CN205283736U

CN205283736U - Embedded portable multi -functional image acquisition system based on ARM

Info

Publication number: CN205283736U
Application number: CN201620012886.6U
Authority: CN
Inventors: 何学明; 胡静; 刘亚雷; 赵树培
Original assignee: CHINA MARITIME POLICE ACADEMY
Current assignee: CHINA MARITIME POLICE ACADEMY
Priority date: 2016-01-06
Filing date: 2016-01-06
Publication date: 2016-06-01
Anticipated expiration: 2026-01-06

Abstract

The utility model relates to an embedded portable multi -functional image acquisition system based on ARM, including following module: image gathering module is equipped with interface circuit, links to each other with data processing module, gathers the image after the buffer transmits to data processing module, ARM data processing module reads the data that image gathering module sent, last USB commentaries on classics serial circuits, reset circuit, LCD interface circuit and the crystal oscillator circuit of still being equipped with of data processing module through the SCCB bus, the display module, it is continuous with data processing module's LCD interface circuit for real -time display image data, storage module links to each other with data processing module, the image information of storage behind data processing, power module is for above -mentioned each module power supply. The utility model discloses the advantage embodies: hardware circuit is succinct, and software programming is easy, and clear smoothness is gathered in real time to the different environment hypograph, simultaneously small, the consumption is little, with low costs, this image acquisition technique can further expand the utilization moreover, has higher practical value.

Description

A kind of portable embedded formula multifunctional image acquisition system based on ARM

Technical field

The utility model relates to a kind of image capturing system, is specifically related to a kind of portable embedded formula multifunctional image acquisition system based on ARM.

Background technology

At present, there is very big technological gap in the image collection of public security active components under the low visibility such as fire-fighting domain dense smoke, water smoke and Complex water body environment etc., the technology application of this respect has very big development prospect.

Along with social environment and outside atmosphere are day by day complicated, public security active components need powerful technical support fire control and disaster rescue, under water supervision, water-bed search and rescue in salvaging, boats and ships maintenance etc. The acquisition technology that native system relates to, is widely used in the monitoring etc. of peripheral environment not only in the maintenance of fire-fighting fire extinguishing, pipeline, monitor and play great function in navigation, ocean defence etc. under water equally as the acquisition process mode of a kind of data. Therefore, research and develop portable multi-function image capturing system and all seem extremely urgent from current demand or development prospect aspect.

Traditional ccd image acquisition system speed is slow, function singleness, power consumption are big, bulky, can not meet diversification day by day, complicated image collection and show needs in real time, especially at the needs of some emerging Application Areass (under such as the low visibility environment such as dense smoke, water smoke object identification, under water image show in real time, intelligent monitoring, under water trouble shooting etc.).

Practical novel content

The purpose of this utility model is for deficiency of the prior art, it is provided that a kind of portable embedded formula multifunctional image acquisition system based on ARM.

For achieving the above object, the utility model discloses following technical scheme:

Based on a portable embedded formula multifunctional image acquisition system of ARM, comprise such as lower module:

Image capture module, is cmos image sensor, is provided with interface circuit, be connected with data processing module, transfers to data processing module through buffer memory device after gathering image;

ARM data processing module, for STM32F103ZET6 micro-chip, the data sent by SCCB bus reading images acquisition module, are sent to display module after treatment, data processing module are also provided with USB and turn serial port circuit, reset circuit, LCD interface circuit and crystal oscillator circuit;

Display module is LCD liquid crystal display screen, is connected with the LCD interface circuit of data processing module, for showing view data in real time;

Memory module, is connected with data processing module, stores the graphic information after data processing;

Power supply module is above-mentioned each module for power supply.

Further, described image capture module is the OV7670 camera module of band FIFO buffer memory device.

Further, described FIFO buffer memory type number is AL422B.

Further, described camera module adopts the cylindrical encapsulation of titanium dark fund material, and whole camera section diameter is 60mm, and length is 100mm.

Further, described camera edge adopts 888 transparent glues to realize the sealing of environment under water.

Further, described camera selects the White LED photodiode of 33 high brightness as light source, and they is evenly embedded in OV7670 camera sensing device camera lens front end, circumferentially uniform two weeks.

Further, described camera utilizes the trip switch of many grades of positions to select the resistance access circuit realization of different resistance to be controlled by the lamplight brightness of 33 LEDs photodiodes, meets image collection to the light demand of different environment.

