Method for compensating amplitude of emission signal of broadband sonar system

A technology for transmitting signals and acoustic signals, which is applied in the field of compensating the amplitude of the transmitted signal of a broadband sonar system, and can solve the problems of increasing the design difficulty of the transmitting system and the difficulty of high-order matching circuits.

Active Publication Date: 2015-09-23
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the transfer function of the actual transducer is difficult to be expressed by an analytical function and the components that make up the matching circuit are not ideal components, it is very difficult to realize the required high-order matching circuit, which increases the design difficulty of the entire transmitting system

Method used

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  • Method for compensating amplitude of emission signal of broadband sonar system
  • Method for compensating amplitude of emission signal of broadband sonar system
  • Method for compensating amplitude of emission signal of broadband sonar system

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specific Embodiment approach 1

[0089] Specific implementation mode 1: The method for compensating the amplitude of the signal transmitted by the broadband sonar system of this embodiment is specifically prepared according to the following steps:

[0090] Step 1. The sonar launch system transmits the ideal chirp signal x 0 [n] As shown in Figure 3(a) and Figure 3(b), in the anechoic pool, the ideal sonar receiving system is used to collect the distorted chirp signal y[n] emitted by the transducer as shown in Figure 5(a) and Figure 5. (b); Among them, the sonar emission system is composed of an ideal signal source, a power amplifier, a broadband matching circuit and a transducer. The bandwidth of the ideal chirp signal is the working bandwidth of the sonar emission system. The specific components and connections are as follows figure 2 As shown, the amplitude-frequency response of the broadband matching circuit and the transducer is as Figure 4 Shown

[0091] Step 2: Combine the distorted chirp signal y[n] with t...

specific Embodiment approach 2

[0097] Specific embodiment two: this embodiment is different from specific embodiment one in that in step one, the sonar emission system transmits the ideal chirp signal x 0 [n] As shown in Figure 3(a) and Figure 3(b), in the anechoic pool, the ideal sonar receiving system is used to collect the distorted chirp signal y[n] emitted by the transducer. The specific process:

[0098] (1) The ideal chirp signal is amplified by the power amplifier;

[0099] (2) The amplified ideal chirp signal is output to the transducer through the broadband matching circuit;

[0100] (3) The transducer converts the electrical signal into an acoustic signal (distorted chirp signal) and radiates into the water;

[0101] (4) The ideal sonar system uses the collector to collect the distorted chirp signal emitted by the transducer in the water as shown in Figure 5(a) and Figure 5(b);

[0102] The ideal sonar receiving system uses standard hydrophones and measurement amplifiers to process the received acoustic si...

specific Embodiment approach 3

[0103] Specific implementation manner 3: The other steps of this implementation manner are the same as those of specific implementation manners 1 or 2, except that the broadband matching network design process in step 1 is specifically:

[0104] (1) Use an impedance analyzer to test the input impedance data Z of the transducer l (s);

[0105] (2) Using impedance data Z l (s) Calculate the output impedance function Z of the matching network q (s);

[0106] (3) According to Z q (s) The calculated implementation structure and parameters of the broadband matching network. Other steps and parameters are the same as those in the first or second embodiment.

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Abstract

The invention discloses a method for compensating the amplitude of an emission signal of a broadband sonar system. The method comprises the following steps that a sonar emission system emits an ideal chirp signal x0[n], and an ideal sonar reception system is used to collect a distorted chirp signal y[n] in a soundproofing water pool; an error function e[n] is constructed, an estimated value, which satisfies the condition of min{E[e2[n]]}, of a transfer function of a broadband matching network and an energy transducer is searched, and a transfer function w[n] of an amplitude compensator is obtained; the amplitude compensator adjusts the amplitude of the ideal chirp signal; the power of the adjusted chirp signal is amplified; the power-amplified chirp signal is output to the energy transducer via the broadband matching network; the energy transducer converts an electrical signal into an acoustic signal and radiates the acoustic signal to water; and the ideal sonar reception system is used to collect the acoustic signal emitted by the energy transducer in the soundproofing water pool. The method can be used to reduce amplitude distortion of the emission signal, and has the advantage of high precision.

Description

Technical field [0001] The invention belongs to the field of sonar signal emission, and in particular relates to a method for compensating the amplitude of the signal emitted by a broadband sonar system. Background technique [0002] In the design of broadband sonar system, the broadband transducer is an important part of the transmitting system. Generally, the transmitter voltage response within the bandwidth of the transducer fluctuates within 3dB, but in some broadband transducers, the transmitter voltage response fluctuates within 5-10dB. When the transducer emits a broadband signal, the emitted acoustic signal will produce Amplitude distortion. In the corresponding receiving sonar system, when the processor processes the distorted signal, the signal characteristic parameters obtained cannot meet the setting value of the detector. The signal characteristic parameters can include: signal amplitude, frequency, signal related amplitude, etc., so the distortion The signal will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/52
CPCG01S7/52G01S7/52004G01S7/534
Inventor 孙大军王永恒刘璐勇俊张殿伦张友文
Owner HARBIN ENG UNIV
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