Mower Brake Motor Control for Automatic Anomaly Braking
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Solution Overview
Problem
Existing outdoor traveling devices require high user operation levels for mechanical braking, which can be challenging and inefficient.
Innovation Solution
A manned mower with a brake mechanism triggered by a brake motor, controlled by a controller that switches between braking and release states, and includes a power supply mechanism with separate battery packs for the walking and brake motors, along with a control mechanism to manage anomalies and provide user feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical braking is used triggered by user operation, then the braking function can be implemented, but the user operation level requirement becomes high and operation becomes complex
Solution Approach 1:
The brake mechanism performs self-service by automatically activating when anomalies are detected through sensors monitoring the mowing assembly, power supply mechanism, or control mechanism. The system monitors its own state and triggers braking without requiring user judgment or operation, thereby improving reliability while reducing operational complexity.
Solution Approach 2:
The system implements feedback through sensors that continuously monitor the operational state of various components (mowing assembly, power supply, control mechanism) and provide information to the controller. When abnormal conditions are detected, the controller automatically activates the brake mechanism, creating a closed-loop control system that enhances safety without requiring user intervention.
2Reliability
If automatic anomaly detection and braking control is implemented, then braking efficiency and safety are enhanced, but device complexity increases
Solution Approach 1:
The control system is segmented into independent functional modules: sensors for detecting anomalies in the mowing assembly, power supply mechanism, and control mechanism; a controller for processing sensor information; and a brake motor for executing braking actions. This modular segmentation manages complexity by dividing the automatic control function into discrete, manageable components with clear interfaces.
Solution Approach 2:
The controller acts as an intermediary between the sensor network and the brake mechanism. It receives signals from various sensors monitoring different system components, processes this information, and activates the brake motor when necessary. This intermediary role simplifies the overall system architecture by providing a centralized decision-making point that coordinates the automatic braking response.
3Reliability
If separate battery packs are used for walking motor and brake motor, then power supply reliability is improved, but device complexity and weight increase
Solution Approach 1:
The power supply system is segmented into two independent battery packs: one dedicated to the walking motor and another dedicated to the brake motor. This segmentation ensures that the brake motor has a dedicated power source that is not affected by the power consumption or failure of the walking motor system, thereby improving power supply reliability for safety-critical braking operations.
Solution Approach 2:
The system changes the power supply parameter from a single shared battery to separate dedicated batteries. This parameter change prioritizes reliability over weight reduction, ensuring that the brake motor always has adequate power availability independent of the walking motor's power demands, which is critical for safe operation.
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
Enhances braking efficiency and safety by automating braking operations, reducing user intervention, and providing real-time feedback, thus improving operational reliability and ease of use.
Implementation Method 1
a brake motor connected to the brake mechanism and configured to drive the brake mechanism to switch between the braking state and the release state
Implementation Method 2
a brake mechanism configured to perform a braking action to brake the walking mechanism
Implementation Method 3
The controller is further configured to, when receiving an anomaly signal, control the brake motor to operate
Data Source
AI summary
A manned mower includes a brake mechanism configured to perform a braking action to brake a walking mechanism; a controller configured to control operation of at least the walking mechanism and a mowing assembly; and a brake motor connected to the brake mechanism and configured to drive the brake mechanism to switch between a braking state and a release state. The controller is further configured to, when receiving an anomaly signal, control the brake motor to operate to drive the brake mechanism to switch from the release state to the braking state.