NL7500900A - Nondestructive workpiece testing system - has a two-channel two-transducer test unit using different ultrasonic frequencies - Google Patents

Nondestructive workpiece testing system - has a two-channel two-transducer test unit using different ultrasonic frequencies

Info

Publication number
NL7500900A
NL7500900A NL7500900A NL7500900A NL7500900A NL 7500900 A NL7500900 A NL 7500900A NL 7500900 A NL7500900 A NL 7500900A NL 7500900 A NL7500900 A NL 7500900A NL 7500900 A NL7500900 A NL 7500900A
Authority
NL
Netherlands
Prior art keywords
acoustic
transducers
test unit
nondestructive
channel
Prior art date
Application number
NL7500900A
Other languages
Dutch (nl)
Original Assignee
Automation Ind Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US409078A external-priority patent/US3924454A/en
Priority claimed from US437793A external-priority patent/US3898840A/en
Application filed by Automation Ind Inc filed Critical Automation Ind Inc
Publication of NL7500900A publication Critical patent/NL7500900A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
    • B06B1/0662—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface
    • B06B1/0681—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface and a damping structure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
    • G01N29/348—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with frequency characteristics, e.g. single frequency signals, chirp signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The two electric channels and corresponding transducers operate at different frequencies, and transmit and/or receive ultrasonic energy. The unit comprises a disk-shaped inner piezoelectric transducer, and an annular outer transducer concentric with the former. An acoustic insulating structure between the two transducers minimises acoustic energy transmission between transducers in a radial direction. An inner and outer acoustic transmission devices coupled with the front surfaces of the transducers transmit the acoustic energy to the test unit front element. One of them has an acoustic modification device for differential modification of acoustic waves belonging to the two channels, for optimum acoustic energy transmission to and from the workpiece.
NL7500900A 1973-10-24 1975-01-27 Nondestructive workpiece testing system - has a two-channel two-transducer test unit using different ultrasonic frequencies NL7500900A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US409078A US3924454A (en) 1973-10-24 1973-10-24 Multi-frequency ultrasonic testing system
US437793A US3898840A (en) 1974-01-30 1974-01-30 Multi-frequency ultrasonic search unit

Publications (1)

Publication Number Publication Date
NL7500900A true NL7500900A (en) 1975-08-01

Family

ID=27020495

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7500900A NL7500900A (en) 1973-10-24 1975-01-27 Nondestructive workpiece testing system - has a two-channel two-transducer test unit using different ultrasonic frequencies

Country Status (1)

Country Link
NL (1) NL7500900A (en)

Similar Documents

Publication Publication Date Title
US3075382A (en) Apparatus for acoustically measuring volume
GB957802A (en) Improvements in or relating to ultrasonic transducers
EP0017216A3 (en) Ultrasonic transducer
GB2063612A (en) Signal isolator
GB718260A (en) Ceramic transducer for underwater sound transmission and reception
ES414351A1 (en) Acoustic energy transmission device
NL7500900A (en) Nondestructive workpiece testing system - has a two-channel two-transducer test unit using different ultrasonic frequencies
US3720908A (en) Electromechanical acoustic noise source
GB710124A (en) Improvements in and relating to methods of measuring thickness or density of thin sheets
IE39081B1 (en) Improvements in or relating to ultrasonic signal generators
GB1331841A (en) Electro-acoustic transducer
CA2151116A1 (en) Zig-Zag Electromagnetic Acoustic Transducer Scan
NO153785C (en) DEVICE FOR DETERMINING THE TIME OF RECEIPT FOR AN ACOUSTIC IMPULSE IN A TRANSDUCER.
US2456294A (en) Underwater sound transmitter or receiver
GB931080A (en) Vibrational radiating or receiving apparatus
GB1317162A (en) Material tester and search unit therefor
CA976882A (en) Acoustical impedance matching device for a high impedance transducer
GB912226A (en) Improvements in or relating to ultrasonic testing of materials
US2985009A (en) Differential acoustic transducer
GB1150680A (en) Material Tester
GB774675A (en) Improvements in or relating to apparatus for flaw detection and velocity measurementby ultrasonic echo methods
NL7514910A (en) Ultrasonic testing probe for measuring material thickness - has acoustic insulation between transducers extending through coupling liquid
NL6916129A (en) Ultrasonic welding device
GB1312807A (en) Material tester
JP2015180901A (en) Ultrasound transceiver and ultrasound measuring device

Legal Events

Date Code Title Description
BV The patent application has lapsed