Wireless magnetic induction intensity vehicle detection method and device

Abstract

The invention discloses a wireless magnetic induction intensity vehicle detection method and a wireless magnetic induction intensity vehicle detection device. The method comprises the following steps of: a, sensing the space magnetic induction intensity and converting the space magnetic induction intensity into an electric signal; b, transmitting and amplifying the electric signal in the step a in a serial mode; c, converting the electric signal in the step b into a digital signal through A / D conversion, and calculating a magnetic induction intensity value; d, comparing the obtained magnetic induction intensity value in the step c with the space constant magnetic induction intensity value so as to obtain a detection result, judging whether a vehicle is present or not when the magnetic induction intensity value is greater than or smaller than a threshold, and performing advanced signal processing on a sampled signal to acquire the traffic, vehicle speed, occupied time, vehicle type, and other traffic information; and e, transmitting the detection result in the step d to an information center in a wireless mode. The wireless magnetic induction intensity vehicle detection device comprises a magnetic induction intensity sensor, a multiplexer, an analog signal amplifier, a microcontroller and a wireless data transceiver module, which are connected in turn and are connected with a power supply. The wireless magnetic induction intensity vehicle detection method is simple and convenient, and the wireless magnetic induction intensity vehicle detection device is convenient to set.

Description

technical field [0001] The invention relates to the field of vehicle signal detection and wireless transmission in the traffic field, in particular to a method and device for wireless magnetic induction vehicle detection. Background technique [0002] The existing traffic network is overloaded, and improving its operating efficiency is an urgent requirement for traffic development. Important links such as traffic management, assessment and planning must be carried out on the basis of mastering the existing traffic conditions. How to efficiently collect massive traffic information generated by modern urban systems is a challenging topic. The use of electronic information technology to collect road traffic information is the basic means. Several major technologies such as inductance coil, video, and microwave (RTMS) have emerged in engineering practice for decades. However, they have shortcomings in some aspects: the installation of inductance coils requires a large amount o...

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Problems solved by technology

However, they have shortcomings in some aspects: the installation of inductance coils requires a large amount of work to block traffic, and it is easily damaged and the maintenance cost is high; the technology based on video image processing is greatly affected by natural weather conditions, installation location and road complexity, and the accuracy is insufficient. ; RTMS is easily affected by obstructions (such as isolation belts), and has high requirements for layout. The installation location affects its detection performance, and the cost is high, and the investment in large-scale deployment is huge

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