CN113440086A

CN113440086A - Magnetic control and wireless charging system

Info

Publication number: CN113440086A
Application number: CN202110322365.6A
Authority: CN
Inventors: 王闯; 史岩; 王子华
Original assignee: Beijing Shanxing Medical Technology Co ltd
Current assignee: Beijing Shanxing Medical Technology Co ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-09-28
Also published as: WO2022198976A1

Abstract

The invention relates to a magnetic control and wireless charging system, relates to the technical field of medical instruments, and is used for supporting a medical device to realize larger image resolution and frame rate and longer working time. The magnetic control and wireless charging system comprises a medical device and a magnetic field driving device, wherein the magnetic field driving device comprises a plurality of groups of driving coils; the driving coil can generate a magnetic field to drive the medical device to adjust the posture and the orientation, and meanwhile, the driving coil can be used as a wireless transmitting coil to supply power to the medical device, and efficient wireless charging can be achieved, so that the medical device has larger image resolution and frame rate and longer working time.

Description

Magnetic control and wireless charging system

Technical Field

The invention relates to the technical field of medical instruments, in particular to a magnetic control and wireless charging system.

Background

For the capsule type device for in vivo examination, a mechanical arm mode is generally adopted to drive a permanent magnet to control the movement of the capsule, for example, the device and the method for controlling the movement of the capsule endoscope in the digestive tract of the human body disclosed in the Chinese patent CN201510567611.9, the speed of controlling the movement of the capsule is slower. In addition, the conventional capsule device generally adopts a battery-powered manner to provide energy, such as the antenna structure of the dual-lens capsule endoscope disclosed in chinese patent CN202020507120.1, but the battery-powered manner has a limited volume, so that the battery power is limited, and thus, the conventional capsule device cannot provide a larger image resolution and frame rate and a longer working time.

Disclosure of Invention

The invention provides a magnetic control and wireless charging system which is used for supporting a medical device to achieve larger image resolution and frame rate and longer working time.

The invention provides a magnetic control and wireless charging system, comprising:

a medical device for being placed in a body cavity of a subject and acquiring information of a specified position in the body cavity; and

a magnetic field driving device comprising a plurality of groups of driving coils;

wherein the drive coil is capable of generating a magnetic field to control the medical device to move in a specified direction; the drive coil provides energy to the medical device in a wireless power supply manner.

In one embodiment, a receive coil is provided in the medical device, the drive coil being in selective communication with a resonant circuit;

when the drive coil is in communication with the resonant circuit, the drive coil resonates with the receive coil to provide energy to the medical device.

In one embodiment, the plurality of groups of drive coils comprises a first coil group, a second coil group, and a third coil group;

the first coil group is arranged along the axial direction of the body of the examinee and is used for generating a gradient magnetic field or a magnetic field with uniform strength along the axial direction of the body of the examinee; the second coil group and the third coil group are respectively distributed around the body of the examinee and used for generating gradient magnetic fields or magnetic fields with uniform strength;

wherein the first, second, and third coil sets generate magnetic fields that control changes in the pose and position of the medical device, and one or more of the first, second, and third coil sets are in selective communication with the corresponding resonant circuits, respectively.

In one embodiment, the magnetic field driving apparatus further comprises a fourth coil set disposed axially around the subject's body for generating a magnetic field of uniform strength; the fourth coil set is in selective communication with the resonant circuit.

In one embodiment, the drive coil is selectively connected to an independently programmable power control device, and the drive coil is not in communication with the power control device and the resonant circuit at the same time.

In one embodiment, the wireless charging frequency of the drive coil is no less than 100KHz when the drive coil is wirelessly powered to energize the medical device.

In one embodiment, the medical device is a capsule device.

