Biological Information Measuring Instrument Alarm Timing Control
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Solution Overview
Problem
Existing biological information measuring instruments face challenges in achieving high precision measurements due to large body movements during both contactless and contact measurements, making it difficult to acquire accurate biological data in a semi-natural condition.
Innovation Solution
A biological information measuring instrument comprising a biological information acquisition unit, an alarm unit, and a control unit that coordinates the alarm and measurement processes, where the alarm unit calls for attention and the acquisition unit starts measuring within a prescribed time frame relative to the alarm, minimizing body movements and enhancing precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contactless measurement is used, then the living body is not consciously aware of the measurement enabling semi-natural condition measurement, but large body movements occur leading to large measurement errors
Solution Approach 1:
The alarm unit activates before the biological information acquisition unit to call the user's attention in advance. This preliminary action of alerting the user reduces body movements during the subsequent measurement period, thereby improving measurement accuracy while maintaining the contactless semi-natural measurement approach
2Measurement precision
If the alarm unit calls for attention during measurement, then body movements are reduced improving measurement precision, but the living body becomes consciously aware of the measurement
Solution Approach 1:
The alarm unit is controlled to activate before the biological information acquisition unit starts measurement. This timing arrangement allows the alarm to reduce body movements during measurement while the user's awareness is already established, maintaining measurement precision without compromising the semi-natural condition
3Measurement precision
If the acquisition starting time is not synchronized with the alarm, then the measurement may occur during large body movements, but the system complexity increases
Solution Approach 1:
The control unit is configured to set the acquisition starting time based on the alarm starting time, creating a predetermined temporal relationship. This synchronization ensures measurements occur when body movements are minimized while using a simple timing control mechanism rather than complex real-time monitoring
Solution Approach 2:
The system uses periodic alarm activation followed by periodic measurement acquisition, establishing a regular timing pattern. This periodic structure simplifies the control mechanism while ensuring measurements consistently occur during low-body-movement phases
Data Source
AI summary
A biological information measuring instrument performs high precision biological information measurement on a living body. The biological information measuring instrument includes: a measuring unit and an analysis unit that measure a user in a contactless manner to acquire biological information; and a speech unit that produces an alarm for reducing body movements of the user. The measuring unit and the analysis unit start to acquire biological information at an acquisition starting time. A control unit sets the acquisition starting time so as to fall in a prescribed range of time defined using an alarm starting time for the speech unit as a reference.