An interdisciplinary team of ECBC scientists and engineers receives data on a simulated chemical agent release and directs unmanned aerial and ground vehicles carrying sensors to intercept and identify it at the SK Challenge at Dugway Proving Ground.

Army tests chemical, biological sensor integration in Utah desert

The U.S. Army Edgewood Chemical Biological Center joined with technology developers from private industry and other Army and joint organizations to test a new integrated system of chemical and biological agent sensors Aug. 15–26 at Dugway Proving Ground’s West Desert Test Center.

The test took place at a U.S. Army Test and Evaluation Command technology demonstration called the SK Challenge. ECBC’s team participated after nearly a year of preparation. Scientists and engineers from across ECBC worked together to develop a unmanned aerial vehicle they call Deep Purple and modified an unmanned ground vehicle known as the Mobile Detection Assessment and Response System, or MDARS, for the event.

These systems operated as platforms for chemical and biological sensors which were tested against a variety of simulant agents to see if the sensors could correctly identify them. ECBC scientists and engineers modified existing sensor packages to fit inside a thermos-shaped container called the Array Configurable of Remote Network Sensors that is affixed to the bottom of Deep Purple or is mounted on the roof of MDARS. Those sensor packages include the Tactical Biological Generation II Detector, called TACBIO, which rapidly detects the presence of an airborne biological threat, and the Joint Chemical Agent Detector, which is an automatic chemical warfare agent detector.

In many ways, Deep Purple was the star of the show for ECBC. It is a carbon fiber quad copter drone made up of commercial off-the-shelf parts developed in partnership with the Johns Hopkins Physics Laboratory for the Defense Threat Reduction Agency. It is unique because it is capable of carrying a five-pound payload of sensors.

ECBC’s Advanced Design and Manufacturing Branch used its 3D printing capability to include a number of innovations. They include hollow arms holding the propellers which house wires internally. Also the team printed its airframe using printed circuit boards rather than functionally inert carbon fiber to allow direct, real-time communication between the payload and the drone operator. The information provided by the sensors can be passed to Soldiers in the field and command and control in real time from as far away as two miles.

The testing took place entirely at night in order to catch just the right desert wind effects, which only occur after 11 p.m., and the team worked intently every night until 5 a.m. Upon each agent release, the drone would lift straight up, green and red lights blinking, and head off into the desert night to intercept the agent simulant cloud. Likewise, the unmanned ground vehicle traveled down dirt roads following the vectors provided by a laser detection system operated from a nearby trailer.

“We are taking the opportunity of the SK Challenge to see how well Deep Purple, MDARS, and the sensors operate as reliable and responsive chemical and biological early warning sensor technologies,” said Dr. Alan Samuels, ECBC team leader and principal investigator.

“We saw that the chemical sensors mounted on Deep Purple worked well at intercepting the cloud and identifying the simulants. However, our biological agent sensor, TACBIO, is too large for Deep Purple and only worked on MDARS. It needs to be miniaturized for that purpose. The SK Challenge proved its value to ECBC by revealing what our system does well and where it needs more work. We’ll come back next year having built upon what we learned this time.”

The annual SK Challenge offers participants a low-cost opportunity to operate technology they have under development in a collaborative environment, according to Russell Bartholomew, one of the event organizers and a test officer in ECBC’s newly established Bio-Testing Branch at Dugway.

“It’s a cost-sharing event that attracts participants from DoD organizations, private industry, and international partners alike,” Bartholomew said. “They get to work together using their individual technologies in concert, and the U.S. Army Test and Evaluation Command gets to see what technologies are out there and how far along they are in their development.”

The ability of ECBC’s scientists not only to remotely direct these platforms, but to also collect the sensors’ incoming data in a single information sharing system, was just as much a new cutting edge technology as operating the autonomous drones.

“This is a system of systems, every part has to be able to communicate with every other so it works as an integrated system,” said Steven Lagan, a team member from ECBC’s Modeling, Simulation, and Analysis Branch. “We get data on the location and movement of the simulant cloud from stationary sensors, which we can then send to our sensor-mounted vehicles. The sensors then communicate to us the identity of the agent, which we share with all the other participants, and if this were real, the chain of command, through a common operating language.”

Creating a common language that could be used by all the participants and the sensors alike was a project of just as a great a magnitude as creating and perfecting the drones and unmanned vehicles.

“We’re working with lots of different components from all over the country, every component is like its own project,” said Max Bottiger, a team member in ECBC’s Battlefield Information Branch. “We had to invent pieces of software code compatible with the Army’s common operating language to make it all work together. We wrote all the programs from top to bottom as well as laterally.”

ECBC Director Dr. Joseph Corriveau came out to see the technology demonstration for himself and was impressed.

ECBC Director Joseph Corriveau, Ph.D. holds Deep Purple, an unmanned aerial vehicle developed by ECBC, which proved its ability to intercept a chemical agent simulant cloud and identify the simulant at the SK Challenge.

“A diverse set of professionals working together made this happen. Not only the brightest people from private industry and other Army and joint organizations, but scientists and engineers from many different branches, divisions and directorates within ECBC,” he said.

“There is a huge push from the Department of Defense to get on the forefront of this technology. This shows that we are collaborating to position ourselves well ahead of the rest of the world in chemical biological defense.”

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The U.S. Army Edgewood Chemical Biological Center is part of the U.S. Army Research, Development and Engineering Command, which has the mission to ensure decisive overmatch for unified land operations to empower the Army, the joint warfighter and our nation. RDECOM is a major subordinate command of the U.S. Army Materiel Command.

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