Dual lumen in-line pressure sensor signal calibration device

Abstract

The present application relates to medical devices and physiological pressure analysis monitoring technical field, disclose a double cavity series pressure sensor signal calibration device, including device ontology, and integrated in the double cavity series structure, pressure transmission assembly, sealing assembly and calibration interface in device ontology;Double cavity series structure includes static reference cavity and dynamic calibration cavity which are connected in turn along the pressure transmission direction, static reference cavity and dynamic calibration cavity realize pressure conduction through the through connection channel;Pressure transmission assembly is arranged in the double cavity series structure, for generating stable reference pressure in static reference cavity, generating dynamic simulation pressure in dynamic calibration cavity and transmitting to calibration interface;Sealing assembly is arranged in the inner wall of static reference cavity, dynamic calibration cavity and connection channel, and calibration interface is arranged at the end of device ontology, for detachable docking with implantable pressure sensor.The device can consider static and dynamic pressure calibration requirements.

Description

Technical Field

[0001] This invention relates to the field of medical devices and physiological pressure analysis and monitoring technology, specifically to a dual-chamber series pressure sensor signal calibration device. Background Technology

[0002] In the biomedical field, implantable pressure sensors are widely used for the precise monitoring of physiological pressures such as intracranial pressure and arterial pressure. Their detection accuracy directly affects the accuracy of clinical diagnosis and treatment decisions. Therefore, signal calibration before the sensor leaves the factory and before clinical use is crucial.

[0003] Existing pressure sensor calibration devices generally only enable calibration in a single static or dynamic mode, requiring device switching to complete full-characteristic calibration, which is cumbersome and inefficient. Furthermore, the sealing structure and pressure transmission medium of existing devices are difficult to adapt to the biocompatibility requirements of implantable sensors, easily damaging the flexible coating on the sensor surface; and dynamic pressure simulation is prone to turbulence disturbances, failing to accurately reproduce the dynamic characteristics of human physiological pressure, leading to distorted calibration results.

[0004] Therefore, there is an urgent need for a new type of calibration device to address the shortcomings of existing technologies. Summary of the Invention

[0005] To solve or at least partially solve the above-mentioned technical problems, the present invention provides a dual-chamber series pressure sensor signal calibration device.

[0006] This invention provides a dual-cavity series pressure sensor signal calibration device, including a device body, and a dual-cavity series structure, a pressure transmission component, a sealing component, and a calibration interface integrated within the device body. The dual-cavity series structure includes a static reference cavity and a dynamic calibration cavity connected sequentially along the pressure transmission direction. The static reference cavity and the dynamic calibration cavity are pressure-conducting through a through-connection channel. The pressure transmission component is disposed within the dual-cavity series structure and is used to generate a stable reference pressure in the static reference cavity, generate a dynamic simulated pressure in the dynamic calibration cavity, and transmit it to the calibration interface. The sealing component is disposed on the inner wall of the static reference cavity, the dynamic calibration cavity, and the connecting channel. The calibration interface is disposed at the end of the device body for detachable docking with an implantable pressure sensor.

[0007] Optionally, the connecting channel of the dual-chamber series structure is provided with an on / off control component. The on / off control component includes a valve body and a drive component. The valve body is used to control the opening and closing of the connecting channel, and the drive component is driven to the valve body to drive the opening and closing action of the valve body.

[0008] Optionally, the static reference cavity includes a static cavity body, a reference pressure generating component, and a pressure stabilizing component; the reference pressure generating component is disposed at one end of the static cavity body and is used to input a stable pressure into the static reference cavity; the pressure stabilizing component is disposed inside the static cavity body and is a flexible diaphragm structure used to buffer pressure fluctuations to maintain pressure stability within the cavity.

[0009] Optionally, the dynamic calibration chamber includes a dynamic chamber body and a dynamic pressure driving component; the dynamic pressure driving component is disposed on the outside of the dynamic chamber body and is connected to the cavity wall of the dynamic chamber body for driving the pressure inside the dynamic chamber body to generate periodic or transient changes; the inner wall of the dynamic chamber body is provided with a pressure disturbance suppression structure, which is an array of annular bosses.

