Design And Implentation Of Integrated Monitoring Analog Zoom Camera

The integrated zoom camera,which is integrated in lens,CCD chip,video processing circuits,control communication circuits,power,chassis,and so on as a whole.This type of cameras can focus,zoom, auto-focus, auto-zoom and auto-iris.Compared with traditional cameras,the integrated zoom cameras are a compact, the special design of appearance, the power, video, control signals are directly jack, also they have more simple connection than traditional cameras. In monitoring areas,the integrated zoom cameras have alreay been widely used.During the graduate studies,we designed and implemented a type of integrated zoom camera which used in monitoring areas.I completed the relevant hardware and software design. The integrated monitoring analog zoom camera which we designed has following features:(1) The zoom camera is based on 47,0000 pixeles CCD and special DSP along with SCM control communications system.This design scheme ensures that the camera has good effect and shorten the R & D cycle also reduced the costs.(2) The auto-focus system is based on analog circuits and MCU.The core of design zoom camera is how to auto-focus. Traditional active focusing system complex and error-prone.The auto-focus system which based on FPGA or DSP is much more expensive. In this paper,the auto-focus system is achieved by analog filtering circuit extraction high-frequency component from the composite video signals. At last,we use hill-climbing algorithm to find the focusal point by MCU. Practice has proved that, this auto-focus system is simple, low-power and fast focusing .The zoom camera in which used the auto-focus system can focus in one second and the correct rate is more than 99%.(3) On screen display. The zoom camera can display the operation information on screen by special characters superimposed chip.(4) Infrared remote control . Using infrared can control the movement of camera and haeundae.(5) Haeundae decoding module is embedded in the zoom camera.The zoom camera need't use an external decoder but by the MCU in the zoom camera to communicate with PC. At the same time, in order to enhance the camera's versatile, we also designed a decoder interface in the camera, so the camera can directly connect with other types of haeundae decoder .(6) Designed the man-machine interface. Users can use man-machine interface to control the camera and haeundae.Also for further design integrated PC monitoring software to lay a foundation.