CN115615582A - Pressure detection device, system and implantable medical device - Google Patents
Pressure detection device, system and implantable medical device Download PDFInfo
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- CN115615582A CN115615582A CN202211262048.0A CN202211262048A CN115615582A CN 115615582 A CN115615582 A CN 115615582A CN 202211262048 A CN202211262048 A CN 202211262048A CN 115615582 A CN115615582 A CN 115615582A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/03—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs
- A61B5/036—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs by means introduced into body tracts
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6862—Stents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6867—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive specially adapted to be attached or implanted in a specific body part
- A61B5/6869—Heart
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0247—Pressure sensors
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Abstract
The application relates to a pressure detection device, a system and an implantable medical device, wherein in the pressure detection device, a folded flexible circuit board comprises a first part and a second part which are alternately arranged, the first part is stacked along the height direction of the pressure detection device, and the second part is connected with the adjacent first part; the electric energy receiving circuit is respectively connected with the signal transmitting circuit and the pressure sensor, the pressure sensor is connected with the signal transmitting circuit, components in the electric energy receiving circuit and the signal transmitting circuit are arranged on the first portion of the flexible circuit board, and the pressure sensor is arranged on the outer side of the flexible circuit board. An implantable medical device comprises the pressure detection apparatus. The pressure monitoring system comprises a transceiver and the pressure detection device. The circuit layout in the miniature space is realized by adopting the folding flexible circuit board, the passive wireless working mode is realized by arranging the electric energy receiving circuit and the signal sending circuit, and the requirements of miniaturization and long-term operation of an implanted device can be met.
Description
Technical Field
The present application relates to the field of medical device technology, and in particular, to a pressure detection apparatus, system and implantable medical device.
Background
Left Atrial Pressure (LAP) is an important index for evaluating cardiac function, and in the related art, average Left Atrial Pressure is measured by inserting a catheter with a balloon attached to the tip thereof into the esophagus and inflating the catheter at a position adjacent to the Left atrium, and in addition to this, there are methods such as pulmonary artery catheterization, ultrasonic doppler echocardiography, and the like.
In the above methods, the balloon needs to be placed in the esophagus, and the methods are invasive or dependent on the operation of the operator, and thus have problems of poor portability and low comfort. Therefore, the implantable device can better meet the requirements of portability and comfort, but the size and the service life of the device are higher in consideration of the limitation of the application environment space and the minimally invasive injury to a patient in the implantation process, so that a scheme suitable for left atrial pressure monitoring needs to be provided to meet the requirements of miniaturization and long-term operation of the implantable device.
Disclosure of Invention
In view of the above technical problems, the present application provides a pressure detection apparatus, a system and an implantable medical device, which can meet the requirements of miniaturization and long-term operation of the implantable device.
In order to solve the technical problem, the application provides a pressure detection device, which comprises a flexible circuit board, an electric energy receiving circuit, a signal sending circuit and a pressure sensor; the flexible circuit board comprises first parts and second parts which are alternately arranged, the first parts are arranged in a stacked mode in the height direction of the pressure detection device, and the second parts are connected with the adjacent first parts to enable the flexible circuit board to form a folding structure; the electric energy receiving circuit is respectively connected with the signal transmitting circuit and the pressure sensor, the pressure sensor is connected with the signal transmitting circuit, components in the electric energy receiving circuit and the signal transmitting circuit are arranged on the first part of the flexible circuit board, and the pressure sensor is arranged on the outer side of the flexible circuit board.
Optionally, the flexible printed circuit board is contained in the shell, a cavity is arranged on one side of the shell corresponding to the pressure sensor, and the cavity is communicated with the pressure sensor and an external space.
Optionally, a reinforcing patch is disposed on a side of the first portion of the flexible circuit board facing away from the component, and the number of circuit layers of the first portion of the flexible circuit board is greater than or equal to that of the second portion.
Optionally, an adhesive is filled between adjacent first portions of the flexible circuit board for shaping.
