Self-adaptive multi-level radio network signal lamp system and control method thereof

Abstract

The invention discloses a multi-level radio network-based self-adaptive signal lamp system and a control method thereof. The system is characterized by consisting of a management terminal, a gateway electronic control unit (ECU), a signal driving test ECU, and a vehicle detecting ECU; in the invention, the gateway ECU, the signal driving test ECU, and the vehicle detecting ECU arranged at each intersection are respectively taken as a coordinator, a router and a terminal node of ZigBee network for performing network and layout; the excellent characteristics of radio sensing network, such as self-organization, multi-hop routing, etc. are kept; the integral robustness, reliability and maintainability are improved; and the construction and electrical wiring are simplified. The global system for mobile communications (GSM) interface of the gateway ECU makes the management terminal and a plurality of intersections realize a green wave band coordination control function in short message internet manner. Based on a hierarchical control system of a multi-level network structure, the system can be used for handling overall traffic flow intelligence dispersion on a large scale, and has the characteristics of capability of independent running at a single intersection and keeping system intelligence even a management terminal network system fails.

Description

technical field [0001] The invention relates to an adaptive multi-level wireless network signal light system and a control method thereof, more specifically an intelligent signal light network based on upper layer GSM and bottom layer ZigBee and a control method based on the multi-level network. Background technique [0002] The currently used traffic light control system mainly adopts a single-point control mode, and each signal control machine cannot be connected with the traffic management center. A small number of traffic light signal control machines that can be networked are basically connected through wired connections. There are very few signal controllers that really use wireless networking, mainly through the general packet radio service (GPRS) or code division multiple access radio communication technology (CDMA). [0003] Because the single-point control traffic signal controller cannot make each intersection work together, it is difficult to form a green wave be...

AI Technical Summary

Problems solved by technology

[0003] Because the traffic signal controller with single-point control cannot make each intersection work together, it is difficult to form a green wave belt; while the traffic signal controller with wired network needs to excavate roads and lay pipelines, the construction period is long and the cost is high; Fully utilize the public wireless network, the communication cost is too high

Moreover, the current signal control system has no lamp monitoring function, and can only rely on inspections or road traffic police / driving reports

The current intersection signal lights are usually controlled according to several fixed timing schemes and cannot be automatically adjusted according to the traffic conditions at the intersection.

Even if there is an adaptive function, it is only an induction coil type, and the real-time and practicality are poor

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