WO2022230083A1 - Dispositif et procédé de test - Google Patents

Dispositif et procédé de test Download PDF

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Publication number
WO2022230083A1
WO2022230083A1 PCT/JP2021/016890 JP2021016890W WO2022230083A1 WO 2022230083 A1 WO2022230083 A1 WO 2022230083A1 JP 2021016890 W JP2021016890 W JP 2021016890W WO 2022230083 A1 WO2022230083 A1 WO 2022230083A1
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WO
WIPO (PCT)
Prior art keywords
sample
temperature
thermometer
test
radiation thermometer
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PCT/JP2021/016890
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English (en)
Japanese (ja)
Inventor
梓 石井
真悟 峯田
宗一 岡
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日本電信電話株式会社
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Priority to JP2023516928A priority Critical patent/JPWO2022230083A1/ja
Priority to PCT/JP2021/016890 priority patent/WO2022230083A1/fr
Publication of WO2022230083A1 publication Critical patent/WO2022230083A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light

Definitions

  • the present invention relates to a test device and method for evaluating weather resistance.
  • the accelerated weather resistance test is a test in which deterioration due to light or water is accelerated by irradiating a sample with light from an artificial light source or spraying water (Non-Patent Document 1).
  • the test generally repeats a test cycle composed of a plurality of steps, such as a step of light irradiation only, a step of performing light irradiation and water spray simultaneously, and the like.
  • the apparatus for conducting the above-described test has a light source placed in the center of the test tank, and a rotating sample holder is placed surrounding this light source (see Non-Patent Document 1, Figures 1 and 15).
  • a radiometer and a black panel thermometer are also installed in a part of the sample holder.
  • a radiometer receives light from a light source to measure irradiance, and the light source is controlled such that the measured irradiance approaches a set value.
  • the black panel thermometer is attached to a stainless steel panel painted black to simulate a black sample. The temperature measured by the black panel thermometer is called the black panel temperature.
  • the test apparatus also includes a heater that heats the air inside the test layer, a humidifier that humidifies the air inside the test layer, and a blower that circulates the air inside the test layer. By circulating the air in the test tank with a blower, it contributes to making the temperature and humidity of the air in the test tank uniform.
  • the test apparatus also includes an in-chamber temperature measurement section for measuring the temperature inside the test layer (in-chamber temperature) and an in-chamber humidity measurement section for measuring the humidity inside the test layer (in-chamber humidity).
  • the controller controls the operation of the heater, the humidifier, and the blower so that the black panel temperature, the temperature inside the tank, and the humidity inside the tank approach the set values.
  • the test chamber may also have a water sprayer (sample sprayer) for spraying the sample with water.
  • Test conditions can be entered from the test condition input section, and settings such as light irradiation intensity, black panel temperature, chamber temperature, chamber humidity, presence/absence of water spray, time, and number of repetitions of the test cycle can be set for each test step. It is said that
  • Sunshine carbon arc lamps, ultraviolet carbon arc lamps, xenon arc lamps, metal halide lamps, mercury lamps, ultraviolet fluorescent lamps, etc. are generally used as light sources for accelerated weathering testers (Non-Patent Documents 1 and 2).
  • the xenon arc lamp which has a spectral distribution similar to sunlight, has been widely used in recent years.
  • the light irradiation intensity of the light source can be set to any value, and is generally set to 40 W/m 2 to 180 W/m 2 for light of 300 nm to 400 nm.
  • These light sources are typically cooled with cooling water and have a lamp cooling mechanism that circulates the cooling water.
  • the cylindrical sample holder has a plurality of sample placement portions on which the samples to be tested are placed on the inner surface of the tube, and the sample is fitted into the frame-shaped sample placement portion. It is configured to be fixed with A light source is arranged at the center of the tube of the frame-shaped sample holder, and each sample fixed to each of the plurality of sample mounting portions is arranged so as to surround the light source. In the test, the sample holder rotates around the light source at a constant speed so that the light from the light source and the water jetted from the water sprayer hit each sample evenly.
