Electrified Cabinet Latch With Temperature-Adaptive Actuation
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Solution Overview
Problem
Cabinet locks in traffic control signal boxes are unmonitored, prone to unauthorized access, and suffer from sluggish or inoperative latch movement in extreme temperatures, compromising security and functionality.
Innovation Solution
An electromechanical cabinet lock system with a motor-driven actuator, position sensor, and temperature sensor that powers the actuator based on detected temperature, enabling remote monitoring and dynamic adjustment of motor drive parameters to ensure smooth latch operation across varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical key switch is used to operate the latch, then the cabinet lock structure is simple, but the system cannot be remotely monitored and is prone to unauthorized access
Solution Approach 1:
The patent replaces the purely mechanical key switch system with an electromechanical actuator system. The actuator includes a motor, drive screw, and position sensor that can be controlled remotely and monitored electronically, eliminating the need for physical key manipulation while enabling remote monitoring capabilities.
Solution Approach 2:
The patent incorporates position sensors that detect the latch member's position and provide feedback signals to indicate whether the cabinet is locked or unlocked. This feedback mechanism enables remote monitoring of the lock status without requiring physical inspection or complex additional hardware.
2Reliability
If standard motor drive parameters are used, then the actuator operates normally in moderate temperatures, but the latch movement becomes sluggish or inoperative in extremely cold temperatures
Solution Approach 1:
The patent implements dynamic motor drive parameters that automatically adjust based on detected temperature conditions. The control system modifies motor voltage, current, or pulse duration in real-time according to the ambient temperature, ensuring consistent latch operation across varying thermal environments without requiring manual intervention or mechanical modifications.
Solution Approach 2:
The patent changes the electrical parameters of the motor drive system based on temperature sensing. When cold temperatures are detected, the system adjusts motor parameters such as increasing voltage or current to compensate for the increased viscosity of lubrication materials, thereby maintaining reliable latch movement in extreme cold conditions.
3Speed
If the actuator is continuously powered to ensure immediate response, then the latch operation is always ready, but energy consumption increases
Solution Approach 1:
The patent employs periodic or on-demand actuation rather than continuous powering. The actuator is activated only when a control signal is received or when temperature adjustments are needed, rather than running continuously. This periodic operation maintains system readiness while significantly reducing overall energy consumption compared to continuous operation.
Data Source
AI summary
An electromechanical component for a locking mechanism is provided. The locking mechanism includes a latching component having a latch member reciprocally movable between a locked orientation and an unlocked orientation. The electromechanical component comprises a drive member configured to be coupled to the latch member, an actuator operably coupled to the drive member, a temperature sensor for sensing an ambient temperature associated with the locking mechanism; and a printed circuit board (PCB) in communication with the temperature sensor and the actuator. When the PCB receives a control signal to move the latch member between the locked orientation and the unlocked orientation, and the temperature sensor senses that the ambient temperature is below a predetermined threshold temperature, the PCB is configured to direct a pulsed current signal to the actuator to move the latch member between the locked orientation and the unlocked orientation.