KR101692824B1 - Test apparatus for altitude simulation and test method therefor - Google Patents

Test apparatus for altitude simulation and test method therefor Download PDF

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Publication number
KR101692824B1
KR101692824B1 KR1020150150767A KR20150150767A KR101692824B1 KR 101692824 B1 KR101692824 B1 KR 101692824B1 KR 1020150150767 A KR1020150150767 A KR 1020150150767A KR 20150150767 A KR20150150767 A KR 20150150767A KR 101692824 B1 KR101692824 B1 KR 101692824B1
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South Korea
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chamber
specimen
vacuum pump
vacuum
cooling water
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KR1020150150767A
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Korean (ko)
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이윤규
이연관
김홍일
김정범
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국방과학연구소
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/18—Investigating or analyzing materials by the use of thermal means by investigating thermal conductivity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/48—Thermography; Techniques using wholly visual means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0033—Heating devices using lamps
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Thermal Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)

Abstract

The present invention relates to an altitude simulation test apparatus, and a test method thereof. According to an embodiment of the present invention, the altitude simulation test apparatus comprises: a heating lamp (100) to heat a sample (1); a chamber (200) capable of forming a test environment of the sample (1) in a vacuum state; a vacuum pump (300) changing pressure in the chamber (200); a controller (400) capable of controlling the heating lamp (100) and the vacuum pump (300); and a cooler (500) which supplies cooling water to the chamber (200), and collects the cooling water heated in the chamber (200). According to the present invention, since the sample is heated in a low vacuum state (760-1 torr) in the closed chamber, the amount of heating in accordance with altitude is able to precisely be simulated by preventing convective heat transfer.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for testing high altitude simulation,

More particularly, the present invention relates to a test apparatus and a test method capable of performing a heat transfer test on the ground by controlling a degree of vacuum and a heating amount in a chamber, and more particularly, The present invention relates to a high-level simulation test apparatus and a test method capable of simulating a rapid change in pressure and a change in a heating amount in an environment where the air is lean according to a heating amount variation profile.

In order to simulate altimetry of real time pressure and heating change in ground test equipment, rapid reaction speed of vacuum pump and heating lamp is required as much as the vacuum degree and heating performance of test equipment. Conventional rapid heat transfer test equipment consisted of an infrared heating lamp made of nickel-chrome hot wire and transparent quartz, a heating lamp controller to control it, and a specimen holder to fix the specimen. Here, the infrared heating lamp satisfies the sufficient heating performance to simulate the heating amount in the actual environment. However, when heating is performed in an open space at atmospheric pressure, convection heat transfer due to the air around the specimen is additionally generated, so that it is difficult to simulate accurate heating amount in an environment where the air is lean.

On the other hand, a vacuum chamber device is used to simulate a pressure change, and a typical vacuum chamber device can be implemented with a vacuum pump to evacuate internal air to create a vacuum condition within the enclosed chamber. At this time, the vacuum pump is required to be capable of reducing pressure from atmospheric pressure to a low vacuum level within a few minutes in order to simulate a rapidly changing real environment. Also, precise control performance is required so that the required pressure level is maintained for a certain period of time. However, when a vacuum pump capable of precise control is used, it is difficult to simulate a rapid pressure change, and it is difficult to precisely control the pressure when using a large-capacity vacuum pump.

Patent Registration No. 10-1218092 (December 27, 2012)

It is an object of the present invention to provide a method and apparatus for heating a specimen using an infrared quartz heating lamp so as to simultaneously simulate a rapidly changing pressure and a heating amount in an air- The present invention also provides an apparatus and a method for testing a high-level simulator capable of precisely controlling the pressure inside a vacuum chamber through a large-capacity and precise vacuum pump while simultaneously simulating changes in heating amount through the vacuum chamber.

