CN203289563U

CN203289563U - STM32 chip based image acquisition and wireless transmission system

Info

Publication number: CN203289563U
Application number: CN2013202843506U
Authority: CN
Inventors: 田景熙; 杨勇; 杨建中
Original assignee: NANJING ZHONGWANG INFORMATION TECHNOLOGY Co Ltd
Current assignee: NANJING ZHONGWANG INFORMATION TECHNOLOGY Co Ltd
Priority date: 2013-05-23
Filing date: 2013-05-23
Publication date: 2013-11-13
Anticipated expiration: 2023-05-23

Abstract

The utility model discloses an STM32 chip based image acquisition and wireless transmission system which comprises a camera, a control mainboard, an SP3232 integrated block, an STM32 chip, a GPRS (General Packet Radio Service) module and a public network server. The camera is connected with the control mainboard, the control mainboard comprises the SP3232 integrated block and the STM32 chip, and the control mainboard is connected with the GPRS module; the GPRS module is connected with the public network server; and the STM32 chip controls connection of a control serial port with the camera. 232 level generated by image acquisition of the camera is converted into TTL level via the SP3232 integrated block, the STM32 chip acquires the TTL level and compresses and packs data of the TTL level, and the compressed and packed data is transmitted wirelessly to the network server via the GPRS module. The STM32 chip based image acquisition and wireless transmission system of the utility model is low in cost, small in volume, convenient in laying and stable in operation; overcomes the problems including difficulty in on-site environmental reconstruction, high laying cost and server condition; and provides a solution for on-site image acquisition and remote wireless image transmission.

Description

A kind of IMAQ based on the STM32 chip and wireless transmitting system

Technical field

Present case belongs to the Remote Monitoring Technology field, relates in particular to a kind of IMAQ based on the STM32 chip and wireless transmitting system.

Background technology

Along with developing rapidly of network and the communication technology, remote supervision system has very important meaning in industrial control field.At industrial control field, because the zone that needs are monitored is wide, the object of monitoring is of a great variety, needs a large amount of man power and material of cost, moreover,, in the local image data of many inclement conditions or the difficult stop that arrives or can not be permanent of people, be very inconvenient.So in this case, the present invention uses STM32 chip controls serial ports to be connected with the peripheral hardware camera.Mainboard includes the SP3232 chip, from camera out image 232 level conversion just can transfer 232 level to Transistor-Transistor Logic level through the SP3232 of mainboards, after the STM32 chip collects Transistor-Transistor Logic level, it is carried out the data compression packing it is wirelessly transmitted to public network server by GPRS, have sizable advantage.Have the characteristics such as cost is low, volume is little, laying is convenient, stable, overcome site environment transformation difficulty, wiring cost is high, the problems such as inclement condition, for the monitoring of on-the-spot object has proposed a solution.As seen built-in applied system and wireless communication technology being combined is the inexorable trend of following Embedded Application.

Summary of the invention

The object of the present invention is to provide a kind of IMAQ and wireless transmitting system of STM32 chip, the guarded region that is intended to solve industrial control field is wide, the monitored object kind is many, spend people under a large amount of manpower and materials and mal-condition be difficult for image data problem.

Present case is to realize like this, a kind of IMAQ of STM32 chip and wireless transmitting system, IMAQ and the wireless transmitting system of described STM32 chip comprise: camera, control mainboard, SP3232 integrated package, STM32 chip, GPRS module and public network server.

Camera connects controls mainboard; Control mainboard and include SP3232 integrated package and STM32 chip; Control mainboard and connect the GPRS module; The GPRS module connects public network server;

STM32 chip controls serial ports is connected with camera; 232 level that the camera collection image produces just can transfer 232 level to Transistor-Transistor Logic level through the conversion of SP3232 integrated package; After the STM32 chip collects Transistor-Transistor Logic level, after it is carried out the data compression packing, by the GPRS module, be wirelessly transmitted to public network server.

Further, the type of described camera is suitable.Dissimilar camera has suitable environment separately, and it has very large difference on parameter and function, selects improper meeting to have a strong impact on the accuracy of image data.

Further, described integrated package SP3232 can transfer the RS232 high level to the TTL low level.

Further, described GPRS module can realize wireless transmission function.

A kind of IMAQ based on the STM32 chip of this practical design and wireless transmitting system, have the characteristics such as cost is low, volume is little, laying is convenient, stable, overcome site environment transformation difficulty, wiring cost is high, the problems such as inclement condition, for the proposition of the collection of image scene and remote image wireless transmission a solution.

Description of drawings

The IMAQ of a kind of STM32 chip that Fig. 1 present case provides and wireless transmitting system theory diagram;

In Fig. 1,1, camera 2, control mainboard 3, SP3232 integrated package 4, STM32 chip 5, GPRS module 6, public network server

The interface circuit schematic diagram of camera and STM32 chip in the IMAQ of a kind of STM32 chip that Fig. 2 present case provides and wireless transmitting system;

In Fig. 2,7, the NAND gate chip; 8, AL422B frame buffer

The control software workflow figure of the IMAQ of a kind of STM32 chip that Fig. 3 present case provides and wireless transmitting system

Embodiment

, in order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.

