancy, meeting the requirements for high-precision flow velocity measurement, dynamic flow field monitoring, and long-term online operation, significantly improving measurement efficiency and data reliability.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular flow velocity measurement device based on dual encoder pose perception, characterized in that, include: An extension section for extending into the pipe to measure flow velocity includes an extension tube (1) and a probe assembly located at its end, wherein the probe assembly integrates multiple pressure acquisition channels. The connecting part (3) is located outside the pipe, connected to the extension part, and connected to the external testing instrument through a flexible pipe; The drive mechanism (4) is sleeved on the outside of the connecting part (3) and is used to drive the extension part to move along the pipe axis; An angle adjustment mechanism (5) is sleeved on the outside of the drive mechanism (4) and is used to control the overall rotation of the extension and the drive mechanism (4); The outer casing (6) encloses the above-mentioned components, and its front end is provided with a fixing device (7) for detachably installing the entire device on the outside of the pipe.

2. The modular flow velocity measurement device based on dual encoder pose perception according to claim 1, characterized in that: The pressure acquisition channel within the probe assembly includes five rigid tubes (2), one of which is located in the center, and the other four rigid tubes (2) are distributed in a circle around the center.

3. The modular flow velocity measurement device based on dual encoder pose perception according to claim 2, characterized in that: The flexible pipeline includes a quick connector (8) and a flexible hose (9). One end of the flexible hose (9) is connected to the tail end of the rigid pipe (2) through the quick connector (8), and the other end extends to the outside of the connection part (3) and is connected to the main body of the testing instrument.

4. The modular flow velocity measurement device based on dual encoder pose perception according to claim 3, characterized in that: The drive mechanism (4) includes: The support tube (401) is rotatably mounted inside the outer casing (6); Six auxiliary wheels (402) are fixed inside the support tube (401), with three wheels on one end of the connecting part (3) and three wheels on the other end, arranged in a circular and equidistant pattern. The auxiliary wheels (402) are attached to the surface of the connecting part (3). The adjusting wheel (403) is installed inside the support tube (401) through the bearing seat. Its surface is made of rubber and fits against the surface of the connecting part (3). Motor 1 (404) is fixed on the support tube (401) and is used to drive the adjustment wheel (403) to rotate. By controlling the rotation of the adjustment wheel (403) through motor 1 (404), the connecting part (3) moves forward or backward along its axis with the assistance of the auxiliary wheel (402).

5. A modular flow velocity measurement device based on dual encoder pose perception according to claim 4, characterized in that: The angle adjustment mechanism (5) includes: Six support wheels (501) are fixed inside the outer shell (6), with three wheels at one end and three wheels at the other end of the support tube (401), arranged in a circular and equidistant pattern. The support wheels (501) are attached to the outer surface of the support tube (401). The control wheel (502) is installed inside the housing (6) via a bearing seat. Its surface is made of rubber and is in contact with the surface of the support tube (401). Motor 2 (503) is fixed inside the outer shell (6) and is used to drive the control wheel (502) to rotate. By driving the control wheel (502) to rotate through motor 2 (503), the support tube (401) rotates inside the outer shell (6), thereby driving the probe body to rotate by an angle.

6. The modular flow velocity measurement device based on dual encoder pose perception according to claim 1, characterized in that: The fixing device (7) includes: The mounting ring (701) is fixedly installed at the inspection port of the pipeline by means of flange connection, and the part of it away from the pipeline is connected to the fixing ring (702). The locking component includes a collar (703) and a plug (704) symmetrically disposed at the front end of the collar (703). The mounting ring (701) has a socket (10) adapted to the plug (704).

7. A modular flow velocity measurement device based on dual encoder pose perception according to claim 6, characterized in that: The locking component further includes a positioning mechanism, the positioning mechanism comprising: A pair of screws (705) are threaded and sealed to a collar (703); The fixed ring (702) has a positioning hole (11) that matches the end of the screw (705) for locking by rotating the screw (705) after the collar (703) is fitted onto the fixed ring (702).

8. A modular flow velocity measurement device based on dual encoder pose perception according to claim 1, characterized in that, It also includes a dual encoder system, which is used to sense the position and attitude of the extension in the pipe in real time and feed the data back to the detection instrument body for flow velocity measurement error compensation.

9. A modular flow velocity measurement device based on dual encoder pose perception according to claim 8, characterized in that, The dual encoder system includes: The first encoder is used to measure the axial displacement of the extension; The second encoder is used to measure the rotation angle of the extension. The data processing module is used to fuse encoder data with pressure acquisition channel data to generate a three-dimensional flow velocity distribution map.

Images