Wireless Valve Element Monitoring in Process Control Systems
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Solution Overview
Problem
Valve failures in process control systems are difficult to detect and predict due to the lack of intelligent valve positioners in many facilities, which rely on simple current-to-pressure converters or 4-20 mA based positioners, leading to disruptions in plant operations.
Innovation Solution
A system and method utilizing wireless valve elements and transceivers to communicate valve status and performance data to a process control system, enabling real-time monitoring and control, similar to intelligent positioners, but with increased flexibility, lower cost, and reduced risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If simple current-to-pressure converters or 4-20 mA based positioners are used, then device complexity is reduced and cost is lowered, but valve failure detection capability deteriorates
Solution Approach 1:
The patent implements feedback by having the wireless valve element continuously transmit operational data (position, torque, temperature, etc.) back to the process control system. This feedback mechanism enables real-time monitoring of valve health parameters, allowing the system to detect anomalies and predict failures before they occur, thus resolving the contradiction between simplicity and detectability.
Solution Approach 2:
The patent introduces a wireless communication intermediary (transceiver system) between the valve element and the control system. This intermediary enables data transmission without complex hardwired connections, maintaining device simplicity while enabling comprehensive monitoring capabilities through the wireless data channel.
2Difficulty of detecting and measuring
If intelligent valve positioners are implemented, then valve failure detection capability is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical/wired positioning systems with a wireless electronic communication system. The wireless transceiver eliminates the need for complex physical connections while providing enhanced monitoring capabilities, thus reducing mechanical complexity while improving detection ability.
Solution Approach 2:
The wireless valve element serves multiple functions: it acts as both a traditional valve actuator and an intelligent monitoring device. By integrating sensors and wireless communication into the valve element itself, the system achieves comprehensive functionality without adding separate complex positioning hardware.
3Loss of information
If wireless valve elements with transceivers are used, then valve monitoring capability is improved, but use of energy increases
Solution Approach 1:
The wireless communication system operates periodically rather than continuously, transmitting valve status data at predetermined intervals. This periodic operation significantly reduces energy consumption compared to continuous transmission while still providing timely failure detection and comprehensive monitoring capability.
Data Source
AI summary
A process control system includes at least one controller and at least one wireless valve element capable of being controlled by the at least one controller. The process control system also includes a first transceiver configured to communicate with the at least one wireless valve element and a second transceiver configured to communicate wirelessly with the first transceiver. The second transceiver is further configured to communicate with the at least one controller.