Optoelectronic Sensor Signature Comparison for Error Recognition
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Solution Overview
Problem
Existing multichannel systems for safety technology face high communication and comparison efforts when processing large data volumes, particularly in 3D sensors, which can lead to inefficient error recognition and increased system resource strain.
Innovation Solution
The implementation of a multichannel optoelectronic sensor that uses signature comparison instead of full data comparison, where signatures are determined from processing results and only these signatures are compared, reducing communication and comparison effort, and allowing for efficient error recognition without straining system resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full data comparison is performed between processing channels, then error recognition capability is improved, but communication effort and system resource load increase significantly
Solution Approach 1:
The patent extracts only the essential error-detecting information from the complete processing results by generating signatures (hash values) that represent the entire data set. Instead of comparing full image data or processing results between channels, only these condensed signatures are transmitted and compared, eliminating unnecessary data transmission while preserving error detection capability.
Solution Approach 2:
The patent transforms the comparison task from operating on large-scale original data to operating on condensed signature parameters. By applying hash functions to generate fixed-length signatures from variable-length processing results, the system changes the parameter representation from detailed data to compact identifiers, dramatically reducing communication overhead.
2Measurement precision
If large data volumes from 3D sensors are processed through multiple channels, then measurement precision and safety are improved, but communication bandwidth and processing resources are overwhelmed
Solution Approach 1:
The patent creates simplified copies (signatures) of the complete processing results that can be transmitted and compared without transmitting the original large data sets. These signature copies contain sufficient information for error detection while consuming minimal communication resources, enabling redundant processing without overwhelming system bandwidth.
3Reliability
If redundant processing channels are implemented for safety compliance, then functional safety is improved, but device complexity and comparison overhead increase
Solution Approach 1:
The patent extracts only the necessary verification information (signatures) from the redundant processing channels rather than requiring full data exchange. This extraction approach maintains the safety benefits of multichannel processing while eliminating the complexity of managing and comparing complete data sets between channels.
Data Source
AI summary
An optoelectronic sensor for detecting objects in a monitored zone is provided having at least one light receiver for generating measurement data from received light from the monitored zone and having a safe evaluation unit that has at least two processing channels for a redundant processing of the measurement data and having a comparison unit for comparing processing results of the processing channels to uncover errors in a processing channel 30a-b. The processing channels are here each configured for a determination of a signature with respect to their processing results; and the comparator unit is configured for a comparison of the signatures.