JP5738210B2 - Solar simulator - Google Patents
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- JP5738210B2 JP5738210B2 JP2012026292A JP2012026292A JP5738210B2 JP 5738210 B2 JP5738210 B2 JP 5738210B2 JP 2012026292 A JP2012026292 A JP 2012026292A JP 2012026292 A JP2012026292 A JP 2012026292A JP 5738210 B2 JP5738210 B2 JP 5738210B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
本発明は、疑似太陽光を照射するソーラシミュレータに関する。 The present invention relates to a solar simulator that emits simulated sunlight.
従来より、太陽電池セルの性能測定において、疑似太陽光を照射する照明装置としてのソーラシミュレータが用いられている。ソーラシミュレータが備える光学システムにおいて、光源から出射された光は、楕円反射鏡によって反射されて、楕円反射鏡の開口部に向けて放射される。放射された光は、一次平面反射鏡、照度を均一化するインテグレータレンズ、二次平面反射鏡、および拡散光を平行光化するコリメーターレンズを介して、照射面に照射される。 2. Description of the Related Art Conventionally, a solar simulator as an illumination device that emits simulated sunlight has been used in performance measurement of solar cells. In the optical system provided in the solar simulator, the light emitted from the light source is reflected by the elliptical reflecting mirror and emitted toward the opening of the elliptical reflecting mirror. The emitted light is irradiated onto the irradiation surface through a primary plane reflecting mirror, an integrator lens that equalizes illuminance, a secondary plane reflecting mirror, and a collimator lens that collimates diffused light.
コリメーターレンズは球面収差を持ち、そのために、同心円状に照度分布のムラが生じる。また、光源の照射変動や光学系部品（楕円反射鏡、一次平面反射鏡、二次平面反射鏡）の劣化やがたつきにより、照度分布が変動し、高均一な照度分布を保つことが難しい。 The collimator lens has spherical aberration, and as a result, uneven illumination distribution occurs concentrically. Also, it is difficult to maintain a highly uniform illuminance distribution due to fluctuations in the illuminance due to fluctuations in the illumination of the light source and deterioration and shakiness of the optical system components (elliptical reflector, primary flat reflector, secondary flat reflector). .
例えば特許文献１では、光路上にハーフミラーを設けて、光源から出射された光を分光し、分光された光の照度分布をモニタリングしている。そして、複数個の開閉制御可能な微小ミラーを、上述した光学系部品とは異なる平面基板上に２次元的に配列して構成されたＤＭＤ（Ｄｉｇｉｔａｌ Ｍｉｒｒｏｒ Ｄｅｖｉｃｅ）を用いて、照射面の微少部分の照度を制御することで、照度分布を調整して高均一な照度分布を保つことが図られている。 For example, in Patent Document 1, a half mirror is provided on the optical path, the light emitted from the light source is dispersed, and the illuminance distribution of the dispersed light is monitored. Then, using a DMD (Digital Mirror Device) configured by two-dimensionally arranging a plurality of micro mirrors that can be controlled to be opened and closed on a flat substrate different from the optical system components described above, a minute portion of the irradiation surface By controlling the illuminance, the illuminance distribution is adjusted to maintain a highly uniform illuminance distribution.
しかしながら、ハーフミラーにおいても、光学系部品の劣化やがたつきにより、照度のモニタリングミスが発生する可能性がある。また、一つの照射面に対し２枚以上の太陽電池セルを配置し、太陽電池セルの電気特性を測定する場合がある。この場合、照度分布が変動することで、各太陽電池セルに照射される照度が変動し、各太陽電池セルにおいて規定時間内での照度変動率が規格外となり、定められた照度から外れた範囲で電気特性の測定が行われてしまうおそれがある。 However, even in the half mirror, there is a possibility that an illuminance monitoring error may occur due to deterioration or rattling of the optical system parts. In some cases, two or more solar cells are arranged on one irradiation surface and the electrical characteristics of the solar cells are measured. In this case, the illuminance applied to each photovoltaic cell fluctuates due to fluctuations in the illuminance distribution, and the illuminance fluctuation rate within the specified time in each solar cell is outside the standard, and the range deviated from the specified illuminance. There is a risk that electrical characteristics may be measured.
本発明は、上記に鑑みてなされたものであって、より簡単な構造で照度分布の変動を抑制し、より均一な照度分布を得られるソーラシミュレータを得ることを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to obtain a solar simulator that can suppress variation in illuminance distribution with a simpler structure and obtain a more uniform illuminance distribution.
