Droplet Size Measurement with Linear Charge Coupled Device Camera

摘要

Automatic and remote-controlled measuring devices are required to detect liquid leakage from structures in reactor containment vessels.A new device has been developed to measure a droplet diameter based on the distance between two brilliant spots formed on a droplet surface by the reflection and refraction of a collimated light beam. The device is composed of a collimated beam source, a linear CCD (Charge Coupled Device) camera and a data processor. The measurement error is less than 1% in volume for a 5 mm diameter BK7 ball lens falling within a 200 mm horizontal width at a distance of 1. 75 m.This device is applicable to the measurement of droplet volume within a 200 mm diameter horizontal area with 10% accuracy.