1968_延時電路設(shè)計

1968_延時電路設(shè)計,延時,電路設(shè)計 Secondary radar Also called atc Radar Beacon System (ATCRBS: Air Traffic Control Radar Beacon System). It was originally in engagement in order to make the radar distinguish against the development of the two sides of the aircraft and identification system, when the system of basic principles and components for civil aviation through development of air traffic control, became secondary radar system. The controller from secondary radar is easy to know about the secondary radar transponder code, flying height, the speed, heading parameters, make the radar surveillance tools into the air by means of control, secondary radar is the emergence of the air traffic control of the most important technology progress, secondary radar to and a radar work together, its master antenna installation in an over the top of the radar, and a radar synchronization.The launch of the secondary radar pulse is pairs of, it is 1030 MHz transmit frequency, receive frequency is 1090 MHz, firing pulse by P1, P2, P3 pulse composition, P1, P2 pulse intermission for constant 2 microseconds, the P1, P3 pulse interval decided the secondary radar patterns. At present the use of civil aviation is two kinds of modes, and A kind of interval for 8 microseconds, called A model called 3 / A model (identification number); Another kind of interval 21 microseconds, called C mode (height) yards. Receiving pulse by 16 pulse a composition, contains the height of the object, the code, etc. Secondary radar system is another big part of the plane is the jacket transponder, answering machine is a in accept to the corresponding signal after a different form encoded signal transceiver, answering machine to the ground in the receiving secondary radar signal after asking for, corresponding to answer. These signal is the ground of secondary radar antenna, after decoding, at a radar screen appears display the plane next to the window of the plane's show identification number and height, the controller can easily understand the position of planes and code. In order to make the controller to ask for the early years of the plane can quickly put the screen points of light and of the corresponding link up the plane, killing answering machine also has the identification function, the controllers requirement can press "recognition" button, then transponder send a special position recognition (SPI) pulse, the pulse make a station on the screen of a window grows wider, apart from other highlights on the screen.The 1970 s computer technology and radar combined with air of radar realized the automation. This system to a radar and secondary radar data of input data processing system, high-speed operation of the computer receive three aspects to data, the first one time of radar radar information, the first primary radar to pull the beacon information, and put it down ZiMa conversion, and the third is the center of the input of air flight process data, namely the flight plan, all kinds of data. This system tracking a plane, if it's flight plans have been reported to air center, then a computer has already been stored data, in a display screen will put the plane of the next step of the position and height is expected to show, the controller can completely from single process, directly on the radar screen of the relevant data all get the plane. This system has great improvement air control environment, improve the control efficiency.Secondary radar detection range is in commonly 300-370 km. Radar signal practical application to consider many factors, such as the weather factors and the influence of the height. Distance, low height can sometimes does not cover the. If the equipment is around obstacles, such as: mountain, also have influence. Generally speaking, 300 miles (kilometers) no problem.