WO2022230083A1 - Testing device and method - Google Patents

Testing device and method 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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Prior art keywords
sample
temperature
thermometer
test
radiation thermometer
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PCT/JP2021/016890
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French (fr)
Japanese (ja)
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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 PCT/JP2021/016890 priority Critical patent/WO2022230083A1/en
Priority to JP2023516928A priority patent/JPWO2022230083A1/ja
Publication of WO2022230083A1 publication Critical patent/WO2022230083A1/en

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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.

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Abstract

In the present invention, a heater (102) heats air in the interior of a thermostatic tank (101). A rotating sample stand (103) is disposed in the interior of the thermostatic tank (101), has a cylindrical shape, and comprises a plurality of sample placement sections (104) on which samples (131) to be tested are placed on the cylinder inner surface. A black panel thermometer (105) is disposed on the cylinder inner surface of the rotating sample stand (103). A light source (106) is positioned at the center of rotation of the rotating sample stand (103) and irradiates the black panel thermometer (105) and the samples (131) placed on the sample placement sections (104) with light for testing weather resistance. An in-tank thermometer (107) measures the temperature within the thermostatic tank (101). A radiation thermometer (108) performs non-contact measurement of the surface temperatures of the plurality of samples (131) placed on the sample placement sections (104).

Description

試験装置および方法Test equipment and method
　本発明は、耐候性を評価するための試験装置および方法に関する。 The present invention relates to a test device and method for evaluating weather resistance.
　屋外環境で使用する高分子材料の耐久性評価のために、促進耐候性試験が実施されている。促進耐候性試験は、試料へ人工光源光による光の照射や水の噴霧を行うことで、光や水による劣化を加速させる試験である（非特許文献１）。試験は、光照射のみのステップ、光照射と水噴霧を同時に行うステップなどの複数のステップから構成された試験サイクルを繰り返すことが一般的である。 Accelerated weather resistance tests are being conducted to evaluate the durability of polymeric materials used in outdoor environments. 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.
　上述した試験を実施するための装置は、試験槽の中央に光源を配置し、この光源を囲って、回転式の試料ホルダが配置されている（非特許文献１，図１，１５参照）。また、試料ホルダの一部には、放射計およびブラックパネル温度計が設置されている。放射計は、光源からの光を受光して放射照度を測定し、測定した照度が設定値に近づくよう光源が制御される。ブラックパネル温度計は、黒色試料を模擬して黒色塗装したステンレス製パネルに温度計が取り付けられている。ブラックパネル温度計により測定される温度は、ブラックパネル温度と呼ばれている。 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.
　また、試験装置は、試験層の内部の空気を加熱するヒータ、試験層の内部の空気を加湿する加湿器、試験層の内部の空気を循環させる送風機を備える。送風機によって試験槽内の空気を循環させることで、槽内で、空気の温度・湿度を均一な状態とすることに寄与している。また、試験装置は、試験層の内部の温度（槽内温度）を測定する槽内温度測定部、および試験層の内部の湿度（槽内湿度）を測定する槽内湿度測定部を備える。ブラックパネル温度、槽内温度、槽内湿度が設定値に近づくよう、制御部によって、ヒータ、加湿器、送風機の運転が制御される。また、試験槽内には、試料に水噴霧を行う水噴霧器（試料スプレー）を有する場合もある。 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.
　試験条件は、試験条件入力部から入力でき、各試験のステップにおける光照射強度、ブラックパネル温度、槽内温度、槽内湿度、水噴霧の有無、時間、および試験サイクルの繰り返し回数などが設定可能とされている。 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
　促進耐候性試験装置の光源としては、サンシャインカーボンアークランプ、紫外線カーボンアークランプ、キセノンアークランプ,メタルハライドランプ、水銀ランプ、紫外線蛍光ランプなどが一般的に用いられている（非特許文献１、２）。これらの中でも、太陽光に似た分光分布を有するキセノンアークランプが近年広く用いられている。光源の光照射強度は任意の値に設定可能であり、一般的には、３００ｎｍ－４００ｎｍの光が４０Ｗ／ｍ2～１８０Ｗ／ｍ2となるよう設定されることが多い。これらの光源は、一般には、冷却水を用いて冷却され、冷却水を循環させるランプ冷却機構を有する。 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). . Among these, 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.