Optionally, the electric energy receiving circuit comprises a coupling coil and a power supply circuit, the signal transmitting circuit comprises a microcontroller, a load modulation circuit and the coupling coil, the coupling coil is used for receiving external electric energy and transmitting a detection signal of the pressure sensor, an input end of the power supply circuit is connected with the coupling coil, an output end of the power supply circuit is respectively connected with the microcontroller and the pressure sensor, the microcontroller is respectively connected with the load modulation circuit and the pressure sensor, an input end of the load modulation circuit is connected with the microcontroller, and an output end of the load modulation circuit is connected with the coupling coil.
Optionally, the electric energy receiving circuit includes a coupling coil and a power circuit, the signal transmitting circuit includes a wireless communication chip and an antenna, the coupling coil is configured to receive external electric energy, an input end of the power circuit is connected to the coupling coil, an output end of the power circuit is connected to the wireless communication chip and the pressure sensor, respectively, an input end of the wireless communication chip is connected to the pressure sensor, and an output end of the wireless communication chip is connected to the antenna.
Optionally, the coupling coil includes the bar magnet and establishes around the coil of bar magnet periphery, the bar magnet is followed pressure measurement sets up, pressure sensor sets up the most lateral side of flexible circuit board the outside of first portion, the bar magnet is located another most lateral side of flexible circuit board the outside of first portion, the both ends of coil with pin on the flexible circuit board is connected.
Optionally, the pressure sensor includes a bare chip and a flexible package layer, the bare chip is fixed on the flexible circuit board and electrically connected to the pins on the flexible circuit board, and the flexible package layer covers the bare chip.
The present application also provides an implantable medical device comprising a pressure detection apparatus as described in any of the above.
The application also provides a pressure monitoring system, which comprises a transceiver and the pressure detection device as described in any one of the above, wherein the transceiver is wirelessly connected with the pressure detection device, and the transceiver is used for providing electric energy to an electric energy receiving circuit of the pressure detection device and receiving a pressure detection signal sent by a signal sending circuit of the pressure detection device.
In the pressure detection device, the folded flexible circuit board comprises a first part and a second part which are alternately arranged, the first part is stacked along the height direction of the pressure detection device, and the second part is connected with the adjacent first part; the electric energy receiving circuit is respectively connected with the signal transmitting circuit and the pressure sensor, the pressure sensor is connected with the signal transmitting circuit, components in the electric energy receiving circuit and the signal transmitting circuit are arranged on the first portion of the flexible circuit board, and the pressure sensor is arranged on the outer side of the flexible circuit board. An implantable medical device comprises the pressure detection apparatus. The pressure monitoring system comprises a transceiver and the pressure detection device. The circuit layout in the miniature space is realized by adopting the folding flexible circuit board, the passive wireless working mode is realized by arranging the electric energy receiving circuit and the signal sending circuit, and the requirements of miniaturization and long-term operation of an implanted device can be met.
Drawings
Fig. 1 is a schematic configuration diagram showing a pressure detection apparatus according to a first embodiment;
fig. 2 is a schematic view of the flexible circuit board shown in an unfolded state according to the first embodiment;
FIG. 3 is a schematic view showing the structure and installation of a pressure sensor according to a first embodiment;
FIG. 4 is a schematic diagram of the circuit connections shown according to the first embodiment;
fig. 5 is a schematic diagram showing the operating principle of the circuit according to the first embodiment;
fig. 6 is a schematic circuit connection diagram showing a pressure detection device according to a second embodiment;
fig. 7 is a schematic configuration diagram showing a pressure detection system according to a third embodiment;
fig. 8 is a schematic structural view of a pressure detection system according to a fourth embodiment.
Detailed Description
The following description of the embodiments of the present application is provided for illustrative purposes, and other advantages and capabilities of the present application will become apparent to those skilled in the art from the present disclosure.
In the following description, reference is made to the accompanying drawings that describe several embodiments of the application. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present application. The following detailed description is not to be taken in a limiting sense, and the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Although the terms first, second, etc. may be used herein to describe various elements in some instances, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.
Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.
