Closed pressure sensor

Abstract

A closed pressure sensor, comprising a light-emitting portion, a grating portion and a photoelectric portion, wherein the light-emitting portion is a light source bin and is used for providing a light source; the grating portion is a pressure-sensitive element and is used for changing a light path according to a change in fluid pressure; the photoelectric portion is a signal processing unit and is used for converting an optical signal into an electric signal and providing the electric signal for an external monitoring device; and the light-emitting portion, the grating portion and the photoelectric portion are sequentially connected and combined to form the closed pressure sensor. When there is a change in fluid pressure of an environment where a closed pressure sensor is located, a grating portion deforms, such that a light channel therein changes, and a photoelectric portion converts a captured optical signal into an electric signal and outputs same, thereby realizing real-time monitoring of the fluid pressure of the environment where the closed pressure sensor is located.

Description

A closed pressure sensor Technical Field

[0001] The invention relates to a closed pressure sensor, belonging to the field of sensing technology. Background Art

[0002] Pressure sensors are crucial in medical devices, playing a key role in a variety of monitoring and diagnostic procedures. For example, in blood pressure monitoring, they measure a patient's systolic and diastolic blood pressure, making them crucial for diagnosing heart disease and hypertension. Ventilators and pulmonary function testing devices utilize pressure sensors to monitor and control airflow and assess a patient's respiratory function. In neurosurgery, intracranial pressure is monitored to manage conditions such as brain injury or brain tumors. Furthermore, pressure sensors are used during intravenous infusion and hemodialysis to ensure the appropriate pressure during fluid delivery. In obstetrics, they monitor uterine contractions and fetal heartbeats, providing data support for health during delivery. In minimally invasive surgery, pressure sensors help doctors precisely control surgical instruments, improving surgical safety. Pressure sensors also play a role in the regular calibration of medical equipment, ensuring measurement accuracy. Sleep monitoring devices also use them to detect sleep-disordered breathing. These applications demonstrate the diversity and importance of pressure sensors in the medical field.

[0003] Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a closed pressure sensor.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A closed pressure sensor includes a light emitting portion, a grating portion, and a photoelectric portion; wherein,

[0007] The light-emitting portion is used to provide a light source; the grating portion is a light path, and its shape changes according to the change of fluid pressure; the photoelectric portion is used to convert the light signal into an electrical signal and provide it to an external monitoring device;

[0008] The light emitting portion, the grating portion and the photoelectric portion are sequentially connected and combined to form the closed pressure sensor;

[0009] When the fluid pressure in the environment where the closed pressure sensor is located changes, the grating part deforms, causing the light channel inside it to change. The photoelectric part converts the captured light signal into an electrical signal output, thereby realizing real-time monitoring of the fluid pressure in the application environment.

[0010] Preferably, inside the closed pressure sensor, a first partition is provided at the connection between the light-emitting part and the grating part, and a second partition is provided at the connection between the grating part and the photoelectric part. The first partition and the second partition are used to separate the two adjacent parts to form an independent space.

[0011] Preferably, the outer shell of the light-emitting part is made of hard material, and the interior is a light source chamber; the light source chamber is made of highly light-transmitting material, the inner wall is coated with phosphorescent material, and is filled with tritium gas to form a tritium lamp.

[0012] Preferably, the grating body is made of a flexible material and is provided with a through hole inside for transmitting the light from the light-emitting part to the photoelectric part.

[0013] Preferably, the through holes of the grating portion are in a honeycomb shape, or in a strip-shaped grating shape with at least two layers arranged in an alternating manner.

[0014] Preferably, the housing of the photoelectric part is made of hard material, and is internally provided with a photoelectric sensor, an analog-to-digital converter, a power supply battery and a plurality of optical fibers;

[0015] One end of each optical fiber facing the grating part is spherical, and the other end is connected to the input end of the photoelectric sensor, and the output end of the photoelectric sensor is connected to the input end of the analog-to-digital converter; the output end of the power supply battery is respectively connected to the power supply end of the photoelectric sensor and the analog-to-digital converter to provide them with working power.

