CN204559779U

CN204559779U - A kind of vehicle flow detection system based on FPGA

Info

Publication number: CN204559779U
Application number: CN201520292215.5U
Authority: CN
Inventors: 刘紫燕; 罗超; 帅晹
Original assignee: Guizhou University
Current assignee: Guizhou University
Priority date: 2015-05-08
Filing date: 2015-05-08
Publication date: 2015-08-12
Anticipated expiration: 2025-05-08

Abstract

The utility model discloses a kind of vehicle flow detection system based on FPGA, it comprises camera, and camera is connected with FPGA module wire, and FPGA module is connected with SDRAM memory, VGA display and UART wire; The utility model provides and adopts the acquisition process of embedded technology realization to the traffic video image in runway, there is volume little, cost is low, easy for installation, be suitable as very much intelligent transport system device to use, solve prior art and be difficult to reach the problems such as active balance in processing speed, efficiency, cost, development difficulty, energy consumption, volume etc.

Description

A kind of vehicle flow detection system based on FPGA

Technical field

The utility model belongs to electronic control system field, particularly relates to a kind of vehicle flow detection system based on FPGA.

Background technology

The urban transportation cause of China obtains significant progress in recent years, but the infrastructure construction such as road construction, traffic webmaster needs substantial contribution, and the construction period is also long, its speed of development gathering way well below the vehicles.And the density of population of developed regions is large, vehicle per capita owning amount is higher, cause urban transportation traffic congestion traffic jam serious, crossing installation car flow quantity detecting system, vehicle supervision department can be helped to understand the car amount passage situation at each crossing, reasonable arrangement vehicle flows to, relieve traffic congestion in time, alleviate traffic congestion, traffic congestion phenomenon, and detailed data are provided to urban road construction, therefore, vehicle supervision department monitors intersection vehicle flux, thus to the networking control of urban transportation, there is important directive function, urban road construction planning etc. is all had great significance, in order to make to have a good transport and communication network, in crossing condition survey or urban transportation networking control, the main implementation platform of existing vehicle flow detection system has: ARM platform, ARM+DSP platform, DSP platform, it can use pure software or hardware implementing.Simple and cost-saving in order to develop, generally realize most function with software.But these platforms have respective pluses and minuses, existing vehicle flow detection system is difficult to reach active balance in processing speed, efficiency, cost, development difficulty, energy consumption, volume etc.

Utility model content

The technical problems to be solved in the utility model: provide a kind of vehicle flow detection system based on FPGA, is difficult to reach the problems such as active balance in processing speed, efficiency, cost, development difficulty, energy consumption, volume etc. to solve existing vehicle flow detection system.

Technical solutions of the utility model:

Based on a vehicle flow detection system of FPGA, it comprises camera, and camera is connected with FPGA module wire, and FPGA module is connected with SDRAM memory, VGA display and UART wire.

Described FPGA module comprises cmos image acquisition module, cmos image acquisition module is electrically connected with image conversion module, image conversion module is electrically connected with multiport sdram controller, and multiport sdram controller is electrically connected with video processing module, and video processing module is electrically connected with vga controller.

Camera is cmos image sensor.

The beneficial effects of the utility model:

The utility model reads target image by cmos image sensor, image delivered to cmos image acquisition module and be stored in SDRAM memory after format conversion, video processing module and vga controller module read the image information in SDRAM memory by multiport sdram controller, carry out showing and image procossing, FPGA adds up the information of vehicle flowrate in this moment according to processing result image, and classifies to the type of vehicle detected; Compared with existing vehicle flow detection system, the utility model provides and adopts the acquisition process of embedded technology realization to the traffic video image in runway, there is volume little, cost is low, easy for installation, be suitable as very much intelligent transport system device to use, solve prior art and be difficult to reach the problems such as active balance in processing speed, efficiency, cost, development difficulty, energy consumption, volume etc.

accompanying drawing illustrates:

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model FPGA structural representation.

embodiment:

Described FPGA module comprises cmos image acquisition module, cmos image acquisition module is connected with image conversion module Digital Logical Circuits, image conversion module is connected with multiport sdram controller Digital Logical Circuits, multiport sdram controller is connected with video processing module Digital Logical Circuits, and video processing module is connected with vga controller Digital Logical Circuits.

Camera is cmos image sensor.

Asynchronous receiving-transmitting transmitter UART is driven by the UART control module that FPGA is integrated.

FPGA module also comprises I2C transducer.

Camera is cmos image sensor, adopts the TRDB-D5M camera that Terasic company provides.TRDB-D5M camera has 500W pixel, and it is connected by GPIO with FPGA mainboard.Meanwhile, TRDB-D5M camera has I2C interface, can be demarcated by I2C agreement to the inner parameter of this camera and external parameter.In addition, TRDB-D5M imageing sensor is the pel array of 2592H × 1944V, luminous energy effectively can be converted to voltage signal, is equipped with a small amount of control signal, just directly can obtain 10 RGB original image data on the pin of chip.

On-site programmable gate array FPGA adopts altera corp Cyclone III series EP3C10E144C8N chip, and it can compatible multivoltage I/O, and device kernel and I/O power separately.It utilizes the 65nm low-power consumption technique of TSMC, and provides abundant logic, memory and DSP function.EP3C10E144C8N contains 120K logical block (LEs), and 288 Digital Signal Processing (DSP) multipliers, memory reaches 4Mbits, is very beneficial for the structure of system.

The requirement of vedio data in display buffer according to display timing generator, mainly in order to produce the control signal of VGA display, outputs on display by VGA controller.

Claims

1. based on a vehicle flow detection system of FPGA, it comprises camera, it is characterized in that: camera is connected with FPGA module wire, and FPGA module is connected with SDRAM memory, VGA display and UART wire.

2. a kind of vehicle flow detection system based on FPGA according to claim 1, it is characterized in that: described FPGA module comprises cmos image acquisition module, cmos image acquisition module is electrically connected with image conversion module, image conversion module is electrically connected with multiport sdram controller, multiport sdram controller is electrically connected with video processing module, and video processing module is electrically connected with vga controller.

3. a kind of vehicle flow detection system based on FPGA according to claim 1, is characterized in that: camera is cmos image sensor.