Line pressure sensing device
By using a sensing membrane and sensing device in the pipeline sensing device, liquid pressure and pulse signals are converted into digital signals, solving the problems of high cost and incomplete detection in the existing technology, and realizing widespread use and efficient detection in disposable medical supplies.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN KAIFUMAI MEDICAL TECH CO LTD
- Filing Date
- 2025-04-14
- Publication Date
- 2026-06-09
AI Technical Summary
Existing tubular sensors are too expensive and lack comprehensive detection capabilities during high-pressure angiography injections, and cannot effectively transmit signals such as pulse.
Design a pipeline pressure sensing device that uses a sensing membrane and sensing equipment to convert liquid pressure and pulse signals into digital signals, and realizes pressure transmission through the elastic deformation of the sensing membrane, thereby reducing costs and improving detection capabilities.
It achieves cost reduction while ensuring detection function, is suitable for disposable medical supplies, can comprehensively transmit signals such as pressure and pulse, and has a high cost performance.
Smart Images
Figure CN224331313U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of high-pressure injection technology for medical devices, specifically to a pipeline pressure sensing device. Background Technology
[0002] With increasing emphasis on health, imaging technology has become widely accepted and recognized, replacing outdated methods like surgery and laboratory tests. A syringe syringe, used in conjunction with a high-pressure injector, draws contrast agent into the syringe using the injector's mechanical and electrical control. This contrast agent is then injected into the affected area of the patient, and the imaging scanning equipment forms a clear and stable image, allowing for accurate assessment of the patient's condition and guiding treatment.
[0003] The tubing of the high-pressure injection system needs to be connected to the human body. The contrast agent is injected by continuously pressurizing the tubing through the system pump. The hydraulic pressure in the tubing can reflect various indicators of the human body. Therefore, it is necessary to detect the tubing pressure of the contrast injection system or monitor human indicators to improve the safety of system use.
[0004] There are two types of existing pipeline sensors. One type uses an electronic chip to sense signals such as the pressure of the liquid in the pipeline, and then the relevant circuit transmits the signals to devices such as monitors for reading and display. The other type of pipeline sensing device uses the liquid in the pipeline to push a moving block, and then the moving block transmits the pressure to the reading device.
[0005] Existing sensing devices used in high-pressure contrast injections rely on electronic chips to sense pressure, which is too costly for single-use applications. In contrast, sensing pressure through the fluctuations of a moving block can only transmit simple pressure changes and cannot transmit other signals such as pulse, resulting in insufficient detection capabilities. Utility Model Content
[0006] This application provides a pipeline pressure sensing device that reduces costs while ensuring detection functionality, making it more suitable for use in disposable medical supplies.
[0007] According to one aspect of this application, one embodiment provides a pipeline pressure sensing device, disposed between and connecting a first pipeline and a second pipeline, comprising:
[0008] A sensing base having a sensing cavity with an open top, the sensing cavity having two liquid channels for liquid to enter and exit, the two liquid channels being respectively connected to a first pipe and a second pipe to form a liquid passage; and
[0009] A sensing membrane covers the top opening of the sensing cavity and forms a closed passage between the sensing cavity, the first conduit, and the second conduit.
[0010] The sensing membrane is stretchable and used to generate elastic deformation. The side of the sensing membrane opposite to the sensing cavity is used to mount a sensing device, which is used to convert the pressure of the sensing membrane into a digital signal.
[0011] In another embodiment, the thickness of the sensing film ranges from 0.1 mm to 0.2 mm.
[0012] In another embodiment, the sensing cavity is configured as a circular cavity.
[0013] In another embodiment, the inner wall of the sensing cavity is spherical.
[0014] In another embodiment, there is a height difference between the sensing cavity and the first and second pipelines, and the sensing cavity is positioned higher than the first and second pipelines.
[0015] In another embodiment, the first pipeline and the second pipeline are arranged coaxially, and the liquid channel is perpendicular to the first pipeline and the second pipeline.
[0016] In another embodiment, the sensing base has an annular mounting groove around the outside of the sensing cavity, and the sensing membrane has an annular mounting ring for extending into the annular mounting groove. The annular mounting ring is connected to one side of the sensing membrane to form an end cap that snaps onto the sensing cavity.
