3D Sensor Self-Calibration in Robots Under Vibration and Heat
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Solution Overview
Problem
Existing technologies do not provide automatic accuracy confirmation and correction for three-dimensional sensors used in robots, leading to issues such as incorrect distance measurement and loss of three-dimensional information due to changes in camera positions or optical system deterioration.
Innovation Solution
A robot system equipped with a three-dimensional sensor, a notification unit, and a determination unit that automatically checks for deviations in the optical system based on physical quantity fluctuations, such as operation frequency, temperature changes, and mechanical stress, and performs recalibration as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual calibration is performed at factory shipment or when used, then initial accuracy is achieved, but accuracy deteriorates over time due to vibration, acceleration, temperature changes, and impact
Solution Approach 1:
The system continuously monitors physical quantities (vibration, acceleration, temperature) and automatically triggers recalibration when threshold values are exceeded, creating a closed-loop feedback mechanism that maintains measurement accuracy despite environmental changes and mechanical stress
Solution Approach 2:
The three-dimensional sensor performs self-diagnosis and automatic recalibration without requiring external intervention. The system autonomously detects anomalies in its own optical system and corrects them by recalibrating using stored reference data, enabling the sensor to maintain its own accuracy
2Measurement precision
If automatic recalibration is implemented, then measurement accuracy is maintained, but system complexity increases
Solution Approach 1:
The control unit performs multiple functions: it controls robot operations, monitors physical quantities, detects calibration anomalies, and executes recalibration procedures. By consolidating these functions into a single control unit, the system avoids adding separate dedicated hardware for each function, thereby limiting complexity increase
3Measurement precision
If frequent calibration checks are performed, then accuracy is maintained, but operation time is reduced due to maintenance intervals
Solution Approach 1:
Instead of continuous calibration checks that would constantly interrupt operation, the system performs periodic monitoring of physical quantities and only triggers recalibration when predetermined threshold values are exceeded. This allows the sensor to operate continuously without interruption unless calibration is actually needed
Solution Approach 2:
The system autonomously monitors its own calibration status and performs self-correction without requiring shutdown or external intervention. The automatic detection and recalibration process occurs in the background, minimizing disruption to continuous operation
Data Source
AI summary
Provided is a robot capable of automatically confirming the accuracy of a three-dimensional sensor and correcting the accuracy. The robot comprises: a three-dimensional sensor; a notification unit for notifying a determination timing for determining a deviation of an optical system of the three-dimensional sensor, on the basis of a change in a physical quantity related to the three-dimensional sensor; and a determination unit for determining whether or not there is a deviation at the optical system of the three-dimensional sensor. The change in the physical quantity includes at least one of acceleration and the number of times of acceleration and deceleration added to the three-dimensional sensor, a change in temperature of the three-dimensional sensor within a certain period, a change in temperature of the three-dimensional sensor within a total operating period, and the number of times of change in temperature of the three-dimensional sensor within the total operating period.