Liquid collection capsule, liquid collection system and capsule liquid collection method

Abstract

The present application provides a liquid collection capsule and a liquid collection system having the same, the capsule comprising a capsule shell, a wireless transmission module, a trigger device and a processing module, the wireless transmission module, the trigger device and the processing module are all arranged in the capsule shell. The capsule shell forms a first accommodating portion, a liquid inlet is formed on the side wall of the first accommodating portion, and a sealing spring is sealed on the liquid inlet. The wireless transmission module receives an external liquid collection command and transmits the command to the processing module, the processing module controls the trigger device to perform a liquid collection operation according to the liquid collection command, the trigger device reduces the air pressure in the first accommodating portion so that a pressure difference is formed between the first accommodating portion and the external environment, and the air pressure difference pushes the sealing spring to open the liquid inlet, so that the first accommodating portion is connected to the cavity environment. The capsule can perform liquid collection operations in the cavity relatively easily and accurately.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, in particular to a liquid collection capsule, a liquid collection system and a capsule liquid collection method. Background Art

[0002] Gastrointestinal diseases are common diseases. When diagnosing and treating gastrointestinal diseases, it is sometimes necessary to remove the fluid in the stomach and intestines for analysis in order to determine the diagnosis and treatment plan. In the prior art, a catheter endoscope is generally inserted into the body of the subject to extract gastrointestinal fluid or gastrointestinal tissue. Since it is difficult to insert the catheter endoscope into the subject's body for operation, higher requirements are placed on the operator. If this method is not used properly, it may cause severe discomfort to the subject, causing physiological reactions in the subject, which in turn affects the sampling operation. In addition, the catheter endoscope cannot reach deeper parts such as the small intestine, which greatly limits the detection of diseases. Summary of the invention

[0003] The object of the present invention is to provide a liquid collection capsule and a liquid collection system having the same, wherein the liquid collection capsule can enter a cavity in the form of a capsule, and after reaching a predetermined position in the cavity, liquid collection operations can be performed at the position more easily and accurately.

[0004] The present invention provides a liquid taking capsule, comprising a capsule shell, a wireless transmission module, a trigger device and a processing module, wherein the wireless transmission module, the trigger device and the processing module are all arranged in the capsule shell, the capsule shell forms a first accommodating portion, a liquid inlet is formed on the side wall of the first accommodating portion, and a sealing spring is sealed at the liquid inlet, the wireless transmission module receives an external liquid taking command and transmits the command to the processing module, the processing module controls the trigger device to perform a liquid taking operation according to the liquid taking command, the trigger device reduces the air pressure in the first accommodating portion so that a pressure difference is formed between the first accommodating portion and the cavity environment, and the pressure difference pushes the sealing spring to open the liquid inlet, so that the first accommodating portion is connected to the cavity environment.

[0005] Furthermore, the capsule shell is also formed with a second accommodating part, and a diaphragm is arranged between the first accommodating part and the second accommodating part, and the diaphragm separates the first accommodating part and the second accommodating part; when liquid is not taken, the air pressure in the second accommodating part and the average air pressure of the first accommodating part and the second accommodating part are both lower than the air pressure in the cavity, and after receiving the liquid taking command, the trigger device connects the second accommodating part and the first accommodating part so that the pressure in the first accommodating part is lower than the pressure of the cavity environment.

[0006] Furthermore, the trigger device includes a fixed seat, a heated and melted solid hot melt, a heating wire and an elastic member; the solid hot melt is arranged in the fixed seat, and the heating wire is electrically connected to the processing module; the elastic member is sealed in the solid hot melt, and the elastic member is in a compressed state, and the elastic recovery direction of the elastic member is set toward the diaphragm; a needle body is arranged at one end of the elastic member facing the diaphragm, and when the processing module receives a liquid extraction command, it controls the heating wire to heat the solid hot melt, and after the solid hot melt is melted, the elastic member recovers and drives the needle body to pierce the diaphragm, so that the first accommodating part is connected with the second accommodating part.

