Scanner Dynamic Evaluation Adjusts Detection Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Scanners used to monitor protected fields often experience false positive object detection signals due to small particles or environmental disturbances, leading to reduced availability and increased response times, which can compromise safety.
Innovation Solution
A method that determines the frequency of occurrence of received signals and adjusts the degree of detection safety accordingly, dynamically adapting the number of multiple evaluations and angular resolution to differentiate between critical and non-critical objects, thereby optimizing scanner operation under varying environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple evaluation is used to filter false positives from small particles, then reliability is improved, but response time increases
Solution Approach 1:
The patent implements dynamic adjustment of the number of multiple evaluations based on detected environmental conditions. When particles or disturbances are detected, the system increases the number of evaluation cycles to filter false positives. When conditions are clear, it reduces evaluations to minimize response time. This dynamic adaptation resolves the contradiction by making the evaluation intensity variable rather than fixed.
Solution Approach 2:
The system changes the parameter of evaluation cycle count based on environmental conditions. By monitoring for particles and disturbances, the system adjusts the number of scanning cycles required before triggering an object detection signal. This parameter change allows the system to optimize between reliability and response time according to actual operating conditions.
2Loss of time
If the monitored protected field is increased to detect objects earlier, then response time is improved, but the probability of false positive shutdowns increases
Solution Approach 1:
The patent dynamically adjusts the monitored field size based on environmental conditions. When particles or disturbances are present, the system reduces the monitored field extent to minimize false positives. When conditions are clear, it expands the monitored field to enable earlier object detection. This dynamic adjustment resolves the contradiction between early detection and false positive reduction.
Solution Approach 2:
The system changes the spatial parameter of the monitored field based on detected environmental conditions. By adjusting the field boundaries dynamically, the system optimizes the trade-off between detection time and false positive rate according to actual operating conditions.
3Reliability
If the number of multiple evaluations is increased to improve robustness against particles, then reliability is improved, but productivity decreases
Solution Approach 1:
The patent implements dynamic adjustment of the number of multiple evaluations based on environmental conditions. When particles or disturbances are detected, the system increases evaluations to maintain robustness. When conditions are clear, it reduces evaluations to maximize machine availability and productivity. This dynamic approach resolves the contradiction between robustness and productivity.
Solution Approach 2:
The system changes the evaluation cycle count parameter based on environmental monitoring. This parameter adjustment allows the system to optimize between robustness against disturbances and machine availability according to actual operating conditions.
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
This approach enhances the scanner's robustness and availability by reducing false positives and adjusting response times based on environmental conditions, ensuring reliable object detection while maintaining safety and operational efficiency.
Implementation Method 1
A transmitted light beam generated by a light transmitter, e.g. by a laser or the like, is directed via a light deflection unit into the protected field to be monitored and is reflected or remitted there by an object that may be present. The reflected or remitted light moves back to the scanner again and is detected by the light receiver there.
Data Source
AI summary
The present invention relates to a method of operating a scanner for monitoring an least two-dimensional protected field that is divided into a plurality of cyclically scannable monitored fields, wherein the scanner comprises at least one light transmitter and at least one light receiver. The invention further relates to a scanner for monitoring an at least two-dimensional protected field.