JP2007132813A - Anemometer for weather/light resistance testing machine, and weather/light resistance testing machine using it - Google Patents

Anemometer for weather/light resistance testing machine, and weather/light resistance testing machine using it Download PDF

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JP2007132813A
JP2007132813A JP2005326339A JP2005326339A JP2007132813A JP 2007132813 A JP2007132813 A JP 2007132813A JP 2005326339 A JP2005326339 A JP 2005326339A JP 2005326339 A JP2005326339 A JP 2005326339A JP 2007132813 A JP2007132813 A JP 2007132813A
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wind speed
anemometer
heat
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sensitive body
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JP3793844B1 (en
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Choichi Suga
長市 須賀
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Suga Test Instruments Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive anemometer for a weather/light resistance testing machine capable of measuring wind speed accurately even when a sample is rotated around a light source without disturbing wind passing along the sample surface. <P>SOLUTION: In this inexpensive anemometer for the weather/light resistance testing machine having almost the same form as a conventional black panel thermometer, wherein an influence of the wind speed exerted on a measured value of a thermosensitive body is measured beforehand, and the correlation between the temperature and the wind speed is clarified from the value, and the measured value of the thermosensitive body during a test is converted into the wind speed from a temperature-wind speed curve determined beforehand, and the atmosphere on the sample surface is not disturbed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、キセノンアークランプ、サンシャインカーボンアークランプ、メタルハライドアークランプ、紫外線カーボンアークランプを光源とし、試験槽内の風速を制御できる耐候光試験機において、当該試験槽内の風速を測定する風速計に関し、さらに詳しくは、試料近傍の流れる空気との熱交換が良好な工夫を凝らした当該試験槽の試料枠に装着した感熱体の値から換算して求める当該耐候光試験機用の風速計に関する。
The present invention relates to an anemometer that measures the wind speed in a test vessel using a xenon arc lamp, a sunshine carbon arc lamp, a metal halide arc lamp, and an ultraviolet carbon arc lamp as a light source. More specifically, the present invention relates to an anemometer for the weathering light tester obtained by converting from a value of a heat sensitive body attached to a sample frame of the test tank in which heat exchange with flowing air in the vicinity of the sample is well devised. .

近年はより耐候光性に優れた製品が求められており、このために多大の開発費が費やされおり、開発費の回収を効率よく行うために、いかに短期間に、そして精度良く耐候光性能を求めることができるかが開発の重点課題になっている。 In recent years, products with better weathering resistance have been demanded, and therefore, a great deal of development costs have been expended, and in order to efficiently recover development costs, how quickly and accurately weathering light can be collected. Whether performance can be sought is a priority issue for development.

従来の耐候光試験機すなわちキセノンアークランプ、サンシャインカーボンアークランプ、メタルハライドアークランプ、紫外線カーボンアークランプを光源とした耐候光試験機の試験条件は、主に、照射強度、温度、湿度、照射時間、暗黒時間、水の噴霧量、噴霧時間などであり、JIS、ISO,ASTM,AATCCの規格には、試験条件について言及しているものもある。 The test conditions of the conventional weathering light testing machine, i.e., xenon arc lamp, sunshine carbon arc lamp, metal halide arc lamp, ultraviolet carbon arc lamp as the light source are mainly irradiation intensity, temperature, humidity, irradiation time, The dark time, the spray amount of water, the spray time, and the like. Some standards of JIS, ISO, ASTM, and AATCC refer to test conditions.

照射強度、湿度、降雨条件一定としても、温度によって、試験結果すなわち、劣化の度合いが異なる。そのため多くの耐候光試験機は光源の照射条件(例えば照射波長域、照射強度)、試験温湿度、降雨などの条件を変更設定できる機構になっている。 Even if the irradiation intensity, humidity, and rainfall conditions are constant, the test result, that is, the degree of deterioration, varies depending on the temperature. For this reason, many weathering light testing machines have a mechanism that can change and set conditions such as irradiation conditions (for example, irradiation wavelength range, irradiation intensity), test temperature and humidity, and rainfall of the light source.

通常、温度の制御は、試験槽内の乾球温度計、試料と同一位置に取り付けたブラックパネル温度計、ブラックスタンダード温度計などによって検知した値を基に行っている。 Normally, the temperature is controlled based on values detected by a dry bulb thermometer in the test tank, a black panel thermometer mounted at the same position as the sample, a black standard thermometer, or the like.

