Design of ultrasonic leak location detector based on FPGA for spacecraft based on orbit

The research on the ultrasonic leak location technology for spacecraft orbit environment is of great significance to ensure long-term normal operation, eliminate leakage in time, maintain cabin and life safety astronauts. Taking wall structure gas pipeline space station as object, aerodynamic sound source characteristics are analyzed, acoustic analyzed extracted. Based theoretical basis, an detector developed with non-contact sensor camera probe FPGA core processor. tests carried out simulate vacuum sealed positive pressure pipeline, signals under different holes processed. According magnitude Eigen values, point position determined by patrol inspection form detection process. results show that signal weak, amplitude increases increase hole. characteristic ultrasound there will be obvious main peak frequency band 40KHz ± 3kHz. more than 0.2mm can effectively detected through inspection, positioning accuracy better 20mm. lay a foundation rapid station.