　また、筒状とされた回転式の試料ホルダは、筒内面に試験対象となる試料が載置される試料載置部を複数備え、枠状とされた試料載置部に、試料を嵌め込んで固定する構成とされている。枠状の試料ホルダの筒中心に光源が配置され、複数の試料載置部の各々に固定された各試料は、光源を囲むように配置される。試験においては、試料ホルダが光源を中心として一定速度で回転し、光源からの光や、水噴霧器から噴出される水が、各試料に均等に当たるようにされている。 Further, 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.
　ところで、従来の促進耐候性試験は、温度に関する試験条件として、槽内温度およびブラックパネル温度が設定可能である。ブラックパネル温度を任意の値に設定すれば、試料温度も概ね特定の値に定まると考えられている。しかしながら、槽内温度とブラックパネル温度を固定して、光照射強度のみを変更する試験を行うと、試料温度が特定の値に定まらないことが、発明者らの実験により判明した。 By the way, in the conventional accelerated weather resistance test, 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.
　具体的には、白色の塗料を塗装した試験片やプラスチック板を試験体とし、槽内温度とブラックパネル温度を固定して、光照射強度のみを変更した試験を行い、それらの試験中の試料温度を測定した。この試験において、光照射強度が低いほど試料温度も低く、光照射強度が高いほど試料温度も高いという結果が得られた。これは、槽内温度およびブラックパネル温度を固定しても、試料によっては光照射強度に応じて試料表面温度が変化することを示している。このように、従来、光による劣化を加速させる試験において、試料の温度を、設定した試験条件の温度にすることができないという問題があった。 Specifically, 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.
　本発明は、以上のような問題点を解消するためになされたものであり、光による劣化を加速させる試験において、試料の温度を設定した試験条件の温度にすることを目的とする。 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.
　本発明に係る試験装置は、恒温槽と、恒温槽の内部の空気を加熱するヒータと、恒温槽の内部に配置され、筒状の形状とされて筒内面に試験対象となる試料が載置される試料載置部を複数備え、筒中心に回転する回転試料台と、回転試料台の筒内面に配置されたブラックパネル温度計と、回転試料台の回転中心に配置されてブラックパネル温度計および試料載置部に載置される試料に耐候性試験用の光を照射する光源と、恒温槽内の温度を測定する槽内温度計と、回転試料台の筒内面と光源との間に配置され、回転試料台の試料載置部に載置された試料の表面温度を個別に測定する放射温度計と、ブラックパネル温度計の測定結果、槽内温度計の測定結果、および放射温度計の測定結果をもとに、放射温度計の測定結果が設定された試料温度となるように、試料載置部に載置された試料の表面温度を制御するコントローラとを備える。 A test apparatus according to the present invention 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. and a light source for irradiating the sample placed on the sample placement part with light for the weather resistance test, an in-bath thermometer for measuring the temperature in the constant temperature bath, and between the cylinder inner surface of the rotating sample stage and the light source A radiation 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).
　また、本発明に係る試験方法は、耐候性試験を実施する恒温槽の内部に配置され、筒状の形状とされて筒内面に試料載置部を複数備え、筒中心に回転する回転試料台の試料載置部に試料を載置する第１工程と、試料に耐候性試験用の光を照射する第２工程と、回転試料台の筒内面に配置されたブラックパネル温度計による測定結果、恒温槽内の温度の測定結果、および回転試料台の筒内面と光源との間に配置され、回転試料台の試料載置部に載置された放射温度計による試料の表面温の測定結果もとに、放射温度計の測定結果が設定された試料温度となるように、試料載置部に載置された試料の表面温度を制御する第３工程とを備える。 Further, in the test method according to the present invention, 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.
　以上説明したように、本発明によれば、回転試料台の試料載置部に載置された試料の表面温度を個別に測定する放射温度計を備えるので、光による劣化を加速させる試験において、試料の温度を設定した試験条件の温度にすることができる。 As described above, according to the present invention, since 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.
