Directional Antenna Selection for Capsule Medical Systems
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Solution Overview
Problem
Conventional medical systems using coil antennas in capsule type medical apparatus and dipole or loop antennas externally suffer from deteriorated transmission/receiving sensitivity due to directional dependencies, leading to inaccurate data transmission and reception between the capsule and external machines.
Innovation Solution
A medical system with a capsule type medical apparatus having a first antenna outputting a radio wave with directionality, an external antenna system comprising two directional antennas with different polarized wave directions, and a selection unit in the external machine to choose the optimal antenna based on detected tilt angles or reception strengths to ensure consistent communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single directional antenna is used for external communication, then the antenna configuration is simple, but the reception sensitivity deteriorates when the subject's posture changes
Solution Approach 1:
The patent combines multiple directional antennas with different polarized wave directions into a single external antenna system. This allows the system to maintain simple portability while overcoming directional limitations by having multiple antenna elements that can handle different polarization orientations when the subject moves or changes posture.
Solution Approach 2:
The external antenna is designed with multiple antenna elements that can serve different functions depending on the subject's posture. Each antenna element is optimized for specific polarized wave directions, allowing the single external antenna structure to universally handle various communication scenarios regardless of how the subject positions themselves.
2Volume of moving object
If a coil antenna is used in the capsule type medical apparatus, then the antenna gain is high in small size, but the transmission/receiving sensitivity becomes directional and posture-dependent
Solution Approach 1:
The patent combines multiple directional antennas with different polarized wave directions into a single external antenna system. This allows the system to maintain simple portability while overcoming directional limitations by having multiple antenna elements that can handle different polarization orientations when the subject moves or changes posture.
Solution Approach 2:
The system dynamically selects or switches between different antenna elements based on the detected reception strength or subject posture. This dynamic adaptation allows the external antenna to maintain optimal communication performance regardless of how the capsule's orientation changes inside the subject's body.
3Ease of operation
If the external antenna is portably attached to the subject, then the system allows subject movement, but the reception sensitivity varies with positional changes
Solution Approach 1:
The system dynamically selects or switches between different antenna elements based on the detected reception strength or subject posture. This dynamic adaptation allows the external antenna to maintain optimal communication performance regardless of how the capsule's orientation changes inside the subject's body.
Solution Approach 2:
The patent incorporates reception strength detection to provide feedback about the current communication quality. Based on this feedback, the system can identify when reception sensitivity deteriorates due to posture changes and automatically adjust by selecting a more suitable antenna element, thereby maintaining reliable communication during subject movement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration ensures stable and efficient data transmission and reception between the capsule and external machines, independent of the subject's posture, by selecting the antenna with the highest reception strength, thereby overcoming directional limitations and maintaining communication integrity.
Implementation Method 1
a first antenna which outputs a radio wave having directionality in a first polarized wave direction
Implementation Method 2
a second antenna having directionality to a second polarized wave direction and a third antenna that is disposed together with the second antenna and has directionality to a third polarized wave direction
Data Source
AI summary
A medical system includes a capsule type medical apparatus introduced into a subject and having an antenna having directionality and a communication unit which executes a communication through the antenna, an external antenna, which is disposed outside of the subject and has an antenna having directionality and an antenna disposed together with the antenna and having directionality in a direction different from the antenna, and an external machine having a selection unit which selects any of the antennas in the external antenna and a second communication unit which executes a communication with the first communication unit through the antenna whose polarized wave surface is selected by the selection unit.