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Complex waveform triggering method based on segmented Chebyshev distance

A waveform trigger and distance technology, applied in the direction of digital variable display, etc., to achieve the effect of ensuring balance, accurate waveform similarity judgment, and ensuring response speed

Active Publication Date: 2018-01-30
吉赫科技(东莞)有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiency of level triggering, and propose a complex waveform triggering method based on the segmented Chebyshev distance, to solve the difficulty of triggering the synchronous triggering of complex signals, and quickly and accurately present on the digital storage oscilloscope Generate stable waveforms for complex signals

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  • Complex waveform triggering method based on segmented Chebyshev distance
  • Complex waveform triggering method based on segmented Chebyshev distance
  • Complex waveform triggering method based on segmented Chebyshev distance

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Embodiment Construction

[0025] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

[0026] image 3 is a flow chart of the complex waveform triggering method based on piecewise Chebyshev distance.

[0027] In this example, if image 3 As shown, the complex waveform triggering method based on the segmented Chebyshev distance of the present invention comprises the following steps:

[0028] Step S1: Reference Sample Sequence Acquisition

[0029] First collect the measured signal, and obtain a reference sample sequence of length n, denoted as (R 0 , R 1 ,...,R n-1 ) ， Wherein, n is determined according to the period estimation of the signal under test, ...

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Abstract

The invention discloses a complex waveform triggering method based on segmented Chebyshev distance, and the problem of multiple triggering is solved by introducing the waveform similarity measurement.A similarity measurement principle is utilized, and a real-time captured sample waveform is compared with a stored reference waveform. The similarity value represents the approximate degree of the input waveform relative to the reference waveform, and trigger pulses can be generated according to the similarity threshold value, so that complex signal waveforms can be stably displayed. Meanwhile, afuzzy membership degree function is introduced to prevent the comparison of the waveform similarity from being influenced by the actual amplitude of the waveform, and the influence of the diversity of the noise levels, so that the waveform similarity judgment is more accurate. In practical application, the segmented length of the algorithm can be dynamically adjusted according to a specific hardware design platform, and the balance of algorithm response speed and hardware resource consumption is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of digital storage oscilloscope triggering, and more specifically relates to a complex waveform triggering method based on segmented Chebyshev distance. Background technique [0002] An important function of a digital storage oscilloscope is to capture and analyze waveforms of interest to users. For simple waveforms, using conventional level trigger technology to generate a trigger signal consistent with the period of the input signal can make the waveform displayed stably as figure 1 shown. [0003] However, for complex signals, a cycle may contain multiple repeated signal features corresponding to multiple trigger points. Such as figure 2 As shown, if the same level feature appears multiple times in a complex signal cycle, the digital storage oscilloscope will overlap signals of different edges as trigger points, resulting in waveform superposition phenomenon, making the waveform unable to be displayed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R13/02
Inventor 张沁川曾浩邱渡裕杨扩军李卓才
Owner 吉赫科技(东莞)有限公司
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