Battery-Backed Door Control With Current-Based Balance Check
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Solution Overview
Problem
Existing automated door control systems are vulnerable to power failures and require complex control mechanisms, making them unreliable and inefficient.
Innovation Solution
A door control system that includes a DC motor, a spring for balancing the door, and a controller that balances the system by measuring electrical currents during opening and closing operations to determine if the system is balanced, allowing for efficient operation even during power outages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If AC motors are used for automated door control, then automation capability is improved, but system complexity and vulnerability to power failures increase
Solution Approach 1:
The patent replaces AC motors with DC motors powered by a battery system, substituting an electrically complex system with a simpler mechanical-electrical hybrid system that uses direct current motors and spring mechanisms, thereby reducing control system complexity while maintaining automation
Solution Approach 2:
The patent changes the power source parameter from AC power supply to DC battery power, and adjusts the motor type from AC to DC, enabling the system to operate during power outages and reducing dependency on complex power infrastructure
2Extent of automation
If AC motors with complex control systems are used, then automated operation is improved, but reliability during power failures deteriorates
Solution Approach 1:
The patent incorporates a spring mechanism that is pre-loaded to provide mechanical assistance during door operation. This preliminary mechanical energy storage ensures the door can be opened or closed even when electrical power is unavailable, maintaining reliability during power failures
Solution Approach 2:
The spring-loaded mechanism provides self-service by automatically assisting the motor during door operation without requiring external power input. The spring stores and releases mechanical energy independently, ensuring the system can service itself during power outages
3Ease of operation
If spring tension is increased to balance the door, then operation during power outages is improved, but battery life and spring durability deteriorate
Solution Approach 1:
The patent uses a spring mechanism configured to counterbalance the weight of the door, creating a near-neutral equilibrium state. This reduces the force required from the motor during normal operation, thereby extending battery life while maintaining the ability to operate during power outages
Solution Approach 2:
The system dynamically adjusts the operational parameters by using the spring to offset gravitational force, changing the effective weight parameter that the motor must overcome from the full door weight to a minimized residual force, thus preserving battery energy
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
The system ensures reliable operation during power interruptions and extends the life of the battery and spring by maintaining a balanced state, reducing power consumption and preventing damage or injury.
Implementation Method 1
A motor (102) coupled to the door (106)
Implementation Method 2
A spring (150) may provide a tensile force to door (106)
Implementation Method 3
determining whether the door control system is balanced based on a magnitude of the first electrical current and the magnitude of the second electrical current
Data Source
AI summary
A door control system is provided. The control system includes a controller configured to control a door via a motor. The motor is powered by a battery and bypasses the controller via relays and/or switches when power to the controller is disconnected. The current of the motor may be monitored and/or displayed to confirm that the door is balanced.