| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a liquid conveying device which can exactly control a total amount of discharge. <P>SOLUTION: The liquid conveying device 1 includes a tube 50, a cam 20 having protrusions 22-25, fingers 40-46 arranged along the tube 50 between the tube 50 and cam 20, wherein the cam 20 rotates to sequentially push the fingers 40-46 by the protrusions 22-25 in a flowing direction of a fluid, repeatedly closing by pressing and opening the tube 50 to discharge the fluid. The liquid conveying device 1 further includes a driving rotor 120 to rotate the cam 20, a detection part which detects a rotating position of the cam 20, and a control part 140 which calculates a cam rotation angle corresponding to a cumulative discharge volume, using a first approximation formula for a discharge area H where the cumulative discharge volume increases substantially in proportion to the rotation angle of the cam 20 and a second approximation formula for a constant area J where the cumulative discharge volume hardly increases or decreases even if the cam 20 rotates, and lets the driving rotor 120 drive until a rotating position of the cam 20 corresponding to a designated cumulative discharge volume is reached. <P>COPYRIGHT: (C)2012,JPO&INPIT |
