Radar Sleep Breathing Analysis for Apnea Detection
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Solution Overview
Problem
Conventional methods for analyzing sleep breathing, such as polysomnography, struggle to distinguish between obstructive sleep apnea (OSA) and central sleep apnea (CSA) and require invasive equipment, limiting their effectiveness and accessibility.
Innovation Solution
A radar-based device and method for analyzing sleep breathing patterns that can classify breathing patterns and detect sleep disorders, allowing for contactless monitoring and differentiation between OSA, CSA, and mixed sleep apnea without the need for polysomnography.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If polysomnography is used to measure sleep quality and detect sleep disorders, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the essential measurement function from complex polysomnography equipment by using a simple radar device to detect breathing patterns. The radar extracts respiratory information from reflected signals, eliminating the need for multiple physiological sensors and complex test equipment while maintaining diagnostic capability for sleep apnea detection.
Solution Approach 2:
The patent creates a simplified copy of polysomnography functionality using radar technology. Instead of measuring multiple physiological parameters with invasive sensors, the system captures breathing pattern data through radar signal reflection, producing equivalent diagnostic information with much simpler equipment.
2Measurement precision
If polysomnography equipment is used to distinguish between OSA and CSA, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The radar-based system enables self-service sleep monitoring without requiring professional testers or complex equipment setup. The device automatically detects and analyzes breathing patterns to distinguish between OSA and CSA, making the diagnostic process as convenient as wearing a simple wrist device while maintaining the ability to differentiate apnea types.
3Ease of operation
If conventional wrist actigraphy and PPG devices are used to monitor sleep, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The patent replaces mechanical contact-based sensors (actigraphy accelerometers and PPG optical sensors) with radar electromagnetic wave detection. This substitution maintains the convenience of wearable or contactless operation while dramatically improving the ability to detect breathing disorders, as radar directly measures respiratory motion rather than inferring it from body movement or blood volume changes.
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 precise detection and analysis of sleep-related breathing disorders, including OSA, CSA, and mixed sleep apnea, facilitating continuous monitoring and reducing the inconvenience of traditional testing methods.
Implementation Method 1
transmitting a radar signal towards a subject and receiving the radar signal reflected from the subject by using a radar
Data Source
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AI summary
A device for analyzing sleep breathing using a radar includes a transceiver configured to transmit a radar signal toward a subject and receive the radar signal reflected from the subject; an average breathing signal calculation unit configured to calculate an average breathing signal of the subject based on the radar signal; a sleep breathing pattern information generation unit configured to generate sleep breathing pattern information of the subject by comparing the radar signal with the average breathing signal; and a sleep breathing event detection unit configured to detect a sleep breathing event based on the sleep breathing pattern information.