上述した課題を解決し、目的を達成するために、本発明は、計測位置に配置された太陽電池セルに疑似太陽光としての光を照射するソーラシミュレータであって、太陽電池セルに照射される光を出射する光源と、複数の照度計を有して、太陽電池セルよりも光源側であって光源からの光路に定期的に挿入される監視部と、照度計の計測結果に基づいて照度と計測位置での照度分布を算出する算出部と、光源からの光の照射位置を移動させる照射位置変更手段と、前記照度分布が所定の条件を満足しない場合に、照射位置変更手段を制御し、照度に応じた移動量で照射位置を移動させる制御部と、を備えることを特徴とする。 In order to solve the above-described problems and achieve the object, the present invention is a solar simulator that irradiates solar cells arranged at a measurement position with light as pseudo-sunlight, and the solar cells are irradiated with the solar simulator. A light source that emits light, a illuminance meter based on the measurement result of the illuminometer, and a monitoring unit that has a plurality of illuminance meters and is regularly inserted in the light path from the light source side of the solar cell And an illumination position changing means for moving the irradiation position of light from the light source, and an irradiation position changing means when the illumination distribution does not satisfy a predetermined condition. And a control unit that moves the irradiation position by an amount of movement corresponding to the illuminance.
本発明によれば、複数の照度計を用いて、より簡単な構造で照度分布の変動を抑制し、より均一な照度分布を得ることができる。また、制御部によって自動的に光の照射位置を移動させるので、手動で行う場合と比べ、より正確に、より素早く照度分布を合わせることが可能となる。 According to the present invention, using a plurality of illuminance meters, it is possible to suppress variation in illuminance distribution with a simpler structure and obtain a more uniform illuminance distribution. In addition, since the light irradiation position is automatically moved by the control unit, the illuminance distribution can be adjusted more accurately and more quickly than in the case where the light irradiation position is manually performed.
以下に、本発明の実施の形態にかかるソーラシミュレータを図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Below, the solar simulator concerning embodiment of this invention is demonstrated in detail based on drawing. Note that the present invention is not limited to the embodiments.
実施の形態１．
図１は、本発明の実施の形態１にかかるソーラシミュレータの概略構成を示す図である。ソーラシミュレータ５０は、光源２、楕円反射鏡１、一次平面反射鏡３、インテグレータレンズ４、二次平面反射鏡５、コリメーターレンズ６、照度分布監視部（監視部）８、光源位置駆動部９、算出部１７、制御部１８を備える。
Embodiment 1 FIG.
FIG. 1 is a diagram illustrating a schematic configuration of a solar simulator according to the first embodiment of the present invention. The solar simulator 50 includes a light source 2, an elliptical reflecting mirror 1, a primary planar reflecting mirror 3, an integrator lens 4, a secondary planar reflecting mirror 5, a collimator lens 6, an illuminance distribution monitoring unit (monitoring unit) 8, and a light source position driving unit 9. A calculation unit 17 and a control unit 18.
ソーラシミュレータ５０では、光源２から出射された疑似太陽光としての光が、照射対象である太陽電池セル１０に照射される。光源２から出射された光は、楕円反射鏡１によって反射されて、楕円反射鏡１の開口部に向けて放射される。放射された光は、一次平面反射鏡３、照度の均一化を図るインテグレータレンズ４、二次平面反射鏡５、および拡散光の平行光化を図るコリメーターレンズ６を介して、太陽電池セル１０に照射される。なお、以下の説明において、図１に示すように、楕円反射鏡１からの光の放射方向に平行な軸をＺ軸と設定し、Ｚ軸に垂直であって互いに平行なＸ軸とＹ軸を設定する。 In the solar simulator 50, the light as the pseudo-sunlight emitted from the light source 2 is irradiated to the solar battery cell 10 that is the irradiation target. The light emitted from the light source 2 is reflected by the elliptical reflecting mirror 1 and emitted toward the opening of the elliptical reflecting mirror 1. The emitted light passes through the primary planar reflecting mirror 3, the integrator lens 4 for uniforming the illuminance, the secondary planar reflecting mirror 5, and the collimator lens 6 for collimating the diffused light. Is irradiated. In the following description, as shown in FIG. 1, an axis parallel to the radiation direction of light from the elliptical reflecting mirror 1 is set as the Z axis, and the X axis and the Y axis are perpendicular to the Z axis and parallel to each other. Set.
