The Development Of New Generation Infrared Elevator Light Curtain

The21st century as the market globalization and the development of China’s urbanization, the elevator, as the modern high-rise building society indispensable transportation tool, not only for safe and reliable, stable operation, call on accurate, comfortable. Ensure that the elevator door system safety operation, has been an important subject of elevator manufacturing. Mechanical safety shoes is elevator early door protection device, and then the application of infrared electric parts, beginning from the1991s, the micro electronics technology is developing, especially the application of microprocessor MCU, make this kind of non-contact door protection from single point beam development to logic continuous scanning, namely light curtain. Elevator light curtain no mechanical moving parts, and object without contact, reaction sensitive, action quick, easy to conceal, the scope of protection of the great features. Has become the mainstream of the configuration.The elevator door safety protection depends on the screen, but now the elevator light curtain price expensive, maintenance difficulties, producibility is poorer, the purpose of this paper is to develop a new elevator light curtain system, using infrared communication, PC can display the obstacles of the specific height, and save power consumption, low cost, and at the same time, higher sensitivity, better productive.This paper first shows the infrared elevator light curtain system overall structure and its several basic characteristics. Secondly introduces several common data communication protocol, introduces the basic principle of infrared communication and work methods. And gives the system key point, the communication mode, frame structure, etc. Then the paper gives the system hardware and software implementation scheme of the realization of the plan. The system of the main control chip is ATMEL company AVR series chips, including signal receiving and amplification, threshold value of the automatic adjustment, save power consumption, etc. PC software, can detect light interlude obstacles of the specific position.At the end, paper describes the installation steps, and introduces some common test methods and steps.