図１Ａは、本発明の実施の形態１に係る試験装置の構成を示す構成図である。FIG. 1A is a configuration diagram showing the configuration of a test apparatus according to Embodiment 1 of the present invention. 図１Ｂは、本発明の実施の形態１に係る試験装置の一部構成を示す構成図である。FIG. 1B is a configuration diagram showing a partial configuration of the test apparatus according to Embodiment 1 of the present invention. 図２は、放射温度計１０８による温度測定結果の１例を示す特性図である。FIG. 2 is a characteristic diagram showing an example of temperature measurement results by the radiation thermometer 108. In FIG. 図３は、本発明の実施の形態２に係る試験装置の構成を示す構成図である。FIG. 3 is a configuration diagram showing the configuration of a test apparatus according to Embodiment 2 of the present invention.
　以下、本発明の実施の形態に係る試験装置について説明する。 A test apparatus according to an embodiment of the present invention will be described below.
［実施の形態１］
　はじめに、本発明の実施の形態１に係る試験装置について、図１Ａ、図１Ｂを参照して説明する。この試験装置は、促進耐候性試験を実施するための装置であり、恒温槽１０１、ヒータ１０２、回転試料台１０３、ブラックパネル温度計１０５、光源１０６、槽内温度計１０７、放射温度計１０８、コントローラ１０９を備える。 [Embodiment 1]
First, a test apparatus according to Embodiment 1 of the present invention will be described with reference to FIGS. 1A and 1B. 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.
　ヒータ１０２は、恒温槽１０１の内部の空気を加熱する。回転試料台１０３は、恒温槽１０１の内部に配置され、筒状の形状とされている。回転試料台１０３は、例えば、図１Ｂの上面図に示すように、断面視で１２角形とされた筒であり、外形が１２角柱とされている。また、回転試料台１０３は、筒内面に試験対象となる試料１３１が載置される試料載置部１０４を複数備える。例えば、試料載置部１０４の枠に、試料１３１を嵌め込むことで固定することができる。例えば、回転試料台１０３の１２角柱の辺毎に、試料載置部１０４が設けられている。また、回転試料台１０３は、図示しない回転機構により、筒中心に回転する。 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. For example, as shown in the top view of FIG. 1B, the rotating sample table 103 is a cylinder having a dodecagonal shape in cross section, and has a dodecagonal prism shape. Further, 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. For example, the sample 131 can be fixed by fitting it in the frame of the sample mounting portion 104 . For example, a sample mounting portion 104 is provided for each side of the dodecagonal prism of the rotating sample stage 103 . Also, the rotating sample table 103 is rotated around the cylinder by a rotating mechanism (not shown).
　ブラックパネル温度計１０５は、回転試料台１０３の筒内面に配置されている。ブラックパネル温度計１０５は、いずれかの試料載置部１０４に配置されている。ブラックパネル温度計１０５は、黒く塗装されたステンレス板と、この表面に設けられた温度センサとから構成されている。また、ブラックパネル温度計１０５は、黒く塗装されたステンレス板の裏面に張り付けられたプラスチック（PVDF）の断熱材を備え、ステンレス板と断熱材との間に温度センサを配置することもできる。 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. In addition, 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.
　光源１０６は、回転試料台１０３の回転中心に配置されて、ブラックパネル温度計１０５および試料載置部１０４に載置される試料１３１に耐候性試験用の光を照射する。なお、光源１０６は、照射照度が放射計１１１により測定され、この測定結果を用いた光源制御部１１２により動作（出力）が制御される。 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.
　光源１０６は、例えば、サンシャインカーボンアークランプ、紫外線カーボンアークランプ、キセノンアークランプ、メタルハライドランプ、水銀ランプ、紫外線蛍光ランプなどから構成することができる（非特許文献１、２）。例えば、光源１０６として、太陽光に似た分光分布を有するキセノンアークランプが近年広く用いられている。光源１０６の光照射強度は、任意の値に設定可能であり、一般的には、３００ｎｍ－４００ｎｍの光が４０Ｗ／ｍ2～１８０Ｗ／ｍ2となるよう設定されることが多い。また、光源１０６は、図示していないが、冷却水を循環させるランプ冷却機構を備え、冷却可能とされている。 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). For example, as the light source 106, 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. Also, the light source 106 is provided with a lamp cooling mechanism that circulates cooling water, although not shown, so that it can be cooled.
