Smart Conduit Plug With Status Indication for Hazardous Field Devices
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Solution Overview
Problem
Field devices in explosive environments lack local feedback on their operational status, making it difficult to determine if they are powered, functioning, and connected correctly, especially for devices without LCD displays.
Innovation Solution
A smart conduit plug with integrated electronics and a glass viewing window provides visual and potentially audio feedback on the status of field devices, including LEDs that indicate power, operation, alarms, and health, and can include additional sensors for environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If field devices are housed in explosion-proof enclosures, then safety is improved, but device complexity increases
Solution Approach 1:
The patent extracts the feedback function from the main field device and places it in a separate conduit plug. This allows the field device to maintain its explosion-proof enclosure while the conduit plug provides the feedback functionality. The conduit plug is a separate component that attaches to the enclosure, containing the LED indicator and electrical components outside the hazardous environment.
Solution Approach 2:
The conduit plug acts as an intermediary component between the explosion-proof field device enclosure and the external monitoring system. It provides a safe interface that allows electrical connections and visual feedback without requiring the main device to compromise its explosion-proof integrity.
2Reliability
If conduit ports are sealed to prevent explosion propagation, then safety is improved, but monitoring capability deteriorates
Solution Approach 1:
The conduit plug serves as an intermediary that maintains the seal integrity of the explosion-proof enclosure while providing a controlled interface for electrical connections and visual feedback. The LED indicator is positioned to be visible through the enclosure wall, allowing status monitoring without compromising the seal.
Solution Approach 2:
The patent uses color-changing LED indicators to provide visual feedback on device status. Different colors indicate different states such as power on, alarm conditions, or operational status. This allows information transmission through the sealed enclosure wall without requiring openings that would compromise explosion containment.
3Productivity
If field devices operate in hazardous environments, then productivity is maintained, but safety risk increases
Solution Approach 1:
The feedback monitoring function is extracted from the hazardous environment and placed in the conduit plug, which is positioned outside the explosion-proof enclosure. This allows continuous monitoring of field device status without requiring sensors or electronics inside the hazardous atmosphere.
Solution Approach 2:
The patent implements a feedback mechanism where the conduit plug receives electrical signals from the field device and translates them into visual LED indicators. This feedback loop allows operators to monitor device status in real-time from safe distances, maintaining productivity while eliminating the need for personnel to be exposed to hazardous environments.
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
Enables real-time monitoring and notification of field device status, enhancing safety and reliability by ensuring immediate detection of issues, even in hazardous environments.
Implementation Method 1
A smart conduit plug includes a plug body having an externally threaded region and a diameter and thread pitch to engage a conduit port. At least one electrical component is mounted relative to the plug body and is configured to electrically couple to a field device and provide an indication relative to the field device.
Data Source
AI summary
A smart conduit plug includes a plug body having an externally threaded region and a diameter and thread pitch to engage a conduit port. At least one electrical component is mounted relative to the plug body and is configured to electrically couple to a field device and provide an indication relative to the field device.