施工过程中干扰源的产生和解决（Generation and resolution of interference sources during construction）.docVIP

施工过程中干扰源的产生和解决（Generation and resolution of interference sources during construction） Generation and resolution of interference sources during construction Release date: 2006-6-19 Generation and solution of interference source in construction process In the process of construction, images are often disturbed. Especially in recent years, the scale of projection display system is becoming more and more big. The connection relation of large display system is more complex, and the probability of interference is increased obviously, and it is difficult to exclude. Therefore, system interference has become a difficult problem for system integrators. According to different sources of interference, interference can be divided into two types: electromagnetic radiation interference and ground wire interference. This paper will start from the principle of interference, analyze the causes of interference, and then propose ways to eliminate interference. 1. causes and elimination methods of electromagnetic radiation interference The principle of eliminating external electromagnetic interference by 1.1 transmission line The transmission line of the display system is mainly coaxial cable, in addition, some twisted wires are used. Both coaxial cable and twisted pair, they have the ability to resist electromagnetic interference. Coaxial cable is shielded to resist electromagnetic interference. Coaxial cable consists of an outer conductor and an inner conductor, and the two is a concentric circle with the center point of the cable as the center of the circle, so it is called a coaxial cable. Insulating material is used as a filler between the inner and outer conductors. An outer conductor is usually a mesh made of copper wire, which has a good shielding against external electromagnetic interference. The inner conductor is under the strict protection of the outer conductor, so the coaxial cable has good anti-interference ability. Twisted wire is a balanced method to eliminate external