The apparatus for testing high-level samples according to an embodiment of the present invention includes a heating lamp 100 for heating a test piece 1; A chamber 200 in which a test environment of the specimen 1 can be formed in a vacuum state; A vacuum pump 300 for changing the pressure inside the chamber 200; A controller 400 for controlling the heating lamp 100 and the vacuum pump 300; And a cooler 500 for supplying the cooled cooling water to the chamber 200 and recovering the heated cooling water in the chamber 200.

The elevation simulation apparatus includes a moving rail 110 attached to a lower end of the heating lamp 100 and capable of adjusting a distance from the chamber 200 to the heating lamp 100 .

The chamber 200 includes a specimen mounting hole 210 formed at a front central portion thereof; And an observation window 230 formed on the rear surface so as to observe the temperature distribution of the specimen 1 using the infrared thermography camera 220.

The high-level simulation testing apparatus includes a specimen fixing plate 240 for fixing the specimen 1 inside the specimen mounting hole 210; A sealing member 250 surrounding the specimen mounting hole 210 and interposed between the inner surface of the specimen fixing plate 240 and the chamber 200; A first cooling water conduit 261 formed to communicate with upper and lower surfaces of both sides of the chamber 200 to cool the chamber 200; A second cooling water conduit 262 formed on the outer surface of the specimen fixing plate 240 along the sealing member 250 to prevent the sealing member 250 from being deteriorated; A cover 280 for fixing the specimen fixing plate 240 and the second cooling water conduit 262 to the chamber 200 by a plurality of clamps 270; And a vent valve (290) formed at the lower rear of the chamber (200) for discharging the air inside the chamber (200) to the outside of the chamber (200) when the inside of the chamber .

And the second cooling water conduit 262 includes a flap 263 opened at a predetermined temperature or higher.

The vacuum pump (300) includes a large capacity vacuum pump (310) which performs depressurization to a predetermined ratio of the target degree of vacuum; A precision vacuum pump 320 for reducing pressure to the target degree of vacuum after depressurization by the large capacity vacuum pump 310; And a flow path 330 for communicating the chamber 200, the large capacity vacuum pump 310 and the precision vacuum pump 320 so that the large capacity vacuum pump 310 and the precision vacuum pump 320 can be selectively used. And a vacuum control valve 340 for opening and closing the vacuum control valve 340.

The controller (400) includes a heating lamp controller (410) for controlling the amount of heating of the heating lamp (100) with respect to the specimen (1); And a vacuum control valve controller 420 for controlling the degree of vacuum in the chamber 200 by opening and closing the vacuum control valve 340.

The high-level simulation test method according to another embodiment of the present invention is characterized in that a pressure sensor and a temperature sensor are connected to a test piece 1, and the test piece 1 is placed in a vacuum state (S100) of fixing to the chamber (200); A controller 400 for controlling a vacuum pump 300 for controlling a heating lamp 100 for heating the specimen 1 and a pressure inside the chamber 200, (S200); Confirming whether the temperature and pressure inside the chamber 200 are controlled according to the pressure profile and the temperature profile (S300); (S400) of placing the infrared radiographic camera (220) of the chamber (200) to start observing the specimen (S400); supplying cooled cooling water to the chamber (200) and recovering the cooling water heated in the chamber (S600) of starting the elevation simulation test for the specimen 1 by controlling the temperature and pressure inside the chamber 200 according to the pressure profile and the temperature profile, And logging (S700) real-time pressure and temperature data after the end of the test,
The chamber 200 includes a specimen mounting hole 210 formed at a front central portion thereof; And an observation window 230 formed on the rear surface so as to observe the temperature distribution of the specimen 1 by using the infrared thermography camera 220. The specimen 1 A specimen fixing plate 240 for fixing the specimen fixing plate 240; A sealing member 250 surrounding the specimen mounting hole 210 and interposed between the inner surface of the specimen fixing plate 240 and the chamber 200; A first cooling water conduit 261 formed to communicate with upper and lower surfaces of both sides of the chamber 200 to cool the chamber 200; A second cooling water conduit 262 formed on the outer surface of the specimen fixing plate 240 along the sealing member 250 to prevent the sealing member 250 from being deteriorated; A cover 280 for fixing the specimen fixing plate 240 and the second cooling water conduit 262 to the chamber 200 by a plurality of clamps 270; And a vent valve (290) formed at the lower rear of the chamber (200) for discharging the air inside the chamber (200) to the outside of the chamber (200) when the inside of the chamber .

