Three-dimensional mapping method in scanning mode

Abstract

The invention discloses a three-dimensional mapping method in a scanning mode. By collecting input signals with a sampling rate that is higher by a factor of Dr than this sampling rate, more collecteddata can be obtained within a time interval of two pixels, all the collected data are mapped on the same column of a screen, and a fluorescence effect of the waveform display can be achieved. At thesame time, the address of a three-dimensional database is designed as an end-to-end structure, and a flag of the three-dimensional database is set. During the waveform display, numerical values of thethree-dimensional database are imported into a video memory starting from the address to which the flag points to a column before the address flag column, so that the leftmost waveform on the screenis always the oldest and the rightmost waveform is always up-to-date. In this way, the three-dimensional mapping in the scanning mode is achieved, and a digital oscilloscope is allowed to exhibit thefluorescent display effect also at slow time bases.

Description

technical field [0001] The invention belongs to the technical field of waveform display, and more specifically relates to a three-dimensional mapping method in a scanning mode. Background technique [0002] Sweep mode is a special display mode of the oscilloscope at slow time base. Since the screen refresh cycle of the oscilloscope is basically fixed, when the time base gear is large, that is, in the slow time base gear, the time required to acquire a waveform will be longer than the screen refresh cycle. At this time, reading all the data collected during the screen refresh period still cannot form a complete waveform, so the "scan mode" is usually used to display the waveform. [0003] The waveform display method in sweep mode is that the newly acquired waveform appears on the far right of the screen, and the previously acquired waveform moves to the left for the corresponding time length. When the waveform is continuously updated, the display effect of the waveform movi...

AI Technical Summary

Problems solved by technology

[0005] However, 3D mapping needs to collect multiple waveforms within one screen refresh cycle, but in the traditional scan mode, the digital oscilloscope is in a slow time base, and it takes a long time to collect one waveform, which cannot be collected in one screen refresh cycle. a complete waveform

Therefore, multiple waveforms cannot be obtained for three-dimensional mapping in scanning mode, and there is no waveform fluorescence effect