In future domestic context aware applications the location of mobile devices is often required. Ultrasound technology enables high resolution indoor position measurements. A disadvantage of state-of-the-art ultrasonic systems is that several base stations are required to estimate 3D position. Since fewer base stations would lead to lower cost and easier setup, a novel method is presented that r...

In this study, applications of ultrasound in food drying processes have been reviewed. High frequency ultrasonic treatment can be used in food drying processes as a pretreatment or for the improvement of the main process and the traditional driers. Ultrasonic waves at low frequency can also be used as a diagnostic method for measuring properties of the final dried products and controlling the d...

When a new spectrometric method is introduced in the literature, the method is investigated initially with instruments with a number of different designs. Each new application of the spectrometric method requires a set of trial experiments to optimize the instrumental parameters. Eventually the different applications and instrumental designs assist in establishing the fundamental advantages and...

This paper introduces error eliminating rapid ultrasonic$nng(EERUF), a new method for firing multiple ultrasonic sensors in mobilerobot applications. EERUF allows ultrasonic sensors to fire at ratesthat are five to ten times faster than those customary in conventionalapplications. This is possible because EERUF reduces the number oferroneous readings due to ultrasonic noise ...

This work aims to evaluate the efficiency of ultrasonic degassing when applied to the AlSi9Cu3 alloy when compared with other degassing techniques. The mechanism of aluminium degassing is discussed. A suitable ultrasonic degassing apparatus including a novel MMM (Multi-frequency Multimode Modulated) technology, able to supply up to 1.2 kW power under a frequency up to 25 kHz, was developed spec...

Development of an ultrasonic device to image the hardness of tissues is important for a cancer diagnosis. Conventional methods cannot precisely measure the size of object, because the sound speed of an object is unknown. We propose a fuzzy inference system for ultrasonic imaging based on the velocity of materials. This method consists of three stages. In the first stage, the surface of the obje...

High-amplitude ultrasound (u0 > 100 nm) generated by pulsed laser material processing carries important information about the mechanisms of light-material interaction and the propagation of the wave within the work-piece. In addition, it can also be applied for the purpose of non-destructive evaluation of the sample. The propagation of high-amplitude ultrasonic waves inside a plate is measured ...