FMCW Radar Signal Processing for Simultaneous Physiological and Temperature Detection
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Solution Overview
Problem
There is a need for efficient detection equipment to assist in monitoring physiological information and body temperature, particularly in patient care, elderly care, and infant care, due to insufficient nursing manpower.
Innovation Solution
An FMCW (Frequency Modulated Continuous Wave) radar system that includes a chirp signal generator, transmitter module, receiver module, processing module, and computing module, capable of generating and analyzing radar signals to detect both physiological signals and sensor-related information, such as temperature, from objects equipped with sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate detection systems are used for physiological information and body temperature, then detection coverage is comprehensive, but device complexity and manufacturing costs increase
Solution Approach 1:
The radar system is designed to perform multiple detection functions using a single device. The FMCW radar can detect both physiological information (heartbeat, respiration) and body temperature simultaneously by processing different signal components from the same reflected radar signal, eliminating the need for separate detection systems
Solution Approach 2:
The patent combines previously separate detection functions into a unified radar system. By integrating physiological signal detection and temperature measurement capabilities into one FMCW radar device, the system reduces overall device complexity while maintaining comprehensive detection coverage
2Measurement precision
If separate detection systems are used for physiological information and body temperature, then detection coverage is comprehensive, but manufacturing costs increase
Solution Approach 1:
The radar system is designed to perform multiple detection functions using a single device. The FMCW radar can detect both physiological information (heartbeat, respiration) and body temperature simultaneously by processing different signal components from the same reflected radar signal, eliminating the need for separate detection systems
Solution Approach 2:
The patent combines previously separate detection functions into a unified radar system. By integrating physiological signal detection and temperature measurement capabilities into one FMCW radar device, the system reduces overall device complexity while maintaining comprehensive detection coverage
3Measurement precision
If complex signal processing is used to separate feature signals and sense signals, then detection accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent segments the reflected signal into distinct components: feature signals containing physiological information and sense signals containing temperature information. By separating these signal types through systematic processing steps (mixing, filtering, FFT analysis), the system achieves high detection accuracy while maintaining manageable processing complexity
Solution Approach 2:
The patent uses an intermediary processing approach where the reflected signal is first mixed with a reference signal to generate intermediate frequency signals, then processed through filtering and spectral analysis. This intermediary processing stage enables accurate separation of different signal components without requiring overly complex direct processing
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 FMCW radar system effectively increases detection accuracy, simplifies circuit complexity, and reduces manufacturing costs, enabling simultaneous detection of physiological information and sensor data, thus addressing the urgent need for efficient monitoring in care settings.
Implementation Method 1
The transmitter module transmits the radar signal to the object. The receiver module receives a reflection signal from the object.
Implementation Method 2
An FMCW (Frequency Modulated Continuous Wave) radar system that includes a chirp signal generator, transmitter module, receiver module, processing module, and computing module, capable of generating and analyzing radar signals to detect both physiological signals and sensor-related information
Data Source
AI summary
An FMCW (Frequency Modulated Continuous Wave) radar and a detection method thereof are provided. The FMCW radar for detecting an object with a sensor includes a chirp signal generator, a transmitter module, a receiver module, a processing module, and a computing module. The chirp signal generator generates a radar signal. The transmitter module transmits the radar signal to the object. The receiver module receives a reflection signal from the object. The reflection signal includes a feature signal and a sense signal. The processing module generates an integrated digital signal according to the reflection signal and the radar signal. The computing module analyzes the integrated digital signal, so as to obtain first digital information and second digital information. The first digital information corresponds to the feature signal. The second digital information corresponds to the sense signal.