A device and method suitable for rapid detection of position information of high-speed vehicles

Abstract

The present invention discloses a device and a method suitable for rapid detection of position information of a high-speed moving vehicle. The device comprises a ground sensing coil, an oscillating circuit, an oscillating signal shaping circuit, a single chip microcomputer and peripheral circuit and an output signal control circuit. The ground sensing coil is connected with the oscillating circuit, the oscillating signal shaping circuit is configured to convert pulse signals output by the oscillating circuit to TTL level signals and feed the TTL level signals into an input capture function pinof the single chip microcomputer, the single chip microcomputer and peripheral circuit comprises a crystal oscillation circuit, a clock circuit and an automatic reset circuit which are required by work of the single chip microcomputer, and the output signal control circuit is connected with the output pin of the single chip microcomputer to output vehicle in-place information outwards. The deviceand the method suitable for rapid detection of position information of the high-speed moving vehicle take the single chip microcomputer as a core, a timing module of the single chip microcomputer anda mode of increasing the number of pulses are employed to improve the detection precision and speed of vehicle position information and perform discrimination of abnormal pulse signals in real time so as to improve the detection precision and ensure the system work reliability through software and hardware automatic reset functions.

Description

technical field [0001] The invention relates to a testing device and method for vehicle state information in the traffic field, in particular to a device and method suitable for rapid detection of position information of high-speed vehicles. Background technique [0002] Traffic flow detection, vehicle speed detection, intelligent traffic signal control and illegal photography are routine tasks in the traffic field. These tasks are inseparable from the monitoring of vehicle driving position information. At present, there are many testing methods for vehicle position information, such as ultrasonic detection, infrared detection, radar detection, and ground sensing coil detection. Among them, the ground sensing coil detection method has high precision. , low cost and easy to use, etc., have been widely used. [0003] When the vehicle passes the ground induction coil, the inductance of the ground induction coil will be slightly reduced, and the weak change in inductance is con...

AI Technical Summary

Problems solved by technology

However, this method has the following problems when detecting the position information of high-speed vehicles: the time required for the detection process is generally more than 50 milliseconds, and the increase in detection time makes it difficult for this method to capture the frequency changes when high-speed vehicles pass by, causing vehicle Especially for a large number of cars with fast speed and short length on the expressway, this processing method has a serious problem of missed judgment.

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