US 12,216,083 B2
Method for detecting presence/absence of liquid suctioned by syringe pump, and device with syringe pump
Masahito Yahata, Kyoto (JP)
Assigned to SHIMADZU CORPORATION, Kyoto (JP)
Appl. No. 17/418,135
Filed by SHIMADZU CORPORATION, Kyoto (JP)
PCT Filed Jun. 17, 2019, PCT No. PCT/JP2019/023813
§ 371(c)(1), (2) Date Jul. 23, 2021,
PCT Pub. No. WO2020/136944, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-244142 (JP), filed on Dec. 27, 2018.
Prior Publication US 2022/0099626 A1, Mar. 31, 2022
Int. Cl. G01N 27/60 (2006.01); G01N 33/18 (2006.01); G01N 35/10 (2006.01)
CPC G01N 27/605 (2013.01) [G01N 33/18 (2013.01); G01N 35/1016 (2013.01); G01N 35/1097 (2013.01)] 7 Claims
OG exemplary drawing
 
4. A device comprising:
a syringe pump comprising:
a syringe having a tubular shape, and
a piston operated in the syringe in an axial direction of the syringe;
a pair of electrodes provided to the syringe and configured to measure an electrostatic capacitance within the syringe between the pair of electrodes such as to determine when a liquid suction into the syringe has been performed and when the liquid suction into the syringe has not been performed;
a detector configured to detect a value of electrostatic capacitance between the pair of electrodes or a value that changes in conjunction with a change in the electrostatic capacitance; and
a liquid suction detector configured to detect that the liquid suction by the syringe pump has been performed based on the change in electrostatic capacitance between the pair of electrodes or the change in the value that changes in conjunction with the change in the electrostatic capacitance detected by the detector.