[0007] Furthermore, the trigger device includes a solid hot melt that is heated and melted and a heating wire in contact with the solid hot melt. The diaphragm is provided with a connecting hole connecting the first receiving portion and the second receiving portion. The solid hot melt is sealed in the connecting hole. The heating wire is electrically connected to the processing module. After receiving a liquid extraction command, the processing module controls the heating wire to heat the solid hot melt, and the solid hot melt melts, so that the first receiving portion is connected with the second receiving portion.

[0008] Furthermore, a second accommodating portion is formed in the capsule shell, a diaphragm is arranged between the first accommodating portion and the second accommodating portion, the trigger device includes a fixed seat, a heated and melted solid hot melt, a heating wire and an elastic member, the solid hot melt is arranged in the fixed seat, the heating wire is electrically connected to the processing module, the elastic member is in a deformed state and is sealed in the solid hot melt, when the processing module receives a liquid extraction command, the heating wire is controlled to heat the solid hot melt, after the solid hot melt is melted, the elastic member recovers and drives the diaphragm to expand the volume in the first accommodating portion.

[0009] Furthermore, the trigger device is disposed in the first accommodating portion, and the elastic member is in a compressed state and is sealed in the solid hot melt.

[0010] Furthermore, the trigger device is disposed in the second accommodating portion, the elastic member is connected to the diaphragm, and the elastic member is in a stretched state and is sealed in the solid hot melt.

[0011] Furthermore, the melting point of the solid hot melt is 45°C-55°C.

[0012] Furthermore, the solid hot melt is paraffin.

[0013] Furthermore, the position detection module is an optical imaging system, and a transparent layer is formed on the capsule shell at a portion corresponding to a lens of the optical imaging system.

[0014] Furthermore, the liquid inlet is located outside the shooting angle of the lens.

[0015] Furthermore, a liquid absorption device is also arranged in the first receiving portion.

[0016] A liquid collection system comprises the above-mentioned liquid collection capsule and a control module, wherein the control module receives a position signal sent by the liquid collection capsule and sends a liquid collection command to the liquid collection capsule.

[0017] A capsule liquid collection method, when the liquid collection capsule reaches the liquid collection position, the control module sends a liquid collection command to the liquid collection capsule;

[0018] The wireless transmission module of the liquid collection capsule receives the liquid collection command and sends the liquid collection command to the processing module;

[0019] The processing module controls the trigger device to reduce the air pressure of the first containing part until the air pressure of the first containing part is less than the pressure of the cavity environment, thereby forming a pressure difference;

[0020] The sealing elastic sheet is separated from the liquid inlet under the action of the pressure difference to open the liquid inlet, so that the first accommodation portion is connected with the cavity environment through the liquid inlet.

[0021] In summary, in the present invention, by setting the trigger device, a pressure difference is formed inside and outside the first accommodating part, so that the sealing spring opens the liquid inlet, and liquid can be taken. After the liquid is taken, since there is no pressure difference or the pressure difference is reduced, the sealing spring closes the liquid inlet again to prevent the external liquid from entering again. After the liquid-taking capsule reaches a predetermined position in the cavity, it can easily and accurately take liquid from that position.

[0022] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic cross-sectional structural diagram of a liquid extraction capsule provided in the first embodiment of the present invention.

[0024] Figure 2 This is a system block diagram of the liquid extraction capsule provided in the first embodiment of the present invention.

[0025] Figure 3 FIG. 1 is a schematic structural diagram of a liquid collection capsule trigger device and a diaphragm provided in a second embodiment of the present invention.

[0026] Figure 4 FIG. 1 is a schematic structural diagram of a liquid collection capsule trigger device and a diaphragm provided in a third embodiment of the present invention.

