1, intelligent control technology Intelligent control technology includes electro-hydraulic control automatic gear shifting technology, driverless technology, electromechanical integration control technology, etc. The electro-hydraulic control automatic shift system consists of two parts: hydraulic shift control system and electronic shift control system. Electro-hydraulic shift control system has the advantages of compact structure, small volume and light weight, which replaces the more complicated mechanical linkage device. The reliability of shift response is improved. Automatic gear shifting and mechatronics control technology are widely used in construction machinery. Unmanned operation technology is a breakthrough development of mechanical engineering. Unmanned technology in a specific field. For example, in military, surveying and mapping, aerial photography, flammable and explosive areas, high-altitude dangerous work areas, high-risk radiation areas, satellite detection and other fields. Need to use intelligent unmanned mechanical engineering technology. Automatic center unmanned control system, robot operation, GPS navigation, wireless and wired network communication. Driverless car driving and other technologies are all applications of driverless technology in mechanical engineering. Since 1970s, the United States, Britain, Germany and other developed countries began to study driverless cars. China University of National Defense Technology successfully developed the first truly driverless car in China on 1992. In 2005, the first urban driverless car was successfully developed in Shanghai Jiaotong University. At present, driverless technology has made some achievements in the research and product development of driverless technology. However, the development level of unmanned operation technology in China is low, and more efforts are needed to form industrial production.
2. Intelligent monitoring, detection, fault diagnosis and maintenance technology of construction machinery. Foreign scholars have done a lot of research on the fault diagnosis system of construction machinery, and have achieved mature and perfect technical achievements, which are widely used in products. For example, the BORD electronic monitoring system developed by OK Company in Germany can monitor all the important parameters related to the operation and maintenance of hydraulic excavators, check the operating data of excavators with a microprocessor, and quickly monitor, evaluate and display the calculated data. Can identify faults and trends exceeding the limit value, and display alarm information before major accidents occur. Hitachi, Japan has installed an electronic monitoring and fault diagnosis system on ZAXIS series hydraulic excavators. It can detect more than 40 working conditions of excavator in real time, including oil pressure, cooling water temperature, fuel level, hydraulic oil level, air filter blockage, engine speed, hydraulic flow and all electrical system parameters. It also has an alarm function, and can automatically diagnose the faults of the machine through a special detector matched with the machine. The research on fault diagnosis of construction machinery in China started late. But it is developing rapidly. In recent years, many universities and scientific research units have made great progress in the research of fault diagnosis theory and method of construction machinery. For example, the holographic spectrum theory pioneered by scholars of Xi Jiaotong University integrates the amplitude, frequency and phase information of machine vibration. The fault recognition rate is significantly improved. In view of the strong noise background of rolling bearing fault vibration signal and the fact that it is difficult to obtain a large number of typical fault samples in reality, scholars in Tsinghua University. The flexible morphological filtering technology is applied to the fault diagnosis of rolling bearings in Wan Fang data. After flexible morphological filtering, the edge contour and shape characteristics of the signal can be effectively extracted. At the same time, it is robust. In practical application. Since 1990s, scholars from Zhejiang University, Tongji University and other universities began to study the fault diagnosis of construction machinery. The working condition monitoring system has been developed in cooperation with Changjiang Excavator Factory and Guangxi Yulin Diesel Engine Factory. Real-time monitoring of hydraulic, engine and electrical operating state parameters. And displayed on the LCD screen. When fault information is detected, it will give an alarm through sound, light and image.
3. Network cluster integrated control is a system composed of several construction machines with different functions through network communication. Through multi-machine coordination and joint operation, an engineering task is completed. Cluster control technology is the optimal configuration or combination of clusters. That is, taking mechanized operation cluster system as the object, using statistics, operational research, simulation and other methods. The coordination function of the system is established through analysis and judgment, and then the best result of the system is obtained by optimization method. Make all kinds of mechanical equipment in the system work in coordination with each other, so as to obtain a cluster control system with advanced technology, reasonable economy, reliable operation and high efficiency. In 2003, Jiangsu Xugong Group undertook to complete the project of "Cluster Intelligent Construction Machinery". Comprises an intelligent paver, a mixing station, a roller, a loader, an articulated dump truck and an all-terrain truck crane. The comprehensive benefit of construction is improved by more than 25%, and the maintenance cost of construction equipment is reduced by 20%. WD- 10 automatic trackless stacker jointly developed by Hefei Intelligent Research Institute of China Academy of Sciences and Hefei Forklift Factory is the first overhead stacking forklift based on network control in China. This technology integrates cluster optimization configuration, intelligent scheduling, collaborative control and data communication technology.