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Small object positioning device based on bat bionic sonar and construction method and application of small object positioning device

A bat bionic sound and positioning device technology, applied in the direction of measuring devices, sound wave re-radiation, and utilization of re-radiation, can solve the problems of complex calculation of search methods and high performance requirements of signal transmission equipment, so as to save money and reduce the amount of mathematical operations , the effect of reducing performance requirements

Inactive Publication Date: 2018-08-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese Patent Publication No. CN106526578A discloses "Azimuth Estimation Method for Underwater Targets Based on Bat Binaural Positioning Model"; it estimates the parameters of underwater targets by searching for valley frequency points with the help of external ear transfer function, but only determines the azimuth and angle of the target. Pitch angle, its search method is complex to calculate, and the signal bandwidth used is 40KHz, which requires high performance of signal transmitting equipment

Method used

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  • Small object positioning device based on bat bionic sonar and construction method and application of small object positioning device
  • Small object positioning device based on bat bionic sonar and construction method and application of small object positioning device
  • Small object positioning device based on bat bionic sonar and construction method and application of small object positioning device

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Embodiment 1

[0053] Such as figure 1 shown.

[0054] A kind of small target localization device based on bat bionic sonar comprises, the signal transmission module that is respectively connected with main controller, pre-filtering module, ultrasonic acquisition module, storage module, operation module and result display module; Said signal transmission module passes through successively The pre-filtering module, the ultrasonic acquisition module, the storage module, the computing module are connected with the result display module; the computing module is connected with a pitch angle matching database.

[0055] The main controller is responsible for the normal operation of the entire system; the signal transmitting module transmits 30KHz~50KHz FM voice signals into the space; the pre-filter module is composed of the outer ear contour of the myotis, which filters and amplifies specific frequency bands from different pitch angles The storage module saves the echo signal reflected by the tar...

Embodiment 2

[0059] Such as image 3 shown.

[0060] A method for constructing a small target positioning device as described in embodiment 1, the specific steps are:

[0061] A1) Obtaining a three-dimensional image of the ear of the myotis bigfoot by CT scanning;

[0062] A2) Print the three-dimensional image of the ear of the myotis spp. through a 3D printer to obtain a bionic antenna;

[0063] A3) Fix the ultrasonic acquisition module at the root of the bionic antenna;

[0064] A4) establish pitch angle matching database:

[0065] A4.1) Fix the pitch angle of the bionic antenna, transmit the chirp signal, collect the echo signal through the ultrasonic acquisition module and store the echo signal in the storage module;

[0066] A4.2) The computing module performs Fourier transform on the received echo signal to find out the frequency point corresponding to the maximum amplitude value of the echo signal in the frequency domain, which corresponds to the pitch angle one by one, and the ...

Embodiment 3

[0069] Such as figure 2 shown.

[0070] A kind of method utilizing the device described in embodiment 1 to carry out small target localization, concrete steps comprise:

[0071] B1) start the ultrasonic acquisition module, start to record the echo signal in the space;

[0072] B2) start the signal transmitting module, and transmit the FM voice signal in the space;

[0073] The generation formula of described FM voice signal is as follows:

[0074]

[0075] Among them, be s(t) FM voice signal; f 0 Be the center frequency of the linear frequency sweep signal, be 40KHz in the present embodiment; k=B / τ 0 Be the FM frequency of the linear frequency sweep signal, B is the frequency range of the linear frequency sweep signal, in the present embodiment B is 20KHz, τ is the pulse width of the linear frequency sweep signal, in the present embodiment τ 0 is 5 ms; a(t) is the envelope of the chirp, and the size of the envelope set in this embodiment is constant, that is, a(t)=1; ...

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Abstract

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.

Description

technical field [0001] The invention relates to a small target positioning device based on bat bionic sonar and its construction method and application, belonging to the technical field of location service systems. Background technique [0002] In microphone array signal processing, at least three sensors are required to form an L-shaped array to determine the azimuth and elevation angles of the target when spatially locating the target. If you want to further obtain the three-dimensional space coordinates, you need to adjust the array for secondary positioning, and combine the azimuth and elevation angles obtained from the two measurements to finally obtain the closed-form solution of the space coordinates. The reversing radar technology, which is widely used in life, simply uses the time difference between transmitting ultrasonic waves and receiving reflected echoes for distance measurement, and cannot obtain the three-dimensional space coordinates of the target. [0003]...

Claims

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Application Information

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IPC IPC(8): G01S15/42
CPCG01S15/42
Inventor 马昕潘玉锋张森程浩蒋佳霖殷东雷
Owner SHANDONG UNIV
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