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Color waveform display method for digital oscilloscope

A digital oscilloscope and waveform display technology, applied in the direction of digital variable/waveform display, digital variable display, instruments, etc., can solve the problem of slow waveform speed, low resolution of single color brightness change, and inability to clearly observe complex Details of dynamic signal changes, etc.

Active Publication Date: 2017-06-13
SOUTHEAST UNIV
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Problems solved by technology

When measuring complex dynamic signals such as video signals and modulation signals that are constantly changing with time, because the traditional digital oscilloscope monochrome waveform display generally adopts the method of software drawing, the speed of displaying the waveform by drawing the collected data is slow, and the waveform update rate Lower, tends to miss many details of signal changes
In addition, although the brightness level of monochrome display can reach dozens or even hundreds of kinds, the human eye's ability to distinguish brightness changes of a single color is not so high, so it is impossible to clearly observe and observe Identify the change details of those complex dynamic signals, thus affecting the measurement and related debugging work of engineers and technicians on these complex dynamic signals

Method used

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  • Color waveform display method for digital oscilloscope

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[0188] A color waveform display method of a digital oscilloscope reflects the frequency of occurrence of signals by displaying the warm and cold colors in the waveform. Such as figure 1 shown, including the following steps:

[0189] Step (1), performing color grouping on the maximum value range of the waveform frequency values ​​counted within the display refresh timing time, to obtain the frequency value interval of each group of colors.

[0190] The setting of the display refresh timing can be adjusted according to the maximum value of the waveform frequency value counted within the timing time, so that the maximum value of the waveform frequency value is close to the power of two, so as to facilitate color grouping and discrimination.

[0191] Assume that the maximum value range of the waveform frequency value is [0,2 13 -1], the waveform frequency value can be expressed in 13-bit binary as: b 12 b 11 b 10 b 9 b 8 b 7 b 6 b 5 b 4 b 3 b 2 b 1 b 0 ; Assuming th...

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Abstract

The invention discloses a color waveform display method for a digital oscilloscope. The method uses the color coldness and warmness in the display waveform to reflect the level of signal frequency. The method comprises the steps that firstly the collected waveform points per frame are statistically processed by the frequency value within the display refresh timer time, then assigned to the corresponding color group according to the size of the frequency value of statistically collected waveforms points, and finally converted to the corresponding RGB color display data in the color group. Compared with the monochromatic waveform display method, the color level of the present method displayed by the color waveform display is far greater than the brightness level of the Mono waveform display, thus signal changes in a long time can be more detailed and better rendered for the measured signals. The method can be achieved by an FPGA hardware, the speed of RGB display data conversion is fast, and the waveform update rate is high.

Description

technical field [0001] The invention relates to a color waveform display method of a digital oscilloscope, which belongs to the technical field of digital oscilloscope display. Background technique [0002] In recent years, the measurement of complex dynamic signals has challenged engineers and technicians. When measuring complex dynamic signals such as video signals and modulation signals that are constantly changing with time, because the traditional digital oscilloscope monochrome waveform display generally adopts the method of software drawing, the speed of displaying the waveform by drawing the collected data is slow, and the waveform update rate Lower, tends to miss many details of signal changes. In addition, although the brightness level of monochrome display can reach dozens or even hundreds of kinds, the human eye's ability to distinguish brightness changes of a single color is not so high, so it is impossible to clearly observe and observe Identify the details o...

Claims

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Application Information

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IPC IPC(8): G01R13/02
CPCG01R13/029
Inventor 高礼忠崔城
Owner SOUTHEAST UNIV
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