Capsule Endoscope Coil Orthogonal Placement
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Solution Overview
Problem
Capsule endoscopes face interference between transmission and reception coils, which deteriorates transmission and reception efficiency, especially in devices with limited space, making it challenging to maintain effective radio signal transmission and reception while minimizing mutual interference.
Innovation Solution
The capsule endoscope design incorporates a cylindrical housing with a transmission coil and a reception coil disposed on opposite ends, ensuring their principal planes are orthogonal to the center axis, minimizing interference and optimizing coil placement to maintain efficient transmission and reception, with the transmission coil also serving as a heat radiation element and the reception coil capable of rectifying an alternating magnetic field for power generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If transmission and reception coils are disposed close to each other in a capsule-type housing, then the device size is reduced, but mutual interference between coils increases and transmission/reception efficiency deteriorates
Solution Approach 1:
The patent applies dimensional separation by disposing the transmission coil and reception coil in different spatial dimensions - specifically, the transmission coil is disposed on the end cover side while the reception coil is disposed on the main body side, with their principal planes positioned at different locations along the longitudinal axis of the capsule. This spatial separation in the longitudinal dimension reduces magnetic field interference while maintaining a compact overall device size.
Solution Approach 2:
The patent employs asymmetric arrangement of the coils along the longitudinal axis of the capsule housing. Rather than symmetric placement, the transmission coil and reception coil are positioned at asymmetric locations - one on the end cover side and the other on the main body side - which optimizes the magnetic field distribution and minimizes mutual interference while maintaining compact dimensions.
2Reliability
If transmission coil and reception coil are placed on opposite ends of the housing, then mutual interference is minimized, but the device length increases
Solution Approach 1:
The patent utilizes the longitudinal dimension of the capsule housing to separate the coils, placing them at different positions along the axis rather than side-by-side. This dimensional arrangement achieves adequate separation for reduced interference while constraining the overall device length within acceptable limits for capsule endoscopy applications.
Solution Approach 2:
The patent applies local quality by optimizing the specific placement positions of the coils along the longitudinal axis - the transmission coil on the end cover side and the reception coil on the main body side - creating localized optimal conditions for each coil's function while maintaining overall device compactness.
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 enhances the efficiency of both transmission and reception, reduces mutual interference, and allows for extended in vivo observation without battery limitations, as the device can harness external power, maintaining stable operation and improving reliability.
Implementation Method 1
a reception coil formed by a reception coil wire for receiving the external signal
Implementation Method 2
a transmission coil formed by a transmission coil wire for transmitting the information signal
Implementation Method 3
the reception coil capable of rectifying an alternating magnetic field for power generation
Data Source
AI summary
In a capsule endoscope, on an inside of a capsule type housing including a cylindrical main body section and two semispherical end cover sections and having a rotationally symmetrical shape with respect to a center axis of the housing, an image pickup board section, a transmission board section, and a reception board section are housed such that principal planes of the image pickup board section, the transmission board section, and the reception board section are orthogonal to the center axis. A coil wire of at least one of a transmission coil formed by a transmission coil wire and a reception coil formed by a reception coil wire, respective principal planes of which are orthogonal to the center axis, is disposed on the end cover section side of the housing.