The invention belongs to the technical field of
signal investigation, and particularly relates to a small unmanned aerial vehicle investigation
system and method based on weak signals, and the
system comprises a radio monitoring module, an investigation positioning module, a control module, a
sound wave monitoring module, a
sound wave amplification module, a
sound wave equipment information module, a scheme refining module and an effect ratio module. Through the arrangement of the sound wave monitoring module, when weak signals in the investigation range are monitored, not only can the
electromagnetic environment when the weak signals appear be monitored, but also the fluctuation environment when the weak signals appear can be monitored, so that the unmanned aerial vehicle can be investigated more accurately, a user can customize a sensitive threshold value, and the detection accuracy is improved. The method adapts to different investigation scenes and requirements, can improve the attention and investigation effect on specific weak signals, can obtain the information and precision of different sound wave monitoring devices, can generate a precision compensation scheme and analyze a matching value, can give full play to the potential of the devices, and can avoid resource waste while improving the monitoring precision.