Development of digital altimeter based on FPGA
Lu Han · Transducer and Microsystem Technologies · 2014
Aiming at height location application of sonar altimeter,GPS and barometric altimeter,a kind of digital altimeter based on FPGA is developed,which has advantage of low cost,fast speed,low power consumption.FPGA is responsible for completion of sonar altimeter,GPS and barometric altimeter data acquisition,height information processing,barometric altimeter temperature compensation,and serial port output.After analyzing barometric altimeter error sources,compensation and correction of temperature drift of barometric altimeter are emphasized on.In order to verify design effect,the digital altimeter is tested,and test results show that the precision of digital altimeter in a low range can reach 0.1 m or so,for high altitude range error is 2~ 3 m after error compensation,which can be used for general navigation field.