Centralized Access Control for Factory Machinery Safety
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing access control systems for secure areas in factories require users to memorize codes and lack centralized management, leading to inefficiencies and safety concerns due to stand-alone systems for each machinery cell.
Innovation Solution
A method and apparatus that utilize communications devices to receive and verify location and operator identifiers, controlling access to machinery by providing control signals to a central controller, allowing centralized management and eliminating the need for code memorization, while ensuring safe operation modes for human interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a known access control system using access codes is implemented, then access to machinery can be controlled and safety can be ensured, but users must memorize codes and each cell requires a stand-alone system
Solution Approach 1:
The patent merges multiple stand-alone access control systems into a single centralized system. The centralized control unit consolidates the control logic for all cells, allowing unified management of access codes and coordination across multiple machinery cells. This eliminates the need for separate independent systems in each cell while maintaining access control safety.
Solution Approach 2:
The centralized control unit serves multiple functions: it manages access codes for all cells, coordinates machinery shutdown sequences across multiple cells, tracks access records centrally, and provides overall system monitoring. This multi-functional approach replaces multiple specialized stand-alone systems with a single universal control unit.
2Object-affected harmful factors
If machinery is stopped or placed in safe mode before access is allowed, then operator safety is ensured, but productivity is reduced due to machinery downtime
Solution Approach 1:
The system performs preliminary actions by pre-coordinating the shutdown sequence across multiple machinery cells before an operator needs to access a specific cell. The centralized control unit identifies which cells need to be stopped, executes their shutdown in advance, and only then grants access to the required cell. This minimizes the total downtime by avoiding unnecessary shutdowns of cells that don't need to be stopped.
Solution Approach 2:
The system segments the factory area into multiple independent cells, each with its own access control. The centralized control unit can selectively stop only the specific cells that require maintenance or attention, while allowing other cells to continue operating. This segmentation enables localized access control without forcing a complete factory shutdown.
3Ease of operation
If each cell has a stand-alone access control system, then access to individual machinery can be controlled, but centralized management and monitoring is not possible
Solution Approach 1:
The centralized control unit receives feedback signals from all cell controllers regarding access attempts, machinery status, and operational conditions. It maintains a central record of all access events, who entered which cells, when they entered, and what machinery was involved. This centralized information gathering provides comprehensive monitoring and record-keeping capabilities.
Solution Approach 2:
The centralized control unit acts as an intermediary between the individual cell controllers and the central management system. It receives requests from mobile devices, verifies access codes, coordinates with cell controllers to grant or deny access, and maintains centralized records. This intermediary role enables centralized management while preserving the independence of individual cell operations.
Data Source
AI summary
According to an aspect of the present invention, there is provided a method and apparatus for controlling access to a restricted area containing machinery. The method comprises receiving from a communications device a location identifier associated with said restricted area and a further identifier, verifying said location identifier and said further identifier, and controlling access to said restricted area based upon said verifying. Controlling access to said restricted area comprises providing a control signal to a controller associated with said restricted area. The controller is arranged to control said machinery in response to said control signal.