当該各温度計で検知した値を基に試験槽内の温度を制御するパラメータは、試験槽内を流れる空気温度と風速である。一般に、風速を一定にした時のブラックパネル温度と乾球温度との差は20数℃である。 Parameters for controlling the temperature in the test chamber based on the values detected by the thermometers are the temperature of air flowing through the test chamber and the wind speed. In general, the difference between the black panel temperature and the dry bulb temperature when the wind speed is constant is 20 ° C. or more.

光源の照射強度、試験槽内の湿度を一定の値に保持し、ブラックパネル温度の温度を一定に保つ試験条件の場合では、試験槽内を流れる空気温度又は風速をあるいは空気温度と風速の両方を制御する。 In the case of test conditions that maintain the illumination intensity of the light source and the humidity in the test chamber at a constant value and maintain the temperature of the black panel temperature constant, the air temperature or the wind speed flowing in the test chamber or both the air temperature and the wind speed To control.

光源の照射強度、試験槽内の湿度を一定の値に保持し、ブラックパネル温度計の温度と乾球温度の双方を一定の値に保つ試験条件の場合では、試験槽内を流れる風速のみが温度制御因子となる。例えば、米国自動車技術協会の規格、SAE1885においては、ブラックパネル温度89±3℃、乾球温度62±2℃と規定されている。 In the case of test conditions that maintain the light source irradiation intensity and humidity in the test chamber at a constant value, and maintain both the temperature of the black panel thermometer and the dry bulb temperature, only the wind speed flowing in the test chamber It becomes a temperature control factor. For example, in the standard of the American automobile engineering association, SAE1885, the black panel temperature is 89 ± 3 ° C. and the dry bulb temperature is 62 ± 2 ° C.

上述の如く、耐候光試験機においては、風速が重要な劣化要因となる。 As described above, the wind speed is an important deterioration factor in the weathering tester.

風速を測定する機器にはその原理・構造から、回転型風速計、風圧型風速計、熱線型風速計、超音波型風速計などがある(例えば、非特許文献1参照。)。 There are a rotational anemometer, a wind pressure anemometer, a hot-wire anemometer, an ultrasonic anemometer, and the like in terms of the principle and structure of the equipment for measuring the wind speed (for example, see Non-Patent Document 1).

回転型と超音波型の風速計はそれらの形状から試料枠に取り付けた場合、風速計の近傍に乱流を生じ、試料の温度を不均一にする危険性がある。 When the rotary type and ultrasonic type anemometers are attached to the sample frame due to their shapes, there is a risk that turbulent flow is generated in the vicinity of the anemometer and the temperature of the sample becomes non-uniform.

耐候光試験機の多くは、試料枠に取り付けた複数の試料への照射量を均一にするために、試料枠が光源を中心に回転している。このような耐候光試験機においては、温度調整のための空気は試料枠の回転軸の方向と同一の方向に送風されている。このために、風圧型と熱線型の風速計は取り付け方向を規定しないと、試料表面を流れる風速を正確に把握できないことになる。 In many weatherproof light testing machines, the sample frame rotates around the light source in order to make the irradiation amount to a plurality of samples attached to the sample frame uniform. In such a weatherproof light testing machine, the air for temperature adjustment is blown in the same direction as the direction of the rotation axis of the sample frame. For this reason, the wind pressure type and the hot wire type anemometers cannot accurately grasp the wind speed flowing on the sample surface unless the mounting direction is specified.

当該4種類の風速計はそれぞれに前記のような特徴があり、耐候光試験機の風速計に最適なものとは言い難い。 Each of the four types of anemometers has the characteristics as described above, and is not optimal for an anemometer of a weathering light tester.

前述のように乾球温度が規定されている場合には、ブラックパネル温度計の温度は試験槽内を流れる風速で制御されることになる。照射強度が高い試験条件の場合には、風速を速くしなければならない耐候光試験機があり、実暴露環境より風速が速くなった場合には、耐候光試験機の試験は実環境での劣化とは異なった結果をもたらす恐れもある。 As described above, when the dry bulb temperature is defined, the temperature of the black panel thermometer is controlled by the speed of the air flowing in the test chamber. In the case of test conditions with high irradiation intensity, there are weathering light testing machines that must increase the wind speed, and when the wind speed is faster than the actual exposure environment, the weathering light testing machine is subject to deterioration in the actual environment. There is a risk of different results.

