CN114284706A - Double-lens capsule - Google Patents
Double-lens capsule Download PDFInfo
- Publication number
- CN114284706A CN114284706A CN202111679346.5A CN202111679346A CN114284706A CN 114284706 A CN114284706 A CN 114284706A CN 202111679346 A CN202111679346 A CN 202111679346A CN 114284706 A CN114284706 A CN 114284706A
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- Prior art keywords
- lens
- circuit board
- antenna
- capsule
- dual
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- 239000002775 capsule Substances 0.000 title claims abstract description 60
- 239000002184 metal Substances 0.000 claims description 8
- 230000009977 dual effect Effects 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 230000005855 radiation Effects 0.000 abstract description 21
- 238000004891 communication Methods 0.000 abstract description 14
- 239000007769 metal material Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000001839 endoscopy Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Abstract
The invention discloses a double-lens capsule, comprising: the first lens and the second lens are respectively arranged at two ends of the capsule, the battery and the circuit board are sequentially arranged between the first lens and the second lens, and the spiral antenna is arranged on the periphery of the circuit board and connected with the circuit board. The spiral antenna is adopted in the double-lens capsule, and is arranged on the periphery of the circuit board, and the current on the side surface of the circuit board is small, so that the interference of the circuit board on the radiation signal of the antenna can be reduced, the reflection of the metal material on the surface of the battery on the radiation signal can be reduced, the integral radiation efficiency of the antenna can be improved, the communication quality of the capsule system can be guaranteed, and the communication distance between the capsule system and a recorder is increased.
Description
Technical Field
The invention relates to the technical field of capsule endoscopy, in particular to a double-lens capsule.
Background
The problem of twin-lens capsule communication is always a big difficulty which puzzles the design of twin-lens capsules, because the twin-lens capsule has lenses on both sides, is restricted by the structure, the antenna in the prior art can only be designed in the middle of the capsule, and is specifically arranged between the battery and the circuit board (as shown in figure 1), but because the circuit board has current which can interfere the antenna, and the surface of the battery is made of metal material, and has the function of reflection to the radiation signal, the radiation efficiency of the antenna is poor, and the communication distance between the twin-lens capsule and the recorder is short.
In view of the above, how to provide a dual lens capsule that solves the above technical problems becomes a problem to be solved by those skilled in the art.
Disclosure of Invention
The embodiment of the invention aims to provide a double-lens capsule, which can improve the integral radiation efficiency of an antenna in the using process, is favorable for ensuring the communication quality of a capsule system and increasing the communication distance between the capsule system and a recorder.
In order to solve the above technical problem, an embodiment of the present invention provides a dual-lens capsule, including: the first lens and the second lens are respectively arranged at two ends of the capsule, the battery and the circuit board are sequentially arranged between the first lens and the second lens, and the spiral antenna is arranged on the periphery of the circuit board and connected with the circuit board.
Optionally, the antenna further comprises a shielding framework arranged on the periphery of the circuit board, and the helical antenna is arranged on the outer side wall of the shielding framework.
Optionally, the inner side wall of the shielding framework is provided with a ground plane.
Optionally, the ground plane is a grounded plating metal layer.
Optionally, the antenna further comprises a coaxial line corresponding to the helical antenna, the helical antenna is connected to the circuit board through one end of the coaxial line, and the outer conductor of the coaxial line is connected to the ground plane.
Optionally, the helical antenna is tightly wound on the outer side wall of the shielding framework.
Optionally, the shielding framework is made of polytetrafluoroethylene.
The embodiment of the invention provides a double-lens capsule, which comprises: the first lens and the second lens are respectively arranged at two ends of the capsule, the battery and the circuit board are sequentially arranged between the first lens and the second lens, and the spiral antenna is arranged on the periphery of the circuit board and connected with the circuit board.
