CN205430479U

CN205430479U - Image acquisition system

Info

Publication number: CN205430479U
Application number: CN201620214545.7U
Authority: CN
Inventors: 李可欣
Original assignee: Hunan Institute of Technology
Current assignee: Hunan Institute of Technology
Priority date: 2016-03-21
Filing date: 2016-03-21
Publication date: 2016-08-03
Anticipated expiration: 2026-03-21

Abstract

The utility model provides an image acquisition system, includes image gathering module and control transmission module, image gathering module includes CMOS image sensor and image acquisition terminal, CMOS image sensor is connected with image acquisition terminal and control transmission module electricity respectively, the image acquisition terminal includes the FPGA module, CMOS image sensor through signal conditioning module with FPGA module electricity is connected, storage module is connected to FPGA module electricity, bus connection control reading module is passed through to the FPGA module, control reading module is passed through USB interface transfer with the data that read and is given the host computer. The utility model discloses high -speed transmission that can the quantity performed certificate to guarantee that data have the real -time, and then realize the quick vision positioning of follow -up accident vehicle.

Description

A kind of image capturing system

Technical field

The utility model relates to acquisition technology field, particularly a kind of image capturing system.

Background technology

In recent years, improve constantly along with China's economy and national life level so that society's vehicle guaranteeding organic quantity is gradually increased, and urban traffic congestion degree is the most serious.The congested in traffic incidence that can promote traffic accident, life security and property to people cause serious threat.Therefore, seek effective ways, traffic accident vehicle is quickly positioned, remove road safety fault in time, become the focus direction of field of traffic control research.But, realize the quick location to traffic accident vehicle, it is necessary for image capturing system to be guaranteed transmission data and there is real-time, to avoid vehicle is positioned in time, thus allowing vehicle escape, this modules being accomplished by image capturing system has data transmission at a high speed when matching.

Utility model content

The purpose of this utility model is to overcome the above-mentioned deficiency of prior art to provide a kind of data transmission bauds fast image capturing system, to guarantee that data have real-time, and then realizes the fast vision location of follow-up vehicle.

The technical solution of the utility model is: a kind of image capturing system, including image capture module and control transport module, described image capture module includes cmos image sensor and IMAQ terminal, and described cmos image sensor electrically connects with IMAQ terminal and control transport module respectively；Described IMAQ terminal includes FPGA module, described cmos image sensor electrically connects with described FPGA module through Signal-regulated kinase, described FPGA module electrical connection memory module, described FPGA module connects monitoring reading module by bus, and the data of reading are transferred to host computer by USB interface by described monitoring reading module.

Further, described control transport module is USB interface chip, and the model of USB interface chip is CY7C68013A chip.

Further, the model of described cmos image sensor is OV7740 imageing sensor.

Further, described CY7C68013A chip is connected with the SCCB bus of OV7740 imageing sensor based on I2C bus, for accessing the register of OV7740 imageing sensor.

Further, described FPGA module connects monitoring reading module by LVDS bus.

Further, described memory module is FLASH chip.

The beneficial effects of the utility model: can complete the high-speed transfer of data, to guarantee that data have real-time, and then realize the fast vision location of follow-up vehicle.

Accompanying drawing explanation

Fig. 1 is the connection diagram of the utility model embodiment CY7C68013A chip and OV7740 imageing sensor；

Fig. 2 is the theory diagram of the utility model embodiment IMAQ terminal.

Detailed description of the invention

Below with reference to Figure of description and specific embodiment, the utility model is described in further details.

A kind of image capturing system, including image capture module and control transport module, described image capture module includes cmos image sensor and IMAQ terminal, and described cmos image sensor electrically connects with IMAQ terminal and control transport module respectively；Described IMAQ terminal includes FPGA module, described cmos image sensor electrically connects with described FPGA module through Signal-regulated kinase, described FPGA module electrical connection memory module, described FPGA module connects monitoring reading module by bus, and the data of reading are transferred to host computer by USB interface by described monitoring reading module.

Specifically, cmos image sensor is for realizing the collection to traffic accident vehicle image, IMAQ terminal is for receiving the vehicle image data in cmos image sensor, and stores image and show, it is achieved the functions such as the TCP/IP data packing transmission of view data；Control transport module for the vehicle view data of acquisition being converted into usb data form, then view data is fed back to host computer carry out associative operation.

