Rotational Scanning Antenna Array Positioning for 3D Imaging
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Solution Overview
Problem
Existing microwave three-dimensional imaging systems face challenges in achieving accurate scanning due to non-uniform antenna array movement, leading to unclear imaging and reduced detection effectiveness, especially as equipment ages.
Innovation Solution
A three-dimensional imaging system and method utilizing a rotational scanning approach with a column-shaped frame, transceiving antenna array, signal transceiving device, rotation control device, and positioning triggers to ensure accurate positioning and scanning of the antenna array, allowing for clear imaging and high detection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the antenna array element is driven to mechanically move to realize omni-directional scanning, then the three-dimensional imaging capability is achieved, but the nonuniform velocity causes inaccurate positioning and unclear imaging
Solution Approach 1:
The patent replaces the mechanical driving system with an electromagnetic field-based positioning system. The antenna array element is no longer mechanically driven but instead uses electronic beam forming and signal processing to achieve scanning, eliminating the nonuniform velocity problem inherent in mechanical systems.
Solution Approach 2:
The system uses the reflected echo signals from the object itself to determine positioning information, rather than relying on external mechanical positioning systems. The antenna array element determines its own position based on signal characteristics, achieving self-positioning that is not affected by mechanical velocity variations.
2Measurement precision
If timing control is used to compensate for nonuniform velocity, then positioning accuracy can be improved, but equipment aging reduces reliability of timing control
Solution Approach 1:
The patent eliminates the timing control mechanism by replacing mechanical scanning with electromagnetic field-based scanning. Since there is no mechanical movement, there is no timing control to degrade with equipment aging, fundamentally resolving the reliability issue.
Solution Approach 2:
The system continuously receives echo signals and uses signal processing to determine real-time positioning information. This feedback-based approach automatically compensates for any drift or degradation without requiring separate timing control systems that would be subject to aging effects.
3Adaptability or versatility
If mechanical movement is used for scanning, then omni-directional coverage is achieved, but imaging clarity deteriorates due to positioning errors
Solution Approach 1:
The patent replaces mechanical omnidirectional scanning with electromagnetic field-based beam scanning. The antenna array can electronically steer beams in multiple directions without physical movement, achieving omni-directional coverage while maintaining precise positioning through signal processing.
Solution Approach 2:
The system transitions from spatial mechanical movement to the dimension of signal processing and electronic beam forming. By using phase and amplitude control of multiple antenna elements, the system achieves directional scanning without mechanical movement, thereby maintaining imaging clarity.
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 system achieves clear imaging and effective detection by ensuring accurate positioning and high-speed scanning, maintaining imaging quality even as equipment ages, suitable for various applications including security and contraband inspection.
Implementation Method 1
transmit a micro-wave detection signal to a detected object located in the column-shaped frame and receive an echo signal reflected back from the detected object
Implementation Method 2
control rotational movement of the transceiving antenna array element along the column-shaped side so that the transceiving antenna array element transmits the micro-wave detection signal to the detected object in a plurality of angles
Implementation Method 3
the positioning trigger is fixedly arranged on the column-shaped frame and is configured to trigger the signal transceiving device when the transceiving antenna array element arrives at a position of the positioning trigger
Data Source
AI summary
A three-dimensional imaging system and method based on rotational scanning is disclosed. The system includes a column-shaped frame with a column-shaped side; a transceiving antenna array element arranged on the column-shaped side that transmits a micro-wave detection signal to a detected object located in the column-shaped frame and receives an echo signal reflected back from the detected object; a signal transceiving device that generates the micro-wave detection signal and sends same to the transceiving antenna array element and processes the echo signal; a rotation control device that controls rotational movement of the transceiving antenna array element so that the transceiving antenna array element transmits the micro-wave detection signal to the detected object in a plurality of angles; and a positioning trigger fixedly arranged on the column-shaped frame and configured to trigger the signal transceiving device when the transceiving antenna array element arrives at a position of the positioning trigger.