3D All-Round Body Surface Detection Using Velocity-Triggered Microwave Scanning
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Solution Overview
Problem
Current security scanning technologies, such as metal detectors and x-ray radiation, are inadequate for detecting non-metallic objects like ceramic knives and explosives, and existing microwave-based systems struggle to capture a real-time, motion-free 3D all-round view of moving body surfaces due to rapid movement velocities, leading to potential undetection of concealed objects.
Innovation Solution
A method and device that determine the movement velocity of body surface regions and detect them at timing points where the velocity falls below a defined threshold, using microwave radiation and tracking sensors like TOF cameras, to avoid motion-blurring and ensure complete 3D all-round views are obtained, even during movement through a walk-through passageway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If real-time imaging systems with measurement time less than 1 ms and image repetition rates greater than 10 Hz are used to scan moving body surface, then motion-blurred images are avoided, but the systems become technically very difficult to realise and cost intensive
Solution Approach 1:
The system dynamically adjusts the measurement timing based on the movement velocity of body surface regions. Instead of using a fixed high-speed imaging system, the measurement is triggered adaptively when the movement velocity falls below a threshold value, allowing the use of simpler, less expensive imaging equipment while still avoiding motion blur in the final reconstructed image.
2Productivity
If the body surface is scanned during rapid movement through a walk-through passageway, then security scanning efficiency is improved, but motion-blurring occurs and objects may remain undiscovered
Solution Approach 1:
The system performs preliminary tracking of body surface regions using tracking sensors to determine their movement velocities before the actual detection phase. This preliminary action allows the system to identify when regions are moving slowly enough for accurate detection, enabling selective measurement timing that ensures detection accuracy while maintaining overall scanning efficiency.
Solution Approach 2:
The system uses feedback from tracking sensors that continuously monitor the movement velocity of body surface regions. This feedback information is used to dynamically control the timing of the detection phase, ensuring that measurements are taken at optimal moments when motion blur is minimized, thereby maintaining both scanning efficiency and detection accuracy.
3Adaptability or versatility
If microwave radiation is used for security scanning of persons, then non-metallic objects like ceramic knives and explosives can be detected, but the system cannot capture real-time 3D all-round views of moving body surfaces without motion-blurring
Solution Approach 1:
The body surface is divided into multiple regions that are tracked and detected separately. Each region is monitored by tracking sensors, and detection is performed selectively based on the movement velocity of each individual region. This segmentation allows the microwave detection system to capture still images of specific regions at optimal moments rather than requiring a complete real-time 3D capture of the entire moving body surface.
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 the detection of non-metallic objects like weapons and explosives by providing a cost-effective and technically simple means to achieve real-time, motion-free 3D all-round views of moving body surfaces, ensuring comprehensive security scanning without motion-blurring and reducing reconstruction time and costs.
Implementation Method 1
The detection is especially implemented by means of microwave radiation
Implementation Method 2
tracking sensors like TOF cameras
Data Source
AI summary
The present disclosure relates to a method for the registration of a 3-dimensional all-round view of a moving human or animal body surface. The method accordingly comprises the steps: determination (A) of a movement velocity of at least one region of the body surface and registration (B) at least of the region of the body surface at a timing point at which the value of the movement velocity of this region falls below a defined threshold value.