First embodiment
Fig. 1 is a schematic structural view of a pressure detection device shown according to a first embodiment. As shown in fig. 1, a pressure detecting apparatus of the present application includes a flexible circuit board 11, an electric energy receiving circuit, a signal transmitting circuit, and a pressure sensor 14. The flexible circuit board 11 includes first portions 111 and second portions 112 alternately arranged, the first portions 111 are arranged in a stacked manner in a height direction of the pressure detection device, and the second portions 112 connect the adjacent first portions 111, so that the flexible circuit board 11 forms a folded structure. The electric energy receiving circuit is respectively connected with the signal transmitting circuit and the pressure sensor 14, the pressure sensor 14 is connected with the signal transmitting circuit, components 123 in the electric energy receiving circuit and the signal transmitting circuit are arranged on the first portion 111 of the flexible circuit board 11, and the pressure sensor 14 is arranged on the outer side of the flexible circuit board 11.
In the structure, the flexible circuit board 11 is folded into a three-dimensional structure to realize the layout of circuit components in a micro space, so that the requirement of miniaturization of an implanted device can be met. The passive and wireless working mode is realized by arranging the electric energy receiving circuit and the signal sending circuit, the requirement of long-term operation can be met, and when the passive and wireless working mode is applied to monitoring the left atrial pressure, the wound and the cost caused by device replacement can be reduced.
The flexible printed circuit board 11 can use a PI (polyimide) material as a base material, and has the characteristics of high wiring density, light weight, thin thickness, and good bending property. Fig. 2 is a schematic view of the flexible circuit board 11 in an unfolded state. The flexible circuit board 11 comprises first portions 111 and second portions 112 arranged alternately, the first portions 111 being used for arranging the pressure sensors 14 and components 123, including the microcontroller 132 and other components in the circuit, in the electric energy receiving circuit and the signal transmitting circuit, and the second portions 112 being used for connecting the electric lines between adjacent first portions 111, preferably without components. Alternatively, the first portion 111 is in the shape of a circular disc, the second portion 112 is in the shape of a rectangular disc, and two opposite sides of the second portion 112 are a chord corresponding to the first portion 111, and the chord is where the folding is performed. The lengths of the different second portions 112 may be the same or different, and are determined mainly by the height of the components 123 on the folded first portion 111, and preferably not less than the sum of the height of the components 123 on the two sides of the first portion 111 and the thickness of the flexible circuit board 11 itself. So, make a round trip to fold flexible circuit board 11, the whole three-dimensional columnar structure that forms, the diameter can be less than 4mm, and pressure measurement device's whole length can be less than 15mm, satisfies the miniaturized demand of implantation device.
The number of circuit layers of the flexible circuit board 11 is selected according to the complexity of the circuit signal lines, and it is preferable that the number of circuit layers of the first portion 111 of the flexible circuit board 11 is greater than or equal to the number of circuit layers of the second portion 112 in view of the flexibility at the fold. For example, when two layers of wires cannot meet the wiring requirement, a 4-layer wire may be used in the first portion 111 and a 2-layer wire may be used in the second portion 112. It should be understood that the circuit layer in the first portion 111 connected to the second portion 112 may be selected as needed, for example, when the first portion 111 uses 4-layer lines and the second portion 112 uses 2-layer lines, any two layers of the first portion 111 may be selected to be electrically connected to the second portion 112, for example, the first layer and the second layer in the first portion 111 are connected to the second portion 112, and the third layer and the fourth layer may be selected to be connected to the second portion 112.
With reference to fig. 1, alternatively, in order to improve the soldering reliability of the component 123 on the first portion 111, the reinforcing plate 113 may be disposed on a side of the first portion 111 opposite to the component 123, the material of the reinforcing plate 113 may be PI, stainless steel sheet, or FR4 material, the thickness of the reinforcing plate 113 is generally about 0.1mm, the size of the reinforcing plate 113 is consistent with the shape of the first portion 111, or may be smaller than the size of the first portion 111, but the reinforcing plate 113 is ensured to cover the disposition area of the component 123.
