Kazuhiro Hantani
Research Subjects
Research Interests
Kazuhiro Hantani has a total of 5 co-authors. Here are the top co-authors by number of shared publications:
- Akira Asada
Institute of Industrial Science University of Tokyo 4-6-1 Komaba Meguro-ku 153-8505 Tokyo Japan
2 shared publications - Kazuoki Kuramoto
Japan Coast Guard Academy
2 shared publications - Fumitaka Maeda
Institute of Industrial Science, University of Tokyo, Japan
1 shared publication - Mitsuhiko Nanri
Hitachi Limited, Japan
1 shared publication - Yoshinobu Kawashima
Hitachi Limited, Japan
1 shared publication
Latest Publications
- 1 January 2016
- Published by The Marine Acoustics Society of Japan in The Journal of the Marine Acoustics Society of Japan
- Vol. 43 (4) , 276-285
Trial Manufacture of the Underwater Search Support Technique by Using the Forward-looking Sonar
When marine disasters occur, it is sometimes necessary for search and rescue dive teams to begin rescue and recovery efforts before a complete assessment of the underwater safety situation can be conducted. This makes the job of the Coast Guard personnel in charge of these types of operations very risky. In order to alleviate this type of risk and to be able to operate safely in affected areas, it is desirable for the divers to have as much prior knowledge as possible of the physical and spatial aspects of the area. Furthermore, the rapid presentation of this information in a visual manner is critical in order for the divers to be able to clearly understand and quickly interpret the information being presented. This paper discusses a newly developed optimized search and diver support technique that utilizes high-resolution, forward-looking sonar to allow Coast Guard personnel to improve the accuracy of the search operation while also increasing the efficiency and safety factors involved in these types of operations. Concretely, we developed a special mounting hardware for survey launches to install the R2Sonic 2024/2022 as well as the elemental software necessary to support underwater divers. Additionally, we evaluated the function of the software in indicating sonar images on marine charts, making mosaic images, and tracking underwater divers by using the 2024/2022 sonar data acquired in the actual sea area, though the diver tracking requires further improvement.
- 1 January 2016
- Published by The Marine Acoustics Society of Japan in The Journal of the Marine Acoustics Society of Japan
- Vol. 43 (4) , 276-285
Trial Manufacture of the Underwater Search Support Technique by Using the Forward-looking Sonar
When marine disasters occur, it is sometimes necessary for search and rescue dive teams to begin rescue and recovery efforts before a complete assessment of the underwater safety situation can be conducted. This makes the job of the Coast Guard personnel in charge of these types of operations very risky. In order to alleviate this type of risk and to be able to operate safely in affected areas, it is desirable for the divers to have as much prior knowledge as possible of the physical and spatial aspects of the area. Furthermore, the rapid presentation of this information in a visual manner is critical in order for the divers to be able to clearly understand and quickly interpret the information being presented. This paper discusses a newly developed optimized search and diver support technique that utilizes high-resolution, forward-looking sonar to allow Coast Guard personnel to improve the accuracy of the search operation while also increasing the efficiency and safety factors involved in these types of operations. Concretely, we developed a special mounting hardware for survey launches to install the R2Sonic 2024/2022 as well as the elemental software necessary to support underwater divers. Additionally, we evaluated the function of the software in indicating sonar images on marine charts, making mosaic images, and tracking underwater divers by using the 2024/2022 sonar data acquired in the actual sea area, though the diver tracking requires further improvement.
- 1 June 2007
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 1-5
Advanced Surveillance Technology for Underwater Security Sonar Systems
On the Japanese coasts, there are so many important facilities which can be exposed to the threats of terror attacks. So, we built an acoustic video system, modifying a dual-frequency acoustic camera DIDSON and developing an optimum underwater surveillance method and software. In succession, a 100 kHz-frequency Wharf Installed Security Sonar was developed. Its transmitting beam is variable in width and can be steered up and down depending on the installation environments, making it possible to easily detect targets. Recently, we have developed an effective moving surveillance method employing a Shipboard Installed Security Sonar consisting of three transducers, each with a different frequency (110 kHz, 240 kHz and 455 kHz) and all sharing a receiving array to monitor both far and near fields. In the 110 kHz mode, the sonar can monitor a far distance and wide area. With the embedded software we developed for overlaying aerial photo maps on sonar images, we obtained data useful for further research to develop an effective surveillance method. We are now proceeding with this development while implementing in this system the moving surveillance method employing the acoustic video camera.
- 1 June 2007
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 1-5
Advanced Surveillance Technology for Underwater Security Sonar Systems
On the Japanese coasts, there are so many important facilities which can be exposed to the threats of terror attacks. So, we built an acoustic video system, modifying a dual-frequency acoustic camera DIDSON and developing an optimum underwater surveillance method and software. In succession, a 100 kHz-frequency Wharf Installed Security Sonar was developed. Its transmitting beam is variable in width and can be steered up and down depending on the installation environments, making it possible to easily detect targets. Recently, we have developed an effective moving surveillance method employing a Shipboard Installed Security Sonar consisting of three transducers, each with a different frequency (110 kHz, 240 kHz and 455 kHz) and all sharing a receiving array to monitor both far and near fields. In the 110 kHz mode, the sonar can monitor a far distance and wide area. With the embedded software we developed for overlaying aerial photo maps on sonar images, we obtained data useful for further research to develop an effective surveillance method. We are now proceeding with this development while implementing in this system the moving surveillance method employing the acoustic video camera.