Measuring and testing – Vibration – By mechanical waves
Patent
1994-01-14
1995-01-17
Arana, Louis
Measuring and testing
Vibration
By mechanical waves
73653, G01N 2900
Patent
active
053816951
ABSTRACT:
An apparatus for investigating a sample with ultrasound has a probe head formed by a casing, a transducer element of piezoelectric plastics material, and a source for applying a high frequency pulse to the sample. The source is preferably one end of an optical fibre, which fibre extends to a laser remote from the probe head. The transducer element is connected to the sample by an acoustic coupling medium, e.g. water. Thus, the probe head can be moved relative to the sample, and a compact, but efficient, structure is achieved.
REFERENCES:
patent: 4137991 (1979-02-01), Melcher et al.
patent: 4241611 (1980-12-01), Specht et al.
patent: 4379409 (1983-04-01), Primbsch et al.
patent: 4567769 (1986-02-01), Barkhoudarian
patent: 4683750 (1987-08-01), Kino et al.
Aindow, A. M. et al., The Efficient Production of Acoustic Pulses at Free Metal Surfaces by Q-Switched Lasers, Proc. of the 4th Nat. Quant. Electronics Conf., 19-21 Sep. 1979, pp. 255-258.
Hutchins, D. A. et al., Laser Generation of Longitudinal and Shear Pulses in Metals, Proc. of the Inst. of Acoustics, 8-11 Apr., 1980, pp. 281-285.
Aindow, A. M. et al., "Laser Generation of Directional Surface Acoustic Wave Pulses in Metals", Optics Communications, vol. 42, No. 2, Jun. 1982.
Burger, C. P. et al., Journal of Nondestructive Evaluation, vol. 7, No. 1, 1987 "Laser Excitation Through Fiber Optics for NDE", pp. 57-64 (month unknown).
von Platte, M., Institut fur Technische Akustik der Rheinisch-Westfalschen Technischen Hochschuel, Aachen, 1983, "Ultraschallwandler aus Polyvinylidendifluorid mit breitbandigem Ubertragungsverhalten und fokussierrenden Eigenshaften" pp. 23-32. (month unknown).
Aindow, A. M., et al., The Laser-generation of Surface Elastic Waves at Free Metal Surfaces, Proc. of the Inst. of Acoustics, 8-11 Apr., 1980, pp. 277.gtoreq.280.
Scruby, C. B. et al., Quantitative Studies of Thermally-generated Elastic Waves in Laser-irradiated Metals, J. Appl. Phys., 51, pp. 6210-6216, 1980 (month unknown).
Aindow, A. M. et al., Characteristics of a Laser-generated Acoustic Source in Metals, Proc. of 1980 Euro. Conf. on Optical Systems and Applications, SPIE, vol. 236, pp. 478-485, 1980 (month unknown).
Aindow, A. M. et al., Laser-generated Ultrasonic Pulses at Free Metal Surfaces, J. Acoust. Soc. Amer., 69, pp. 449-455, 1981. (month unknown).
Hutchins, D. A. et al., Laser-generated Ultrasound at Modified Metal Surfaces, Ultrasonics, 19, pp. 103-108, 1981 (month unknown).
Scruby, C. B. et al., A Laser-generated Standard Acoustic Emission Source, Materials Evaluation, 39, pp. 1250-1254, 1981 (month unknown).
Hutchins, D. A. et al., Estimation of Liquid Depth by Laser Generation of Ultrasound, Acoustic Letters, 4, pp. 95-99, 1980 (month unknown).
Hutchins, D. A. et al., Laser Generation as a Standard Acoustic Source in Metals, Appl. Phys. Lett., 38, pp. 677-679, 1981 (month unknown).
Hutchins, D. A. et al., Mechanisms of Laser-generated Ultrasound by Directivity Pattern Measurements, Proc. of Ultrasonics, 1981, 30 Jun.-2 Jul., pp. 20-25 (month unknown.).
Scruby, C. B. et al., Quantitative Studies of Laser-generated Acoustic Waveforms, Proc. of Ultrasonics, 1981, 30 Jun.-2 Jul., pp. 129-134.