[0010] Optionally, the sealing assembly includes a multi-layer sealing structure, which includes an inner flexible sealing layer and an outer rigid support sealing layer; the flexible sealing layer is tightly fitted to the cavity wall of the dual-cavity series structure, and the rigid support sealing layer is wrapped around the outside of the flexible sealing layer to provide structural support for the flexible sealing layer; the flexible sealing layer is made of medical-grade elastic sealing material.

[0011] Optionally, the calibration interface includes an interface base, a positioning structure, and a flexible sealing gasket; the positioning structure is disposed inside the interface base for circumferential positioning of the implantable pressure sensor; the flexible sealing gasket is disposed around the inside of the positioning structure, and the inner contour of the flexible sealing gasket is adapted to the outer contour of the housing of the implantable pressure sensor for achieving a sealed connection between the calibration interface and the implantable pressure sensor.

[0012] Optionally, it also includes a data acquisition and feedback component, which includes a standard pressure sensor and a signal acquisition module; the standard pressure sensor is respectively disposed in the static reference cavity and the dynamic calibration cavity, and is used to acquire the actual pressure signal in the cavity; the signal acquisition module is electrically connected to the standard pressure sensor, and the signal acquisition module has a reserved signal interface for connection with the implanted pressure sensor being calibrated.

[0013] Optionally, the device body also integrates a control component, which is electrically connected to the pressure transmission component, the on / off control component, and the data acquisition and feedback component, respectively; the control component includes a control chip and an instruction input module, used to receive calibration instructions and control the operation of each component.

[0014] Optionally, the pressure transmission assembly includes a transmission medium storage cavity and a medium delivery pipeline. One end of the medium delivery pipeline is connected to the transmission medium storage cavity, and the other end extends into the static reference cavity and the dynamic calibration cavity, respectively. The transmission medium storage cavity is filled with a pressure transmission medium adapted to the characteristics of human body fluids.

[0015] Optionally, the device body is provided with a cavity maintenance interface, which is connected to the static reference cavity and the dynamic calibration cavity respectively, and a sealing end cap is provided at the cavity maintenance interface; the bottom of the device body is provided with a support and positioning structure for stable placement of the device body.

[0016] Compared with the prior art, the present invention achieves the following technical effects: This dual-cavity series pressure sensor signal calibration device, by setting up a static reference cavity and a dynamic calibration cavity connected along the pressure transmission direction, together with the pressure transmission component, forms an integrated structure for static and dynamic pressure calibration. It can complete the calibration of static accuracy and dynamic characteristics sequentially without repeatedly disassembling and assembling the implanted pressure sensor being calibrated, effectively improving the efficiency of the calibration operation. The pressure stabilizing component in the static reference cavity can buffer the pressure fluctuations within the cavity, and the pressure disturbance suppression structure on the inner wall of the dynamic calibration cavity can suppress turbulence interference during the pressure transmission process. The combination of the two ensures the stability of the reference pressure and the dynamic simulated pressure, providing structural support for the accuracy of the calibration results.

[0017] The device is equipped with an on / off control component in the connecting channel, which can accurately open and close the pressure path between the static reference chamber and the dynamic calibration chamber. It can flexibly switch the calibration mode according to the calibration requirements and meet the pressure environment requirements of static and dynamic calibration. The sealing component adopts a multi-layer sealing structure or an air-filled sealing structure, which can reliably seal the static reference chamber, the dynamic calibration chamber and the connecting channel, avoid the pressure medium leakage from affecting the calibration effect, and adapt to different cavity processing precision requirements, thus improving the adaptability of the sealing structure.

[0018] The positioning structure at the calibration interface, in conjunction with the flexible sealing gasket, enables precise positioning of the implanted pressure sensor being calibrated, ensuring coaxiality between the sensor pressure inlet and the pressure transmission path within the cavity. It also ensures a sealed connection between the calibration interface and the sensor housing, preventing leakage during pressure transmission. The pressure transmission component is filled with a pressure transmission medium compatible with the characteristics of human body fluids, preventing damage to the biocompatible coating of the implanted pressure sensor during calibration and thus protecting the sensor being calibrated.

