Reno a + E

Jason Zhen-Yu Lu

Allen Jacobs

Benjamin Luke

Thomas Ray Potter

A vehicle detector detects bicycles and discriminates between a bicycle and a motorized vehicle using a specific signature analysis technique when operated in the bicycle detect mode and the bicycle only detect mode. The signature analysis technique employs two sets of rules: one set for a bicycle which produces a signature having at least two peaks and two valleys when passing over a loop connected to the vehicle detector; the other for a bicycle which produces a signature having two peaks and only one valley when passing over a marginal side region of a loop connected to the vehicle detector. Peak and valley searches are conducted sequentially, with a peak search being conducted first upon start-up.

Bicycle detector with improved detection using signature analysis

A vehicle detector system having a number of individual vehicle detectors each capable of sampling a plurality of vehicle loops in mutual synchronization. One detector operates as a master detector for synchronization purposes; the other detectors are operated as slave detectors. The system can be configured for series or parallel synchronous operation. The system is particularly advantageous in installations requiring a large number of closely spaced vehicle loops each operated by a detector set to high sensitivity.

Vehicle detector system with synchronized operation

A method and apparatus for automatically testing the integrity of an inductive loop in a vehicle detector system. A check loop is placed adjacent each inductive loop in a multi-channel vehicle detector system. Each check loop is periodically activated by the vehicle detector to simulate a vehicle load on the associated inductive loop. Samples representing loop inductance at different activation periods are compared with a standard. When the result exceeds the standard, the inductive loop is subjected to additional sample testing with decreasing time intervals between sampling. After a number of additional samples exceed the standard, the inductive loop is deemed failed.

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Sparks, NV, United States of America

Jason Zhen-Yu Lu