Zigbee technology based signaler switching determination method

Abstract

The invention relates to a Zigbee technology based signaler switching determination method, which solves the defect of incapability of realizing a signaler switching determination method by use of a ZED compared to the prior art. The method comprises the following steps: initializing equipment; logging the distance between the ZED installed nearby a signaler and the signaler and ZED number information into a vehicle-mounted mobile terminal; waiting for intervention, i.e., the ZED waiting for a bus provided with the vehicle-mounted mobile terminal to enter a communication scope; performing equipment communication, i.e., the vehicle-mounted mobile terminal reading the number of the ZED in a current communication scope and the time for passing through the ZED; calculating expected arrival time, i.e., calculating the time needed for a current vehicle to enter a signaler crossing; determining the switching state of the signaler, and performing control and adjustment on the current situation of the signaler according to the predicted arrival time. According to the invention, by use of the ZED, the determination of the switching of the signaler is realized.

Description

[0001] technical field [0002] The invention relates to the Zigbee technology, in particular to a signal switch judging method based on the Zigbee technology. [0003] Background technique [0004] At present, the priority control of traffic lights is mostly realized by GPS positioning technology. By installing GPS equipment on the bus, the priority control of traffic lights can be achieved, and the efficiency of public transportation can be improved. However, the current GPS positioning technology cannot perform precise positioning. At the same time, there is also the problem that the GPS position will drift under the elevated road. As a result, in some road sections and areas, the priority control of traffic lights cannot be normally realized. Therefore, the priority control of signal machines based on Zigbee technology has become the best choice. However, the current Zigbee network cannot accurately locate the vehicle. The communication distance between the vehicle-mo...

AI Technical Summary

Problems solved by technology

However, the current GPS positioning technology cannot perform precise positioning. At the same time, there is also the problem that the GPS position will drift under the elevated road. As a result, in some road sections and areas, the priority control of traffic lights cannot be normally realized. Therefore, the priority control of signal machines based on Zigbee technology has become the best choice

However, the current Zigbee network cannot accurately locate the vehicle. The communication distance between the vehicle-mounted mobile terminal and the intersection is only a range value, and the switching judgment of the signal controller needs to obtain the precise time value when the vehicle arrives at the intersection.

Although from the perspective of Zigbee equipment, a Zigbee mobile node with small-scale communication, namely ZED, can be added on the basis of the wireless network established by Zigbee, and the position of the vehicle can be positioned through the ZED, but how does this positioning data communicate with the switching judgment of the signal controller? Combine

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