Oscilloscope with Rotatable Display

Abstract

The invention relates to an oscilloscope with a rotatable display screen, which includes a data acquisition unit, a drawing processing unit, a central processing unit and a touch display unit, wherein the data acquisition unit is for external signal input, and the input signal Processing a set of digital waveform data, the drawing processing unit is connected with the central processing unit and the data acquisition unit, and has a waveform processing unit, the waveform processing unit is controlled by the central processing unit to enable a first coordinate waveform processing module and one of the second coordinate waveform processing modules, which process the digital waveform data into the waveform display interface corresponding to the first or second coordinate, and then display it on the touch display unit; in this way, the waveform display interface switches coordinates again to perform When rotating, it can be achieved by switching the first and second coordinate waveform processing modules through the hardware circuit, without the coordinate conversion operation of the software, and the update rate is improved.

Description

technical field [0001] The invention relates to a portable measuring instrument, in particular to a portable digital oscilloscope with display screen rotation function. Background technique [0002] An oscilloscope is an instrument used to measure electronic signal waveforms. It is widely used in testing and researching electronic signals and characteristic curves of electronic components. [0003] The internal circuits of existing oscilloscopes are mainly as Figure 10 shown, which contains: [0004] A data acquisition unit 70, which has a group of signal input ports 71 for external signal input, and after signal amplification, sampling and analog-to-digital conversion, a group of digital waveform data is obtained and output; [0005] A drawing processing unit 80 is connected with the data acquisition unit 70, and after receiving the digital waveform data, processes the digital waveform data into a waveform display screen output; [0006] A central processing unit 90 is c...

AI Technical Summary

Problems solved by technology

[0008] Most of the traditional oscilloscopes are desktop type, which is not easy to carry. Thanks to the reduction in the size of electronic components, there is a portable oscilloscope that is smaller in size and easier to carry, but its operation method is still mechanical keys. It is more troublesome and the display screen is smaller. Since portable electronic devices have been gradually improved to touch operation in recent years, oscilloscope manufacturers also intend to improve portable oscilloscopes and add a touch operation interface, but they are also faced with The technical bottleneck of display screen rotation

[0009] Since supporting screen rotation is one of the almost essential functions of existing portable electronic devices, it is convenient for users to look at them horizontally or upright. However, existing handheld devices usually require the output of data to be displayed Directly use software to perform coordinate conversion calculations, convert the original screen from the first coordinate (such as horizontal coordinate) to the second coordinate (vertical coordinate), and then output it to the display unit for display. If the above-mentioned oscilloscope uses software to perform For waveform drawing and coordinate conversion, the waveform display screen must be output after coordinate operations (such as matrix operations), and is generally executed by a software program built in the central processing unit 90, which will greatly increase the cost of processing the waveform display screen. It takes time, so that the refresh rate (Refresh Rate) of the waveform display screen is greatly reduced. The reduction of the refresh rate may have little effect on the use of handheld devices such as smart phones, but for the oscilloscope, once the refresh rate is reduced, its When measuring high-frequency signals, some occasional burst signals in the high-frequency signal will not be displayed, and the lower the update rate, the higher the probability of occasional burst signals not being displayed. Therefore, the update rate is too high. Low will not be conducive to the user to observe the waveform of the signal

For this reason, the existing portable oscilloscopes are still unable to achieve the purpose of rotating the display direction and having a high update rate at the same time, but the use of touch operation interface is a trend, and it is necessary to actively seek solutions for related technologies

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