Infrasonic wave generating device
A device for generating infrasound waves, applied in the field of infrasound waves, can solve the problems of affecting research work, difficult to control the directivity of infrasound waves, and propagation without directivity.
Pending Publication Date: 2018-09-07
ROCKET FORCE UNIV OF ENG
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Problems solved by technology
Due to the very low frequency of the infrasonic wave, its propagation in the air is not directional, and most of the current infrasonic wave generating equipment is gas explosion or piston type, which cannot make the energy of the generated infrasonic wave converge at a specified position in space, that is, the The directivity of the generated infrasound is difficult to control, and the infrasound diverges seriously, which affects the follow-up research work
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[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0038] The current infrasonic wave generating equipment is mostly gas explosion or piston type, and the infrasonic wave generated is difficult to control in terms of directivity. Based on this, an infrasound wave generating device provided by an embodiment of the present invention can improve the directivity of infrasound waves by using the acoustic parameter theory in nonlinear acou...
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The invention provides an infrasonic wave generating device and relates to the technical field of infrasonic waves. The device comprises a user terminal and a transmitter, the user terminal comprisesan infrasonic signal generator, a signal processor and a power amplifier, which are connected in sequence; the transmitter comprises an ultrasonic transducer transmitting array; the ultrasonic transducer transmitting array is connected with the power amplifier; the infrasonic signal generator generates an infrasonic digital signal in an infrasonic signal frequency band range; the signal processoris used for carrying the infrasonic digital signals to an ultrasonic frequency band for modulation and digital-to-analogue conversion to obtain an analog ultrasonic signal; the power amplifier is usedfor carrying out power amplification on the analog ultrasonic signal to obtain an analog audio signal; the ultrasonic transducer transmitting array transmits an analog audio signal to a designated direction, so as to form an infrasonic wave signal with directivity in the air. The infrasonic wave generating device is used for carrying a low-frequency infrasonic signal on a high-frequency ultrasonic carrier signal to be transmitted, so that directional transmission of the infrasonic waves is realized.
Description
technical field [0001] The invention relates to the technical field of infrasonic waves, in particular to an infrasonic wave generating device. Background technique [0002] Sound waves with frequencies less than 20 Hz are called infrasound waves. Because the frequency of infrasonic waves is very low, the wavelength of infrasonic waves is very long, which can bypass some large obstacles for diffraction; and infrasonic waves are not easy to attenuate when propagating in the air, so they can travel several kilometers or even farther. Because infrasound waves of certain frequencies are similar to the vibration frequency of human organs, once they resonate with human organs, they are very harmful to the human body, and can cause death when they are dangerous. With the continuous deepening of research on infrasound in the scientific community, infrasound has the advantages of long propagation distance, strong penetrating ability, and no electromagnetic environment interference, ...
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IPC IPC(8): H04R3/00
CPCH04R3/00
Inventor 李夕海康志谦牛超曾小牛刘继昊
Owner ROCKET FORCE UNIV OF ENG