さらに、同一条件の試験を型式の異なる試験機で行った際に、試験機間の風速の差が著しい場合には、試験結果が異なる場合も予想される。このような場合には、規定された試験条件に加え、試料表面の風速も測定し、記録しておくことが肝要である。 Furthermore, when the test under the same conditions is performed with different types of test machines, if the difference in wind speed between the test machines is significant, the test results may be different. In such a case, it is important to measure and record the wind speed on the sample surface in addition to the prescribed test conditions.

機械学会編 流体計測法 昭和61年3月刊(76頁〜142頁)The Japan Society of Mechanical Engineers Fluid Measurement Method March 1986 (pp. 76-142)

前記のように、従来の耐候光試験機には風速を変化させる機構を有するものはあるが、試料表面の風速をリアルタイムに検知する風速計を搭載したものは見当たらず、また、既存の風速計は、前記の如く、回転型風速計や超音波型風速計の場合には、測定部が回転あるいは数本の棒状の形状をしており試料近傍に乱流を生じさせる。また、試料が光源の周囲を回転している耐候光試験機の場合には、熱線風速計や風圧型風速計は、試料表面の複雑な流れとなっている風速を正確に測定できないので、耐候光試験機に適した風速計とは言い難い。 As described above, some conventional weathering light testing machines have a mechanism for changing the wind speed, but there is no one equipped with an anemometer that detects the wind speed on the surface of the sample in real time. As described above, in the case of a rotary anemometer or an ultrasonic anemometer, the measuring part is rotated or has a bar shape, and turbulence is generated in the vicinity of the sample. Also, in the case of a weathering light testing machine in which the sample rotates around the light source, the hot wire anemometer and the wind pressure anemometer cannot accurately measure the wind speed that is a complex flow on the sample surface. It is hard to say that an anemometer suitable for optical testing machines.

従って本発明の目的は、試料表面を通過する風を乱すことなく、試料が光源の周囲を回転した場合においても、風速を精度良く測定することが可能な、耐候光試験機用の風速計を提供することにある。 Accordingly, an object of the present invention is to provide an anemometer for a weathering tester capable of accurately measuring the wind speed even when the sample rotates around the light source without disturbing the wind passing through the sample surface. It is to provide.

本発明は、上述の目的を達成するために鋭意検討を重ねた結果、熱吸収の良好な物体表面に一定の強度の光を照射し、物体表面を一定の温度で流れる気体の流速を変化させたときに、物体表面温度が流速の変化に相対して変化することに着目し、この相関から風速を求めることが可能であることを見出し、想到したものである。 As a result of intensive investigations to achieve the above-mentioned object, the present invention irradiates an object surface with good heat absorption with a certain intensity of light, and changes the flow velocity of the gas flowing on the object surface at a constant temperature. At that time, it was noticed that the object surface temperature changed relative to the change in the flow velocity, and found that it was possible to obtain the wind speed from this correlation.

本発明は、かかる知見に基づいて完成されたものであり、光による劣化を調べる耐候光試験において、試験槽内の雰囲気を制御するための流動空気と、光源から放射される光に暴露された試料表面の風速を、試料と同等の位置に設けた感熱体の温度を風速に換算して表示する風速計である。 The present invention has been completed based on such knowledge, and was exposed to flowing air for controlling the atmosphere in the test chamber and light emitted from the light source in a weathering light test for examining deterioration by light. This is an anemometer that displays the wind speed on the surface of the sample by converting the temperature of the heat sensitive body provided at the same position as the sample into the wind speed.

また、ブラックパネル温度計の値を、温度―風速曲線から換算して求めた風速値を表示することを特徴とする風速計である。 Further, the anemometer is characterized in that the wind speed value obtained by converting the value of the black panel thermometer from the temperature-wind speed curve is displayed.

また、前記風速計の値を電気信号に変換しデジタル表示することを特徴とする風速計である。 Further, the anemometer is characterized in that the value of the anemometer is converted into an electric signal and digitally displayed.

