Capsule Endoscopic Receiving Device Optimal Electrode Selection
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Solution Overview
Problem
Capsule endoscopes face challenges in maintaining stable image data reception due to continuous movement within the human body, requiring effective selection of receiving electrode pairs to compensate for changing relative positions and orientations.
Innovation Solution
A capsule endoscopic receiving device with an analog front end, valid signal detection circuit, and preamble processor that selects the optimal receiving electrode pair based on voltage levels and correlation values of preambles to ensure stable image data reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a capsule endoscope transmits signals wirelessly, then the limitation on movement path is reduced and inspection time is increased, but signal transmission stability deteriorates due to continuous movement within the body
Solution Approach 1:
The receiving device is divided into multiple receiving electrodes positioned at different locations on the body surface. Each electrode independently receives signals from the moving capsule, allowing the system to segment the reception task across multiple spatial points to maintain stability despite capsule movement.
Solution Approach 2:
The system dynamically selects the optimal receiving electrode based on real-time signal quality assessment. The receiving electrode selection is not fixed but adapts continuously to the capsule's changing position, making the reception system dynamic rather than static to compensate for capsule movement.
2Reliability
If multiple receiving electrodes are used to counteract position changes, then signal reception stability is improved, but device complexity increases
Solution Approach 1:
Before actual image data transmission, the system performs a preliminary action by transmitting and analyzing a preamble signal through each receiving electrode. This preliminary assessment allows the system to pre-determine which electrode provides the best signal quality, simplifying the subsequent reception process despite having multiple electrodes available.
Solution Approach 2:
The system uses feedback from the preamble signal analysis to automatically select the optimal receiving electrode. The correlation value calculation provides feedback about signal quality, which then guides the selection process, reducing the need for complex manual configuration or continuous monitoring of all electrodes.
3Reliability
If the receiving device actively counteracts position changes, then image reception reliability is improved, but system complexity and power consumption increase
Solution Approach 1:
The system performs partial action by evaluating only the preamble signal to determine electrode selection, rather than continuously analyzing all incoming data. This limited assessment consumes less power while still providing sufficient information to make optimal reception decisions, avoiding excessive processing.
Solution Approach 2:
The electrode selection decision is made in advance during the preamble reception phase, before the main image data transmission begins. This preliminary determination eliminates the need for continuous power-intensive signal processing during the actual imaging phase, reducing overall power consumption while maintaining reliability.
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
The device effectively selects the best electrode pair for receiving image data, ensuring reliable and stable image transmission despite the capsule endoscope's movement, by determining validity and correlation values for each electrode pair combination.
Implementation Method 1
A capsule endoscope system in a human body communication scheme uses a human body as a material and thus does not require a separate signal transfer medium
Implementation Method 2
an analog front end configured to receive a preamble from one receiving electrode pair from among a plurality of receiving electrodes
Implementation Method 3
a valid signal detection circuit configured to compare a reference voltage with input data generated on a basis of a voltage level of the preamble
Data Source
AI summary
Provided are a capsule endoscopic receiving device, a capsule endoscope system including the same, and an operating method of the capsule endoscopic receiving device, the capsule endoscopic receiving device including an analog front end configured to receive a preamble from one receiving electrode pair from among a plurality of receiving electrodes, a valid signal detection circuit configured to compare a reference voltage with input data generated on a basis of a voltage level of the preamble, and a preamble processor configured to select a final electrode pair configured to receive the image data on a basis of a correlation value of the preamble and a comparison result of the input data and the reference voltage. According to the inventive concept, stability of receiving image data may be secured by selecting an optimal receiving electrode pair.