[0027] Figure 5 A system block diagram of a liquid extraction system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the present invention is described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0029] The object of the present invention is to provide a liquid collection capsule and a liquid collection system having the same, wherein the liquid collection capsule enters a cavity and performs a liquid collection operation at a liquid collection position. The cavity is a closed space with a certain pressure, and the cavity contains a fluid (liquid and / or gas). The environment in the cavity (i.e., the cavity environment) can be a gas environment or a liquid environment. After the liquid collection capsule enters the cavity, when it is in a gas environment or in a liquid environment but no liquid is collected, under the combined action of the internal pressure of the liquid collection capsule, the preload force of the sealing shrapnel 112, and the cavity environment pressure, the sealing shrapnel 112 seals the liquid inlet 111 to prevent liquid and / or gas from entering the liquid collection capsule. After the liquid collection capsule moves to the liquid collection position, it is in a liquid environment and performs a liquid collection operation. Under the combined action of the internal pressure of the liquid collection capsule, the preload force of the sealing shrapnel 112, and the cavity environment pressure, the sealing shrapnel 112 separates from the liquid inlet 111, thereby allowing liquid to enter the liquid collection capsule. After the liquid collection capsule completes the liquid collection operation, the cavity environment may be a liquid environment or a gas environment, but under the combined effect of the internal pressure of the liquid collection capsule, the preload force of the sealing spring 112, and the cavity environment pressure, the sealing spring 112 reseals the liquid inlet 111, thereby effectively preventing liquid and / or gas from entering the liquid collection capsule.

[0030] Figure 1 This is a schematic cross-sectional view of the liquid extraction capsule provided in the first embodiment of the present invention. Figure 2 This is a system block diagram of the liquid collection capsule provided by the first embodiment of the present invention. Figure 1 and Figure 2As shown, the liquid collection capsule provided by the present invention includes a capsule shell 10, a wireless transmission module 30, a trigger device 40 and a processing module 50, and the wireless transmission module 30, the trigger device 40 and the processing module 50 are all arranged in the capsule shell 10. The capsule shell 10 is formed with a first accommodating portion 11, and a liquid inlet 111 is formed on the side wall of the first accommodating portion 11. In this embodiment, the liquid inlet 111 is formed on the capsule shell 10, and a sealing elastic sheet 112 is sealed at the liquid inlet 111, and the sealing elastic sheet 112 is arranged on the inner side of the capsule shell 10. The wireless transmission module 30 receives an external liquid collection command and transmits the liquid collection command to the processing module 50. The processing module 50 controls the trigger device 40 to perform the liquid collection operation according to the liquid collection command. The trigger device 40 reduces the air pressure in the first accommodating portion 11 so that a pressure difference is formed between the first accommodating portion 11 and the environment outside the cavity. The force of the pressure difference on the sealing spring 112 and the pre-tightening force of the sealing spring 112 work together to push the sealing spring 112 open, thereby opening the liquid inlet 111, so that the liquid in the cavity enters the first receiving portion 11, and the internal liquid is taken out. The wireless transmission module 30 and the processing module 50 can be integrated on the same circuit board 70, or they can be separately arranged on different circuit boards.

[0031] It is worth mentioning that in the embodiment of the present application, electrical components such as the position detection module 20, the wireless transmission module 30, the trigger device 40 and the processing module 50 are arranged in the capsule shell 10. In order to ensure that the electrical components in the liquid collection capsule work normally after the liquid collection is completed, the electrical components in the capsule shell 10 can be insulated, so that each electrical component can work normally in an environment with liquid. Among them, the insulation treatment can be Parylene treatment, that is, a thin film or coating is formed on the surface of the electrical component to protect the electrical component.

[0032] In this embodiment, before liquid extraction begins, the presence of the sealing elastic sheet 112 prevents liquid and / or gas in the cavity environment from entering the first accommodating portion 11. Specifically, the sealing elastic sheet 112 has a pre-tightening force from the first accommodating portion 11 toward the liquid inlet 111, and the sum of the pre-tightening force of the sealing elastic sheet 112 and the pressure in the first accommodating portion 11 (the force acting on the sealing elastic sheet 112) will not be lower than the force applied to the sealing elastic sheet 112 by the external air pressure, and the sealing elastic sheet 112 will be tightly attached to the side wall of the capsule shell 10 around the liquid inlet 111, thereby forming a seal at the liquid inlet 111.