また、感熱体を内挿するための感熱部保護管の外部にステンレス鋼線を巻きつけ、当該感熱部保護管をブラックパネル温度計の感熱部保護管取り付け部に装着し、耐熱性黒色エナメルを焼付け塗装し、当該感熱部保護管内に感熱体を挿入し、感熱体の測定値を、温度―風速曲線から換算して風速を求める風速計である。 Also, wrap a stainless steel wire around the outside of the heat-sensitive part protection tube for inserting the heat-sensitive body, attach the heat-sensitive part protective tube to the heat-sensitive part protective tube attachment part of the black panel thermometer, and attach the heat-resistant black enamel. This is an anemometer that is baked and coated, and a heat sensitive body is inserted into the heat sensitive part protective tube, and a measured value of the heat sensitive body is converted from a temperature-wind speed curve to obtain a wind speed.

また、前記記載の風速計で求めた値を基に、試験槽内の風速を制御することを特徴とする耐候光試験機である。
Moreover, it is a weatherproof light testing machine characterized by controlling the wind speed in a test tank based on the value calculated | required with the anemometer of the said description.

本発明によれば、耐候光試験中の試料表面の風速を求めるために、前述の回転型風速計、風圧型風速計、熱線型風速計、超音波型風速計などを装着する必要がなく、従来のブラックパネル温度計とほぼ同一形式で、感熱体の測定値に及ぼす風速の影響をあらかじめ求めておき、試験中の感熱体の測定値を、あらかじめ求めた温度―風速曲線から風速に換算すればよく、安価で、試料表面の雰囲気をかく乱することのない耐候光試験機用の風速計を提供できる。 According to the present invention, in order to determine the wind speed of the sample surface during the weathering test, it is not necessary to wear the rotary anemometer, the wind pressure anemometer, the hot wire anemometer, the ultrasonic anemometer, etc. In almost the same format as a conventional black panel thermometer, the influence of the wind speed on the measured value of the thermal element is obtained in advance, and the measured value of the thermal element under test is converted into the wind speed from the previously determined temperature-wind speed curve. An anemometer for a weathering light tester that is inexpensive, inexpensive and does not disturb the atmosphere of the sample surface can be provided.

また、当該風速計を搭載した耐候光試験機で風速を制御しながら試験を行うことにより、再現性の良い試験結果を提供できる。
Moreover, a test result with good reproducibility can be provided by performing a test while controlling the wind speed with a weathering light tester equipped with the anemometer.

本発明の風速計1は、図1に示されるようにブラックパネル温度計とほぼ類似の形状をしており、厚さ1mmのオーステナイト系ステンレス鋼SUS304製の金属板2上に一端を封止した感熱体保護管3が密着して取り付けられている。感熱体保護管3の直径は3.5mmである。感熱体保護管3は断熱材5と断熱材6によって金属板2に固定されている。感熱体保護管3の中には感熱体4としてバイメタルを挿入してある。風速指示部7は円盤状で、図には示していないが円の周辺部には風速を表す目盛が刻まれており、バイメタルに連動した指示針が風速に呼応して回転し、当該目盛を指示するようになっている。風速指示部7は当該指示針に外力が作用し、指示値を誤らせないために透明なアクリル製保護板で覆ってある。 As shown in FIG. 1, the anemometer 1 of the present invention has substantially the same shape as a black panel thermometer, and one end is sealed on a metal plate 2 made of austenitic stainless steel SUS304 having a thickness of 1 mm. A heat sensitive body protection tube 3 is attached in close contact. The diameter of the heat sensitive body protection tube 3 is 3.5 mm. The heat sensitive body protection tube 3 is fixed to the metal plate 2 by a heat insulating material 5 and a heat insulating material 6. A bimetal is inserted as the heat sensitive body 4 in the heat sensitive body protective tube 3. The wind speed indicator 7 is disk-shaped, and although not shown in the figure, a scale indicating the wind speed is engraved on the periphery of the circle, and the indicator hand linked to the bimetal rotates in response to the wind speed, and the scale is displayed. It comes to direct. The wind speed indicator 7 is covered with a transparent acrylic protective plate so that an external force acts on the indicator needle and the indicated value is not mistaken.

