Synchronous high-speed photographing method and device for microparticle rotation in liquid cyclone field

US10598585B2 · kind B2 · utility

Assignee

• East China University of Science and Technology · CN

Inventors

• Hualin Wang · Shanghai, CN
• Yuan Huang · Tangxia, CN
• Yang Qiu · Blacksburg, US
• Pengbo Fu · Shanghai, CN
• Yanhong Zhang · Shanghai, CN
• Zhishan Bai · Shanghai, CN
• Qiang Yang · Fremont, US
• Fengqin He · Shanghai, CN

Key dates

• Filing date: Jun 15, 2015
• Grant date: Mar 24, 2020
• Expiry date: Jul 15, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N23/74
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and a device for synchronous high-speed photographing of microparticle rotation in a liquid cyclone field and for determining the rotation velocity of a microparticle in a liquid cyclone field by using a combination of a synchronous high-speed photographing system and a transparent microparticle containing two centrosymmetrically arranged inner cores having the same diameter. The method comprises: using a transparent microparticle comprising two inner cores having the same diameter and arranged centrosymmetrically as a rotation test particle; acquiring synchronously two groups of two dimensional image series of microparticle motion in a liquid cyclone field using two orthogonally arranged high-speed digital cameras; and reconstructing a three dimensional motion trajectory of the microparticle from the two groups of synchronous image series, and determining a rotation velocity of the microparticle in the cyclone field at the same time.