[0019] The cavity maintenance interface on the device body facilitates cleaning of the cavity and replenishment of the pressure transmission medium, while the bottom support and positioning structure ensures the overall stability of the device, guaranteeing smooth calibration operations. Overall, the structural design of this device is suitable for the calibration requirements of biomedical implantable pressure sensors, the calibration operation is convenient, the calibration results are accurate and reliable, and it has strong practicality. Attached Figure Description

[0020] Figure 1 This is a side view of the overall structure of a dual-cavity series pressure sensor signal calibration device according to an embodiment of the present invention; Figure 2 This is a top view of the pressure stabilizer in a dual-cavity series pressure sensor signal calibration device according to an embodiment of the present invention; Figure 3 This is a top view of the pressure disturbance suppression structure in a dual-cavity series pressure sensor signal calibration device according to an embodiment of the present invention; Figure 4 This is a side view of the sealing assembly in a dual-chamber series pressure sensor signal calibration device according to an embodiment of the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings, not all of them. Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe operations (or steps) as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but may also have additional steps not included in the drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0022] The technical solutions of the embodiments of the present invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0023] See Figures 1 to 4This invention provides a dual-cavity series pressure sensor signal calibration device, including a device body 1, and a dual-cavity series structure, a pressure transmission component 7, a sealing component 6, and a calibration interface 8 integrated within the device body 1. The dual-cavity series structure includes a static reference cavity 2 and a dynamic calibration cavity 3 connected sequentially along the pressure transmission direction. The static reference cavity 2 and the dynamic calibration cavity 3 are pressure-conducting through a through-connection channel 4. The pressure transmission component 7 is disposed within the dual-cavity series structure and is used to generate a stable reference pressure in the static reference cavity 2 and a dynamic simulated pressure in the dynamic calibration cavity 3, and transmit it to the calibration interface 8. The sealing component 6 is disposed on the inner wall of the static reference cavity 2, the dynamic calibration cavity 3, and the connecting channel 4. The calibration interface 8 is disposed at the end of the device body 1 and is used for detachable docking with an implantable pressure sensor.

[0024] In some embodiments, the connecting channel 4 of the dual-chamber series structure is provided with an on / off control component 5. The on / off control component 5 includes a valve body 51 and a drive component 52. The valve body 51 is used to control the opening and closing of the connecting channel 4. The drive component 52 is connected to the valve body 51 and is used to drive the opening and closing action of the valve body 51.

[0025] In some embodiments, the static reference cavity 2 includes a static cavity body 21, a reference pressure generating component 22, and a pressure stabilizing component 23; the reference pressure generating component 22 is disposed at one end of the static cavity body 21 and is used to input stable pressure into the static reference cavity 2; the pressure stabilizing component 23 is disposed inside the static cavity body 21 and is a flexible diaphragm structure used to buffer pressure fluctuations to maintain stable pressure inside the cavity.

[0026] In some embodiments, the dynamic calibration cavity 3 includes a dynamic cavity body 31 and a dynamic pressure driving component 32; the dynamic pressure driving component 32 is disposed on the outside of the dynamic cavity body 31 and is connected to the cavity wall of the dynamic cavity body 31 for driving the pressure inside the dynamic cavity body 31 to generate periodic or transient changes; the inner wall of the dynamic cavity body 31 is provided with a pressure disturbance suppression structure 33, which is an array of annular bosses.

[0027] In some embodiments, the sealing assembly 6 includes a multi-layer sealing structure, which includes an inner flexible sealing layer and an outer rigid support sealing layer; the flexible sealing layer is tightly fitted to the cavity wall of the dual-cavity series structure, and the rigid support sealing layer is wrapped around the outside of the flexible sealing layer to provide structural support for the flexible sealing layer; the flexible sealing layer is made of medical-grade elastic sealing material.

[0028] In some embodiments, the calibration interface 8 includes an interface base 81, a positioning structure 82, and a flexible sealing gasket 83; the positioning structure 82 is disposed inside the interface base 81 for circumferential positioning of the implantable pressure sensor; the flexible sealing gasket 83 is disposed around the inside of the positioning structure 82, and the inner contour of the flexible sealing gasket 83 is adapted to the outer contour of the housing of the implantable pressure sensor to achieve a sealed connection between the calibration interface 8 and the implantable pressure sensor.