[0033] When the liquid collection capsule reaches the liquid collection position (which can be a predetermined position calculated based on time, or a precise position observed in real time), the external control module will send a liquid collection command to the liquid collection capsule through the wireless transmission module 30. The processing module 10 will reduce the air pressure in the first accommodating portion 11 through the trigger device 40, so that the pressure in the first accommodating portion 11 is less than the external pressure. At this time, a pressure difference is formed inside and outside the first accommodating portion 11, and the pressure difference can produce a compressive force on the sealing spring 112, so that the sealing spring 112 is separated from the liquid inlet 111, and the liquid in the cavity can enter the first accommodating portion 11. As the liquid enters the first accommodating portion 11, the pressure difference between the inside and outside of the first accommodating portion 11 gradually decreases. When the force of the pressure difference acting on the sealing spring 112 is less than the pre-tightening force of the sealing spring 112 itself, the sealing spring 112 can close the liquid inlet 111 again.

[0034] During the process of the liquid capsule being discharged from the cavity (after the liquid collection is completed), the sealing spring 112 will resist the pressure of the cavity environment through its own pre-tightening force, and then keep the liquid inlet 111 airtight. After the liquid capsule moves to other positions, the liquid at other positions will no longer enter the liquid capsule, preventing the liquids at different positions from mixing. That is, after the liquid capsule reaches a predetermined position in the cavity, it can easily and accurately perform liquid collection operations at that position. It should be noted that in this embodiment, the cavity environment can be a gas environment, a liquid environment, etc.

[0035] Furthermore, the capsule housing 10 is further formed with a second accommodating portion 12, and a diaphragm 13 is formed between the second accommodating portion 12 and the first accommodating portion 11. The diaphragm 13 is used to separate the first accommodating portion 12 from the second accommodating portion 11. In this embodiment, the edge of the diaphragm 13 is fixedly connected to the inner wall of the capsule housing 10, and the diaphragm 13 can prevent the air in the first accommodating portion 11 from communicating with the air in the second accommodating portion 12.

[0036] When the liquid collection operation is not performed, the air pressure of the second receiving part 12 is lower than the pressure of the cavity environment, and the average air pressure of the second receiving part 12 and the first receiving part 11 (i.e., the air pressure after the second receiving part 12 and the first receiving part 11 are connected) is lower than the pressure of the cavity environment. After receiving the liquid collection command, the trigger device 40 connects the second receiving part 12 with the first receiving part 11, so that the air pressure in the first receiving part 11 and the second receiving part 12 (i.e., the entire capsule shell 10) is lower than the pressure of the cavity environment, thereby forming a pressure difference with the cavity environment of the capsule shell 10, pushing the sealing spring 112 to open the liquid inlet 111. In other words, the liquid in the cavity environment pushes the sealing spring 112, thereby connecting the first receiving part 11 with the cavity environment through the liquid inlet 111, and then the liquid can flow from the outside of the capsule shell 10 through the liquid inlet 111 into the first receiving part 11 under the action of pressure, thereby achieving the effect of collecting liquid.

[0037] That is, in this embodiment, the trigger device 40 balances the gas pressure in the first accommodating portion 11 and the second accommodating portion 12, so that the force applied to the sealing elastic sheet 112 in the capsule shell 10 is reduced. Preferably, when the liquid extraction operation is not performed, the gas pressure in the first accommodating portion 11 is greater than the pressure applied to the sealing elastic sheet 112 by the cavity environment, so as to ensure that the sealing elastic sheet 112 has a good sealing performance when the liquid extraction operation is not performed.

[0038] It is worth mentioning that in other embodiments of the present application, when the liquid extraction operation is not performed, the air pressure in the first receiving portion 11 can also be less than or equal to the pressure in the cavity. At this time, the sum of the pressure of the first receiving portion 11 acting on the sealing elastic sheet 112 and the pre-tightening force of the sealing elastic sheet 112 itself is greater than the pressure of the cavity environment acting on the sealing elastic sheet 112. Accordingly, it is ensured that the sealing elastic sheet 112 seals the first receiving portion 11 well when the liquid extraction operation is not performed.

[0039] A first through hole 14 and a second through hole 15 are formed on the side walls of the second accommodating portion 12 and the first accommodating portion 11, respectively, and sealing plugs (not shown) are provided in the first through hole 14 and the second through hole 15. In the liquid collection preparation stage, the air in the second accommodating portion 12 can be extracted through the second through hole 15, and at the same time, the first accommodating portion 11 can be pressurized through the first through hole 14 to meet the air pressure requirements in the second accommodating portion 12 and the first accommodating portion 11, and then the first through hole 14 and the second through hole 15 are sealed by the sealing plug. In some embodiments, gas is pre-stored in the first accommodating portion 11, including but not limited to air, nitrogen or rare gas inert gas, etc., which can adjust the pressure and do not harm the human body, and the second accommodating portion 12 can be pre-formed into a negative pressure state.

