Pre-cover Power-off via Motion Sensor and Bolt Casing
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Solution Overview
Problem
Existing methods for power-off in coal mines and flammable/explosive environments fail to cut off power supply before opening a cover, leading to live operations and accidents.
Innovation Solution
A pre-cover-opening power-off method and apparatus that uses a motion sensor connected to a safety monitoring unit to send a signal to cut off power supply and trigger an alarm before the cover is opened, employing a bolt casing, lock, key, lock core, and motion sensor to ensure safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automatic power-off upon cover-opening is implemented, then safety during maintenance is improved, but power supply cannot be cut off before the cover is opened
Solution Approach 1:
The motion sensor detects the cover opening action and triggers the safety protecting and monitoring unit to cut off power supply before the cover is fully opened, performing the power-off action in advance rather than after opening. This preliminary action ensures both safety and timely power cutoff.
Solution Approach 2:
The motion sensor provides real-time feedback on the cover opening status to the safety protecting and monitoring unit, which then automatically responds by cutting off power supply. This closed-loop feedback mechanism ensures power is cut off at the appropriate moment during the opening process.
2Reliability
If motion sensor and safety monitoring unit are added, then pre-cover-opening power-off capability is improved, but device complexity increases
Solution Approach 1:
The safety protecting and monitoring unit serves multiple functions: it receives signals from the motion sensor, controls power supply cutoff, and can integrate with existing safety systems. This multi-functionality reduces the need for separate dedicated components for each function.
Solution Approach 2:
The motion sensor acts as an intermediary between the mechanical cover opening action and the electrical power supply control system. It converts mechanical motion into an electrical signal that triggers the power cutoff, bridging the physical and control domains efficiently.
3Reliability
If bolt casing with lock and motion sensor is integrated, then prevention of unauthorized access is improved, but ease of operation deteriorates
Solution Approach 1:
The bolt casing integrates multiple functions: mechanical fastening, locking mechanism, and mounting for the motion sensor. By combining these functions into a single integrated component, the overall number of separate parts is reduced, and installation is simplified despite the enhanced security features.
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
Effectively prevents live operations during equipment overhaul by cutting off power supply and triggering alarms before the cover is opened, enhancing safety in coal mines and similar hazardous environments.
Implementation Method 1
connecting a motion sensor to a safety protecting and monitoring unit in a wired or wireless manner, (c) activating the motion sensor to send out a command to permit power delivery for an electrical equipment to operate, and when the bolt casing is taken off, the motion sensor is activated to send out a command to cut off a power supply
Data Source
AI summary
A pre-cover-opening power-off method, comprising the steps of: (a) fixing a bolt casing to a bolt; (b) connecting a motion sensor to a safety protecting and monitoring unit in a wired or wireless manner; and (c) activating the motion sensor to send out a command to permit power delivery for an electrical equipment to operate, and when the bolt casing is taken off, the motion sensor is activated to send out a command to cut off a power supply for the electrical equipment or give out an alarm.