Biometric Device Remote Calibration Pulse Wave Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing biometric information measuring devices face challenges in accurately analyzing pulse waves for blood pressure without invasive methods, as non-invasive methods rely heavily on calibration information that may not account for individual variations, leading to measurement errors.
Innovation Solution
A biometric information measuring device and system that includes a pulse wave measuring module, a communication module to obtain calibration information from a remote server, and a biometric information analyzing module to analyze pulse waves, featuring a blood pressure calculator using a blood pressure estimating equation, which updates a local database with parameters from direct blood pressure measurements to improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If non-invasive pulse wave measurement methods are used, then ease of operation is improved, but measurement precision deteriorates due to lack of individual calibration
Solution Approach 1:
The system performs preliminary calibration by measuring pulse waves and reference blood pressures to generate individualized calibration information before actual biometric measurement. This preliminary action stores subject-specific parameters in a database, enabling accurate non-invasive measurements without requiring invasive procedures during routine use.
Solution Approach 2:
The system uses feedback from reference blood pressure measurements to continuously update and refine the blood pressure estimating equation. By comparing estimated blood pressure with reference measurements and adjusting calibration parameters accordingly, the system improves measurement precision while maintaining non-invasive operation.
2Measurement precision
If individualized calibration information is obtained through direct blood pressure measurement, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system introduces a calibration server as an intermediary that handles complex data processing, database management, and blood pressure estimating equation calculation. This externalizes computational complexity from the wearable device, allowing the device to remain simple while achieving high measurement precision through server-side calibration processing.
Solution Approach 2:
The system changes parameters by generating individualized calibration information including subject-specific pulse wave characteristics and blood pressure relationships. These parameter changes enable precise blood pressure estimation from pulse waves without requiring complex device hardware, as the precision is achieved through customized parameter sets stored in the database.
3Reliability
If calibration information is stored locally in the device, then reliability is improved, but loss of information increases due to lack of updates
Solution Approach 1:
The system maintains continuous calibration by periodically updating the local database with new pulse wave and blood pressure measurements. This continuous action ensures calibration information remains current and accurate over time, preventing information loss while maintaining reliability through ongoing refinement of the blood pressure estimating equation.
Solution Approach 2:
The calibration server acts as an intermediary that receives updated calibration data from multiple sources, processes it centrally, and distributes updated calibration information to devices. This intermediary approach ensures devices receive the latest calibration data without requiring complex peer-to-peer synchronization, maintaining reliability while preventing information loss through centralized updates.
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 system provides highly accurate biometric information analysis by continuously updating calibration information based on direct blood pressure measurements, reducing measurement errors and improving the reliability of non-invasive blood pressure monitoring.
Implementation Method 1
a pulse wave measuring module configured to measure pulse waves by emitting a light to a target object and sensing a light from the target object
Data Source
AI summary
A biometric information measuring device includes a pulse wave measuring module configured to measure pulse waves by emitting light toward a target object and sensing light reflected from the target object; a communication module configured to obtain calibration information from a remote calibration server; and a biometric information analyzing module configured to analyze biometric information based on the measured pulse waves and the calibration information. The calibration information indicates biometric information measurement variables of a plurality of subjects.