Safety Control System Fixed-Cycle Data Aggregation

Solution Overview

Problem

In safety control systems integrated with distributed control systems, existing safety communication methods require users to formulate binding variables and function blocks, leading to increased engineering complexity, high CPU usage, and excessive alarms due to individual data transmission and diagnosis.

Innovation Solution

A safety control system utilizing link transmission communication means on a control bus for fixed-cycle data sharing among safety control stations, with a safety layer for generating and diagnosing safety information, including CRC codes, allowing for efficient data transfer and reduced CPU load with targeted alarms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If individual data transmission and diagnosis methods are used in safety control systems, then communication safety can be ensured, but engineering complexity increases and CPU usage becomes excessively high

Engineering Contradiction:

Improvecommunication safetyVSAvoidengineering complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple individual data transmissions into a single aggregated data structure called a data set. Instead of transmitting and diagnosing each safety parameter separately, multiple parameters are merged into one composite message that is transmitted and diagnosed as a single unit, thereby reducing engineering complexity while maintaining safety

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a universal data transmission framework that can handle multiple different safety parameters through a single standardized interface. The data set structure and diagnosis mechanism work universally for all safety parameters without requiring separate customization for each parameter, reducing both engineering complexity and CPU overhead

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If individual data transmission and diagnosis methods are used in safety control systems, then communication safety can be ensured, but CPU usage becomes excessively high

Engineering Contradiction:

Improvecommunication safetyVSAvoidCPU usage

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent combines multiple individual data transmissions into a single aggregated data structure called a data set. Instead of transmitting and diagnosing each safety parameter separately, multiple parameters are merged into one composite message that is transmitted and diagnosed as a single unit, thereby reducing engineering complexity while maintaining safety

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements selective diagnosis where the system performs comprehensive diagnosis only on the aggregated data set level, rather than performing full diagnosis on each individual parameter. This partial action approach maintains safety by diagnosing the overall data integrity while avoiding the excessive CPU usage that would result from diagnosing every single parameter individually

Inventive Principle:

Principle #16Partial or excessive action

3Measurement precision

If individual data transmission is used in safety control systems, then detailed error detection is possible, but excessive alarms are generated

Engineering Contradiction:

Improveerror detection precisionVSAvoidexcessive alarms

Core Design Contradiction:

Measurement precisionVSObject-generated harmful factors

Solution Approach 1:

The patent combines multiple individual data transmissions into a single aggregated data structure called a data set. Instead of transmitting and diagnosing each safety parameter separately, multiple parameters are merged into one composite message that is transmitted and diagnosed as a single unit, thereby reducing engineering complexity while maintaining safety

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent introduces an intermediary data set structure that sits between individual parameters and the final alarm output. This data set acts as a mediator that aggregates multiple parameters and provides a single diagnosis result, preventing the propagation of excessive individual alarms while maintaining precise error detection at the aggregation level

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS7912563B2Safety control system

Publication Date: 2011.03.22 YOKOGAWA ELECTRIC CORP

AI summary

A safety control system includes a plurality of safety control stations connected to a control bus to communicate with each other and with a distributed control system including a plurality of control stations connected to the control bus, wherein each of the plurality of safety control stations has an interface through which each of the plurality of safety control stations is connected to the control bus for transmitting own data of each of the plurality of safety control stations to all other safety control stations by broadcasting at a fixed cycle via the control bus and for receiving by each safety control station transmitted data from all other safety control stations, and wherein the interface implements a safety layer used to generate and diagnose safety information.