CN209087143U - A kind of intelligent traffic light node control system - Google Patents

Abstract

The utility model discloses a kind of intelligent traffic light node control system, including traffic lights main controller, electronic tag, by toroidal coil sensors and singlechip group at ground induction coil detector and host computer.Traffic lights main controller includes electronic label reader, antenna, STM32 controller, traffic lights drive module, WIFI communication module and OV7670 camera.Emergency vehicles are to intersection, electronic tag receives radiofrequency signal, data are transmitted to host computer by WIFI module by traffic lights main controller after reader decodes, planning optimal path simultaneously returns to emergency vehicles, while crossing traffic image is uploaded to STM32 controller control traffic lights switching time by OV7670 camera；When not having emergency vehicles, single-chip microcontroller counts the vehicle flowrate for driving into and being driven out to and is transmitted to host computer processing, obtains best traffic lights split, passes traffic lights main controller control traffic lights switching time back.

Description

A kind of intelligent traffic light node control system

Technical field

The utility model belongs to technology of Internet of things and technical field of RFID, and in particular to a kind of intelligent transportation light node Control system.

Background technique

Traffic environment is the important evidence that people evaluate a city, and chaotic traffic environment will necessarily make city image big It gives a discount.Therefore, resolving traffic lights node control problem will be orderly traffic, safety, the important leverage quickly run.

The existing intelligent transportation system based on Radio Frequency Identification Technology, theoretically solves and breaks rules and regulations automatically to vehicle Processing, tracking processing, the functions such as real-time query and statistics, but lack the traffic light control and emergency event passed through to emergency vehicles When emergency vehicles optimal path selection, and traffic light control system is all single fixed time sequence control, cannot It is enough that control is adjusted according to actual traffic situation.Identification emergency vehicles and the traffic light control for planning optimal path, vehicle flowrate System can more effectively realize wisdom traffic management so that the time variation of traffic lights is promoted.At the same time, Internet of Things Also constantly developing.Technology of Internet of things can use the technologies such as radio frequency identification and carry out information collection to vehicle in real time, pass through Vehicle is accessed into various communication networks, real-time perfoming information sharing interaction, and collected data are analyzed and processed, is realized Intelligentized decision and control.

Summary of the invention

The main purpose of the utility model is to overcome defects in the prior art, provide a kind of intelligent transportation light node control The phenomenon that system processed improves the efficiency of traffic control, can effectively alleviate traffic congestion.

In order to achieve the above object, the utility model uses following technical scheme:

A kind of intelligent traffic light node control system of the utility model, including host computer further include needing to know for storing The electronic tag of the defeated information of supplementary biography, for detection coil frequency of oscillation variation and statistical vehicle flowrate ground induction coil detector and For receiving and processing the traffic lights main controller of electronic tag or ground induction coil detector transmission data；The traffic lights main controller Including antenna, electronic label reader, controller, traffic lights drive module, communication module and camera, the electronic tag is read Device, traffic lights drive module, communication module and camera is read to connect with controller；The electronic tag passes through antenna and electronics Label reader connection, the ground induction coil detector are connect with controller；The communication module wirelessly with it is upper Machine connection.

The camera uses OV7670 camera as a preferred technical solution,.

The communication module uses WIFI communication module as a preferred technical solution,.

The controller uses the controller of STM32 series monolithic as a preferred technical solution,.

The electronic label reader is the signal receiver using RFID system as a preferred technical solution,.

The electronic tag is the signal transmitter using RFID system as a preferred technical solution, including coupling member Part and chip.

The ground induction coil detector includes toroidal coil sensors and single-chip microcontroller as a preferred technical solution, described Toroidal coil sensors are the sensor based on electromagnetic induction principle, and are connected with operating current, and the single-chip microcontroller passes through in outside Disconnected pin is connected with sensor.

As a preferred technical solution, in the single-chip microcontroller each the RXD of sub- single machine unit corresponding with sensor with TXD, which intersects, to be connected, and communicates with each other each sub- single machine unit directly, then each sub- single machine unit converges the data of collection It is always handled to single-chip microcontroller, then re-sends to STM32 controller.

The information of RFID passes between the electronic tag, electronic label reader and antenna as a preferred technical solution, Defeated receive uses NRF24L01 wireless transceiver.

As a preferred technical solution, the NRF24L01 wireless transceiver include frequency generator, it is enhanced " ShockBurst " mode controller, power amplifier, crystal oscillator, modulator and demodulator.

The utility model compared with prior art, is had the following advantages and beneficial effects:

(1) the node vehicle flowrate at the crossings such as traffic that the utility model can acquire intelligently adjusts the green letter of traffic lights Than the phenomenon that improving the efficiency of traffic control, can effectively alleviate traffic congestion.

