公开(公告)号：US20190033193A1

公开(公告)日：2019-01-31

申请号：US15755782

申请日：2016-08-10

Applicant: CHELSEA TECHNOLOGIES GROUP LTD

Inventor： Kevin OXBOROUGH ,  John ATTRIDGE ,  David ANDREWES

IPC: G01N15/06 ,  G01N33/18 ,  G01N1/38

CPC classification number: G01N15/06 ,  B63J4/002 ,  C02F1/00 ,  C02F1/008 ,  C02F2103/008 ,  C02F2209/001 ,  C02F2209/36 ,  C02F2303/04 ,  G01N1/38 ,  G01N21/6408 ,  G01N21/6486 ,  G01N33/1826 ,  G01N2001/2064 ,  G01N2001/386 ,  G01N2015/0693 ,  G01N2021/635 ,  G01N2021/6419 ,  G01N2021/6478 ,  G01N2021/6482 ,  G01N2201/0627 ,  G01N2201/0631 ,  G01N2201/0638 ,  G01N2201/064 ,  G01N2201/0696 ,  Y02A20/206

Abstract: A ballast water monitoring device and a method for detecting live phytoplankton are disclosed. The device comprises a chamber for receiving a sample, at least one light source to emit light towards the sample, a light detector to receive light from the sample and generate a light signal, and a controller. The controller is configured to control the at least one light source to emit a single pulse of light, calculate the variable fluorescence [Fv] of the sample in response to the pulse of light, at time intervals less than the duration of the pulse of light, compare the calculated variable fluorescence to a predetermined reference limit, and perform an action if the calculated variable fluorescence is greater than the predetermined reference limit.