Mazda Motor Corporation

Akinori Utsunomiya

Masanori Honda

Tsuyoshi Sugihara

Takanobu Kamura

Masaru Chikita

Chikara Tanaka

Tatsumi Makimae

Shin Sasaki

Kazumoto Tanaka

Kenji Murase

Kouya Nakagawa

Hidenori Ishiide

The present invention is a floor panel structure of a car body that can reduce noise within the automobile cabin. The present invention is a car body floor panel structure wherein the floor of an automobile has a floor panel connected to car body frame members, and also a predetermined mode of vibration is generated to suppress the generation of acoustic emission from the floor panel. The floor panel vibration mode adjusting structure has rectangular rigidity adjusting areas that are formed by causing the floor panel to protrude upward or downward in order to generate 2&#xd7;1 mode or 2&#xd7;2 mode vibration in the floor panel in a frequency band that nearly matches the tire cavity resonance frequency.

Automotive floor panel structure

A floor panel structure of a vehicle body where a vehicle floor has floor panels with their peripheral edges linked to a plurality of frame members that are disposed in a vehicle body lengthwise direction and a vehicle body crosswise direction and linked to an engine or a suspension is disclosed. The floor panel has a joint where at least part of its peripheral edge is joined to the frame member, a groove formed along the entire length of the joint and a high-rigidity area formed within the low-rigidity area. The low-rigidity area forms a vibration blocking area along the entire length of the joint by using a difference in rigidity from the high-rigidity area.

Floor panel structure of vehicle body

A surface defect inspection apparatus includes a light radiation source, arranged to oppose a surface to be inspected serving as a mirror surface, for radiating light having a predetermined change pattern toward the surface to be inspected, a camera mechanism for receiving an image of the light radiation source, reflected by the surface to be inspected and forming a received-light image corresponding to the change pattern of the light radiation source, and a discriminator for discriminating a surface defect portion on the surface to be inspected by discriminating a portion whose change pattern is different from the change pattern on the basis of the received-light image formed by the camera mechanism.

Inspection apparatus with improved detection of surface defects over

Growing community of inventors

Hiroshima-ken, Japan

Akinori Utsunomiya