1.Introduction
High frequency spark leak detector, as an efficient and accurate non-destructive testing equipment, is widely used in leak detection work of various vacuum systems, metal anti-corrosion coatings, etc. Based on the principle of high-frequency spark discharge, it can quickly and accurately detect small defects on the surface of objects, greatly improving the efficiency and accuracy of leak detection work. This article will provide a detailed explanation of the principle of the high-frequency spark leak detector and explore its advantages in practical applications.
2.High-frequency spark leak detector of principle
The working principle of high-frequency spark leak detector is mainly based on high-frequency high-voltage ground discharge technology. It contains a high-frequency high-voltage generator inside. When the device is started, the high-frequency high-voltage generator will generate high-frequency pulse waves and transmit them to the surface of the object to be detected. These high-frequency pulse radio waves form an electric field on the surface of an object. When there are defects or weak links (such as cracks, corrosion, holes, etc.) on the surface of the object, the electric field will concentrate in these areas, causing gas ionization and spark discharge phenomena.
Specifically, the high-frequency spark leak detector controls the distance between the electrode and the object being tested and the frequency of the high-voltage current to generate discharge between the electrode and the object being tested. When discharge occurs, the electric spark leak detector will record the characteristics of the discharge, such as discharge position, discharge intensity, etc., in order to determine whether there are defects on the surface of the tested object. At the same time, the sound, light and other signals generated during the discharge process will also be captured by the leak detector as an auxiliary basis for determining the existence of defects.
3.high-frequency spark leak detector of structure and composition
The high-frequency spark leak detector mainly consists of a high-frequency high-voltage generator, electrodes, control system, alarm circuit, and other parts. Among them, the high-frequency and high-voltage generator is the core component responsible for generating high-frequency pulse electric waves; The electrode is used to come into contact with the object being measured, forming a discharge circuit; The control system is used to control the distance between the electrode and the object being measured, as well as the frequency of the high-voltage current; The alarm circuit is used to sound or light an alarm when a defect is detected.
The high-frequency spark leak detector has a simple structure, small size, light weight, and is easy to carry and use. It can be used with a pressure range of 103-10-10-1Pa and can detect a minimum leakage rate of 10-3-10-4Pa · m3/s. This high-frequency electric spark can be used to search for subtle loopholes in glass vacuum systems or devices, and can also be used for leak detection in vacuum systems of non-conductive materials such as rubber and ceramic pipes. When testing metal vacuum systems or containers, it is necessary to use glass gauge tubes or blind tubes placed on the metal system for leak detection.
4.High-frequency spark leak detector of application advantages
The high-frequency spark leak detector has the following advantages in practical applications:
Efficient detection: The high-frequency spark leak detector can quickly detect small defects on the surface of objects, avoiding the possible omissions and false detections in traditional detection methods and improving detection efficiency.
High precision: By controlling the distance between the electrode and the object being tested and the frequency of the high-voltage current, the high-frequency spark leak detector can accurately locate the location of defects and determine the severity of the defects.
Non destructive testing: The high-frequency spark leak detector adopts non-destructive testing methods, which will not cause damage or destruction to the tested object.
Wide applicability: The high-frequency spark leak detector is suitable for leak detection work on various conductive substrates, anti-corrosion coatings, vacuum systems, etc., and has a wide range of application prospects.
5.Conclusion
The high-frequency spark leak detector, as an efficient and accurate non-destructive testing equipment, plays an important role in leak detection work. Based on the principle of high-frequency spark discharge, it can quickly and accurately detect small defects on the surface of objects, improving the efficiency and accuracy of leak detection work. With the continuous advancement and development of technology, high-frequency spark leak detectors will be applied and promoted in more fields.
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