Single-Mode Radar for Smart Home Activity and Vital Sign Monitoring
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Solution Overview
Problem
Existing devices struggle to balance the competing demands of contactless health monitoring and human interaction detection using radar, as continuous mode is optimal for health monitoring but burst mode is necessary for effective human interaction detection, leading to inefficiencies and increased user RF exposure.
Innovation Solution
A radar sensor operates in burst mode to optimize human interaction monitoring while creating a virtual continuous mode radar data stream through processing, allowing simultaneous and independent monitoring of both without changing modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radar sensor operates in continuous mode, then health monitoring quality is improved, but human interaction detection capability deteriorates
Solution Approach 1:
The processing system segments the continuous radar data stream into distinct analysis paths: one for health monitoring parameters and another for human interaction detection. This allows the same continuous radar data to be processed independently for both functions, resolving the contradiction between health monitoring quality and human interaction detection capability.
Solution Approach 2:
The radar system is designed to perform multiple functions simultaneously using a single continuous radar stream. The processing system extracts both health metrics (respiratory rate, heart rate) and interaction gestures from the same continuous data, making the system universal and eliminating the need to switch between continuous and burst modes.
2Adaptability or versatility
If the radar sensor operates in burst mode, then human interaction detection capability is improved, but health monitoring quality deteriorates
Solution Approach 1:
The processing system segments the burst radar data into separate analysis channels, applying different processing algorithms to extract health metrics and interaction gestures. This segmentation enables both functions to operate effectively from the same burst mode data stream.
Solution Approach 2:
The system achieves multi-functionality by designing a processing pipeline that simultaneously derives health monitoring data and interaction detection data from burst mode radar signals, eliminating the trade-off between interaction detection capability and health monitoring quality.
3Measurement precision
If the radar sensor switches between continuous and burst modes, then both health monitoring and human interaction detection are optimized, but device complexity increases
Solution Approach 1:
The radar system is designed to perform both health monitoring and human interaction detection using a single continuous operation mode. The processing system handles multiple functions simultaneously, eliminating the need for mode switching hardware and control logic, thus reducing device complexity while maintaining optimization for both functions.
4Measurement precision
If the radar sensor operates in continuous mode, then health monitoring data quality is improved, but user RF exposure increases
Solution Approach 1:
The system uses burst mode radar transmissions, which provide partial continuous coverage rather than full continuous operation. This partial action approach maintains sufficient data quality for health monitoring while significantly reducing the total RF energy exposure to users compared to true continuous operation.
Solution Approach 2:
The system changes the operational parameters of the radar from continuous high-duty-cycle operation to burst mode operation with controlled duty cycle. This parameter change reduces RF exposure while the processing system compensates to maintain adequate health monitoring data quality through sophisticated signal processing of the burst data.
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 enables effective contactless health monitoring and human interaction detection using a single device, providing higher-quality data and reducing user RF exposure by maintaining burst mode operation while creating a virtual continuous mode radar data stream.
Implementation Method 1
a radar sensor, housed by the housing, configured to operate in a burst mode in which the radar sensor emits a plurality of bursts of radar chirps
Data Source
AI summary
Various arrangements for monitoring for contactless human interactions and health using a single radar transmission modulation mode are provided. Radar chirps may be output by a radar sensor operating in a burst mode. The burst mode radar data stream may be monitored for a contactless human interaction performed by an active user. The burst mode radar data stream may be converted to a virtual continuous mode radar data stream. Health monitoring of an inactive user may be performed using the virtual continuous mode radar data stream.