Heart Rate Sensor Startup Period and Sampling Rate Adjustment
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Solution Overview
Problem
Current intelligent electronic devices face challenges in accurately detecting heart rate conditions due to power consumption issues with photoplethysmography sensors, leading to inefficient sampling rates and intervals that do not adapt to user motion status.
Innovation Solution
A method and apparatus that dynamically adjust the startup period and sampling rate of heart rate sensors based on the user's motion status, using a prestored correspondence to ensure real-time detection, data continuity, and power savings by starting the sensor only when necessary and adjusting rates according to exercise intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the heart rate sensor is kept normally on for real-time detection, then the heart rate can be detected in real time, but the power consumption increases significantly affecting standby time
Solution Approach 1:
The patent applies dynamics by making the sensor startup period and sampling rate adjustable based on motion status. The system dynamically changes detection parameters according to user activity level, transitioning from frequent detection during exercise to infrequent detection during rest, thereby optimizing both real-time performance and power consumption.
Solution Approach 2:
The patent changes physical parameters (startup period and sampling rate) of the heart rate sensor based on detected motion status. When motion is detected, the system switches to a shorter startup period and higher sampling rate for real-time detection. When no motion is detected, it switches to a longer startup period and lower sampling rate to save power.
2Use of energy by moving object
If the sensor uses a fixed constant sampling rate with regular interval detection, then power consumption is reduced, but the heart rate detection accuracy deteriorates
Solution Approach 1:
The system dynamically adjusts the sampling rate based on motion status. During exercise when heart rate changes rapidly, the sampling rate increases to capture accurate heart rate data. During rest when heart rate is stable, the sampling rate decreases to save power while maintaining sufficient accuracy.
Solution Approach 2:
The patent changes the sampling rate parameter according to motion status detection results. The system stores multiple sampling rate values and selects appropriate rates based on whether the user is in motion or at rest, optimizing both measurement precision and energy efficiency.
3Loss of time
If the startup period is shortened to improve real-time detection, then heart rate changes can be detected faster, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the startup period based on motion status. During exercise, the startup period is shortened to enable fast detection of heart rate changes. During rest, the startup period is extended to reduce the frequency of sensor activation and save power.
Solution Approach 2:
The patent changes the startup period parameter according to motion status. The system stores multiple startup period values and selects appropriate periods based on whether the user is exercising or resting, optimizing both response time and power consumption.
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
This approach enhances the precision and real-time performance of heart rate detection while reducing power consumption and prolonging sensor lifespan by adapting detection parameters to the user's activity level.
Implementation Method 1
a photoplethysmography (PPG) sensor is a device that consumes a significant amount of power
Data Source
AI summary
A heart rate detection method and an apparatus, where the method is applied to an electronic device, and the electronic device includes a heart rate sensor. The method includes detecting, by the electronic device, a current motion status of a user carrying the electronic device, determining, based on a prestored correspondence between a motion status, a startup period, and a sampling rate, a startup period and a sampling rate corresponding to the current motion status, where the startup period is a period in which the heart rate sensor is started to detect a heart rate of the user carrying the electronic device, and the sampling rate is a sampling rate of collecting heart rate data by the heart rate sensor, and starting the heart rate sensor at regular intervals based on the startup period to collect heart rate data at the sampling rate.