The adhesive 114 is filled between the adjacent first portions 111 of the folded flexible circuit board 11 for shaping, and the adhesive 114 may be an epoxy resin adhesive, a silicone rubber material, or a polyurethane material. Specifically, the folded flexible circuit board 11 may be placed in a suitable shape mold, and the adhesive 114 is filled for structural fixation, so as to ensure that the three-dimensional circuit formed by folding is stable and does not scatter, and after the adhesive 114 is cured, the flexible circuit board 11 is taken out from the shape mold, and the corresponding surface is polished smooth.
Referring to fig. 1 and fig. 3 together, the pressure sensor 14 includes a bare chip 141 and a flexible package layer 142, the bare chip 141 is fixed on the flexible circuit board 11 and electrically connected to the leads on the flexible circuit board 11 through leads 143, and the flexible package layer 142 covers the bare chip 141. The bare chip 141 is a bridge type pressure sensor MEMS bare chip, and is wire bonded to the flexible circuit board 11. Specifically, the bare chip 141 is bonded and fixed to the flexible printed circuit board 11 by a structural adhesive (such as Wacker988 black adhesive); after the structural adhesive is cured, a gold wire of 18 μm is used as a lead 143 to electrically connect the bare chip 141 and the corresponding pad on the flexible circuit board 11; subsequently, the adhesive dispensing treatment is performed by using the biocompatible silicone, so that the whole bare chip 141 and the surrounding leads 143 are covered and protected, and the waterproof requirement is met.
Optionally, the pressure detecting device includes a housing, the flexible circuit board 11 is accommodated in the housing, a cavity 18 is disposed on a side of the housing corresponding to the pressure sensor 14, and the cavity 18 communicates the pressure sensor 14 with an external space through a through hole 19. In this way, since the cavity 18 communicates the external space with the pressure sensor 14, external fluid can flow into the cavity 18, the flow rate of the fluid around the pressure sensor 14 is reduced, and the accuracy of the detection result of the pressure sensor 14 is improved. Specifically, the housing includes a first housing 171, a second housing 172 and a third housing 173 that are connected to each other in sequence, the joint of the second housing 172 with the first housing 171 and the third housing 173 is sealed, the joint of the first housing 171 with the flexible circuit board 11 is sealed, and the cavity 18 is formed between the first housing 171 and the outermost side of the flexible circuit board 11. In practical implementation, the second casing 172 and the third casing 173 may be a unitary structure, and the cavity 18 may be filled with the material of the flexible encapsulating layer 142 to be a part of the flexible encapsulating layer 142.
Fig. 4 is a schematic circuit diagram of the present embodiment. The electric energy receiving circuit comprises a coupling coil 12 and a power circuit 124, the signal transmitting circuit comprises a microcontroller 132, a load modulation circuit 131 and the coupling coil 12, the coupling coil 12 is used for receiving external electric energy and transmitting a detection signal of a pressure sensor 14, the input end of the power circuit 124 is connected with the coupling coil 12, the output end of the power circuit 124 is respectively connected with the microcontroller 132 and the pressure sensor 14, the microcontroller 132 is respectively connected with the load modulation circuit 131 and the pressure sensor 14, the input end of the load modulation circuit 131 is connected with the microcontroller 132, and the output end of the load modulation circuit 131 is connected with the coupling coil 12.
Specifically, the external electric energy may be coupled to the coupling coil 12 in the pressure detecting device in the form of high-frequency electromagnetic energy, and the power circuit 124 is used for rectifying and stabilizing the received high-frequency electric energy and converting the rectified and stabilized electric energy into an operating voltage adapted to the microcontroller 132 and the pressure sensor 14. The Microcontroller 132 may be a Micro Controller Unit (MCU) with low power consumption, so as to reduce the power consumption of the circuit of the pressure detection device, thereby obtaining a longer electric energy and data transmission distance.
