Antenna Connection Unit for Capsule Endoscope Positioning
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Solution Overview
Problem
Existing capsule endoscope systems face challenges in accurately detecting the position of the capsule endoscope within the body due to fluctuations in received signal strength across multiple receiving antennas, leading to inconsistent image data transmission and positioning errors.
Innovation Solution
An antenna connection unit with a received electric field strength detector, correction parameter generation unit, and storage unit that generates and stores correction parameters based on reference power measurements, allowing for precise correction of signal strength fluctuations and improved position estimation of the capsule endoscope.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple receiving antennas are arranged outside the subject to detect position of capsule endoscope, then position detection capability is improved, but received signal strength fluctuates causing measurement precision deterioration
Solution Approach 1:
The patent changes the parameter of received signal strength by introducing correction parameters that adjust for fluctuations in signal strength across multiple receiving antennas. The correction parameter generation unit generates correction values based on reference measurements, and these correction parameters are applied to normalize the signal strength readings from different antennas, ensuring consistent position detection precision regardless of which antenna receives the strongest signal.
2Measurement precision
If received signal strength is used directly for position estimation, then position detection is simplified, but position estimation accuracy deteriorates due to signal fluctuations
Solution Approach 1:
The patent applies preliminary action by pre-generating correction parameters based on reference signal strength measurements taken before actual position detection. The correction parameter generation unit creates a correction lookup table or correction values in advance, which are then applied during position estimation to compensate for antenna-specific signal fluctuations. This approach maintains position estimation accuracy while keeping the real-time processing relatively simple.
3Reliability
If correction parameters are generated for each antenna to compensate signal fluctuations, then received signal strength stability is improved, but device complexity increases due to additional correction mechanisms
Solution Approach 1:
The system implements self-service by having the correction parameter generation unit automatically generate and store correction parameters based on reference measurements from each receiving antenna. The antenna connection unit self-calibrates by comparing reference signal strengths and computing correction values without requiring manual intervention. This automated approach improves signal strength consistency while minimizing the operational complexity of the correction system.
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 enhances the accuracy of capsule endoscope positioning and image data transmission by stabilizing signal strength across antennas, ensuring reliable and consistent data reception and analysis.
Implementation Method 1
a received electric field strength detector configured to detect received strength of the wireless signal according to a plurality of pieces of input power from the plurality of receiving antennas
Implementation Method 2
a correction parameter generation unit configured to generate a received strength correction parameter for correcting the received electric field strength detector, based on the plurality of pieces of input power and the received strength corresponding to each input power
Data Source
AI summary
An antenna connection unit is a unit to which receiving antennas for receiving a wireless signal transmitted from a capsule endoscope introduced into a subject, is connectable. The antenna connection unit includes a received electric field strength detector configured to detect received strength of the wireless signal according to a plurality of pieces of input power from the receiving antennas, a correction parameter generation unit configured to generate a received strength correction parameter for correcting the received electric field strength detector, which is obtained by correcting the plurality of pieces of input power and the received strength corresponding to each input power, based on a reference parameter indicating a relationship between each input power and a detection strength obtained by performing a measurement for a received electric field strength detection circuit as a reference in advance, and a storage unit for storing the received strength correction parameter.