[0029] In some embodiments, a data acquisition and feedback component is also included, which includes a standard pressure sensor and a signal acquisition module. The standard pressure sensor is respectively disposed in the static reference cavity 2 and the dynamic calibration cavity 3 to acquire the actual pressure signal in the cavity. The signal acquisition module is electrically connected to the standard pressure sensor, and the signal acquisition module has a reserved signal interface for connection with the implanted pressure sensor being calibrated.

[0030] In some embodiments, the device body 1 also integrates a control component, which is electrically connected to the pressure transmission component 7, the on / off control component 5, and the data acquisition and feedback component. The control component includes a control chip and an instruction input module, which are used to receive calibration instructions and control the operation of each component.

[0031] In some embodiments, the pressure transmission assembly 7 includes a transmission medium storage cavity 71 and a medium delivery pipeline 72. One end of the medium delivery pipeline 72 is connected to the transmission medium storage cavity 71, and the other end extends into the static reference cavity 2 and the dynamic calibration cavity 3, respectively. The transmission medium storage cavity 71 is filled with a pressure transmission medium adapted to the characteristics of human body fluids.

[0032] In some embodiments, the device body 1 is provided with a cavity maintenance interface 11, which is connected to the static reference cavity 2 and the dynamic calibration cavity 3 respectively, and a sealing end cap 111 is provided at the cavity maintenance interface 11; a support and positioning structure 12 is provided at the bottom of the device body 1 to achieve stable placement of the device body 1.

[0033] Example 1 like Figures 1 to 4 As shown, the dual-chamber series pressure sensor signal calibration device provided in this embodiment is used for signal calibration of biomedical implantable pressure sensors. It includes a device body 1, and a dual-chamber series structure, a pressure transmission component 7, a sealing component 6, and a calibration interface 8 integrated in the device body 1.

[0034] The dual-chamber series structure includes a static reference chamber 2 and a dynamic calibration chamber 3 connected sequentially along the pressure transmission direction. The static reference chamber 2 and the dynamic calibration chamber 3 are connected by a through connecting channel 4 to achieve pressure conduction. An on / off control component 5 is provided in the connecting channel 4. The on / off control component 5 includes a valve body 51 and a drive component 52. The valve body 51 adopts a valve core structure, which is adapted to the inner diameter of the connecting channel 4 and is used to control the opening and closing of the connecting channel 4. The drive component 52 is a micro stepper motor, and its output shaft is connected to the valve body 51 through a coupling to drive the valve body 51 to translate along the axis of the connecting channel 4 to realize the opening and closing of the channel.

[0035] The static reference cavity 2 includes a static cavity body 21, a reference pressure generating component 22, and a pressure stabilizing component 23. The static cavity body 21 is a cylindrical structure with one end closed and the other end connected to the connecting channel 4, and is fixedly connected to the device body 1 by bolts. The reference pressure generating component 22 is located at the closed end of the static cavity body 21 and adopts a miniature precision pressure cylinder to input a stable reference pressure into the static reference cavity 2, providing a pressure source for the static accuracy calibration of the calibrated sensor. The pressure stabilizing component 23 is located inside the static cavity body 21, near the connecting channel 4. The pressure stabilizing component 23 is a flexible diaphragm structure made of medical-grade nitrile rubber, and its edge is sealed to the inner wall of the static cavity body 21. It can buffer the pressure fluctuations in the static reference cavity 2 through its own elastic deformation and maintain the stability of the cavity pressure.

[0036] The dynamic calibration chamber 3 includes a dynamic chamber body 31 and a dynamic pressure driving component 32. The dynamic chamber body 31 has a through-type structure at both ends, with one end connected to the connecting channel 4 and the other end corresponding to the calibration interface 8. It is an integrally formed structure with the device body 1. The dynamic pressure driving component 32 is located on the outside of the dynamic chamber body 31. Specifically, it is a piezoelectric ceramic driving component. Its output end is connected to the cavity wall of the dynamic chamber body 31. The high-frequency expansion and contraction motion of the piezoelectric ceramic drives the pressure inside the dynamic chamber body 31 to generate periodic or transient changes, so as to reproduce the dynamic pressure environment of human physiological processes. The inner wall of the dynamic chamber body 31 is provided with a pressure disturbance suppression structure 33. The pressure disturbance suppression structure 33 is an array of annular bosses. The annular bosses are evenly distributed along the axial direction of the dynamic chamber body 31, which can suppress turbulence interference during pressure transmission and improve the stability of the dynamic pressure signal.