[0040] In addition, the liquid collection capsule of the present application is also provided with a magnetic member (not shown). Specifically, the magnetic member is provided in the capsule shell 10 and can be made of ferromagnetic materials such as rubidium magnets, and is used to drive the liquid collection capsule to move and change the posture of the liquid collection capsule under the control of an external magnet.

[0041] In the embodiment of the present application, the trigger device 40 includes a fixing seat 41, a solid hot melt 42 that can be melted after heating, a heating wire 43 and a trigger member, wherein the trigger member can act on the diaphragm 13 to change the pressure in the first accommodation portion 11. Preferably, in order to adapt to the narrow space structure such as a capsule, the trigger member can be an elastic member 44 with a simple structure and suitable for installation, such as an elastic member.

[0042] In one embodiment of the present application, the trigger member is an elastic member 44 with a needle body. Figure 1The trigger device 40 includes a fixing seat 41, a solid hot melt 42 that can be melted after heating, a heating wire 43 and an elastic member 44. The solid hot melt 42 is arranged in the fixing seat 41. The heating wire 43 contacts the solid hot melt 42, and preferably the heating wire 43 is at least partially sealed in the solid hot melt 42. The elastic member 44 is sealed in the solid hot melt 42, and the elastic member 44 is in a compressed state. The elastic recovery direction of the elastic member 44 is set toward the diaphragm 13 (or the elastic member 44 can contact the diaphragm 13 during the elastic recovery process), and a needle body (not shown in the figure) is arranged at one end of the elastic member 44 facing the diaphragm 13, and the heating wire 43 is electrically connected to the processing module 50. When the processing module 50 receives the liquid extraction command, it controls the heating wire 43 to heat the solid hot melt 42. After the solid hot melt 42 melts, the elastic member 44 recovers under the action of its own deformation, driving the needle body to pierce the diaphragm 13, so that the second accommodating part 12 is connected with the first accommodating part 11, so that the air pressure in the first accommodating part 11 is reduced. The needle body can be fixedly installed on one end of the elastic member 44 close to the diaphragm 13 through a connecting member, and the sharp end of the needle body faces the diaphragm 13. In other embodiments, the needle body can also be formed integrally with the elastic member 44.

[0043] In this embodiment, the trigger device 40 is disposed in the first accommodating portion 11. It can be understood that the trigger device 40 can also be disposed in the second accommodating portion 12. As long as the elastic member 44 can be released after the solid hot melt 42 melts, the elastic member 44 drives the needle body to pierce the diaphragm 13, so that the second accommodating portion 12 is connected to the first accommodating portion 11.

[0044] In this embodiment, the melting point of the solid hot melt 42 may be 45°C-55°C. Preferably, the solid hot melt 42 may be paraffin. It is worth mentioning that for the human body, the temperature safety threshold is 55°C-60°C, and temperatures below this range will not cause harm to the human body. In the present application, the melting point of the solid hot melt 42 meets the above requirements, so the liquid collection capsule provided in the present application has high safety and reliability.

[0045] Furthermore, in the present embodiment, the liquid collection capsule further includes a position detection module 20, which detects the real-time position of the liquid collection capsule and transmits the position signal to the processing module 50. The processing module 50 transmits the position signal through the wireless transmission module 30. The control module obtains the accurate position of the liquid collection capsule based on the signal. The position detection module 20 can be an optical imaging system, and a transparent layer is formed on the portion of the capsule shell 10 corresponding to the lens of the optical imaging system to ensure that the optical imaging system is not blocked. Preferably, in some embodiments, the above-mentioned liquid inlet 111 is located outside the shooting angle of view of the lens of the optical imaging system (not shown in the figure).

