Infocommunications and Social Infrastructure systems R and nter

Japan

Infocommunications and Social Infrastructure systems R and nter

Japan

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Ishigaki Y.,Power system R and D center | Kimura Y.,Power system R and D center | Matsusue I.,Infocommunications and Social Infrastructure systems R and nter | Miyoshi H.,Infocommunications and Social Infrastructure systems R and nter | Yamagishi K.,Power system R and D center
SEI Technical Review | Year: 2014

We have developed an energy management system (EMS), which controls power generation and consumption optimally based on the mixed integer linear programming method. The EMS has now been under long term and verification using the isolated micro grid in our Osaka Works, comprising renewable energy sources, a secondary battery and loads. The system aims to control unstable renewable energy, monitor the battery's state of charge (SOC), and maintain the automatic operation. The system has successfully achieve the goals and have operated for over one year without any significant failure.


Yano J.,Infocommunications and Social Infrastructure Systems R and nter | Nishimura S.,Sumitomo Electric | Fukunaga K.,Sumitomo Electric | Nakajima M.,Sumitomo Electric | And 2 more authors.
SEI Technical Review | Year: 2014

Against the global backdrop of increasingly strict fuel regulations, the number of electrical vehicles (EV) is expected to rise dramatically. However, EVs have less mileage than gasoline vehicles. While efforts have been made for the improvement of battery performance, we also use different approaches to this issue. In this study, we developed an engine that can estimate EV power consumption by building a model formula corresponding to the characteristics of each road link. To devise this formula, a distributed processing platform was adopted. We also developed an application platform that supports route planning by providing the drivers with information about power consumption and battery charging stations. These developments will contribute to the creation of a sustainable society by promoting the use of EVs and reducing CO2 emissions.


Nagashima Y.,Infocommunications and Social Infrastructure systems R and nter | Hattori O.,Infocommunications and Social Infrastructure systems R and nter | Kobayashi M.,Systems and Electronics Division
SEI Technical Review | Year: 2014

Originally, traffic control has been aimed at the safety and comfortableness of transportation. Recently, there has been a growing demand for reducing CO2 emissions by intelligently controlling traffic signals depending on traffic conditions. However, this requires many detectors and high installation costs. To address this problem, we have focused on the probe data collected by vehicles through GPS or other devices. We have developed a signal control system that calculates consecutive spatial traffic information (spatial data), such as queue length, based on the probe data. In the simulation experiments conducted by the UTMS (Universal Traffic Management System) Society of Japan*1, we demonstrated this system and presented the possibility of reducing the number of detectors.


Yamada M.,Infocommunications and Social Infrastructure Systems R and nter | Shiranaga H.,Infocommunications and Social Infrastructure Systems R and nter | Urayama H.,Infocommunications and Social Infrastructure Systems R and nter | Saito F.,Infocommunications and Social Infrastructure Systems R and nter
SEI Technical Review | Year: 2014

The intelligent transport system (ITS) using the 700 MHz band accommodates both road-to-vehicle communications (RVC) and inter-vehicle communications (IVC) with a single channel by assigning different transmission time periods for each roadside unit (RSU) and on-board equipment (OBE). As each RSU sends its transmission timestamps and related data (RSU slots) to OBE nearby, each RSU needs to maintain accurate time synchronization for efficient and stable time division control. This paper investigates the causes and effects of the degradation of RSU synchronization and presents a potential solution in simulation and field tests.


Yano A.,Infocommunications and Social Infrastructure Systems R and nter
SEI Technical Review | Year: 2014

Japan, the US, and European countries are striving to improve both vehicles and infrastructure systems in order to reduce the environmental impact of the transportation sector, which constitutes 23% of global carbon dioxide emissions. While continuing the above research and development, they are also appropriately addressing existing and ongoing issues, such as measures for dealing with the aging society, the rehabilitation of old expressways, bridges, and tunnels, and the development of robust, disaster-resistant social infrastructure. The Sumitomo Electric Group is aiming to provide a Smart Connected Society, a platform for safe, human- and environment-friendly transport and social infrastructure on a global scale, based on our technologies and know-how accumulated in the fields of traffic, mobility, and energy, and communication technologies to link these fields.

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