Meal estimation method, meal estimation apparatus, and recording medium

This invention uses your heart rate to figure out when you've eaten. It works by analyzing patterns in your heart rate data, specifically looking for a distinct 'second peak' that appears after the initial rise in heart rate following a meal. By measuring characteristics of this second peak, such as its size or how quickly your heart rate changes around it, the system can determine if you've recently eaten and estimate the meal time.

Why it matters: The widespread adoption of smartwatches and fitness trackers since 2017 means continuous, high-resolution heart rate data is now readily available, simplifying the data acquisition step for this method. This makes it easier to gather the necessary input for real-time meal detection.

Status: ExpiredProtection ended and was never renewed
How hard to build: SpecializedSoftware logic, physiological signal processing

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