(Nikkei BP Group)
(No.1 High-Tech News Site in Japanese)
| Fujitsu Ten, Furukawa Make Radar for Smart Transport
February 17, 1999 (TOKYO) -- Fujitsu Ten Ltd. and Furukawa Electric Co.,
Ltd. each are developing a millimeterwave radar for automotive applications,
Nikkei Electronics learned.
|The radar, which has a frequency band of 76GHz to 77GHz, will be used
for a system of automatic distance control between cars going in the
same direction. It measures distance and relative velocity between a
car running ahead and the radar itself, and controls the speed of the
car on which the radar is installed.
This system is one of the core technologies to achieve automatic car
driving that constitutes an intelligent transport system (ITS).
Although systems with infrared rays already have been put to use, infrared
rays used to cause errors in measuring distances or speeds due to diffused
reflections under rainy or foggy weather conditions. Radar with a several
millimeter wavelength can detect cars running about 100m ahead under
bad weather conditions.
Fujitsu Ten uses a method called the frequency modulated continuous wave
(FMCW). Distance and speed are detected using a system with a simple
Antennas for sending and receiving radar, which were separated previously,
are integrated into a unit. Frequencies are changed between the transmission
and receiving modes with a separation of several MHz. That downsized
the system to a size 106mm x 88mm x 113mm.
The company will start sampling the products to car makers in spring
or summer of 1999.
Furukawa created its prototype system using the spectrum diffusion method,
which is robust against radio interceptions. It uses an antenna for
transmission and three for receiving. Its date for commercialization
is not yet decided.
� Japan Aims to Complete Intelligent Transport Systems Architecture
� Nissan Motor Exhibits Intelligent Concept Car in Korea
� 'Connected' Car Becomes a Reality
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