Shaanxi Province, in north-central China, is home to some 37 million people and contains about 1,500 miles of expressways spread over 79,000 square miles--a little more area than Nebraska.
Keeping watch over that sprawling system takes a lot of cameras and back-end support. Since 2005, most of the expressways the province have been using Infinova surveillance tools--including more than over 2,000 cameras, about 100 video matrix switching systems, plus fiber-optic modems.
“Effective highway video surveillance alerts authorities as congestion starts to develop and helps them deploy highway patrols to manage traffic flow and reduce delays,” said Mark S. Wilson, Infinova vice president of marketing. “When accidents occur, the authorities can assess the situation quickly. Using rapid maneuverability cameras, operators can capture the early stages of a highway incident and provide life-saving information to emergency teams.”
The cameras used are designed specifically for outdoor video surveillance on highways and intelligent transport systems (ITS). Infinova’s V1492/V1493 medium-load integrated PTZ system can operate in winds up to 130 mph (200 km/h) and features a 15-inch (38 cm) housing for its half-inch (1.27 cm) high-resolution camera plus half-inch motorized zoom lens, giving operators a better, long range view.
The system is equipped with a compass display so that operators can see in which direction the camera is looking, as well as a privacy masking with 16 programmable zones. The V1493 has 360° unlimited continuous pan with a pan speed up to 50° per second and a tilt range of +40° to -90° with a tilt speed up to 30° per second so that operators can look straight down and tilt the camera up to look up hills in the highway.
The housing is IP66 rated, meaning it's dust-tight and is equally protected against water ingress. The housing is also equipped with a wiper, heater and defroster for extreme conditions.
The Shaanxi system is just one example of the growing Chinese surveillance marketplace, projected to grow at about 20 percent each year from 2010 through 2014.
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