Valve Positioner Diagnostics Using G-Force and Position Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems lack continuous monitoring of sudden valve part movements, fluid dynamics changes, and valve internal damages, as well as the ability to predict issues related to valve internals and process fluid parameters.
Innovation Solution
A control valve diagnostics system featuring a smart valve positioner with an inbuilt accelerometer to continuously capture 'g-force' values and a non-contact position sensor for measuring valve position against maximum 'g-force', enabling detection of valve internal damages and prediction of issues through data analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional valve positioners are used without continuous monitoring, then device complexity is reduced, but reliability of valve operation deteriorates due to undetected internal damages
Solution Approach 1:
The accelerometer and position sensor are integrated within the existing valve positioner housing, nesting the diagnostic functions inside the current device structure. This eliminates the need for separate external monitoring equipment while providing continuous vibration and position data for reliability assessment.
Solution Approach 2:
The valve positioner performs self-diagnostics by continuously monitoring its own operational parameters (vibration via accelerometer, position via non-contact sensor) and comparing them against expected patterns. The system automatically detects anomalies indicating internal damage without requiring external diagnostic equipment.
2Measurement precision
If continuous monitoring of valve movements is implemented, then detection precision of internal damages is improved, but energy consumption increases
Solution Approach 1:
The accelerometer and position sensor operate continuously throughout valve operation, capturing every vibration event and position change. This continuous data stream enables precise detection of internal damages by analyzing patterns in real-time without gaps that could miss critical events.
Solution Approach 2:
Non-contact position sensing technology replaces traditional mechanical position sensors that require physical contact and higher power for actuation. The non-contact method uses optical or electromagnetic fields to measure valve position, significantly reducing energy consumption while maintaining high measurement precision.
3Manufacturing precision
If maximum g-force analysis is performed at each valve position, then manufacturing precision of valve assembly is improved, but device complexity increases due to additional sensors and processing
Solution Approach 1:
The accelerometer serves multiple functions: it monitors overall vibration levels for general health assessment, identifies maximum g-force events for precision analysis, and detects abnormal vibration patterns indicating internal damage. This single sensor performs what would otherwise require multiple specialized measurement devices.
Solution Approach 2:
The valve positioner acts as an intermediary device that houses both the accelerometer and non-contact position sensor, coordinating their data collection and processing. This centralized positioner integrates the diagnostic functions without requiring separate complex systems, simplifying the overall device architecture while enabling precise g-force analysis at each position.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively monitors sudden valve movements and fluid dynamics changes, detects internal damages, and predicts potential issues, enhancing the prevention and diagnosis of valve-related problems.
Implementation Method 1
The control valve diagnostics system comprises of a smart valve positioner pre-installed with a non-contact position sensor for valve position measurement against maximum 'g-force' for each a time period of 5-20 milli seconds. The said control valve diagnostics system which can capture the 'g-force' continuously through inbuilt accelerometer.
Implementation Method 2
smart valve positioner pre-installed with a non-contact position sensor for valve position measurement
Data Source
AI summary
The present invention discloses a control valve diagnostics system (100) which comprises of a smart valve positioner (101) having an inbuilt accelerometer (101a), inbuilt non-contact position sensor (101b), an actuator (102), a power source (103), and the non-volatile memory (104). The smart valve positioner (101) is pre-installed with a non-contact position sensor for valve position measurement against maximum ‘g-force’ for a time interval of 5-20 milli seconds. The system (100) captures the ‘g-force’ continuously through inbuilt accelerometer (101a), where the system is powered by 2-wire 4-20 mA loop power or 2-wire fieldbus/profibus (103). The valve position at maximum ‘g-force’ value can be derived by comparing the previous and current ‘g-value’, and the generated data is saved in the non-volatile memory (104).