Automatic test system and method of oscilloscope

An automatic test system and automatic test technology, applied in the field of measuring instruments, can solve the problems of expensive instruments, high test costs, application limitations, etc., and achieve the effects of saving storage resources, improving test efficiency, and reducing pressure

Inactive Publication Date: 2018-11-13
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The portable storage recorder is used for measurement, and the device cannot be programmed to complete the automatic measurement of the preset sequence when unattended; the device does not have adaptive measurement of the sampling rate. When the signal frequency exceeds the sampling bandwidth of the current set sampling rate, the signal Accurate measurement cannot be obtained; in addition, the instrument is expensive, the test cost is high, and the application is limited
[0005] (2) The digital oscilloscope is used for measurement, the storage depth of the digital oscilloscope is limited, and the stored measurement data is constantly refreshed, which cannot meet the test requirements for long-term signal recording; the test parameters cannot be automatically s...

Method used

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  • Automatic test system and method of oscilloscope
  • Automatic test system and method of oscilloscope
  • Automatic test system and method of oscilloscope

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Experimental program
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Effect test

Embodiment 1

[0104] Embodiment 1: a kind of oscilloscope automatic testing method comprises the following steps;

[0105] The digital oscilloscope measurement parameter setting and signal parameter query need to be completed manually. The oscilloscope automatic test system requires the system to automatically set the digital oscilloscope measurement parameters under the control of the host computer software.

[0106] The digital oscilloscope is in the state of stopping acquisition after a single trigger, and the automatic test system of the oscilloscope needs to automatically release the trigger to realize continuous automatic acquisition of signals.

[0107] The digital oscilloscope has a limited storage depth. In the normal mode, the DS1052E digital oscilloscope can store 16Kpts sampling points; in the long storage mode, it can store 1Mpts sampling points. Without deep storage, long-term signal recording cannot be realized. The oscilloscope automatic test system needs to have deep stora...

Embodiment 2

[0177] Embodiment 2: the automatic collection and storage of data contains the following steps;

[0178] The oscilloscope automatic test system automatically sets the measurement parameters of the digital oscilloscope under the control of the host computer software.

[0179] The digital oscilloscope is in the stop collecting state after a single trigger, and the oscilloscope automatic test system automatically releases the trigger to realize continuous and automatic signal collection.

[0180] The digital oscilloscope has a limited storage depth. In the normal mode, the DS1052E digital oscilloscope can store 16Kpts sampling points; in the long storage mode, it can store 1Mpts sampling points. Without deep storage, long-term signal recording cannot be realized. The oscilloscope automatic test system design program stores the collected data to the PC in real time, so that the system has deep storage capabilities and realizes long-term signal measurement and recording.

[0181]...

Embodiment 3

[0184] Automated testing of complex tests.

[0185] The oscilloscope automatic test system can complete the automatic measurement task according to the predetermined test sequence for the well-known signals, and set the measurement parameters of the oscilloscope before the possible arrival time of the signal, which is conducive to the measurement of signals with different characteristics and different test items, and improves the measurement efficiency and accuracy . The implementation method and program design have been introduced in the previous article, and now an experiment is designed to verify the function.

[0186] The present invention adopts two groups of representative test sequences for testing, and the test sequence information is as follows: Figure 14 shown.

[0187] For the convenience of measurement, each test time is set to 5 minutes, and the interval between adjacent test sequences is also set to 5 minutes. The first signal arrives at 13:47 and lasts 5 min...

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Abstract

The invention provides an automatic test system and method of an oscilloscope, and belongs to the technical field of measuring instruments. The automatic test method of an oscilloscope includes the steps: based on a LabVIEW platform, self-manufacturing a set of oscilloscope automatic test software being able to control a digital oscilloscope to automatically set measurement parameters; automatically releasing the acquisition stopping state after single time of triggering, and realizing continuous automatic acquisition of signals; and automatically storing acquired data in a PC, thus solving the problem that the digital oscilloscope is not enough in the storage depth, and realizing long time of measurement and recording of signals in an unattended operation condition; according to a test demand, realizing automatic measurement of the preset test sequence; and according to the change of the signal, automatically adjusting the measurement shift (horizontal time base and vertical shift), and realizing adaptive measurement of unknown signals.

Description

technical field [0001] The invention relates to an oscilloscope automatic test system and method, belonging to the technical field of measuring instruments. Background technique [0002] At the engineering test site, due to the constraints of the site environment, the test often needs to be carried out unattended, such as the railway site test, the tester can only arrange the test equipment at the skylight point, and leave the test site after setting the measurement parameters. In the test process, the amplitude and frequency of the measured signal are often unknown in many cases. When the amplitude and frequency of the signal change, the test equipment needs to automatically adjust the measurement gear to ensure the measurement accuracy. In the project, in order to reduce the measurement error, the signal size should occupy more than 1 / 2 of the measurement range of the measuring equipment; in order to ensure the sampling accuracy, the sampling rate should be greater than tw...

Claims

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Application Information

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IPC IPC(8): G01R13/02
CPCG01R13/0209G01R13/029
Inventor 崔勇苏晨杨世武
Owner BEIJING JIAOTONG UNIV
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