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Method for automatically identifying discharge time of equipment capacitor and detection device

An automatic detection device and capacitor discharge technology, which is applied in the direction of measuring device, measuring resistance/reactance/impedance, measuring electrical variables, etc., to save the time of manual operation and improve the accuracy

Pending Publication Date: 2022-05-13
莱茵技术-商检(宁波)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method and detection device for automatically identifying the discharge time of the equipment capacitor to solve the problem of automatic detection of the capacitor discharge time

Method used

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  • Method for automatically identifying discharge time of equipment capacitor and detection device
  • Method for automatically identifying discharge time of equipment capacitor and detection device
  • Method for automatically identifying discharge time of equipment capacitor and detection device

Examples

Experimental program
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Embodiment 1

[0049] Such as figure 1 As shown, a method for automatically identifying the discharge time of a device capacitor in the present invention comprises steps:

[0050] S1. Obtain the working voltage waveform of the device through an oscilloscope;

[0051] S2. Judging whether the waveform is qualified according to the preset voltage value, if not, re-obtaining the working voltage waveform of the device;

[0052] Wherein, the step of judging whether the waveform is qualified according to the preset voltage value includes: calculating the voltage threshold At according to the preset voltage value, comparing the maximum value Amax and the minimum value Amin of the voltage in the waveform with the voltage threshold At, if the If the voltage threshold At is between the maximum value Amax and the minimum value Amin, the waveform is determined as a qualified waveform.

[0053] S3. If qualified, calculate the period of the waveform through the peak position in the waveform.

[0054] Su...

Embodiment 2

[0064] like image 3 As shown, a kind of automatic detection device of equipment capacitance discharge time of the present invention comprises:

[0065] A capacitor discharge time detection system, wherein a method for automatically identifying the device capacitor discharge time is set, and the capacitor discharge time detection system is installed in a computer;

[0066] One end of the oscilloscope is connected to the computer, and the other end is connected to the equipment through the switch box. The power supply is connected to the computer and the equipment respectively, and the system can directly set the corresponding parameters of the power supply and control the working state of the power supply. The voltage output value of the power supply is sent to the system after data collection by the power meter, so that the user can know whether the power supply is working in a stable state.

[0067] Among them, such as Figure 4 As shown, the capacitor discharge time dete...

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Abstract

The invention belongs to the technical field of capacitance detection, and provides a method for automatically identifying discharge time of a device capacitor and a detection device, and the method comprises the steps: obtaining a working voltage waveform of a device through an oscilloscope; judging whether the waveform is qualified or not according to a preset voltage value, and if not, obtaining the working voltage waveform of the equipment again; if yes, the period of the waveform is calculated through the wave crest position in the waveform; finding a plurality of position points meeting a preset condition according to the period of the waveform, and intercepting two new waveforms from the waveform according to the position points; and after the two waveforms are aligned, the discharge position of the capacitor is found by comparing the two new waveforms, so that the discharge time point of the capacitor is obtained. The method has the advantages that the data collected by the oscilloscope are automatically processed, the capacitor discharge point in the oscilloscope is found after the waveform is converted, and compared with a mode of manually reading parameters in the oscilloscope, the accuracy of finding the capacitor discharge time point is improved.

Description

technical field [0001] The invention relates to the technical field of capacitance detection, in particular to a method and a detection device for automatically identifying the discharge time of equipment capacitance. Background technique [0002] In the product safety qualification test and certification, the capacitance discharge of the input port is a very important item, and the experiment of this item must be carried out in all motor products. According to the requirements of the test, the capacitor discharge must cut off the input voltage at the peak of the power supply. While cutting off the voltage, it is also necessary to use an oscilloscope to capture the waveform and read the data. There are two problems in this way. First, the commonly used switch-controlled power supply is typically at a voltage of 50Hz or 60Hz. The interval between each peak value is between 16.7ms and 20ms. Cut off the input voltage when the power supply peaks; second, it is difficult to use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/26
CPCG01R27/26
Inventor 明涛徐建泽施映初刘林鹏
Owner 莱茵技术-商检(宁波)有限公司