Biological Signal Measurement Position Tracking Using Reference Marks
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Solution Overview
Problem
Biological signal measurement reliability decreases due to changes in the measuring position caused by movement of a living organism when using wearable medical devices, leading to inaccurate data collection.
Innovation Solution
A biological signal measuring apparatus and method that utilize reference point sensors to detect signals from reference marks on a subject's surface, a detector to determine the similarity of these signals with stored reference signals, and a sensor to measure biological signals only when the similarity is within an allowable range, ensuring consistent measurement position and data reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wearable medical device is used to measure biological signals, then the device can be carried by individuals and used at home, but the measuring position changes due to movement of the living organism, decreasing the reliability of measured biological signal data
Solution Approach 1:
The patent uses reference point sensors to continuously detect the position of reference marks on the subject's skin. The detected position information is fed back to adjust the measuring position of the biological signal sensor, ensuring it remains at the correct location despite body movement. This closed-loop feedback mechanism maintains measurement reliability while preserving wearable portability.
Solution Approach 2:
The patent introduces reference marks and reference point sensors as intermediary elements between the wearable device and the biological signal measurement. These intermediaries serve as position markers that enable the system to track and compensate for movement, bridging the gap between portable design and reliable measurement.
2Measurement precision
If the measuring position is fixed to ensure accurate biological signal measurement, then measurement precision is improved, but the device becomes less adaptable to body movement and reduces ease of operation
Solution Approach 1:
The patent transitions from a static measuring position to a dynamic adjustment mechanism. The reference point sensors continuously track the position of reference marks, and the biological signal sensor's measuring position is dynamically adjusted based on detected position changes. This dynamic system maintains measurement precision while adapting to body movement.
Solution Approach 2:
The system implements real-time feedback by detecting reference mark positions and using this information to adjust the measuring position. This feedback loop enables the device to maintain precise measurements while adapting to movement, resolving the contradiction between fixed precision and dynamic adaptability.
3Reliability
If reference point sensors and position detection mechanisms are added to maintain measuring position, then measurement reliability is improved, but device complexity increases
Solution Approach 1:
The patent uses optical copying principles where reference point sensors detect light reflected from reference marks to determine position. This optical copying approach provides accurate position information without requiring complex mechanical or electronic tracking mechanisms, improving reliability while limiting complexity increase.
Solution Approach 2:
The reference marks serve as simple intermediary elements that provide position information without adding significant complexity. These passive markers work with the reference point sensors to enable position tracking and measurement reliability improvement with minimal added system complexity.
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 solution maintains a consistent biological signal measuring position, enhancing the reliability of measured data by ensuring that signals are only recorded when the position is accurately aligned, thereby improving the accuracy and validity of the biological signal measurements.
Implementation Method 1
a light source to radiate a light onto the surface of the subject on which the reference marks are attached and a spectrum analyzer to analyze a spectrum of the light reflected from the surface of the subject
Implementation Method 2
a light source to radiate a light onto the biological signal measuring position and a spectrum analyzer to analyze a spectrum of the light reflected from the biological signal measuring position
Implementation Method 3
an impedance measurer to measure an impedance between the at least two electrodes
Data Source
AI summary
Provided are apparatuses for and methods of measuring a biological signal. The biological signal measuring apparatus includes reference point sensors configured to detect signals detected from at least two reference marks on a surface of a subject and a biological signal measuring position detector configured to generate information about a biological signal measuring position based on the signals detected from the at least two reference marks. The biological signal measuring apparatus measures the biological signal according to the information about the biological signal measuring position.