照度分布監視部８は、太陽電池セル１０に照射される擬似太陽光の照度分布を監視する。光源位置駆動部９は、監視結果から算出された照度分布に応じて、光源２の位置・姿勢を変化させる。 The illuminance distribution monitoring unit 8 monitors the illuminance distribution of the artificial sunlight irradiated to the solar battery cell 10. The light source position driving unit 9 changes the position / posture of the light source 2 according to the illuminance distribution calculated from the monitoring result.
図２は、電気特性の測定が行われる測定位置に太陽電池セル１０を搬送する搬送システムの概略構成を示す平面図である。図２に示すように、太陽電池セル１０は、擬似太陽光が照射される測定位置１２まで搬送ベルト１１によって搬送される。測定位置１２に搬送された太陽電池セル１０には太陽電池セル測定ユニット１３が接触され、電気特性が測定される。この電気特性の測定によって、太陽電池セル１０の選別が行われる。 FIG. 2 is a plan view illustrating a schematic configuration of a transport system that transports the solar battery cell 10 to a measurement position where electrical characteristics are measured. As shown in FIG. 2, the photovoltaic cell 10 is conveyed by the conveyance belt 11 to the measurement position 12 where the simulated sunlight is irradiated. A solar battery cell measurement unit 13 is brought into contact with the solar battery cell 10 conveyed to the measurement position 12, and the electrical characteristics are measured. The solar cells 10 are sorted by measuring the electrical characteristics.
ここで、太陽電池セル測定ユニット１３は、太陽電池セル１０のエミッタ電極にエミッタ電極用プローブを接続させ、ベース電極にベース電極用プローブを接触させるためのプローブホルダとプローブで構成されるものとする。なお、エミッタ電極等の図示は省略する。 Here, the solar cell measurement unit 13 is configured by a probe holder and a probe for connecting an emitter electrode probe to the emitter electrode of the solar cell 10 and bringing the base electrode probe into contact with the base electrode. . The illustration of the emitter electrode and the like is omitted.
図３は、ソーラシミュレータ５０が備える照度分布監視部８部分の拡大図である。図４は、図３に示すＡ−Ａ線に沿った矢視図である。この場合、照射光が太陽電池セル測定ユニット１３に遮られることで、太陽電池セル１０の照射面に影が生じてしまう。そこで、ソーラシミュレータ５０では、太陽電池セル測定ユニット１３の上部に設置された照度分布監視部８を、定期的に照射光の光路に挿入させて照度分布の監視を行う。なお、任意のタイミングで挿入してもよい。 FIG. 3 is an enlarged view of the illuminance distribution monitoring unit 8 provided in the solar simulator 50. FIG. 4 is an arrow view along the line AA shown in FIG. In this case, the irradiation light is blocked by the solar cell measurement unit 13, so that a shadow is generated on the irradiation surface of the solar cell 10. Therefore, the solar simulator 50 monitors the illuminance distribution by periodically inserting the illuminance distribution monitoring unit 8 installed in the upper part of the solar cell measurement unit 13 into the optical path of the irradiation light. It may be inserted at an arbitrary timing.
図４に示すように、照度分布監視部８のうち疑似太陽光が照射される面には、複数の照度計１４が設けられている。ここで、複数の照度計１４による照度分布の監視方法について、２つの例を用いて以下に説明する。 As shown in FIG. 4, a plurality of illuminometers 14 are provided on the surface of the illuminance distribution monitoring unit 8 on which the pseudo sunlight is irradiated. Here, an illuminance distribution monitoring method using a plurality of illuminometers 14 will be described below using two examples.
１つ目の例として、１枚の太陽電池セル１０に対して疑似太陽光を照射して電気特性を測定する場合について説明する。図５は、複数の照度計１４のナンバリングについて説明するための図である。例えば、図５に示すように、１７点の監視場所に照度計１４を設け、それぞれの照度計１４にＮｏ．１〜１７とナンバリングし、各照度計１４で照度を計測する。 As a first example, a case where electric characteristics are measured by irradiating one solar battery cell 10 with pseudo-sunlight will be described. FIG. 5 is a diagram for explaining the numbering of the plurality of illuminance meters 14. For example, as shown in FIG. 5, illuminance meters 14 are provided at 17 monitoring locations. Numbered 1 to 17, and the illuminance is measured with each illuminometer 14.