[0017] In another embodiment, the annular mounting ring is integrally formed with the sensing membrane.
[0018] In another embodiment, the sensing device includes a pressure sensor, and the sensing membrane deforms under the influence of the liquid to contact the pressure sensor.
[0019] In another embodiment, the first conduit, the second conduit, and the sensor base are integrally formed.
[0020] The pipeline pressure sensing device according to the above embodiment includes a sensing base, a sensing cavity, and a sensing diaphragm.
[0021] Liquid flows into the sensing cavity through one liquid channel and out through another, forming a channel between the sensing cavity and the pipeline. The opening of the sensing cavity is sealed by a sensing membrane. As the liquid flows through the sensing cavity, signals such as pressure and pulse are transmitted to the sensing membrane. The sensing device efficiently transmits these signals, converting mechanical signals into electronic signals for monitoring. The pressure transmission is achieved through a flexible membrane, which is much cheaper to manufacture than sensors with integrated sensing chips, making it more cost-effective for primary sensing devices and facilitating widespread use. Simultaneously, it can transmit multiple signals such as pressure and pulse, just like sensors with sensing chips, providing more comprehensive detection capabilities. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of a pipeline pressure sensing device in one embodiment;
[0023] Figure 2 This is an exploded schematic diagram of a pipeline pressure sensing device in one embodiment along the vertical direction;
[0024] Figure 3 This is a schematic diagram of the overall cross-sectional structure of the pipeline pressure sensing device in another embodiment;
[0025] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure along the vertical direction.
[0026] Figure label:
[0027] 1. First pipeline; 2. Sensor base; 3. Sensor cavity; 4. Annular mounting ring; 5. Sensor membrane; 6. Liquid channel; 7. Annular mounting groove; 8. Slot; 9. Second pipeline. Detailed Implementation
[0028] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.
[0029] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.
[0030] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).
[0031] The tubing of a high-pressure injection system needs to be connected to the human body. A pump continuously pressurizes the tubing to inject contrast agents. The hydraulic pressure within the tubing reflects various bodily indicators; therefore, it is necessary to detect the tubing pressure or monitor bodily indicators to improve system safety. Existing tubing sensors fall into two categories: one uses an electronic chip to sense signals such as the pressure of the liquid within the tubing, which are then transmitted to monitors and other devices for reading and display; the other uses a tubing sensor where the liquid within the tubing pushes a movable block, which then transmits the pressure to a reading device.
[0032] The syringes and tubing used in high-pressure contrast injection are disposable. Existing sensing devices used in high-pressure contrast injection rely on electronic chips to sense pressure, which is too costly for single use. In contrast, sensing pressure by the fluctuation of a moving block can only transmit pressure changes and cannot transmit other signals such as pulse, resulting in insufficient detection capabilities.
[0033] This application provides a pipeline pressure sensing device that can reduce costs while ensuring detection functionality, making it more suitable for use in disposable medical supplies.
[0034] Please refer to Figure 1 , Figure 2 and Figure 3 One embodiment provides a pipeline pressure sensing device disposed between and connecting a first pipeline 1 and a second pipeline 9, comprising: a sensing base 2 having a sensing cavity 3 with a top opening, the sensing cavity 3 having two liquid channels 6 for liquid entry and exit, the two liquid channels 6 being respectively connected to the first pipeline 1 and the second pipeline 9 to form a liquid passage; and a sensing membrane 5 covering the top opening of the sensing cavity 3, forming a closed passage between the sensing cavity 3, the first pipeline 1, and the second pipeline 9; the sensing membrane 5 being extensible and used to generate elastic deformation, the side of the sensing membrane 5 facing away from the sensing cavity 3 being used to mount a sensing device, the sensing device being used to convert the pressure of the sensing membrane 5 into a digital signal.
