Safety Valve Controller for Intermediate Flow Modulation
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Solution Overview
Problem
Process control systems face challenges in maintaining diagnostic capabilities and efficiently adjusting fluid flow settings in fluid flow control assemblies, particularly in transitioning between fully open and fully closed states, which can lead to reduced efficiency and increased difficulty in adjusting positions.
Innovation Solution
A safety valve controller with comparator circuitry compares current measurements to thresholds to determine drive signals for fluid flow control assemblies, allowing for modulation between flow settings and maintaining diagnostic capabilities without shutting off power, thus enabling intermediate flow settings and precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the fluid flow control assembly transitions between fully open and fully closed states, then the flow setting is adjusted, but the difficulty in adjusting positions increases and operational efficiency is reduced
Solution Approach 1:
The patent implements a dynamic control system that continuously modulates the fluid flow control assembly between fully open and fully closed states based on real-time current measurements and threshold comparisons, rather than relying on static positional adjustments. This dynamic approach allows the system to efficiently transition between states without mechanical friction or positioning difficulty
Solution Approach 2:
The patent replaces mechanical positioning mechanisms with an electrical control system using comparator circuitry and drive signals. Instead of manually adjusting mechanical components between open and closed positions, the system uses electrical signals to actuate the control assembly, eliminating mechanical friction and positioning difficulty while maintaining diagnostic capabilities through continuous monitoring
2Reliability
If power is shut off to maintain diagnostic capabilities, then diagnostics are preserved, but the ability to adjust intermediate flow settings is lost
Solution Approach 1:
The patent implements a multi-functional control system that simultaneously performs diagnostic monitoring and flow modulation functions. The comparator circuitry and controller execute both diagnostic routines to monitor system health and generate drive signals to modulate flow settings, eliminating the need to choose between diagnostics and adaptability
Solution Approach 2:
The patent maintains continuous power supply to enable uninterrupted diagnostic monitoring while simultaneously allowing flow modulation. The system continuously executes diagnostic routines and compares current measurements against thresholds without shutting off power, ensuring both diagnostic reliability and the ability to adjust intermediate flow settings are maintained at all times
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 solution allows for efficient adjustment of fluid flow control assemblies, maintaining diagnostic capabilities and reducing the difficulty in transitioning between flow settings, thereby enhancing the operational efficiency and safety of process control systems.
Implementation Method 1
comparator circuitry to compare a current measurement to at least one of a first threshold associated with a first flow setting
Data Source
AI summary
Methods and apparatus to adjust operation of a fluid flow control assembly are disclosed. An example safety valve controller apparatus includes comparator circuitry to compare a current measurement to at least one of a first threshold associated with a first flow setting of a fluid flow control assembly or a second threshold associated with a second flow setting of the fluid flow control assembly, and determine a first drive signal associated with the first flow setting or a second drive signal associated with the second flow setting in response to satisfying a respective one of the first or second thresholds, and current modulating circuitry to determine a third drive signal based on the current measurement, the third drive signal to modulate the flow setting of the fluid flow control assembly between the first and second flow settings.