CN202454083U - Traffic light control device based on ZigBee - Google Patents

Abstract

The utility model discloses a traffic traffic light control device based on ZigBee. This includes a vehicle flow information collection device installed on the ground and a signal control device connected to traffic lights. The traffic flow information collection device includes a first single-chip microcomputer, a first radio frequency chip and an electromagnetic vehicle detection sensor. The signal control device It includes a second radio frequency chip and a second single chip connected to traffic lights, the first radio frequency chip and the electromagnetic vehicle detection sensor are respectively connected to the first single chip, and the second radio frequency chip is connected to the second single chip. By using the ZigBee wireless communication protocol, the device can realize the real-time and dynamic control of the time length of traffic lights according to the change of traffic flow, reduce the waiting time of vehicles at intersections, and alleviate traffic congestion.

Description

A traffic light control device based on ZigBee

technical field

The utility model relates to electronic device technology, in particular to a traffic traffic light control device based on ZigBee.

Background technique

The existing traffic light control device is mainly a timing control device, which is provided with fixed time lengths and cycle periods of each traffic signal. This method cannot adapt to the dynamic changes of traffic flow, and it is easy to wait for the traffic light when a road with a large traffic flow at the intersection, while another empty road or a road with relatively little traffic flow still lights up according to a fixed time. The phenomenon of the green light.

Contents of the invention

Aiming at the shortcomings of existing traffic light control devices, the purpose of this utility model is to provide an intelligent traffic control device that can automatically adjust the time length of traffic lights according to the size of traffic flow.

In order to realize the above technical tasks, the utility model adopts the following technical solutions:

A kind of traffic light control device based on ZigBee, it is characterized in that, comprise the traffic flow information acquisition device installed on the ground and the signal control device that is connected with traffic traffic light, described traffic flow information acquisition device comprises the first single-chip microcomputer, the first radio frequency chip and an electromagnetic vehicle detection sensor, the signal control device includes a second radio frequency chip and a second single-chip microcomputer connected with traffic lights, and the first radio frequency chip and the electromagnetic vehicle detection sensor are respectively connected with the first single chip microcomputer, so The second radio frequency chip is connected to the second single-chip microcomputer.

The first single-chip microcomputer and the second single-chip microcomputer all adopt the MC9S08GT single-chip microcomputer of Motorola.

Both the first radio frequency chip and the second radio frequency chip are CC2430 radio frequency chips.

By using the ZigBee wireless communication protocol, the device of the utility model can realize the real-time and dynamic control of the time length of traffic lights according to the change of traffic flow, reduce the waiting time of vehicles at intersections, and alleviate traffic congestion.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the working principle of the utility model.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Detailed ways

Example:

As shown in Figure 1, the traffic traffic light control device based on ZigBee of this embodiment comprises the traffic flow information collection device installed on the ground and the signal control device connected with the traffic traffic light, and the traffic flow information collection device includes the first single-chip microcomputer, the second A radio frequency chip and electromagnetic vehicle detection sensor, said signal control device comprises the second radio frequency chip and the second single-chip microcomputer connected with the traffic lights; wherein the first single-chip microcomputer and the second single-chip microcomputer all adopt the MC9S08GT single-chip microcomputer of Motorola, the first Both the radio frequency chip and the second radio frequency chip adopt the CC2430 radio frequency chip of Chipcon Company.

As shown in Figure 2, the roads are all two-way single-lane lanes, and the electromagnetic vehicle detection sensor at D1 at intersection ₁ collects data from vehicles in the directions A1 _{- D1} , B1 _{- D1} , and _C1 - _D1 . information, and transmit this information to the first single-chip microcomputer at intersection 1, the information includes the total number of vehicles passing in this period of time and the number of vehicles passing in unit time. The first single-chip microcomputer of intersection 1 sends signal (beacon frame) to the second radio frequency chip of intersection 2 place traffic light devices by the first radio frequency chip of intersection 1, after the second radio frequency chip of intersection 2 receives signal (beacon frame), Transmit to the second single-chip microcomputer of intersection 2; The electromagnetic vehicle detection sensor at the B ₃ place of intersection 3 gathers the information from A ₃ -B ₃ direction, C ₃ -B ₃ direction, D ₃ -B ₃ direction vehicle, and This information is transmitted to the first single-chip microcomputer of the intersection 3, and the first single-chip microcomputer of the intersection 3 sends a signal (beacon frame) to the second radio frequency chip of the traffic light device at the intersection 2 by the first radio frequency chip of the intersection 3, and the second radio frequency of the intersection 2 After the chip receives the signal (beacon frame), it transmits to the second single-chip microcomputer at intersection 2. The second single-chip microcomputer at intersection 2 will compare and process the signal from the first radio frequency chip of intersection 1 and the first radio frequency chip of intersection 3 and the beacon frame information pre-stored inside them, and then adjust the lighting time of the red light and the green light. If the traffic flow is larger, then the green light time is extended according to the built-in program of the second single-chip microcomputer.

The electronic components used in the device of the utility model are all commercially available known products, and those skilled in the art can realize the connection of the electronic components according to the technical effect of the application.

Claims (3)

1. traffic-control device control device based on ZigBee; It is characterized in that; Comprise information of vehicle flowrate harvester that is installed on ground and the signal control device that is connected with traffic-control device; Said information of vehicle flowrate harvester comprises first single-chip microcomputer, first radio frequency chip and electromagnetic type vehicle detection inductor; Said signal control device comprise second radio frequency chip with the second singlechip that is connected with traffic-control device, said first radio frequency chip is connected with first single-chip microcomputer respectively with electromagnetic type vehicle detection inductor, said second radio frequency chip is connected with second singlechip.

2. the traffic-control device control system based on ZigBee as claimed in claim 1 is characterized in that said first single-chip microcomputer and second singlechip all adopt the MC9S08GT single-chip microcomputer of Motorola.

3. the traffic-control device control system based on ZigBee as claimed in claim 1 is characterized in that said first radio frequency chip and second radio frequency chip all adopt the CC2430 radio frequency chip.

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