Preferably, the control transport module in the present embodiment is USB interface chip, and the model of USB interface chip is CY7C68013A chip；The model of cmos image sensor is OV7740 imageing sensor；Memory module is FLASH chip.Wherein, selected OV7740 imageing sensor is a high performance COMS imageing sensor, contain the single-chip microcomputer that can realize camera function, OV7740 imageing sensor is by management serial camera control bus SCCB, the factor such as image color and tone is processed, and then obtains silent frame or 8/10 bit image forms reduced.Selected CY7C68013A chip can realize the high-speed transfer of data, and this chip is a kind of high speed USB 2.0 chip, and integration USB 2.0 agreement can realize high-speed transfer (480Mb/s), and have the advantages such as massive store function and low-power consumption.Selected FPGA uses the XC3S1400AN of XILINX company, and inside includes abundant RAM resource, it is simple to data acquisition.

The operation principle of the present embodiment is: use the configuration of being correlated with OV7740 imageing sensor of CY7C68013A chip and management.Shown in connection figure Fig. 1 between the two.The PB0:7 end of CY7C68013A chip is connected with the data pin D0:7 end of OV7740 imageing sensor, can complete the transmission of view data.The HREF end of OV7740 imageing sensor and VSYNC end represent that the row of sensor synchronizes and field sync signal respectively, and are connected with the SLWR control bit of CY7C68013A chip and PA0 (interrupting 0) pin respectively.After sensor passes one frame data, CY7C68013A chip interrupt.CY7C68013A chip is connected with the SCCB bus of sensor based on I2C bus, and then the register of access sensors, configures sensor and manages.

The theory diagram of IMAQ terminal sees Fig. 2, FPGA module is by simulation IIC sequential, OV7740 imageing sensor is initialized and configures, and gather view data, it is filtered amplifying by the analog signal of collection by Signal-regulated kinase, and exporting to FPGA module after the signal that conditioning is amplified is carried out A/D conversion, FPGA module is transferred to FLASH chip after the data of reception being cached by internal FIFO and stores.Data in FPGA retaking of a year or grade FLASH chip, are sent to monitor reading module by LVDS bus (model is DS92LV1023), are transferred to host computer by the USB interface of CY7C68013A chip, host computer be decoded showing to image.

This image capturing system, by being only capable of obtaining the two field picture of vehicle with OV7740 imageing sensor, in order to obtain the linear array images of vehicle, devises control transport module.The vehicle image data transformation of acquisition can be become usb data form by this module, then view data feeds back to host computer carries out associative operation.The parameter of OV7740 imageing sensor, by updating register, is configured, then exports 8 bit image brightness values by OV7740 imageing sensor by CY7C68013A chip.Because the fast vision location of native system vehicle to be realized, therefore by data transmission set at a high speed, system should guarantee that data have real-time.

The present embodiment uses OV7740 imageing sensor collection site vehicle image, the vehicle image data in OV7740 imageing sensor are received by the IMAQ terminal that core is FPGA module, and vehicle image stored and shows, utilize CY7C68013A chip that vehicle image data transformation is become usb data form, view data feeds back to host computer again store and manage, thus complete the high-speed transfer of data, to guarantee that data have real-time, and then realize the fast vision location of follow-up vehicle.

Claims

1. an image capturing system, it is characterized in that, including image capture module and control transport module, described image capture module includes cmos image sensor and IMAQ terminal, and described cmos image sensor electrically connects with IMAQ terminal and control transport module respectively；Described IMAQ terminal includes FPGA module, described cmos image sensor electrically connects with described FPGA module through Signal-regulated kinase, described FPGA module electrical connection memory module, described FPGA module connects monitoring reading module by bus, and the data of reading are transferred to host computer by controlling transport module by described monitoring reading module.

Image capturing system the most according to claim 1, it is characterised in that described control transport module is USB interface chip, the model of USB interface chip is CY7C68013A chip.

Image capturing system the most according to claim 2, it is characterised in that the model of described cmos image sensor is OV7740 imageing sensor.

Image capturing system the most according to claim 3, it is characterised in that described CY7C68013A chip is connected with the SCCB bus of OV7740 imageing sensor based on I2C bus, for accessing the register of OV7740 imageing sensor.

5. according to the image capturing system described in any one of claim 1 ~ 4, it is characterised in that described FPGA module connects monitoring reading module by LVDS bus.

6. according to the image capturing system described in any one of claim 1 ~ 4, it is characterised in that described memory module is FLASH chip.