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Method for accurately positioning trigger position based on programmable circuit

A technology of precise positioning and trigger position, applied in the field of signal processing, can solve the problems of easy missing of key occasional signals, high time consumption, low capture rate of oscilloscope waveform, etc., to achieve clear execution process, clear division of labor, easy coordination control and cross- The effect of platform porting

Active Publication Date: 2019-05-17
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In summary, the main problem solved by this application is that it takes a long time for the software to interpolate and accurately locate the trigger position, resulting in a low waveform capture rate of the oscilloscope, and it is easy to miss key occasional signals

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  • Method for accurately positioning trigger position based on programmable circuit
  • Method for accurately positioning trigger position based on programmable circuit
  • Method for accurately positioning trigger position based on programmable circuit

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Embodiment Construction

[0049] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0050] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0051] Based on the strong computing power of the software and the fast execution speed of the hardware, this so...

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Abstract

The invention discloses a method for accurately positioning a trigger position based on a programmable circuit. The method for accurately positioning the trigger position based on the programmable circuit comprises the steps that time base gears and trigger delay of a data collection and analysis type instrument are detected; whether a user changes the time base gears or trigger delay or not is judged, if so, software parameters are arranged and sent to a field programmable gate array (FPGA) through bus communication, and a collection interpolation process is restarted; a processor obtains sampling data and combines the real-time sampling data into an array according to the channel combination condition; and when the data collection and analysis type instrument is located at an interpolation gear, real-time interpolation is carried out, then, trigger point repositioning is carried out, an interpolation point is adjusted, so that a generated waveform performs stable display taking a trigger level as a reference point. According to the method for accurately positioning the trigger position based on the programmable circuit, interpolation and trigger accurate positioning are realizedthrough pure hardware, and consuming time is less. The scheme is clear in division of labor, according to the execution fast and slow level of software and hardware, by combining real-time requirementof an oscilloscope, the characteristics of high software calculation capacity are fully played, and key parameters required by the hardware interpolation are calculated.

Description

technical field [0001] The present disclosure relates to the technical field of signal processing, in particular to a method for precisely locating a trigger position based on a programmable circuit. Background technique [0002] In data acquisition and analysis instruments such as oscilloscopes, the process of reducing the waveform sampling rate to remove too much data is called signal extraction, and the process of increasing the waveform sampling rate to increase data is called signal interpolation. Interpolation means inserting calculated values ​​between the data points collected by the ADC according to a specific algorithm, so as to increase the sampling rate and analyze the signal details more clearly. There are three common interpolation methods: linear interpolation, hold interpolation and sinusoidal interpolation. [0003] Such as Image 6 As shown, sine interpolation is also called "sin(x) / x" interpolation, which is the most commonly used interpolation method. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R13/02
Inventor 刘永刘洪庆张成森郭桂雨王励郭同华邵建波向前李云彬王啸
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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