The invention relates to a small object positioning device based on bat bionic
sonar and a construction method and application of the small object positioning device. The device comprises a
signal emitting module, a pre-filtering module, an ultrasonic acquisition module, a storage module and a calculation module, wherein the
signal emitting module, the pre-filtering module, the ultrasonic acquisition module, the storage module and the calculation module are connected with a main controller. The
signal emission module is connected with the calculation module through the pre-filtering module, the ultrasonic acquisition module and the storage module. The calculation module is connected with a
pitch angel matching
database. According to the invention, through a
double array element, the
azimuth and the
direction angle of the target can be determined, the distance of the target can be determined, and the three-dimensional coordinate of the target can be precisely estimated; and in addition,the used
signal frequency band is only 20KHz, so the performance requirements on a hardware device are reduced.