　槽内温度計１０７は、恒温槽１０１内の温度を測定する。放射温度計１０８は、回転試料台１０３の試料載置部１０４に載置された複数の試料１３１の表面温度を非接触に測定する。放射温度計１０８は、回転試料台１０３の筒内面と光源１０６との間に配置されている。また、放射温度計１０８は、複数の試料１３１の表面温度を個別に測定する。放射温度計１０８は、赤外線検出素子から構成することができる。また、放射温度計１０８は、赤外線検出素子を２次元に配列させ、測定領域の２次元的温度分布を測定する熱画像センサから構成することもできる。 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 . Also, 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. Moreover, 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.
　コントローラ１０９は、ブラックパネル温度計１０５の測定結果、槽内温度計１０７の測定結果、および放射温度計１０８の測定結果をもとに、放射温度計１０８の測定結果が、設定された試料温度となるように、試料載置部１０４に載置された試料の表面温度を制御する。例えば、コントローラ１０９は、ヒータ１０２を制御することで、試料の表面温度を制御する。また、この試験装置は、回転試料台１０３の筒内部に気流を発生させる送風機１１０を備えることができる。 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 .
　送風機１１０は、従来の一般的な耐候性試験装置で用いられている、槽内温度・ブラックパネル温度制御のための恒温槽の底部に設けられている送風機（不図示、非特許文献１参照）に加え、本発明において新たに設けた（追加した）ものである。この場合、コントローラ１０９は、上述したヒータ１０２の制御に加え、送風機１１０による送風量などを制御することで、放射温度計１０８の測定結果が設定された試料温度となるように、試料の表面温度を制御する。 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.
　また、この試験装置は、加湿器１１３、湿度計１１４を備える。コントローラ１０９は、湿度計１１４の測定結果を元に、加湿器１１３を制御して、恒温槽１０１内の温度を設定した湿度とする。また、コントローラ１０９は、回転試料台１０３の回転速度が、設定されている値となるように、回転試料台１０３の回転機構の動作を制御する。また、コントローラ１０９は、各測定結果を、図示しない記憶装置に記憶し、また、恒温槽１０１の外に配置される図示しない表示装置に表示することができる。 In addition, 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 .
　この試験装置を用いることで、以下に示す方法により、促進耐候性試験が実施できる。まず、耐候性試験を実施する恒温槽１０１の内部に配置され、筒状の形状とされて筒内面に試料載置部１０４を複数備え、筒中心に回転する回転試料台１０３の複数の試料載置部１０４の各々に試料１３１を載置する（第１工程）。次に、試料に耐候性試験用の光を照射する（第２工程）。 　By using this test equipment, an accelerated weather resistance test can be carried out by the method shown below. First, 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). Next, the sample is irradiated with light for a weather resistance test (second step).
　次に、回転試料台１０３の筒内面に配置されたブラックパネル温度計１０５による測定結果、恒温槽１０１内の温度の測定結果、および回転試料台１０３の筒内面と光源１０６との間に配置され、回転試料台１０３の試料載置部１０４に載置された放射温度計１０８による試料の表面温の測定結果もとに、放射温度計１０８の測定結果が、設定された試料温度となるように、試料載置部１０４に載置された試料の表面温度を制御する（第３工程）。 Next, 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. , based on the measurement result of the surface temperature of the sample by the radiation thermometer 108 mounted on the sample mounting portion 104 of the rotating sample stage 103, 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).
　例えば、ヒータ１０２を制御することで、試料の表面温度を制御する。また、上述したヒータ１０２の制御に加え、送風機１１０による送風量などを制御することで、放射温度計１０８の測定結果が設定された試料温度となるように、試料の表面温度を制御する。また、湿度計１１４の測定結果を元に、加湿器１１３を制御して、恒温槽１０１内の温度を設定した湿度とする。上述したように設定した温度状態、湿度状態、および光照射を、設定された時間継続する。 For example, by controlling the heater 102, the surface temperature of the sample is controlled. In addition to the control of the heater 102 described above, 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. Also, based on the measurement result of the hygrometer 114, 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.
