This paper presents an integrated high temperature ultrasonic transducer (HTUT) on a sensor insert and its application for real-time diagnostics of the conventional hot embossing process to fabricate V-cut patterns. The sensor was directly deposited onto the sensor insert of the hot embossing mold by using a sol-gel spray technique. It could operate at temperatures higher than 400 °C and uses a...

An ultrasonic sensor has been used for detecting the amount of adulteration in full cream milk with water. The sample under test is filled in a rectangular perplex glass cell, containing ultrasonic transmitter and receiver which is kept in through transmitter mode for generating the ultrasonic waves. The acoustic wave passing through the sample gets attenuated. The level of

The matched spectrum and correlation characteristics are both important to realize the multichannel ultrasonic sensors working together. The spectrum matching can make full use of the bandwidth of the ultrasonic ranging system, and the good correlation characteristic can eliminate crosstalk among multichannel ultrasonic sensors triggering simultaneously. Linear frequency modulation (LFM) excita...

In this paper, absolute positioning instrument using trilateration ultrasonic sensor is mainly proposed to estimate absolute position errors combined with estimated position and orientation from differential odometry integrated with gyroscope to calculate absolute position of mobile robot. In the method, the indirect Kalman filter is mainly used to estimate absolute position errors and the esti...

BACKGROUND Because gastrointestinal cancers are generally firm, the presence and extent of a tumor can be assessed by touch during surgery. However, an objective scale for evaluating tissue hardness does not exist. We developed a new instrument, the endoscopic ultrasonic tactile sensor, that allows objective evaluation of hardness. In this study the usefulness of this device for diagnosis of th...

In this research, the sensitivity distribution properties of a phase-shifted fiber Bragg grating (PS-FBG) to ultrasonic waves were investigated employing the surface attachment method. A careful consideration was taken and examined by experimental results to explain that the distances and angles between the sensor and ultrasonic source influence not only the amplitudes, but also the initial pha...

Ultrasonic imaging and tissue characterization is a noninvasive technique widely used in medicine for many years to assess body conditions. However, the expertise required to operate the equipment and interpret the results is not always available. The medical ultrasonography project is developing a system concept for a remotely steerable, multibeam ultrasonic scanner that can be operated by ski...

Diffuse ultrasonic signals received from ultrasonic sensors which are permanently mounted near, on or in critical structures of complex geometry are very difficult to interpret because of multiple modes and reflections constructively and destructively interfering. Both changing environmental and structural conditions affect the ultrasonic wave field, and the resulting changes in the received si...

During the research within the MAURO (Mobile Autonomous Robot) project (1995 – 1998) the research team from the 'Robot Control Systems' Laboratory has designed and realized an ultrasonic range finding sensor intended to be used in mobile robot navigation. The sensor has been successively improved and the design was adopted also by other research teams within the Automation Department being used...