In the step S600 of starting the altitude simulation test, the large capacity vacuum pump 310 of the vacuum pump 300 is used to depress the pressure of the large capacity vacuum pump 310 to a predetermined ratio of the target degree of vacuum, And the pressure of the vacuum is reduced to a target degree of vacuum by selectively using the precision vacuum pump 320 of the vacuum pump 300.

The step S600 of starting the elevation simulation test is characterized in that the specimen 1 is heated by either heating or convection depending on the inputted pressure profile and temperature profile.

As described above, according to the present invention, the specimen is heated in a low vacuum (760 to 1 Torr) state in a closed chamber, so that the convection heat transfer can be prevented and the heating amount according to the altitude can be accurately simulated.

Further, according to the present invention, the test data obtained only through the direct test in the air-lean environment can be acquired through the ground test equipment simulating the same environment, thereby reducing the cost of performing the test .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining the entire structure of a high-level simulation test apparatus according to an embodiment of the present invention; FIG.
FIGS. 2 to 4 are a sectional view, a left side view, and a front view of an apparatus for testing an altitude according to an embodiment of the present invention.
5 is a flowchart of an altitude simulation test method according to another embodiment of the present invention.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term to describe its invention in the best way And should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view for explaining the overall structure of an apparatus for testing an altimeter according to an embodiment of the present invention, and FIGS. 2 to 4 are a sectional view, a left side view, and a front view, respectively, of an apparatus for testing an altimeter according to an embodiment of the present invention . Referring to FIGS. 1 to 5, an apparatus for testing an elevation profile according to an embodiment of the present invention includes a heating lamp 100 for heating a specimen 1; A chamber 200 in which a test environment of the specimen 1 can be formed in a vacuum state; A vacuum pump 300 for changing the pressure inside the chamber 200; A controller 400 for controlling the heating lamp 100 and the vacuum pump 300; And a cooler 500 for supplying the cooled cooling water to the chamber 200 and recovering the heated cooling water in the chamber 200.

The elevation simulation apparatus includes a moving rail 110 attached to a lower end of the heating lamp 100 and capable of adjusting a distance from the chamber 200 to the heating lamp 100 . This is because it is necessary to move the heating lamp 100 to open or close the lid 280 of the chamber 200 when the test piece 1 is installed or removed.

The chamber 200 includes a specimen mounting hole 210 formed at a front central portion thereof; And an observation window 230 formed on the rear surface so as to observe the temperature distribution of the specimen 1 using the infrared thermography camera 220.

The high-level simulation testing apparatus includes a specimen fixing plate 240 for fixing the specimen 1 inside the specimen mounting hole 210; A sealing member 250 surrounding the specimen mounting hole 210 and interposed between the inner surface of the specimen fixing plate 240 and the chamber 200; A first cooling water conduit 261 formed to communicate with upper and lower surfaces of both sides of the chamber 200 to cool the chamber 200; A second cooling water conduit 262 formed on the outer surface of the specimen fixing plate 240 along the sealing member 250 to prevent the sealing member 250 from being deteriorated; A cover 280 for fixing the specimen fixing plate 240 and the second cooling water conduit 262 to the chamber 200 by a plurality of clamps 270; And a vent valve (290) formed at the lower rear of the chamber (200) for discharging the air inside the chamber (200) to the outside of the chamber (200) when the inside of the chamber .

