Moving-Object Imaging Using an Object-Fixed Scattering Field
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Solution Overview
Problem
Imaging devices struggle to accurately image a moving object in a measurement area using existing technologies, as the existing imaging devices are not capable of imaging a moving object with high accuracy due to the uncertainty in the position of the object when it moves in the measurement area.
Innovation Solution
An imaging device that includes a plurality of transmitters, receivers, and an information processing circuit that derives a scattering field function using a coordinate system with a fixed object position in at least two directions, allowing for accurate imaging of a moving object by deriving a scattering field function and an imaging function from measurement data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing imaging techniques are used to image a moving object, then the imaging process can be performed with simple equipment, but the imaging accuracy deteriorates due to position uncertainty of the moving object
Solution Approach 1:
The patent transforms the imaging approach by changing the reference frame parameter - instead of fixing the transmitters and receivers and letting the object move, the patent fixes the object's position in the coordinate system and accounts for its motion through mathematical transformation. This allows accurate imaging of moving objects without requiring complex tracking equipment or multiple transmitters/receivers.
2Measurement precision
If the position of a moving object is tracked to improve imaging accuracy, then the imaging precision improves, but the system complexity increases due to the need for position tracking mechanisms
Solution Approach 1:
The patent replaces mechanical position tracking systems with a mathematical coordinate transformation approach. By defining a coordinate system that moves with the object and using velocity vector information in the imaging function, the system achieves accurate imaging without physical tracking mechanisms, thereby avoiding increased device complexity.
3Measurement precision
If more transmitters and receivers are deployed to image moving objects accurately, then the imaging accuracy improves, but the device complexity and cost increase
Solution Approach 1:
The patent achieves accurate imaging of moving objects with a small number of transmitters and receivers by changing the imaging parameters - specifically, by using a coordinate system that accounts for object motion through velocity vector information. This mathematical approach compensates for the limited number of physical devices.
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 imaging device can accurately image a moving object by fixing its position, enabling high-accuracy imaging without requiring the transmitters and receivers to move, even with a small number of devices.
Implementation Method 1
a plurality of transmitters 101 that each transmit a wave to a measurement area; a plurality of receivers 102 that each receive a scattered wave of the wave from the measurement area
Data Source
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AI summary
An imaging device (100) includes: a plurality of transmitters (101) that each transmit a wave to a measurement area; a plurality of receivers (102) that each receive a scattered wave of the wave from the measurement area; and an information processing circuit (103) that images an object in the measurement area using measurement data of the scattered wave. The information processing circuit (103): derives a scattering field function using the measurement data and a velocity vector of the object; derives an imaging function that is defined using an amount output from the scattering field function in response to inputting an imaging target position into the scattering field function; and images the object in the measurement area using the imaging function. The information processing circuit (103) derives the scattering field function from the measurement data using a coordinate system in which the position of the object is fixed.