Therefore, the helical antenna is adopted in the dual-lens capsule in the embodiment of the invention and is arranged at the periphery of the circuit board, and because the interference current of the side surface of the circuit board is smaller, the interference of the circuit board on the radiation signal of the antenna can be reduced, the reflection of the metal material on the surface of the battery on the radiation signal can be reduced, the integral radiation efficiency of the antenna can be improved, the communication quality of the capsule system can be ensured, and the communication distance between the capsule system and a recorder can be increased.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a conventional dual-lens capsule;
fig. 2 is a schematic structural diagram of a dual-lens capsule according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a dual lens capsule according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a helical antenna and a shielding skeleton of a dual-lens capsule according to an embodiment of the present invention;
FIG. 5 is a circularly symmetric pattern corresponding to the plane of the helical axis of the helical antenna according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a helical antenna according to an embodiment of the present invention;
fig. 7 is a schematic diagram corresponding to fig. 6.
Detailed Description
The embodiment of the invention provides a double-lens capsule, which can improve the overall radiation efficiency of an antenna in the using process, is beneficial to ensuring the communication quality of a capsule system and increasing the communication distance between the capsule system and a recorder.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a dual-lens capsule according to an embodiment of the present invention. The double-lens capsule comprises: the capsule comprises a first lens 1 and a second lens 2 which are respectively arranged at two ends of the capsule, a battery 3 and a circuit board 4 which are sequentially arranged between the first lens 1 and the second lens 2, and a spiral antenna 5 which is arranged at the periphery of the circuit board 4 and is connected with the circuit board 4.
It should be noted that, in the dual-lens capsule of the embodiment of the present invention, the first lens 1 and the second lens 2 are disposed at two ends of the capsule, and the battery 3 and the circuit board 4 are sequentially disposed between the first lens 1 and the second lens 2, the antenna in the embodiment of the present invention employs the spiral antenna 5, the spiral antenna 5 can be disposed on the periphery of the circuit board 4 and connected to the circuit board 4, and since the interference current on the side of the circuit board 4 is small, the spiral antenna 5 disposed on the periphery of the circuit board 4 can reduce the influence of the current in the circuit board 4 on the radiation signal of the spiral antenna 5. In addition, the spiral antenna 5 is arranged on the periphery of the circuit board 4 and is far away from the battery, so that the reflection of a metal material on the surface of the battery to a radiation signal can be reduced, and the improvement of the overall radiation efficiency of the spiral antenna 5 is facilitated.
Further, please refer to fig. 3 to 4. The dual lens capsule may further include a shielding frame 6 disposed at the periphery of the circuit board 4, and the helical antenna 5 is disposed on an outer sidewall of the shielding frame 6.
Specifically, in the embodiment of the present invention, in order to further reduce the influence of the current in the circuit board 4 on the radiation signal of the helical antenna 5, a shielding framework 6 may be disposed on the periphery of the circuit board 4, the helical antenna 5 is disposed on an outer side wall of the shielding framework 6, and specifically, the helical antenna 5 may be tightly wound on the outer side wall of the shielding framework 6, and the shielding framework 6 is used to shield an interference signal generated by the current of the circuit board 4, so as to improve the signal radiation efficiency of the helical antenna 5, and further improve the communication quality of the capsule system.
The shielding framework 6 may be made of teflon, so as to further improve the shielding effect of the interference signal generated by the current in the circuit board 4.
Furthermore, the inner side wall of the shielding framework 6 in the embodiment of the invention is provided with a ground plane 7, wherein the ground plane 7 is a grounded electroplated metal layer.
It should be noted that, specifically, the electroplated metal layer can be manufactured on the inner wall of the shielding framework 6 in a manner of electroplating metal powder, and the electroplated metal layer is grounded to serve as a ground plane 7 of the helical antenna 5, a metal helical line with good conductivity is fixed on the shielding framework 6, the helical antenna 5 and the shielding framework 6 can be integrally formed, the design of the ground plane 7 can effectively improve the signal gain of the helical antenna 5 in the dual-lens capsule, the radiation level of the capsule antenna is effectively improved, and the communication quality of the capsule system is ensured.
