KR20160037395A

KR20160037395A - Leak Test Method by Monitoring Pressure and Temperature

Info

Publication number: KR20160037395A
Application number: KR1020140129661A
Authority: KR
Inventors: 김용석
Original assignee: 김용석
Priority date: 2014-09-27
Filing date: 2014-09-27
Publication date: 2016-04-06

Abstract

A leakage test method by testing a change in gas pressure and temperature comprises: a test space (a chamber), a volume control device (a pressure changing device) connected to the test space (the chamber), and a sensor which is able to detect a condition (temperature and pressure) of the test space (the chamber). While the test space (the chamber) is sealed, the volume control device (the pressure changing device) is driven to change a volume to detect a condition change (temperature and pressure) of the test space (the chamber) to derive an initial volume of the test space (the chamber) prior to the change. The volume control device (the pressure changing device) is continuously driven to change the volume of the test space (the chamber) to detect the condition change (temperature and pressure) to use a condition value after the change, and a previous condition value to derive the volume after the change. A derived result is compared with a result obtained by subtracting a volume control amount of the volume control device from the volume of the previous condition to determine a leakage if the results are different. The series of processes are set and performed in a plurality of steps to a reference pressure to determine a leakage in the reference pressure and a leakage start pressure if a leakage occurs prior to the reference pressure. The series of processes is able to quickly be performed by control and detection of a microcomputer to quickly and accurately detect whether a leakage occurs.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002]

The present invention relates to a method for performing leakage inspection using a gas without using water in order to determine a waterproof function of a portable device or the like, and is a method for detecting a volume of an inspection space (chamber) and an inspection space And a detection means capable of measuring the temperature and pressure in the inspection space (chamber).

Recently, waterproof functions such as portable devices are emerging as the main characteristics of products, and many users are using waterproofing products, and if these products fail, it is inevitable to repair them. However, after repairing these products, it is necessary to verify whether the waterproof function is damaged. Most repair shops do not have a device capable of judging the waterproof function, so they are sent to the factory equipped with the inspection equipment after the repair. It is not easy to inspect the waterproof function.

As a conventional technique, there is disclosed a device for detecting leakage of an electronic device, for example, a device for detecting leakage of an electronic device, a device for measuring leakage of electronic devices, Method and system ", Registered Patent No. 10-1406698 entitled " Two-Chamber Method Terminal Waterproof Inspection Device ".

In the conventional technique, the object to be inspected is placed in the chamber, the chamber is pressed, and a change in the pressure is detected.

It is difficult to precisely control the amount of the gas to be injected into the chamber, so that the test result is unstable. In the case of the patent No. 10-1406698 entitled " Two- However, the test result may become unstable due to factors such as the unevenness of the amount of the injected gas due to the influence of the temperature of the caution, and the leakage at the reference pressure can be determined. However, The test pressure must be limited to the reference pressure such that the set pressure of the control chamber unit is continuously varied and the test should be performed.

The present invention solves the pressure-based inspection of the prior art and the instability of inspection results due to factors that can not precisely control the state of the inspection space (chamber). It does not require a separate pressurizing device, It is possible to avoid the restriction of the inspection place due to the complexity.

A chamber (control chamber) capable of accommodating the object to be inspected and a volume control device (variable pressure device) capable of controlling the volume of the inspection chamber (chamber) can be formed as a single space. A method for accurately determining a state of a gas contained in an inspection space (chamber) by providing a detection means capable of measuring a pressure, characterized in that, by setting a plurality of determination steps before reaching a reference pressure, It is possible to determine not only the leakage at the reference pressure but also the leakage start pressure before the reference pressure.

It is possible to develop a device capable of easily performing inspection even in a place where a pressurizing device such as a service center is not provided because a separate pressurizing device is not required and the inspection device is simplified, A volumetric control device (transforming device) capable of controlling and changing the volume of the chamber (chamber) is constituted as one space, so that accurate inspection results can be obtained.

Fig. 1 shows a mechanism configuration for implementing the inspection method, and Fig. 2 shows a process (process) for carrying out the inspection.

The object to be inspected is put into the inspection space (chamber) and sealed with a cover, and then the initial pressure and temperature are detected. The initial volume of the inspection space is calculated by detecting the temperature and pressure fluctuation after the primary volume fluctuation is caused by driving the volume control device (transformer).

Subsequently, the volume control device (transformer) is driven to change the volume of the inspection space (chamber), detect temperature and pressure changes, and detect the current state of the inspection space (chamber) Derive the volume. The volume of the previous state is subtracted from the volume of the control device of the volume control device (transformer) and the volume of the current state is compared to determine that leakage has occurred.

It is possible to judge whether or not the reference pressure is leaked by setting a plurality of steps up to the reference pressure as described above and also determine the pressure at which the leakage starts when leakage occurs before reaching the reference pressure.

a: Volumetric control device (transformer)
b: Inspection space (chamber)
c: Cover for sealing
d: pressure and temperature detection device
e: subject to inspection
f: inner space of the inspection object
g: Volume control device driving device

Claims

A method for performing a leakage test of an object to be inspected using a gas,
A cover having a structure in which an inspection space (chamber) accommodating an inspection object and a volume control device (transforming device) are connected to each other and which can seal the inspection space,
And a detection device (sensor).

The method according to claim 1, wherein the volume of the inspection space (chamber) is changed through control of the volume control device (transforming device) to transform the accommodated gas (pressurization or decompression).

The method according to claim 1, wherein the volume of the inspection space (chamber) is varied, and the change in the temperature and the pressure state due to the variation is detected to derive the volume of the inspection space (chamber) after the variation.

The method according to claim 1, wherein the volume variation of the volume control device (transforming device) is compared with the volume of the inspection space (chamber) derived after the variation to determine whether or not the leakage occurs.

The method according to claim 1, wherein a plurality of steps are set prior to the reference pressure to determine the leakage initiation pressure.