Safety Sensor Reference Contour for Automated Protective Field Monitoring
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Solution Overview
Problem
Conventional monitoring devices for hazardous areas require manual reconfiguration of protective fields, which is cumbersome and time-consuming, especially when multiple fields need adjustment.
Innovation Solution
A monitoring device with a safety sensor that determines a reference contour during a teach-in process, using measured values to automatically check and correct protective fields, eliminating the need for manual verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual verification of protective fields is performed, then configuration accuracy is improved, but time consumption and operational complexity increase
Solution Approach 1:
The system performs self-verification by automatically comparing measured values against the reference contour during operation. The control device autonomously determines whether objects are within protective fields without requiring manual operator verification, thus eliminating time-consuming manual checks while maintaining configuration accuracy through automated plausibility checks.
Solution Approach 2:
The system continuously feeds back measured values from the safety sensor to the control device, which automatically compares these measurements with the stored reference contour. This closed-loop feedback mechanism enables real-time verification of protective field configurations without manual intervention, resolving the contradiction between accuracy and time consumption.
2Area of stationary object
If multiple protective fields are configured, then monitoring coverage is improved, but operational complexity increases
Solution Approach 1:
The control device is designed with multi-functionality to automatically manage multiple protective fields simultaneously. It can store multiple reference contours, process measurements from multiple zones, and independently evaluate each protective field configuration, thereby providing comprehensive monitoring coverage without increasing operational complexity for the user.
Solution Approach 2:
The system automatically performs plausibility checks for all configured protective fields without requiring operator intervention. The control device autonomously manages the complexity of multiple field configurations by continuously comparing measured values against all stored reference contours and triggering appropriate safety functions, making multi-field monitoring as easy as single-field monitoring.
3Productivity
If automated reference contour checking is implemented, then operational efficiency is improved, but system complexity increases
Solution Approach 1:
The reference contour is determined in advance during a teach-in process before normal operation begins. By pre-configuring the reference data during installation, the system eliminates the need for complex real-time calculations during operation, thereby improving operational efficiency while containing system complexity to the initial setup phase rather than ongoing operations.
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
Automated protective field adjustment ensures accurate and efficient monitoring without operator intervention, enhancing safety and reducing time and labor in configuring protective fields.
Implementation Method 1
an optical sensor, which is designed, for example, as a scanning sensor in such a way that a monitored area is periodically scanned using the light beams of a transmitting/receiving unit of this optical sensor
Implementation Method 2
which can advantageously be used to perform distance measurements using a pulse-time-of-flight method or a phase measurement method
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a monitoring device (1) with a safety sensor (4) designed for protective field monitoring. The safety sensor (4) determines the positions of objects in a monitoring area (5). In a teach-in process, a reference contour (21) is determined in the safety sensor (4) based on the positions of non-safety-critical objects detected by the safety sensor (4). This reference contour is continuously checked for plausibility using measured values detected by the safety sensor (4). The reference contour (21) is used to monitor configured protective fields (6).