An automatic door opening system and a method thereof
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Solution Overview
Problem
Current automatic door opening systems in electrical devices face issues such as damage from user intervention to close the door, potential damage from obstructions, and malfunction during power cuts, as they lack bidirectional motor control and safe return mechanisms.
Innovation Solution
The system employs a bidirectional motor with a gear mechanism and memory unit to control a rod that opens and safely returns to its initial position, allowing user-assisted closure and preventing damage from obstructions and power cuts by monitoring current and using an internal power source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pushing mechanism is used to open the door automatically, then the door can be opened without user intervention, but the mechanism may be damaged if the user pushes the door to close it or if there is an obstruction
Solution Approach 1:
The motor is designed to operate bidirectionally, allowing it to dynamically switch between opening and closing operations. This dynamic capability enables the motor to safely reverse direction when encountering resistance or user intervention, preventing mechanism damage while maintaining automatic operation functionality
Solution Approach 2:
The control unit monitors the operational state of the motor and rod mechanism, enabling it to detect when the door is fully opened or when resistance is encountered. This feedback mechanism allows the system to stop the motor appropriately and, if necessary, reverse direction to prevent damage, thus resolving the contradiction between automatic operation and mechanism protection
2Device complexity
If the motor rotates in one direction only, then the structure is simpler, but the rod cannot return to initial position for safe user-assisted closure
Solution Approach 1:
The motor is designed to perform multiple functions: opening the door by rotating in one direction and returning to the initial position by rotating in the opposite direction. This multi-functionality allows a single motor to handle both forward and reverse operations, maintaining structural simplicity while enabling safe user-assisted closure
Solution Approach 2:
The motor control system dynamically switches between clockwise and counter-clockwise rotation based on operational requirements. This dynamic bidirectional control enables the rod to move forward for opening and backward for returning, achieving both simplicity and safety without requiring separate motors for each direction
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
Ensures safe operation and prevents mechanism damage by allowing bidirectional motor control, enabling safe return of the rod and door, even in the presence of obstructions or power cuts, thus maintaining system integrity.
Implementation Method 1
at least one motor; at least one electrical circuit for allowing the motor to perform bidirectional rotational movement by using a single voltage input
Implementation Method 2
at least one gear mechanism which is in connection with the shaft and the rod, allows the rod to move forward as a result of rotation of the motor in a first direction by transferring the rotational movement of the motor from the shaft to the rod
Data Source
AI summary
An automatic door opening system suitable for use in an electrical device which comprises a body having an inner chamber, a door hinged to the body from one side, and a processing unit, the automatic door opening system comprising: a rod which allows the door to open by applying a pushing force to the door while moving in a forward direction, and allows the door to be released when the rod brings into the backward position by moving in the backward direction; a motor; an electrical circuit for allowing the motor to perform bidirectional rotational movement by using a single voltage input; a shaft which is in connection with the motor; a gear mechanism which is in connection with the shaft and the rod, allows the rod to move forward as a result of rotation of the motor in a first direction by transferring the rotational movement of the motor from the shaft to the rod, and allows the rod to move backward as a result of rotation of the motor in a second direction, characterized by comprising a memory unit for storing the time during which the motor performs its rotational movement while the rod is moved forward; and a control unit which is in connection with the processing unit, the memory unit and the motor, which, when the rod is in the backward position, allows the motor to move in a first direction when a command for opening the door is received from the processing unit, which allows the motor to stop when the door is brought into the opened position, and which, when a command for releasing the door is received from the processing unit, allows the motor to rotate in the second direction for a time that is stored at the memory unit.