レーザーダイオード光源のLDVシステムへの適用の検討(レーザーダイオードと光学系の特性評価)

概要

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Abstract It is important for internal combustion engine to study in-cylinder gas flow, as they realize to high efficiency and low exhaust pollution engine. Therefore, it is necessary to grasp gas flow in an engine in detail. About the laser doppler velocimeter (LDV), it is important to miniaturize for the improvement in flexibility of measurement. He-Ne laser has so far been used as a laser light source, however, the laser oscillation part is very large. In order to extend the measurement point within an engine, the improvement in flexibility of equipment is required. Then, we decided to use a laser diode (LD) as a light source for improvement of LDV system. Therefore, the characteristic of laser diode was evaluated. There is no precedent of LDV which used laser diode in measurement of gas flow in an engine until now. For this reason, it aimed at the validity in the measurement in an engine as LD-LDV being shown. As a result, it was shown that a laser diode is effective for the LDV light source. Moreover, it was able to be shown that LD-LDV is effective in the measurement in an engine.
宮崎大学の論文