US 12,442,764 B2
Turbidimeter
Young Dug Kim, Seongnam-si (KR); and Kyoung Man Cho, Seoul (KR)
Assigned to THE WAVE TALK, INC., Daejeon (KR)
Filed by THE WAVE TALK, INC., Daejeon (KR)
Filed on May 30, 2023, as Appl. No. 18/203,352.
Application 18/203,352 is a continuation of application No. PCT/KR2021/017779, filed on Nov. 29, 2021.
Claims priority of application No. 10-2020-0165150 (KR), filed on Nov. 30, 2020.
Prior Publication US 2023/0366816 A1, Nov. 16, 2023
Int. Cl. G01N 21/47 (2006.01); G01N 21/51 (2006.01)
CPC G01N 21/4788 (2013.01) [G01N 21/51 (2013.01); G01N 2021/479 (2013.01); G01N 2021/513 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A turbidity meter comprising:
a main body;
a fluid container which is formed inside the main body and in which a fluid is accommodatable;
a fluid inlet pipe which is connected to the fluid container and via which the fluid is supplied to the fluid container;
a fluid outlet pipe which is connected to the fluid container and via which the fluid is discharged from the fluid container to the outside;
a wave source configured to irradiate waves toward the fluid container;
a detector configured to detect a laser speckle at every time point set in advance, the laser speckle being generated due to multiple scattering of the irradiated waves in the fluid; a controller configured to estimate presence or absence of impurities in the fluid in real-time by using the detected laser speckle; and
a calibration button configured to turn on or off a calibration function, the calibration function being configured to periodically inject a standard material having a known measurement value into the fluid container, and wherein dissolved oxygen present in the fluid is removed by periodically supplying the fluid into the fluid container via the fluid inlet pipe and discharging the fluid from the fluid container via the fluid outlet pipe.