[0037] The sealing assembly 6 is disposed on the inner wall of the static reference cavity 2, the dynamic calibration cavity 3, and the connecting channel 4. It is a multi-layer sealing structure, including an inner flexible sealing layer 61 and an outer rigid support sealing layer 62. The flexible sealing layer 61 is made of medical-grade silicone rubber and fits tightly against the cavity wall of the dual-cavity series structure to achieve basic sealing. The rigid support sealing layer 62 is made of stainless steel and is wrapped around the outside of the flexible sealing layer 61. It is fixed to the cavity wall by bolts and is used to provide structural support for the flexible sealing layer 61 to prevent the flexible sealing layer 61 from undergoing excessive deformation under high pressure, which would lead to sealing failure.

[0038] The pressure transmission assembly 7 includes a transmission medium storage cavity 71 and a medium delivery pipeline 72. One end of the medium delivery pipeline 72 is connected to the transmission medium storage cavity 71, and the other end extends to the static reference cavity 2 and the dynamic calibration cavity 3 through branch pipelines respectively. The transmission medium storage cavity 71 is filled with a pressure transmission medium 73 that is compatible with the characteristics of human body fluids, specifically medical-grade silicone oil, which can avoid damage to the biocompatible coating of the implanted pressure sensor being calibrated during the calibration process.

[0039] The calibration interface 8 is located at the end of the device body 1 and includes an interface base 81, a positioning structure 82, and a flexible sealing gasket 83. The positioning structure 82 is an annular groove located inside the interface base 81, used to circumferentially position the implantable pressure sensor and ensure that the pressure inlet of the sensor is coaxial with the pressure transmission path of the dynamic calibration chamber 3. The flexible sealing gasket 83 is surrounded on the inner side of the positioning structure 82. It is made of medical-grade fluororubber, and its inner ring contour is adapted to the outer circumferential contour of the implantable pressure sensor housing. When the sensor is embedded in the positioning structure 82, the flexible sealing gasket 83 fits tightly with the sensor housing, realizing the sealed connection between the calibration interface 8 and the implantable pressure sensor.

[0040] The device also includes a data acquisition and feedback component (not shown), which includes a standard pressure sensor and a signal acquisition module. The standard pressure sensor is fixed in the static reference cavity 2 and the dynamic calibration cavity 3 respectively by a mounting base, and is used to acquire the actual pressure signal in the cavity in real time. The signal acquisition module is integrated inside the device body 1 and is electrically connected to the standard pressure sensor by a wire. The signal acquisition module also has a reserved signal interface for connection with the implanted pressure sensor being calibrated, which can simultaneously acquire the standard pressure signal and the output signal of the sensor being calibrated.

[0041] The device body 1 also integrates a control component, which is electrically connected to the pressure transmission component 7, the on / off control component 5, and the data acquisition and feedback component. The control component includes a control chip and an instruction input module. The control chip is a microcontroller, and the instruction input module is a touch panel located on the surface of the device body 1. Users can input calibration parameter instructions through the instruction input module. After receiving the instructions, the control chip controls the components to work together to complete the calibration process.

[0042] The device body 1 is also provided with a cavity maintenance interface 11, which is connected to the static reference cavity 2 and the dynamic calibration cavity 3 through branch pipelines. A sealing end cap 111 is threadedly connected to the cavity maintenance interface 11. The cavity can be cleaned or replenished by opening the sealing end cap 111. A support and positioning structure 12 is provided at the bottom of the device body 1. The support and positioning structure 12 is a support foot with anti-slip pads to achieve stable placement of the device body 1.

