PROBLEM TO BE SOLVED: To provide a drip detector with high droplet detection accuracy.SOLUTION: The drip detector according to the present invention for outputting a detection signal of a droplet dropping in a drip tube, to an infusion pump body constituting an infusion pump, includes: a droplet fall control part that repetitively performs, as one scan, a series of steps of causing a plurality of light-emitting devices to sequentially emit light and, before the light emission of the respective light-emitting devices, inserting a lights-out period when all the light-emitting devices are turned off and a data processing part. The data processing part acquires a total output voltage variation for each scan. The total output voltage variation is a difference between a sum total of the output voltages when corresponding light-receiving devices receive light of the respective light-emitting devices, and a sum total of the output voltages during the respective lights-out periods.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】液滴の検出精度が高い、点滴検出器を提供する。【解決手段】本発明の点滴検出器は、輸液ポンプを構成する輸液ポンプ本体へ、点滴筒内を落下する液滴の検出信号を出力するための点滴検出器であって、複数の発光素子を順次発光させ、各発光素子の発光の前に、全ての発光素子が消灯している消灯期間をおく、という1連のステップを1スキャンとして繰り返し行う、滴落制御部と、データ処理部とを含む。データ処理部は、1スキャン毎に総出力電圧変化量を得る。前記総出力電圧変化量は、各発光素子の光を対応する受光素子が受光した時の出力電圧の合計と、各消灯期間中における出力電圧の合計との差である。【選択図】図1