　ここで、光源１０６の設置位置と放射温度計１０８の設置位置を通過する仮想の直線上の回転試料台１０３の筒内面側の箇所を中心として、回転試料台１０３の回転方向の試料載置部１０４の幅の範囲が、放射温度計１０８の温度測定範囲とすることができる。コントローラ１０９は、試料載置部１０４が温度測定範囲に位置したときに放射温度計１０８が実施した測定結果を用いる。回転試料台１０３の回転は、コントローラ１０９により制御されており、予め放射温度計１０８の温度測定範囲をコントローラ１０９に設定しておけば、上述した測定制御が実施できる。例えば、コントローラ１０９は、試料載置部１０４が温度測定範囲に位置したときに、放射温度計１０８が測定を実施するように制御する。また、コントローラ１０９は、試料載置部１０４が温度測定範囲に位置したときに、放射温度計１０８が測定した結果を、ヒータ制御に用いる。 Here, 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. For example, 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.
　このようにすることで、試料１３１以外の温度測定結果が、コントローラ１０９によるヒータ１０２の制御に用いられることが防止できる。特に、試料載置部１０４が温度測定範囲の中心に位置したときに放射温度計１０８が実施した測定結果を用いることで、試料１３１の中心付近の表面の温度計測を、ヒータ１０２の制御に用いることができる。 By doing so, it is possible to prevent the temperature measurement results of other than the sample 131 from being used by the controller 109 to control the heater 102 . In particular, by using the measurement result obtained by the radiation thermometer 108 when the sample mounting portion 104 is positioned at the center of the temperature measurement range, the temperature measurement of the surface of the sample 131 near the center is used for controlling the heater 102. be able to.
　また、コントローラ１０９は、放射温度計１０８に計測されている温度が略一定となる時間が長い方の計測値を、放射温度計１０８の測定結果として用いることができる。回転試料台１０３と共に、各試料１３１は回転しているので、放射温度計１０８による温度測定結果には、図２に示すように、試料１３１の表面温度が計測されている状態と、試料１３１以外の領域の温度が計測されている状態とが、交互に現れる。一般に、より多くの試料を配置することを目的とし、回転方向に隣り合う試料の間は、可能な範囲で狭くしている。従って、試料１３１以外の領域の温度が計測されているｔ１－ｔ２間、ｔ３－ｔ４間に比較して、試料１３１の表面温度が計測されているｔ２－ｔ３間の方が長い時間となる。従って、放射温度計１０８に計測されている温度が略一定となる時間が長い方の計測値は、試料１３１の表面温度が計測されているものとすることができる。 In addition, 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. Therefore, 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.
　実施の形態１に係る試験装置によれば、光による劣化を加速させる試験において、光照射強度を変更する条件としても、試料の温度が測定できるので、試料の温度を設定した試験条件の温度にすることが可能となる。 According to the test apparatus according to the first embodiment, 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
［実施の形態２］
　次に、本発明の実施の形態２に係る試験装置について、図３を参照して説明する。この試験装置は、恒温槽１０１、ヒータ１０２、回転試料台１０３、試料載置部１０４、ブラックパネル温度計１０５、光源１０６、槽内温度計１０７、放射温度計１０８、コントローラ１０９、放射計１１１、光源制御部１１２、加湿器１１３、および湿度計１１４を備える。これらの構成は、前述した実施の形態１と同様である。 [Embodiment 2]
Next, a test apparatus according to Embodiment 2 of the present invention will be described with reference to FIG. 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.
　実施の形態２では、さらに、試料載置部１０４が設けられている回転試料台１０３の筒内面を撮影するカメラ１１５と、カメラ１１５が撮像した画像より試料載置部１０４を識別する画像処理回路１１６とを備える。カメラ１１５は、例えば、エリアイメージセンサから構成された、いわゆるデジタルカメラとすることができる。 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.
