【正文】 tions information collection point, the host system without the need for hardware Any changes. The entire system is a mainframe puter system and several subponents, submachine between the host and use of wireless munications technology for data transmission. Completion of information collection point for the signal acquisition and A / D converter, and other functions, and the n through a wireless data munication transmission to the host. Host system can be adopted by default and sent to the keyboard input of machines, with each submachine into the collection of data, the judge handling, the results will be sent to the LCD display and alarm handling. With the development of the architecture industry in recent years, tower cranes are offered the best opportunities for developing which they have never met. But when the number of tower cranes increases rapidly, the number of the tower cranes accidents also increases in large quantity. Reduce the tower crane accidents, improve safety performance and tower crane operating efficiency imminent. To this end to a sensor technology, puter technology and measurement and control technology, research and development of statetower realtime monitoring system to make it more secure, more efficient and more smooth operation. Completion of the tower crane Intelligent Computer Monitoring System for Analysis and Research, the software and hardware design. To control the puter industry as the core, the use of video surveillance technology, through the CRT, on the one hand to form images broadcast tower crane working process on the other hand, in digital form dynamic display tower crane operating parameters. So that the driver did not see the window, but also know that tower crane working conditions and operating trends. Against institutions or from the tower crane operation, the existence of mechanical impact, and low efficiency of the shortings, the paper proposed the use of fuzzy control method, frequency converter to change or bodies from the frequency of electrical power, thereby regulating the main hook speed, and tower crane hoisting mechanism smooth Acceleration and deceleration, to overe the vicious impact of mechanical transmission, raising the tower crane life and 7 work efficiency. In addition, the plexity of the tower crane system, in order to promptly identify defective devices or modules, so that timely replacement of the good ponents then need the system fault diagnosis. Stability of the Jackup Equipment and Safe Protection Systematic Application Study Comparing with safe performance of foreign advanced engineering machinery product, ours is bad in performance, low in automation intelligent degree and high rate in crash accident. So crane is selected as an reseearch object to reasearch its safe system and automation intelligence, which is used largely in construction. Through the first factor affecting the stability of the theoretical analysis with reference to advanced foreign technology, the Chinese crane equipment security system torque limiter of the overall plan was discussed, used to determine the number of microcontroller as the core simulation control And secondly on the design of the hardware to do a detailed exposition, including access to the former, after the channel, the smallest system and its external expansion, the watchdog circuit and manmachine munication, such as determining the parameters of choice and ponents, and pleted Torque limiter functions of the software system to achieve and to improve antijamming measures to be taken by the hardware and software。 1 中文 6240 字 The Use and History of Crane Every time we see a crane in action we remains without words, these machines are sometimes really huge, taking up tons of material hundreds of meters in height. We watch with amazement and a bit of terror, thinking about what would happen if the load es off or if the movement of the crane was wrong. It is a really fascinating system, surprising both adults and children. These are especially tower cranes, but in reality there are plenty of types and they are in use for centuries. The cranes are formed by one or more machines used to create a mechanical advantage and thus move large loads. Cranes are equipped with a winder, a wire rope or chain and sheaves that can be used both to lift and lower materials and to move the m horizontally. It uses one or more simple machines to create mechanical advantage and thus move loads beyond the normal capability of a human. Cranes are monly employed in the transport industry for the loading and unloading of freight, in the construction industry for the movement of materials and in the manufacturing industry for the assembling of heavy equipment. Crane is the modernization of the production process essential tool, but also reasonable production indispensable for production equipment. Production safety and reduce accidents more prominent with the scale of production expansion, the automaticity enhancement, took the material transporting important equipment the hoist crane applies in the modernization production process more and more broadly, the function is increasingly big, more and more is also high to the hoist crane request, the science and technology rapid development, impelled the modern design and the manufacturing capacity enhancement, the intense international market petition also more and more relies on the technical all urge the hoist crane the technical performance to enter the brandnew development phase, the hoist crane is experiencing a huge . Construction of tower cranes as a symbol of the important and major transport machinery, in the construction industry has been widely used. Its work is characterized, in accordance with construction materials in great need of space within the takeoff and landing and handling, is a