[0046] Further, see Figure 2 As shown, a power module 60 is also provided in the capsule housing 10 to supply power to the position detection module 20, the processing module 50, the trigger device 40 and the wireless transmission module 30. In this embodiment, the position detection module 20, the processing module 50 and the wireless transmission module 30 are provided in the first accommodation portion 11. It can be understood that the above modules can also be provided in the second accommodation portion 12.

[0047] In this embodiment, the liquid inlet 111 is further provided with a sealing member (not shown) to facilitate the sealing between the liquid inlet 111 and the sealing spring 112. In this embodiment, the sealing member can be a sealing sheet or a backflow prevention valve to prevent the liquid entering the first accommodating portion 11 from flowing back out of the first accommodating portion.

[0048] In this embodiment, a liquid absorption device (not shown), such as a sponge, is further provided in the first receiving portion 11, so as to facilitate the absorption and preservation of the liquid entering the first receiving portion 11. In some embodiments, the liquid absorption device can be filled in the first receiving portion 11. In other embodiments, a position detection module 20 or an image acquisition device (not shown) is provided in the capsule shell 10, and the liquid absorption device is provided outside the viewing angle of the position detection module 20 or the image acquisition device, so as to ensure the normal operation of the position detection module 20 or the image acquisition device.

[0049] Figure 3 FIG. 1 is a schematic structural diagram of a liquid collection capsule trigger device and a diaphragm provided in a second embodiment of the present invention. Figure 3 A schematic diagram of the structure when the solid hot melt 42 is not melted is shown. As a variation of the above embodiment, in a second embodiment of the present invention, a connecting hole 46 connecting the first accommodating portion 11 and the second accommodating portion 12 is provided on the diaphragm 13, and the solid hot melt 42 is sealed in the connecting hole 46. The heating wire 43 is in contact with the solid hot melt 42 and is connected to the processing module 50. When the processing module 50 receives a liquid extraction command, it controls the heating wire 43 to start heating to melt the solid hot melt 42 and connect the two sides of the diaphragm 13 to reduce the air pressure in the first accommodating portion 11, thereby allowing the liquid in the cavity environment to push the sealing spring 112 to enter the first accommodating portion 11. Figure 3 In the embodiment, the heating wire 43 is located on the side wall of the solid hot melt 42 facing the first accommodating portion 11; in another embodiment, the heating wire 43 can be arranged on the side wall of the solid hot melt 42 facing the second accommodating portion 12; in yet another embodiment, the heating wire 43 can also be arranged in the solid hot melt and electrically connected to the processing module 50 and / or the power module 60, which will not be repeated here.

[0050] Figure 4 FIG. 1 is a schematic structural diagram of a liquid collection capsule triggering device and a diaphragm 13 provided in a third embodiment of the present invention. Figure 4 FIG. 4 shows a schematic diagram of the structure after the solid hot melt 42 is melted and the elastic member 44 is restored. Figure 4 As shown, in the third embodiment of the present invention, similar to the first embodiment, the trigger device 40 also includes a fixing seat 41, a solid hot melt 42, a heating wire 43 and an elastic member 44 (i.e., a trigger member). The solid hot melt 42 is arranged in the fixing seat 41, the heating wire 43 contacts the solid hot melt 42, and the elastic member 44 is sealed in the solid hot melt 42. In this embodiment, the trigger device 40 is arranged in the first accommodating portion 11, at which time the elastic member 44 is in a compressed state, the elastic recovery direction of the elastic member 44 is arranged toward the diaphragm 13, and the heating wire 43 is electrically connected to the processing module 50. The difference is that when the processing module 50 receives the liquid extraction command, the heating wire 43 is controlled to heat the solid hot melt 42 to release the elastic member 44, and the elastic member 44 pushes the diaphragm 13 to move toward the second accommodating portion 12 to increase the volume of the first accommodating portion 11. In this embodiment, the diaphragm 13 is an elastic component and can be deformed under the action of the elastic member 44 to adjust the volumes of the first accommodation portion 11 and the second accommodation portion 12 , thereby changing the air pressure in the first accommodation portion 11 .

[0051] In this embodiment, since the volume of the first accommodating portion 11 increases, when the first accommodating portion 11 is sealed, the air pressure in the first accommodating portion 11 will decrease to form a pressure difference with the cavity environment.

[0052] It can be understood that in this embodiment, the air pressure in the second accommodation portion 12 may no longer be limited.