The detection signal of the pressure detection device is transmitted to an external device through the coupling coil 12 in a load impedance modulation mode. Referring to fig. 5, the working principle of load impedance modulation is that a coil L1 (external coil) and a capacitor C connected in parallel form a parallel resonant circuit, a load modulation circuit 131 is provided with a switch S, the on-off of the switch S is controlled according to the high and low levels of an effective data stream, the effective data stream is generated according to the detection data of a pressure sensor 14, during the on-off alternating process of the switch S, an additional impedance R is alternately switched on and off, which causes the voltage change at two ends of the coil L2 (equivalent to the coupling coil 12), and due to the inductive coupling effect of the coil L2 and the coil L1 (external coil), the voltage change at two ends of the coil L2 causes the amplitude change of the voltage at two ends of the coil L1. In this way, the microcontroller 132 controls the switch S to be turned on or off according to the detection data of the pressure sensor 14, i.e. the corresponding signal of the detection data can be transmitted to the external device through the coupling coil 12, and the change of the voltage amplitude of the coil L2 can use the principle of envelope detection to demodulate the low-frequency signal, and further data shaping to read the detection data, thereby realizing the transmission of the detection signal.
In this way, based on coupling coil 12 provides pressure measurement device's working power supply to synchronous with pressure measurement data transmission to external device, simple structure need not to set up power module and signal transmission line, can satisfy the demand of long-term operation, when being applied to monitoring left atrium pressure, can reduce wound and the cost that the replacement device brought.
With reference to fig. 1, optionally, the coupling coil 12 includes a magnetic bar 121 and a coil 122 wound around the magnetic bar 121, the magnetic bar 121 is disposed along a height direction of the pressure detection device, the pressure sensor 14 is disposed outside the first portion 111 at the most lateral side of the flexible circuit board 11, the magnetic bar 121 is disposed outside the first portion 111 at the other most lateral side of the flexible circuit board 11, and two ends of the coil 122 are connected to the pins on the flexible circuit board 11. Preferably, the magnetic rod 121 is a ferrite magnetic rod, which has the advantages of high magnetic permeability and strong signal gathering capability, and is helpful for receiving more electromagnetic energy. According to the volume requirement, the magnetic rod 121 is formed by firing a nickel-zinc material with high magnetic permeability, the magnetic rod 121 is cylindrical, the diameter is 3mm for example, and the length is 6mm for example, 0.2mm wire diameter enameled copper wire is wound on the magnetic rod 121 to be used as the coil 122, and a lead is led out from a single end and is welded to a pin on the flexible circuit board 11.
In the pressure detection device, the folded flexible circuit board comprises a first part and a second part which are alternately arranged, the first part is stacked along the height direction of the pressure detection device, and the second part is connected with the adjacent first part; the electric energy receiving circuit is respectively connected with the signal transmitting circuit and the pressure sensor, the pressure sensor is connected with the signal transmitting circuit, components in the electric energy receiving circuit and the signal transmitting circuit are arranged on the first portion of the flexible circuit board, and the pressure sensor is arranged on the outer side of the flexible circuit board. The circuit layout in the micro space is realized by adopting the folded flexible circuit board, so that the volume of the circuit can be greatly reduced, and the miniaturization application of a device is promoted; the passive and wireless working mode is realized by arranging the electric energy receiving circuit and the signal transmitting circuit, and the requirement of long-term operation is met.
Second embodiment
Fig. 6 is a schematic circuit connection diagram of the pressure detection device shown in accordance with the second embodiment. As shown in fig. 6, the main difference of the pressure detection apparatus of the present embodiment from the first embodiment lies in the transmission manner of signals, wherein the electric energy receiving circuit includes a coupling coil 22 and a power circuit 224, the signal transmitting circuit includes a wireless communication chip 232 and an antenna 231, the coupling coil 22 is used for receiving external electric energy, the input end of the power circuit 224 is connected with the coupling coil 22, the output end of the power circuit 224 is respectively connected with the wireless communication chip 232 and the pressure sensor 24, the input end of the wireless communication chip 232 is connected with the pressure sensor 24, and the output end of the wireless communication chip 232 is connected with the antenna 231.