That is, the sealing member 250 functions to prevent the external air from flowing into the chamber 200 and to maintain the degree of vacuum in the chamber 200. The first cooling water conduit 261 protects the chamber 200 from the high temperature generated by the heating lamp 100. The second cooling water conduit 262 serves as a heat shield for the sealing member 250, thereby preventing the sealing member 250 from being deteriorated. At the same time, it also serves to fix the specimen fixing plate 240. During the test, cooling water is continuously supplied from the cooler 500, and the heat-exchanged cooling water is recovered to the cooler 500 without delay through the pipe. The vent valve 290 serves to safely open the lid 280 after controlling the internal pressure of the chamber 200 to the atmospheric pressure at the end of the test.

And the second cooling water conduit 262 includes a flap 263 opened at a predetermined temperature or higher. That is, in order to prevent the sealing member 250 from being opened at a predetermined temperature or more, the flap 263 is opened to allow the cooling water to flow into the second cooling water conduit 262. The predetermined temperature may be set differently depending on the type of the sealing member 250 and the like. The flap 263 may be opened or closed by a shape memory alloy or the like, or may be opened or closed by a separate actuator.

The vacuum pump (300) includes a large capacity vacuum pump (310) which performs depressurization to a predetermined ratio of the target degree of vacuum; A precision vacuum pump 320 for reducing pressure to the target degree of vacuum after depressurization by the large capacity vacuum pump 310; And a flow path 330 for communicating the chamber 200, the large capacity vacuum pump 310 and the precision vacuum pump 320 so that the large capacity vacuum pump 310 and the precision vacuum pump 320 can be selectively used. And a vacuum control valve 340 for opening and closing the vacuum control valve 340. At this time, the pressure is reduced to a predetermined ratio (for example, 90%) of the target vacuum degree by the large capacity vacuum pump 310, and the final remaining ratio (for example, 10%) of the target degree of vacuum is corrected by the vacuum chamber controller 340 The vacuum pump 320 and the large-capacity vacuum pump 310 are selectively used to reduce the pressure. This is because it is difficult for the precision vacuum pump 320 to rapidly depressurize to simulate the actual environment, and it is difficult to precisely control the pressure by using the large capacity vacuum pump 320 alone.

The controller (400) includes a heating lamp controller (410) for controlling the amount of heating of the heating lamp (100) with respect to the specimen (1); And a vacuum control valve controller 420 for controlling the degree of vacuum in the chamber 200 by opening and closing the vacuum control valve 340.

5 is a flowchart of an altitude simulation test method according to another embodiment of the present invention. Referring to FIG. 5, an elevation simulation test method according to another embodiment of the present invention includes connecting a pressure sensor and a temperature sensor to the specimen 1, fixing the specimen 1 to the chamber 200 (S100); Inputting a pressure profile and a temperature profile to be altogether to the controller 400 (S200); Confirming whether the temperature and pressure inside the chamber 200 are controlled according to the pressure profile and the temperature profile (S300); Disposing the infrared radiographic camera 220 to start observing the specimen (S400); Operating the cooler 500 (S500); (S600) of controlling the temperature and pressure inside the chamber (200) in accordance with a pressure profile and a temperature profile to initiate an elevation simulation test for the specimen (1); And logging real-time pressure and temperature data (S700) after the end of the test.

In the step S600 of starting the altitude simulation test, the large-capacity vacuum pump 310 and the precise vacuum pump 320 are selectively operated by reducing the pressure of the large-capacity vacuum pump 310 to a predetermined ratio of the target degree of vacuum, To a target degree of vacuum. That is, the vacuum degree of the chamber 200 is controlled according to the pressure profile inputted at the test, the pressure change is simulated, and the heating amount of the heating lamp 100 is controlled according to the input temperature profile to simulate the heating amount change. At this time, the pressure is reduced to a predetermined ratio (for example, 90%) of the target vacuum degree by the large capacity vacuum pump 310, and the final remaining ratio (for example, 10%) of the target degree of vacuum is corrected by the vacuum chamber controller 340 The vacuum pump 320 and the large-capacity vacuum pump 310 are selectively used to reduce the pressure. This is because it is difficult for the precision vacuum pump 320 to rapidly depressurize to simulate the actual environment, and it is difficult to precisely control the pressure by using the large capacity vacuum pump 320 alone.

