Handheld Millimeter-Wave Radar Imaging for Safe Screening
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Solution Overview
Problem
Conventional systems for obtaining images through opaque materials, such as X-ray and ultrasound systems, are bulky, expensive, and pose health hazards due to ionizing radiation or require unavailable acoustic transmission paths, while millimeter-wave imaging systems need improvement for handheld screening devices.
Innovation Solution
A handheld screening device that takes a sequence of active radar images at different distances, selects and displays the most relevant image using a processor, and includes a warning system for proximity detection, utilizing millimeter-wave imaging and distance evaluation sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If X-ray systems are used to obtain images through opaque materials, then image detection capability is improved, but device portability and safety are worsened due to bulkiness, cost, and ionizing radiation hazards
Solution Approach 1:
The patent changes the electromagnetic parameter from ionizing radiation (X-ray) to non-ionizing millimeter waves, eliminating radiation hazards while maintaining image detection capability through opaque materials. The system uses millimeter-wave radar to detect and image objects hidden behind obstacles without the harmful effects of X-rays.
2Measurement precision
If conventional X-ray or ultrasound systems are used, then imaging function is achieved, but device portability is worsened due to bulky structure
Solution Approach 1:
The patent extracts the essential imaging function from bulky conventional systems and implements it using compact millimeter-wave radar components. By using miniaturized antennas, signal processing circuits, and integrated electronics, the system achieves portable handheld form factor while maintaining object detection and imaging capabilities.
3Weight of moving object
If millimeter-wave imaging systems are used for handheld screening, then device portability is improved, but image quality and usability are worsened due to lack of distance selection capability
Solution Approach 1:
The patent implements dynamic image selection based on distance information. The system captures multiple images at different distances and allows users to selectively view images from specific distance ranges. This dynamic adaptation to user needs improves usability by enabling focused inspection of objects at desired distances, making the handheld device more operationally effective.
4Weight of moving object
If millimeter-wave imaging systems are used, then device portability is improved, but system functionality is worsened due to lack of safety warning features
Solution Approach 1:
The patent incorporates feedback mechanisms including distance measurement and proximity warning functions. The system continuously monitors distance to objects and provides real-time feedback through visual or audible warnings when objects are too close, enhancing safety while maintaining portable handheld operation.
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, safe, and user-friendly imaging for detecting hidden objects by providing a three-dimensional image as a two-dimensional representation on a handheld device, with improved usability and safety compared to conventional systems.
Implementation Method 1
Millimeter-waves are particular useful for detecting objects in an active radar system, i.e. by emitting electromagnetic waves in the millimeter-wavelength region and detecting and processing/analyzing reflected or scattered electromagnetic waves.
Implementation Method 2
a distance evaluation sensor to evaluate a distance of an object to the handheld screening device
Data Source
AI summary
A method for displaying an active radar image of an object on a handheld screening device is provided comprising taking a sequence of active radar images of an object, the different active radar images of the sequence being representative for different distances of the object from the handheld screening device; selecting an image of the sequence of active radar images; and displaying the selected image on a display. A corresponding handheld screening device is provided as well.