Design And Implementation On Antenna Auto-tracking System Of Vehicle-mounted Satellite Television

Since the digital satellite television opening in the world, the rapid development of digital satellite TV, under the influence of digital environment, vehicle-mounted satellite TV also arises at the historic moment. Based on on-board television antenna as the research object, this paper puts forward the car TV antenna automatic tracking system, the system involving electronic compass and gyroscope and single-chip computer and other modern devices, by controlling the motor to realize the antenna for satellite signal capturing and tracking.Onboard satellite TV main technical difficulty is that the system in mobile carrier and complex road conditions, finish the satellite signal scan capture and keep the antenna pointing to the same, antenna gets azimuth angle disturbance, elevation angle disturbance and roll angle disturbance. This article discusses the solution of how the vehicle-mounted mobile TV antenna automatic tracking satellite, and design based on single chip microcomputer control motor servo platform, carrier compensation methods are given, in order to make sure the car antenna which is driving, can track the satellites.Overview the background and development situation at home and abroad, the main subjects of the research content, introduces the related car antenna automatic tracking method, discusses the tracking accuracy and the advantages and disadvantages of various methods, on the basis of the original tracking method, puts forward a new method for tracing called program step tracking method. At the same time, the interrupt method was applied to complete the antenna angle compensation, use simulation test the new method. This article introduced the design of the system scheme, the simulation system is given. Detailed introduction of system hardware and software, including control chip, motor and drive chip choice; Circuit design issues needed in the process of the design and development platform, etc.