Fig. 1 has shown a kind of based on the IMAQ of STM32 chip and the theory diagram of wireless transmitting system that present case provides.For convenience of explanation, only show the part relevant to present case.

As shown in Figure 1, present case is achieved in that a kind of IMAQ based on the STM32 chip and wireless transmitting system, and this system comprises camera 1, controls mainboard 2, SP3232 integrated package 3, STM32 chip 4, GPRS module 5 and public network server 6.

Camera 1 connects controls mainboard 2; Control mainboard 2 and include SP3232 integrated package 3 and STM32 chip 4; Control mainboard 2 and connect GPRS module 5; GPRS module 5 connects public network server 6;

STM32 chip 4 is controlled serial ports and is connected with camera 1; The conversion that camera 1 gathers 232 level process SP3232 integrated packages 3 of image generation just can transfer 232 level to Transistor-Transistor Logic level; After STM32 chip 4 collects Transistor-Transistor Logic level, after it is carried out the data compression packing, by GPRS module 5, be wirelessly transmitted to public network server 6.

As shown in Figure 2, in the interface circuit schematic diagram of camera 1 and STM32 chip 4:

Further, the image acquisition circuit of camera 1 adopts the active crystal oscillator of 24MHz to provide system clock for OV7670.

Further,, in order to solve message transmission rate inconsistence problems between microprocessor and camera 1, add a slice AL422B frame buffer 8 between both, will give again microprocessor after the view data buffer memory of camera collection.

Further, for realizing automatically depositing the picture signal of OV7670 output in AL422B frame buffer 8, circuit has adopted a slice NAND gate chip 7, in order to produce the sequential of writing that meets 8 requirements of AL422B frame buffer.

Further, the model selected of NAND gate chip 7 is 74HCOO.

It should be noted that because 8 normal operations of AL422B frame buffer need the 3.3V power supply, need SP3232 integrated package 3 that the RS232 high level is transferred to the TTL low level.

Provided as shown in Figure 4 the control software workflow figure of a kind of IMAQ based on the STM32 chip and wireless transmitting system, the control software C language compilation of this system, overall workflow is as follows:

1, power on to monitoring terminal;

2, complete the initialization of each module and open interruption;

3, STM32 chip 4 passes through the data of serial ports 1 receiving sensor, and to data analysis;

4, whether the data of judgement collection are effectively correct;

The data that 5, effectively will receive deposit external memory storage in, and programmed process is extracted required information and is sent to serial ports 2, the invalid interruption entrance that returns simultaneously;

6, STM32 chip 4 Synchronization Control GPRS modules 5 are connected to GPRS network login public network server 6;

7, after logining successfully, program enters major cycle, and monitoring terminal sends data to public network server 6 in real time;

8, STM32 chip 4 can also monitoring network connection automatic according to the feedback information of GPRS module 5, and realizes disconnection reconnecting.

This practical design is based on IMAQ and the wireless transmitting system of STM32 chip, have the characteristics such as cost is low, volume is little, laying is convenient, stable, overcome site environment transformation difficulty, wiring cost is high, the problems such as inclement condition, for the proposition of the collection of image scene and remote image wireless transmission a solution.

The foregoing is only preferred embodiment of the present invention,, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.

Claims

1. the IMAQ based on the STM32 chip and wireless transmitting system, it is characterized in that, described IMAQ based on the STM32 chip and wireless transmitting system comprise: camera, control mainboard, SP3232 integrated package, STM32 chip, GPRS module and public network server;

Camera connects controls mainboard; Control mainboard and include SP3232 integrated package and STM32 chip; Control mainboard and connect the GPRS module; The GPRS module connects public network server; STM32 chip controls serial ports is connected with camera.

2., as claimed in claim 1 based on IMAQ and the wireless transmitting system of STM32 chip, it is characterized in that, the image acquisition circuit of described camera adopts the active crystal oscillator of 24MHz to provide system clock for OV7670.

3., as claimed in claim 1 based on IMAQ and the wireless transmitting system of STM32 chip, it is characterized in that, add a slice AL422B frame buffer between described camera and microprocessor.

4. the IMAQ based on the STM32 chip as claimed in claim 3 and wireless transmitting system, is characterized in that, described AL422B frame buffer normal operation needs the 3.3V power supply.

5. the IMAQ based on the STM32 chip as claimed in claim 3 and wireless transmitting system, is characterized in that, described AL422B frame buffer, circuit have adopted a slice NAND gate chip.

6. the IMAQ based on the STM32 chip as claimed in claim 5 and wireless transmitting system, is characterized in that, the model that described NAND gate chip is selected is 74HCOO.