Dual-Channel Machine Operation Authentication Against Unauthorized Control
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Solution Overview
Problem
In machine operation systems using general-purpose information terminals, the separation of the terminal and its base member with a safety switch can lead to unauthorized operation, compromising safety, and existing solutions are costly.
Innovation Solution
A machine operation system incorporating a wireless operation device connected via wireless communication and a wired operation device connected via wired communication, with an authentication unit enabling operation only when both devices are simultaneously or in a predetermined order, ensuring secure operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a general-purpose information terminal is used for machine operation, then cost is reduced and versatility is improved, but safety cannot be secured when the terminal and base member are separated
Solution Approach 1:
The operation device is divided into two separate components: a wireless operation device (general-purpose terminal) and a wired base member with safety switches. This segmentation allows the terminal to be cost-effective and versatile while the base member maintains safety functions through wired connection to the control device.
Solution Approach 2:
An authentication unit acts as an intermediary between the wireless operation device and the control device. It verifies whether the terminal is properly attached to the base member by checking authentication information, allowing operation only when both components are connected, thus ensuring safety without requiring constant physical attachment.
2Ease of operation
If the terminal and base member are removably attached, then ease of operation is improved, but unauthorized operation becomes possible
Solution Approach 1:
The system dynamically adjusts its operational state based on the attachment status. When the terminal is attached to the base member, the authentication unit enables operation commands. When separated, operation is automatically disabled. This dynamic response allows easy attachment/detachment while preventing unauthorized operation.
Solution Approach 2:
The authentication unit continuously monitors the attachment status between the terminal and base member by verifying authentication information. This feedback mechanism ensures that operation commands are only transmitted to the control device when proper attachment is detected, preventing unauthorized use while maintaining ease of operation when attached.
3Reliability
If wired communication is used for the base member, then safety is secured, but device complexity increases
Solution Approach 1:
The system segments communication pathways: the base member uses wired communication with the control device for safety-critical signals, while the terminal uses wireless communication for user interaction. This segmentation isolates the complexity of wired safety systems to only the necessary components.
Solution Approach 2:
The authentication unit serves as an intermediary that manages the complexity of coordinating between wired and wireless systems. It handles the authentication logic and communication coordination, simplifying the overall system architecture by centralizing the integration complexity in a single component.
Data Source
AI summary
This machine operation system includes: a wireless operation device that is connected via wireless communication with a control device of a robot or an industrial machine, and that issues a command, in accordance with operation content, to the control device to move the robot or the industrial machine; a wired operation device that is connected via wired communication with the control device, and that transmits a signal to the control device in accordance with the operation content; and an authentication unit that enables the operation content for the wireless operation device if a first operation for the wired operation device and a second operation for the wireless operation device are executed simultaneously or in a predetermined order.