Further, described data processing module being also provided with JTAG and debugs interface, JTAG debugs interface and connects debug circuit.

Further, described memory module is SD card.

A kind of portable embedded formula multifunctional image acquisition system based on ARM disclosed in the utility model, has following useful effect:

Utilize STM32 micro-chip to the fast throughput of view data, well meet the real-time display requirements of image, whole system has very strong versatility and extendability simultaneously, the image collection and monitor demand of different occasion can be met by update routine and the different interface of configuration, the maintenance of fire control and disaster rescue, marine police vessel underwater pipeline and naval vessels body, environment automatic monitoring, under water search and rescue salvaging etc. a lot of in have important application.

Whole system is by image capture module, power supply, PC, several leading part of making a video recording is formed, by embedded imaging system has been carried out dense smoke respectively, the low visibilities such as naked light, different light, different objects shape and the collection experiment under different water body environment and experimental analysis, show that this image capturing system is reasonable in design, hardware circuit is succinct, software programming is easy, different environment hypograph gathers clear and smooth in real time, demonstrate the reliability of system, volume is little simultaneously, power consumption is little, cost is low, reach design requirements, this acquisition technology can further expand utilization simultaneously, there is higher practical value.

Accompanying drawing explanation

Fig. 1 is connection diagram of the present utility model;

Fig. 2 is Power supply partial circuit diagram;

Fig. 3 is reset schematic circuit;

Fig. 4 is LCD interface circuit figure;

Fig. 5 is that USB turns serial port circuit figure;

Fig. 6 is camera module interface circuit figure;

Fig. 7 is camera and LED photodiode arrangement schematic diagram;

Wherein:

1-camera 2-photodiode

Embodiment

Also with reference to accompanying drawing, the utility model is further described below in conjunction with embodiment.

See Fig. 1. Based on a portable embedded formula multifunctional image acquisition system of ARM, comprise such as lower module:

Power supply module is above-mentioned each module for power supply.

In the present embodiment, described image capture module is the OV7670 camera module of band FIFO buffer memory device, and described FIFO buffer memory type number is AL422B.

In the present embodiment, it is contemplated that gathering the requirement of system soundness and preservative property to portable multi-function image, described camera module adopts the cylindrical encapsulation of titanium dark fund material, and whole camera section diameter is 60mm, and length is 100mm. In order to the sealing realized under peripheral environment, camera 1 edge adopts 888 transparent glues to solve the problem of underwater sealings. Camera selects the White LED photodiode 2 of 33 high brightness as light source, and they are evenly embedded in OV7670 camera sensing device camera lens front end, circumferentially uniform two weeks (see Fig. 7). Camera 1 utilizes the trip switch of many grades of positions to select the resistance access circuit realization of different resistance to be controlled by the lamplight brightness of 33 LEDs photodiodes 2, meets image collection to the light demand of different environment.

In the present embodiment, described data processing module being also provided with JTAG and debugs interface, JTAG debugs interface and connects debug circuit.

In the present embodiment, described memory module is SD card.

In order to handled easily, whole system design is that external source is powered, beat control panel simultaneously and control power supply, surface strip master switch, rotary light switch, camera control interface, signal light control interface and power input interface, by 220V alternating-current turn 12V direct current transmodulator realize STM32, camera, LED lamplight confession electrical integrated. The power supply of whole system is controlled by 4 supply leads, comprises 18 camera signals lines and two LED lamplight control lines.

In the utility model, original signal is after treater, and point G and BR two-way enters the A/D converter of 10, and A/D converter is operated in 12Mhz frequency, synchronous with dot frequency.

See Fig. 2. Total U16, U17 and U19 tri-voltage stabilizing chips in Fig. 2, DC_IN is used for direct supply input, is converted to 5V power supply through U17 direct current conversion chip and exports, and D4 is anti-reverse diode, avoids external dc electric power polarity wrong and burns out micro-chip. K1 is power supply master switch, and F1 is 500ma safety fuse, for the protection of power supply. U16 is 3.3V voltage stabilizing chip, is used to provide 3.3V voltage stabilized source, and U19 is then 1.8V voltage stabilizing chip.