算出部１７は、各照度計１４での計測値から照度を算出するとともに、計測値の最大値（Ｅｍａｘ）と最小値（Ｅｍｉｎ）とから±（（Ｅｍａｘ−Ｅｍｉｎ）／（Ｅｍａｘ＋Ｅｍｉｎ））×１００の算出式を用い、照度分布（％）を算出する。そして、制御部１８は、算出された照度分布（％）がＪＩＳ等の規格で定められた照度分布（％）の規格（所定の条件の一例）内に収まるように、光源位置駆動部９を駆動させて光源２の位置や姿勢を変化させる。光源位置駆動部９には、例えばサーボモータ等が用いられ、Ｘ軸方向、Ｙ軸方向、Ｚ軸方向に沿った位置の調整を実施する。 The calculation unit 17 calculates the illuminance from the measurement values obtained by the illuminance meters 14 and ± ((Emax−Emin) / (Emax + Emin)) × 100 from the maximum value (Emax) and the minimum value (Emin) of the measurement values. The illuminance distribution (%) is calculated using the following formula. Then, the control unit 18 controls the light source position driving unit 9 so that the calculated illuminance distribution (%) falls within the illuminance distribution (%) standard (an example of a predetermined condition) defined by a standard such as JIS. The position and attitude of the light source 2 are changed by driving. For example, a servo motor or the like is used for the light source position driving unit 9 and adjusts the position along the X-axis direction, the Y-axis direction, and the Z-axis direction.
図６は、照度分布の算出結果を例示する図である。なお、図６では、濃淡で照度の高さを表しており、色の濃いところで照度が高く、色の薄いところで照度が低くなっている。また、濃度が１段階異なると、照度が０．６％異なるものとする。例えば、図６に示すような照度分布が得られた場合、照度分布（％）は±２．４％となり、ＪＩＳで定められた等級Ａ（所定の条件の一例）の規格±２．０％以下の規格外となってしまう。 FIG. 6 is a diagram illustrating the calculation result of the illuminance distribution. In FIG. 6, the illuminance height is expressed by shading, where the illuminance is high at dark colors and the illuminance is low at light colors. Further, when the density is different by one level, the illuminance is different by 0.6%. For example, when the illuminance distribution as shown in FIG. 6 is obtained, the illuminance distribution (%) is ± 2.4%, and the standard ± 2.0% of the grade A (an example of a predetermined condition) defined by JIS. It becomes out of the following standards.
図７は、照度計１４のグループ分けについて説明するための図である。照度計１４のうちＮｏ．１〜３にナンバリングされたグループ１と、Ｎｏ．１５〜１７にナンバリングされたグループ２との間で照度差が生じている。具体的には、グループ１に含まれる照度計１４で計測される照度よりも、グループ２に含まれる照度計１４で計測される照度のほうが高くなっている。 FIG. 7 is a diagram for explaining grouping of the illuminance meter 14. Of the illuminance meter 14, no. Group 1 numbered 1 to 3, There is an illuminance difference with the group 2 numbered 15-17. Specifically, the illuminance measured by the illuminometer 14 included in the group 2 is higher than the illuminance measured by the illuminometer 14 included in the group 1.
そこで、グループ１とグループ２との照度差に基づいて、疑似太陽光の照射位置が−Ｘ軸方向にずれるように光源２を移動させる。光源２の移動方向は、光源２からの光の放射方向と、測定位置１２での光の照射方向とによって決定される。例えば、本実施の形態のように、光源２からの光の放射方向と、測定位置１２での光の照射方向とが１８０度異なるような場合に疑似太陽光の照射位置を−Ｘ軸方向にずらすためには、光源２を＋Ｘ軸方向に移動させる必要がある。なお、Ｙ軸方向に対しては、照射位置の移動方向と光源の移動方向が一致する。 Therefore, based on the illuminance difference between the group 1 and the group 2, the light source 2 is moved so that the irradiation position of the pseudo sunlight is shifted in the −X axis direction. The moving direction of the light source 2 is determined by the light emission direction from the light source 2 and the light irradiation direction at the measurement position 12. For example, as in this embodiment, when the light emission direction from the light source 2 and the light irradiation direction at the measurement position 12 are 180 degrees different from each other, the irradiation position of the pseudo-sunlight is set to the −X axis direction. In order to shift, it is necessary to move the light source 2 in the + X-axis direction. For the Y-axis direction, the movement direction of the irradiation position coincides with the movement direction of the light source.
