Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

HIGH-TEMPERATURE ULTRASONIC TRANSDUCER

IP.com Disclosure Number: IPCOM000196972D
Publication Date: 2010-Jun-22
Document File: 5 page(s) / 25K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present invention discloses an improved design for a high temperature ultrasonic transducer. The pressurization component applies pressure to the piezoelectric element which also acts as one of the electrodes of the transducer element. Additionally piezoelectric element acts as an ultrasonic damping member.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 44% of the total text.

Page 1 of 5

RP13325

HIGH-TEMPERATURE ULTRASONIC TRANSDUCER

BRIEF ABSTRACT

    The present invention discloses an improved design for a high temperature ultrasonic transducer. The pressurization component applies pressure to the piezoelectric element which also acts as one of the electrodes of the transducer element. Additionally piezoelectric element acts as an ultrasonic damping member.

KEYWORDS

    Piezo-electricity, Transducer, High temperature ultrasonic transducer, Energy conversion, Adhesive, Mechanical Coupling, Clamp construction, Corrosion Monitoring System, Ultrasonic Measurement, Piezo-electric crystal, Acoustic impedance, Acoustic stack, Thermal Expansion, Acoustic port, Piezoelectric ceramic, Acoustic Damping, Soldering, Brazing, thin-film plating

DETAILED DESCRIPTION

    Piezoelectric transducers are made of a piezoelectric element that converts electrical energy into mechanical energy and vice versa. However, the piezoelectric element is not useable directly as a transducer to generate and receive ultrasound. A typical transducer structure comprises a piezoelectric crystal (such as quartz) or a piezo-electric ceramic element (such as lead zirconate titanate or PZT).

1

Page 2 of 5

RP13325

    Certain applications require piezoelectric transducers to be used at extremely high temperatures such as 500°C and challenges remain in the electrical, mechanical or acoustic coupling of piezoelectric transducers that are used at extremely high temperatures. The need for such high temperature ultrasonic transducers has been addressed in different ways, including element brazing and clamped constructions. However, such conventional ways result in complex designs and high costs. A reduction in parts and mechanical complexity is desirable for a more reliable and low cost transducer. Therefore, there is a need for a high temperature ultrasonic transducer with a simple mechanical design that has a lower cost an increased reliability.

    The present invention proposes a new design for a high temperature ultrasonic transducer using piezo-electricity. A novel design of high temperature ultrasonic transducer comprises a clamped construction, a pressurization component and a piezoelectric element. Additionally, the piezoelectric element acts as an ultrasonic damping member. The novel design purposes reliable ultrasonic transducers that can operate at high temperature and has long lifetimes.

    Piezo-electric transducers essentially comprise a piezoelectric element that converts electrical energy into mechanical energy and vise versa. However, the piezoelectric element is not used directly as a transducer to generate and receive ultrasound. A typical transducer structure includes an acoustic assembly. The acoustic assembly comprises a piezoelectric crystal (such as quartz) or piezoelectric ceramic (such as PZT) element.

    A front acoustic port is adhered to at least one matching layer that serves multiple functions. The multiple functions served by the front acoustic port i...