　コントローラ１０９は、画像処理回路１１６が試料載置部１０４を認識した時点で放射温度計１０８が実施した測定結果を用いる。例えば、画像処理回路１１６には、試料１３１が固定されている試料載置部１０４を、予め撮像することで得られている基準画像が設定されている。画像処理回路１１６は、撮像している画像の中に、基準画像とのパターン認識における一致の度合いが設定値以上の部分が検出されると、試料１３１が載置された試料載置部１０４を識別（特定）することができる。このようにすることで、試料１３１以外の温度測定結果が、コントローラ１０９による試料載置部１０４に載置された試料の表面温度の制御に用いられることが防止できる。 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 . For example, 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. When 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 .
　実施の形態２に係る試験装置によれば、光による劣化を加速させる試験において、光照射強度を変更する条件としても、試料の温度が測定できるので、試料の温度を設定した試験条件の温度にすることが可能となる。 According to the test apparatus according to the second embodiment, in the test for accelerating deterioration by light, the temperature of the sample can be measured even when the light irradiation intensity is changed. It becomes possible to
　なお、上述した実施の形態１，２に係る試験装置は、試料載置部１０４に載置されている試料を冷却する温度制御器をさらに備えることができる。光照射強度、槽内温度、試料表面温度の設定値の組み合わせによっては、ヒータ１０２および送風機１１０では、試料温度制御が難しい場合もある。このため、試料温度をさらに厳密に制御するために、試料の裏面から試料を冷却または加温する温度制御器を備えることができる。 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.
　以下、実験結果について説明する。まず、平面形状が、７ｃｍ×１５ｃｍの鋼からなる板材にウレタン樹脂塗料を厚さ５０μｍで塗布した試料を作製した。 The experimental results are explained below. First, a sample was prepared by applying a urethane resin paint to a thickness of 50 μm on a steel plate material having a planar shape of 7 cm×15 cm.
　また、促進耐候性試験の設定条件として、光照射強度ＩＷ／ｍ2（波長３００ｎｍ－４００ｎｍ）、ブラックパネル温度ＢＰＴ℃、槽内温度ＣＴ℃とした。この条件を設定した耐候性試験装置を１時間運転して促進耐候性試験を実施し、試料表面温度ＳＴ℃を測定した。また、光照射強度Ｉ＝６０、１２０、１８０とした場合について、送風機１１０を稼働した状態でも運転し、試料表面温度ＳＴ℃を測定した。なお、この試験では、恒温槽の底部に、槽内温度・ブラックパネル温度制御のための従来同様の送風機も動作させている。表１において、発明による送風機１１０も稼働した状態を、追加送風機が「あり」としている。追加送風機が「なし」は、発明による送風機１１０を稼働せず、従来同様の送風機を稼働させている条件である。 Also, 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. In addition, when the light irradiation intensity I was set to 60, 120, and 180, the sample surface temperature ST°C was measured while the air blower 110 was in operation. In addition, in this test, 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. In 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.
　試験条件１、２、５は、光照射強度Ｉのみを変えた試験であるが、光照射強度Ｉが大きくなるにつて、試料表面温度が上がっていることが確認された。そこで、回転試料台の筒内部に気流を発生させる送風機１１０を稼働させると、試験条件３では試験条件１と同じ４０℃まで試料温度を低下させることができ、送風機１１０によって試料表面温度の制御が可能であることが確認できた。試験条件３よりもＩが大きい試験条件５では、送風機１１０の稼働によって試験条件４よりも試料表面温度は低下したが、試験条件１と同じ温度まで下げることはできなかった。 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.
　これにより、１８０Ｗ／ｍ2という強い光照射強度とした場合、槽内温度を３０℃とすると、送風のみでは試料温度を４０℃まで下げることが容易でないことが分かった。そこで、試験条件６として、試料裏面にペルチェ素子からなる温度制御器を装着し、試料を裏面から冷却しながら試験を実施すると、試料表面温度を４０℃に制御することができ、送風機１１０に加えて試料裏面から冷却することが試料表面温度の制御に有効であると分かった。なお、ここでは、温度制御器として、ペルチェ素子を用いたが、ヒートシンクや冷水／温水を循環させることによる温度制御器を用いることもできることは容易に類推できる。 As a result, it was found that it is not easy to lower the sample temperature to 40° C. only by blowing air when the temperature in the chamber is 30° C. when the light irradiation intensity is as high as 180 W/m 2 . Therefore, as 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. Here, 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.