図1に示した風速指示部は、感熱体の熱による変形を、指示針の変位として利用しているが、感熱体には、白金抵抗体、サーミスタ、熱電対などを用いて、それらの信号を温度に変換してもよい。 The wind speed indicator shown in FIG. 1 uses the deformation of the heat sensitive body due to the heat as the displacement of the indicator needle. The heat sensitive body uses a platinum resistor, thermistor, thermocouple, etc. May be converted to temperature.

また、感熱体の信号を電気信号に置き換えて、液晶などを利用してデジタル表示することもできる。 Further, the signal of the heat sensitive body can be replaced with an electric signal, and digital display can be performed using liquid crystal or the like.

また、風速指示部の位置を、図1のものから90度回転した位置に取り付け、目盛部分を感熱体とは反対の位置とし、回転する試料枠の外側に目盛部が位置するようにすることによって、より風速の値を目読しやすくこともできる。 In addition, the position of the wind speed indicator is attached to the position rotated 90 degrees from that of FIG. 1, the scale portion is opposite to the heat sensitive body, and the scale portion is positioned outside the rotating sample frame. This makes it easier to read the wind speed value.

感熱体保護管3の表面には図2に示すように空気の保有する熱エネルギーをすばやく感熱体に伝達するための微細な突起、すなわち、直径0.3mmのSUS304製の風受線8がらせん状に巻きつけてある。らせんのピッチは、0.5mmで、らせんの傾斜は感熱体保護管3の長手方向に対して45度である。さらに、風受線8、感熱体保護管3、断熱材5、断熱材6及び金属板2の表面にはブラックパネル温度計に塗装してある焼付型耐候性黒色エナメルと同等のものが塗装してある。 As shown in FIG. 2, the surface of the heat-sensitive body protection tube 3 is spirally provided with fine protrusions for rapidly transferring the thermal energy possessed by air to the heat-sensitive body, that is, the wind receiving wire 8 made of SUS304 having a diameter of 0.3 mm. It is wrapped in a shape. The pitch of the helix is 0.5 mm, and the inclination of the helix is 45 degrees with respect to the longitudinal direction of the heat sensitive body protection tube 3. Further, the surface of the wind receiving wire 8, the heat sensitive body protective tube 3, the heat insulating material 5, the heat insulating material 6 and the metal plate 2 is coated with an equivalent of a seizure type weatherproof black enamel coated on a black panel thermometer. It is.

次に本発明の風速計1をキセノンアークランプ式耐候試験機の試料枠に搭載し、温度と風速の関係を調べた結果を図3に示す。試料表面での照射強度は150W/m、試料枠の回転は毎分1回、試料枠直径は580mm、試験槽内を流れる空気の温度は38℃とした。図3にはブラックパネル温度計及び、らせんのピッチを粗くした風速計で試験した結果も併せて示した。 Next, the anemometer 1 of the present invention is mounted on the sample frame of a xenon arc lamp type weathering tester, and the relationship between the temperature and the wind speed is examined. FIG. The irradiation intensity on the sample surface was 150 W / m 2 , the sample frame was rotated once per minute, the sample frame diameter was 580 mm, and the temperature of the air flowing in the test tank was 38 ° C. FIG. 3 also shows the results of testing with a black panel thermometer and an anemometer with a rough helical pitch.

図3から明らかなように、試料表面を流れる空気の温度と、試料表面の照射強度を一定にしても、風速が異なると、試料表面の温度が異なり、本試験条件の場合には風速が速くなると温度が低下する。 As can be seen from FIG. 3, even if the temperature of the air flowing on the sample surface and the irradiation intensity of the sample surface are constant, the temperature of the sample surface is different if the wind speed is different. Then the temperature drops.

また、感熱体保護管の表面形状によっても温度が異なり、らせんのピッチが0.5mmの場合がもっとも風速の変化に対する温度の変化が激しい。この結果から、本発明の風速計は、5m/s以下の風速を、温度の値を温度―風速曲線から変換して求めることができる。
Also, the temperature varies depending on the surface shape of the heat-sensitive body protection tube, and the change in temperature with respect to the change in wind speed is most severe when the pitch of the helix is 0.5 mm. From this result, the anemometer of the present invention can determine the wind speed of 5 m / s or less by converting the temperature value from the temperature-wind speed curve.

上述の発明は、耐候光試験機間の試験結果の差異を低減するために、光劣化を試験する耐候光試験機の試料表面の風速の検知に利用できる。
The above-described invention can be used for detecting the wind speed on the surface of a sample of a weathering light tester for testing light deterioration in order to reduce a difference in test results between the weathering light testing machines.

