US 11,896,751 B2
Adjusting device for pressure detector
Hideto Maki, Shizuoka (JP); Shinya Hasegawa, Shizuoka (JP); and Yuki Eda, Shizuoka (JP)
Assigned to Nikkiso Company Limited, Tokyo (JP)
Filed by Nikkiso Company Limited, Tokyo (JP)
Filed on Jul. 14, 2020, as Appl. No. 16/928,504.
Application 16/928,504 is a continuation of application No. PCT/JP2019/001545, filed on Jan. 18, 2019.
Claims priority of application No. 2018-006600 (JP), filed on Jan. 18, 2018.
Prior Publication US 2020/0338254 A1, Oct. 29, 2020
Int. Cl. A61M 1/36 (2006.01); A61M 1/16 (2006.01); G01L 7/08 (2006.01); A61M 60/279 (2021.01)
CPC A61M 1/3639 (2013.01) [A61M 1/16 (2013.01); A61M 60/279 (2021.01); G01L 7/08 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An adjusting device for a pressure detector, the pressure detector including
a case connectable to a flow route for liquid, and
a membrane member attached to the case and separating a liquid-phase portion to be supplied with the liquid in the flow route and a gas-phase portion to be supplied with gas from each other, the membrane member being displaceable in accordance with a pressure of the liquid supplied into the liquid-phase portion,
the pressure detector detecting the pressure of the liquid in the flow route by detecting a pressure in the gas-phase portion,
the adjusting device comprising:
piping having one end and an other end, the one end serving as a connecting portion connectable to the gas-phase portion, the other end allowing the gas to be introduced into or discharged from the piping;
a pump that introduces or discharges the gas into or from a portion of the flow route in the piping and the gas-phase portion through the other end of the piping, the piping and the gas-phase portion being connected to each other through the connecting portion;
a closing unit capable of closing a predetermined position of the flow route in the piping and separating the flow route in the piping into a first zone nearer to the other end and a second zone nearer to the one end by the closing;
a control unit capable of controlling the pump and the closing unit and that sequentially executes a first step in which a predetermined adjusting pressure is generated in the first zone by activating the pump with the first zone being closed by the closing of the closing unit, and a second step in which the gas-phase portion, the first zone, and the second zone are combined into a closed space by disabling the closing of the closing unit; and
an adjusting-pressure-acquiring unit that acquires the adjusting pressure to be generated in the first step, the adjusting pressure being acquired in accordance with a relationship between a pressure and a capacity of the first zone in the first step and a pressure and a capacity of the combination of the gas-phase portion, the first zone, and the second zone in the second step,
wherein the control unit brings the membrane member to a position corresponding to the adjusting pressure by executing the second step after activating the pump in the first step in such a manner as to generate the adjusting pressure acquired by the adjusting-pressure-acquiring unit.