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System and method for sending sound with two different frequencies at the same time using one energy converter

A transducer and frequency technology, applied in radio wave measurement systems, instruments, electroacoustic musical instruments, etc., can solve the problems of large physical size and high cost of transducers, and achieve reduced production costs, easy phase control, and reduced The Effect of Size and Power Consumption

Inactive Publication Date: 2006-06-21
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of the above-mentioned existing systems and methods for respectively emitting two frequency sound waves that require two transducers and two sets of systems, the physical size of the transducer is relatively large, and the cost is high, and provides a A transmitting system and method for simultaneously emitting two sounds of different frequencies using one transducer, utilizing the characteristics of multiple frequency components contained in irregular signals, using one transducer to simultaneously emit two sound signals of different frequencies; further, let The work of the power transmitting unit is in the switch state, thereby greatly reducing its own power consumption, realizing the miniaturization of the transmitter, reducing manufacturing costs and improving efficiency

Method used

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  • System and method for sending sound with two different frequencies at the same time using one energy converter
  • System and method for sending sound with two different frequencies at the same time using one energy converter
  • System and method for sending sound with two different frequencies at the same time using one energy converter

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Make a dual-frequency acoustic emission system in the buried object detection sonar for an underwater robot, and its principle block diagram is as follows Figure 4 shown. include:

[0042] The controller 1 adopts the ADUC841 chip, and is electrically connected with the 24-bit address generator 2, the waveform data memory 3, and the class D power amplifier 5, and is used to coordinate the synchronous work of each component, control the pulse width and repetition times per second of the generated acoustic signal, Output control instructions to address generator 2 and class D power amplifier 5;

[0043] 24-bit address generator 2, using EPLD: 7128 chip, electrically connected with waveform data table memory 3, for outputting the address of waveform data table;

[0044] Waveform data table memory 3, adopts AMD29F100X8 chip, is electrically connected with drive buffer 4, and is used to store waveform data containing two frequency signals that need to be transmitted, and o...

Embodiment 2

[0065] Such as Figure 4 As shown, the system also includes a USB / RS232 interface 8 electrically connected to the controller 1; the system can work under the control of a remote device through the USB / RS232 interface 8, and the remote control is provided by the remote device according to the system. Sound waves are emitted under the control of control instructions, and other requirements are as described in Embodiment 1.

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Abstract

The invention discloses an energy converter to launch two different frequency sound sources, which comprises the following parts: broad-band energy converter, controller, feeding power, D-type power amplifier, waveshape data list storage and address generator, wherein the controller coordinates each part to work simultaneously, which controls the pulse breadth and repeating times per second of sound signal and outputs the order to the address generator and D-type power amplifier; the address generator outputs the data address to the waveshape data list storage, which outputs the data to the D-type power amplifier; the D-type power amplifier connects the broad-band energy converter, which supplies enough power to drive the electric power; the broad-band energy converter transmits the electric power into sound power to launch out.

Description

technical field [0001] The invention relates to a sound source, in particular to a sound source which utilizes a transducer to emit sounds of two different frequencies simultaneously. Background technique [0002] Sound sources with small size, low frequency and good directivity are useful in many ways, and the sound source of parametric array sonar has these characteristics. In parametric array sonar equipment, it is required to transmit two original frequency sound signals f with relatively close frequencies 1 , f 2 . After the two original frequency sound signals are transmitted into the water medium, due to the nonlinear effect of the water medium, there will be combined frequency and difference frequency phenomena. Since the combined frequency is much higher than the difference frequency, it will be quickly absorbed by the medium. The difference frequency can propagate a relatively long distance because the medium absorbs it less. Therefore, the difference frequenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10H7/00G01S7/52
Inventor 王润田华乐荪
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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