本発明にかかる風速計の構成を示す外観図である。It is an external view which shows the structure of the anemometer concerning this invention. 感熱体保護管表面形状を示す外観図である。It is an external view which shows the heat sensitive body protection tube surface shape. 本発明にかかわる風速計の風速と温度の関係を示す図である。It is a figure which shows the relationship between the wind speed and temperature of the anemometer concerning this invention.

符号の説明Explanation of symbols

1 風速計
2 金属板
3 感熱体保護管
4 感熱体
5 断熱材
6 断熱材
7 風速指示部
8 らせん状風受線
DESCRIPTION OF SYMBOLS 1 Anemometer 2 Metal plate 3 Thermal element protection tube 4 Thermal element 5 Thermal insulation material 6 Thermal insulation material 7 Wind speed instruction | indication part 8 Spiral wind receiving wire

Claims (5)

キセノンアークランプ、サンシャインカーボンアークランプ、メタルハライドアークランプ、紫外線カーボンアークランプ、紫外線蛍光灯のどれか一つを光源とした耐候光試験機において、当該光源の照射強度と、当該耐候光試験槽内の乾球温度を一定としたときの試料近傍に装着した感熱体の温度と、槽内を流れる風速から導かれる温度―風速曲線から、試験中の感熱体の温度を風速に換算して求めることが可能な風速計。 In a weathering light tester that uses any one of xenon arc lamp, sunshine carbon arc lamp, metal halide arc lamp, ultraviolet carbon arc lamp, and ultraviolet fluorescent lamp as a light source, the irradiation intensity of the light source and the From the temperature of the heat sensitive body mounted near the sample when the dry bulb temperature is constant and the temperature-wind speed curve derived from the wind speed flowing in the tank, the temperature of the heat sensitive body under test can be calculated by converting it to the wind speed. Possible anemometer. 当該感熱体をブラックパネル温度計とした、請求項1記載の風速計。 The anemometer according to claim 1, wherein the heat sensitive body is a black panel thermometer. 当該風速計で計測した値を、デジタル表示することを特徴とする請求項1から請求項2のいずれかに記載の風速計。 The anemometer according to any one of claims 1 to 2, wherein a value measured by the anemometer is digitally displayed. 感熱体を内挿するための感熱部保護管の外部にステンレス鋼線を巻きつけ、当該感熱部保護管をブラックパネル温度計の感熱部保護管取り付け部に装着し、耐熱性黒色エナメルを焼付け塗装したことを特徴とする請求項1から請求項3のいずれかに記載の風速計。 A stainless steel wire is wound around the outside of the heat-sensitive part protection tube for interpolating the heat-sensitive body, the heat-sensitive part protective tube is attached to the heat-sensitive part protective tube attachment part of the black panel thermometer, and heat-resistant black enamel is baked and painted The anemometer according to any one of claims 1 to 3, wherein the anemometer is characterized. 請求項1から請求項4に記載の風速計で計測した値を基に、試験槽内の風速を制御することを特徴とする耐候光試験機。
A weathering light tester characterized by controlling the wind speed in the test tank based on the value measured by the anemometer according to claim 1.
JP2005326339A 2005-11-10 2005-11-10 Anemometer for weathering light testing machine and weathering light testing machine using the anemometer Active JP3793844B1 (en)

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JP2005326339A JP3793844B1 (en) 2005-11-10 2005-11-10 Anemometer for weathering light testing machine and weathering light testing machine using the anemometer

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008185502A (en) * 2007-01-31 2008-08-14 Sekisui House Ltd Combined degradation test method for painting steel plate
WO2013147471A1 (en) * 2012-03-27 2013-10-03 주식회사 포인트 Wind vane

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105866016B (en) * 2016-06-02 2018-11-27 浙江多元纺织科技有限公司 A kind of improved tent cloth fade resistance test device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008185502A (en) * 2007-01-31 2008-08-14 Sekisui House Ltd Combined degradation test method for painting steel plate
WO2013147471A1 (en) * 2012-03-27 2013-10-03 주식회사 포인트 Wind vane
KR101331940B1 (en) 2012-03-27 2013-11-21 주식회사 포인트 Anemoscope

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