  • the temperature inside the tank and the black panel temperature can be set as test conditions related to temperature. It is believed that if the black panel temperature is set to an arbitrary value, the sample temperature will also be approximately set to a specific value. However, experiments conducted by the inventors revealed that the sample temperature could not be determined to a specific value when a test was conducted in which only the light irradiation intensity was changed while the temperature inside the chamber and the black panel temperature were fixed.
  • a test piece coated with white paint or a plastic plate was used as a test body, and the temperature inside the tank and the black panel temperature were fixed, and only the light irradiation intensity was changed. Temperature was measured. In this test, the lower the light irradiation intensity, the lower the sample temperature, and the higher the light irradiation intensity, the higher the sample temperature. This indicates that even if the chamber internal temperature and the black panel temperature are fixed, the sample surface temperature changes depending on the sample depending on the light irradiation intensity. As described above, conventionally, in a test for accelerating deterioration by light, there has been a problem that the temperature of the sample cannot be adjusted to the temperature under the set test conditions.
  • the present invention was made to solve the above problems, and aims to bring the temperature of the sample to the temperature of the set test conditions in the test that accelerates the deterioration due to light.
  • a test apparatus includes a constant temperature bath, a heater for heating the air inside the constant temperature bath, and a cylindrical shape disposed inside the constant temperature bath, and a sample to be tested is placed on the inner surface of the cylinder.
  • a rotating sample stage that rotates around the center of the cylinder; a black panel thermometer that is arranged on the inner surface of the cylinder of the rotating sample stage; and a black panel thermometer that is located at the center of rotation of the rotating sample stage.
  • thermometer that individually measures the surface temperature of the sample placed on the sample placement part of the rotating sample table, the measurement result of the black panel thermometer, the measurement result of the in-bath thermometer, and the radiation thermometer and a controller for controlling the surface temperature of the sample mounted on the sample mounting part so that the measurement result of the radiation thermometer becomes the set sample temperature based on the measurement result of (1).
  • a rotating sample table is placed inside a constant temperature chamber for conducting a weather resistance test, has a cylindrical shape, has a plurality of sample mounting parts on the inner surface of the cylinder, and rotates around the cylinder.
  • a first step of placing the sample on the sample placing portion, a second step of irradiating the sample with light for the weather resistance test, and a measurement result by a black panel thermometer arranged on the inner surface of the cylinder of the rotating sample table The measurement results of the temperature inside the constant temperature bath and the measurement results of the surface temperature of the sample by the radiation thermometer placed between the cylinder inner surface of the rotating sample stage and the light source and placed on the sample mounting part of the rotating sample stage are also shown. and a third step of controlling the surface temperature of the sample placed on the sample placement part so that the measurement result of the radiation thermometer is the set sample temperature.
  • the radiation thermometer is provided for individually measuring the surface temperature of the sample placed on the sample placement portion of the rotating sample table, in the test that accelerates deterioration due to light,
  • the temperature of the sample can be set to the temperature of the test conditions.
  • FIG. 1A is a configuration diagram showing the configuration of a test apparatus according to Embodiment 1 of the present invention.
  • FIG. 1B is a configuration diagram showing a partial configuration of the test apparatus according to Embodiment 1 of the present invention.
  • FIG. 2 is a characteristic diagram showing an example of temperature measurement results by the radiation thermometer 108.
  • FIG. 3 is a configuration diagram showing the configuration of a test apparatus according to Embodiment 2 of the present invention.
  • test apparatus according to an embodiment of the present invention will be described below.
  • This test apparatus is an apparatus for conducting an accelerated weather resistance test, and includes a constant temperature bath 101, a heater 102, a rotating sample table 103, a black panel thermometer 105, a light source 106, a bath thermometer 107, a radiation thermometer 108, A controller 109 is provided.