See Fig. 3. The circuit of design is that lower level resets, and keeps synchronous with micro-chip, R32 and C51 constitutes electrification reset circuit. Meanwhile, the reset pin of TFT-LCD is also connected on RESET button, it is possible to reset micro-chip and TFT-LCD simultaneously, reduces the use of I/O mouth.

See Fig. 4. In Fig. 4, TFT-LCD is a general Liquid Crystal Module interface, and TFT-LCD module is connected with FSMC interface simultaneously, significantly improves brush screen speed. T_MISO/T_MOSI/T_PEN/T_CS/T_SCK in Fig. 3 is used for realizing the control to liquid crystal touch screen. LCD_BL then controls the backlight of LCD.

See Fig. 5. USB turns serial port circuit schematic diagram as shown in Figure 5. The utility model USB turns serial ports and selects CH340G chip. In figure, the combination of Q2 and Q3 constitutes a key download circuit of development board, it is only necessary at mcuisp software design patterns: the lower level of DTR resets, and RTS high level enters BootLoader. Wherein, BOOTO is then the BO signal of start-up mode. USB_232 provides the CH340G interface communicated with computer, can provide power supply to micro-chip simultaneously, downloads what code was mainly realized by USB_232 interface to micro-chip.

See Fig. 6. In figure, P8 is that interface can be used for connecting OV7670 camera module. Wherein, OV_SCL, OV_SDA, these 5 signals of FIFO_WRST, FIFO_RRST, FIFO_OE are the PD3 being connected to MCU, PG13, PD6, PG14, above PG15, OV_DO��OV_D7 is then connected to and (is placed on continuous print IO, it is possible to improve read-write efficiency) above PCO��7, these 3 signals of FIFO_RCLK, FIFO_WEN, OV_VSYNC are the PB4 being connected to MCU, above PB3, PA8.

The workflow of whole OV7670 is: utilize I2C control bus carry out the initialize of register and completed the initialize of TFT-LCD liquid crystal display by FSMC controller, transfer is through SCCB interface, after initial work completes, by upper computer software mcuisp, the driving program of image collection is loaded in Cortex-M3 processor cores, run by camera application programs, on the TFT-LCD liquid crystal display of 2.8 cun, just can show the view data of collection like this. Image resolution rate is 320*240, and image is stored in the Jin Shidun SD card of 32G. Can be checked by PC.

The above is only preferred implementation of the present utility model; should be understood that; for the those of ordinary skill of this area; do not departing under prerequisite of the present utility model; the some improvement that the utility model can also be made and supplementing; these improve and supplement, and also should be considered as protection domain of the present utility model.

Claims

1. the portable embedded formula multifunctional image acquisition system based on ARM, it is characterised in that, comprise such as lower module:

Power supply module is above-mentioned each module for power supply.

2. a kind of portable embedded formula multifunctional image acquisition system based on ARM according to claim 1, it is characterised in that, described image capture module is the OV7670 camera module of band FIFO buffer memory device.

3. a kind of portable embedded formula multifunctional image acquisition system based on ARM according to claim 2, it is characterised in that, described FIFO buffer memory type number is AL422B.

4. a kind of portable embedded formula multifunctional image acquisition system based on ARM according to claim 3, it is characterised in that, described camera module adopts the cylindrical encapsulation of titanium dark fund material, and whole camera section diameter is 60mm, and length is 100mm.

5. a kind of portable embedded formula multifunctional image acquisition system based on ARM according to claim 4, it is characterised in that, described camera edge adopts 888 transparent glues to realize the sealing of environment under water.

6. a kind of portable embedded formula multifunctional image acquisition system based on ARM according to claim 5, it is characterized in that, described camera selects the White LED photodiode of 33 high brightness as light source, and they are evenly embedded in OV7670 camera sensing device camera lens front end, circumferentially uniform two weeks.

7. a kind of portable embedded formula multifunctional image acquisition system based on ARM according to claim 6, it is characterized in that, described camera utilizes the trip switch of many grades of positions to select the resistance access circuit realization of different resistance to be controlled by the lamplight brightness of 33 LEDs photodiodes, meets image collection to the light demand of different environment.

8. a kind of portable embedded formula multifunctional image acquisition system based on ARM according to claim 1, it is characterised in that, described data processing module is also provided with JTAG and debugs interface, JTAG debugs interface and connects debug circuit.

9. a kind of portable embedded formula multifunctional image acquisition system based on ARM according to claim 1, it is characterised in that, described memory module is SD card.