Card Reading System Alignment via Positioning Features
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Solution Overview
Problem
Users, especially young children, face difficulties in neatly arranging cards for programming due to lack of finger dexterity, leading to self-propelled devices deviating from the card sequence and failing to read subsequent cards reliably.
Innovation Solution
A card reading system with self-propelled carriages equipped with cameras that recognize infrared patterns on cards, allowing for precise navigation and alignment, ensuring the carriage stays on the intended path by using coded coordinates and positioning features on the cards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If users manually array cards to create command sequences, then programming learning is achieved, but alignment accuracy deteriorates due to limited finger dexterity
Solution Approach 1:
A self-propelled reading device is introduced as an intermediary between the user and the card sequence. The device automatically navigates along the arrayed cards using positioning parts that engage with corresponding features on each card, eliminating the need for users to manually position the reader and ensuring consistent reading accuracy regardless of user dexterity.
Solution Approach 2:
The manual mechanical positioning operation is replaced with an automated system. The self-propelled device uses mechanical engagement between positioning parts on the device and corresponding features on the cards to maintain alignment, substituting user manual positioning with an automated mechanical guidance system.
2Ease of operation
If cards are loosely arrayed to accommodate user difficulty, then ease of arrangement is improved, but reading reliability deteriorates due to device deviation
Solution Approach 1:
The reading device acts as a mediator that bridges the gap between loosely arrayed cards and reliable reading. The positioning parts on the device engage with corresponding features on each card, providing mechanical guidance that maintains reading reliability even when cards are not tightly aligned, as long as the positioning features remain accessible.
3Reliability
If strict card alignment is enforced to ensure reading accuracy, then reading reliability is improved, but ease of operation deteriorates for users with limited dexterity
Solution Approach 1:
The alignment function is segmented between the cards and the reading device. The cards contain positioning features (such as notches or protrusions) that provide alignment references, while the reading device contains corresponding positioning parts that engage with these features. This segmentation allows cards to be loosely arrayed while maintaining reading accuracy through the engagement mechanism.
4Measurement precision
If manual card positioning is required for each card, then reading precision is improved, but time consumption increases
Solution Approach 1:
The reading device performs self-positioning along the card sequence through automatic navigation. The positioning parts on the device automatically engage with corresponding features on each card as the device moves along the sequence, eliminating the need for manual repositioning between cards and significantly reducing the time required for the reading process.
Data Source
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AI summary
The present invention aims to make a self-propelled reading device read cards more reliably. Each of the cards includes a first end part configured to be adjacent to another card in a predetermined direction; a second end part configured to be on the opposite side of the first end part and adjacent to another card different from the first end part; and a surface printed with a pattern in which are coded coordinates indicating a positional relation relative to a reference line extended in the predetermined direction indicative of a region in which a self-propelled device is to travel. Each of the first and the second end parts has a positioning part regulating how the other card adjacent to the end part is to be placed. The positioning parts and the reference line have a predetermined positional relation therebetween.