[0043] The calibration process in this embodiment is as follows: The implantable pressure sensor to be calibrated is positioned and sealed by the positioning structure 82 of the calibration interface 8, and a calibration command is input through the command input module; the control component controls the on / off control component 5 to close the connection channel 4, controls the pressure transmission component 7 to deliver the pressure transmission medium 73 into the static reference cavity 2, and simultaneously controls the reference pressure generating component 22 to generate a stable reference pressure. The standard pressure sensor collects the static reference pressure signal, and the signal acquisition module synchronously collects the output signal of the sensor to be calibrated, completing the static accuracy calibration; after the static calibration is completed, the control component controls the on / off control component 5 to open the connection channel 4, controls the pressure transmission component 7 to replenish the pressure transmission medium 73 into the dynamic calibration cavity 3, and simultaneously controls the dynamic pressure driving component 32 to generate a dynamic simulated pressure. The standard pressure sensor collects the dynamic pressure signal, and the signal acquisition module synchronously collects the dynamic output signal of the sensor to be calibrated, completing the dynamic characteristic calibration.

[0044] Example 2 The difference between this embodiment and Embodiment 1 is that the structure of the dynamic pressure drive component 32 is different, and the specific form of the pressure disturbance suppression structure 33 is different. The rest of the structure and connection relationship are the same as in Embodiment 1.

[0045] In this embodiment, the dynamic pressure drive component 32 adopts a micro pump control system, including a micro peristaltic pump (not shown) and a flow regulating valve (not shown). The micro peristaltic pump is connected to the dynamic calibration chamber 3 through a medium delivery branch, and the flow regulating valve is set on the medium delivery branch and electrically connected to the control component. The control component adjusts the rotation speed of the micro peristaltic pump and the opening of the flow regulating valve to achieve precise control of the periodic or transient changes in pressure in the dynamic calibration chamber 3, adapting to the physiological pressure simulation requirements of different frequencies and different transient rates.

[0046] Meanwhile, the pressure disturbance suppression structure 33 on the inner wall of the dynamic cavity body 31 is a spiral guide groove. The spiral guide groove extends spirally along the axial direction of the dynamic cavity body 31, which can guide the pressure transmission medium 73 to flow along the spiral trajectory, further weakening turbulence disturbance and improving the transmission stability of dynamic pressure signal, especially suitable for high-frequency dynamic pressure calibration scenarios.

[0047] Example 3 The difference between this embodiment and Embodiment 1 is that the structural form of the sealing component 6 and the type of the pressure transmission medium 73 are different, while the rest of the structure and connection relationship are the same as in Embodiment 1.

[0048] In this embodiment, the sealing component 6 adopts an inflatable sealing structure, including a sealing ring (not shown) and a micro air pump (not shown). The sealing ring is a hollow annular structure, which is embedded in the sealing groove of the inner wall of the static reference cavity 2, the dynamic calibration cavity 3 and the connecting channel 4. The micro air pump is integrated into the device body 1 and is connected to the sealing ring through an air inflation pipeline, and a pressure sensor is installed on the air inflation pipeline. Before calibration, the control component controls the micro air pump to inflate the sealing ring until the sealing ring expands and fits tightly against the cavity wall to achieve a seal. This structure can adapt to the processing requirements of different cavity wall precision and improve the sealing reliability.

[0049] In addition, the pressure transmission medium 73 uses medical-grade fluorinated oil, which has better chemical stability and temperature resistance. It can be adapted to the calibration scenario of implantable pressure sensors after high-temperature sterilization, avoiding the deterioration of traditional silicone oil in high-temperature environments and ensuring the safety and stability of the calibration process.

[0050] The above description is merely a preferred embodiment of the present invention and the technical principles employed. The present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions that can be made by those skilled in the art will not depart from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention.

Claims

1. A dual-chamber series pressure sensor signal calibration device, characterized in that, The device includes a main body, and a dual-cavity series structure, a pressure transmission component, a sealing component, and a calibration interface integrated within the main body. The dual-cavity series structure includes a static reference cavity and a dynamic calibration cavity connected sequentially along the pressure transmission direction. The static reference cavity and the dynamic calibration cavity are pressure-conducting through a through-connection channel. The pressure transmission component is disposed within the dual-cavity series structure and is used to generate a stable reference pressure in the static reference cavity, generate a dynamic simulated pressure in the dynamic calibration cavity, and transmit it to the calibration interface. The sealing component is disposed on the inner wall of the static reference cavity, the dynamic calibration cavity, and the connecting channel. The calibration interface is disposed at the end of the main body and is used for detachable docking with an implantable pressure sensor.

