Based on this analysis, a new management of partial occlusion for MEMS micropump is finally proposed. The effect of partial occlusion on the pressure profiles has been also simulated. The experimental pressure profiles measured during the actuation phase have been used to validate the numerical modeling. The numerical modeling is a reliable way to better understand the behavior of the micropump in case of failure. insulin pump, collagen enhancer small-scale piezoelectric pump, generation device which. A bridge-type circuit is proposed as the self-sensing circuit, the piezoelectric. Utilizing the voltage generated by the secondary direct piezoelectric effect as the sensing voltage, a soft sensor of the piezoelectric actuator can be implemented onto the piezoelectric micropump. Piezo-electric transducer space technology drive novel insulin pump. This paper presents a new flow rate monitoring method for a piezoelectric micropump based on a self-sensing circuit. The pressure profiles delivered by the sensors are continuously analyzed during the therapy in order to detect failures like occlusion. In situ real-time measurement for micro-structured. This device comprises a reservoir in direct communication with the inlet check valve, a pumping membrane actuated by a piezo actuator, two integrated piezoresistive pressure sensors, an anti-free-flow check valve at the outlet, and finally a fluidic pathway up to the patient cannula. The controller 302 is an embedded digital controller (a microcontroller or a low power FPGA chip). A drive circuit 304 connects the controller 302 to the linear actuator motor 15. The pump is controlled by a single controller. The body consists of a base plate and three titanium foils: two valve foils and one actuator foil. The piezoelectric dual-syringe insulin pump includes a single piezoelectric motor configured to pump insulin. A disposable piezoelectric micropump with high performance for closed-loop insulin therapy system. The pump includes a titanium body in combination with a glued on piezoelectric disc actuator (PIC 151, d 16 mm 200 m) (Fig. A numerical model based on equivalent electrical networks has been built to simulate the dynamic behavior of a positive-displacement MEMS micropump dedicated to insulin delivery. The piezoelectric diaphragm pump, which uses a piezoelectric actuator as a drive unit, is a common form of positive displacement pump.
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