Capsule pressure measuring device

Abstract

The present application discloses a capsule-type pressure measurement device, which includes a capsule shell, an image acquisition component, and a liquid column pressure sensor. The image acquisition component is disposed within the capsule shell, and the liquid column pressure sensor is attached to the outer surface of the capsule shell. The image acquisition component is capable of capturing an image of the liquid column pressure sensor and thereby reading the pressure value of the liquid column pressure sensor. Because the liquid column pressure sensor of the present application is attached to the outer surface of the capsule shell, it does not occupy space within the capsule shell, allowing the capsule shell to be made smaller. Furthermore, because the liquid column pressure sensor itself is relatively thin, it occupies very little space outside the capsule shell, allowing the overall volume of the capsule-type pressure measurement device to be made smaller.

Description

Technical Field

[0001] The present application relates to the technical field of pressure measurement, and in particular to a capsule-type pressure measuring device with a liquid column pressure sensor. Background Art

[0002] Existing capsule-type pressure measuring devices for measuring digestive tract, uterine, or vaginal pressure generally use MEMS (Micro-Electro-Mechanical System) sensors for measurement. MEMS sensors require secondary packaging to meet biocompatibility requirements. However, this secondary packaging affects the range and accuracy of the sensor output, the process is complex, and the device is large in size, which is not conducive to the miniaturization of the capsule device. Summary of the Invention

[0003] In order to overcome the problems existing in the above-mentioned prior art, the main purpose of this application is to provide a capsule-type pressure measuring device with simple process and small size.

[0004] In order to achieve the above objectives, this application specifically adopts the following technical solutions:

[0005] The present application provides a capsule-type pressure measuring device, which includes a capsule shell, an image acquisition component and a liquid column pressure sensor. The image acquisition component is arranged in the capsule shell, and the liquid column pressure sensor is attached to the outer surface of the capsule shell. The image acquisition component can acquire an image of the liquid column pressure sensor and thus read the pressure value of the liquid column pressure sensor.

[0006] Preferably, the capsule shell includes a cylindrical surface, and the liquid column pressure sensor is attached to the cylindrical surface of the capsule shell.

[0007] Preferably, the liquid column pressure sensor comprises a liquid capsule, an imageable liquid and a scaled liquid column, the liquid capsule and the scaled liquid column are in communication, and the imageable liquid is disposed in the liquid capsule.

[0008] Preferably, the liquid capsule has a receiving cavity, the graduated liquid column has a liquid column cavity, the receiving cavity and the liquid column cavity are in communication, and the imageable liquid is disposed in the receiving cavity;

[0009] When the liquid capsule is pressurized, the accommodating cavity can be deformed, and the imageable liquid in the accommodating cavity can be pressed into the liquid column cavity. When the imageable liquid flows in the liquid column cavity, it can correspond to different scales.

[0010] Preferably, the liquid capsule includes a pressure-sensitive membrane, and the pressure-sensitive membrane surrounds the accommodating cavity;

[0011] When subjected to pressure, the pressure-sensitive membrane can be deformed toward the interior of the accommodation cavity, and when the pressure disappears, the pressure-sensitive membrane can return to its original state.

[0012] Preferably, the liquid capsule and the graduated liquid column both include a pressure-sensitive membrane, and the pressure-sensitive membrane encloses the accommodating cavity and the liquid column cavity; the cross-sectional area of ​​the accommodating cavity is larger than the cross-sectional area of ​​the liquid column cavity.

[0013] Preferably, the liquid capsule comprises a gas chamber and a liquid chamber, the gas chamber and the liquid chamber are separated by a driving plate, and the volumes of the gas chamber and the liquid chamber are adjusted by movement of the driving plate;

[0014] The liquid cavity contains the imageable liquid. The imageable liquid in the liquid cavity can enter the liquid column cavity, and the imageable liquid in the liquid column cavity can also enter the liquid cavity.

[0015] Preferably, the imageable liquid is one or more of methylene blue, beetroot red, and vitamin B.

