An FPGA Based Multiple Output Ultrasonic Generator with Two Step Iterative Resonance Detection

Ulvi Guvenc; Ali Tangel; Mehmet Yakut

This paper presents design and prototype implementation of an FPGA-Based multiple output and multi-functional generator for ultrasonic cleaning machines. The complete generator design has two operating modes named as manual and automatic. The digital part of the complete design including frequency and PWM-controlled pulse generator and display driver unit to monitor power levels of four independent ultrasonic cleaning tanks has been implemented on a single FPGA core. As a result, four independent and fully-parallel cleaning process control have been achieved by way of the proposed modular design architecture. The main scientific contribution of this paper is to advertise a novel resonance frequency detection algorithm called as “two-step iterative resonance frequency detection”. As a result, capturing the resonance frequency for automatic operation mode becomes fast and precise. The paper also adresses the advantages of the FPGA based solution when compared to the traditional microcontroller-based counterparts. The new modular design also reduces the design complexity and provides flexibility to designer in case of different applications. The manual operating mode of cleaning system’s digital implementation consumes 65% of logic capacity while the automatic operating mode’s consumes 98% on a single Altera Cyclone-II FPGA having 5K of logic elements (LE).

Select Volume / Issues:

• Volume 3 Issue 6, Nov. 2012

Year:

2012

Type of Publication:

Article

Keywords:

Ultrasonic cleaning; PWM generator; FPGAs; Embedded Design; Industrial Electronics

Journal:

IJECCE

Volume:

3

Number:

6

Pages:

1410-1421

Month:

November