Characteristics of 3.5 Kg Pedestrian Headform Impactor Prototypes Developed By JAMA--JARI and ACEA--TNO

Head injuries are the most common cause of pedestrian deaths in car-pedestrian accidents, particularly those involving child pedestrians. In 2004, the Japan Ministry of Land, Infrastructure and Transport officially announced the Japanese standard for the evaluation of car-front safety performance in terms of pedestrian child head protection. This new standard required a 3.5 kg headform impactor as a test tool simulating a child pedestrian head. Currently, the Association of European Car Manufacturers (ACEA) and the Netherlands Organization for Applied Scientific Research (TNO) have jointly developed a 3.5 kg headform impactor in Europe. This article reports on a study undertaken to investigate the availability of the 3.5 kg ACEA-TNO headform impactor in terms of the Japanese standard. The study also reported on the physical characteristics and measured head injury criteria (HIC) of the Japanese and ACEA-TNO headform impactors as a point of reference for the formulation of the Global Technical Regulation (GTR) standards now under way. The study investigated the technical specifications including those regarding mass, outer diameter, moment of inertia, location of centre of gravity, seismic mass location of accelerometers, natural frequency, and biofidelity of these headform impactor prototypes. The skin performance of these prototypes was also determined in terms of Shore hardness, relation of compressive force and deformation, high-velocity certification characteristic, and impact durability against a car hood. Results showed very little variation between the two different prototypes.

  • Availability:
  • Authors:
    • Matsui, Y
    • Takabayashi, M
    • Tanahashi, M
  • Publication Date: 2005


  • English

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  • Accession Number: 01002401
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 25 2005 12:05PM