  • the heater 102 heats the air inside the constant temperature bath 101 .
  • the rotating sample table 103 is arranged inside the constant temperature bath 101 and has a cylindrical shape.
  • the rotating sample table 103 is a cylinder having a dodecagonal shape in cross section, and has a dodecagonal prism shape.
  • the rotary sample stage 103 includes a plurality of sample placement portions 104 on which samples 131 to be tested are placed on the inner surface of the cylinder.
  • the sample 131 can be fixed by fitting it in the frame of the sample mounting portion 104 .
  • a sample mounting portion 104 is provided for each side of the dodecagonal prism of the rotating sample stage 103 .
  • the rotating sample table 103 is rotated around the cylinder by a rotating mechanism (not shown).
  • the black panel thermometer 105 is arranged on the inner surface of the rotating sample table 103 .
  • a black panel thermometer 105 is arranged on one of the sample mounting portions 104 .
  • the black panel thermometer 105 is composed of a stainless plate painted black and a temperature sensor provided on this surface.
  • the black panel thermometer 105 is provided with a plastic (PVDF) heat insulating material attached to the back surface of a stainless steel plate painted black, and a temperature sensor can be arranged between the stainless steel plate and the heat insulating material.
  • PVDF plastic
  • the light source 106 is arranged at the center of rotation of the rotating sample stage 103 and irradiates the black panel thermometer 105 and the sample 131 placed on the sample placement section 104 with light for the weather resistance test.
  • the illumination intensity of the light source 106 is measured by the radiometer 111, and the operation (output) is controlled by the light source control unit 112 using this measurement result.
  • the light source 106 can be composed of, for example, a sunshine carbon arc lamp, an ultraviolet carbon arc lamp, a xenon arc lamp, a metal halide lamp, a mercury lamp, an ultraviolet fluorescent lamp, or the like (Non-Patent Documents 1 and 2).
  • a sunshine carbon arc lamp an ultraviolet carbon arc lamp, a xenon arc lamp, a metal halide lamp, a mercury lamp, an ultraviolet fluorescent lamp, or the like
  • a xenon arc lamp having a spectral distribution similar to sunlight has been widely used in recent years.
  • the light irradiation intensity of the light source 106 can be set to any value, and is generally set to 40 W/m 2 to 180 W/m 2 for light of 300 nm to 400 nm.
  • the light source 106 is provided with a lamp cooling mechanism that circulates cooling water, although not shown, so that it can be cooled.
  • the bath thermometer 107 measures the temperature inside the constant temperature bath 101 .
  • the radiation thermometer 108 measures the surface temperature of the plurality of samples 131 placed on the sample placement portion 104 of the rotating sample stage 103 without contact.
  • the radiation thermometer 108 is arranged between the cylinder inner surface of the rotary sample table 103 and the light source 106 .
  • the radiation thermometer 108 individually measures the surface temperatures of the plurality of samples 131 .
  • the radiation thermometer 108 can be composed of an infrared detection element.
  • the radiation thermometer 108 can also be composed of a thermal image sensor that arranges infrared detection elements two-dimensionally and measures the two-dimensional temperature distribution of the measurement area.
  • the controller 109 Based on the measurement result of the black panel thermometer 105, the measurement result of the in-bath thermometer 107, and the measurement result of the radiation thermometer 108, the controller 109 adjusts the measurement result of the radiation thermometer 108 to the set sample temperature.
  • the surface temperature of the sample placed on the sample placement part 104 is controlled so that For example, the controller 109 controls the surface temperature of the sample by controlling the heater 102 .
  • the test apparatus can also include a blower 110 for generating an airflow inside the cylinder of the rotating sample stage 103 .
  • the blower 110 is a blower provided at the bottom of a constant temperature bath for controlling the temperature inside the bath and the black panel temperature, which is used in conventional general weather resistance test equipment (not shown, see Non-Patent Document 1). In addition to , it is newly provided (added) in the present invention. In this case, in addition to controlling the heater 102 described above, the controller 109 controls the amount of air blown by the blower 110, etc., so that the measurement result of the radiation thermometer 108 becomes the set sample temperature. to control.