Furthermore, the dual-lens capsule in the embodiment of the present invention may further include a coaxial line corresponding to the helical antenna 5, the helical antenna 5 is connected to the circuit board 4 through one end of the coaxial line, and the outer conductor side of the coaxial line is connected to the ground plane.
It can be understood that the helical antenna is a helical antenna, and adopts a coaxial line for feeding, and in practical application, in order to better shield external interference signals, the helical antenna can also be arranged on the coaxial line corresponding to the helical antenna 5, and is connected with one end of the helical antenna through the core line of the coaxial line, and the outer conductor side of the coaxial line is connected with the ground plane.
The advantages of the helical antenna are described below:
the helical antenna 5 in the embodiment of the present invention has the characteristics of wide frequency band, circular polarization and low profile, so that the circularly polarized antenna can receive incoming waves of any polarization, and radiation waves of the incoming waves can be received by any polarized antenna, the circularly polarized antenna has the rotation direction orthogonality, when the polarized waves enter a symmetric target (such as a plane, a spherical surface, etc.), the rotation direction is reversed, and electromagnetic waves of different rotation directions have polarization isolation with a large numerical value.
The design of the spiral antenna 5 in the embodiment of the invention can realize impedance matching between the antenna and the feeder line, the characteristic impedance of the transmitting antenna and the feeder line is equal when the signal is transmitted, and the best signal gain can be obtained:
wherein, the input impedance expression is as follows:
The helical antenna 5 in the embodiment of the present invention has a figure-8 directional pattern on the plane containing the helical axis, has maximum radiation on the plane perpendicular to the helical axis, and obtains a circularly symmetric directional pattern on the plane (as shown in fig. 5), so that the image signal transmitted back by the capsule can be received by the external recorder of the dual-lens capsule no matter the capsule is in vivo at any angle.
Specifically, referring to fig. 6 and 7, the principle of the helical antenna is as follows:
where D in fig. 6 and 7 denotes the diameter of the helical antenna, L denotes the length of the helical antenna, ρ denotes the pitch, I and II denote the corresponding two points on the helical antenna, respectively, C denotes the speed of light, and θ denotes the lead angle of the pitch.
The electromagnetic wave moves at a constant speed at the light speed C along the metal spiral line, and a spiral is formed from a point I to a point II, and the required time is as follows:
T＝πD/C
for the helical antenna, the axial electromagnetic wave only moves and advances by one pitch ρ, and the axial equivalent rate is:
υ＝ρ/t＝ρ/C(πD)
specifically, as shown in fig. 7, υ Csin θ ═ cpp/(π D) ≦ C
It can be seen from the above formula that υ is always less than or equal to C, so the helical antenna can slow down the movement speed of electromagnetic waves, and is a slow wave system, and the equivalent wavelength λ of the slow wave system is equivalently less than the working wavelength λ. For the helical antenna, it should resonate at its 1/4 equivalent wavelength, thus shortening the geometric length of the helical antenna.
In practical applications, for a dual lens capsule operating at a certain center frequency, the number of coils N required to be wound by the helical antenna can be approximated by the following formula:
Therefore, the helical antenna is adopted in the dual-lens capsule in the embodiment of the invention and is arranged at the periphery of the circuit board, and because the current of the side surface of the circuit board is smaller, the interference of the circuit board on the antenna radiation signal can be reduced, the reflection of the metal material on the surface of the battery on the radiation signal can be reduced, the integral radiation efficiency of the antenna can be improved, the communication quality of the capsule system can be ensured, and the communication distance between the capsule system and a recorder can be increased.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A dual lens capsule, comprising: the first lens and the second lens are respectively arranged at two ends of the capsule, the battery and the circuit board are sequentially arranged between the first lens and the second lens, and the spiral antenna is arranged on the periphery of the circuit board and connected with the circuit board.
2. The dual-lens capsule according to claim 1, further comprising a shielding frame disposed at a periphery of the circuit board, wherein the helical antenna is disposed on an outer sidewall of the shielding frame.
3. The dual-lens capsule according to claim 2, wherein the inner side wall of the shielding frame is provided with a ground plane.