2. The dual-chamber series pressure sensor signal calibration device according to claim 1, characterized in that, The connecting channel of the dual-cavity series structure is provided with an on / off control component. The on / off control component includes a valve body and a drive component. The valve body is used to control the opening and closing of the connecting channel. The drive component is driven to the valve body and is used to drive the opening and closing action of the valve body.

3. The dual-chamber series pressure sensor signal calibration device according to claim 1, characterized in that, The static reference cavity includes a static cavity body, a reference pressure generating component, and a pressure stabilizing component; the reference pressure generating component is disposed at one end of the static cavity body and is used to input a stable pressure into the static reference cavity; the pressure stabilizing component is disposed inside the static cavity body and is a flexible diaphragm structure used to buffer pressure fluctuations to maintain pressure stability within the cavity.

4. The dual-chamber series pressure sensor signal calibration device according to claim 1, characterized in that, The dynamic calibration chamber includes a dynamic chamber body and a dynamic pressure driving component; the dynamic pressure driving component is disposed on the outside of the dynamic chamber body and is connected to the cavity wall of the dynamic chamber body for driving the pressure inside the dynamic chamber body to produce periodic or transient changes; the inner wall of the dynamic chamber body is provided with a pressure disturbance suppression structure, which is an array of annular bosses.

5. The dual-chamber series pressure sensor signal calibration device according to claim 1, characterized in that, The sealing assembly includes a multi-layer sealing structure, which includes an inner flexible sealing layer and an outer rigid support sealing layer. The flexible sealing layer is tightly fitted to the cavity wall of the dual-cavity series structure, and the rigid support sealing layer is wrapped around the outside of the flexible sealing layer to provide structural support for the flexible sealing layer. The flexible sealing layer is made of medical-grade elastic sealing material.

6. The dual-chamber series pressure sensor signal calibration device according to claim 1, characterized in that, The calibration interface includes an interface base, a positioning structure, and a flexible sealing gasket. The positioning structure is disposed inside the interface base and is used for circumferential positioning of the implantable pressure sensor. The flexible sealing gasket is disposed around the inside of the positioning structure, and the inner contour of the flexible sealing gasket is adapted to the outer contour of the housing of the implantable pressure sensor to achieve a sealed connection between the calibration interface and the implantable pressure sensor.

7. The dual-chamber series pressure sensor signal calibration device according to claim 2, characterized in that, It also includes a data acquisition and feedback component, which includes a standard pressure sensor and a signal acquisition module. The standard pressure sensor is respectively disposed in the static reference cavity and the dynamic calibration cavity to acquire the actual pressure signal in the cavity. The signal acquisition module is electrically connected to the standard pressure sensor, and the signal acquisition module has a reserved signal interface for connection with the implanted pressure sensor being calibrated.

8. The dual-chamber series pressure sensor signal calibration device according to claim 7, characterized in that, The device body also integrates a control component, which is electrically connected to the pressure transmission component, the on / off control component, and the data acquisition and feedback component. The control component includes a control chip and an instruction input module, which are used to receive calibration instructions and control the operation of each component.

9. The dual-chamber series pressure sensor signal calibration device according to claim 1, characterized in that, The pressure transmission component includes a transmission medium storage cavity and a medium delivery pipeline. One end of the medium delivery pipeline is connected to the transmission medium storage cavity, and the other end extends into the static reference cavity and the dynamic calibration cavity, respectively. The transmission medium storage cavity is filled with a pressure transmission medium adapted to the characteristics of human body fluids.

10. The dual-chamber series pressure sensor signal calibration device according to claim 1, characterized in that, The device body is provided with a cavity maintenance interface, which is connected to the static reference cavity and the dynamic calibration cavity respectively, and a sealing end cap is provided at the cavity maintenance interface; the bottom of the device body is provided with a support and positioning structure for stable placement of the device body.

Images