Biological Measurement Apparatus Positioning via Waveform Analysis
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Solution Overview
Problem
Conventional biological information measurement apparatuses lack an index for determining the appropriate wearing position of the device relative to the measurement site, such as a wrist or upper arm, which can lead to inaccurate measurements due to improper alignment.
Innovation Solution
A biological information measurement apparatus that includes a transmitter, receiver, feature extraction unit, and determination unit to analyze the waveform signals reflected from the measurement site, providing an index for adjusting the device's position based on extracted features like amplitude or waveform shape, allowing for proper alignment without additional alignment devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a transmission/reception antenna pair is disposed on a wrist-worn strap to measure pulse wave signal, then biological information can be measured, but it becomes difficult to determine whether the wearing position is appropriate
Solution Approach 1:
The patent implements feedback by analyzing the waveform signal characteristics (amplitude, shape, frequency) reflected from the measurement site and providing this information as a guide to the user. The control unit processes the waveform features and outputs feedback indicating whether the wearing position is appropriate, enabling the user to adjust the device position based on quantitative signal characteristics rather than guessing.
Solution Approach 2:
The patent introduces an intermediary processing system between the antenna pair and the user. The control unit acts as an intermediary that receives raw waveform signals, extracts meaningful features (amplitude, shape, frequency), and transforms this complex data into simple, actionable feedback for the user about wearing position appropriateness.
2Measurement precision
If alignment devices are added to determine proper wearing position, then position determination accuracy improves, but device complexity and cost increase
Solution Approach 1:
The patent makes the waveform analysis function serve multiple purposes: it not only measures biological information (pulse wave) but also simultaneously determines wearing position appropriateness. The same transmission/reception antenna pair and control unit used for biological measurement are reused for position determination, eliminating the need for separate alignment devices.
Solution Approach 2:
The device performs self-diagnosis by automatically analyzing its own waveform signals to determine if it is properly positioned. The control unit extracts features from the reflected waves and autonomously evaluates whether the wearing position is appropriate, providing self-service functionality without requiring external alignment tools.
3Ease of operation
If waveform feature analysis is performed to determine wearing position, then position determination becomes possible, but processing complexity increases
Solution Approach 1:
The patent extracts only the essential features from the complex waveform signal that are relevant to position determination. The control unit identifies and extracts specific characteristics (amplitude, shape, frequency) from the reflected wave patterns, separating the critical position-indicative features from the rest of the signal 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
Enables accurate and efficient alignment of the measurement apparatus by providing a simple and cost-effective method to determine the optimal position, improving measurement reliability and user convenience.
Implementation Method 1
a transmitter and a receiver disposed at a position facing a measurement site (target object), transmit radio waves (measurement signals) to the measurement site, and receive reflected waves (reflected signals) of the transmitted radio waves
Data Source
AI summary
In an apparatus for measuring biological information using a radio wave, a technique for acquiring an index related to a setting position of the apparatus with respect to a measurement site is provided. A biological information measurement apparatus (1) according to an aspect of the present disclosure includes a transmitter (3) configured to transmit a radio wave toward a measurement site of a living body; a receiver (4) configured to receive a reflected wave of the radio wave reflected by the measurement site and output a waveform signal of the reflected wave; a feature extraction unit (121) configured to extract information indicative of a feature of a waveform from the waveform signal; a determination unit (122) configured to determine whether a setting position of the biological information measurement apparatus with respect to the measurement site satisfies a condition corresponding to a preset reference position based on the extracted information indicative of the feature of the waveform; and an output unit (5) configured to output information indicative of a determination result determined by the determination unit.