E-bike Display Device for Secure Performance Attribute Switching
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Solution Overview
Problem
Existing electric bicycles lack a user-friendly and secure method to change performance attributes, such as classification, without violating regulatory requirements, and there is a need for a system that ensures compliance with geographical and legal performance attributes.
Innovation Solution
The electric bicycle is equipped with a display device and a human machine interface (HMI) that allows users to change performance attributes only after a restart of the bicycle, within a predetermined time frame, and displays feedback on successful changes while ensuring compliance with legal and geographical regulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If users can freely change performance attributes at any time, then user control and adaptability are improved, but regulatory compliance and security are worsened
Solution Approach 1:
The system requires users to perform a restart action before changing performance attributes. This preliminary action ensures that attribute changes only occur at defined transition points, maintaining regulatory compliance while still allowing user control. The restart requirement prevents arbitrary changes during operation that could violate regulations.
Solution Approach 2:
The system dynamically adjusts when attribute changes are permitted based on the operational state of the e-bike. Changes are only allowed after a restart and within a specific time window, creating a dynamic control mechanism that balances user adaptability with regulatory requirements.
2Ease of operation
If performance attributes can be changed quickly without restrictions, then ease of operation is improved, but the ability to detect and prevent misuse is worsened
Solution Approach 1:
The display device provides feedback to users about the timing and status of attribute changes. It shows when the e-bike has restarted and whether the current time is within the permissible change window, making the system easy to operate while creating an audit trail for detection purposes.
Solution Approach 2:
The system performs preliminary timing measurements from the restart event to establish a predetermined time frame. This creates a measurable, detectable window for attribute changes that can be monitored and verified.
3Reliability
If the system monitors and restricts performance attribute changes, then regulatory compliance is improved, but device complexity is worsened
Solution Approach 1:
The display device serves multiple functions: it displays operational information, tracks restart events, monitors time elapse, and controls attribute change permissions. By making the display a multi-functional component, the system achieves regulatory compliance monitoring without adding separate dedicated hardware for each function.
Solution Approach 2:
The system combines the timing measurement, restart detection, and attribute change control functions into a single integrated control logic. This merging reduces overall system complexity compared to having separate systems for each function.
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
An electric bicycle (50) includes a frame (56), a front wheel (52) supporting the frame (56), a rear wheel (54) supporting the frame (56), a motor (60) coupled to the frame (56), a crankset (93) coupled to the motor (60), and a display device (102a) coupled to the frame (56). The display device (102a) is configured to display a performance attribute of the electric bicycle (50), and is further configured to display how long the electric bicycle (50) has been set to the performance attribute.