研究目的
To distinguish the conversation from the mastication using a Doppler sensor and a signal processing scheme CARS, aiming to use the time lengths of these actions as indexes of well-being in the field of elderly care.
研究成果
The application of CARS to the processing of Doppler sensor output reveals the difference in jaw movement between conversation and mastication, verifying the possibility of measuring the time lengths of these actions under the assumption that mastication is more periodic than conversation.
研究不足
The study assumes that mastication causes more periodic jaw movement than conversation, which may not always be the case in real-world scenarios. The experiment is conducted under controlled conditions with intentional synchronization of mastication to a specific period.
1：Experimental Design and Method Selection:
The study uses a Doppler sensor for non-contact sensing of jaw movement caused by conversation and mastication, applying the CARS signal processing scheme to distinguish between these actions.
2：Sample Selection and Data Sources:
The experiment involves a test subject performing conversation and mastication, with the Doppler sensor output sampled at 100Hz, 12bits by a data logger.
3：List of Experimental Equipment and Materials:
A Doppler sensor module and a data logger are used.
4：Experimental Procedures and Operational Workflow:
The Doppler sensor is placed beneath the jaw, and the experiment is conducted for 180 seconds, with the first 90 seconds for conversation and the following 90 seconds for mastication.
5：Data Analysis Methods:
The CARS scheme is applied to analyze the sampled data to distinguish between conversation and mastication based on the periodicity of jaw movement.
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