Remote I/O Module Position Offset Correction
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Solution Overview
Problem
Industrial control systems for moving frames, such as conveyor belts, face complexity in synchronizing sensors and actuators due to the need for frequent adjustments of offset variables, which complicates the control program and requires manual review and changes.
Innovation Solution
An I/O module that receives and transmits actual position values corrected for spatial offsets, allowing these calculations to be performed remotely and eliminating the need for position corrections in the control program, enabling simultaneous broadcasting of frame-referenced positions to multiple devices and automatic or semi-automatic calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If offset variables are defined in the control program to represent spatial offsets of control devices, then the control system can synchronize sensors and actuators with the moving frame, but the control program becomes complex and requires manual review and changes when adjustments are needed
Solution Approach 1:
The patent extracts the offset compensation functionality from the central control program and relocates it to the I/O modules themselves. Each I/O module now contains its own offset variable and performs local position value correction, eliminating the need for complex centralized offset management while maintaining synchronization accuracy.
Solution Approach 2:
The patent segments the offset compensation task into individual I/O module responsibilities. Instead of one centralized control program managing all offsets, each I/O module independently handles its own offset corrections, simplifying the overall system architecture and reducing control program complexity.
2Measurement precision
If position corrections are performed in the control program, then spatial offsets can be compensated, but adjustments require manual review and changes to the control program
Solution Approach 1:
The patent enables I/O modules to perform self-service by automatically applying their own offset corrections to position values. The modules independently manage their offset variables without requiring manual intervention in the control program, making adjustments easier while maintaining position accuracy.
Solution Approach 2:
The patent implements preliminary action by pre-configuring offset variables in each I/O module before operation. These offset values are established in advance and automatically applied during normal operation, eliminating the need for manual control program modifications when adjustments are needed.
3Adaptability or versatility
If multiple devices receive position data from the control program, then coordination across the system is achieved, but position corrections must be applied centrally increasing system complexity
Solution Approach 1:
The patent segments the position correction function so that each receiving device performs its own corrections locally rather than relying on centralized processing. This distributed approach maintains system coordination while reducing centralized control complexity.
Solution Approach 2:
The patent uses the I/O modules as intermediaries that receive raw position data from the control program, apply their local offset corrections, and then use the corrected values for device coordination. This intermediary approach distributes the correction workload and simplifies the control program.
Data Source
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AI summary
An industrial control system provides for distributed processing of position related signals by remote I/O modules to correct for spatial offsets of sensors or actuators associated with the I/O modules, the latter which may receive position data and may correct timing signals detected at the I/O modules according to a stored position offset within the I/O modules.