同様に、照度計１４のうちＮｏ．１，７，１５にナンバリングされたグループ３と、Ｎｏ．３，１１，１７にナンバリングされたグループ４との間で照度差が生じている。具体的には、グループ４に含まれる照度計１４で計測される照度よりも、グループ３に含まれる照度計１４で計測される照度のほうが高くなっている。そして、グループ３とグループ４との照度差に基づいて、疑似太陽光の照射位置が−Ｙ軸方向にずれるように光源２を移動させる。 Similarly, no. Group 3, numbered 1, 7, 15; There is an illuminance difference with the group 4 numbered 3, 11, and 17. Specifically, the illuminance measured by the illuminometer 14 included in the group 3 is higher than the illuminance measured by the illuminometer 14 included in the group 4. Then, based on the illuminance difference between the group 3 and the group 4, the light source 2 is moved so that the irradiation position of the pseudo sunlight is shifted in the −Y axis direction.
図８は、光源２を移動させた後の照度分布の算出結果を例示する図である。Ｘ軸方向、Ｙ軸方向への光源２の移動により、図８に示すような照度分布となるように調整が行われる。図８に示す照度分布（％）は±１．８％となり、ＪＩＳの規格を満足する。照度差に対する移動量は、予めティーチングしておけばよい。例えば、照度差と移動量とを対応させたテーブル情報を図示しない記憶部に記憶させておき、適宜テーブル情報を参照するようにすればよい。また、規格を満足する照度分布が一度の調整で得られない場合には、照度の計測、照度分布の算出、照度差に基づく光源２の移動を、所望の照度分布になるまで繰り返せばよい。 FIG. 8 is a diagram illustrating a calculation result of the illuminance distribution after the light source 2 is moved. Adjustment is performed so as to obtain an illuminance distribution as shown in FIG. 8 by movement of the light source 2 in the X-axis direction and the Y-axis direction. The illuminance distribution (%) shown in FIG. 8 is ± 1.8%, which satisfies the JIS standard. The amount of movement with respect to the illuminance difference may be taught in advance. For example, table information that associates the difference in illuminance with the amount of movement may be stored in a storage unit (not shown), and the table information may be referred to as appropriate. If an illuminance distribution that satisfies the standard cannot be obtained by a single adjustment, the illuminance measurement, the illuminance distribution calculation, and the movement of the light source 2 based on the illuminance difference may be repeated until the desired illuminance distribution is obtained.
２つ目の例として、疑似太陽光の測定位置１２に２枚の太陽電池セル１０を配置して電気特性を測定する場合について説明する。図９は、疑似太陽光の測定位置１２に配置された２枚の太陽電池セル１０を示す図である。図１０は、照度計１４のグループ分けについて説明するための図である。 As a second example, a case will be described in which two solar cells 10 are arranged at the measurement position 12 of pseudo sunlight and the electrical characteristics are measured. FIG. 9 is a diagram showing two solar cells 10 arranged at the measurement position 12 of pseudo sunlight. FIG. 10 is a diagram for explaining grouping of the illuminance meter 14.
この場合、上記の照度分布（％）の他に、図１０に示すように、複数の照度計１４をＮｏ．１〜１１にナンバリングされたグループ５と、Ｎｏ．７〜１７にナンバリングされたグループ６との二つに分け、各グループでの照度が同等となるよう、光源位置駆動部９を駆動し、光源２の位置や姿勢を変化させる。 In this case, in addition to the above illuminance distribution (%), as shown in FIG. Group 5 numbered 1 to 11; The light source position drive unit 9 is driven to change the position and posture of the light source 2 so that the illuminance in each group becomes equal.
図１１は、照度分布の算出結果を例示する図である。図６と同様に濃淡で照度の高さを表している。図１１に示す例では、測定位置１２全体での照度分布（％）は±１．９％となり、ＪＩＳの規格を満足するが、グループ５とグループ６と間で照度差が大きくなっている。具体的には、グループ５に含まれる照度計１４で計測される照度のほうが、グループ６に含まれる照度計１４で計測される照度よりも高くなっている。 FIG. 11 is a diagram illustrating the calculation result of the illuminance distribution. Similar to FIG. 6, the illuminance height is expressed in shades. In the example shown in FIG. 11, the illuminance distribution (%) at the entire measurement position 12 is ± 1.9%, which satisfies the JIS standard, but the illuminance difference between group 5 and group 6 is large. Specifically, the illuminance measured by the illuminometer 14 included in the group 5 is higher than the illuminance measured by the illuminometer 14 included in the group 6.
