Development Of Aeronautical Induction Coil Pose Data Acquisition System

In the Fixed-wing Time-domain Airebone Electromagnetic Survey System measurement flight, the three-component induction coil sensor changes its posture and generates vibration as the bird swings, and its posture and vibration have a great influence on the measurement performance of the Fixed-wing Time-domain Airbone Electromagnetic Survey System. Relying on the research sub-project “Fixed-wing Time-domain Airebone Electromagnetic Survey System Utility” of the major project of national 863 Plan,this paper studied the receiving bird of the Fixed-wing Time-domain Airebone Electromagnetic Survey System and the Pose Data recording System of the internal airebone induction coil. The study mainly completed the pose data collection and recording of the three-component induction coil hang on the special star-shaped vibration absorber device in the bird during flight,and completed the data analysis of moving posture of the three-component induction coil,so as to solve the change law and vibration of its posture as well as other parameters,which is used to be calibration reference to the exploration system data to improve the accuracy of the exploration system data,so that the exploration performance of the system would be improved.Due to the narrow space of the receiving bird and the restriction of power supply, large-scale and high energy consuming attitude measurement apparatus could not be implemented,hence this paper proposed a kind of design scheme for small-scale and low power consuming motion attitude detection and recording system based on embedded processor. The design chose STM32 embedded processor writing in SD card by transplanting FATFS file system,so as to complete recording of attitude data and GPS data,as well as calculation and analysis of attitude data making use of computer. The original attitude data completes format conversion and analysis of the data through the data pretreatment software programmed by LABVIEW; smooth denoising the attitude data by Savitzky-Golay filter. Above process realized the recording of the attitude data of object motion,and completed analysis of the data through time-domain analysis and frequency-domain analysis.Finally, the paper designed and completed a set of pose data acquisition system including hardware and software system,which was successfully applied in the fixed wing time-domain airborne electromagnetic survey system measurement,and the system worked in stability and collected large amount of attitude data. Through analysis of the data,data feedback to the damping device of the bird was finally realized.