The present embodiment separates the wireless power supply and the wireless data transmission. The wireless power supply portion is the same as the first embodiment, and is not described again. The wireless data transmission can be realized by using a bluetooth low energy communication technology, wherein the wireless communication chip 232 can be a bluetooth SOC chip which comprises a basic MCU and a 2.4G transceiver circuit and a bluetooth low energy protocol stack, and the antenna 231 can be a ceramic antenna which is arranged on the first part of the flexible circuit board at the extreme side or an on-board antenna which is directly manufactured on the first part of the flexible circuit board at the extreme side by an etching method.
The wireless communication chip 232 may establish a communication protocol with an external wireless communication chip, so that the amount of the electric energy received by the coupling coil 22 may be fed back to an external circuit, a feedback mechanism for electric energy transmission is established, which is beneficial to adjusting transmission distance and optimizing efficiency, and a transmission mechanism for the detection data of the pressure sensor 24 may be established, and according to the application needs, several different sensor data uploading time intervals may be set, for example, 1 second, 1 minute or 5 minutes, etc., to reduce the data processing amount of the external circuit. In practical applications, the wireless data may also be other technologies of near field wireless communication, for example, zigbee, sub-G and other low power consumption communication technologies.
Other structures of the pressure detecting device of this embodiment are the same as those of the first embodiment, and are not described herein again.
In the pressure detection device, the wireless communication chip and the antenna are adopted to transmit signals, a feedback mechanism of electric energy transmission can be established, transmission setting of detection data is supported, and the requirements of more application scenes are met.
The present application also provides an implantable medical device comprising a pressure detection apparatus as described in the various embodiments above. Optionally, the implantable medical device is a heart stent.
Third embodiment
The pressure monitoring system of this embodiment includes a transceiver and the pressure detecting device as described in the first embodiment, the transceiver is wirelessly connected to the pressure detecting device, and the transceiver is used for providing electric energy to an electric energy receiving circuit of the pressure detecting device and receiving a pressure detecting signal sent by a signal sending circuit of the pressure detecting device.
As shown in fig. 7, the connection of the circuit portions is mainly illustrated. The electric energy receiving circuit of the pressure detection device comprises a coupling coil 12 and a power circuit 124, the signal transmitting circuit comprises a microcontroller 132, a load modulation circuit 131 and the coupling coil 12, the coupling coil 12 is used for receiving external electric energy and transmitting a detection signal of a pressure sensor 14, the input end of the power circuit 124 is connected with the coupling coil 12, the output end of the power circuit 124 is respectively connected with the microcontroller 132 and the pressure sensor 14, the microcontroller 132 is respectively connected with the load modulation circuit 131 and the pressure sensor 14, the input end of the load modulation circuit 131 is connected with the microcontroller 132, and the output end of the load modulation circuit 131 is connected with the coupling coil 12. The operation and structure of the pressure detecting device are the same as those of the first embodiment, and are not described again.
The transceiver comprises a high-frequency oscillator 31, a high-frequency amplifier 32, a parallel resonant coil 33, an amplifying and detecting circuit 34, a shaping circuit 35, an external microcontroller 36 and a transmission circuit 37 which are connected in sequence, wherein a frequency source of the high-frequency oscillator 31 is processed by the high-frequency amplifier 32 and then is coupled to the coupling coil 12 of the pressure detection device through the parallel resonant coil 33, so that the electric energy is transmitted.
The detection signal of the pressure detection device is transmitted to the parallel resonance coil 33 through the inductive coupling effect of the coupling coil 12 and the parallel resonance coil 33, the demodulation of the low-frequency signal is realized through the amplifying and detecting circuit 34, the detection data is further read through the Schmitt shaping by the shaping circuit 35, and then the detection data is transmitted to the transmission circuit 37 through the external microcontroller 36, and is transmitted to the corresponding component through the transmission circuit 37, for example, the detection data is transmitted to a display for display. The external Microcontroller 36 may be a Micro Controller Unit (MCU), which has low power consumption and can obtain a long transmission distance of electric energy and data. The transceiver may be provided on a shoulder strap or a chest strap for portability.
