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Data acquisition device based on information entropy

A technology of data collection and information entropy, applied in the display of digital variables, etc., can solve the problems of complex calculation and time-consuming

Active Publication Date: 2020-06-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose a data acquisition device based on information entropy, which can solve the problem of complex and time-consuming calculation while reducing the pressure of data transmission and storage in the time domain measurement system, and realize the signal waveform real-time collection and processing of

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  • Data acquisition device based on information entropy
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  • Data acquisition device based on information entropy

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example

[0051] One of the typical applications of the present invention is to observe sporadic glitches in slowly changing signals, which are described in detail below.

[0052] In this example, a digital oscilloscope with a real-time sampling rate of 5GSa / s is used to observe the occasional glitch in a slowly changing signal. The pulse width of the glitch is 1ns, then as Figure 5 As shown, the glitch is sampled to 5 points, while the rest of the waveform is sampled evenly at the same sampling rate. Set the horizontal time base scale to 50ms / div, and the scale in the horizontal direction has 10 divisions, then the displayed waveform length is 500ms. At the current sampling rate, the storage depth L required to save these sampled data is 2.5Gpts, which brings a huge burden on data transmission, storage and processing. In fact, the storage depth of common digital oscilloscopes is actually much smaller than this value.

[0053] Under the limited storage depth, in order to capture the ...

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Abstract

The invention discloses a data acquisition device based on information entropy. The device comprises the steps of using a peak detector to uniformly divide an ADC output sequence into sub-sequences with the length of k; detecting the maximum value and the minimum value of each sub-sequence; performing differential processing in a differentiator to obtain a differential value corresponding to eachsubsequence; comparing the differential value with a set threshold value r in a comparator; if the comparison result is greater than the set threshold value r, gating an original sampling sequence forstorage, and marking 0; and if the comparison result is not greater than the set threshold value r, gating a maximum and minimum value sequence for storage, and marking 1. According to the invention,on the premise that valuable waveform information is reserved, the number of acquisition points is greatly reduced, and the pressure of data transmission and storage is reduced; waveform data can becompressed through simple logic; the problems that calculation is complex and time is consumed are solved; and real-time collection and processing of signal waveforms are achieved.

Description

technical field [0001] The invention belongs to the technical field of data acquisition, and more specifically relates to a data acquisition device based on information entropy. Background technique [0002] With the rapid development of electronic technology, modern electronic signals present the characteristics of high bandwidth, transient and non-stationary. How to extract and analyze the rich information carried in such signals is an important task of modern signal measurement technology. [0003] Time-domain measurement technology based on real-time sampling and processing is the mainstream of modern signal measurement technology. Its basic structure is as follows: figure 1 shown. In this system, the analog-to-digital conversion circuit (ADC) is its key component. The higher the sampling rate, the higher the bandwidth of the analog signal that can be collected, and the stronger the signal reconstruction ability of the system; The higher the value, the higher the accur...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R13/02
CPCG01R13/02
Inventor 张沁川王端阳蒋俊潘卉青杨扩军
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA