자동차 디스크 브레이크의 진동 패턴 측정을 위한 전자 스페클 간섭법에 대한 연구

ESPI(Electronic Speckle Pattern Interferometry) is new optical measuring method to be able to measure the dynamic deformations of engineering components and materials in industrial areas. Conventional measuring methods by accelerometers have many difficult problems such as contact and point-to-point measurement. But ESPI that is noncontact. whole fleld measuring method can overcome previous disadvantages. The speckle pattern to be formed with interference phenomenon of scattering light from rough surfaces illuminated by laser light have phase information of surface. In this study we used this interference phenomenon to measure the vibration mode of disk brake. together with the use of digital equipment to process the information contained in the speckle pattern.