Clad ultrasonic waveguides with reduced trailing echoes

Details Clad ultrasonic waveguides with reduced trailing echoes Clad ultrasonic waveguides with reduced trailing echoes

G - Physics

10

K

G10K 11/18 (2006.01) B06B 3/00 (2006.01) G10K 11/24 (2006.01)

Patent

CA 2206090

Ultrasonic buffer rods are useful for on-line process control of industrial material processes at elevated temperatures. In order to increase the signal-to-noise ratio in the reflected ultrasonic waves revealing the information of the condition of the materials being processed, clad ultrasonic waveguides consisting of a tapered or uniform core and a cladding are proposed. The core is made of a low ultrasonic loss material. Preferably, the cladding has a higher ultrasonic velocity than the core. The cladding may be thermally sprayed over the core. The waveguides are simple, rugged, machinable and operable at elevated temperatures.

Des bras amortisseurs ultrasonores sont utiles pour la commande en ligne des procédés appliqués au matériaux industriels à des températures élevées. On propose d'utiliser des guides d'ondes ultrasonores à gaine optique constitués d'un coeur en fuseau ou uniforme et d'une gaine optique, pour augmenter le rapport signal/bruit des ondes ultrasonores réfléchies qui indique l'état des matériaux traités. Le coeur est constitué d'un matériau présentant peu de pertes dans la gamme ultrasonore. Il vaut mieux que la gaine optique se caractérise par une vitesse de propagation plus élevée que le coeur dans la gamme ultrasonore. La gaine optique peut être pulvérisée à chaud sur le coeur. Les guides d'ondes sont simples, robustes, usinables et utilisables à des températures élevées.

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