Servo Motor Safety Trace Overlay for Spec Compliance Checks
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Solution Overview
Problem
Users cannot immediately determine whether safety function specifications are satisfied by analyzing the tracing data of servo motor operations, as existing data tracing functions only output results without clear indications of compliance with safety standards.
Innovation Solution
A control system comprising a first controller, a drive device, a second controller for safety functions, and a data tracing module, where the drive device stores safety parameters and stops motor operation based on state values and safety parameters, with a support device displaying safety parameters superimposed on tracing results to facilitate easy determination of compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If data tracing function outputs only raw tracing data, then data accuracy is maintained, but ease of operation deteriorates because users cannot immediately determine whether safety function specifications are satisfied
Solution Approach 1:
The patent introduces a support device as an intermediary between the data tracing function and the user. This support device acquires both the tracing data and safety parameters, processes them together, and presents a combined view that shows whether state values satisfy safety specifications. The intermediary performs the complex comparison work automatically, making safety verification immediate and intuitive without compromising the accuracy of the underlying data.
2Device complexity
If safety parameters are displayed separately from tracing results, then device complexity is reduced, but loss of information increases because the relationship between state values and safety limits is not immediately apparent
Solution Approach 1:
The patent merges the display of safety parameters with the display of tracing results in a unified graphical interface. Both types of information are superimposed on the same graph, allowing users to visually compare state values against safety limits without switching between separate displays. This combining preserves complete information about compliance status while maintaining relative system simplicity through a single integrated view.
3Measurement precision
If detailed safety parameters are always displayed, then measurement precision is improved, but device complexity increases due to the need for additional processing and display capabilities
Solution Approach 1:
The patent applies local quality by providing detailed safety parameter information specifically at the locations in the graphical display where it is most needed for verification. The safety parameters are superimposed on the tracing result graph at relevant points, allowing detailed information to be presented locally where it aids verification, rather than requiring a completely complex system-wide overhaul. This targeted approach improves verification accuracy with minimal additional complexity.
Data Source
AI summary
Provided is a control system that outputs determination information on whether or not safety function specifications are satisfied. The control system includes: first and second controllers (100, 200); a drive device (300); and a data tracing module (154) that traces a state value indicating an operation state of a motor (400). The drive device (300) includes: a storage for storing safety parameters related to safety functions; and a control device (311) that stops driving of the motor (400) on the basis of the safety parameters and the state value indicating the operation state of the motor (400). The control system further includes: a support device (500) that displays the safety parameters while overlapping a tracing result of the state value obtained by the data tracing module (154).