Capsule Endoscope Electrode Selection for Human Body Communication
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Solution Overview
Problem
Capsule type endoscopes experience signal power loss and instability in communication due to impedance mismatch between transmitting electrodes and the human body, leading to reduced reception signal levels and noise interference.
Innovation Solution
A capsule type endoscope with a plurality of electrodes on its surface, an electrode selecting section that chooses electrodes with minimal power loss, and a transmitting section using selected electrodes to stabilize signal transmission, along with an impedance measurement circuit for feedback control to maintain optimal electrode contact and impedance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transmitting electrodes are arranged on the outer surface of the capsule type endoscope, then wireless communication function is achieved, but impedance mismatch occurs and transmission signal power is lost due to varying contact states
Solution Approach 1:
The patent applies dynamics by making the electrode configuration adaptable rather than fixed. Multiple electrodes are arranged on the outer surface, and the system dynamically selects optimal electrode combinations based on real-time impedance measurements. This dynamic adaptation allows the capsule to maintain effective communication despite varying contact states with the body, resolving the contradiction between achieving wireless communication and minimizing signal power loss.
Solution Approach 2:
The patent changes the parameter of electrode selection based on impedance conditions. By measuring impedance between different electrode pairs and selecting combinations with optimal impedance matching, the system adjusts its operational parameters to minimize transmission signal power loss while maintaining wireless communication functionality throughout the body.
2Device complexity
If fixed transmitting electrodes are used in the capsule type endoscope, then device structure is simplified, but communication stability is degraded due to impedance variation during movement
Solution Approach 1:
Rather than using a fixed electrode arrangement, the patent implements a dynamic electrode selection mechanism. Multiple electrodes are provided on the outer surface, and the system actively selects optimal electrode pairs based on real-time impedance measurements. This dynamic approach maintains communication stability during movement through the body while managing device complexity through systematic control.
Solution Approach 2:
The patent employs feedback control by measuring impedance between electrode pairs and using this information to select optimal transmitting electrodes. The impedance measurement results feed back into the electrode selection process, creating a closed-loop system that adapts to changing contact conditions and maintains reliable communication throughout the examination.
3Loss of energy
If impedance mismatch occurs between transmitting electrodes and subject, then transmission signal power is lost, but adding impedance control mechanisms increases device complexity
Solution Approach 1:
The patent implements feedback control by measuring impedance between electrode pairs and using this information to select optimal transmitting electrodes. The impedance measurement results feed back into the electrode selection process, creating a closed-loop system that automatically adapts to changing contact conditions and maintains reliable communication throughout the examination.
Solution Approach 2:
The system performs self-optimization by automatically measuring impedance and selecting the best electrode pairs without external intervention. The capsule endoscope autonomously monitors its own transmission conditions and adjusts electrode selection to minimize power loss, reducing the need for complex external impedance control mechanisms.
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 solution reduces transmission signal power loss and maintains stable communication by selecting optimal electrodes based on impedance feedback, ensuring efficient and noise-resistant signal transmission during movement within the body.
Implementation Method 1
a human body communication mode of utilizing a subject as a signal transmission medium to transmit image data to the outside
Data Source
AI summary
A capsule type endoscope which is introduced into a subject to acquire subject internal information and transmits the acquired subject internal information to the outside through the subject has a plurality of electrodes arranged on an outer peripheral surface thereof. An electrode selecting section selects two electrodes with a small transmission power loss from the plurality of electrodes as transmitting electrodes that are utilized to transmit the subject internal information. A transmitting section uses the two transmitting electrodes selected by the electrode selecting section to transmit the subject internal information to the outside of the subject.