The step S600 of starting the elevation simulation test is characterized in that the specimen 1 is heated by any one of a heating method of radiation or convection according to the inputted pressure profile. In other words, when the pressure profile is set to a vacuum condition, heat transfer due to convection does not occur inside the chamber 200, so the sample is heated by radiation by radiation. In addition, when the pressure profile is set to a condition other than a vacuum, the specimen can be heated by the convection inside the chamber 200.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory only and are not restrictive of the invention, as claimed, and will be fully understood by those of ordinary skill in the art. The present invention is not limited thereto. It will be apparent to those skilled in the art that various substitutions, modifications and variations are possible within the scope of the present invention, and it is obvious that those parts easily changeable by those skilled in the art are included in the scope of the present invention .

1 The Psalms
100 heating lamp
110 moving rails
200 chamber
210 Specimen mounting hole
220 Infrared Thermal Camera
230 Observation Window
240 Specimen plate
250 sealing member
261 First cooling water pipe
262 Second cooling water pipe
263 flap
270 clamp
280 Cover
290 vent valve
300 vacuum pump
310 Large capacity vacuum pump
320 Precision Vacuum Pump
330 euros
340 Vacuum control valve
400 controller
410 heating lamp controller
420 Vacuum Regulating Valve Controller
500 cooler

Claims (10)

