Self-Calibrating Inspection Motion for Trajectory Accuracy
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Solution Overview
Problem
Existing visual inspection devices often deviate from their expected motion trajectories, leading to reduced inspection or measurement accuracy.
Innovation Solution
A self-calibrating inspection system with a distance sensor and correction member to determine deviations from a predetermined trajectory, allowing real-time correction of the inspection device's motion using a controller to align with the intended path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a visual inspection device is moved relative to the product for inspection, then inspection coverage is improved, but motion trajectory deviation reduces measurement precision
Solution Approach 1:
The system employs a distance sensor to continuously measure the actual distance between the inspection device and the product surface, comparing it with the predetermined distance. The controller receives this feedback and automatically adjusts the motion trajectory of the inspection device to maintain the correct distance, thereby resolving the trajectory deviation issue while preserving comprehensive inspection coverage
Solution Approach 2:
The patent replaces purely mechanical motion control with a combined system that uses optical sensing (distance sensor) and electronic control (controller) to achieve precise trajectory correction. This substitution allows real-time compensation for mechanical inaccuracies without compromising inspection coverage
2Measurement precision
If the motion trajectory of the inspection device is strictly controlled, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system achieves self-correction of motion trajectory through the automatic feedback loop. The distance sensor continuously monitors the actual distance, the controller calculates deviations, and the motion actuator automatically adjusts the inspection device position without requiring external intervention or complex manual calibration procedures
Solution Approach 2:
The distance sensor serves multiple functions: it measures the actual distance for feedback control, detects product surface characteristics, and provides data for trajectory correction. This multi-functionality reduces the need for separate specialized components, thereby limiting the increase in system complexity
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
Ensures high accuracy in visual inspection or measurement by automatically adjusting the motion trajectory of the inspection device to match the predetermined path.
Implementation Method 1
a distance sensor fixedly positioned relative to the inspection device and adapted to sense a first spacing between the distance sensor and the correction member
Data Source
AI summary
A self-calibrating inspection system includes an inspection device adapted to visually inspect or measure an article placed on a carrier, and a motion actuator moving the inspection device along a predetermined motion trajectory relative to the carrier and the article placed thereon. A correction member of the system is fixedly positioned with respect to the carrier. A distance sensor is fixedly positioned relative to the inspection device and adapted to sense a first spacing between the distance sensor and the correction member during the movement of the inspection device by the motion actuator. A controller communicates with the motion actuator and the distance sensor for determining a deviation between an actual motion trajectory of the inspection device moved by the motion actuator and the predetermined motion trajectory based on the first spacing, and to control the motion actuator based on the deviation to move the inspection device along a path substantially consistent with the predetermined motion trajectory.