Ultra-Wideband Radar Imaging for 3D Object Motion Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional ultra-wideband radar systems can only detect the distance between an object and the radar, failing to identify the 2D or 3D position of the object in space or differentiate between objects at the same distance, and require image comparison to determine motion.
Innovation Solution
The method involves transmitting ultra-wideband microwave signals from multiple detecting positions to detected positions, analyzing signal delay times to generate a reference gray-scale image, and comparing time-varying distance variations to present the object's motion in real-time, using a system comprising a transmitter, receiver, and signal processing modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional ultra-wideband radar systems are used to detect object distance, then the distance measurement is achieved, but the 2D or 3D position of the object in space cannot be identified
Solution Approach 1:
The patent transitions from one-dimensional distance measurement to two-dimensional position identification by introducing multiple detecting positions arranged in space. Each detecting position provides distance measurement, and the combination of these measurements enables calculation of the object's 2D or 3D position coordinates, thereby adding spatial dimensionality to the detection capability.
Solution Approach 2:
The patent divides the detection system into multiple independent detecting positions, where each position performs distance measurement separately. This segmentation allows the system to gather multiple distance data points from different spatial locations, which are then processed to determine the object's complete position in space.
2Measurement precision
If conventional ultra-wideband radar systems are used, then distance detection is achieved, but objects at different locations with identical distance cannot be differentiated
Solution Approach 1:
The patent resolves the ambiguity of objects at identical distance by adding spatial position as an additional dimension. Multiple detecting positions provide distance measurements that vary even when objects are at the same distance from the radar, enabling differentiation between objects based on their unique spatial coordinates rather than just distance.
Solution Approach 2:
Each detecting position provides local distance information specific to its location in space. By analyzing the pattern of distance measurements from multiple positions, the system can identify the unique spatial configuration of each object, allowing differentiation between objects that would otherwise appear identical in terms of distance alone.
3Productivity
If image comparison method is used to detect motion, then motion detection is achieved, but real-time detection capability is reduced
Solution Approach 1:
The patent replaces the mechanical process of comparing multiple images with a direct signal processing approach. Instead of capturing sequential images and comparing them, the system uses multiple detecting positions to simultaneously measure distance variations, converting the motion detection problem into a signal analysis problem that can be solved in real-time without image comparison overhead.
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 real-time detection and imaging of the object's 2D or 3D position and motion by analyzing distance variations, overcoming the limitations of prior art by accurately identifying object positions and motion without the need for image comparison.
Implementation Method 1
transmitting at least a first ultra-wideband microwave signal from a plurality of detecting positions along a direction to a plurality of first detected positions of a object
Implementation Method 2
receiving at least a second ultra-wideband microwave signal at the detecting positions, the second ultra-wideband microwave signal being reflected from the first detected positions of the object
Implementation Method 3
analyzing a plurality of reference signal delay times for the second ultra-wideband microwave signal received at the detecting positions and analyzing a plurality of reference distances between the first detected positions and the respective detecting positions accordingly
Data Source
AI summary
A method for detecting the motion of object by ultra-wideband radar imaging and system thereof to be used to present the motion of object in a reference gray-level image by using the delay time to analyze the distance between the detected position of object and the detecting position to compare the time-varying distance variation between the reference distance and the detecting distance. The system includes a transmitter module, a receiver module and a signal processing module. The transmitter module is used to transmit a first ultra-wideband signal from a detecting position to the object. The receiver module is used to receive a second ultra-wideband signal reflected from the object in the detecting position. The signal processing module is used to analyze the signal delay time of the second ultra-wideband signal received in the detecting position to analyze the detecting distance between the second ultra-wideband signal and the detecting position.