Multi-Radar Vital Sign Detection Under Vehicle Vibration
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Solution Overview
Problem
Existing radar sensors face challenges in accurately detecting biological vibrations in environments with significant vibrations, such as vehicles, due to interference from non-biological vibrations, making it difficult to separate and remove these signals effectively.
Innovation Solution
A detection device employing multiple radar sensors positioned to detect vibrations in different ranges of the body, combined with a vibration sensor, processes signals to isolate and remove non-biological vibrations, enhancing accuracy by comparing and subtracting signal frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single radar sensor is used to detect biological vibrations, then the detection coverage is sufficient, but the accuracy is degraded by non-biological vibrations in the environment
Solution Approach 1:
The patent divides the detection task into multiple radar sensors, each responsible for detecting vibrations in specific body ranges (e.g., chest, abdomen). By segmenting the detection coverage and combining signals from multiple sensors, the system can isolate biological vibrations from non-biological environmental vibrations, thereby improving measurement precision while addressing the harmful interference.
2Measurement precision
If multiple radar sensors are deployed to improve detection accuracy, then the ability to separate biological vibrations improves, but the device complexity increases
Solution Approach 1:
The patent merges the detection capabilities of multiple radar sensors into a unified detection system. By combining the output signals from multiple radar sensors that detect vibrations in different body ranges, the system achieves improved measurement precision without proportionally increasing device complexity, as the sensors work together in a coordinated manner to filter and identify biological vibrations.
3Adaptability or versatility
If radar sensors are used in vibrating environments like vehicles, then the versatility of the detection system is improved, but the reliability of biological signal detection deteriorates due to environmental vibrations
Solution Approach 1:
The patent applies local quality by having different radar sensors target specific local regions of the body (e.g., chest for heartbeat, abdomen for respiration). Each sensor is optimized for detecting vibrations in its designated body range, allowing the system to maintain reliability in diverse environments like vehicles by focusing on localized biological signals rather than attempting to detect all vibrations globally.
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
The system effectively removes non-biological vibrations, improving the accuracy of detecting biological signals like heartbeat and respiration by filtering and comparing signal frequencies, allowing for precise calculation of biological information even in vibrating environments.
Implementation Method 1
a radar sensor which transmits an electromagnetic wave to a range including a first range of the body and receives a reflected signal
Implementation Method 2
a vibration sensor which detects a vibration in the body and outputs a signal
Implementation Method 3
the processing unit is configured to calculate information on the living body based on the first signal and the second signal by removing a frequency other than a frequency range of a biological vibration
Data Source
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AI summary
A detection device includes a first sensor configured to transmit a first electromagnetic wave to a first range and receive the first electromagnetic wave reflected in the first range, a second sensor configured to transmit a second electromagnetic wave to a second range different from the first range and receive the second electromagnetic wave reflected in the second range, and a processing unit configured to calculate information on an object reflecting the first electromagnetic wave and the second electromagnetic wave based on a first signal output from the first sensor and a second signal output from the second sensor.