A heating lamp (100) for heating the specimen (1);
A chamber 200 in which a test environment of the specimen 1 can be formed in a vacuum state;
A vacuum pump 300 for changing the pressure inside the chamber 200;
A controller 400 for controlling the heating lamp 100 and the vacuum pump 300; And
And a cooler (500) for supplying the cooled cooling water to the chamber (200) and recovering the heated cooling water in the chamber (200)
The chamber 200 includes a specimen mounting hole 210 formed at a front central portion thereof; And
And an observation window (230) formed on the rear surface so as to observe the temperature distribution of the specimen (1) by using the infrared ray camera (220)
A specimen fixing plate 240 for fixing the specimen 1 inside the specimen mounting hole 210;
A sealing member 250 surrounding the specimen mounting hole 210 and interposed between the inner surface of the specimen fixing plate 240 and the chamber 200;
A first cooling water conduit 261 formed to communicate with upper and lower surfaces of both sides of the chamber 200 to cool the chamber 200;
A second cooling water conduit 262 formed on the outer surface of the specimen fixing plate 240 along the sealing member 250 to prevent the sealing member 250 from being deteriorated;
A cover 280 for fixing the specimen fixing plate 240 and the second cooling water conduit 262 to the chamber 200 by a plurality of clamps 270; And
A vent valve (290) formed at the lower rear of the chamber (200) to discharge air inside the chamber (200) to the outside of the chamber (200) when the inside of the chamber (200) is in an overpressure state;
Wherein the apparatus further comprises: The method according to claim 1,
A moving rail 110 attached to a lower end of the heating lamp 100 and capable of adjusting a distance from the chamber 200 to the heating lamp 100;
Wherein the apparatus further comprises: delete delete The method according to claim 1,
The second cooling water conduit 262 has a flap 263 opened at a predetermined temperature or higher;
Wherein the apparatus further comprises: The method according to claim 1,
The vacuum pump (300)
A large capacity vacuum pump 310 for reducing the pressure to a predetermined ratio of the target vacuum degree;
A precision vacuum pump 320 for reducing pressure to the target degree of vacuum after depressurization by the large capacity vacuum pump 310; And
The flow path 330 communicates the chamber 200, the large capacity vacuum pump 310 and the precision vacuum pump 320 so that the large capacity vacuum pump 310 and the precision vacuum pump 320 can be selectively used. A vacuum control valve 340 for opening and closing the vacuum control valve 340;
Wherein the apparatus further comprises: The method according to claim 6,
The controller (400)
A heating lamp controller 410 for controlling the heating amount of the heating lamp 100 with respect to the specimen 1; And
A vacuum control valve controller 420 for controlling the degree of vacuum in the chamber 200 by opening and closing the vacuum control valve 340;
Wherein the apparatus further comprises: In an elevation simulation test method using an elevation simulation testing apparatus,
Connecting a pressure sensor and a temperature sensor to the specimen 1 and fixing the specimen 1 to a chamber 200 capable of forming a test environment of the specimen 1 in a vacuum state S100;
A controller 400 for controlling a vacuum pump 300 for controlling a heating lamp 100 for heating the specimen 1 and a pressure inside the chamber 200, (S200);
Confirming whether the temperature and pressure inside the chamber 200 are controlled according to the pressure profile and the temperature profile (S300);
Disposing the infrared radiographic camera 220 of the chamber 200 to start observation of the specimen (S400);
(S500) operating the cooler (500) to supply the cooling water to the chamber (200) and recover the heated cooling water in the chamber (200);
(S600) of controlling the temperature and pressure inside the chamber (200) in accordance with a pressure profile and a temperature profile to initiate an elevation simulation test for the specimen (1); And
(S700) of logging real-time pressure and temperature data after the end of the test,
The chamber 200 includes a specimen mounting hole 210 formed at a front central portion thereof; And
And an observation window (230) formed on the rear surface so as to observe the temperature distribution of the specimen (1) by using the infrared ray camera (220)
A specimen fixing plate 240 for fixing the specimen 1 inside the specimen mounting hole 210;
A sealing member 250 surrounding the specimen mounting hole 210 and interposed between the inner surface of the specimen fixing plate 240 and the chamber 200;
A first cooling water conduit 261 formed to communicate with upper and lower surfaces of both sides of the chamber 200 to cool the chamber 200;
A second cooling water conduit 262 formed on the outer surface of the specimen fixing plate 240 along the sealing member 250 to prevent the sealing member 250 from being deteriorated;
A cover 280 for fixing the specimen fixing plate 240 and the second cooling water conduit 262 to the chamber 200 by a plurality of clamps 270; And
A vent valve (290) formed at the lower rear of the chamber (200) to discharge air inside the chamber (200) to the outside of the chamber (200) when the inside of the chamber (200) is in an overpressure state;
Wherein the high altitude simulation test method comprises the steps of: 9. The method of claim 8,
In the step S600 of starting the altitude simulation test, the vacuum pump 300 is depressurized to a predetermined ratio of the target degree of vacuum using the large capacity vacuum pump 310, (300) is selectively depressurized to a target degree of vacuum. 9. The method of claim 8,
Wherein the step (S600) of starting the elevation simulation test is to heat the specimen (1) by any one of the heating method of radiation or convection according to the inputted pressure profile and temperature profile.
KR1020150150767A 2015-10-29 2015-10-29 Test apparatus for altitude simulation and test method therefor KR101692824B1 (en)

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CN111678942A (en) * 2020-05-08 2020-09-18 江苏禹治流域管理技术研究院有限公司 Testing device and testing method for wet expansion coefficient of fiber composite material
CN113899576A (en) * 2021-10-11 2022-01-07 江南造船(集团)有限责任公司 Measuring device and measuring method for measuring convective heat transfer coefficient of ship cabin
CN115783319A (en) * 2022-12-30 2023-03-14 中国科学院地质与地球物理研究所 Ultrahigh vacuum low-temperature sample transfer operation experiment system
WO2023070779A1 (en) * 2021-10-27 2023-05-04 中国南方电网有限责任公司超高压输电公司检修试验中心 Vacuum arc-extinguishing chamber test system for transformer on-load tap-changer and method therefor

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