Steam Controller State Monitoring for Early Equipment Abnormality Detection
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Solution Overview
Problem
Conventional methods for monitoring steam-using facilities detect abnormalities only after they have occurred, leading to inconvenient equipment stoppages and significant operational losses, as they focus on the steam-using equipment rather than the steam controllers that precede these issues.
Innovation Solution
A steam-using facility monitoring system that includes a control state detector for the steam controller and an operational state estimating means to sense abnormalities in the steam controller, allowing for early detection of potential issues in the steam-using equipment by monitoring the steam controller's state and combining detection signals from various detectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional monitoring methods are used to detect abnormalities in steam-using equipment, then abnormality detection is achieved, but equipment stoppage and operational loss occur because abnormalities are detected only after they have already occurred
Solution Approach 1:
The patent applies preliminary action by monitoring the steam controller's state (opening degree, valve position) in advance to predict abnormalities in the steam-using equipment before they occur. The operational state estimation unit calculates suitability indices based on control signals, enabling early detection of potential issues such as excessive opening degrees that may lead to equipment failure, thus allowing preventive maintenance without stopping operation.
Solution Approach 2:
The patent inverts the conventional monitoring approach by not directly monitoring the steam-using equipment's operational parameters (rotation speed, temperature, pressure), but instead monitoring the steam controller's state and inferring equipment condition from control actions. This indirect monitoring method enables earlier abnormality detection by observing control compensations before equipment parameters deviate abnormally.
2Measurement precision
If monitoring focuses on steam-using equipment operational parameters, then equipment state is tracked, but abnormalities are detected too late to prevent failure
Solution Approach 1:
The system performs preliminary detection by analyzing the steam controller's opening degree and valve position, which change in advance of actual equipment abnormalities. The operational state estimation unit calculates suitability indices that predict equipment issues before they manifest in operational parameters, providing early warning time without sacrificing monitoring precision.
Solution Approach 2:
The steam controller serves as an intermediary indicator of equipment health. Instead of directly measuring equipment parameters, the system monitors the controller's state as a mediator that reflects upcoming equipment issues. The control signal analysis acts as an intermediate step that bridges controller behavior and equipment condition, enabling earlier detection.
3Productivity
If steam controller state is monitored to enable early abnormality detection, then operational continuity is improved, but system complexity increases due to additional detection and estimation components
Solution Approach 1:
The operational state estimation unit serves multiple functions: it calculates suitability indices for equipment operation, detects potential abnormalities, and provides early warnings. The control signal input unit processes various controller states (opening degree, valve position) through a unified estimation algorithm, enabling multi-functional operation without proportionally increasing system complexity.
Solution Approach 2:
The system implements feedback by continuously monitoring the steam controller's state and comparing it against predetermined thresholds and patterns. The operational state estimation unit provides feedback on equipment suitability, enabling continuous adjustment and early detection of deviations. This feedback mechanism maintains operational continuity through automated monitoring without requiring complex manual intervention systems.
Data Source
AI summary
Suitability of an operational state of a steam-using equipment is accurately estimated to allow for early detection of a sign of abnormality in the steam-using equipment. A steam-using facility monitoring system (M) comprised of a steam-using equipment (4) includes a control state detector (D1) that detects a state of a steam controller (1) provided in a steam pipe (2) accompanying the steam-using equipment (4), and an operational state estimating means (S) having a signal input unit (S1) that inputs a detection signal (σi) from the control state detector (D1) and an operational state estimation unit (S2) that estimates the operational state of the steam-using equipment (4) based on one inputted detection signal (σi) or a preset particular combination of detection signals (σi).