Aimed at drawback of low sensitivity of frequency divided method used in traditional vehicle detector,we present a novel inductive vehicle detector design method based on the basic operating principle of loop coil vehicle detector.

This paper introduces the theory of vehicle speed detection based on loop coil,analyzes the present speed estimation methods using the basic outputs of single loop detectors.

The precision of count and speed test of inductive loop vehicle detector relates the veracity of traffic flux statistical result,which is verifiable key item.

This paper analyzes the principle of loop transducer of vehicles in detail, presents the equivalent circuit, establishes the mathmatic model of loop, and introduces briefly the application of the loop transducer.

Based on the real-time traffic data obtained by loop detectors,a multi-phase and fuzzy signal control is designed for a complicated intersection crossed of three roads.

A simulation is given to show the effectiveness of the proposed method with loop detector information.

Finally,a simulation experiment is undertaken with the data collected from loop detector.