In one embodiment, an image signal acquisition circuit, a wireless communication circuit, an energy storage circuit and a wireless power supply modulation circuit are arranged in the capsule device;

the image signal acquisition circuit is connected with the wireless communication circuit so as to transmit signals through the wireless communication circuit;

the wireless power supply modulation circuit is respectively connected with the receiving coil and the energy storage circuit so as to input the energy of the receiving coil into the energy storage circuit for storage, and the energy storage circuit is also connected with the wireless communication circuit and other circuits so as to supply power for the magnetic control and wireless charging system.

In one embodiment, one or more magnets are arranged inside the capsule device, and a plurality of magnets are respectively positioned at different parts of the capsule device; the polarization direction of the magnet is parallel or perpendicular to the axial direction of the capsule type device.

In one embodiment, the receiving coil is one or more, and the axial direction of the receiving coil is perpendicular or parallel to the axial direction of the capsule type device;

the receiving coils are respectively positioned at different parts of the capsule device, and can independently receive energy in different directions and simultaneously receive the energy.

Compared with the prior art, the invention has the advantages that: the driving coil can generate a magnetic field to drive the medical device to adjust the posture and the orientation, and meanwhile, the driving coil can be used as a wireless transmitting coil to supply power to the medical device, and efficient wireless charging can be achieved, so that the medical device has larger image resolution and frame rate and longer working time.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a usage state of a magnetic control and wireless charging system in an embodiment of the invention;

FIG. 2 is a perspective view of a magnetic field driving apparatus in an embodiment of the present invention;

FIG. 3 is a schematic diagram showing the connection relationship between the magnetic field driving device and the resonant circuit and the power supply control device according to the embodiment of the present invention;

fig. 4 is a schematic view of the structure of a medical device in an embodiment of the invention.

Reference numerals:

1-a medical device; 11-a magnet; 12-a receiving coil; 13-an image signal acquisition circuit; 14-wireless power supply modulation circuit; 15-a tank circuit; 16-wireless communication circuitry; 17-a housing; 171-top end cap; 172-a body;

2-a magnetic field driving device; 20-driving coils; 21-a first coil group; 22-a second coil assembly; 23-a third coil set; 24-a fourth coil group; 25-a resonant circuit; 26-a power supply control device; 27-a switch;

3-a movable examination bed; 4-the subject.

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in fig. 1 to 4, the present invention provides a magnetic control and wireless charging system, which comprises a medical device 1 and a magnetic field driving device 2, wherein the medical device 1 is used for being placed in the body cavity of a detected person 4 and acquiring the information of a specified position in the body cavity. The magnetic field driving device 2 can generate a magnetic field outside the examinee 4 and apply acting force to the medical device, and the medical device 1 can move in a specified direction under the driving of the external magnetic field to complete corresponding examination. Furthermore, the magnetic field driving device 2 is capable of supplying energy to the medical device 1 in a wireless power supply manner, thereby enabling the medical device 1 to have a larger image resolution and frame rate and a longer operation time.

Specifically, the magnetic field driving device 2 includes a plurality of sets of driving coils 20, and the driving coils 20 can generate magnetic fields to control the medical device 1 to move in a specified direction. Furthermore, the drive coil 20 may also be powered wirelessly as a transmission coil into the medical device 1.

The medical device 1 is provided with a receiving coil 12, and as shown in fig. 3, the driving coil 20 is in selective communication with the resonance circuit 25. When the driving coil 20 communicates with the resonance circuit 25, the resonance circuit 25 makes the driving coil 20 and the receiving coil 12 have the same frequency, so that the driving coil 20 and the receiving coil 12 resonate, and efficient wireless charging can be achieved.

It should be noted that the wireless charging frequency of the driving coil 20 is not lower than 100KHz when the driving coil supplies energy to the medical device 1 in a wireless power supply mode.

The medical device 1 may be a capsule device that can be scanned into the alimentary tract of the subject 4 to obtain real-time images.

The present invention will be described in detail below, taking the medical device 1 as a capsule device as an example.