  • this testing device includes a humidifier 113 and a hygrometer 114.
  • the controller 109 controls the humidifier 113 based on the measurement result of the hygrometer 114 to set the temperature inside the constant temperature bath 101 to the set humidity. Further, the controller 109 controls the operation of the rotating mechanism of the rotating sample stage 103 so that the rotation speed of the rotating sample stage 103 reaches a set value. Further, the controller 109 can store each measurement result in a storage device (not shown) and display it on a display device (not shown) arranged outside the constant temperature bath 101 .
  • an accelerated weather resistance test can be carried out by the method shown below.
  • a plurality of sample mounts are placed on a rotary sample table 103 which is arranged inside a constant temperature chamber 101 in which a weather resistance test is performed, has a cylindrical shape, has a plurality of sample mounts 104 on the inner surface of the cylinder, and rotates around the center of the cylinder.
  • a sample 131 is placed on each placement part 104 (first step).
  • the sample is irradiated with light for a weather resistance test (second step).
  • the results of measurement by the black panel thermometer 105 arranged on the inner surface of the cylinder of the rotary sample stage 103, the results of the measurement of the temperature inside the constant temperature bath 101, and the measurement results of the temperature inside the cylinder of the rotary sample stage 103 and the light source 106 are measured.
  • the measurement result of the radiation thermometer 108 is adjusted to the set sample temperature.
  • to control the surface temperature of the sample placed on the sample placement portion 104 (third step).
  • the surface temperature of the sample is controlled.
  • the surface temperature of the sample is controlled so that the measurement result of the radiation thermometer 108 is the set sample temperature by controlling the amount of air blown by the blower 110 and the like.
  • the humidifier 113 is controlled to set the temperature inside the constant temperature bath 101 to the set humidity. The temperature condition, humidity condition, and light irradiation set as described above are continued for the set time.
  • the sample placement portion in the rotation direction of the rotary sample stage 103 is centered on the point on the cylinder inner surface side of the rotary sample stage 103 on an imaginary straight line passing through the installation position of the light source 106 and the installation position of the radiation thermometer 108.
  • the width range of 104 can be the temperature measurement range of radiation thermometer 108 .
  • the controller 109 uses the measurement results obtained by the radiation thermometer 108 when the sample mounting section 104 is positioned within the temperature measurement range.
  • the rotation of the rotating sample table 103 is controlled by a controller 109, and if the temperature measurement range of the radiation thermometer 108 is set in the controller 109 in advance, the above-described measurement control can be performed.
  • the controller 109 controls the radiation thermometer 108 to perform measurement when the sample placement section 104 is positioned within the temperature measurement range. Further, the controller 109 uses the result of the measurement by the radiation thermometer 108 for heater control when the sample mounting portion 104 is positioned within the temperature measurement range.
  • the controller 109 controls the heater 102 .
  • the temperature measurement of the surface of the sample 131 near the center is used for controlling the heater 102. be able to.
  • the controller 109 can use the measured value for which the temperature measured by the radiation thermometer 108 has a longer time to remain substantially constant as the measurement result of the radiation thermometer 108 . Since each sample 131 rotates together with the rotating sample stage 103, the temperature measurement results by the radiation thermometer 108 include a state where the surface temperature of the sample 131 is measured and a state where the surface temperature of the sample 131 is measured, as shown in FIG. A state in which the temperature in the region of . is being measured appears alternately. Generally, for the purpose of arranging more samples, the space between samples adjacent to each other in the direction of rotation is narrowed as much as possible.
  • the time between t2 and t3 during which the surface temperature of the sample 131 is measured is longer than the time between t1 and t2 and between t3 and t4 during which the temperature of the region other than the sample 131 is measured. Therefore, the surface temperature of the sample 131 can be assumed to be the measured value for which the temperature measured by the radiation thermometer 108 has a longer period of time during which the temperature remains substantially constant.
