Battery-Assisted Bicycle Range Display Update
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Solution Overview
Problem
Battery-assisted bicycles face a time lag in displaying the remaining assistable travel distance, which can lead to uncertainty when changing the proportion of electric motor assistance, potentially making it difficult to reach destinations.
Innovation Solution
A battery-assisted bicycle system that includes a motor control part, battery control part, and assistable distance calculating part, capable of promptly displaying the assistable travel distance based on the remaining battery level and changed assistance proportion, using an electricity consumption rate calculated according to the assistance mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the remaining assistable travel distance is calculated based on actual battery consumption over time, then the calculation accuracy is improved, but the response time increases causing a time lag in display updates
Solution Approach 1:
The system pre-calculates and stores electricity consumption rates for multiple assistance modes before actual riding occurs. When a rider selects an assistance mode, the corresponding pre-calculated consumption rate is immediately retrieved and used for real-time distance calculations, eliminating the need to wait for actual consumption data to accumulate.
Solution Approach 2:
The system dynamically switches between different electricity consumption rates based on the selected assistance mode. Each mode has its own characteristic consumption rate stored in advance, allowing the calculation system to adapt instantly to changing riding conditions without requiring retraining or recalculation periods.
2Adaptability or versatility
If the proportion of electric motor assistance is increased, then the rider's travel capability is improved, but the remaining assistable travel distance shortens
Solution Approach 1:
The display unit provides real-time feedback to the rider showing both the remaining assistable travel distance and the current assistance level. This allows riders to understand the trade-off between assistance intensity and range, enabling them to make informed decisions about when to adjust assistance levels to optimize both travel capability and remaining distance.
Solution Approach 2:
The system allows riders to change the assistance parameter (proportion of motor support) based on real-time feedback about remaining distance. By dynamically adjusting this parameter, riders can optimize their travel strategy - using higher assistance when needed and lower assistance to conserve battery when the destination is within reachable distance.
Data Source
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AI summary
A battery-assisted bicycle capable of promptly displaying, when the proportion of assistance is changed, the remaining assistable travel distance corresponding to the changed proportion of assistance is provided. Abattery-assisted bicycle 1 includes a motor control part 111a that controls driving of the electric motor 61 in accordance with a pedal effort, a battery 36, a battery control part 37 that determines the remaining level of the battery 36, and an assistable distance calculating part 111b that calculates the assistable travel distance of the electric motor 61 based on the remaining level of the battery 36. The motor control part 111a is configured so as to be capable of changing the proportion of the assistance of the electric motor 61 to the pedal effort. The assistable distance calculating part 111b calculates the assistable travel distance of the electric motor 61 in accordance with the change of the proportion of assistance in the motor control part 111a.