[0016] Preferably, the capsule pressure measuring device further comprises a data transmission component, the image acquisition component comprises a camera and an image sensor, the image sensor is connected to the camera and the data transmission component respectively, and the scaled liquid column is located within the viewing angle of the camera.

[0017] Preferably, the camera has an effective imaging angle α1, and the capsule shell includes a transparent portion, and the transparent portion can cover the space where the effective imaging angle α1 is located;

[0018] The image sensor has a display image angle α2, the transparent portion can cover the space where the display image angle α2 is located, and α1>α2;

[0019] The liquid column pressure sensor is installed on the outer wall of the capsule shell and is located in the space between the effective imaging angle α1 and the display image angle α2. The data transmission component can read data from the liquid column pressure sensor.

[0020] Preferably, the camera has an effective imaging angle α1, and the capsule shell includes a transparent portion, and the transparent portion can cover the space where the effective imaging angle α1 is located;

[0021] The image sensor has a display image angle α2, the transparent portion can cover the space where the display image angle α2 is located, and α1>α2;

[0022] The liquid column pressure sensor is mounted on the outer wall of the capsule shell and is located in the space occupied by the display image angle α2. The image sensor can read data from the liquid column pressure sensor.

[0023] Preferably, the capsule shell includes a rear shell and a front shell, the rear shell and the front shell are cooperatively connected to form a cavity, the data transmission component, the image sensor and the camera are respectively arranged in the cavity, the front shell is set to be transparent, and the camera is arranged at one end close to the front shell, the front shell includes a cylindrical surface, and the liquid column pressure sensor is attached to the cylindrical surface of the front shell or the end of the front shell.

[0024] Preferably, the capsule shell includes a rear shell and a front shell, and the rear shell and the front shell are matched and connected to form a cavity together. The data transmission component, the image sensor and the camera are respectively arranged in the cavity. The front shell and the rear shell are both set to be transparent, and cameras are arranged near both ends of the front shell and the rear shell. The liquid column pressure sensor is attached to the cylindrical surface of the front shell, the cylindrical surface of the rear shell, the end of the front shell or the end of the rear shell, or the liquid column pressure sensor is attached to the rear shell and the front shell at the same time.

[0025] Preferably, the capsule-type pressure measuring device further includes a plurality of liquid column-type pressure sensors, and the range and type of each of the liquid column-type pressure sensors are the same or different.

[0026] Preferably, the liquid capsule and the graduated liquid column are respectively made of biocompatible materials.

[0027] Compared with the existing technology, the liquid column pressure sensor of the present application can meet the biocompatibility requirements without secondary packaging, and its process is simple; in addition, since the liquid column pressure sensor is attached to the outer surface of the capsule shell, it does not occupy the space inside the capsule shell, so the capsule shell can be made smaller. Because the liquid column pressure sensor itself is relatively thin, it occupies very little space outside the capsule shell, so the overall volume of the capsule pressure measuring device can be made smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a three-dimensional exploded view of the capsule pressure measurement device according to an embodiment of the present application.

[0029] Figure 2 This is a three-dimensional diagram of a capsule-type pressure measurement device according to an embodiment of the present application.

[0030] Figure 3 for Figure 1 Schematic diagram of the liquid column pressure sensor structure.

[0031] Figure 4for Figure 3 Middle AA section view.

[0032] Figure 5 Figure 3 Middle BB cross-sectional view

[0033] Figure 6 This is a schematic structural diagram of a liquid column pressure sensor according to another embodiment of the present application.

[0034] Figure 7 for Figure 2 A partial cross-sectional view of .

[0035] Figure 8 This is a top view of a capsule-type pressure measurement device according to one embodiment of the present application.

[0036] Figure 9 This is a top view of a capsule-type pressure measurement device according to one embodiment of the present application.

