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Digital oscilloscope trigger method and system based on power spectrum entropy

A technology of digital oscilloscope and power spectrum, applied in the direction of digital variable display, digital variable/waveform display, instrument, etc., can solve the problem of capturing abnormal signals for a long time, it is difficult for users to identify and observe abnormal signals, and the inconvenience of testing, etc., to reduce The effect of storage and processing burden

Active Publication Date: 2019-05-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the efficiency of these two methods is relatively low, and it takes a long time to capture abnormal signals, and because these two methods superimpose the waveforms acquired by multiple triggers when displaying, it is difficult for users to correctly identify and observe Abnormal signal, which brings inconvenience to the test

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  • Digital oscilloscope trigger method and system based on power spectrum entropy
  • Digital oscilloscope trigger method and system based on power spectrum entropy
  • Digital oscilloscope trigger method and system based on power spectrum entropy

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Embodiment

[0044] In order to better illustrate the technical solution of the present invention, firstly, the basic concept of power spectrum entropy is briefly explained.

[0045] Information entropy is a basic concept of information theory. Assume that M is a σ-algebra generated by a measurable set class S and a Lebesgue space with μ measure, μ(M)=1, and the space M can be expressed as its finite partition A={ A i} in the form of mutually exclusive sets, namely: and A i ∩A j = Φ, Then the information entropy for this division A is:

[0046]

[0047] Among them, μ(A i ), i=1,2,...,n is the set A i measure.

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Abstract

The invention discloses a digital oscilloscope trigger method and system based on power spectrum entropy. Firstly, according to one trigger parameter sampling, the sampling signal of the previous a-frame waveform data is obtained, and the corresponding power spectrum entropy is obtained by calculation, which is used as the singular spectrum entropy comparison threshold after averaging. , and then calculate the power spectrum entropy for the a+1th and subsequent waveform data, if it is greater than the power spectrum entropy comparison threshold, it is determined that the current waveform data is an abnormal signal, and a second trigger is performed to store and display the corresponding waveform data, Otherwise do nothing. The invention judges and generates the trigger signal based on the power spectrum entropy of the signal, and realizes the storage and display of the abnormal signal.

Description

technical field [0001] The invention belongs to the technical field of digital oscilloscopes, and more specifically relates to a power spectrum entropy-based digital oscilloscope trigger method and system. Background technique [0002] In the field of time-domain testing, digital oscilloscopes are increasingly used. With the increasing complexity of the measured signal, the ability to capture abnormal signals such as sporadic and transient events has become an important indicator to measure the data acquisition performance of the oscilloscope. [0003] Generally, two methods can be used to improve the abnormal signal capture ability of the oscilloscope: one is to directly increase the waveform capture rate of the oscilloscope (the number of captured and displayed waveforms per unit time), the higher the capture rate, the higher the probability of the oscilloscope capturing abnormal events. Big. Another method is to use the infinite persistence function of the digital oscil...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R13/02
CPCG01R13/0209G01R13/0254
Inventor 蒋俊郭连平焦晓曼黄武煌曾浩谭峰
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA