Multi-Sensor Calibration Tool Using Universal Geometric Targets
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Solution Overview
Problem
Current calibration tools for multiple sensors, such as imaging systems, require different checkerboard targets, leading to time-consuming and less accurate calibration processes due to the use of multiple reference units.
Innovation Solution
A sensor system calibration tool featuring a plurality of geometric objects configured to be perceived differently by various sensors (visual spectrum, thermal, range) and a thermal control device with heating elements attached to specific geometric objects, allowing for simultaneous calibration across multiple sensor types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If different checkerboard targets are used for different imaging systems, then each sensor type can be calibrated accurately, but the calibration process becomes time-consuming and requires multiple reference units
Solution Approach 1:
The calibration target is designed with geometric objects that can be perceived in different ways by multiple sensor types (visual, thermal, range sensors). The same physical target serves as a universal reference for calibrating different imaging systems simultaneously, eliminating the need for multiple specialized checkerboard targets while maintaining calibration accuracy for each sensor type
2Measurement precision
If multiple different checkerboard targets are used for calibration, then each sensor type receives its optimized reference, but the overall calibration process becomes more complex
Solution Approach 1:
Multiple sensor-specific calibration features are merged into a single integrated calibration target. The target includes geometric objects with properties that enable them to be detected and measured by visual sensors, thermal sensors, and range sensors simultaneously, simplifying the calibration process by consolidating multiple reference units into one
3Productivity
If a single calibration tool is used for multiple sensor types, then calibration time is reduced, but the tool must accommodate diverse sensor requirements
Solution Approach 1:
The calibration target is designed with geometric objects that possess multiple perceptual properties simultaneously. The same geometric structures provide detectable features for visual spectrum sensors through reflectivity variations, for thermal sensors through temperature differences, and for range sensors through geometric configuration, enabling a single tool to adapt to diverse sensor requirements
Solution Approach 2:
Different regions of the calibration target have locally optimized properties for different sensor types. Specific geometric objects or regions are designed with particular thermal, optical, or geometric characteristics that make them optimally detectable by specific sensor types, while the overall target remains a unified structure
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 proposed solution enables efficient and accurate simultaneous calibration of multiple sensors using a single calibration tool, overcoming the limitations of traditional methods by providing a unified reference for disparate sensor types.
Implementation Method 1
a thermal control device with heating elements attached to specific geometric objects
Implementation Method 2
The geometric objects are configured to be perceived in one of two different ways for a first type of sensor
Data Source
AI summary
Disclosed herein is calibration tool, system, and method for performing multi-sensor calibration. A sensor system calibration tool includes a plurality of geometric objects disposed adjacent to each other, the geometric objects are configured to be perceived in one of two different ways for a first type of sensor and one of two different ways for a second type of sensor.