| Project/Area Number |
17K06470
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Measurement engineering
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| Research Institution | Aichi Institute of Technology |
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Principal Investigator |
Tsuda Norio 愛知工業大学, 工学部, 教授 (20278229)
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| Co-Investigator(Kenkyū-buntansha) |
五島 敬史郎 愛知工業大学, 工学部, 教授 (00550146)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | VCSEL / 自己結合信号 / 距離・速度同時測定 / 自己結合信号の広がり / 測定精度向上 / 距離速度同時測定 / FPGA / FFT / レーザ計測 |
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| Outline of Final Research Achievements |
In the research on distance and velocity measurements using the self-coupling signal effect, a semiconductor laser has been modulated by using triangular wave voltage waveform. Measurements based on the self-coupling effect of LDs are based on the interference between the oscillating light and the return light reflected from the surface of the object. However, conventional measurements using the self-coupling effect have not only generated return noise, but also spread the self-coupling signal, resulting in low signal strength and low measurement accuracy. As a result of direct observation of the current flowing into the LD and linearly modulating the oscillation wavelength of the LD using arbitrary waveform, the spread of the self-coupled signal is reduced, the signal strength is increased and the measurement accuracy is improved.
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| Academic Significance and Societal Importance of the Research Achievements |
今回の研究を通じて得られた学術的意義や社会的意義は、半導体レーザー（LD）の自己結合効果を利用したセンサの測定精度の向上に繋がるLDの変調技術を明らかにしたことである。その変調技術とは、今まで行われてきた多くの研究では、三角波電圧波形を用いてLDを変調していた。しかし今回LDに流れ込む電流に注目し、LDの発振波長を線形的に変化するように変調した所、自己結合信号の広がりを押さえ、信号強度が上がり、測定精度の向上に繋がった。
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