Bionic bat sonar experiment system device based on multi-axis cradle head

Abstract

The invention discloses a bionic bat sonar experiment system device based on a multi-axis cradle head. The bionic bat sonar experiment system device based on the multi-axis cradle head comprises a bionic bat model, a mechanical main body and an electric control system, wherein the mechanical main body comprises a horizontal turntable, a U-shaped bracket and a cradle head base; and the electric control system comprises a controller, a steering engine, an ultrasonic transducer, a signal modulation circuit, an LCD display screen, a control key and a power supply. The horizontal turntable is fixed on the cradle head base; the steering engine for controlling the U-shaped bracket to swing is fixed on a turnplate of the horizontal turntable; the horizontal turntable and the U-shaped bracket are respectively driven by the independent steering engine. The LCD display screen and a control key are arranged on the cradle head base; and the controller, the signal modulation circuit and the power supply are arranged on the internal side of the cradle head base. The bionic bat model is fixedly connected to the U-shaped bracket; and micro ultrasonic transducers are mounted in an oral cavity and ear canals of the bionic bat model. A bionic bat head model adopts a three-dimensional reconstruction structure model in bat sample cross section tangential image scanned by a micro CT, is made by using a 3D printing technology and keeps the natural physiological structure of a bat. The bionic bat sonar experiment system device based on the multi-axis cradle head, disclosed by the invention, can simulate target detecting and searching functions of the bat and can be applied to teaching demonstration and scientific research related to bionic sonar.

Description

technical field [0001] The invention relates to the technical field of bionic sonar, in particular to a bionic bat sonar experimental system device based on a multi-axis platform. Background technique [0002] The ultrasonic ranging system based on bat ultrasonic echo positioning has been widely used in industrial control, survey measurement, safety precautions, robot obstacle avoidance and other fields. The mode adopted by a typical ultrasonic ranging system is the single-shot and single-receive mode, which is composed of an ultrasonic transmitter, an ultrasonic receiver and its related conditioning circuits, and calculates the distance of the target or obstacle through the ultrasonic pulse echo transit time. So far, even the most advanced man-made sonar systems are far less accurate and efficient than bat echolocation systems. In fact, the shape and structure of the bat's ears, mouth and nasal lobes play a very important role in sonar detection. Experiments have proved th...

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Problems solved by technology

[0004] (1) The frequency range of the sound emitted by bats is usually between 25kHz and 100kHz. However, the commonly used piezoelectric ultrasonic transducers are bulky and work at a fixed frequency, which cannot meet the requirements of bionic bat sonar research.

[0005] (2) The physiological structure of the bat head has an important impact on the directivity and sensitivity of the bat sonar system, but the widely used bat model of single shot and single receiving, single shooting and double receiving (one mouth and two ears) is too simple to be realistic Reflecting the impact of the complex physiological structure of bats on the regulation of the sound field

[0006] (3) The existing sonar measurement devices are usually fixed on the corresponding equipment, and only detect targets in a certain fixed direction, and have a single function, which greatly limits the scope of use

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