E-Bike Reverse Assist With Rear Sensing and Motor Braking
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Solution Overview
Problem
Conventional electric bicycles lack a reverse function and insufficient safety measures during reversing, particularly when transporting cargo, leading to potential accidents due to inadequate collision detection and speed control.
Innovation Solution
A device and method for assisting reverse movement of electric bicycles, equipped with rear sensors (proximity, radar, ultrasonic, and image sensors) and a controller that determines the need for motor braking based on detected objects and speed, ensuring safe and stable operation by blocking current and applying opposite torque to the motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electric bicycles are equipped with reverse function, then cargo loading/unloading capability is improved, but safety risks during reversing increase
Solution Approach 1:
The system performs preliminary detection of rearward obstacles using sensors before initiating reverse movement. The controller monitors the rear environment in advance and determines whether it is safe to reverse, preventing accidents by detecting obstacles before the bicycle moves backward.
Solution Approach 2:
The system continuously monitors rearward space during reverse movement using sensors and provides real-time feedback to the controller. Based on this feedback, the controller adjusts or terminates reverse movement to ensure safety, creating a closed-loop control system that adapts to changing conditions.
2Measurement precision
If multiple sensors are installed for rear detection, then collision detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple different types of sensors (ultrasonic, infrared, radar, or camera sensors) into a single integrated rear detection system. These sensors work together to detect obstacles, with the controller processing signals from all sensors to determine collision risk, achieving high detection accuracy while managing system complexity through integration.
3Reliability
If braking control is implemented during reverse movement, then collision prevention is improved, but control complexity increases
Solution Approach 1:
The system uses the existing motor to provide braking force during reverse movement, rather than requiring a separate mechanical braking system. The controller controls the motor to generate braking force when obstacles are detected, utilizing the motor's own capability to stop or slow the bicycle, thereby preventing collisions without adding complex external braking mechanisms.
Data Source
AI summary
Disclosed are a device and method for assisting reverse movement of an electric bicycle, and a non-transitory computer readable storage medium storing a program for performing the method. The device for assisting reverse movement of an electric bicycle according to an aspect of the present disclosure is a device for assisting reverse movement of an electric bicycle that can receive driving force for rotation of a wheel from a motor, and may include a rear sensor capable of detecting an object present at the rear of the electric bicycle; and a controller that, when the electric bicycle moves backwards, determines whether braking control of the motor is necessary based on detection information from the rear sensor, and performs braking control of the motor if it is determined that braking control of the motor is necessary.