Radial Artery Tracking via Sequential Light Emission
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Solution Overview
Problem
Current biometric information detection methods for pulse waves, particularly noninvasive methods, face challenges in accurately measuring biometric parameters like vessel elasticity, blood flow rate, and blood pressure due to measurement errors and external factors such as skin thickness, especially when detecting radial artery signals.
Innovation Solution
A biometric signal measurer apparatus and method using a processor-driven arrangement of light-emitting and light-receiving elements to determine a tracking line on the radial artery, analyzing pulse wave signals for time delay and calculating pulse transit time to derive biometric information, including vessel elasticity, blood flow rate, and blood pressure, with a user interface and communicator for output and transmission of results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If noninvasive pulse wave detection methods are used, then pain and invasiveness are eliminated, but measurement accuracy and reliability deteriorate due to external factors such as skin thickness
Solution Approach 1:
The detection system is divided into multiple light-emitting elements and light-receiving elements arranged in specific patterns. By segmenting the measurement into multiple channels and positions, the system can selectively detect signals from different depths and locations, thereby improving measurement accuracy while maintaining noninvasive operation.
Solution Approach 2:
The patent employs light-emitting and light-receiving elements with specific spatial arrangements and configurations tailored to detect pulse waves at different tissue depths. By optimizing the local detection quality through selective element placement and sequential activation, the system overcomes the limitations of skin thickness variations while preserving the noninvasive nature of the measurement.
2Measurement precision
If multiple light-emitting elements are used to track radial artery positions, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The system sequentially activates light-emitting elements in a periodic manner rather than simultaneously, allowing the same light-receiving element to detect signals from multiple positions over time. This temporal multiplexing approach achieves radial artery tracking accuracy equivalent to having multiple simultaneous detection channels while reducing the total number of components required.
Solution Approach 2:
The light-receiving element serves multiple functions by detecting signals from different light-emitting elements at different time points, effectively tracking the radial artery position across multiple locations. This multi-functional approach allows a single receiver to perform the work of multiple receivers, thereby reducing device complexity while maintaining measurement 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
The solution provides accurate and reliable detection of biometric information by minimizing measurement errors and external factor influences, enabling precise analysis of radial artery signals and subsequent biometric parameters, facilitating wearable device implementation.
Implementation Method 1
a light-receiving element and a plurality of light-emitting elements; sequentially driving the plurality of light-emitting elements, receiving a signal detected by the light-receiving element
Implementation Method 2
The analyzing unit may be further configured to measure a time delay between the at least two points and calculate a pulse transit time (PTT) from the time delay
Data Source
AI summary
Provided is an apparatus and method for detecting biometric information. The apparatus may include a biometric signal measurer comprising a light-receiving element and a plurality of light-emitting elements; and a processor including a tracking unit configured to sequentially drive the plurality of light-emitting elements, receive a signal detected by the light-receiving element, and determine a tracking line that connects at least two positions of a radial artery of the object from the received signal; and an analyzing unit configured to detect a pulse wave signal at the at least two points on the tracking line and analyze biometric information from the detected pulse wave signal.