A Low-cost Through-metal Communication System for Sensors in Metallic Pipes

Metallic pipes and other containers are widely used to store and transport toxic gases and liquids. Various sensors have been designed to monitor the environment inside metallic pipes and containers, such as pressure, liquid-level, and chemical sensors. Moreover, sensors are also used to inspect and...

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Bibliographic Details
Published in:arXiv.org 2023-04
Main Authors: Guo, Hongzhi, Prince, Marlin, Ramsey, Javionn, Turner, Jarvis, Allen, Marcus, Samuels, Chevel, Jordan Atta Nuako
Format: Article
Language:English
Subjects:
Algorithms
Aluminum
Amplifiers
Cables
Chemical sensors
Coils
Communications systems
Containers
Demodulation
Electronic components
Low cost
Microcontrollers
Modules
Pipes
Prototypes
Sensors
Signal processing
Wireless communications
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Summary:Metallic pipes and other containers are widely used to store and transport toxic gases and liquids. Various sensors have been designed to monitor the environment inside metallic pipes and containers, such as pressure, liquid-level, and chemical sensors. Moreover, sensors are also used to inspect and detect pipe leakages. However, sensors are usually placed outside of metallic pipes and containers and use ultrasound to monitor the internal unseen environment. This is mainly due to the fact that internal sensors cannot communicate with external data sinks without cables, but using cables can dramatically affect the metal-sealed structure. Wireless communication is desirable to communicate with internal sensors, but it experiences high attenuation losses since metal can block wireless signals due to its high conductivity. This paper develops a low-cost through-metal communication system prototype using off-the-shelf electronic components. The system is fully reconfigurable, and arbitrary modulation and coding schemes can be implemented. We design the transmit module which includes a signal processing microcontroller, an amplifier, and a transmit coil, and the receive module which includes a receive coil, an amplifier, and a microcontroller with demodulation algorithms and bit-error-rate (BER) calculations. The performance of the prototype is evaluated using various symbol rates, distances, and transmission power. The results show that the communication system can achieve a 500 bps data rate with 0.01 BER and 3.4 cm communication range when penetrating an Aluminum pipe with 7 mm thickness.
ISSN:2331-8422
DOI:10.48550/arxiv.2304.06890