[0035] In this embodiment, please refer to Figure 2 and Figure 3 Liquid can flow into the sensing cavity 3 through one liquid channel 6 and then out through another liquid channel 6, forming a channel between the sensing cavity 3 and the pipeline. The opening of the sensing cavity 3 is sealed by the sensing membrane 5. When the liquid in the pipeline flows through the sensing cavity 3, signals such as pressure and pulse are transmitted to the sensing membrane 5. The relevant signals are efficiently transmitted to the sensing device, converting mechanical signals into electronic signals, thereby realizing monitoring. Pressure transmission is achieved through a stretchable membrane, which has a much lower manufacturing cost than sensors with sensing chips, making it more cost-effective for primary sensing devices and facilitating widespread use. At the same time, it can transmit multiple signals such as pressure and pulse like sensors with sensing chips, and its detection function is more comprehensive.
[0036] For further details, please refer to... Figure 2 and Figure 3 The thickness of the sensing membrane 5 ranges from 0.1mm to 0.2mm. Through an ultra-thin, soft, elastic, and stretchable membrane, such as medical silicone, various pressures and fluctuations of the liquid under the membrane can be clearly transmitted. The fluctuations can reflect various pressure changes of the liquid. Because of the flexibility of the sensing membrane 5, the signal loss transmitted to the sensing device can be greatly reduced, the transmission accuracy can be improved, and the cost performance is also higher.
[0037] Please refer to Figure 2 , Figure 3 and Figure 4 The sensing membrane 5 can be directly bonded to the top wall of the sensing cavity 3, or it can be covered at the opening of the sensing cavity 3 by other means. In this embodiment, an annular mounting ring 4 is provided on the sensing membrane 5, and the annular mounting ring 4 is connected to one side of the sensing membrane 5 to form an end cap that is fastened to the sensing cavity 3. The sensing base 2 has an annular mounting groove 7 around the outside of the sensing cavity 3. The annular mounting ring 4 extends into the annular mounting groove 7 and is connected and fixed to the sensing base 2, thereby covering the opening of the sensing cavity 3 with the sensing membrane 5.
[0038] In the embodiments of this application, please refer to Figure 4 The annular mounting ring 4 and the sensing membrane 5 are made of the same material and integrally molded, further enhancing the integrity and extensibility of the sensing membrane 5. The annular mounting ring 4 and the annular mounting groove 7 can be fixed by ultrasonic welding to form a mechanical interlocking structure. The annular mounting groove 7 and the sensing cavity 3 have a sealing surface of a certain width to ensure a tight fit with the sensing membrane 5.
[0039] In other embodiments, a polyester reinforcement layer may be attached to the surface of the sensing membrane 5 to prevent excessive deformation and breakage while maintaining sensitivity.
[0040] Furthermore, in this embodiment, please refer to Figure 2 , Figure 3 and Figure 4 The sensing cavity 3 is located at the upper middle part of the base. The sensing cavity 3 is a circular cavity with a round cross-section. The inner wall of the sensing cavity 3 is spherical and polished.
[0041] For further details, please refer to... Figure 2 , Figure 3 and Figure 4 The first pipe 1 and the second pipe 9 are coaxially arranged. Two liquid channels 6 are symmetrically distributed along the axial direction in the sensing cavity 3 and are connected to the first pipe 1 and the second pipe 9 respectively. There is a height difference between the sensing cavity 3 and the first pipe 1 and the second pipe 9, with the sensing cavity 3 positioned higher than the first pipe 1 and the second pipe 9. The centerline of the sensing cavity 3 is higher than the axis of the first pipe 1 and the second pipe 9, using the gravity difference to promote the bubbles to float to the top of the cavity and avoid signal interference. The liquid channels 6 are perpendicular to the first pipe 1 and the second pipe 9, and the axis of the liquid channels 6 is arranged at 90° perpendicular to the axis of the first pipe 1 and the second pipe 9, forming a double "T" shaped flow channel structure. This avoids bubble stagnation, and the spherical cavity and vertical flow channel reduce eddies, improving the signal-to-noise ratio.
[0042] For further details, please refer to... Figure 2 , Figure 3 and Figure 4 In this embodiment, the first conduit 1, the second conduit 9, and the sensor base 2 are integrally formed. Specifically, the sensor base 2 is integrally formed with the first conduit 1 and the second conduit 9 through injection molding, forming a leak-free, sealed flow channel. The base material can be medical-grade polycarbonate (PC), which has high strength and high chemical stability.
