Card Alignment via Rollers and Single Sensor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current image scanning devices face issues with skewed card alignment, incomplete scanning due to sensor misalignment, and higher manufacturing costs due to the need for multiple sensors, resulting in poor scanning quality and increased production expenses.
Innovation Solution
An improved image scanning method utilizing two groups of rollers and a single image sensing element to adjust card alignment within the scanning channel, ensuring the card does not project beyond the scanning area, thereby preventing incomplete scans and reducing the need for multiple sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple sensors are used to detect card position, then scanning completeness is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts and eliminates the need for multiple sensors by using a single sensor combined with roller-driven card positioning. The second sensor mentioned in the background is removed, and its function is replaced by the mechanical positioning system that ensures the card is correctly aligned before scanning, thereby reducing component count and manufacturing cost while maintaining scanning completeness.
Solution Approach 2:
The patent introduces rollers as an intermediary mechanism between the card and the scanning system. These rollers actively position and align the card within the scanning channel, ensuring that a single sensor can adequately detect card presence and position. This intermediary mechanical system replaces the need for multiple sensors, resolving the contradiction between scanning completeness and manufacturing cost.
2Ease of operation
If card is fed backward to stop position, then scanning preparation is improved, but card alignment stability deteriorates
Solution Approach 1:
The patent applies preliminary action by using rollers to pre-position and align the card in the scanning channel before the scanning process begins. The card is fed backward to a stop position and held there by the rollers, ensuring proper alignment is established in advance. This preliminary mechanical positioning stabilizes the card, preventing skewing during the scanning operation while maintaining ease of scanning preparation.
3Adaptability or versatility
If rollers are used to feed card, then card positioning flexibility is improved, but card skewing increases
Solution Approach 1:
The patent changes the operational parameters of the rollers, specifically controlling their rotation speed and direction. By precisely managing the rotational parameters, the rollers can feed the card smoothly in both forward and backward directions without causing skewing. The parameter control ensures that while positioning flexibility is maintained through bidirectional feeding, the card alignment accuracy is preserved by avoiding excessive friction and uneven force application.
Data Source
AI summary
An image scanning method applied in an image scanning device capable of scanning a card. Record background values at the time of a card being without being in a scanning channel, and the background values recorded at the time of the card being without being in the scanning channel are regarded as preset values. Before the card is scanned, check whether the background values in the scanning channel conform to the preset values. Drive the card to move a distance Y. Check whether the background values in the scanning channel conform to the preset values. Preset a preset movement distance, check whether a movement distance of the card or a distance of accumulated movements of the card exceeds the preset movement distance. Display that the card is stuck. Stop checking and proceeding with an image calibration. Start scanning the card. Complete scanning the card and withdraw the card.