その照度差から、予めティーチングしておいた照度差に対する移動量に応じ、疑似太陽光の照射位置が＋Ｘ軸方向にずれるように光源２を移動させる。この場合の光源２の移動も制御部１８の制御によって行われる。図１２は、光源２を移動させた後の照度分布の算出結果を例示する図である。図１２に示すような照度分布に調整すれば、グループ５とグループ６での照度の均一化を図りつつ、照度分布もＪＩＳの規格内とすることができる。 From the illuminance difference, the light source 2 is moved so that the irradiation position of the pseudo sunlight shifts in the + X-axis direction according to the movement amount with respect to the illuminance difference that has been taught in advance. The movement of the light source 2 in this case is also performed under the control of the control unit 18. FIG. 12 is a diagram illustrating a calculation result of the illuminance distribution after the light source 2 is moved. If the illuminance distribution as shown in FIG. 12 is adjusted, the illuminance distribution can be within the JIS standard while the illuminance is uniform in the group 5 and the group 6.
以上説明したように、本実施の形態にかかるソーラシミュレータ５０では、定期的に照度分布を監視し、監視結果に基づいて疑似太陽光の照射位置を変化させるので、より簡単な構造で照度分布の変動を抑制し、高均一な照度分布を得ることができる。 As described above, the solar simulator 50 according to the present embodiment periodically monitors the illuminance distribution, and changes the irradiation position of the pseudo sunlight based on the monitoring result. Variations can be suppressed and a highly uniform illuminance distribution can be obtained.
また、測定位置１２に配置される太陽電池セル１０が１枚の場合も、複数枚の場合も、より簡単な構造で照度分布の変動を抑制し、高均一な照度分布を得ることができる。また、制御部１８によって自動的に光の照射位置を移動させるので、手動で行う場合と比べ、より正確に、より素早く照度分布を合わせることが可能となる。 Moreover, even when the number of the photovoltaic cells 10 arranged at the measurement position 12 is one or more than one, the variation of the illuminance distribution can be suppressed with a simpler structure, and a highly uniform illuminance distribution can be obtained. Further, since the light irradiation position is automatically moved by the control unit 18, it is possible to match the illuminance distribution more accurately and more quickly than in the case where the light irradiation position is manually performed.
図１３は、実施の形態１の変形例としてのソーラシミュレータ５０の概略構成を示す図である。本変形例にかかるソーラシミュレータ５０は、照射位置変更手段として、一次平面反射鏡傾き駆動部１５、二次平面反射鏡傾き駆動部１６を有する。一次平面反射鏡傾き駆動部１５や二次平面反射鏡傾き駆動部１６には、例えばサーボモータが用いられ、一次平面反射鏡３や二次平面反射鏡５の姿勢や位置を変化させる。 FIG. 13 is a diagram showing a schematic configuration of a solar simulator 50 as a modification of the first embodiment. The solar simulator 50 according to this modification includes a primary plane reflecting mirror tilt driving unit 15 and a secondary plane reflecting mirror tilt driving unit 16 as irradiation position changing means. For example, a servo motor is used for the primary plane reflecting mirror tilt driving unit 15 and the secondary plane reflecting mirror tilt driving unit 16, and the posture and position of the primary plane reflecting mirror 3 and the secondary plane reflecting mirror 5 are changed.
なお、照度分布（％）に加えて、照度が時間変動していないかを、照度計１４の平均値から観測し、照度が規格以上に変動した場合には、光源２に流す電流値を変動させ、照度を規格内に納めるように調整を実施してもよい。一次平面反射鏡傾き駆動部１５、二次平面反射鏡傾き駆動部１６の駆動や、電流値の変動も制御部１８によって制御される。 In addition to the illuminance distribution (%), whether the illuminance has changed over time is observed from the average value of the illuminometer 14, and if the illuminance fluctuates beyond the standard, the value of the current passed through the light source 2 fluctuates. Adjustment may be performed so that the illuminance falls within the standard. The control of the driving of the primary plane reflecting mirror tilt driving unit 15 and the secondary plane reflecting mirror tilt driving unit 16 and the fluctuation of the current value are also controlled by the control unit 18.