[0037] Figure 10 This is a diagram of the rear end cap structure of an embodiment of the present application;

[0038] Figure 11 This is a schematic diagram of the interconnected structure of the capsule-type pressure measuring device, the rear end cap, and the needle tube according to an embodiment of the present application;

[0039] Figures 12 to 15 Schematic diagram of the state of the pressure measuring device of the embodiment of the present application at various positions within the body to be examined;

[0040] Figure ID:

[0041] 1. Capsule shell; 10. Cylindrical surface; 11. Back shell; 12. Front shell; 2. Data transmission component; 21. Antenna; 22. Data acquisition and processing module; 23. Battery; 3. Image acquisition component; 31. Camera; 32. Image sensor; 33. Illumination lamp; 4. Liquid column pressure sensor; 41. Liquid capsule; 411. Receiving chamber; 412. Gas chamber; 413. Liquid chamber; 42. Scaled liquid column; 421. Liquid column chamber; 43. Drive board; 44. Pressure-sensitive film; 45. Adhesive; 5. Rear end cap; 51. Suction cup; 52. Ventilation tube; 6. Needle tube; 100. Capsule pressure measuring device; 200. Tube wall of the object to be inspected; D1-Effective imaging angle boundary; D2-Effective observation angle boundary. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0043] like Figure 1 、 Figure 2 As shown, an embodiment of the present application discloses a capsule pressure measurement device 100, which includes a capsule shell 1, a data transmission component 2, an image acquisition component 3, and a liquid column pressure sensor 4. The data transmission component 2 and the image acquisition component 3 are respectively disposed within the capsule shell 1, and the image acquisition component 3 is connected to the data transmission component 2. The liquid column pressure sensor 4 is attached to the outer surface of the capsule shell 1, and the image acquisition component 3 is used to acquire a scale value image of the liquid column pressure sensor 4. The liquid column pressure sensor 4 is attached to the outer surface of the capsule shell 1 by a transparent adhesive material. The transparent adhesive backing is biocompatible and can be, but is not limited to, medical-grade UV adhesive, medical instant adhesive, or medical adhesive backing.

[0044] In an embodiment of the present application, the liquid column pressure sensor 4 is attached to the outer surface of the capsule housing 1 (e.g., by gluing). Specifically, when encapsulating the liquid within the liquid column pressure sensor 4, the encapsulation is performed on a curved surface, so that the liquid column pressure sensor 4 has a curved surface upon completion. Furthermore, compared to conventional MEMS sensors, the plastic film used to encapsulate the liquid indicating the scale in the liquid column pressure sensor of the present application is made of a biocompatible material, such as transparent silicone, TPU (thermoplastic urethanes), PET (polyethylene terephthalate), etc. Therefore, it can meet biocompatibility requirements without the need for secondary encapsulation, simplifying the process. Furthermore, since the liquid column pressure sensor 4 is attached to the outer surface of the capsule shell 1, it does not occupy the space inside the capsule shell 1, so the capsule shell 1 can be made smaller, and the liquid column pressure sensor 4 itself is relatively thin, with a thickness of only 0.1mm~0.5mm, a width of only 0.2mm-1mm, and a length less than the circumference of the capsule shell 1. Therefore, the liquid column pressure sensor 4 occupies very little space outside the capsule shell 1, and the overall volume of the capsule pressure measuring device can be made smaller.

[0045] Furthermore, the capsule housing 1 includes a cylindrical surface 10. In this embodiment, the liquid column pressure sensor 4 is attached to the cylindrical surface 10 of the capsule housing 1 using a colloid made of a biocompatible material. It is understood that in other embodiments, the liquid column pressure sensor 4 may also be attached to the cylindrical surface 10 of the capsule housing 1 using other methods, such as heat pressing or transparent adhesive.

[0046] When measuring the pressure of the subject to be examined, the capsule-type pressure measuring device of the present application is placed in the subject to be examined, so that the direct muscle pressure of the subject's tube wall at different positions, the gas pressure in the subject's cavity, and the liquid pressure act on the liquid column pressure sensor 4, resulting in different liquid level scales on the liquid column pressure sensor 4. The image acquisition component 3 then acquires the liquid level scale image on the liquid column pressure sensor 4 and transmits it to an external device through the data transmission component 2. The external device analyzes and obtains the pressure value in the subject to be examined. Specifically, in one embodiment of the present application, the subject to be examined is the digestive tract. It is understood that the subject to be examined may also be the uterus, vagina, rectum, or female urethra, etc.