Dewhurst, R. J. et al., Quantitative Measurements of Laser-generated Acoustic Waveforms, J. Appl. Phys., 53, pp. 4064-4071, 1982 (month unknown).
Hutchins, D. A. et al., Some Applications of Laser-generated Ultrasound in Metals, Proc. IEEE, 1981, Ultrasonic Symposium, pp. 798-801 (month unknown).
Hutchins, D. A. et al., Directivity Patterns of Laser-generated Ultrasound in Aluminum, J. Acoustic. Soc. Amer., 70, pp. 1362-1369, 1982 (month unknown).
Aindow, A. M. et al., Laser-generation of Directional Surface Acoustic Wave Pulses in Metals, Opt. Comm., 42, pp. 116 129, 1982 (month unknown).
Scruby, C. B. et al., Laser-generation of Ultrasound in Metals, Research Techniques in Non-destructive Testing, vol. V., Chp. 8, pp. 281-327, Academic Press, 1982 (month unknown).
Aindow, A. M. et al., The Physics of Laser-generated Surface Acoustic Waves in Metals, Quantum Electronics and Electro-Optics, ed. P. L. Knight, John Wiley, pp. 427-430, 1983 (month unknown).
Dewhurst, R. J. et al., The Performance of Thick Piezoelectric Transducers as Wideband Ultrasonic Detectors, Ultrasonics, 21, pp. 79-84, 1984 (month unknown).
Aindow, A. M. et al., Crack Depth Estimation Using Wideband Laser Generated Surface Acoustic Waves, Proc. of Ultrasonics '83, (Halifax, Canada), pp. 20-24 (month unknown).
Dewhurst, R. J., A Hand-held Laser-generator of Ultrasonic Pulses, Non-detructive Testing Communications, 1, pp. 93-104, 1983 (month unknown).
Aindow, A. M. et al., Laser-based Non-destructive Testing Techniques for the Ultrasonic Characterisation of Sub-surface Flaws, NDT International, 17, pp. 329-336 1984 (month unknown).
Cooper, J. A. et al., The Application of Laser-generated Ultrasound to the Remote Testing of Laminar Defects, Proc. of Ultrasonics International '85 (Brighton, UK) pp. 207-212 (month unknown).
Crosbie, R. A. et al. Flexural Resonance Measurements of Clamped and Partially Clamped Discs, Excited by Nanosecond Laser Pulses, J. Appl. Phys. 59, pp. 1843-1848, 1986 (month unknown).
Cooper, J. A. et al., Characterisation of Surface Breaking Defects in Metals Using Laser-generated Ultrasound, Phil. Trans. Roy. Soc. London, Series A, 320, pp. 319-328, 1986 (month unknown).
Cooper, J. A. et al., Surface Acoustic Wave Interactions With Cracks and Slots: A Noncontacting Study Using Lasers, IEEE Trans. in Ultrasonics, Ferroelectrics and Frequency Control, UFFC-33, pp. 462-470, 1986 (month unknown).
Dewhurst, R. J. et al., A Passively Mode-locked Nd:YAG Laser Using a Half-symmetric Unstable Resonator with Continuous Output Coupling, Optics Communications, 60, pp. 175-180, 1986 (month unknown).
Dewhurst, R. J. et al., Further Evidence for Two-component Surface Acoustic Wave Reflections from Surface-breaking Slots, Appl. Phys. Lett., 49, pp. 1694-1695, 1986 (month unknown).
Dewhurst, R. J. et al., Non-contact Detection of Surface-breaking Cracks Using a Laser Acoustic Source and an Electromagnetic Acoustic Receiver, Appl. Phys, Lett., 49, pp. 374-376, 1986 (month unknown).
Dewhurst Richard J.
Payne Peter A.
Arana Louis
British Technology Group Ltd.
Manus Peter J.
LandOfFree
Apparatus for investigating a sample with ultrasound does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for investigating a sample with ultrasound, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for investigating a sample with ultrasound will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-741299