  • the temperature of the sample in a test that accelerates degradation due to light, the temperature of the sample can be measured even when the light irradiation intensity is changed. It becomes possible to
  • This test apparatus includes a constant temperature bath 101, a heater 102, a rotating sample stage 103, a sample mounting portion 104, a black panel thermometer 105, a light source 106, a bath thermometer 107, a radiation thermometer 108, a controller 109, a radiometer 111, A light source controller 112 , a humidifier 113 and a hygrometer 114 are provided. These configurations are the same as those of the first embodiment described above.
  • Embodiment 2 further includes a camera 115 that captures an image of the inner surface of the rotating sample stage 103 on which the sample placement section 104 is provided, and an image processing circuit that identifies the sample placement section 104 from the image captured by the camera 115. 116.
  • the camera 115 can be, for example, a so-called digital camera composed of an area image sensor.
  • the controller 109 uses the result of measurement performed by the radiation thermometer 108 when the image processing circuit 116 recognizes the sample placement section 104 .
  • the image processing circuit 116 is set with a reference image obtained by previously imaging the sample placement section 104 on which the sample 131 is fixed.
  • the image processing circuit 116 detects a portion in the picked-up image in which the degree of matching with the reference image in pattern recognition is equal to or greater than the set value, the image processing circuit 116 changes the sample placement section 104 on which the sample 131 is placed. It can be identified (specified). By doing so, it is possible to prevent the controller 109 from using the temperature measurement result of the sample other than the sample 131 to control the surface temperature of the sample placed on the sample placement unit 104 .
  • the temperature of the sample can be measured even when the light irradiation intensity is changed. It becomes possible to
  • the test apparatus according to Embodiments 1 and 2 described above can further include a temperature controller for cooling the sample placed on the sample placement section 104 . It may be difficult to control the sample temperature with the heater 102 and the blower 110 depending on the combination of the set values of the light irradiation intensity, the temperature inside the chamber, and the sample surface temperature. Therefore, in order to more closely control the sample temperature, a temperature controller can be provided that cools or heats the sample from the backside of the sample.
  • a sample was prepared by applying a urethane resin paint to a thickness of 50 ⁇ m on a steel plate material having a planar shape of 7 cm ⁇ 15 cm.
  • the set conditions for the accelerated weather resistance test were light irradiation intensity IW/m 2 (wavelength 300 nm to 400 nm), black panel temperature BPT°C, and chamber temperature CT°C.
  • An accelerated weather resistance test was conducted by operating the weather resistance test apparatus under these conditions for 1 hour, and the sample surface temperature ST°C was measured.
  • the sample surface temperature ST°C was measured while the air blower 110 was in operation.
  • a conventional blower was also operated at the bottom of the constant temperature bath for controlling the temperature inside the bath and the temperature of the black panel.
  • Table 1 the state in which the fan 110 according to the invention is also in operation is indicated as "with" the additional fan.
  • No additional blower is a condition in which the blower 110 according to the invention is not operated and a conventional blower is operated.
  • Test conditions 1, 2, and 5 were tests in which only the light irradiation intensity I was changed, but it was confirmed that the sample surface temperature increased as the light irradiation intensity I increased. Therefore, when the blower 110 that generates an air flow inside the cylinder of the rotating sample table is operated, the sample temperature can be lowered to 40° C. under test condition 3, which is the same as under test condition 1, and the blower 110 controls the sample surface temperature. It was confirmed that it is possible. In test condition 5, where I is larger than in test condition 3, the sample surface temperature was lower than in test condition 4 due to the operation of the blower 110, but could not be lowered to the same temperature as in test condition 1.