[0043] In this embodiment, the sensing device includes a pressure sensor, which is mounted on the outside of the sensing diaphragm 5 on the upper end of the sensing base 2. Taking a piezoresistive pressure sensor (such as the Honeywell 26PC series) as an example, the deformation of the sensing diaphragm 5 directly acts on the ceramic sensing surface of the pressure sensor, outputting a linear voltage signal. The pressure sensor can be fixed to the sensing base 2 by a snap-fit structure. A corresponding slot 8 is provided on the upper end of the sensing base 2, allowing for disassembly and reuse.
[0044] The tubing pressure sensing device disclosed in this embodiment allows contrast agent or other liquids to enter the sensing cavity 3 from the first tubing 1 via the left liquid channel 6. After filling, the liquid flows from the right channel to the second tubing 9, or from the second tubing 9 via the right liquid channel 6 to the sensing cavity 3. After filling, the liquid flows from the left channel to the first tubing 1. The liquid pressure acts uniformly on the inner surface of the sensing membrane 5. The system pump pressure causes the sensing membrane 5 to bulge outward, with the deformation proportional to the pressure. The sensor outputs a corresponding electrical signal. The patient's vascular pulsation causes fluctuations in the fluid pressure, resulting in micron-level vibrations in the sensing membrane 5. The sensor captures the frequency signal and extracts the pulse waveform after FFT conversion. The sensing membrane 5 is designed to support both high-pressure and low-pressure measurements, making it suitable for both contrast injection and vital sign monitoring scenarios. Furthermore, its low cost makes it suitable for disposable medical devices.
[0045] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.
Claims
1. A pipeline pressure sensing device, disposed between and connecting a first pipeline (1) and a second pipeline (9), characterized in that, include: The sensing base (2) has a sensing cavity (3) with an opening at the top. The sensing cavity (3) is provided with two liquid channels (6) for liquid to enter and flow out. The two liquid channels (6) are respectively connected to the first pipeline (1) and the second pipeline (9) to form a liquid passage. as well as A sensing membrane (5) covers the top opening of the sensing cavity (3) and forms a closed passage between the sensing cavity (3), the first conduit (1), and the second conduit (9). The sensing membrane (5) is stretchable and is used to generate elastic deformation. The side of the sensing membrane (5) facing away from the sensing cavity (3) is used to install a sensing device. The sensing device is used to convert the pressure of the sensing membrane (5) into a digital signal.
2. The pipeline pressure sensing device as described in claim 1, characterized in that, The thickness of the sensing membrane (5) ranges from 0.1 mm to 0.2 mm.
3. The pipeline pressure sensing device as described in claim 1, characterized in that, The sensing cavity (3) is configured as a circular cavity.
4. The pipeline pressure sensing device as described in claim 3, characterized in that, The inner wall of the sensing cavity (3) is spherical.
5. The pipeline pressure sensing device as described in claim 1, characterized in that, There is a height difference between the sensing cavity (3) and the first pipeline (1) and the second pipeline (9), and the sensing cavity (3) is set higher than the first pipeline (1) and the second pipeline (9).
6. The pipeline pressure sensing device as described in claim 5, characterized in that, The first pipeline (1) and the second pipeline (9) are arranged on the same axis, and the liquid channel (6) is perpendicular to the first pipeline (1) and the second pipeline (9).
7. The pipeline pressure sensing device according to any one of claims 1-6, characterized in that, The sensing base (2) has an annular mounting groove (7) around the outside of the sensing cavity (3). The sensing membrane (5) is provided with an annular mounting ring (4) for extending into the annular mounting groove (7). The annular mounting ring (4) is connected to one side of the sensing membrane (5) to form an end cap that is fastened to the sensing cavity (3).
8. The pipeline pressure sensing device as described in claim 7, characterized in that, The annular mounting ring (4) is integrally formed with the sensing membrane (5).
9. The pipeline pressure sensing device as described in claim 1, characterized in that, The sensing device includes a pressure sensor, and the sensing membrane (5) is deformed by the liquid and comes into contact with the pressure sensor.
10. The pipeline pressure sensing device as described in claim 1, characterized in that, The first pipeline (1), the second pipeline (9) and the sensor base (2) are integrally formed.