A drip monitoring device suitable for mounting on the drip pipe includes a clamp unit clamped outside the buffer groove part of the drip pipe, a detector, a warning device and a controller arranged on the clamp unit.The detector can sense the detection light penetrating the droplet and output a shielding signal.The controller will perform differential calculation on the mask signal and analyze the boundary of the two ends of the signal waveform of the differential signal after differential processing, so as to obtain the passing time of the liquid drop passing through the detector. When the passing time exceeds the first time threshold, the alarm will be driven to send out a warning message representing the excessive drop amount.Through the design of differential processing of the mask signal by the controller, the boundary between the two ends of the differential signal waveform can be more clear and easy to read, and the drop amount can be accurately detected.一種點滴監測裝置，適用於安裝在點滴管，包含一夾置於點滴管之緩衝槽部外的夾具單元、一設置於該夾具單元之偵測器、一警示器，及一控制器。偵測器能感測穿透液滴之偵測光而輸出一遮蔽訊號。控制器會對遮蔽訊號進行微分演算，並分析微分處理後之微分訊號的訊號波形的兩端點邊界，以取得液滴經過偵測器的通過時間，並於通過時間超過第一時間閾值時，驅使警示器發出一個代表液滴之滴量過大的警示訊息。透過控制器會先針對遮蔽訊號進行微分處理的設計，可讓微分後的訊號波形的兩端邊界更為明確而易於判讀，能供準確偵測液滴的滴量。
