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Method for achieving data compression of digital oscilloscope based on field programmable gata array

A digital oscilloscope and data compression technology, applied in the direction of digital variable display, etc., can solve the problems of slow refresh speed and low waveform capture rate of the oscilloscope, and achieve the effect of speeding up the refresh speed, increasing the storage depth, and improving the capture rate

Inactive Publication Date: 2015-06-10
FUJIAN LILLIPUT OPTOELECTRONICS TECH
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Problems solved by technology

[0003] However, the storage depth is getting higher and higher, and the ADC data that needs to be accessed within one sampling time will also increase. If all the ADC data are directly displayed, the refresh rate of the oscilloscope will slow down, and the waveform capture rate will decrease. Low

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  • Method for achieving data compression of digital oscilloscope based on field programmable gata array
  • Method for achieving data compression of digital oscilloscope based on field programmable gata array

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Embodiment Construction

[0023] see Figure 1-2 As shown in one, the present invention comprises external memory 1, stores the digital signal data that external analog signal collects through the analog-to-digital converter, FPGA2, processes the digital signal data in the external memory, and screen 3 shows that it is processed by the FPGA2 After receiving the digital signal, the external memory 1, FPGA 2 and screen 3 are electrically connected in sequence.

[0024] see figure 1 , in this embodiment, the basic process of compressing ADC data inside the FPGA is introduced.

[0025] The method for realizing digital oscilloscope data compression based on FPGA is as follows: the digital signal data converted by analog-to-digital converter 7 is compressed by FPGA2, and the digital signal converted by analog-to-digital converter 7 is stored in external memory 1, collected The total amount of signals is defined as T, the FPGA compression rate is defined as N, the amount of each group of data signals is a, ...

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Abstract

The invention discloses a method for achieving data compression of a digital oscilloscope based on a field programmable gata array (FPGA). The method for achieving the data compression of the digital oscilloscope based on the FPGA includes that digital signal data which is collected by analog signals through a module converter is compressed by the FPGA, the FPGA firstly stores data in an external storage into a storage FIFO1, and a first value, a maximum value, a minimum value and a last value of data are found out from a set of data according to given compressibility and then are stored in a storage FIFO2 through a compression module, digital signals in the external storage are circularly processed, and when a data volume in the storage FIFO2 reaches a set value, the storage FIFO2 stores and retrieves the data no longer, and the data in the storage FIFO2 is sent to an oscilloscope screen to be displayed. The method for achieving the data compression of the digital oscilloscope based on the FPGA not only improves the storage depth of the oscilloscope, but also accelerates the update rate of the oscilloscope, a continuous wave shape is obtained, and the capture rate of the oscilloscope is improved.

Description

technical field [0001] The invention relates to the field of oscilloscope digital signal processing, in particular to a method for realizing digital oscilloscope data compression based on FPGA. Background technique [0002] The digital oscilloscope converts the analog quantity into a digital signal through an analog-to-digital converter (hereinafter referred to as ADC), collects it through an FPGA, and finally displays it on the screen. Storage depth is an important index parameter of digital oscilloscope. The higher the memory depth, the more obvious the waveform details can be displayed by the oscilloscope within the same sampling time, which is more convenient for users to observe the waveform. The refresh rate is also a parameter of the oscilloscope. The faster the refresh rate, the user can see more continuous waveforms and improve the capture rate of the oscilloscope. [0003] However, the storage depth is getting higher and higher, and the ADC data that needs to be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R13/02
Inventor 蔡振越庄双集陈焕洵
Owner FUJIAN LILLIPUT OPTOELECTRONICS TECH
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