Physical Condition Monitoring for Sudden Heart Rate and Blood Pressure Shifts
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Solution Overview
Problem
Existing devices fail to detect sudden changes in physical condition, such as those occurring during driving or exercise, which can lead to adverse events like fainting or unconsciousness, as they primarily focus on detecting changes in biological states like fatigue but not immediate physiological shifts.
Innovation Solution
A physical condition determination device that analyzes biosignals from the back of a person to detect sudden changes in heart rate and blood pressure, using frequency-gradient time-series waveforms and distribution ratios to identify specific patterns indicative of a sudden change in physical condition, and determines if these changes occur within a predetermined time range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing devices focus on detecting changes in biological states like fatigue using frequency analysis of biosignals, then they can determine the state of the person (relaxed, fatigued, sympathetic dominant, etc.), but they fail to detect sudden changes in physical condition such as those occurring during driving or exercise that lead to fainting or unconsciousness
Solution Approach 1:
The patent applies dynamics by making the detection system adaptive to different types of physical condition changes. The determination unit dynamically adjusts detection thresholds and parameters based on whether gradual fatigue or sudden physical condition changes are being monitored, enabling the same device to handle both static and dynamic detection scenarios effectively
Solution Approach 2:
The patent changes detection parameters to identify sudden physical condition changes. By monitoring temporal patterns, gradient changes, and synchronization between heart rate and blood pressure variations, the system transitions from detecting steady-state fatigue to detecting acute physical condition changes that occur suddenly during driving or exercise
2Measurement precision
If the device uses frequency analysis of biosignals to determine person's state, then it can identify fatigue progression, but it cannot detect immediate physiological shifts in heart rate and blood pressure that occur simultaneously during sudden physical condition changes
Solution Approach 1:
The patent ensures continuous monitoring of both frequency-domain features (for fatigue detection) and time-domain features (for sudden change detection). The determination unit continuously analyzes temporal patterns and gradient changes without interruption, enabling simultaneous detection of both gradual fatigue progression and sudden physical condition changes
Solution Approach 2:
The system uses feedback by comparing determined physical condition states against expected patterns. When the determination unit detects anomalies in the temporal relationship between heart rate and blood pressure changes, it triggers alerts or adjustments, providing feedback that enables real-time response to sudden physical condition changes
3Productivity
If the device analyzes only heart rate variations from biosignals, then it can assess autonomic nervous control, but it cannot confirm sudden physical condition changes without considering simultaneous blood pressure variations
Solution Approach 1:
The patent merges heart rate analysis and blood pressure analysis into a unified determination framework. The determination unit simultaneously processes both parameters and evaluates their temporal synchronization, combining the efficiency of single-parameter analysis with the accuracy of multi-parameter assessment to confirm sudden physical condition changes
Data Source
AI summary
The occurrence of a sudden change in physical condition is detected. In a physical condition determination device 100, a heart rate-relate index calculation unit 110 specifies an appearance time of a sign of a sudden change in heart rate, from a time-series waveform of an index corresponding to a variation in the heart rate (heart rate-related index) and a blood pressure-related index calculation unit 120 specifies an appearance time of a sign of a sudden change in blood pressure, from a time-series waveform of an index corresponding to a variation in the blood pressure (blood pressure-related index). A physical condition sudden change determination unit 130 determines that a sudden change in physical condition (physical condition sudden change) has occurred in a case where these appearance times are both within a predetermined time. This enables the determination in which the sudden change in the heart rate and the sudden change in the blood pressure are taken into consideration, to enable the detection of the physical condition sudden change.