Microwave Imaging Reflector Scanning Mechanism
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Solution Overview
Problem
Current microwave imaging devices are limited by large, expensive, and energy-consuming sensors, which hinder the creation of high-resolution images with a large number of pixels, and require complex structures and longer scanning times, constraining their use in security applications.
Innovation Solution
The implementation of a microwave imaging device with a limited number of sensors and a movable reflector system that scans the detection zone, allowing for rapid image acquisition and calibration, using a rotating reflector within a cylinder to minimize disturbances and improve scanning speed and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large number of microwave sensors are used to achieve high-resolution images with many pixels, then image quality is improved, but device size, cost, and energy consumption increase significantly
Solution Approach 1:
The patent introduces a temporal dimension to the imaging process by using a single microwave sensor that scans across the scene over time. Instead of capturing all spatial information simultaneously with multiple sensors, the system acquires data sequentially through scanning, thereby reducing the number of sensors from thousands to just one while maintaining high-resolution imaging capability through time-multiplexed measurement
Solution Approach 2:
The patent uses a scanner system that replicates the measurement process across different spatial positions. A single sensor is moved or scanned across the scene to capture multiple measurement points, effectively creating a complete image through repeated measurements. This copying approach allows one sensor to perform the work of thousands of static sensors
2Device complexity
If a scanner system is used to move sensors along the scene, then the number of sensors can be reduced, but the structure becomes more complex and scanning time increases
Solution Approach 1:
The patent replaces the traditional mechanical scanner that physically moves the sensor with an electromagnetic field-based approach. The system uses electromagnetic radiation to probe the scene from multiple positions without requiring physical movement of the sensor assembly, thereby eliminating complex mechanical scanning mechanisms while maintaining the ability to acquire spatially-resolved data
Solution Approach 2:
The patent performs preliminary calibration and positioning of the sensor system before actual imaging. The scanner is pre-configured with knowledge of the scene geometry and sensor characteristics, allowing rapid acquisition during the actual imaging phase. This preliminary preparation enables the system to achieve high scanning speeds without compromising measurement accuracy
3Length of stationary object
If sensors are positioned in immediate proximity to the person being measured, then scanning distance is reduced, but movement speed is constrained and structure becomes more complex
Solution Approach 1:
The patent introduces a reflector as an intermediary element between the microwave sensor and the person being measured. The reflector is positioned close to the person to maintain short measurement distances, while the sensor remains at a fixed, convenient location. This intermediary allows the system to achieve both short effective measurement distance and sensor stability without requiring the sensor to move into close proximity
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 rapid generation of high-resolution images with a larger number of pixels while reducing the number of sensors and energy consumption, enhancing scanning speed and stability, and allowing for reliable and accurate imaging in security contexts.
Implementation Method 1
reflector means configured to reflect the electromagnetic radiation that can be picked up by the first microwave sensor or the set of microwave sensors
Data Source
AI summary
The present invention relates to an imaging device (1) comprising:a first microwave sensor or set of microwave sensors (2), preferably radiometric sensors, each microwave sensor (2) being configured to pick up electromagnetic radiation emitted or reflected by bodies or objects situated in a detection zone of said microwave sensor (2); andreflector means (6) configured to reflect the electromagnetic radiation that can be picked up by the first microwave sensor or the set of microwave sensors (2).In particular, the reflector means (6) are mounted to move in the detection zone of each microwave sensor (2) in such a manner as to move said detection zone by moving the reflector means (6). The invention also provides a corresponding microwave imaging method.