| The present paper has conducted the research in view of the single chip microcomputer to the satellite antenna automatic location controlling.At present,each developed country satellite TV directly have entered into the family,and the individual receiver has become the mainstream which the satellite TV receives.Our country vast in territory,and the population distribution uneven;the wired television network is not developed,mostly suits the development satellite TV direct seeding in our country.Installing a set of satellite antenna receiving system,when antenna alignment relatively stationary orbit on satellite,it can receive the rich television program.An essential question which meets middle the actual uses is to be quickly and accurately adjust a good position.The adjustment satellite antenna position calculates the satellite antenna azimuth,the elevation angle according to the locus latitude and longitude and its angle of polarization receives the ideal television signal through the manual regulation antenna.The uses of the satellite antenna requests to be high,when different satellite is not being more convenient,and it needs to have one kind conveniently,one control system which can be quick satellite antenna automatic.Use Visual C++(i.e.VC) as the develop platform to realize the programming. The software contact surface designs extremely convenient,the programming work small,the development cycle short,and especially.It suits non-computer specialized engineers and technicians grasping.Moreover it also has a very strong function in the microcomputer serial port correspondence aspect for inputting the satellite on the software and receiving the place or the latitude and longitude and the satellite name. calculating the satellite antenna after the transfer database data three localization parameters for azimuth,elevation angle and angle of polarization,and through the computer serial port transmission for single chip microcomputer.The single chip microcomputer sends out the information,through rapes the control circuit,which control rapes,and it is a typical open-loop control electric circuit,and could correct control antenna arriving(azimuth and elevation angle).We have installed the electronic compass and the inclination angle sensor on the satellite antenna,that they transmitted the satellite antenna current azimuth and the elevation angle by the digital quantity form the single chip microcomputer,and passed to the single chip microcomputer with the satellite antenna parameter comparison its bigger smaller than the actual value,the movement whose the coding control raped,is equal to the current actual value and the predicted value,it rapes the stop movement,control the termination.This has been formed a closed-loop control system.The single chip microcomputer control the high frequency tuner the angle of polarization change step-by-step through the electrical machinery,the high frequency tuner angle of polarization feedback information using the spectrometer.The holding wire meets down with a spectrometer end and the satellite antenna high frequency tuner is connected to another end and the satellite receiver can be connected,and given the single chip microcomputer eight field intensity indicating circuit digital signal.The single chip microcomputer may judge high level,the size which the satellite signals strength is whether strongest according to demonstration and further controls the electrical machinery rotation high frequency tuner step-by-step.Finally we have realized the satellite antenna automatic control goal. |
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