(2) the utility model combines RFID wireless radio-frequency, can efficiently and quickly detect emergency vehicles By, and optimal path is planned for it, while adjusting the split of traffic lights, so that emergency vehicles is passed through crossing as early as possible.

(3) the utility model is communicated by WIFI communication module with host computer, while observing road conditions by camera, is improved The automation of traffic light control and decision it is comprehensive.

(4) the utility model uses the technical solutions such as RFID less radio-frequency, WIFI, camera, solves emergency vehicles Vehicle flowrate monitoring, traffic lights split are adjusted, and the technical problems such as emergency vehicles route planning have reached emergency vehicles and understood in real time Road conditions, traffic lights intelligently adjust split, the technical effect that emergency vehicles rood to optimal route is planned.

Detailed description of the invention

Fig. 1 is the overall system architecture block diagram of the utility model,

Fig. 2 is the RFID wireless transmission circuit figure of the utility model

Specific embodiment

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.

As shown in Figure 1, the intelligent traffic light node control system of the present embodiment, including ground induction coil detector, electronics mark Label, traffic lights main controller and host computer.

The traffic lights main controller include electronic label reader, antenna, STM32 controller, traffic lights drive module, WIFI communication module and OV7670 camera, the electronic label reader, traffic lights drive module, WIFI communication module and OV7670 camera is connect with STM32 controller, and the ground induction coil detector is connect with STM32 controller, the WIFI Communication module is wirelessly connect with host computer.Traffic lights main controller is for receiving and processing electronic tag or ground induction coil Detector transmits data.

The electronic label reader belongs to the signal receiver of RFID system, and the electronic tag passes through antenna and electronics Label reader connection, the terminal that electronic label reader is acquired as data, can with reading and writing electronic labeling information, provide and Approach, the control of offer signal condition, parity error checking and more orthofunction that electronic tag carries out data transmission etc..

The antenna is to provide the equipment of radiofrequency signal spatial for electronic tag and reader.

STM32F103ZET6 of the traffic lights drive module based on Cortex-M3 kernel is main control chip, controls traffic The circulation of lamp is lighted, using the countdown display lamp bright time.

The WIFI communication module is connected with STM32 controller chip by SPI interface, and the star centered on AP is constructed Network and AdHoc mode etc. to network.

The OV7670 camera be with new edition wide power OV7670 (AL422+OV7670) image capture module, STM32 controller directly passes through serial camera control bus marco output frame, sub- acquisition, the operation such as take window.

For the ground induction coil detector for the variation of detection coil frequency of oscillation and statistical vehicle flowrate, structure includes toroid Coil sensor and single-chip microcontroller, the toroidal coil sensors are the sensor based on electromagnetic induction principle, and are connected with certain work Electric current.Single-chip microcontroller is connected one by one by external interrupt pin with sensor, each sub- monolithic corresponding with sensor in single-chip microcontroller The RXD of machine unit intersects with TXD to be connected, and communicates with each other each sub- single machine unit directly, then each sub- single machine unit The data summarization of collection is handled to single-chip microcontroller, then re-sends to STM32 controller.The electronic tag is for storing The transmission information for needing to identify, including coupling element and chip, each electronic tag have unique electronic code, are attached to object Target object is identified on body.

As shown in Fig. 2, forming RFID wireless transmission circuit by electronic tag, electronic label reader and antenna etc..At this Information in wireless transmission circuit using NRF24L01 wireless transceiver as RFID transmits received carrier.Wireless transceiver is By frequency generator, enhanced " ShockBurst " mode controller, power amplifier, crystal oscillator, modulator and demodulation The composition such as device.In actual disposition, output power channel selection and agreement are configured by SPI interface.Pass through software Be arranged (program part applied to be the prior art, this part is not innovated) working frequency, mailing address, transmission rate and Data packet length, data packet can transmit the data of 1~32Byte every time.NRF24L01 has extremely low current drain special simultaneously Point, when transmission power is 0dBm in the transmission mode for work, current drain is 11.3mA, and when reception pattern is 12.3mA, power down Only 900nA under mode and standby mode, so that NRF24L01 cruise duration is extended, so that emergency vehicles can be for a long time to outgoing Send valid data, it is ensured that emergency traffic scheduling is responded in time.

The intelligent traffic light node control system of the present embodiment is applied of both having, first is that quick when there is emergency vehicles to need Application when current；Second is that controlling when vehicle flowrate is too big traffic lights；Above-mentioned both sides application is done briefly below Introduction (conventional software that the software being related to is this field):

(1) application when there is emergency vehicles to need fast passing.

