Dynamic Detection Area Adjustment for Conveyance Device Head Alignment
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Solution Overview
Problem
In image forming processes, such as inkjet printing, improper timing or position alignment of the conveyed object can lead to deviations or misalignment, resulting in suboptimal image quality due to the inability to accurately detect and adjust for the object's position and movement.
Innovation Solution
A conveyance device and system equipped with sensors to obtain surface data of the conveyed object, calculating detection results for position, speed, and movement, and adjusting a detection area based on these results to accurately control the operation of head units, ensuring precise alignment and movement adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed detection area is used for calculating position and movement of the conveyed object, then the device complexity is reduced, but the manufacturing precision deteriorates due to inability to adapt to position deviations
Solution Approach 1:
The detection area is made dynamically adjustable based on the detected position of the conveyed object. The processor dynamically sets the detection area according to the detected position, allowing the system to adapt to position deviations and maintain high manufacturing precision without requiring complex mechanical adjustments.
Solution Approach 2:
The system changes the parameters of the detection area (position and size) based on the detected object position. By adjusting the detection area parameters dynamically, the system maintains optimal detection accuracy even when the conveyed object experiences position deviations during operation.
2Manufacturing precision
If the detection area is adjusted based on first detection results, then the manufacturing precision is improved, but the loss of time increases due to iterative detection and adjustment processes
Solution Approach 1:
The system performs preliminary detection to obtain the position of the conveyed object, then uses this information to preliminarily adjust the detection area before final measurement. This preliminary action allows the system to focus subsequent detection efforts on the relevant area, reducing overall detection time while maintaining precision.
Solution Approach 2:
The system implements a feedback mechanism where the first detection result is used to adjust the detection area for second detection. This feedback loop enables the system to quickly converge on the optimal detection parameters, reducing the time required to achieve high manufacturing precision through iterative refinement.
3Manufacturing precision
If sensors are provided for each head unit to obtain surface data, then the manufacturing precision is improved, but the device complexity and cost increase
Solution Approach 1:
Each sensor is designed to perform multiple functions: obtaining surface data of the conveyed object, detecting position information, and providing data for both first and second detection results. This multi-functionality allows the system to achieve high manufacturing precision with a relatively simple sensor configuration, as each sensor contributes to multiple aspects of the detection process.
Data Source
AI summary
A conveyance device includes a conveyor to convey a conveyed object, a head unit to perform an operation on the conveyed object, a sensor to obtain surface data of the conveyed object, provided for each head unit, and at least one processor. The processor is configured to calculate a first detection result including at least one of a position, a speed of movement, and an amount of movement of the conveyed object based on the surface data, set a detection area based on the first detection result, calculate a second detection result using the detection area according to the first detection result. The processor is further configured to control operation of the at least one head unit based on the second detection result.