Label Applicator Calibration via Package Height Detection
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Solution Overview
Problem
Label applicators in conveyor systems face challenges in maintaining accurate label placement on packages due to environmental fluctuations, wear of components, and varying package heights, leading to decreased precision and increased errors, especially when applying labels to moving packages.
Innovation Solution
A closed-loop system with cameras and photoelectric sensors provides feedback for calibrating label applicators, using unique calibration data for each package height to optimize label placement, ensuring accurate and precise application on both stationary and moving packages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If labels are applied on moving packages to increase throughput, then productivity is improved, but manufacturing precision deteriorates
Solution Approach 1:
The system performs preliminary calibration by capturing images of packages at multiple known positions before label application. This pre-calibration data is used to establish the relationship between camera positions and package features, enabling accurate label placement on moving packages without requiring manual calibration for each package.
Solution Approach 2:
The system implements feedback by continuously capturing images of packages during conveyance, detecting package features, and using this real-time visual information to adjust and refine label placement calculations. This closed-loop feedback ensures accurate label application even as packages move through the system.
2Manufacturing precision
If manual calibration is performed to maintain accurate label placement, then manufacturing precision is improved, but loss of time increases
Solution Approach 1:
The system performs self-calibration by automatically capturing images of packages at known positions, detecting features, and computing calibration parameters without human intervention. This autonomous calibration process eliminates the need for manual calibration operations while maintaining high placement accuracy across varying package types and conveyor conditions.
Solution Approach 2:
The system performs preliminary calibration during initial system setup and periodically thereafter, capturing images and establishing positional relationships in advance. This pre-computed calibration data is stored and applied automatically during label application, eliminating the need for frequent manual calibration interventions.
3Manufacturing precision
If the label applicator is calibrated for specific package heights, then manufacturing precision is improved, but adaptability deteriorates
Solution Approach 1:
The system transitions from static calibration for fixed package heights to dynamic calibration that adapts to each package's actual dimensions. By capturing images of each package and detecting its specific features, the system computes customized calibration parameters for each package height and orientation, maintaining accurate label placement across diverse package types without requiring multiple pre-configured calibration settings.
Solution Approach 2:
The system changes calibration parameters dynamically based on detected package characteristics. Instead of using fixed calibration values for specific package heights, the system adjusts calibration parameters for each package based on its actual dimensions, orientation, and position, enabling accurate label placement across varying package specifications through parameter adaptation rather than preconfiguration.
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 system improves label placement accuracy and throughput by autonomously calibrating the label applicators, reducing errors and adapting to different package heights, thus enhancing overall processing efficiency in conveyor systems.
Implementation Method 1
A camera is situated to identify a position of the package on the conveyor belt
Implementation Method 2
A photoelectric sensor can be used to determine a height of the package
Data Source
AI summary
Disclosed are various embodiments for systems and methods for calibrating a label applicator for improved accuracy and/or precision on moving objects. In one example, a system may be configured to receive a height of a package on a conveyor path prior to the package reaching a label applicator. The system can be configured to determine a predicted tamp time for the package based on the height. The predicted tamp time can represent an estimated period of time for a tamp head to apply a label on the package. The system also can instruct a controller operating a label applicator to activate the tamp head for the package based on the predicted tamp time. The system can receive an actual tamp time from the controller after the label has been applied to the package and update the modeling coefficient based on a tamp time error.