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Volume 48, Issue 2
Special Issue on Advanced Laser Technology for Automotive Applications
Displaying 1-7 of 7 articles from this issue
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Special Issue on Advanced Laser Technology for Automotive Applications
Special Issue
Laser Review
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Takunori TAIRA2020 Volume 48 Issue 2 Pages 62-
Published: 2020
Released on J-STAGE: June 23, 2022
JOURNAL FREE ACCESSDownload PDF (192K) -
Kunihiko WASHIO2020 Volume 48 Issue 2 Pages 63-
Published: 2020
Released on J-STAGE: June 23, 2022
JOURNAL FREE ACCESSGlobal trends in automotive laser applications are briefly reviewed, with focus on market and technology trends in laser materials processing for automobile manufacturing and LiDARs toward autonomous driving.View full abstractDownload PDF (519K) -
Tsukasa HASHIOKA, Yusuke OISHI2020 Volume 48 Issue 2 Pages 68-
Published: 2020
Released on J-STAGE: June 23, 2022
JOURNAL FREE ACCESSToyota Motor Corporation has developed a new series of engines based on the Toyota New Global Architecture (TNGA) design philosophy with even better fuel economy and stronger dynamic performance. These engines incorporate innovative design elements that boost combustion speed, helping to achieve thermal efficiency in excess of 40% and specific power of 60 kW/L. Essential elements for high-speed combustion are the coefficient of flow at the intake port and the tumble ratio. Laser clad valve seats were adopted to enhance both of these elements. This paper describes the development of a laser cladding process that improves production efficiency and reduces the size of the cladding machine, with the aim of enabling the production of the TNGA engine series for different markets around the world.View full abstractDownload PDF (1921K) -
Toshihiko BABA2020 Volume 48 Issue 2 Pages 73-
Published: 2020
Released on J-STAGE: June 23, 2022
JOURNAL FREE ACCESSLight detection and ranging (LiDAR) that detects three-dimensional information of surrounding objects are attracting much attention in these years with topics on autonomous vehicles, robots and drones. However, conventional LiDAR devices are large and costly, mainly because of using a mechanical beam steering device, which hampers their wide range of applications. Therefore, various nonmechanical LiDAR devices, such as flash-type, phased-array-type and slow-light-type, are being developed extensively. This paper explains principles of different types of LiDAR devices, their performance and essential constrains, and requirements for each LiDAR component. The paper also focuses on a challenge toward the realization of stamp-size nonmechanical LiDAR.View full abstractDownload PDF (989K) -
Hitoshi YAMADA, Kenichi YANAI2020 Volume 48 Issue 2 Pages 78-
Published: 2020
Released on J-STAGE: June 23, 2022
JOURNAL FREE ACCESSThe race to develop automated driving technologies is challenging. In order to realize automated driving, sensors that detect obstacles in a vehicle’s path and a fusion of multiple sensor inputs surrounding a vehicle are necessary. As a result, Light Detection and Ranging (LIDAR) sensor technology is expected to be dominant in this space, along with millimeter-wave RADAR and cameras. Recent trends in LIDAR and Laser technologies for automated driving are reviewed here.View full abstractDownload PDF (572K) -
Kazuhisa YAMAMOTO2020 Volume 48 Issue 2 Pages 83-
Published: 2020
Released on J-STAGE: June 23, 2022
JOURNAL FREE ACCESSAlthough laser processing has been the main laser application for automobiles, the development of various laser applications has been accelerating. This paper describes the features, the problems, and the prospects of visible laser applications and focuses on laser lighting and display applications in this field.View full abstractDownload PDF (770K)
Laser Original
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Masato ISHINO, Toshiyuki KITAMURA, Tomoyuki OHASHI, Akira TAKAMORI ...2020 Volume 48 Issue 2 Pages 88-
Published: 2020
Released on J-STAGE: June 23, 2022
JOURNAL FREE ACCESSWe investigated LiDAR using visible light laser diodes (LDs) and an optical power supply using visible laser diode (LD) are investigated. With LiDAR using a red LD, we obtained characteristics that ranged up to about 8 m, even with a 10% reflective blackboard, and about 3 times that with a 90% reflective white board. In addition, a laser power supply with a visible LD was achieved with more than 90% light transmission efficiency in both the red and the blue LDs. We also successfully demonstrated visible-laser feeding to a moving object that was detected by visible-light LiDAR.View full abstractDownload PDF (1157K)
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