[0016] Preferably, a signal transmitter is further provided inside the photoelectric part, and the output end of the analog-to-digital converter is connected to the input end of the signal transmitter for transmitting the pressure electrical signal to an external monitoring device.

[0017] Preferably, the light emitting portion, the grating portion and the photoelectric portion are formed by integrated injection molding, or are formed by threaded connection.

[0018] Preferably, the light emitting portion and the grating portion are formed by integrated injection molding and then combined with the photoelectric portion by threaded connection.

[0019] Preferably, the first partition and the second partition are made of highly light-transmitting materials.

[0020] Compared to existing technologies, the enclosed pressure sensor provided by the present invention utilizes a light source chamber and a flexible grating as pressure-sensitive elements, combined with a photoelectric signal processing unit, to achieve real-time monitoring of fluid pressure within a pipeline or container. The enclosed pressure sensor provided by the present invention offers advantages such as a clever and rational structural design, low design cost, high operating efficiency, and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 1A and 1B are schematic structural diagrams of a closed pressure sensor provided in an embodiment of the present invention;

[0022] FIG2 is an external view of the light-emitting portion, the grating portion, and the photoelectric portion in an embodiment of the present invention;

[0023] 3A and 3B are schematic structural diagrams of through holes inside a grating portion according to an embodiment of the present invention;

[0024] FIG4 is a schematic diagram of the photoelectric conversion principle in the photoelectric unit according to an embodiment of the present invention; DETAILED DESCRIPTION

[0025] The technical content of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] As shown in Figures 1A and 1B , an embodiment of the present invention provides a closed-type pressure sensor, which has a ball-ended cylindrical shape (see Figure 1A ) or a straight-ended cylindrical shape (see Figure 1B ), and comprises a light-emitting portion, a grating portion, and a photoelectric portion. The light-emitting portion, grating portion, and photoelectric portion can be integrally formed by injection molding or assembled as three sequentially connected sections.

[0027] The light-emitting section is the head section of the enclosed pressure sensor and serves as the light source, providing light. The grating section is the middle section of the enclosed pressure sensor, providing a light path and a pressure-sensitive element, changing shape in response to changes in fluid pressure. The photoelectric section is the tail section of the enclosed pressure sensor and serves as the signal processing unit, converting optical signals into electrical signals and providing them to external monitoring equipment.

[0028] Inside the enclosed pressure sensor, a first partition is located at the junction of the light-emitting section and the grating section, and a second partition is located at the junction of the grating section and the photoelectric section. These partitions separate the two sections into independent spaces and also prevent contamination of the grating or photoelectric sections if the source chamber is damaged.

[0029] As shown in Figure 2, in one embodiment of the present invention, the outer shell of the light-emitting unit is made of a hard material, such as a metal, polymer, or bioceramic material. A light source compartment is located within the light-emitting unit. This compartment is made of a highly light-transmitting material. The inner wall of the compartment is coated with a phosphor and filled with tritium gas, forming a beta lamp (also known as a tritium lamp) that provides light.

[0030] The grating portion is made of a flexible material, for example, polyester, silicone and other flexible materials with good elasticity. A through hole is provided inside the grating portion for passing light, which is used to transmit the light from the light-emitting portion to the photoelectric portion. The shape of the through hole is shown in Figures 3A and 3B, and can be designed as a honeycomb shape, or as a plurality of rows of staggered strip bars extending toward the axis. The strip bar-shaped grating portion in Figures 3A and 3B has 6 strip bars designed along the circumference, and the number of strip bars designed can be increased or decreased according to actual needs. At least two layers of strip bars should be set in the axial direction of the grating portion, and the two adjacent layers of strip bars should be staggered.

[0031] The first partition, located at the junction of the light-emitting portion and the grating portion, is made of a highly transparent material, such as glass or acrylic, to separate the light-emitting portion and the grating portion, forming an independent space. A convex lens can also be used for the first partition, which, in addition to its separation function, can also amplify the light from the light source compartment.

