INVESTIGATION OF ELECTRO-MECHANICAL FACTORS EFFECTING PIEZOELECTRIC ACTUATOR FOR VALVELESS MICROPUMP CHARACTERISTICS
Abstract
In this study, a new micropump was designed which is suitable for medical applications regarding size and flow rate. When a micropump is used to control the amount of drug delivery, the flow rate is a key parameter and can be controlled with the diaphragm displacement. The amount of displacement depends on the thickness of piezoelectric element, voltage, and input frequency. The simulation results showed that the displacement of the vibrating diaphragm increased with applied voltage. Moreover, when the piezoelectric thickness was increased, vibrating diaphragm displacement also was decreased. The flow rate can be adjusted by increasing or decreasing of the input voltage. Presented results also showed that the performance of the micropump was affected by the frequency of voltage. In this study, we analysed two Lead Zirconate Titanate (PZT-2) piezoelectric actuators with 50μm and 100μm thicknesses. The voltage values were 10V, 20V, 30V, 40V and the frequencies were 5Hz and 10Hz, …show more content…
Drug delivery system (DDS) includes medicine reservoir, micropumps, valves, microscopic sensors, microscopic channels and required related circuitries. Micropumps are appropriate tools for drug delivery of medicine reservoir in the body which provides high precision and suitable for modern biotechnology drugs [2-5]. Micropumps can be used for drug delivery with the desired amount of medicines at the appropriate time which improves the therapeutic effect. For example, in some heart diseases, the heart cannot create enough blood pressure. In this case, the micropumps are used to increase and regulate blood pressure in the pulmonary arteries
Abstract
In this study, a new micropump was designed which is suitable for medical applications regarding size and flow rate. When a micropump is used to control the amount of drug delivery, the flow rate is a key parameter and can be controlled with the diaphragm displacement. The amount of displacement depends on the thickness of piezoelectric element, voltage, and input frequency. The simulation results showed that the displacement of the vibrating diaphragm increased with applied voltage. Moreover, when the piezoelectric thickness was increased, vibrating diaphragm displacement also was decreased. The flow rate can be adjusted by increasing or decreasing of the input voltage. Presented results also showed that the performance of the micropump was affected by the frequency of voltage. In this study, we analysed two Lead Zirconate Titanate (PZT-2) piezoelectric actuators with 50μm and 100μm thicknesses. The voltage values were 10V, 20V, 30V, 40V and the frequencies were 5Hz and 10Hz, …show more content…
Drug delivery system (DDS) includes medicine reservoir, micropumps, valves, microscopic sensors, microscopic channels and required related circuitries. Micropumps are appropriate tools for drug delivery of medicine reservoir in the body which provides high precision and suitable for modern biotechnology drugs [2-5]. Micropumps can be used for drug delivery with the desired amount of medicines at the appropriate time which improves the therapeutic effect. For example, in some heart diseases, the heart cannot create enough blood pressure. In this case, the micropumps are used to increase and regulate blood pressure in the pulmonary arteries