Wireless Partial Stroke Testing for Emergency Shutdown Valves
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Solution Overview
Problem
Existing methods for conducting partial stroke tests on emergency shutdown valves in industrial process control systems often require physical proximity and wired connections, which can be impractical, expensive, and pose safety risks, especially in hazardous environments.
Innovation Solution
A system that initiates and monitors partial stroke tests of emergency shutdown valves using wireless communication links, allowing operators to use portable devices like smartphones or PDAs to command and collect data from the ESD system via protocols like Bluetooth or WirelessHART, eliminating the need for wired access and reducing exposure to hazardous conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired connections are used for initiating and monitoring partial stroke tests, then reliable data transmission is achieved, but operator safety is compromised and installation complexity increases
Solution Approach 1:
The patent replaces wired mechanical connections with wireless communication technology. Portable devices communicate with ESD valve controllers through wireless protocols, eliminating the need for physical cable connections. This substitution maintains data transmission reliability while removing the safety hazards associated with operators physically connecting wires in hazardous environments.
Solution Approach 2:
The patent introduces wireless communication signals as an intermediary between the operator and the ESD valve system. Instead of direct physical connection, the wireless signal acts as a mediator that transmits test initiation commands and monitoring data without requiring operator proximity to the valve or physical contact with electrical components.
2Ease of operation
If operators physically approach ESD valves during testing, then direct observation of valve operation is possible, but exposure to hazardous environments increases
Solution Approach 1:
The patent creates a digital copy of the valve operation data transmitted wirelessly to portable devices. Instead of requiring operators to physically observe the valve, the system captures operational parameters (position, pressure, temperature) and transmits them as digital representations to remote displays, allowing indirect observation without hazardous exposure.
Solution Approach 2:
The patent transitions the observation dimension from physical space to digital space. Valve operation data is projected onto portable devices that operators can view from safe distances, effectively moving the observation interface from the same physical dimension as the hazardous valve to a separate digital dimension accessible anywhere within wireless range.
3Reliability
If wired access is required for partial stroke testing, then system reliability is maintained, but operational flexibility and accessibility are reduced
Solution Approach 1:
The patent transforms the static wired connection system into a dynamic wireless system. The communication interface becomes adaptable and mobile, allowing test initiation and monitoring from various locations around the facility. This dynamic approach maintains system reliability through robust wireless protocols while dramatically improving accessibility and operational flexibility.
Solution Approach 2:
The patent creates a universal wireless communication interface that can initiate tests, monitor operations, and retrieve diagnostic data from multiple ESD valves using a single portable device. This multi-functional capability replaces the need for valve-specific wired connections, enhancing both reliability through standardized communication and versatility through broad applicability across different valve locations and types.
Data Source
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AI summary
A method for conducting a partial stroke test of an emergency shutdown valve (204) includes receiving a request to initiate the partial stroke test from a user interface or another source, establishing a direct or an indirect wireless communication link with the emergency shutdown valve, and generating one or more commands of a digital industrial automation protocol to be transmitted to the emergency shutdown valve via the wireless communication link (224), so that a partial stroke test of the emergency shutdown valve is initiated in response to these commands.