As shown in fig. 1 and 2, the magnetic field driving device 2 includes a first coil group 21, a second coil group 22, and a third coil group 23 that are orthogonal to each other. The first coil group 21 is disposed along the body axial direction of the subject 4, and is used to generate a gradient magnetic field or a magnetic field of uniform strength along the body axial direction of the subject 4. The second coil group 22 and the third coil group 23 are respectively distributed around the circumference of the body of the subject 4 for generating a gradient magnetic field or a magnetic field of uniform strength.

Wherein a change in the current strength and/or direction in the first, second and

third coil groups

21, 22, 23 may control a change in the pose and position of the medical apparatus 1.

And one or more of the first, second and

third coil groups

21, 22 and 23 are in selective communication with a corresponding resonant circuit 25, respectively. So that each of the first coil group 21, the second coil group 22 and the third coil group 23 individually supplies power to the receiving coil 12 as a transmitting coil, and also supplies power to the receiving coil 12 as a transmitting coil at the same time.

Further, the magnetic field driving apparatus 2 further includes a fourth coil group 24 disposed axially around the body of the subject 4 for generating a magnetic field of uniform strength; the current intensity and/or direction in the fourth coil set 24 is changed to control the rotational orientation of the medical device 1 along the axial direction of the subject's 4 body.

The fourth coil set 24 is helical and may therefore also be referred to as a solenoid coil. Like the other three coil sets, the fourth coil set 24 may also communicate with the resonant circuit 25 as a transmitting coil to supply power to the receiving coil 12.

The drive coil 20 may also be connected to a power control device 26. Specifically, the first coil group 21, the second coil group 22, the third coil group 23, and the fourth coil group 24 are respectively connected to an independently programmable power supply control device 26, so that the direction and magnitude of the current of each coil are independently controlled.

As shown in fig. 3, the driving coil 20 is not communicated with the power supply control device 26 and the resonance circuit 25 at the same time. The switch 27 can selectively connect the driving coil 20 to the power control device 26 or connect the driving coil 20 to the resonance circuit 25.

The first coil group 21 may be provided with at least two first coils 211, as shown in fig. 2, the two first coils 211 being oppositely disposed in the Z direction. Wherein the Z direction is the body axial direction of the subject 4 (i.e., the direction from the foot to the head of the subject).

When the currents in the two first coils 211 are in the same direction, a magnetic field with uniform intensity is generated; when the currents in the two first coils 211 are reversed, a gradient magnetic field is generated. I.e., the two first coils 211 may be helmholtz-type coils, other coil (e.g., maxwell coils) configurations may also be used to achieve different results, and may include altering the number of coils, the diameter of the coils, the number of turns in each coil, or the degree of coil separation and inclination.

In the helmholtz coil, two first coils 211 are positioned coaxially and in parallel. The distance between the two first coils 211 is substantially equal to their diameter. To ensure maximum operating efficiency, the two first coils 211 should be substantially the same diameter.

To address the high impedance limitations associated with larger diameter and multi-turn transmission coils, the first coil 211 may be divided into a plurality of smaller coil segments, which may be identical, connected in parallel.

Likewise, the second coil group 22 may be provided with at least two second coils 221, the two second coils 221 being oppositely disposed in the X direction, wherein the X direction is the body circumferential direction of the subject 4 (i.e., the direction along the right arm to the left arm of the subject). Wherein, when the currents in the two second coils 221 are in the same direction, a magnetic field with uniform intensity is generated; when the currents in the two second coils 221 are reversed, a gradient magnetic field is generated. The third coil group 23 may be provided with at least two third coils 231, the two third coils 231 being oppositely disposed in the Y direction, wherein the Y direction is the body circumferential direction of the subject 4 (i.e., the direction along the back to the face of the subject). Wherein, when the currents in the two third coils 231 are in the same direction, a magnetic field with uniform intensity is generated; when the currents in the two third coils 231 are reversed, a gradient magnetic field is generated. The X direction, the Y direction and the Z direction form a three-dimensional rectangular coordinate system.

