Valve Positioner Orientation Sensing for Accurate Shut-Off Modes
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Solution Overview
Problem
Process control valves often experience disruptions due to orientation issues and calibration problems, leading to inefficiencies and increased maintenance costs in industrial operations.
Innovation Solution
A valve positioner system that includes an actuator, position sensor, and measurement unit to correct for orientation and ensure accurate operation modes, using data from sensors like accelerometers and magnetic flux sensors to maintain proper display orientation and prevent damage from improper closure member positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the valve positioner is installed in different orientations, then the valve can be mounted in various positions, but the display orientation and operational modes become incorrect
Solution Approach 1:
The patent replaces mechanical orientation adjustment mechanisms with electronic sensors (accelerometers, magnetometers) and software-based correction. The system automatically detects the valve positioner's physical orientation through sensor data and digitally corrects the display and operational modes through coordinate transformations, eliminating the need for manual mechanical adjustment.
Solution Approach 2:
The system changes the orientation parameters (roll, pitch, yaw angles) detected by sensors and applies corresponding transformation matrices to correct the display and operational modes. By dynamically adjusting these parameters based on sensor input, the system maintains correct operation regardless of physical mounting orientation.
2Device complexity
If the valve positioner orientation is not corrected, then the system structure remains simple, but calibration problems and operational disruptions occur
Solution Approach 1:
The valve positioner system performs self-calibration and self-correction using onboard sensors (accelerometers, magnetometers) and processing units. The system automatically detects its own orientation, calculates correction parameters, and adjusts display and operational modes without external intervention, maintaining reliability while adding minimal complexity.
Solution Approach 2:
The system continuously monitors orientation through sensors and uses feedback loops to automatically adjust display orientation and operational modes. The feedback mechanism compares sensor data with expected orientations and applies real-time corrections, ensuring reliable operation without requiring complex manual calibration procedures.
3Measurement precision
If manual calibration is performed for each mounting orientation, then accurate operation can be achieved, but maintenance time and costs increase
Solution Approach 1:
The system pre-calculates and stores transformation matrices for multiple standard mounting orientations (0°, 90°, 180°, 270°). When installed, the system automatically selects the appropriate pre-computed transformation based on sensor detection, eliminating the need for time-consuming manual calibration while maintaining high measurement precision.
Solution Approach 2:
The patent replaces manual calibration procedures with automated sensor-based detection and software correction. Accelerometers and magnetometers automatically determine the mounting orientation, and the system applies corresponding digital transformations to ensure accurate operation modes, reducing maintenance time from manual calibration to automatic self-correction.
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
Enhances operational reliability and simplifies maintenance by ensuring accurate data display and mode initiation, reducing downtime and maintenance costs through improved orientation correction and prevention of wear and tear.
Implementation Method 1
an accelerometer to measure an orientation of the valve positioner relative to a vertical reference on the Earth
Implementation Method 2
a magnetic flux sensor to measure an orientation of the valve positioner
Data Source
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AI summary
A valve positioner (100) for use on a process control valve (102) or "valve assembly." The process control valve (102) may include a pneumatic actuator (104) and a valve (106) having a closure member (110) coupled with the pneumatic actuator (104) and moveable relative to a seat (112). The valve positioner (100) may couple with the pneumatic actuator (104) to provide a pneumatic signal to set a position of the closure member (110) relative to the seat (112). An accelerometer (128) may couple with the valve positioner (100). The accelerometer (128) may generate data in response to orientation of the valve positioner (100). In one implementation, the configurations can use this data to ensure proper visualization of data on a display (124). The data also permits the device to properly manage operating modes, like tight shut-off or fully-opened mode, that may prevail due to orientation issues that cause defects in a measured position for a closure member (110) that regulates flow of material through the valve assembly (102).