Fourth embodiment
The pressure monitoring system of this embodiment comprises a transceiver and the pressure detecting device as described in the second embodiment, the transceiver is wirelessly connected to the pressure detecting device, and the transceiver is used for providing electric energy to an electric energy receiving circuit of the pressure detecting device and receiving a pressure detecting signal sent by a signal sending circuit of the pressure detecting device. Different from the third embodiment, the transceiver and the pressure detection device of the present embodiment implement signal transmission by using the near field wireless communication technology.
As shown in fig. 8, the connection of the circuit portions is mainly illustrated. The electric energy receiving circuit of the pressure detection device comprises a coupling coil 22 and a power circuit 224, the signal transmitting circuit comprises a wireless communication chip 232 and an antenna 231, the coupling coil 22 is used for receiving external electric energy, the input end of the power circuit 224 is connected with the coupling coil 22, the output end of the power circuit 224 is respectively connected with the wireless communication chip 232 and the pressure sensor 24, the input end of the wireless communication chip 232 is connected with the pressure sensor 24, and the output end of the wireless communication chip 232 is connected with the antenna 231. The operation and structure of the pressure detecting device are the same as those of the second embodiment, and are not described again.
The transceiver device includes a high-frequency oscillator 41, a high-frequency amplifier 42, a parallel resonant coil 43, an external antenna 44, an external wireless communication chip 45, and a transmission circuit 46, wherein the high-frequency oscillator 41, the high-frequency amplifier 42, and the parallel resonant coil 43 are connected in sequence, and the external wireless communication chip 45 is connected to the high-frequency amplifier 42, the external antenna 44, and the transmission circuit 46, respectively. The frequency source of the high-frequency oscillator 41 is processed by the high-frequency amplifier 42 and then coupled to the coupling coil 22 of the pressure detection device through the parallel resonance coil 43, so that the electric energy is transferred.
The detection signal of the pressure detection device is transmitted to the external antenna 44 through the antenna 231, and then is transmitted to the transmission circuit 46 through the external wireless communication chip 45, and is transmitted to the corresponding component through the transmission circuit 46, for example, to a display for displaying. The wireless communication chip 232 may be a bluetooth SOC chip that includes the basic MCU and 2.4G transceiver circuitry and a bluetooth low energy protocol stack.
The external wireless communication chip 45 can also control the high-frequency amplifier 42 to adjust the power transmitted by the parallel resonant coil 43 to the outside, and in addition, the external wireless communication chip 45 can establish a communication protocol with the wireless communication chip 232 of the pressure detection device, so that the wireless communication chip 232 of the pressure detection device can feed back the electric energy received by the coupling coil 22 to the external wireless communication chip 45, and a feedback mechanism of the electric energy transmission is established, which is beneficial to adjusting the transmission distance and optimizing the efficiency. In addition, a transmission mechanism of the detection data of the pressure sensor 24 can be established, and several different sensor data uploading time intervals can be set according to application needs, for example, 1 second, 1 minute or 5 minutes, and the data processing amount of an external circuit is reduced. In practical applications, the wireless data may also be other technologies of near field wireless communication, for example, zigbee, sub-G and other low power consumption communication technologies. In comparison with the third embodiment, the present embodiment omits a load impedance modulation circuit, an amplification detection circuit, and a shaping circuit. The transceiver may be provided on a shoulder strap or a chest strap for portability.
The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the present application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.
Claims (10)
1. A pressure detection device is characterized by comprising a flexible circuit board, an electric energy receiving circuit, a signal sending circuit and a pressure sensor; the flexible circuit board comprises a first part and a second part which are alternately arranged, the first part is stacked along the height direction of the pressure detection device, and the second part is connected with the adjacent first part to enable the flexible circuit board to form a folding structure; the electric energy receiving circuit is respectively connected with the signal transmitting circuit and the pressure sensor, the pressure sensor is connected with the signal transmitting circuit, components in the electric energy receiving circuit and the signal transmitting circuit are arranged on the first portion of the flexible circuit board, and the pressure sensor is arranged on the outer side of the flexible circuit board.
2. The pressure detection device of claim 1, further comprising a housing, wherein the flexible circuit board is accommodated in the housing, a cavity is disposed on a side of the housing corresponding to the pressure sensor, and the cavity communicates the pressure sensor with an external space.