[0047] like Figures 12 to 15 As shown, in Figure 12-15 In the embodiment, the direct muscle pressure of the tube wall 200 of the specimen acts on the liquid column pressure sensor 4 of the capsule pressure measuring device 100; Figure 14 In the embodiment, the gas pressure in the digestive tract of the subject acts on the liquid column pressure sensor 4 of the capsule pressure measuring device 100; and Figure 15 In the embodiment, the liquid pressure in the digestive tract of the subject acts on the liquid column type pressure sensor 4 of the capsule type pressure measuring device 100 .

[0048] The existing capsule-type device for measuring the pressure of the subject to be tested places the MEMS sensor at the head or tail end of the capsule. However, the tubular parts such as the esophagus and intestines are generally coaxial with the capsule, so when the muscles of the subject to be tested contract, the force will act on the cylindrical surface of the capsule. When the muscles of the subject to be tested cover the cylindrical surface of the capsule but do not completely cover both ends, the pressure of the subject to be tested will be distorted. The present application attaches the liquid column pressure sensor 4 to the cylindrical surface of the capsule shell 1, and in the tubular parts such as the esophagus and intestines that are coaxial with the capsule shell, the force when the muscles of the subject to be tested contract acts on the cylindrical surface of the capsule shell, that is, the muscles of the subject to be tested are covered by the liquid column pressure sensor 4, thereby making the measured pressure value inside the subject to be tested more accurate.

[0049] The capsule housing 1 comprises a rear shell 11 and a front shell 12. The data transmission component 2 includes an antenna 21, a data acquisition and processing module 22, and a battery 23. The image acquisition component 3 includes an image sensor 32, a camera 31, and a light 33, which is an LED. The rear shell 11 and the front shell 12 are coupled together to form a cavity. The front shell 12 is transparent. The antenna 21, data acquisition and processing module 22, battery 23, image sensor 32, light 33, and camera 31 are disposed sequentially within the cavity formed by the rear shell 11 and the front shell 12. The battery 23 provides power to the data acquisition and processing module 22, image sensor 32, camera 31, and light 33, respectively. The image sensor 32 is connected to the camera 31 and the data acquisition and processing module 22, respectively.

[0050] like Figure 3 、 Figure 4 、 Figure 5 As shown, in this embodiment, the liquid column pressure sensor 4 includes a liquid capsule 41, a graduated liquid column 42, and an imageable liquid. The graduated liquid column 42 contains a liquid column cavity 421, with each grid in the graduated liquid column 42 representing 1 mmHg (millimeters of mercury), 2 mmHg, or 5 mmHg, for example. The imageable liquid can be imaged by the image acquisition component 3. Specifically, the imageable liquid is a liquid with distinct color characteristics, making its color distinguishable from the color of human cavity tissue. For example, the imageable liquid can be a colored liquid such as a fluorescent liquid, a green liquid, a blue liquid, or a black liquid. When connected, the end of the liquid capsule 41 is connected to the graduated liquid column 42, and the imageable liquid is disposed within the liquid capsule 41. Both the liquid capsule 41 and the graduated liquid column 42 are made of biocompatible materials. It is understood that in other embodiments, the liquid column 42 can also be connected to the middle or other parts of the liquid capsule 41.

[0051] In this application, the measurement range of the liquid column pressure sensor 4 is 0-300 mmHg, with each grid of 10 mmHg and a total of 30 grids. The reason for using colored liquid is that the camera is more sensitive to colored liquids and the imaging effect is better.

[0052] Furthermore, the liquid capsule 41 has a receiving cavity 411, which is connected to a liquid column cavity 421. The imageable liquid can flow within the liquid column cavity 421. As the imageable liquid flows within the liquid column cavity 421, it can correspond to different scales. Furthermore, when the liquid column pressure sensor 4 is subjected to external pressure (e.g., pressure in the human digestive tract), the liquid capsule 41 can drive the imageable liquid to flow within the liquid column cavity 421. The scale corresponding to the imageable liquid during the flow process can represent the pressure applied to the liquid column pressure sensor 4.

