Modular Safety Units With Wireless Links for Hazardous Machines
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Solution Overview
Problem
Current safety systems for hazardous machines and processes are complex, costly, and time-consuming to install and maintain, with high requirements for customization, certification, and documentation, and lack flexibility and efficiency in cable management.
Innovation Solution
A programmable safety system with integrated safety units that reduce the need for extensive cabling and manual inspections, featuring wireless communication and modular design, allowing for easy installation, modification, and certification of safety functions within a compact and standardized framework.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional safety systems with control cabinets are used, then safety functions can be provided, but installation and maintenance become time-consuming and costly due to extensive cabling and manual inspections
Solution Approach 1:
The patent replaces the mechanical cabling system with a wireless communication system. Safety units communicate with the control unit via wireless signals, eliminating the need for physical cable connections between safety devices and the control cabinet. This substitution dramatically reduces installation time by removing cable routing and connection tasks, while also simplifying maintenance operations.
Solution Approach 2:
The control unit is designed to perform multiple functions: it receives safety signals wirelessly from various safety devices, processes these signals, and controls the hazardous machine. This multi-functional design consolidates what would traditionally require separate dedicated components, reducing overall system complexity and installation burden while maintaining comprehensive safety coverage.
2Reliability
If traditional safety systems with control cabinets are used, then safety functions can be provided, but the system becomes complicated and costly due to extensive cabling and manual inspections
Solution Approach 1:
The patent replaces the mechanical cabling system with a wireless communication system. Safety units communicate with the control unit via wireless signals, eliminating the need for physical cable connections between safety devices and the control cabinet. This substitution dramatically reduces installation time by removing cable routing and connection tasks, while also simplifying maintenance operations.
Solution Approach 2:
The patent extracts the control functionality from the traditional control cabinet and integrates it directly into the safety units themselves. Each safety unit contains embedded control logic that can independently evaluate safety conditions and trigger machine shutdowns, removing the need for a centralized control cabinet and its associated complex wiring infrastructure.
3Ease of operation
If wireless communication is implemented in safety units, then installation and maintenance are simplified, but new challenges in ensuring reliable and secure wireless safety functions arise
Solution Approach 1:
The patent implements predetermined safety protocols and error handling mechanisms that are built into the wireless communication system before deployment. These include predefined communication protocols, error detection and correction codes, and fallback procedures that automatically activate if wireless communication fails, ensuring that safety functions remain reliable even in the event of communication disruptions.
Data Source
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AI summary
The present invention relates to a programmable safety unit (10) for monitoring and controlling safety functions of an hazardous environment, e.g. comprising hazardous machines and/or processes and/or material or similar and safety equipment associated with said hazardous environment. It is adapted for external mounting, and it comprises a programmable safety module part (20) and a connection part (30), said programmable safety module (20) and said connection part (30) being interconnectable allowing mounting/demounting and replacement of said programmable safety module (20) and/or said connection part (30). The safety unit (10) further comprises at least two connections (211, 212, 311, 312) which are programmable as safe inputs and/or outputs for direct connection to at least a number of the safety functions or equipment of the hazardous environment and e.g. the machines and/or processes.