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Device: Infrared Detector

The passive infrared detector provides the capability to automatically detect the presence of pedestrians in either the targeted curbside area or within the crosswalk. When used to detect pedestrians in the crosswalk, its function is to detect the presence of individuals requiring additional time to cross, and accordingly extend the clearance interval and provide more time to cross. These detectors function by sensing changes in thermal radiation caused by movement within the field of view. A pedestrian entering the target area causes such a temperature change to occur, which in turn, is detected by the sensor. These detectors may either be used to supplement or replace the standard push button used to activate the pedestrian call feature.

Infrared detectors are presently installed in Portland, OR

Pedestrians entering the curbside infrared detection zone (shown in red) will activate the pedestrian call feature. While those detected in the crosswalk (shown in blue) will extend the clearance interval.

company specific devices:

Sentrol

The unit manufactured by this company is designed for outdoor use and is enclosed in a cast metal housing. It is designed to operate in temperatures ranging from -40 to 120 degrees F and can be mounted in a variety of positions. The detector itself uses a dual pyroelectric sensor and features a signal processing circuit that contains bi-directional pulse counting and motion verification, which allows the unit to be programmed for specific applications.

Units are currently being used for curbside pedestrian detection at crosswalk sites in Portland, OR.

For more information on this device, including technical specifications, go to:
www.sentrol.com/products/product.asp

or contact:

Jerry Outslay
Sentrol
12345 SW Leveton Drive
Tualatin, OR 97062
Phone: (503) 691-7330
Fax: (503) 691-7566
email: jerry.outslay@sentrol.com

ASIM Technologies Ltd.

The unit manufactured by this company uses passive infrared (PIR) detection technology to sense the presence of pedestrians in crosswalks, and accordingly, extend the clearance interval. The IR 200 series for pedestrians uses thermal radiation in the far infrared part of the electromagnetic spectrum of the body to sense the pedestrian. The dynamic PIR detectors discriminate between slightest changes in thermal radiation caused by movement in their field of view. The detectors are typically mounted on top of a signal head and aimed to cover the whole area or a part of a crossing. The detectors are incased in a 75 mm by 145 mm metal housing.

For more information on this device, including specifications, go to http://xtralis.com/p.cfm?s=22&p=381 or contact:

ASIM Technologies Ltd
Ziegelhof-Strasse 30
P.O. Box 103
CH-8730 Uznach, Switzerland
Telephone +41-55-285-9999
Fax +41-55-285-9900

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