The second coil 221 and the third coil 231 may be arranged in a similar manner as the first coil 211.

Therefore, the first coil group 21, the second coil group 22, and the third coil group 23 being orthogonal to each other means that the connecting line of the two first coils 211, the connecting line of the two second coils 221, and the connecting line of the two third coils 231 are perpendicular to each other.

The intensity and direction of the magnetic field generated by the corresponding coil group can be changed by controlling the intensity and direction of the current passing through each coil to be changed. For example, the first coil group 21 may generate a gradient magnetic field in the body axial direction of the subject 4, so that the movement of the medical device 1 in the body axial direction thereof within the body cavity of the subject 4 can be controlled. The second coil group 22 and the third coil group 23 can generate magnetic fields (or gradient magnetic fields) having uniform strength, so that the medical device 1 can be controlled to perform rotational movement (or movement) around the body circumference direction in the body cavity of the subject 4. When the intensity and direction of the current passing through the fourth coil group 24 are changed, the intensity and direction of the magnetic field in the coils are also changed, so that the rotational orientation of the medical device 1 along the axial direction of the body of the subject 4 can be controlled.

As shown in fig. 1 and 2, the magnetic field drive apparatus 2 further includes an examination channel for passing a movable examination couch 3 carrying a subject 4 therethrough. The subject 4 needs to swallow the medical device 1 and then lies on the movable examination bed 3. The movable bed 3 is moved so that the stomach of the subject 4 is within the magnetic field coverage of the magnetic field driving device 2.

The medical device 1 (capsule type device) includes a casing 17, and an image signal acquisition circuit 13, a wireless communication circuit 16, an energy storage circuit 15, and a wireless power supply modulation circuit 14 are provided in the casing 17. The image signal acquisition circuit 13 is connected to the wireless communication circuit 16 to transmit signals through the wireless communication circuit 16. The wireless communication circuit 16 is also connected to a wireless receiving circuit so that the signal of the image signal acquiring circuit 13 is displayed on a display screen through the wireless receiving circuit.

The wireless power supply modulation circuit 14 is respectively connected with the receiving coil 12 and the energy storage circuit 15, so that the energy of the receiving coil 12 is input into the energy storage circuit 15 for storage. The tank circuit 15 is also connected to the wireless communication circuit 16 and other circuits to supply power to the circuits as a power source.

The interior of the housing 17 of the medical device 1 (capsule device) is provided with one or more magnets 11, the plurality of magnets 11 being located at different locations in the housing 17 of the capsule device, respectively. The polarization direction of the magnet 11 is parallel or perpendicular to the axial direction of the housing 17 of the capsule type device. In the embodiment shown in fig. 4, the direction of polarization of the magnet 11 is parallel to the axial direction of the housing 17. The magnet 11 is capable of providing torque and magnetic force to the medical device 1 under the influence of the magnetic field generated by the driving coil 20, and performing rotation, movement, orientation, and other movements within the alimentary tract of the subject 4.

The receiving coil 12 may be one or more, and the axial direction of the receiving coil 12 is perpendicular or parallel to the axial direction of the housing 17 of the capsule type device. The plurality of receiving coils 12 are respectively located at different positions in the housing 17 of the capsule device, and the plurality of receiving coils 12 can receive the energy of one or more sets of driving coils 20 in different directions independently and can also receive the energy of multiple sets of driving coils 20 simultaneously.

The capsule device case 17 includes a hemispherical top end cap 171 formed of a light-transmissive member and a cylindrical body 172 having a hemispherical end portion. Inside the top end cover 171, an image signal acquisition circuit 13 having a camera and an illumination element is disposed so that an image of the digestive tract can be taken.