[0053] The scale of the graduated liquid column 42 has a reference point, namely the zero point of the scale. When the imageable liquid points to the zero point scale, it indicates that the pressure exerted on the liquid column pressure sensor 4 is approximately zero. When the imageable liquid points to a scale greater than zero, it indicates that the liquid column pressure sensor 4 is subjected to external pressure (for example, pressure from the human digestive tract), and the larger the scale value that the imageable liquid points to, the greater the external pressure exerted on the liquid column pressure sensor 4.

[0054] More specifically, when the pressure applied to the liquid column pressure sensor 4 is close to zero, the imageable liquid is completely contained within the accommodating chamber 411 and fills the accommodating chamber 411. At this point, the imageable liquid points to the zero point on the scale. When the liquid column pressure sensor 4 is subjected to a pressure greater than zero, this pressure acts on the liquid capsule 41. Under this pressure, the accommodating chamber 411 deforms inwardly. During this deformation, the imageable liquid in the accommodating chamber 411 is squeezed into the liquid column chamber 421, thereby allowing the imageable liquid to point to a scale greater than zero. The greater the pressure, the more imageable liquid enters the liquid column chamber 421, and the larger the scale.

[0055] Of course, the position of the scale in the liquid column cavity 421 can also be adjusted according to the flow rate of the imageable liquid inside the liquid column pressure sensor 4. In order to ensure that the liquid column pressure sensor 4 has a high measurement accuracy, the imageable liquid in its inner cavity can at least fill the accommodating cavity 411.

[0056] Furthermore, the measurement sensitivity of the liquid column pressure sensor 4 can be adjusted by varying the cross-sectional area of ​​the liquid column cavity 421. A smaller cross-sectional area of ​​the liquid column cavity 421 results in higher sensitivity and higher accuracy. Furthermore, the measuring range of the liquid column pressure sensor 4 can be adjusted by varying the length of the liquid column cavity 421 along the flow direction of the imageable liquid (the length of the graduated liquid column 42). A longer length of the graduated liquid column 42 results in a greater measuring range.

[0057] In one embodiment, Figure 4 、 Figure 5 As shown, the liquid capsule 41 includes a pressure-sensitive membrane 44, which encloses a receiving cavity 411. The pressure-sensitive membrane 44 can be made of one or more of a polyester film and a polyamide film. When subjected to external pressure, the pressure-sensitive membrane 44 can deform toward the interior of the receiving cavity 411. When the pressure disappears, the pressure-sensitive membrane 44 can return to its original state. Therefore, the receiving cavity 411 formed by the pressure-sensitive membrane 44 makes the liquid column pressure sensor 4 highly sensitive and capable of multiple measurements.

[0058] Specifically, the above-mentioned accommodating cavity 411 can be completely surrounded by the pressure-sensitive film 44, such as Figure 4 and Figure 5 As shown, the accommodating cavity 411 may also include multiple pressure-sensitive films 44, and each pressure-sensitive film 44 is connected by an adhesive 45, wherein the adhesive 45 may be one or more of acrylates and epoxies.

[0059] In one embodiment, both the liquid capsule 41 and the graduated liquid column 42 include a pressure-sensitive membrane 44, which encloses a receiving cavity 411 and a liquid column cavity 421. The cross-sectional area of ​​the receiving cavity 411 is larger than that of the liquid column cavity 421, and is 2 to 10 times greater than that of the liquid column cavity 421. The pressure-sensitive membrane 44 can be made of one or more of a polyester film and a polyamide film. When the liquid capsule 41 and the graduated liquid column 42 are subjected to force, the receiving cavity 411 deforms, while the deformation of the liquid column cavity 421 is minimal, thereby ensuring that the liquid column pressure sensor 4 has high sensitivity and measurement accuracy.

[0060] Of course, to prevent deformation of the liquid column cavity 421 under load, which could affect measurement accuracy, the graduated liquid column 42 could also be configured as a structure with high strength and rigidity, making it less susceptible to deformation under load. However, in this embodiment, the integrated structure of the liquid capsule 41 and graduated liquid column 42 offers the advantages of simple structure and ease of processing. Furthermore, when the liquid column pressure sensor 4 is used in the capsule-type pressure measurement device 100, the less rigid pressure-sensitive membrane 44 poses less harm to the human body and has higher biocompatibility with the human body, thereby improving the safety of the liquid column pressure sensor 4.