　また、ここでは試料表面温度が上がりすぎた場合にそれを下げる例を示したが、試料表面温度が低い場合に、送風機１１０の出力を抑制し、また、試料裏面を加温することで、試料表面温度を上げることができるのも容易に類推できる。 Also, here, an example of lowering the surface temperature of the sample when it rises too much is shown. It can be easily guessed that the surface temperature can be increased.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　以上の実験結果から明らかなように、試料の表面温度を測定しているので、光による劣化を加速させる試験において、試料の表面温度の制御が可能となる。 As is clear from the above experimental results, since the surface temperature of the sample is measured, it is possible to control the surface temperature of the sample in tests that accelerate deterioration due to light.
　以上に説明したように、本発明によれば、回転試料台の試料載置部に載置された試料の表面温度を個別に測定する放射温度計を備えるので、光による劣化を加速させる試験において、試料の温度を設定した試験条件の温度にすることができる。 As described above, according to the present invention, since 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.
　なお、本発明は以上に説明した実施の形態に限定されるものではなく、本発明の技術的思想内で、当分野において通常の知識を有する者により、多くの変形および組み合わせが実施可能であることは明白である。 It should be noted that the present invention is not limited to the embodiments described above, and many modifications and combinations can be implemented by those skilled in the art within the technical concept of the present invention. It is clear.
　１０１…恒温槽、１０２…ヒータ、１０３…回転試料台、１０４…試料載置部、１０５…ブラックパネル温度計、１０６…光源、１０７…槽内温度計、１０８…放射温度計、１０９…コントローラ、１１０…送風機、１１１…放射計、１１２…光源制御部、１１３…加湿器、１１４…湿度計、１３１…試料。 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.

Claims (7)

  1. 　恒温槽と、
    　前記恒温槽の内部の空気を加熱するヒータと、
    　前記恒温槽の内部に配置され、筒状の形状とされて筒内面に試験対象となる試料が載置される試料載置部を複数備え、筒中心に回転する回転試料台と、
    　前記回転試料台の筒内面に配置されたブラックパネル温度計と、
    　前記回転試料台の回転中心に配置されて前記ブラックパネル温度計および前記試料載置部に載置される試料に耐候性試験用の光を照射する光源と、
    　前記恒温槽内の温度を測定する槽内温度計と、
    　前記回転試料台の筒内面と前記光源との間に配置され、前記回転試料台の前記試料載置部に載置された試料の表面温度を個別に測定する放射温度計と、
    　前記ブラックパネル温度計の測定結果、槽内温度計の測定結果、および前記放射温度計の測定結果をもとに、前記放射温度計の測定結果が設定された試料温度となるように、前記試料載置部に載置された試料の表面温度を制御するコントローラと
    　を備えることを特徴とする試験装置。     a constant temperature bath,
    a heater that heats the air inside the constant temperature bath;
    a rotating sample table that is arranged inside the constant temperature bath, has a plurality of cylindrical sample placement units on which samples to be tested are placed on the inner surface of the tube, and rotates about the tube;
    a black panel thermometer arranged on the inner surface of the cylinder of the rotating sample stage;
    a light source arranged at the center of rotation of the rotating sample stage and irradiating light for a weather resistance test on the black panel thermometer and the sample placed on the sample placement unit;
    a bath thermometer for measuring the temperature in the constant temperature bath;
    a radiation thermometer disposed between the inner surface of the cylinder of the rotating sample table and the light source for individually measuring the surface temperature of the sample placed on the sample mounting portion of the rotating sample table;
    Based on the measurement result of the black panel thermometer, the measurement result of the in-bath thermometer, and the measurement result of the radiation thermometer, the sample is adjusted so that the measurement result of the radiation thermometer becomes the set sample temperature. and a controller for controlling the surface temperature of the sample placed on the placing part.