なお、本実施の形態において、照度分布監視部８が有する照度計１４は１７点としたが、その限りではない。例えば、照度計１４の数を１７点よりも増やしてより詳細に照度分布を監視してもよいし、照度計１４の数を１７点よりも減らしてより簡易的に照度分布を監視してもよい。 In this embodiment, the illuminance meter 14 included in the illuminance distribution monitoring unit 8 has 17 points, but this is not a limitation. For example, the illuminance distribution may be monitored in more detail by increasing the number of illuminance meters from 17 points, or the illuminance distribution may be monitored more simply by reducing the number of illuminance meters from 17 points. Good.
以上のように、本発明にかかるソーラシミュレータは、高均一な疑似太陽光の照射に有用であり、特に、太陽電池セルの電気特性の測定に適している。 As described above, the solar simulator according to the present invention is useful for irradiation of highly uniform pseudo-sunlight, and is particularly suitable for measuring the electrical characteristics of solar cells.
１ 楕円反射鏡
２ 光源
３ 一次平面反射鏡
４ インテグレータレンズ
５ 二次平面反射鏡
６ コリメーターレンズ
８ 照度分布監視部（ 監視部）
９ 光源位置駆動部（照射位置変更手段）
１０ 太陽電池セル
１１ 搬送ベルト
１２ 測定位置
１３ 太陽電池セル測定ユニット
１４ 照度計
１５ 一次平面反射鏡傾き駆動部（照射位置変更手段）
１６ 二次平面反射鏡傾き駆動部（照射位置変更手段）
１７ 算出部
１８ 制御部
５０ ソーラシミュレータ
DESCRIPTION OF SYMBOLS 1 Elliptical reflector 2 Light source 3 Primary plane reflector 4 Integrator lens 5 Secondary plane reflector 6 Collimator lens 8 Illuminance distribution monitoring part (monitoring part)
9 Light source position drive (irradiation position changing means)
DESCRIPTION OF SYMBOLS 10 Solar cell 11 Conveyor belt 12 Measurement position 13 Solar cell measurement unit 14 Illuminance meter 15 Primary plane reflecting mirror inclination drive part (irradiation position changing means)
16 Secondary plane reflecting mirror tilt drive unit (irradiation position changing means)
17 Calculation unit 18 Control unit 50 Solar simulator
Claims (6)
前記太陽電池セルに照射される光を出射する光源と、
複数の照度計を有して、前記太陽電池セルよりも前記光源側であって前記光源からの光路に定期的に挿入される監視部と、
前記照度計の計測結果に基づいて照度と前記計測位置における照度分布を算出する算出部と、
前記光源からの光の照射位置を移動させる照射位置変更手段と、
前記照度分布が所定の条件を満足しない場合に、前記照射位置変更手段を制御し、前記照度に応じた移動量で前記照射位置を移動させる制御部と、を備えることを特徴とするソーラシミュレータ。 It is a solar simulator that irradiates light as pseudo-sunlight to solar cells arranged at a measurement position,
A light source that emits light applied to the solar cell;
A monitoring unit having a plurality of illuminance meters, which is on the light source side of the solar cells and periodically inserted in the optical path from the light source,
A calculation unit that calculates illuminance and illuminance distribution at the measurement position based on the measurement result of the illuminometer,
An irradiation position changing means for moving an irradiation position of light from the light source;
A solar simulator, comprising: a control unit that controls the irradiation position changing unit and moves the irradiation position by a movement amount corresponding to the illuminance when the illuminance distribution does not satisfy a predetermined condition.
前記照射位置変更手段は、前記反射鏡の傾きを変更させて前記照射位置を移動させることを特徴とする請求項１に記載のソーラシミュレータ。 A reflection mirror that reflects the light emitted from the light source and guides the light to the irradiation position;
The solar simulator according to claim 1, wherein the irradiation position changing unit moves the irradiation position by changing an inclination of the reflecting mirror.
前記制御部は、前記複数の照度計を前記太陽電池セルの枚数に合わせてグループ分けして、前記太陽電池セルに照射される光の照度同士が同等となるように前記照射位置を移動させることを特徴とする請求項１〜４のいずれか１つに記載のソーラシミュレータ。 A plurality of the solar cells are arranged at the measurement position,
The control unit groups the plurality of illuminance meters according to the number of the solar cells, and moves the irradiation position so that the illuminances of the light irradiated to the solar cells are equal to each other. The solar simulator according to claim 1, wherein:
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