[0032] The second partition provided at the connection between the grating part and the photoelectric part is made of a highly light-transmitting material, such as glass or acrylic sheet, and is used to separate the grating part and the photoelectric part to form an independent space.

[0033] As shown in FIG4 , in one embodiment of the present invention, the outer shell of the optoelectronic unit is made of a hard material, such as a metal material, a polymer material, a bioceramic material, etc. A photoelectric sensor, an analog-to-digital (A / D) converter, a signal transmitter, a power supply battery, and multiple optical fibers are provided inside. The end of each optical fiber facing the grating unit is spherical to better capture and transmit light. The other end of each optical fiber is connected to the input of the photoelectric sensor, the output of the photoelectric sensor is connected to the input of the A / D converter, and the output of the A / D converter is connected to the input of the signal transmitter. The output of the power supply battery is connected to the power supply of the photoelectric sensor, the A / D converter, and the signal transmitter, respectively, to provide them with operating power.

[0034] Among them, the photoelectric sensor is used to convert the optical signal into an analog electrical signal; the analog-to-digital converter is used to convert the analog electrical signal into a digital electrical signal; and the signal transmitter is used to send the digital electrical signal to an external monitoring device.

[0035] Depending on the use environment of the closed pressure sensor, the signal transmitter unit can be eliminated from the photoelectric part and replaced with a transmission method with an output wire to transmit the digital electrical signal to the external monitoring device.

[0036] In one embodiment of the present invention, the light-emitting portion, grating portion, and photoelectric portion of the enclosed pressure sensor can be formed using either integrated injection molding or threaded assembly. Enclosed pressure sensors using integrated injection molding are suitable for short-term use and are easy to manufacture; enclosed pressure sensors using threaded assembly are suitable for long-term use. In the event of damage or aging, each section can be disassembled and replaced, resulting in lower maintenance costs.

[0037] Alternatively, the enclosed pressure sensor's light-emitting, grating, and photoelectric components can be connected using another combined connection method: the light-emitting and grating components are integrally injection-molded and then threaded together with the photoelectric component. The beta lamp typically has a service life of 8 to 10 years, so frequent replacement is unnecessary. The photoelectric component utilizes a removable threaded connection, facilitating maintenance or replacement of its electrical components.

[0038] The above describes the overall structure of the enclosed pressure sensor in detail. It should be noted that, in addition to the beta lamp described in the above embodiments, the light source of the light-emitting portion may also employ other active or passive light sources. In addition to the honeycomb and bar-shaped through-holes described in the embodiments, other shapes may also be employed for the grating portion. This embodiment of the present invention imposes no limitations on this.

[0039] In addition, when the closed pressure sensor is used in the medical field as an implantable pressure sensor, the materials of its light-emitting part, grating part and photoelectric part must all be medical-grade materials to comply with medical industry standards.

[0040] The working principle of the enclosed pressure sensor provided by the embodiment of the present invention is described below with reference to the accompanying drawings.

[0041] Depending on the operating environment, the enclosed pressure sensor is installed and delivered to a designated location within a pipeline or container. During operation, the beta lamp in the enclosed pressure sensor's light-emitting section continuously emits light. The emitted light passes through the through-holes in the grating section, is captured by the optical fiber in the photoelectric section, and transmitted to the photoelectric sensor. The photoelectric sensor converts the light signal into an analog electrical signal, which is then converted into a digital electrical signal through an analog-to-digital converter. Finally, the digital electrical signal is transmitted to an external monitoring device via a signal transmitter, or the digital electrical signal output by the analog-to-digital converter is directly output to the external monitoring device via a wire.