  2. 　請求項１記載の試験装置において、
    　前記光源の設置位置と前記放射温度計の設置位置を通過する仮想の直線上の前記回転試料台の筒内面側の箇所を中心として、前記回転試料台の回転方向の前記試料載置部の幅の範囲が、前記放射温度計の温度測定範囲とされ、
    　前記コントローラは、前記試料載置部が前記温度測定範囲に位置したときに前記放射温度計が実施した測定結果を用いる
    　ことを特徴とする試験装置。     In the test device according to claim 1,
    Width of the sample mounting portion in the direction of rotation of the rotating sample stage centered on a point on the cylinder inner surface side of the rotating sample stage on an imaginary straight line passing through the installation position of the light source and the installation position of the radiation thermometer is the temperature measurement range of the radiation thermometer,
    The test apparatus, wherein the controller uses a measurement result obtained by the radiation thermometer when the sample placement section is positioned within the temperature measurement range.
  3. 　請求項１記載の試験装置において、
    　前記コントローラは、前記放射温度計に計測されている温度が略一定となる時間が長い方の計測値を、前記放射温度計の測定結果として用いる
    　ことを特徴とする試験装置。     In the test device according to claim 1,
    The test apparatus, wherein the controller uses, as the measurement result of the radiation thermometer, the measured value for which the temperature measured by the radiation thermometer has a longer time for which the temperature is substantially constant.
  4. 　請求項１記載の試験装置において、
    　前記試料載置部が設けられている前記回転試料台の筒内面を撮影するカメラと、
    　前記カメラが撮像した画像より前記試料載置部を識別する画像処理回路と、
    　前記コントローラは、前記画像処理回路が前記試料載置部を認識した時点で前記放射温度計が実施した測定結果を用いる
    　ことを特徴とする試験装置。     In the test device according to claim 1,
    a camera for photographing the inner surface of the cylinder of the rotating sample table on which the sample mounting part is provided;
    an image processing circuit that identifies the sample placement portion from the image captured by the camera;
    The test apparatus, wherein the controller uses a measurement result obtained by the radiation thermometer when the image processing circuit recognizes the sample placement unit.
  5. 　請求項１～４のいずれか１項に記載の試験装置において、
    　前記試料載置部に載置されている試料を冷却する温度制御器をさらに備えることを特徴とする試験装置。     In the test device according to any one of claims 1 to 4,
    A test apparatus, further comprising a temperature controller for cooling the sample placed on the sample placement part.
  6. 　請求項１～５のいずれか１項に記載の試験装置において、
    　前記回転試料台の筒内部に気流を発生させる送風機をさらに備えることを特徴とする試験装置。     In the test device according to any one of claims 1 to 5,
    A test apparatus, further comprising a blower for generating an air flow inside the cylinder of the rotating sample stage.
  7. 　耐候性試験を実施する恒温槽の内部に配置され、筒状の形状とされて筒内面に試料載置部を複数備え、筒中心に回転する回転試料台の前記試料載置部に試料を載置する第１工程と、
    　前記試料に耐候性試験用の光を照射する第２工程と、
    　前記回転試料台の筒内面に配置されたブラックパネル温度計による測定結果、前記恒温槽内の温度の測定結果、および前記回転試料台の筒内面と光源との間に配置され、前記回転試料台の前記試料載置部に載置された放射温度計による前記試料の表面温の測定結果もとに、前記放射温度計の測定結果が設定された試料温度となるように、前記試料載置部に載置された前記試料の表面温度を制御する第３工程と
    　を備える試験方法。     It is placed inside a constant temperature chamber in which a weather resistance test is performed, has a cylindrical shape, and has a plurality of sample mounting portions on the inner surface of the cylinder. A first step of placing
    a second step of irradiating the sample with light for a weather resistance test;
    Measurement results by a black panel thermometer arranged on the inner surface of the cylinder of the rotating sample stage, measurement results of the temperature inside the thermostat, and the rotating sample stage placed between the inner surface of the cylinder of the rotating sample stage and the light source. Based on the measurement result of the surface temperature of the sample by the radiation thermometer placed on the sample placement part, the sample placement part is adjusted so that the measurement result of the radiation thermometer becomes the set sample temperature and a third step of controlling the surface temperature of said sample placed on said test method.
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