Electronic Lock Motor Current Detection for Positioning
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Solution Overview
Problem
Conventional electronic locks face challenges in space arrangement and cost due to the use of multiple micro switches, which can lead to inefficiencies and increased expenses.
Innovation Solution
An electronic lock design incorporating a motor module and a controller with a driver module, current detecting module, and control module, which uses a predetermined current condition to determine when to stop the motor operation, eliminating the need for multiple micro switches and enhancing operational efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple micro switches are used to detect the state of the lock bolt module, then the reliability of state detection is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts the state detection function from multiple micro switches and implements it through current detection. The controller monitors current changes in the motor module to infer the lock bolt module's position state, eliminating the need for separate micro switch components while maintaining detection reliability.
Solution Approach 2:
The motor module serves multiple functions: it not only drives the lock bolt module but also acts as a sensing element through its current characteristics. The same motor module that performs actuation also provides state information through current monitoring, reducing the need for separate detection components.
2Measurement precision
If multiple micro switches are used to detect the state of the lock bolt module, then the state detection accuracy is improved, but the manufacturing cost increases
Solution Approach 1:
The motor module serves multiple functions: it not only drives the lock bolt module but also acts as a sensing element through its current characteristics. The same motor module that performs actuation also provides state information through current monitoring, reducing the need for separate detection components.
Solution Approach 2:
The patent replaces the mechanical micro switch system with an electrical current detection system. Instead of using mechanical switches to detect position, the system uses electrical current characteristics to infer mechanical state, thereby reducing component count and manufacturing complexity.
3Measurement precision
If the motor module operates continuously to ensure accurate positioning, then the positioning accuracy is improved, but the energy consumption increases
Solution Approach 1:
The controller continuously monitors the current drawn by the motor module and uses this feedback to determine when the lock bolt module has reached its target position. When the current changes indicate that positioning is complete, the controller stops the motor, preventing unnecessary energy consumption while maintaining accurate positioning.
Solution Approach 2:
Instead of continuous operation, the motor module operates in periodic pulses controlled by the controller. The controller activates the motor, monitors current to detect position changes, and stops the motor when positioning is complete, creating an on-demand operation pattern that reduces energy consumption.
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
This design reduces manufacturing costs and prevents malfunctions associated with electronic switch components, allowing for accurate locking and unlocking operations without relying on electronic switch components.
Implementation Method 1
The current detecting module is disposed to detect the driving current
Implementation Method 2
The motor module is connected to the transmission module, and is electrically operable to perform a lock operation
Data Source
AI summary
An electronic lock includes a lock mechanism operable to change a state thereof between a lock state and an unlock state, and an electric control device including a motor module and a controller. The motor module is electrically operable to perform a lock operation or an unlock operation on the lock mechanism. The controller is configured to, when the lock mechanism changes the state thereof, determine whether a driving current provided to drive operation of the motor module satisfies a predetermined current condition. The controller stops driving operation of the motor module after determining at least that the driving current satisfies the predetermined current condition.