PROBLEM TO BE SOLVED: To provide a medicine solution administration device controlling an amount of solution at high accuracy with a compact configuration.SOLUTION: A main body 2 of a medicine solution administration device 1 is structured as follows: a magnet 68 is placed on a diaphragm 64 of an injection pump 44 a detection part 69 composed of a Hall element 67 is mounted in the vicinity of the magnet and a detection signal SD corresponding to a displacement width of the diaphragm 64 is generated in non-contact state by the Hall element 67. The main body 2 controls a voltage control signal CV to control the detection signal SD to feed back so as to come close to a target voltage, so that the displacement width of the diaphragm 64 is made close to a target distance to meet a unit discharge amount to a target discharge amount. Accordingly, the main body 2 controls a supply time of the voltage control signal CV to discharge the target discharge amount of the medicine solution as many times as desire and thereby the administration amount of the medicine solution can be adjusted at high accuracy.COPYRIGHT: (C)2015,JPO&INPIT【課題】小型の構成により液体の供給量を高精度に制御できるようにする。【解決手段】薬液投与装置1の本体部2は、注入ポンプ44のダイヤフラム64に磁石68を配し、その近傍にホール素子67でなる検出部69を設け、非接触にてホール素子67によりダイヤフラム64の変位幅に応じた検出信号SDを生成する。また本体部2は、電圧制御信号CVを制御して検出信号SDを目標電圧に近づけるようフィードバック制御することにより、当該ダイヤフラム64の変位幅を目標距離に近づけて、単位吐出量を目標吐出量に合わせることができる。従って本体部2は、電圧制御信号CVの供給時間を制御することにより、目標吐出量の薬液を所望回数だけ吐出できるので、薬液の投与量を高い精度で調整することができる。【選択図】図11
