PRESSURE MEASUREMENT FOR VACUUM MOTOR IN AUTOMATED TELLER MACHINE DISPENSER

S.R Jayalogainiyan, K.S Srijan, A. Vijayalakshmi

Abstract: Pressure measurement for vacuum motor in dispenser unit is a process to find the pressure generated by the vacuum motor present inside the dispenser unit of an Automated Teller Machine (ATM). The dispenser unit is used to load the cash deposited in the ATM machine, a bipolar stepper motor is used as a vacuum motor which is present inside dispenser is used to pick the currency by applying an amount of pressure and withdraw the cash through the cash disburser. The pressure generated by the vacuum motor to pick cash should be equal to the threshold value prescribed by the ATM manufacturer, variation in the pressure may effect in failure of picking cash or incorrect count of cash withdrawal. So this paper concentrates on measuring, displaying and storing the pressure values of vacuum motor present in ATM dispenser. The pressure is measured using pressure flow sensor and exhibited using Liquid Crystal Display (LCD). The ATMEGA-8 microcontroller is interfaced with the computer using USB serial communication and pressure value obtained is displayed using datalogger software.

Keywords: Automated Teller Machine (ATM), datalogger, dispenser, Liquid Crystal Display (LCD), threshold pressure, vacuum motor.

DOI: https://doi.org/10.15623/ijret.2017.0605004