Motor Control for Two-Wheeler Maintenance Detection
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Solution Overview
Problem
During maintenance of motor-driven two-wheelers, such as bicycles, the risk of unintentional motor activation poses a hazard when the vehicle is tilted for access, potentially causing injuries from rotating pedal cranks or wheels.
Innovation Solution
A method and device that detect the maintenance situation using sensor variables like inclination or driving dynamics to control the motor, reducing or shutting off drive power to prevent accidents, with optional notification to the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the motor is activated to support movement during maintenance, then the vehicle can be moved or positioned, but the risk of unintentional activation causes injury hazards
Solution Approach 1:
The system performs preliminary detection of maintenance situations using sensor variables (inclination, acceleration, GPS) before the motor can cause harm. By identifying the maintenance state in advance through threshold comparisons, the system proactively prevents unintentional activation rather than reacting after activation occurs.
Solution Approach 2:
The control unit continuously monitors sensor variables and provides feedback to the motor control system. When the inclination variable exceeds the first threshold or the second sensor variable exceeds the second threshold, the feedback loop automatically reduces or shuts off drive power, creating a closed-loop safety mechanism that adapts to the maintenance situation.
2Object-affected harmful factors
If the motor is completely shut off during maintenance, then safety is improved, but the motor cannot be quickly reactivated when maintenance is complete
Solution Approach 1:
The motor control system dynamically adjusts its state based on real-time sensor input rather than remaining statically shut off. The system transitions between active, reduced power, and shut-off states depending on whether maintenance conditions are detected, allowing quick adaptation when the maintenance situation changes without requiring manual intervention.
Solution Approach 2:
The system automatically detects when maintenance is complete through sensor variable changes and self-reactivates the motor without requiring manual input from the user. The control unit continuously monitors the inclination and dynamic variables, and when they return to normal ranges, the motor is automatically restored to full functionality.
3Object-affected harmful factors
If sensor variables are continuously monitored to detect maintenance situations, then safety is improved, but the device complexity increases
Solution Approach 1:
The system uses multi-functional sensor variables that serve both normal vehicle operation and maintenance detection purposes. The same inclination and acceleration sensors used for ride control and stability also detect maintenance situations, eliminating the need for dedicated maintenance detection hardware and reducing overall system complexity.
Solution Approach 2:
The system detects maintenance situations by monitoring changes in existing sensor parameters (inclination angle, acceleration values, GPS location) rather than adding new sensors. By establishing threshold values for these existing parameters, the system transforms normal operational data into maintenance detection signals without increasing hardware complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents injuries by reliably identifying maintenance situations and automatically controlling the motor to prevent unwanted rotation, ensuring safer maintenance practices.
Implementation Method 1
the position of the two-wheeler, i.e. the orientation of the two-wheeler in relation to the ground or the roadway, is detected using a first sensor variable... the position is detected by changing an acceleration variable or an inclination variable of the two-wheeler
Data Source
AI summary
The invention relates to a method for detecting a maintenance situation (110) in a two-wheeled vehicle (100) and to a device for carrying out such a method. The invention is characterized in that the motor, which is located on the two-wheeled vehicle (100) and is provided for at least temporarily supporting the movement of the two-wheeled vehicle, is actuated depending on the detected maintenance situation (110). Such a maintenance situation can be detected by detecting the position of the two-wheeled vehicle using a first sensor variable (S1). The actuation of the motor is then carried out either as a reduction of the applied drive power, for example in the form of the rotational speed or the torque, or also as a complete deactivation or blocking of the motor.