[0042] When the pressure of the fluid in a pipe or container changes, the grating portion of the closed pressure sensor is deformed by the pressure, causing the internal honeycomb or bar-shaped through-hole structure to deform, resulting in a change in the size of the light channel. As a result, the luminous flux captured by the optical fiber of the photoelectric portion changes. At this time, the analog electrical signal output by the photoelectric sensor and the digital electrical signal output by the analog-to-digital converter also change accordingly, realizing real-time monitoring of the fluid pressure in the pipe or container.

[0043] In summary, compared with existing technologies, the enclosed pressure sensor provided by the present invention utilizes a light source chamber and a flexible grating as pressure-sensitive elements, combined with a photoelectric signal processing unit, to achieve real-time monitoring of fluid pressure within a pipeline or container. The enclosed pressure sensor provided by the present invention offers advantages such as a clever and rational structural design, low design cost, high operating efficiency, and easy maintenance.

[0044] It should be noted that the above embodiments are only examples, and the technical solutions of the various embodiments can be combined and are all within the protection scope of the present invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0046] The enclosed pressure sensor provided by the present invention is described in detail above. For those skilled in the art, any obvious modification made thereto without departing from the essence of the present invention will constitute an infringement of the patent rights of the present invention and will result in corresponding legal liability.

Claims

1. A closed pressure sensor, characterized in that It includes a light-emitting part, a grating part and a photoelectric part; wherein, The light-emitting part is used to provide a light source; the grating part is a light path, and its shape changes according to the change of fluid pressure; the photoelectric part is used to convert the optical signal into an electrical signal and provide it to an external monitoring device; The light emitting part, the grating part and the photoelectric part are sequentially connected and combined to form the closed pressure sensor; When the fluid pressure in the environment where the closed pressure sensor is located changes, the grating part is deformed, causing the light channel inside it to change. The photoelectric part converts the captured light signal into an electrical signal output, thereby realizing real-time monitoring of the fluid pressure in the application environment.

2. The closed pressure sensor according to claim 1, characterized in that: Inside the closed pressure sensor, a first partition is provided at the connection between the light-emitting part and the grating part, and a second partition is provided at the connection between the grating part and the photoelectric part. The first partition and the second partition are used to separate two adjacent parts to form an independent space.

3. The closed pressure sensor according to claim 1, characterized in that: The outer shell of the light-emitting part is made of hard material, and the interior is a light source chamber; the light source chamber is made of highly light-transmitting material, the inner wall is coated with phosphorescent material, and is filled with tritium gas to form a tritium lamp.

4. The closed pressure sensor according to claim 1, characterized in that: The grating part is made of a flexible material and is provided with a through hole inside for transmitting the light of the light-emitting part to the photoelectric part.

5. The closed pressure sensor according to claim 4, characterized in that: The through holes of the grating part are in a honeycomb shape, or in a strip-shaped grating shape with at least two layers arranged in an alternating manner.

6. The closed pressure sensor according to claim 1, characterized in that: The outer shell of the photoelectric part is made of hard material, and is internally provided with a photoelectric sensor, an analog-to-digital converter, a power supply battery and a plurality of optical fibers; One end of each optical fiber facing the grating part is spherical, and the other end is connected to the input end of the photoelectric sensor, and the output end of the photoelectric sensor is connected to the input end of the analog-to-digital converter; the output end of the power supply battery is connected to the photoelectric sensor, the analog The power supply terminal of the digital converter is connected to provide it with working power.

7. The closed pressure sensor according to claim 6, characterized in that: A signal transmitter is also provided inside the photoelectric part, and the output end of the analog-to-digital converter is connected to the input end of the signal transmitter for transmitting the pressure electrical signal to an external monitoring device.

8. The closed pressure sensor according to claim 1, characterized in that: The light emitting part, the grating part and the photoelectric part are formed by integrated injection molding, or are combined by threaded connection.

9. The closed pressure sensor according to claim 1, characterized in that: The light emitting part and the grating part are formed by integrated injection molding, and then connected and assembled with the photoelectric part by screw thread.

10. The closed pressure sensor according to claim 2, characterized in that: The first partition plate and the second partition plate are made of highly light-transmitting materials.

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