[0053] In the third embodiment, the trigger device 40 is located in the first accommodating portion 11 . In order to enable the diaphragm 13 to move toward the second accommodating portion 12 , the elastic member 44 needs to extend from a compressed state. Therefore, the elastic member 44 needs to be in a compressed state in the solid hot melt 42 .

[0054] As a variation of the above embodiment, the trigger device 40 can be located in the second accommodating portion 12. In this case, the end of the elastic member 44 needs to be connected to the diaphragm 13, and the elastic member 44 needs to be in a stretched state in the solid hot melt 42. After the solid hot melt 42 melts, the elastic member 44 is released and the elastic member 44 recovers to pull the diaphragm 13 to move toward the second accommodating portion 12.

[0055] In other embodiments of the present application, the diaphragm 13 may also be a piston that slides along the inner wall of the capsule housing 10. Furthermore, a sealing ring or the like is provided between the piston and the capsule housing 10 to prevent the gas in the first accommodation portion 11 from flowing into the second accommodation portion 12. The triggering member may be an elastic member 44 that is connected to the diaphragm 13 and controls the diaphragm 13 to stop or move.

[0056] In summary, in the present invention, by setting the trigger device 40, a pressure difference is formed inside and outside the first accommodating portion 11, so that the sealing spring 112 opens the liquid inlet 111, and liquid can be taken out. After the liquid is taken out, since there is no air pressure difference or the air pressure difference is reduced, the sealing spring 112 can close the liquid inlet 111 again to prevent the liquid in the cavity from entering again. After the liquid taking capsule reaches a predetermined position in the cavity, it can easily and accurately take out liquid at that position.

[0057] Figure 5 The system block diagram of the liquid extraction system provided by the embodiment of the present invention is shown in FIG. Figure 5 As shown, the present invention also provides a liquid collection system, which includes the above-mentioned liquid collection capsule and a control module 80. The control module 80 receives a position signal sent by the wireless transmission module 30 in the liquid collection capsule, and sends a liquid collection command to the wireless transmission module 30 of the liquid collection capsule to enable the liquid collection capsule to complete liquid collection.

[0058] The present invention also provides a liquid collection method. The method comprises: after determining that the liquid collection capsule reaches the liquid collection position in the cavity, the control module sends a liquid collection command to the liquid collection capsule;

[0059] The wireless transmission module of the liquid collection capsule receives the liquid collection command and sends the liquid collection command to the processing module;

[0060] The processing module controls the trigger device to reduce the air pressure of the first accommodation part until the air pressure of the first accommodation part is less than the pressure of the cavity environment, thereby forming a pressure difference between the inside and outside of the first accommodation part;

[0061] The sealing spring is separated from the liquid inlet under the action of the pressure difference to open the liquid inlet, so that the first accommodating portion is connected with the cavity environment through the liquid inlet.

[0062] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A liquid extraction capsule, characterized in that: The invention comprises a capsule shell, a wireless transmission module, a trigger device and a processing module, wherein the wireless transmission module, the trigger device and the processing module are all arranged in the capsule shell, a first accommodating portion is formed in the capsule shell, a liquid inlet is formed on the side wall of the first accommodating portion, a sealing spring is sealed at the liquid inlet, the wireless transmission module receives an external liquid taking command and transmits the command to the processing module, the processing module controls the trigger device to perform a liquid taking operation according to the liquid taking command, the trigger device reduces the air pressure in the first accommodating portion so that a pressure difference is formed between the first accommodating portion and the cavity environment, and the pressure difference pushes the sealing spring The liquid inlet is opened to connect the first receiving part with the cavity environment; the capsule shell also forms a second receiving part, and a diaphragm is arranged between the first receiving part and the second receiving part, and the diaphragm separates the first receiving part and the second receiving part; when liquid is not taken, the sum of the pressure of the first receiving part acting on the sealing elastic sheet and the pre-tightening force of the sealing elastic sheet itself is greater than the pressure of the cavity environment acting on the sealing elastic sheet, and after receiving the liquid taking command, the trigger device connects the second receiving part and the first receiving part or adjusts the volume of the first receiving part and the second receiving part so that the pressure of the first receiving part is less than the pressure of the cavity environment.

