Monolithic Planar Array Sensor for Moving Target Detection
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Solution Overview
Problem
Current technologies face challenges in accurately detecting moving targets using multiple sensor images on the same platform due to short inter-channel imaging time intervals, leading to detection errors and reduced signal-noise ratio, especially in low illumination or fast scanning scenarios.
Innovation Solution
A detection method and system utilizing multiple mutually independent image sensors arranged on a monolithic planar array sensor, where sensors are equidistantly arranged in the traveling direction of a satellite, allowing for precise synchronization and on-board pre-processing to enhance the accuracy and efficiency of moving target detection, including signal subtraction and velocity computation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple sensor images with short inter-channel imaging time intervals are used for moving target detection, then detection speed and responsiveness are improved, but detection accuracy deteriorates due to target movement over sub-pixel distances
Solution Approach 1:
The patent divides the detection task into multiple independent sensor channels, each capturing images at different time points. By segmenting the detection process across multiple sensors rather than using a single sensor, the system can process short-interval images more effectively and compensate for sub-pixel movements through multi-channel data fusion.
Solution Approach 2:
The patent performs preliminary registration and alignment of images from multiple sensors before detection. By pre-processing the images to account for expected target movement based on known sensor timing intervals and platform motion, the system prepares the data in advance to maintain detection accuracy despite the short time intervals between captures.
2Reliability
If multiple independent image sensors are used for moving target detection, then detection reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple independent image sensors onto a single monolithic planar array sensor platform. By merging the sensors into one integrated device rather than using separate physical sensors, the system achieves improved detection reliability through multiple sensing channels while reducing overall device complexity and synchronization requirements.
Solution Approach 2:
The monolithic planar array sensor serves multiple functions simultaneously - it acts as both the platform structure and the sensing element for multiple independent image sensors. This multi-functionality reduces the need for separate mounting structures, alignment mechanisms, and synchronization systems, thereby reducing device complexity while maintaining reliability.
3Productivity
If on-board pre-processing is performed to reduce data volume, then processing efficiency is improved, but computational complexity on the platform increases
Solution Approach 1:
The patent extracts and performs only the essential pre-processing operations on-board, specifically image registration and basic feature extraction, while leaving more complex analysis for ground-based processing. By taking out only the critical preprocessing steps needed to handle the short time intervals and sub-pixel movements, the system improves processing efficiency without overwhelming the platform's computational resources.
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
This approach improves the accuracy and efficiency of moving target detection, reducing data volume and computational complexity, while ensuring precise velocity calculation and effective recognition of moving targets, particularly in emergency response scenarios.
Implementation Method 1
n mutually independent image sensors arranged on a monolithic planar array sensor... collecting image data by each image sensor
Data Source
AI summary
A detection method and system are used for a moving target based on multiple sensors on the same platform. N mutually independent image sensors arranged on a monolithic planar array sensor compose an image sensor group, which has a layout where n image sensors are arranged equidistantly on the same line in a travelling direction of a satellite. The method includes respectively collecting image data by the multiple sensors, performing on-board pre-processing to the image data collected by each image sensor, acquiring an image from the received pre-processed image data, and performing operation to the image from different image sensors, to recognize the moving target. The system includes sequentially connected sensor groups, an image data pre-processing device and a wireless transmitting device, a wireless receiving device wirelessly connected with the wireless transmitting device, and a moving target recognition device connected with the wireless receiving device.