Touchscreen Operator Attentiveness Verification for X-Ray Systems
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Solution Overview
Problem
Existing safety devices for operators of systems like X-ray inspection systems primarily check physical presence but fail to ensure attentiveness, as they can become routine and be actuated unknowingly, lacking a means to verify the operator's alertness and attention.
Innovation Solution
A method and device that utilize a touch-sensitive screen to require operators to consciously and attentively input randomly generated information within a time frame, ensuring that actuation is not subconscious, by displaying a target location on the screen and evaluating the operator's reaction speed and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple safety device like a deadman's switch is used, then the device complexity is low and ease of operation is high, but the ability to verify operator attentiveness deteriorates
Solution Approach 1:
The patent combines the display unit and input unit into a single touchscreen interface, merging multiple functions (information display, input reception, touch detection) into one integrated device. This reduces overall system complexity while maintaining the ability to verify operator attentiveness through interactive tasks.
Solution Approach 2:
The touchscreen serves multiple functions: displaying operational information, presenting attention verification tasks, detecting operator input through touch, and providing feedback. This multi-functionality allows the safety device to verify attentiveness without requiring separate dedicated components for each function.
2Reliability
If a routine safety activation procedure is used, then the ease of operation is high, but the verification of actual operator attention deteriorates
Solution Approach 1:
The patent implements dynamic task parameters where the target position, task type, and time limits vary between activations. This prevents operators from developing fixed routines while maintaining ease of operation through the intuitive touchscreen interface and clear visual feedback.
Solution Approach 2:
The system provides immediate visual feedback on the touchscreen when the operator completes an attention verification task, showing whether the response was correct and providing time information. This feedback mechanism maintains ease of operation by clearly guiding the operator while reliably verifying attention.
3Reliability
If random information input is required for safety device actuation, then the verification of operator attention is improved, but the ease of operation deteriorates
Solution Approach 1:
The display unit presents the random information and target position to the operator before requiring the input action. This preliminary presentation allows the operator to process the information and prepare their response, maintaining ease of operation despite the random nature of the task.
Solution Approach 2:
The patent replaces traditional mechanical safety device activation (physical presence verification only) with an electronic touchscreen-based system that incorporates cognitive tasks. This substitution enables attention verification while maintaining ease of operation through the familiar touchscreen interface.
4Reliability
If a touch-sensitive screen with random information display is used, then the operator attentiveness verification is improved, but the device complexity increases
Solution Approach 1:
The patent combines the display unit and input unit into a single touchscreen interface, merging multiple functions (information display, input reception, touch detection) into one integrated device. This reduces overall system complexity while maintaining the ability to verify operator attentiveness through interactive tasks.
Data Source
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AI summary
The invention relates to a method and to corresponding devices for monitoring the attentiveness of an operating person of an X-ray inspection system for nondestructively inspecting inspection objects and for ensuring the presence and/or attentiveness of an operator of the X-ray inspection system, said method comprising the following steps: displaying information that defines a randomly determined desired input; capturing an actual input of the operating person as a response to the displayed desired input; and determining a signal indicating the attentiveness of the operating person on the basis of the desired input and the actual input.