Corona sensing device and method and voltage resistance tester

A detection device and a technology of withstand voltage testing, which are applied in the direction of testing circuits, testing dielectric strength, etc., can solve the problems of inability to effectively detect frequency corona discharge, inability to detect insulation deterioration corona discharge, etc.

Active Publication Date: 2011-01-19
致茂电子(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the detectable frequency band of arc discharge detection is mostly around 200KHz, and it cannot effectively detect corona discharge with higher frequency and smaller discharge volume.
In other words, the existing quality inspection procedures do not have the means to detect corona discharge caused by insulation degradation, thereby preventing subsequent failure problems

Method used

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  • Corona sensing device and method and voltage resistance tester
  • Corona sensing device and method and voltage resistance tester
  • Corona sensing device and method and voltage resistance tester

Examples

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Embodiment Construction

[0033] see figure 1 , figure 1 It is a block diagram of the corona detection device according to the first embodiment of the present invention. The corona detection device 10 includes a voltage supply module 12 , a peak-hold module (peak-hold) 14 and a judgment module 16 .

[0034] The voltage supply module 12 is used to provide a test voltage for an object under test 20 . For example, alligator clips are used to tap the high voltage output end and the low voltage output end of the voltage supply module 12 to two places of the object under test 20 . In practical applications, the object 20 to be tested can be a small electronic component such as a resistor or a capacitor, or it can be a large electronic device such as a production line machine. As long as appropriate fixtures are used, the voltage supply module 12 can be matched with various objects to be tested.

[0035] If there are some flaws in the insulating portion of the object under test 20 , the test voltage provid...

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PUM

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Abstract

The invention provides a corona sensing device which comprises a voltage supplying module, a peak holding module and a judging module, wherein the voltage supplying module is used for providing a test voltage for an object to be tested; and the peak holding module is used for sensing a current passing through the object to be tested when the test voltage is applied to the object to be tested and generating an extending voltage according to the current. The invention also provides a corona sensing method which comprises the following steps of: firstly providing the test current for the object to be tested, and sensing the current passing through the object to be tested when the test voltage is applied to the object to be tested; and then, generating the extending voltage and judging whether corona discharge occurs or not when the object to be tested bears the test voltage. The device and the method can effectively sense high-frequency slight discharge due to broken holes or cracks in the object to be tested.

Description

technical field [0001] The present invention relates to testing devices, and in particular to testing devices for testing the presence or absence of defects in insulating objects. Background technique [0002] With the advancement of science and technology, various commercial, household and personal electronic products have become increasingly popular in recent years. In addition to function and appearance, product safety and durability are also given considerable attention. How to prolong the service life of products and prevent users from being hurt due to product damage is a topic of concern to many product designers and manufacturers. Generally speaking, before the products leave the factory for sale, they must also go through the quality inspection procedures. [0003] Whether it is small electronic components such as resistors and capacitors, or large electronic equipment such as production line machines, there are more or less parts made of insulating materials. Af...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R31/14
Inventor 范富强陈鹤升翁健昆
Owner 致茂电子(苏州)有限公司
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