NIST, Partners ‘Cutting the Cord’ From Factory Communication Networks

Understanding how RF platforms work in industrial settings

Published: Tuesday, March 7, 2017 - 12:01

Providing wireless communications in a factory, plant, or other industrial environment these days means more than just helping employees talk with each other while they work. By eliminating physical connections such as wires and cables from a facility’s communication network, wireless technology offers many manufacturing, chemical processing, and municipal (such as water treatment) organizations a means to run their entire operation more efficiently, more productively, and at less cost.

However, a perceived lack of reliability, integrity, and security has hampered the adoption and use of industrial wireless, especially when wireless communication can often be corrupted or disrupted in harsh industrial settings.

Through its Wireless Systems for Industrial Environments project, the National Institute of Standards and Technology (NIST) is working with private-sector collaborators to overcome these obstacles and make industrial wireless communication a more viable choice. The latest milestone in this effort is a newly published study in which rigorous scientific experiments evaluated how well radio frequency (RF) signals propagated in three different factory environments: an automobile transmission assembly facility, a steam generation plant, and a machine shop.

“Understanding how RF platforms work or don’t work in these harsh environments is the first step toward designing and deploying reliable wireless networks,” said NIST’s Rick Candell, the lead researcher on the study. “With the data from this research and future tests, we can define factors that can hinder RF propagation—including heat, vibration, reflection, interference, and shielding—and then develop measures to address them.”

In their study of the three factory settings, Candell and his colleagues looked at three RF propagation characteristics. They made precise measurements of how the signals lost power over distance, dispersed over the factory floor, and varied in strength due to absorption or reflection by the specific environment.

“We clearly saw that wireless transmission of data in industrial facilities is completely different from signal propagation in a home or office setting,” says Candell. “It’s a harsh environment where reflective or absorbent surfaces, interference from competing RF signal traffic, and other obstacles must be overcome if we want to deploy secure, integrated wireless platforms that perform dependably.”

The researchers performed mathematical and statistical analyses of the data from the three factory experiments and are incorporating them into a NIST test bed designed to replicate a manufacturing environment. This “factory in a box” re-creates the conditions found in a variety of industrial settings, allowing researchers to study the effects on signal propagation in controlled laboratory conditions.

“The test bed supports the development of measurements and tests to evaluate signal performance, gives us the means to evaluate the usefulness of NIST computer models and simulations of wireless networks, and hopefully, will help us design and road test solutions to current propagation problems,” says Candell.

The NIST team also wants to hear from people involved with factories and plants about their specific industrial environments, including details about layout, structural makeup, operations, and communications networking, as well as future needs and plans for wireless.

“We hope that more managers will consider letting us conduct field trials of wireless in their facilities, especially ones with outdoor operations such as oil refineries or with possible signal-absorbing materials such as paper mills,” Candell said.

The Wireless Systems for Industrial Environments project will be featured in a panel session on wireless networking for industrial automation on March 13, 2017, at the IEEE Sensors Applications Symposium at Rowan University in Glassboro, New Jersey.

About The Author

NIST

Founded in 1901, the National Institute of Standards and Technology (NIST) is a nonregulatory federal agency within the U.S. Department of Commerce. Headquartered in Gaithersburg, Maryland, NIST’s mission is to promote U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life.