Advanced Physical Research

This paper presents a novel approach to medical infusion monitoring through the fusion of time-of-flight (ToF) dual parallel 1D linear optical arrays and high-precision weight metrology. The system, termed Monitick, employs a distributed Bluetooth Low Energy (BLE) architecture to substantially reduce parasitic mechanical noise (viscoelastic creep and hysteresis) inherent in traditional wired load cells. By applying sensor fusion algorithms and Kalman filtering, the system achieves mass flow measurement errors below 3% and an alarm latency under 2 seconds. The optical module transitions from simple binary event counting to precise volumetric estimation by utilizing two parallel non-coplanar 1D arrays to measure droplet velocity and cross-sectional area simultaneously. Cross-validation between the optical and weight sensing modules enables highly reliable detection of critical clinical states, including occlusions and life-threatening free-flow conditions. The research establishes a rigorous analytical foundation for non-interventional treatment support devices, contributing to enhanced patient safety in clinical environments.