Radar Position Tracking for Gap-Free Portable Scanning
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Solution Overview
Problem
The challenge of creating a smaller and lighter portable scanner for security checks while maintaining image resolution is hindered by the reduction in antenna aperture length, making it difficult to scan areas without overlap or gaps.
Innovation Solution
A system utilizing a radar unit with a transmit array antenna and receive array antenna, combined with a measurement unit and processor, allows for scanning multiple areas by generating images based on reflected electromagnetic waves, and a display that guides staff to avoid overlaps or gaps during scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the scanner is made smaller and lighter, then the portability and ease of operation are improved, but the antenna aperture length becomes smaller and the image resolution becomes lower
Solution Approach 1:
The patent applies synthetic aperture processing to extend the effective aperture length by combining measurements from multiple scanning positions. Instead of relying on a physically large antenna aperture, the system synthesizes a larger aperture through signal processing of data collected at different locations, thereby achieving high resolution with a compact scanner design
Solution Approach 2:
The patent divides the scanning process into multiple discrete positions and uses a measurement unit to track the scanner's position at each measurement point. By segmenting the overall scanning area into multiple positions and combining the results, the system achieves the equivalent of a larger aperture without increasing the physical size of the scanner
2Measurement precision
If the antenna aperture length is increased by scanning multiple adjacent areas, then the image resolution is improved, but the difficulty of operation increases due to the challenge of shifting the scanner without overlap or gaps
Solution Approach 1:
The patent introduces a measurement unit that provides real-time feedback on the scanner's position during the scanning process. This feedback mechanism allows the system to automatically track and record the scanner's location at each measurement point, eliminating the need for manual positioning and ensuring accurate coverage of the scanning area without overlaps or gaps
Solution Approach 2:
The system performs self-positioning and automatic image synthesis by utilizing the measurement unit to track its own movement. The processor automatically combines the scanned data from multiple positions based on the recorded position information, making the system self-sufficient and eliminating the need for operator intervention in positioning and image integration
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 efficient scanning of multiple areas without overlaps or gaps, maintaining high resolution through synthetic aperture processing and virtual array antennas, facilitating easy and accurate detection of hidden objects.
Implementation Method 1
a radar unit 10 configured to irradiate electromagnetic waves on a target and receive reflected electromagnetic waves from the target
Data Source
AI summary
According to one embodiment, a system includes a radar configured to irradiate electromagnetic waves on a target and receive reflected electromagnetic waves from the target, an imaging unit configured to image the target and output target image information, a measurement unit configured to measure a position of the radar, and a processor configured to output first image information representing a first area within the target where the electromagnetic waves are not irradiated based on the position of the radar.