In some alternative embodiments, the capsule device may further include one or more sensor circuits, which may be located outside the housing 17 or independent from the housing 17. These sensor circuits may include a single sensor circuit for sensing a particular physiological or neurological parameter associated with a patient in order to sense one or more physiological parameters associated with the patient.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A magnetic control and wireless charging system, comprising:

a medical device (1) for placing inside a body cavity of a subject (4) and acquiring information of a specified position inside the body cavity; and

a magnetic field drive device (2), the magnetic field drive device (2) comprising a plurality of sets of drive coils (20);

wherein the drive coil (20) can generate a magnetic field to control the medical device (1) to move according to a specified direction; the drive coil (20) supplies energy to the medical device (1) in a wireless power supply manner.

2. The magnetic and wireless charging system according to claim 1, characterized in that a receiving coil (12) is provided in the medical device (1), the driving coil (20) being in selective communication with a resonant circuit (25);

when the drive coil (20) is in communication with the resonant circuit (25), the drive coil (20) resonates with the receive coil (12) to provide energy to the medical device (1).

3. The magnetically controlled and wireless charging system according to claim 2, wherein the plurality of sets of drive coils (20) comprises a first coil set (21), a second coil set (22), and a third coil set (23);

the first coil group (21) is arranged along the body axial direction of the examinee (4) and is used for generating a gradient magnetic field or a magnetic field with uniform strength along the axial direction of the examinee (4); the second coil group (22) and the third coil group (23) are respectively distributed around the body of the examinee (4) and used for generating gradient magnetic fields or magnetic fields with uniform strength;

wherein the first coil group (21), the second coil group (22) and the third coil group (23) generate magnetic fields that control changes in the attitude and position of the medical device (1), and one or more of the first coil group (21), the second coil group (22) and the third coil group (23) are in selective communication with the corresponding resonance circuit (25), respectively.

4. The magnetic and wireless charging system according to claim 2 or 3, wherein the magnetic field driving device (2) further comprises a fourth coil group (24) disposed axially around the body of the subject (4) for generating a magnetic field of uniform strength; the fourth coil set (24) is in selective communication with a resonant circuit (25).

5. The magnetically controlled and wireless charging system according to claim 2, wherein the drive coil (20) is selectively connected to an independent programmable power control device (26), and the drive coil (20) is not in communication with the power control device (26) and the resonant circuit (25) simultaneously.

6. The magnetically controlled and wireless charging system according to any of claims 1-3, wherein the wireless charging frequency of the drive coil (20) when powered wirelessly to the medical device (1) is not lower than 100 KHz.

7. The magnetically controlled and wireless charging system according to claim 2 or 3, characterized in that the medical device (1) is a capsule device.

8. The magnetic control and wireless charging system according to claim 7, wherein an image signal acquisition circuit (13), a wireless communication circuit (14), an energy storage circuit (15) and a wireless power supply modulation circuit (16) are arranged in the capsule device;

the image signal acquisition circuit (13) is connected with the wireless communication circuit (14) so as to transmit signals through the wireless communication circuit (14);

the wireless power supply modulation circuit (16) is respectively connected with the receiving coil (12) and the energy storage circuit (15) so as to input the energy of the receiving coil (12) into the energy storage circuit (15) for storage, and the energy storage circuit (15) is also connected with the wireless communication circuit and other circuits so as to supply power for the magnetic control and wireless charging system.

9. The magnetically controlled and wireless charging system according to claim 7, wherein one or more magnets (11) are provided inside the capsule, a plurality of the magnets (11) being located at different parts of the capsule, respectively; the polarization direction of the magnet (11) is parallel or perpendicular to the axial direction of the capsule type device.

10. The magnetically controlled and wireless charging system according to claim 7, wherein the receiving coil (12) is one or more, and the axial direction of the receiving coil (12) is perpendicular or parallel to the axial direction of the capsule device;

wherein, the receiving coils (12) are respectively positioned at different parts of the capsule type device, and the receiving coils (12) can receive energy in different directions independently and can also receive energy simultaneously.