3-D I m a g e R e c o g n i t i o n S y s t e m f o r D r i v e A s s i s t
Keiji S a n e y o s h i , Keiji Hanawa, Katsuyuki Kise, Y o s h i y u k i S o g a w aS u b a r u R e s e a r c h C e n t e r Co., ltd. 3-9-6 Ohsawa, Mitaka, Tokyo, 181, J A P A N P h o n e (
ABSTRACT (1) Detectable d i s t a n c e T h e d e t e c t a b l e d i s t a n c e is e v a l u a t e d A n e w t h r e e -d i m e n s i o n a l i m a g e f r o m t h e v e l o c i t y o f t h e v e h i c l e a n d a recognition system has been d e v e l o p e d t o t o t a l t i m e w h i c h i n c l u d e s t h e r e c o g n i z e r o a d b o u n d a r i e s a n d o b s t a c l e s . r e c o g n i t i o n t i m e , r e s p o n s e t i m e a n d a c t i v e b r a k i n g o r s t e e r i n g t i m e . T h e T h e i y s t e m is b a s e d o n s t e r e o s c o p y , a n d it c a n d e t e c t t w o w h i t e la n e m a r k s , t w o fences along t h e road and as m a n y a s s i x o b s t a c l e s s i m u l t a n e o u s l y w i t h i n 0.1
Polyimide films are insulating plastic materials that are useful over a wide temperature range and the most radiation resistant of the polymers. In this paper, mechanical property changes of the polyimide film, KAPTON, caused separately by 14-MeV neutrons and by cobalt-60 gamma rays are examined in detail. Miniature tension specimens of 3-mil-thick film were irradiated at Rotating Target Neutron Source-II and at the Cobalt-60 Pool of Lawrence Livermore National Laboratory at room temperature to a maximum neutron fluence of 1.6 × 1022 n/m2 and a maximum gamma dose of 8.6 × 107 Gy, respectively. Neutron fluences greater than 1 × 1021 n/m2 and gamma dose greater than 2.2 × 107 Gy caused a reduction in total elongation of the film. At our highest tested neutron fluence of 1.6 × 1022 n/m2, the elongation dropped to less than one-fifth and the fracture stress dropped to one-third of the unirradiated value. It was found that 14-MeV neutrons were about eight times more effective than cobalt-60 gamma rays in producing mechanical property changes when compared on the basis of absorbed dose. Color changes induced by irradiation were also examined.
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