Design Of Electrical Pan-Tilt Controller Based On ARM11

With the advancement of technology and social improvement of living standards, the video surveillance equipment is widely distributed around us in the public places, and the requirements of the security system are also more and more high. Video surveillance system is moving towards digital, integration, integrated and networked direction.Surveillance system for front-end equipment mainly refers to the PTZ and camera. The traditional design method is that the PTZ and camera were separated and each has a CPU, lots of connection between the various components. In view of the situation, this paper presents a set of PTZ control, lens parameter control, and video image processing controller design method. It can save the cost of hardware, improve the working efficiency and reliability of the system greatly.This paper according to the present development status of the PTZ controller to determine what the function the system will achieve, then conceive the overall design of the system. This system uses the Samsung S3C6410microprocessor, transplant embedded Linux operating system to design the required drivers, and add to the operating system kernel, as a basis for the electric PTZ controller software design.The hardware design is based on the design of the circuit, determine the circuit module chips. Then, depending on the size of PTZ shape and the position of installation, complete PCB design, component welding and hardware debugging. In order to facilitate users to test the equipment, designed a self-test method, through a simple set of DIP switches, you can start the automatic verification of PTZ functions.The software firstly completes the design of underlying drivers of each device, including the head rotation, tilt and RS485devices. And then this design completes the PTZ camera control, communication protocols and video image processing application designs. Finally, completes the video surveillance of the host computer interface design.Testing the whole system which is divided into modules, including self-test, the head direction of rotation, the lens parameter adjustment, serial communications, and video real-time display. The results show that the various parts of the system have been scheduled to achieve the desired effect.