Non-contact EM Sensor Cable Signal Decoding
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Solution Overview
Problem
Process facilities face challenges in monitoring and decoding modulated signals transmitted through cables, particularly in large tank storage environments, where existing solutions require direct contact and are not efficient for real-time data retrieval.
Innovation Solution
A non-contact electromagnetic field sensor-based monitoring device that detects and decodes modulated signals on cables using a processor and signal conditioner, capable of identifying various communication protocols and displaying decoded data, allowing for remote and precise signal analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-contact EM sensor is used to detect modulated signals on cables, then operator safety is improved and operational efficiency is enhanced, but signal detection precision may be compromised due to the non-contact nature of the sensing
Solution Approach 1:
The patent uses the cable's electromagnetic field as an intermediary carrier to transmit signal information from the process control system to the monitoring device. The EM sensor detects modulations in this field without physical contact, allowing safe remote monitoring while maintaining signal integrity through the field-mediated transmission process
Solution Approach 2:
The patent replaces direct mechanical/electrical contact-based signal reading with non-contact electromagnetic field sensing. This substitution eliminates the need for physical connection to the cable while enabling signal detection through electromagnetic induction, thereby improving safety without sacrificing measurement capability
2Ease of operation
If existing contact-based signal reading methods are used, then signal detection is straightforward, but operational efficiency is reduced and safety risks increase due to the need for direct contact with cables in process facilities
Solution Approach 1:
The monitoring device autonomously performs signal detection, conditioning, and decoding without requiring operator intervention for physical connection or manual signal extraction. The system self-services by automatically sensing the electromagnetic field, processing the modulated signal through conditioning circuits, and displaying decoded information, thereby maintaining simplicity while dramatically improving operational efficiency
3Loss of information
If contact-based monitoring devices are used, then signal access is direct, but the system becomes invasive and may disrupt the electromagnetic field or cable operation
Solution Approach 1:
The patent extracts signal information from the electromagnetic field without physically interacting with the cable or its carriers. By taking out only the informational content through non-contact EM sensing, the system maintains direct signal access while eliminating the invasive physical connection that would otherwise disrupt the electromagnetic field or cable operation
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 efficient, non-invasive monitoring and decoding of modulated signals, improving operational efficiency and safety by providing real-time data without disrupting the electromagnetic field, and supporting multiple communication protocols for versatile application.
Implementation Method 1
a non-contact electromagnetic field sensor (EM sensor) configured for non-contact sensing the EM field associated with a modulated parameter signal transmitted on at least one cable
Data Source
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AI summary
A method for sensing modulated signals in a process facility. The method includes providing a monitoring device that includes a non-contact electromagnetic sensor (EM sensor) configured to sense a modulated signal transmitted on a cable including a conductor coupled to a sensing device or apparatus in the process facility. The monitoring device further includes a non-transitory machine readable storage device and a processor. The non-transitory machine readable storage device stores a data decoding program including protocol information for identifying different communication protocols. The monitoring device is positioned in proximity to the cable for the EM sensor to detect the modulated signal. The data decoding program is implemented by the processor causing the processor to detect the modulated signal and condition the modulated signal to provide a conditioned modulated signal. The conditioned modulated signal is decoded to generate decoded signal data, and the decoded signal data is displayed.