Signal Source Position Detection Using Voltage Ratios
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Solution Overview
Problem
Existing methods for detecting the position of a signal source in a living body require a large number of electrodes, imposing a significant burden on the body and resulting in low-resolution electric potential distributions.
Innovation Solution
A method using a small number of electrodes, where external resistances are alternately connected in parallel between the electrodes and a ground potential, measuring voltages and calculating ratios to determine the position of the signal source, allowing for high-accuracy detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large number of electrodes are arranged on the living body, then the resolution of electric potential distribution is improved, but the burden on the living body increases
Solution Approach 1:
The invention changes the measurement parameters by introducing external resistances and measuring voltage ratios instead of direct potentials. By measuring the ratio of voltages with different external resistances connected, the system can determine the position of signal sources using only a small number of electrodes (3 or more), thereby achieving high-resolution localization without requiring a large number of electrodes that would burden the living body
Solution Approach 2:
The invention introduces external resistances as intermediary elements connected between the electrodes and ground. These external resistances serve as mediators that enable the measurement of voltage ratios, which in turn provide information about the position of signal sources. This intermediary approach allows accurate position detection with fewer electrodes, reducing the burden on the living body while maintaining measurement precision
2Object-affected harmful factors
If a small number of electrodes are used, then the burden on the living body is reduced, but the resolution of electric potential distribution decreases
Solution Approach 1:
The invention transforms the measurement approach by changing from direct potential measurement to voltage ratio measurement with switched external resistances. This parameter change enables the system to extract positional information from a small number of electrodes, achieving high-resolution signal source localization without requiring numerous electrodes that would increase the burden on the living body
Solution Approach 2:
The invention employs dynamic switching of external resistances connected between the electrodes and ground. By alternately connecting different external resistances and measuring the resulting voltage ratios, the system dynamically gathers information that enables accurate position determination. This dynamic measurement approach allows high-resolution detection with minimal electrodes, reducing burden while maintaining precision
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
Enables accurate detection of the signal source position with a reduced number of electrodes, improving resolution and reducing the burden on the living body while allowing for real-time tracking of signal source movement.
Implementation Method 1
measuring voltages including first voltages Vi (i=1, 2, 3) which are generated at the respective electrodes when the first external resistance is connected in parallel
Data Source
AI summary
A method for detecting a position of a signal source in a living body includes: arranging three electrodes on a surface of the living body and alternately connecting a first external resistance and a second external resistance in parallel between the electrodes and a ground potential; measuring first voltages Vi (i=1, 2, 3) generated at the respective electrodes when the first external resistance is connected in parallel between the electrodes and the ground potential, and second voltages Vi (i=1, 2, 3) generated at the respective electrodes when the second external resistance is connected in parallel between the electrodes and the ground potential; and calculating three ratios Vi/V′i (i=1, 2, 3) from the first and second voltages Vi and V′i, and detecting the position of the signal source in the living body based on the three ratios Vi/V′i (i=1, 2, 3).