[0061] In one embodiment, Figure 6 As shown, the liquid capsule 41 includes a gas chamber 412 and a liquid chamber 413, separated by a drive plate 43. The volumes of the gas chamber 412 and the liquid chamber 413 are adjusted by the movement of the drive plate 43. Liquid chamber 413 contains an imageable liquid. The imageable liquid in liquid chamber 413 can flow into liquid column chamber 421, and the imageable liquid in liquid column chamber 421 can also flow into liquid chamber 413. The imageable liquid can be one or more of methylene blue, betalain, and vitamin B. Methylene blue dissolves in water to form a blue solution, betalain dissolves in water to form a red solution, and vitamin B dissolves in water to form a yellow solution. Therefore, all three substances can enhance the recognizability of the imageable liquid within liquid column chamber 421. To avoid color variations similar to those found in the human body, methylene blue is preferred. Furthermore, the scale of the graduated liquid column 42 can be white, making it easier to distinguish from the imageable liquid.

[0062] Furthermore, the capsule-type pressure measurement device 100 may include multiple liquid column pressure sensors 4, each with a different range. In this case, multiple liquid column pressure sensors 4 with different ranges can meet the measurement requirements of different pressure ranges, thereby improving the accuracy of the test results. Furthermore, when the capsule-type pressure measurement device 100 includes multiple liquid column pressure sensors 4, it can avoid the inability to perform pressure measurements or inaccurate measurement results due to failure of a liquid column pressure sensor 4. The multiple liquid column pressure sensors 4 may also be of different types.

[0063] Furthermore, both the rear shell 11 and the front shell 12 are provided with a cylindrical surface 10. In the present embodiment, the liquid column pressure sensor 4 is attached to the cylindrical surface 10 of the front shell 12. In other embodiments, the liquid column pressure sensor 4 may also be attached to the cylindrical surface 10 of the rear shell, or the liquid column pressure sensor 4 may also be attached to the end of the rear shell 11 or the front shell 12, or may be attached to both the rear shell 11 and the front shell 12. For example, two liquid column pressure sensors 4 are attached to the cylindrical surfaces 10 of the rear shell 11 and the front shell 12, respectively. The types and ranges of the two liquid column pressure sensors 4 may be the same or different. Regardless of where the liquid column pressure sensor 4 is attached, it is necessary to enable the camera to capture the image of the scaled liquid column 42 while minimizing the impact on the main image. For example, the liquid column pressure sensor 4 is attached to the edge of the viewing angle of the image acquisition component 3, similar to observation with the peripheral vision of the eye. The main viewing angle is mainly used to observe the image of the object to be inspected. When a certain characteristic position of the object to be inspected is observed, the pressure sensor reading can be observed, or the pressure data can be recorded through the image all the time and compared with the image of the object to be inspected later, that is, the relationship between the position of the object to be inspected and the pressure can be observed.

[0064] In one embodiment, Figure 7 As shown, the camera 31 has an effective imaging angle α1, and the capsule shell 1 includes a transparent portion that can cover the space where the effective imaging angle α1 is located; therefore, the field of view of the camera 31 is not blocked. Figure 7 As shown, the image sensor 32 has a display image angle α2, and the transparent portion of the capsule shell 1 can also cover the space where the display image angle α2 is located. Therefore, the imaging area of ​​the image sensor 32 is not blocked.

[0065] At the same time, after the camera 31 and the image sensor 32 are installed, α1>α2 is satisfied. That is, although the camera 31 can capture images within the range corresponding to α1, and the range corresponding to α1 has an effective imaging angle boundary D1, the image sensor 32 can display the image within the range corresponding to α2, and the range corresponding to α2 has a display image angle boundary D2. For example, the effective imaging angle α1 can be 140°, and the display image angle α2 can be 135°.