3. The pressure detection device according to claim 1, wherein a reinforcing sheet is provided on a side of the first portion of the flexible circuit board facing away from the component, and the number of circuit layers of the first portion of the flexible circuit board is greater than or equal to that of the second portion.
4. The pressure detecting device according to claim 1, wherein an adhesive is filled between adjacent first portions of the flexible circuit board for shaping.
5. The pressure detecting device according to claim 1, wherein the electric energy receiving circuit comprises a coupling coil and a power circuit, the signal transmitting circuit comprises a microcontroller, a load modulation circuit and the coupling coil, the coupling coil is used for receiving external electric energy and transmitting a detection signal of the pressure sensor, an input end of the power circuit is connected with the coupling coil, an output end of the power circuit is respectively connected with the microcontroller and the pressure sensor, the microcontroller is respectively connected with the load modulation circuit and the pressure sensor, an input end of the load modulation circuit is connected with the microcontroller, and an output end of the load modulation circuit is connected with the coupling coil.
6. The pressure detecting apparatus according to claim 1, wherein the electric energy receiving circuit includes a coupling coil and a power circuit, the signal transmitting circuit includes a wireless communication chip and an antenna, the coupling coil is used for receiving external electric energy, an input terminal of the power circuit is connected to the coupling coil, an output terminal of the power circuit is connected to the wireless communication chip and the pressure sensor, respectively, an input terminal of the wireless communication chip is connected to the pressure sensor, and an output terminal of the wireless communication chip is connected to the antenna.
7. The pressure detecting device according to claim 5 or 6, wherein the coupling coil includes a magnetic rod and a coil wound around the periphery of the magnetic rod, the magnetic rod is disposed along a height direction of the pressure detecting device, the pressure sensor is disposed outside the first portion at the most lateral side of the flexible circuit board, the magnetic rod is disposed outside the first portion at the other most lateral side of the flexible circuit board, and two ends of the coil are connected to the pins on the flexible circuit board.
8. The pressure detection device of claim 1, wherein the pressure sensor comprises a die and a flexible package layer, the die is fixed on the flexible circuit board and electrically connected to the pins on the flexible circuit board, and the flexible package layer covers the die.
9. An implantable medical device comprising a pressure detection apparatus according to any of claims 1-8.
10. A pressure monitoring system comprising a transceiver and a pressure detecting device according to any one of claims 1 to 8, the transceiver being wirelessly connected to the pressure detecting device, the transceiver being configured to provide electrical energy to an electrical energy receiving circuit of the pressure detecting device and to receive a pressure detecting signal transmitted by a signal transmitting circuit of the pressure detecting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211262048.0A CN115615582A (en) | 2022-10-14 | 2022-10-14 | Pressure detection device, system and implantable medical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211262048.0A CN115615582A (en) | 2022-10-14 | 2022-10-14 | Pressure detection device, system and implantable medical device |
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| Publication Number | Publication Date |
|---|---|
| CN115615582A true CN115615582A (en) | 2023-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211262048.0A Pending CN115615582A (en) | 2022-10-14 | 2022-10-14 | Pressure detection device, system and implantable medical device |
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| CN (1) | CN115615582A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112885789A (en) * | 2021-01-07 | 2021-06-01 | 浙江荷清柔性电子技术有限公司 | Flexible pneumatic pressure measuring device and manufacturing method thereof |
| CN112885789B (en) * | 2021-01-07 | 2024-07-05 | 浙江荷清柔性电子技术有限公司 | Flexible pneumatic pressure measuring device and manufacturing method thereof |
-
2022
- 2022-10-14 CN CN202211262048.0A patent/CN115615582A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112885789A (en) * | 2021-01-07 | 2021-06-01 | 浙江荷清柔性电子技术有限公司 | Flexible pneumatic pressure measuring device and manufacturing method thereof |
| CN112885789B (en) * | 2021-01-07 | 2024-07-05 | 浙江荷清柔性电子技术有限公司 | Flexible pneumatic pressure measuring device and manufacturing method thereof |
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