When the emergency vehicles for carrying electronic tag come intersection, electronic label reader information warp to be sent Load is sent out in the carrier signal of a certain frequency through antenna after coding, and the electronic tag into reader working region connects This pulse signal is received, the related circuit in the chip in electronic tag is modulated this signal, decodes, decrypts, then to life Request, password, permission etc. is enabled to be judged (program part applied to as the prior art, do not innovate to this part).If Read command, control logic circuit are then read from memory for information about, by electronic tag after encrypted, coding, modulation Antenna is then forwarded to reader, reader demodulates the signal received, decoded, decrypt after send to STM32 main control chip Carry out related data processing；If being judged, its corresponding password and permission are not inconsistent, and return to error message.STM32 controller is logical It crosses WIFI communication module and received emergency vehicles information is transmitted to host computer, host computer plans the best road arrived at the destination Diameter, and optimal path planning is transmitted to emergency vehicles by GPRS, and adjust by crossing traffic light signals, make to meet an urgent need Vehicle is reached most preferably by the split at crossing, meanwhile, signal, which is controlled, by WIFI passes traffic lights main controller, traffic lights master control back Device receives the signal control traffic lights drive module passed back, adjusts belisha beacon state and time, makes emergency vehicles as early as possible Pass through crossing.

(2) when vehicle flowrate is too big, application that traffic lights is controlled.

When vehicle flowrate is larger, when vehicle is by crossing, it is embedded between the loop coil and driving vehicle under road surface and passes through What electromagnetic field was coupled.When vehicle passes through loop coil and is in certain position, cause to be vortexed in car body, and vortex is also right Loop coil has a certain impact, and there is certain mutual inductance between vehicle and loop coil, inductance is made to change, thus Cause the change of frequency of oscillation.Single-chip microcontroller is interrupted by external terminal and the Interruption of timer matches, timing acquiring Data obtain current frequency, and according to the sensitivity currently set and working method requirement, then compared with reference frequency, to sentence It is disconnected whether to have vehicle arrival, while being communicated with STM32 controller, data are transmitted to STM32 controller, and be stored in memory It is interior.Traffic lights main controller passes through WIFI communication module again and transfers data to host computer.The wagon flow that host computer passes through each crossing Amount data obtain the Optimal green signal ratio of traffic intersection at this time, and generate traffic light control signal.Host computer will be handed over by WIFI Logical lamp control signal is returned to traffic lights main controller, to control traffic lights drive module, adjust belisha beacon state and Time improves rate of the wagon flow by crossing.

The traffic lights main controller can directly pass through serial camera control bus (Serial Camera Control Bus, SCCB) the current crossing realtime graphic of control OV7670 camera operation acquisition, traffic intersection is further well understood Situation, to make more reasonable decision.

Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by above-mentioned The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.

Claims (10)

1. a kind of intelligent traffic light node control system, including host computer, which is characterized in that further include needing to identify for storing Transmit the electronic tag of information, for the ground induction coil detector and use of the variation of detection coil frequency of oscillation and statistical vehicle flowrate In the traffic lights main controller for receiving and processing electronic tag or ground induction coil detector transmission data；The traffic lights main controller packet Antenna, electronic label reader, controller, traffic lights drive module, communication module and camera are included, the electronic tag is read Device, traffic lights drive module, communication module and camera are connect with controller；The electronic tag passes through antenna and electronics mark Reader connection is signed, the ground induction coil detector is connect with controller；The communication module wirelessly with host computer Connection.

2. intelligent traffic light node control system according to claim 1, which is characterized in that the camera uses OV7670 camera.

3. intelligent traffic light node control system according to claim 1, which is characterized in that the communication module uses WIFI communication module.

4. intelligent traffic light node control system according to claim 1, which is characterized in that the controller uses The controller of STM32 series monolithic.

5. intelligent traffic light node control system according to claim 1, which is characterized in that the electronic label reader It is the signal receiver using RFID system.

6. intelligent traffic light node control system according to claim 1, which is characterized in that the electronic tag be using The signal transmitter of RFID system, including coupling element and chip.

7. intelligent traffic light node control system described in -6 any one according to claim 1 describedly, which is characterized in that feel Coil checker includes toroidal coil sensors and single-chip microcontroller, and the toroidal coil sensors are the biography based on electromagnetic induction principle Sensor, and it is connected with operating current, the single-chip microcontroller is connected by external interrupt pin with sensor.

8. intelligent traffic light node control system according to claim 7, which is characterized in that in the single-chip microcontroller each with The RXD of the corresponding sub- single machine unit of sensor intersects with TXD to be connected, and communicates with each other each sub- single machine unit directly, so Each sub- single machine unit handles the data summarization of collection to single-chip microcontroller afterwards, then re-sends to STM32 controller.

9. intelligent traffic light node control system according to claim 1, which is characterized in that the electronic tag, electronics The information transmission of RFID, which receives, between label reader and antenna uses NRF24L01 wireless transceiver.

10. intelligent traffic light node control system according to claim 9, which is characterized in that the NRF24L01 is wireless Transceiver includes frequency generator, enhanced " ShockBurst " mode controller, power amplifier, crystal oscillator, modulation Device and demodulator.