Weak signal detection circuit based on chaotic oscillator

A technology of weak signal detection and chaotic oscillator, which is applied in the direction of frequency measurement device, etc., can solve the problems of motion attenuation and dissipation, and achieve the effect of avoiding disassembly detection

Inactive Publication Date: 2013-03-13
HANGZHOU DIANZI UNIV
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Problems solved by technology

At this point, there is only dissipative force in the system and no driving force, because damping dissipates energy, making the motion attenuate

Method used

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  • Weak signal detection circuit based on chaotic oscillator
  • Weak signal detection circuit based on chaotic oscillator
  • Weak signal detection circuit based on chaotic oscillator

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with accompanying drawing.

[0045] like figure 2 As shown, the chaos detection module includes a power module 1 , a multiplication module 2 , an amplification and summation module 3 and an integral operation module 4 . Connect the power supply module to provide +15V, -15V and +5V working voltage for each module of the system to ensure the reliable operation of the system.

[0046] like image 3 Shown is the multiplication module, which includes the first four-quadrant analog multiplier AD633JN chip (U101), the second four-quadrant analog multiplier AD633JN chip (U102), capacitor C101, capacitor C102, capacitor C103 and capacitor C104. Pin 1 (X1) and pin 3 (Y1) of the first four-quadrant analog multiplier AD633JN chip (U101) are connected to the input voltage V1, that is, connected to pin 6 of the eighth operational amplifier OP177FP chip (U303). The first four-quadrant analog Pin 2 (X2), pin 4 (Y2...

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Abstract

The invention relates to a weak signal detection circuit based on a chaotic oscillator. A power supply module in the circuit provides +15V, -15V and +5V direct current voltages for the whole circuit. A control module mainly controls a signal generation module to generate a control signal and adjust the parameters of a chaotic detection circuit module. A display module displays the frequency and intensity of the control signal in the chaotic detection circuit module and the system detection frequency scanning range. An input module adjusts the system frequency scanning range. The signal generation module generates the control signal required. An amplitude adjusting module adjusts the control signal as a chaotic threshold value and then is merged with a signal to be detected and sent to the chaotic detection circuit module. According to the weak signal detection circuit based on the chaotic oscillator, output phase diagrams are observed by inputting the frequency scanning range, the frequency scanning interval and the frequency scanning step length to identify the weak signal.

Description

technical field [0001] The invention belongs to the field of weak signal detection and processing, and relates to a weak signal detection circuit based on a chaotic oscillator. Background technique [0002] The invention detects weak signals, that is, weak periodic signals in the noise background. One of the traditional methods for detecting weak signals in noise is to filter through filters, which can only filter out signals in a certain frequency band. For example: a low-pass filter passes low-frequency signals and filters out high-frequency signals. The high-pass filter passes the high-frequency signal and filters out the low-frequency signal; while the weak signal detection method based on the chaotic oscillator uses the sensitivity of the chaotic system to periodic signals and the characteristics of certain immunity to noise. In the time domain, The detection of weak signals is carried out by observing the changes of the phase track output by the system. This method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/02
Inventor 赵文礼吴敏黄振强范剑赵景晓周芳
Owner HANGZHOU DIANZI UNIV
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