It is composed of operating device, coding device, transmitting device, channel, receiving device, decoding device and actuator. According to the channel medium, it is divided into wired remote control, wireless remote control and optical remote control; according to the transmission mode Of the control signal, it is divided into single-channel remote control and multi-channel remote control.

Technology for remote control and monitoring of controlled objects. It generally refers to the technique of controlling a single or two extreme actions of a controlled object at a distance. Remote control is a comprehensive technology using automatic control technology, communication technology and computer technology, and it has important applications in various sectors of the national economy, especially aerospace and missile nuclear weapons. Controlled objects can be fixed, such as automated hydropower stations; It can also be active, such as drones, satellites, ballistic missiles, act remote control system generally has a monitoring function, which is actually a telemetry remote control system. Remote control in a broad sense also includes guidance. The commonly known remote control is the command remote control, that is, the control end sends the control com the controlled object through wired or wireless transmission, so that the controlled object acts according to the requirements of the control end. Signal transmission technology is a key technology of remote control. Wired remote control uses cables, shielded wires or to ich optical transmit has strong anti-interference, but can only be used for fixed controlled objects. Wireless remote control uses radio waves or laser beam transmission, which is mainly used for controlled objects of activity. Remote control often adopts multiple transmission mode in time. Multiple available division, frequency division and code division. Time-division remote control is the transmission of different control signals in a certain chronologica