[0066] Based on this, in one embodiment, Figure 8 As shown, the above-mentioned liquid column pressure sensor 4 is installed in the transparent part of the capsule shell 1 and is located in the space between the effective imaging angle α1 and the display image angle α2, that is, the liquid column pressure sensor 4 is located between the effective imaging angle boundary D1 and the display image angle boundary D2, and a plurality of liquid column pressure sensors 4 can be included between the effective imaging angle boundary D1 and the display image angle boundary D2, and the liquid column pressure sensors 4 can be of the same type or of different types.

[0067] In another embodiment, Figure 9 As shown, the liquid column pressure sensor 4 is mounted on the transparent portion of the capsule shell 1 and is located in the space occupied by the display image angle α2. That is, the liquid column pressure sensor 4 is located within and close to the display image angle boundary D2. This prevents the liquid column pressure sensor 4 from occupying the middle of the display image range and reduces the obstruction of the image by the liquid column pressure sensor 4. At this time, the pressure liquid column pressure sensor 4 is located within the imaging area of ​​the image sensor 32. The image sensor 32 transmits the scale information of the liquid column pressure sensor 4 to an external receiving device, allowing the user to observe the scale of the liquid column pressure sensor 4. This scale information can also be transmitted to the external receiving device via the antenna 21.

[0068] When measuring the pressure of a human body, the direct muscle pressure of the body's walls at different locations, as well as the gas and liquid pressures within the body's cavity, act on the bladder 41, compressing it and causing the imageable liquid to overflow into the graduated liquid column 42. The amount of overflow varies depending on the pressure, and the liquid level settles at different scale positions on the graduated liquid column 42. The camera 31 then captures the current level of the graduated liquid column 42. The image sensor 32 converts the image light signal into an electrical signal, which is then transmitted to the data acquisition and processing module 22 for processing. Finally, the signal is wirelessly transmitted via the antenna 21 to an external device for analysis, resulting in the pressure measurement of the human body.

[0069] like Figure 10 、 Figure 11 As shown, the capsule also includes a rear cap 5 and a gas release source, which can output gas and thereby generate a corresponding force. In this embodiment, the gas release source is a needle tube 6. In other embodiments, the gas release source can also be a structure such as an insufflation pump with an outlet. The two ends of the rear cap 5 are connected to the needle tube 6 and the capsule shell 1, respectively. Specifically, the rear cap 5 includes a suction cup 51 and a vent tube 52. One end of the vent tube 52 is connected to the outlet of the needle tube 6, allowing gas output from the needle tube 6 to enter the vent tube 52. The other end of the vent tube 52 is connected to the suction cup 51, which is used for suction connection with the capsule shell 1. The vent tube 52 can be a flexible tube made of a non-toxic, stable material, such as biocompatible silicone, to ensure its safety. In addition, the outer diameter of the vent tube 52 can be set to 0.5 mm to 1.5 mm to ensure that the vent tube 52 does not cause an excessively strong foreign body sensation and does not cut the esophagus.

[0070] During operation, suction cup 51 is attached to rear shell 11 of capsule housing 1 by suction. After a person swallows the capsule pressure measuring device, with rear cap 5 attached, the tension on capsule housing 1 is adjusted via vent tube 52 based on the speed at which capsule housing 1 descends through the esophagus. This allows for repeated and fixed-point measurements in this rapidly descending esophagus. After the inspection is complete, the piston rod of needle 6 is pushed forward, causing suction cup 51 to fill with gas and automatically detach from capsule housing 1.

[0071] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A capsule-type pressure measuring device, characterized in that: The device comprises a capsule shell image acquisition component and a liquid column pressure sensor, wherein the image acquisition component is disposed inside the capsule shell, and the liquid column pressure sensor is attached to the outer surface of the capsule shell. The image acquisition component can acquire an image of the liquid column pressure sensor and thereby read a pressure value of the liquid column pressure sensor. The image acquisition component includes a camera and an image sensor, the camera has an effective imaging angle α1, and the capsule shell includes a transparent portion, and the transparent portion can cover the space where the effective imaging angle α1 is located; The image sensor has a display image angle α2, the transparent portion can cover the space where the display image angle α2 is located, and α1>α2; The liquid column pressure sensor is mounted on the outer wall of the capsule shell and is located in the space between the effective imaging angle α1 and the display image angle α2.

