Waveform display method for virtual oscillograph

Abstract

The invention discloses a waveform display method for a virtual oscillograph. The waveform display method comprises the following steps: (10) judging whether waveform signals received by the virtual oscillograph are periodic signals, if so, entering step (20), and if not, directly displaying the received signals; (20) judging way of the periodic signals received by the virtual oscillograph, entering step (30) if the periodic signals are determined to be one-way periodic signals and entering step (40) if the periodic signals are determined to be n-way periodic signals; (30) measuring and calculating optimal repainting point number in the one-way periodic signals; (40) measuring and calculating optimal repainting point number in the n-way periodic signals; and (50) displaying a waveform. According to the waveform display method, the one-way periodic signals can move along a specified direction, or the n-way periodic signals can move along a specific direction in maximum quantity, so that the visual effect of the virtual oscillograph can be improved.

Description

technical field [0001] The invention relates to the field of virtual oscilloscopes, in particular to a waveform display method for virtual oscilloscopes. Background technique [0002] Virtual oscilloscope is one of the development hotspots of today's instrument technology. Many industrial equipment need to display and save working condition waveforms, such as wind power converters. For the virtual oscilloscope software with real-time monitoring function, the real-time and stability requirements of its data acquisition and waveform display are higher. If timing redrawing is used, high-precision timing will lead to a higher processor occupancy rate. In addition, the clock asynchrony between the computer and the external acquisition device will also cause the amount of data received by the virtual oscilloscope software within a fixed time to be inconsistent. , resulting in shaking of the displayed waveform. In order to display the periodic waveform smoothly, the method of fix...

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Problems solved by technology

[0003] When using fixed-point redrawing waveforms, due to the different selection of redrawing points, visually the same periodic signal may sometimes be static, sometimes move to the left, sometimes move to the right, or sometimes the waveform is reversed, although in fact these waveforms are always in the Move to the left; for multiple periodic signals with different frequencies, when they are displayed on the same coordinate axis at the same time, the visual effect of the above-mentioned waveform movement direction will also appear, and the interface will be confusing

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