Explosive-sniffing robots to be used in US Army

The U.S. military - increasing its reliance on robots in war - soon will be using explosive-sniffing robots to better detect roadside bombs which account for more than 70 percent of the U.S. casualties in Iraq.

Photo: Explosive-sniffing robots to be used in US Army

Explosive-sniffing robots to be used in US Army

Fido is the first robot with an explosives sensor integrated into its body. iRobot Corp. is filling the military's first order of 100 in this southwest Ohio city and will begin shipping the robots over the next few months.

There are nearly 5,000 robots in Iraq and Afghanistan, up from about 150 in 2004. Soldiers use them to search caves and buildings for insurgents, detect mines and ferret out roadside and car bombs.

As the war in Iraq enters its fifth year, the U.S. government is spending more money on military robots and the two major U.S. robot-makers have increased production.

Foster-Miller Inc., of Waltham, Massachusetts, just delivered 1,000 new robots to the military. iRobot, of Burlington, Massachusetts, cranked out 385 robots in 2006, up from 252 in 2005.

The government will spend a total of about $1.7 billion (EUR 1.27 billion) on ground-based military robots between fiscal 2006 and 2012, according to Bill Thomasmeyer, head of the National Center for Defense Robotics, a congressionally funded consortium of 160 companies, universities and government labs. That's up from $100 million in fiscal 2004.

Fido, produced at the GEM City Manufacturing and Engineering plant in Dayton, represents an improvement in bomb-detecting military robots, said Col. Terry Griffin, project manager of the Army/Marine Corps Robotic Systems Joint Project Office at Redstone Arsenal, Alabama.

The bomb-sniffing sensor is part of the robot, with its readings displayed on the controller along with camera images. Otherwise, a soldier would have to approach the suspicious object with a sensor or try to attach it to a robot. The new robot also has a 7-foot (2-meter) manipulator arm so it can use the sensor to scan the inside and undercarriages of vehicles for bombs.

Officials would not release details of how the sensors work because of security concerns.

"The sniffer robot is a very good idea because we need some way of understanding ambiguous situations like abandoned cars or suspicious trash piles without putting soldiers' lives on the line," said Loren Thompson, defense analyst with the Washington D.C.-based Lexington Institute.

Philip Coyle, senior adviser to the Center for Defense Information in Washington, said the robots could be helpful if they are used in cases where soldiers already suspect a bomb. But he said explosive-sniffing sensors are susceptible to false positives triggered by explosive residues elsewhere in the area, smoke and other contaminants.

"The soldiers can begin to lose faith in them, and they become more trouble than they're worth," he said. "It can slow down things."

Thompson said all military robots have limitations. Their every move must be dictated by an operator, they can be stopped by barriers or steep grades, they are not highly agile, and they can break down or be damaged, he said.

Robots range in size from as little as 1.5 pounds (700 grams) to 110-pound (50-kilogram) versions that can move rubble and lift debris. Fido is an upgrade of PackBot, a 52-pound (23.6-kilograms) robot with rubber treads, lights, video cameras that zoom and swivel, obstacle-hurdling flippers and jointed manipulator arms with hand-like grippers designed to disable or destroy bombs. Each robot costs $165,000 (EUR 123,580).

Army Staff Sgt. Shawn Baker, 26, of Olean, New York, has helped detect and disable roadside bombs during two tours in Iraq - both with and without robots. Before the robots were available, he and fellow soldiers would stand back as far as they could with a rope and drag hooks over the suspect devices in hopes of disarming or detonating them.

"A couple of times you were closer than you needed to be, but it was something you had to do to get it done," Baker said.

Two soldiers were killed that way, he said. No one in his unit has been hurt or killed while disarming bombs since the robots arrived.

"The science and technology of this has been way out in front of the production side," Thomasmeyer said. "We're going to start to see a payoff for all the science and technology advancements."

iRobot posted $189 million (EUR 141.55 million) in sales in 2006, up 33 percent from 2005. Its military business grew 60 percent to about $76 million (EUR 56.92 million). Bob Quinn, general manager of Foster-Miller, said his company has contracts of $320 million (EUR 239.66 million) for military robots and that its business has doubled every year for the past four years.

Griffin, of the Robotic Systems office, said military robots are here to stay.

"This is the beginning," he said.