2. The liquid collection capsule according to claim 1, characterized in that: When liquid is not being drawn, the air pressure in the second containing part and the average air pressure in the first containing part and the second containing part are both lower than the air pressure in the cavity. After receiving the liquid drawing command, the trigger device connects the second containing part and the first containing part so that the pressure in the first containing part is lower than the pressure in the cavity environment.

3. The liquid collection capsule according to claim 2, characterized in that: The trigger device includes a fixing seat, a heated and melted solid hot melt, a heating wire and an elastic member; the solid hot melt is arranged in the fixing seat, and the heating wire is electrically connected to the processing module; the elastic member is sealed in the solid hot melt, and the elastic member is in a compressed state, and the elastic recovery direction of the elastic member is arranged toward the diaphragm; a needle body is arranged at one end of the elastic member facing the diaphragm, and when the processing module receives a liquid extraction command, the heating wire is controlled to heat the solid hot melt, and after the solid hot melt is melted, the elastic member recovers and drives the needle body to pierce the diaphragm, so that the first accommodating part is connected with the second accommodating part.

4. The liquid collection capsule according to claim 2, characterized in that: The trigger device includes a solid hot melt that is heated and melted and a heating wire that contacts the solid hot melt. The diaphragm is provided with a connecting hole that connects the first receiving portion and the second receiving portion. The solid hot melt is sealed in the connecting hole. The heating wire is electrically connected to the processing module. After receiving a liquid extraction command, the processing module controls the heating wire to heat the solid hot melt, so that the solid hot melt melts and the first receiving portion is connected with the second receiving portion.

5. The liquid collection capsule according to claim 1, characterized in that: The trigger device includes a fixing seat, a heated and melted solid hot melt, a heating wire and an elastic member. The solid hot melt is arranged in the fixing seat, the heating wire is electrically connected to the processing module, and the elastic member is in a deformed state and sealed in the solid hot melt. When the processing module receives a liquid extraction command, the heating wire is controlled to heat the solid hot melt. After the solid hot melt is melted, the elastic member recovers and drives the diaphragm to expand the volume in the first accommodating portion.

6. The liquid collection capsule according to claim 5, characterized in that: The trigger device is disposed in the first accommodating portion, and the elastic member is in a compressed state and is sealed in the solid hot melt.

7. The liquid collection capsule according to claim 5, characterized in that: The trigger device is arranged in the second accommodating portion, the elastic member is connected to the diaphragm, and the elastic member is in a stretched state and is sealed in the solid hot melt.

8. The liquid collection capsule according to any one of claims 3 to 7, characterized in that: The melting point of the solid hot melt is 45°C-55°C.

9. The liquid collection capsule according to any one of claims 3 to 7, characterized in that: The solid hot melt is paraffin.

10. The liquid collection capsule according to claim 1, characterized in that: A position detection module is also provided in the liquid collection capsule. The position detection module is an optical imaging system. A transparent layer is formed on the capsule shell at a portion corresponding to the lens of the optical imaging system. The liquid inlet is located outside the shooting angle of the lens.

11. The liquid collection capsule according to claim 1 or 10, characterized in that: A liquid absorbing device is also arranged in the first receiving portion.

12. A liquid extraction system, characterized in that: It comprises the liquid collecting capsule according to any one of claims 1 to 11, and a control module, wherein the control module receives a position signal sent by the liquid collecting capsule and sends a liquid collecting command to the liquid collecting capsule.

13. A method for extracting liquid from a capsule, characterized in that: The liquid collection capsule according to any one of claims 1 to 11 reaches the liquid collection position, and the control module of the liquid collection capsule sends a liquid collection command to the liquid collection capsule; The wireless transmission module of the liquid collection capsule receives the liquid collection command and sends the liquid collection instruction to the processing module; The processing module controls the trigger device to reduce the air pressure of the first containing part until the air pressure of the first containing part is less than the pressure of the cavity environment, thereby forming a pressure difference; The sealing elastic sheet is separated from the liquid inlet under the action of the pressure difference to open the liquid inlet, so that the first accommodation portion is connected with the cavity environment through the liquid inlet.

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