Monitoring Sensor Functional Testing via Contour and Field Objects
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Solution Overview
Problem
Existing monitoring systems for protective fields, such as those used in driver-less transport systems and machine safety, require a cost-effective and simple method to test the functional capability of monitoring sensors, ensuring high safety standards are met.
Innovation Solution
A test method involving the use of contour and field test objects outside the monitored area, with known positions, to define scan fields and generate output signals based on their detection, allowing for the evaluation of sensor operability and reliability by switching between different field sets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a test method using test objects and field sets is implemented, then the reliability of monitoring sensor testing is improved, but the device complexity increases
Solution Approach 1:
The patent uses test objects (contour test objects and field test objects) as simplified copies or representations of actual objects that would be monitored. These test objects replicate the optical properties (reflection, remission) of real objects without requiring complex actual object setups, enabling reliable functional testing while maintaining simplicity.
Solution Approach 2:
The monitoring area is segmented into multiple scan fields (first scan field, second scan field) and test objects are positioned in specific regions (first region, second region). This segmentation allows independent testing of different sensor functions and facilitates systematic validation of the monitoring system's operational reliability.
2Reliability
If multiple field sets with different scan field assignments are used, then the comprehensiveness of sensor operability evaluation is improved, but the ease of operation deteriorates
Solution Approach 1:
The patent employs periodic switching between first and second field sets to systematically evaluate sensor operability from different perspectives. This periodic alternation ensures comprehensive coverage of all sensor functions while maintaining a predictable, repeatable testing sequence that simplifies operational procedures.
Solution Approach 2:
The scan fields and test object positions are pre-configured in multiple field sets before testing begins. This preliminary arrangement of test parameters and field assignments eliminates the need for complex real-time adjustments during testing, making the switching between different evaluation modes straightforward and operationally simple.
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
Ensures the correct operability of monitoring sensors by generating specific output signals based on the detection of test objects, providing a reliable and cost-effective means to maintain high safety standards in monitoring systems.
Implementation Method 1
light which is, where applicable, reflected or remitted by an object present in the protective field being detected by a receiver
Implementation Method 2
light which is, where applicable, reflected or remitted by an object present in the protective field being detected by a receiver
Implementation Method 3
light of a light source being transmitted via a light deflection unit into a protective field to be monitored
Data Source
AI summary
The invention relates to a test method for the testing of the functional capability of a monitoring sensor which scans a protective field to be monitored using a scanner. In accordance with the invention, at least one contour test object and one field test object are provided outside the protective field to be monitored. A field set is defined having at least two scan fields, with the first scan field of the first field set comprising the protective field to be monitored and at least one contour test object and the second scan field of the first field set comprising at least the region of the field test object. In a first test sequence, the protective field to be monitored is scanned with the first field set, with a positive first output signal only being generated when the contour test object is detected in the expected position in the first scan field and with a negative second output signal being generated when the field test object is detected in the second scan field of the first field set. A second field set having reversed parameters is defined and scanned in a second test sequence. The correct operability of the sensor is only assumed if, after a change to the first test sequence, a positive first output signal and a negative second output signal are found or, after a change to the second test sequence, a positive second output signal and a negative first output signal are found.