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Method for automatically testing ripple noise of power supply

An automatic test and power supply ripple technology, applied in the field of ripple noise, can solve the problems of inaccurate measurement of power supply ripple noise, instability, low efficiency, etc., and achieve the effect of fast and flexible switching position, accuracy and stability improvement

Inactive Publication Date: 2019-12-31
深圳市菲菱科思通信技术股份有限公司
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Problems solved by technology

[0004] Based on the background technology, the way to measure power supply ripple noise is to use an oscilloscope probe to manually touch the two ends of the output pin of the single-board power module. Because of its instability, the power supply ripple noise cannot be accurately measured, and it takes manpower and time. , the technical problem of lower efficiency, the present invention proposes a method for automatically testing power supply ripple noise

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  • Method for automatically testing ripple noise of power supply

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Embodiment Construction

[0025] The present invention will be further explained below in conjunction with specific embodiments.

[0026] refer to Figure 1-2 , a method for automatically testing power supply ripple noise, comprising the following steps:

[0027] S1: The oscilloscope must be calibrated first, and the original waveform of the oscilloscope should be correctly debugged before testing;

[0028] S2: Set up the oscilloscope. The oscilloscope probe uses a single-ended passive probe. For signals with small amplitudes, the probe attenuation ratio uses a 1:1 probe;

[0029] S3: Fix the test board on the coordinate moving platform, and the special probe of the oscilloscope is loaded on the coordinate moving platform, which is driven by the motor through the belt drive. The movement of the probe includes three directions: X, Y, and Z;

[0030] S4: Convert the CAD data of the design engineer into a usable test data file;

[0031] S5: Move the two probes to contact with the two solder joints resp...

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Abstract

The invention belongs to the field of ripple noise, and particularly relates to a method for automatically testing the ripple noise of a power supply. In an existing mode of measuring the ripple noiseof a power supply, an oscilloscope probe is used to manually touch the two ends of an output pin of a single-board power supply module, the ripple noise of the power supply cannot be accurately measured due to instability, labor and time are consumed, and the efficiency is low. In order to solve the problem, a scheme as follows is proposed: the method comprises the following steps: S1, an oscilloscope is calibrated, and the original waveform of the oscilloscope is correctly debugged out before testing; and S2, the oscilloscope is set, a single-ended passive probe is adopted as an oscilloscopeprobe, and a probe with an attenuation ratio of 1: 1 is adopted for signals with very small amplitude. The scheme is simple in layout, low in manufacturing cost and beneficial to expanding production.

Description

technical field [0001] The invention relates to the technical field of ripple noise, in particular to a method for automatically testing the ripple noise of a power supply. Background technique [0002] Since the DC stabilized power supply is generally formed by the AC power supply through rectification, filtering, voltage stabilization and other links, it is inevitable that there will be some AC components in the DC voltage. This AC component superimposed on the DC stabilized voltage It is called ripple, and ripple cannot be completely eliminated, but it can only be controlled within the allowable range as much as possible. A high-frequency noise that appears outside the ripple is called noise. Ripple and noise voltage are one of the parameters to measure the quality of power supply, so how to measure it accurately is an important issue. [0003] The current way to measure power supply ripple and noise is to use an oscilloscope probe to manually touch the two ends of the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/26G01R31/42
CPCG01R29/26G01R31/42
Inventor 曾宪堂张浩冯小毛
Owner 深圳市菲菱科思通信技术股份有限公司
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