4. The dual lens capsule of claim 3, wherein the ground plane is a grounded plated metal layer.
5. The dual lens capsule according to claim 3, further comprising a coaxial line corresponding to the helical antenna, wherein the helical antenna is connected to the circuit board through one end of the coaxial line, and an outer conductor side of the coaxial line is connected to the ground plane.
6. The dual-lens capsule according to claim 2, wherein the helical antenna is tightly wound on an outer sidewall of the shielding bobbin.
7. The dual-lens capsule according to claim 2, wherein the shielding frame is made of polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111679346.5A CN114284706B (en) | 2021-12-31 | 2021-12-31 | Double-lens capsule |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111679346.5A CN114284706B (en) | 2021-12-31 | 2021-12-31 | Double-lens capsule |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114284706A true CN114284706A (en) | 2022-04-05 |
| CN114284706B CN114284706B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111679346.5A Active CN114284706B (en) | 2021-12-31 | 2021-12-31 | Double-lens capsule |
Country Status (1)
| Country | Link |
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| CN (1) | CN114284706B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001251132A (en) * | 2000-03-03 | 2001-09-14 | Sharp Corp | Quadrilateral spiral antenna |
| KR20040056425A (en) * | 2002-12-23 | 2004-07-01 | 엘지전자 주식회사 | Helical antenna |
| US20100033709A1 (en) * | 2006-11-21 | 2010-02-11 | Jean-Francois Fernand Lampin | Integrated terahertz antenna and transmitter and/or receiver, and a method of fabricating them |
| CN102089929A (en) * | 2008-05-13 | 2011-06-08 | 萨恩特尔有限公司 | A dielectrically-loaded antenna |
| US20140358140A1 (en) * | 2008-10-21 | 2014-12-04 | Microcube, Llc | Microwave treatment devices and methods |
| US20170115511A1 (en) * | 2015-10-21 | 2017-04-27 | Johnson & Johnson Vision Care, Inc. | Antenna mandrel with multiple antennas |
| US20170149125A1 (en) * | 2015-11-19 | 2017-05-25 | Getac Technology Corporation | Helix antenna device |
| CN209661592U (en) * | 2018-12-14 | 2019-11-22 | 重庆金山医疗器械有限公司 | Double lens type capsule endoscope |
| CN211743378U (en) * | 2020-04-09 | 2020-10-23 | 深圳市资福医疗技术有限公司 | Antenna structure of double-lens capsule endoscope |
-
2021
- 2021-12-31 CN CN202111679346.5A patent/CN114284706B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001251132A (en) * | 2000-03-03 | 2001-09-14 | Sharp Corp | Quadrilateral spiral antenna |
| KR20040056425A (en) * | 2002-12-23 | 2004-07-01 | 엘지전자 주식회사 | Helical antenna |
| US20100033709A1 (en) * | 2006-11-21 | 2010-02-11 | Jean-Francois Fernand Lampin | Integrated terahertz antenna and transmitter and/or receiver, and a method of fabricating them |
| CN102089929A (en) * | 2008-05-13 | 2011-06-08 | 萨恩特尔有限公司 | A dielectrically-loaded antenna |
| US20140358140A1 (en) * | 2008-10-21 | 2014-12-04 | Microcube, Llc | Microwave treatment devices and methods |
| US20170115511A1 (en) * | 2015-10-21 | 2017-04-27 | Johnson & Johnson Vision Care, Inc. | Antenna mandrel with multiple antennas |
| US20170149125A1 (en) * | 2015-11-19 | 2017-05-25 | Getac Technology Corporation | Helix antenna device |
| CN209661592U (en) * | 2018-12-14 | 2019-11-22 | 重庆金山医疗器械有限公司 | Double lens type capsule endoscope |
| CN211743378U (en) * | 2020-04-09 | 2020-10-23 | 深圳市资福医疗技术有限公司 | Antenna structure of double-lens capsule endoscope |
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| Publication number | Publication date |
|---|---|
| CN114284706B (en) | 2024-04-05 |
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