2. The capsule pressure measuring device according to claim 1, characterized in that: The capsule shell includes a cylindrical surface, and the liquid column pressure sensor is attached to the cylindrical surface of the capsule shell.

3. The capsule pressure measuring device according to claim 1, characterized in that: The liquid column pressure sensor comprises a liquid capsule, an imageable liquid and a scaled liquid column. The liquid capsule and the scaled liquid column are in communication, and the imageable liquid is disposed in the liquid capsule.

4. The capsule pressure measuring device according to claim 3, characterized in that: The liquid capsule has a receiving cavity, the graduated liquid column has a liquid column cavity, the receiving cavity and the liquid column cavity are in communication, and the imageable liquid is disposed in the receiving cavity; When the liquid capsule is pressurized, the accommodating cavity can be deformed, and the imageable liquid in the accommodating cavity can be pressed into the liquid column cavity. When the imageable liquid flows in the liquid column cavity, it can correspond to different scales.

5. The capsule pressure measuring device according to claim 4, characterized in that: The liquid capsule includes a pressure-sensitive membrane, and the pressure-sensitive membrane surrounds the accommodating cavity; When subjected to pressure, the pressure-sensitive membrane can be deformed toward the interior of the accommodation cavity, and when the pressure disappears, the pressure-sensitive membrane can return to its original state.

6. The capsule pressure measuring device according to claim 4, characterized in that: The liquid capsule and the graduated liquid column both include a pressure-sensitive membrane, and the pressure-sensitive membrane encloses the accommodating cavity and the liquid column cavity; The cross-sectional area of ​​the accommodating cavity is larger than the cross-sectional area of ​​the liquid column cavity.

7. The capsule pressure measuring device according to claim 4, characterized in that: The liquid capsule includes a gas cavity and a liquid cavity, wherein the gas cavity and the liquid cavity are separated by a driving plate, and the volumes of the gas cavity and the liquid cavity are adjusted by movement of the driving plate; The liquid cavity contains the imageable liquid. The imageable liquid in the liquid cavity can enter the liquid column cavity, and the imageable liquid in the liquid column cavity can also enter the liquid cavity.

8. The capsule pressure measuring device according to any one of claims 3 to 7, characterized in that: The imageable liquid is one or more of methylene blue, beetroot red, and vitamin B.

9. The capsule pressure measuring device according to claim 3, characterized in that: The capsule pressure measuring device also includes a data transmission component, the image sensor is connected to the camera and the data transmission component respectively, the capsule shell includes a rear shell and a front shell, the rear shell and the front shell are cooperatively connected to form a cavity, the data transmission component, the image sensor and the camera are respectively arranged in the cavity, the front shell is set to be transparent, and the camera is arranged at one end close to the front shell, and the liquid column pressure sensor is attached to the cylindrical surface of the front shell or the end of the front shell.

10. The capsule pressure measuring device according to claim 3, characterized in that: The capsule-type pressure measuring device also includes a data transmission component, the image sensor is connected to the camera and the data transmission component respectively, the capsule shell includes a rear shell and a front shell, the rear shell and the front shell are cooperatively connected to form a cavity, the data transmission component, the image sensor and the camera are respectively arranged in the cavity, the front shell and the rear shell are both set to be transparent, and cameras are arranged near both ends of the front shell and the rear shell, the liquid column pressure sensor is attached to the cylindrical surface of the front shell, the cylindrical surface of the rear shell, the end of the front shell or the end of the rear shell, or the liquid column pressure sensor is attached to the rear shell and the front shell at the same time.

11. The capsule pressure measuring device according to claim 1, characterized in that: The capsule pressure measuring device further includes a plurality of liquid column pressure sensors, and the ranges and types of the liquid column pressure sensors are the same or different.

12. The capsule pressure measuring device according to claim 3, characterized in that: The liquid sac and the scaled liquid column are respectively made of biocompatible materials.

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