Magnetic resistant vehicle quantity and speed detecting node based on Zigbee wireless protocol and use methods thereof

Abstract

The invention provides a magnetic resistant vehicle quantity and speed detecting node based on a Zigbee wireless protocol, which comprises a shell, wherein a core processing plate and a power supply cell connected with the core processing plate are arranged in the shell; and a vehicle signal acquiring unit, a signal processing unit and a wireless communication unit which are connected are arranged on the core processing plate. The invention acquires the passing information of vehicles by the vehicle signal acquiring unit and finishes the corresponding functions of vehicle counting and vehicle speed measurement by the signal processing unit and the wireless communication unit. The invention also provides use methods of the magnetic resistant vehicle quantity and speed detecting node based on the Zigbee wireless protocol, which comprises a method for singly using the detecting node, a method for using the detecting node in pairs and a method for using the detecting node in a networking way. The detecting node can be singly used, used in pairs and used in the networking way and is convenient for finishing the corresponding functions of the vehicle counting and the vehicle speed measurement.

Description

technical field [0001] The invention relates to vehicle detection and monitoring technology and the field of wireless sensors, is a measurement node used for vehicle counting and speed measurement, applies Zigbee wireless communication protocol, and has the ability of wireless ad hoc network. Background technique [0002] With the increasingly serious traffic problems, Intelligent Transportation System (Intelligent Transportation System, ITS) came into being. ITS is a large-scale, all-round integrated transportation management system established by effectively integrating advanced information technology, data communication transmission technology, electronic sensing technology, electronic control technology, and computer processing technology into the entire transportation management system. A functioning, real-time, accurate and efficient integrated transportation and management system. ITS includes traffic information collection subsystem, information processing and analy...

AI Technical Summary

Problems solved by technology

But it still has the following problems in use: the investment and construction cost of the ring coil are high, the traffic obstruction phenomenon is serious during construction, the slit of the embedded coil softens the road surface, and the road surface is easily damaged; Cracks, etc.) or engineering construction, the toroidal coil is easily damaged, and its use effect and life will generally be affected; environmental changes and normal aging of the toroidal coil will also have a greater impact on the normal operation of the detector; the life of the toroidal coil is longer Short (generally two years), after which the road surface will be damaged and re-paved, etc.

The detector uses two pieces of HMCi051 to collect geomagnetic signals in two axial directions, and the cost is relatively high; the wireless communication chip used is nRF905 working in the 433Mhz frequency band, which does not support the Zigbee protocol and supports up to 8 devices Carrying out star network communication cannot constitute a wireless communication network in the true sense

Images