  • test condition 6 when a temperature controller consisting of a Peltier element is attached to the back surface of the sample and the test is performed while cooling the sample from the back surface, the sample surface temperature can be controlled to 40° C. It was found that cooling from the back side of the sample is effective for controlling the surface temperature of the sample.
  • a Peltier element is used as the temperature controller, but it can be easily analogized that a heat sink or a temperature controller by circulating cold/hot water can also be used.
  • the radiation thermometer is provided for individually measuring the surface temperature of the sample placed on the sample placement portion of the rotating sample table, the temperature of the sample can be accelerated in a test that accelerates deterioration due to light. , the temperature of the sample can be set to the temperature of the test conditions.
  • DESCRIPTION OF SYMBOLS 101 Constant temperature bath, 102... Heater, 103... Rotating sample stand, 104... Sample mounting part, 105... Black panel thermometer, 106... Light source, 107... In-bath thermometer, 108... Radiation thermometer, 109... Controller, DESCRIPTION OF SYMBOLS 110... Air blower, 111... Radiometer, 112... Light source control part, 113... Humidifier, 114... Hygrometer, 131... Sample.

Abstract

Dans la présente invention, un dispositif de chauffage (102) chauffe l'air à l'intérieur d'un réservoir thermostatique (101). Un support d'échantillon rotatif (103) est disposé à l'intérieur du réservoir thermostatique (101), présente une forme cylindrique et comprend une pluralité de sections de placement d'échantillon (104) sur lesquelles des échantillons (131) à tester sont placés sur la surface interne cylindrique. Un thermomètre à panneau noir (105) est disposé sur la surface interne cylindrique du support d'échantillon rotatif (103). Une source de lumière (106) est positionnée au centre de rotation du support d'échantillon rotatif (103) et expose le thermomètre à panneau noir (105) et les échantillons (131) placés sur les sections de placement d'échantillon (104) à de la lumière afin de tester la résistance aux intempéries. Un thermomètre (107) dans le réservoir mesure la température à l'intérieur du réservoir thermostatique (101). Un thermomètre à rayonnement (108) effectue une mesure sans contact des températures de surface de la pluralité d'échantillons (131) placés sur les sections de placement d'échantillon (104).
PCT/JP2021/016890 2021-04-28 2021-04-28 Dispositif et procédé de test WO2022230083A1 (fr)

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JP2023516928A JPWO2022230083A1 (fr) 2021-04-28 2021-04-28
PCT/JP2021/016890 WO2022230083A1 (fr) 2021-04-28 2021-04-28 Dispositif et procédé de test

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08210967A (ja) * 1994-11-14 1996-08-20 Suga Test Instr Co Ltd 促進耐候光試験機
JP2005091366A (ja) * 2003-09-18 2005-04-07 Atlas Material Testing Technology Gmbh 自然にもしくは人工的に暴露させる試料表面温度の非接触測定方法及びそのための装置
JP2015099113A (ja) * 2013-11-20 2015-05-28 日本電信電話株式会社 促進耐候性試験方法および装置
CN109580470A (zh) * 2018-12-31 2019-04-05 盐城蓝天试验设备有限公司 一种水冷式氙灯试验箱
JP2020173119A (ja) * 2019-04-08 2020-10-22 三菱電機株式会社 試験装置および試験方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08210967A (ja) * 1994-11-14 1996-08-20 Suga Test Instr Co Ltd 促進耐候光試験機
JP2005091366A (ja) * 2003-09-18 2005-04-07 Atlas Material Testing Technology Gmbh 自然にもしくは人工的に暴露させる試料表面温度の非接触測定方法及びそのための装置
JP2015099113A (ja) * 2013-11-20 2015-05-28 日本電信電話株式会社 促進耐候性試験方法および装置
CN109580470A (zh) * 2018-12-31 2019-04-05 盐城蓝天试验设备有限公司 一种水冷式氙灯试验箱
JP2020173119A (ja) * 2019-04-08 2020-10-22 三菱電機株式会社 試験装置および試験方法

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