Optical Heart Rate Monitoring via Skin Reflection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional heart rate monitors are cumbersome, often requiring chest straps and electrocardiography equipment, which cause discomfort and limit continuous wear, and lack interactive online communities for data sharing among users.
Innovation Solution
A lightweight wearable system that uses light emitters and detectors to continuously monitor heart rate without a chest strap, along with a modular design and computer-executable instructions for data analysis, providing intensity and recovery scores, and an online platform for data sharing and competition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional chest strap or ECG equipment is used for heart rate monitoring, then measurement precision is improved, but device complexity and discomfort increase, limiting continuous wear
Solution Approach 1:
The patent replaces mechanical contact-based sensors (chest straps, ECG electrodes) with optical sensing technology. Light emitters and photodetectors measure heart rate through optical plethysmography, eliminating the need for physical contact with the chest or skin adhesives, thereby reducing device complexity while maintaining measurement accuracy
Solution Approach 2:
The patent introduces light as an intermediary medium to measure physiological parameters. Instead of direct mechanical contact, light passes through or reflects off the skin to detect blood volume changes, serving as a non-invasive intermediary that enables continuous monitoring without bulky equipment
2Measurement precision
If conventional heart rate monitors are used, then heart rate can be measured, but continuous sensing is prevented due to discomfort and obtrusiveness
Solution Approach 1:
By replacing mechanical contact sensors with optical sensors that can be integrated into wearable devices like smartwatches or fitness trackers, the system enables continuous wear without the discomfort of chest straps. The optical sensing allows for unobtrusive monitoring during daily activities and sleep
Solution Approach 2:
The patent integrates heart rate monitoring with multiple other fitness tracking functions (step counting, sleep analysis, workout tracking) into a single wearable device. This multi-functionality justifies the continuous wear by providing comprehensive health insights beyond just heart rate measurement
3Ease of operation
If lightweight wearable system with optical sensors is used, then continuous and comfortable monitoring is enabled, but device complexity is reduced
Solution Approach 1:
The patent divides the monitoring system into separate functional modules: optical sensing module, signal processing module, and data analysis module. This segmentation allows for a lightweight physical design while distributing computational complexity across different components, enabling continuous wear without overwhelming the user with system complexity
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
Enables continuous, comfortable monitoring of heart rate and other physiological parameters, with automatic data analysis and sharing, enhancing user engagement and fitness management through interactive online communities.
Implementation Method 1
one or more light emitters for emitting light toward the user's skin, one or more light detectors for receiving light reflected from the user's skin
Data Source
AI summary
Embodiments provide physiological measurement systems, devices, and methods for continuous health and fitness monitoring. A wearable strap may detect reflected light from a user's skin, where data corresponding to the reflected light is used to automatically and continually determine physiological attributes of the user. In particular, the wearable strap may be used to monitor heart rate data including a resting heart rate, a heart rate variability, and sleep quality—e.g., to generate a recovery indicator that provides a quantitative assessment of a physical recovery state of the user indicating whether the user is recovered and ready for exercise.