US 12,007,387 B2
Analysis threshold generation device and analysis threshold generation method
Atsushi Saito, Yokohama (JP); Makoto Itonaga, Yokohama (JP); Masayuki Ono, Yokohama (JP); Shigehiko Iwama, Yokohama (JP); and Masahiro Yamamoto, Yokohama (JP)
Assigned to JVCKENWOOD CORPORATION, Yokohama (JP)
Filed by JVCKENWOOD Corporation, Yokohama (JP)
Filed on Dec. 4, 2020, as Appl. No. 17/111,874.
Application 17/111,874 is a continuation of application No. PCT/JP2019/020060, filed on May 21, 2019.
Claims priority of application No. 2018-108514 (JP), filed on Jun. 6, 2018.
Prior Publication US 2021/0088508 A1, Mar. 25, 2021
Int. Cl. G01N 33/543 (2006.01); G01N 21/25 (2006.01); G01N 21/41 (2006.01)
CPC G01N 33/543 (2013.01) [G01N 21/255 (2013.01); G01N 21/41 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An analysis threshold generation device comprising:
an optical pickup configured to irradiate, with an irradiation light, an analysis substrate of an optical disc, the analysis substrate of the optical disc having a surface to which a detection target substance and a particle bound to the detection target substance are fixed, and receive a reflection light of the irradiation light from the analysis substrate to generate a light reception level signal;
a threshold calculation unit configured to generate a pair of thresholds for a pulse width of a pulse included in the light reception level signal or a pair of thresholds for a pulse amplitude of the pulse, the pair of thresholds for the pulse width including a pulse width upper-limit time which is a threshold time of the pulse width on an upper limit side and a pulse width lower-limit time which is a threshold time of the pulse width on a lower limit side, and the pair of thresholds for the pulse amplitude including an amplitude upper-limit voltage which is a threshold voltage of the pulse amplitude on an upper limit side and an amplitude lower-limit voltage which is a threshold voltage of the pulse amplitude on a lower limit side;
a pulse determination unit configured to determine whether the pulse width is present within a range of the pair of thresholds for the pulse width or determine whether the pulse amplitude is present within a range of the pair of thresholds for the pulse amplitude;
a pulse count unit configured to count the pulse determined to be present within the range of the generated pair of thresholds by the pulse determination unit, and output a count value of the pulse counted;
a threshold correction unit configured to generate a pair of thresholds used for analysis in accordance with the pair of thresholds generated by the threshold calculation unit and the count value output from the pulse count unit; and
a drive controller configured to control a position of the optical pickup so as to repeatedly measure a same position every time at least one of the pair of thresholds is changed by the threshold calculation unit,
wherein the drive controller is configured to control the optical pickup so as to move the optical pickup to a measurement start position in order to repeatedly measure the same position every time at least one of the pair of thresholds is changed by the threshold calculation unit, and
wherein the threshold calculation unit is configured to repeatedly generate a new pair of thresholds in which at least one of the pair of thresholds is changed every time the pulse count unit counts the pulse until reaching a predetermined value.