Inertial bridge with onboard signal processing

The developed module was designed to offer better accuracy of measurement than other similar products on the market. It is able to give information about the attitude and trajectory of the object to which is attached in the most difficult environments: an airplane in the cloud, a ship on the sea or a car in the middle of the desert. The accuracy is achieved using and ordinary 12bit SAR ADC from the MCU with special signal processing inside of the DSP, digital filtering and avoiding active circuits between the sensors and ADC. The main element will be the ADC and DSP able to give accuracy comparable with high performance external ADCs. This way the system is able to give accurate results so the trajectory can be reconstructed by integrating the speed or acceleration information. The developed module is able to give information from 10 sensors: 6 are from the triaxial accelerometer and three gyros needed to measure all moving degrees of freedom. Next to this are three magnetic sensors able to measure the earth magnetic field in 3D. And the tenth is an absolute pressure sensor for an electronic barometer.