G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 23/20 (2006.01) G01N 29/04 (2006.01) G01N 29/36 (2006.01)
Patent
CA 2407511
A noncontact physical property measurement instrument which easily and accurately measures physical properties of an object using a nondestructive, noncontact sensor. A noncontact physical property measurement instrument 1 is provided with a transmitting section 21 and a receiving section 22. The transmitting section 21 sends a wave to an object 41 in a medium 100, and the receiving section 22 receives a wave reflected from the object 41 and the surface of a coating 42. Both the transmitting section 21 and the receiving section 22 are connected to a gain change correction circuit 13 to form a self-excited oscillating circuit 11 serving as a feedback loop. The gain change correction circuit 13 corrects the gain to the increase side according to a phase difference between the sent wave and the reflected wave, to thereby measure any changes due to a difference in physical properties of the object 41.
L'invention porte sur un instrument facilitant l'obtention de mesures non destructives précises de propriétés physiques au moyen d'un capteur sans contact. L'instrument (1) de mesure sans contact comprend un émetteur (21) et un récepteur (22). L'émetteur (21) envoie une onde à un objet subissant un test (41) dans un milieu (100), le récepteur (22) recevant une onde renvoyée par l'objet (41) recouvert d'un revêtement (42). L'émetteur (21) et le récepteur (22) sont raccordés à un circuit (13) de commande de gain de façon à former un oscillateur (11) à auto-excitation servant de circuit à réaction. Le circuit (13) de commande de gain augmente le gain en fonction de la différence de phase entre l'onde émise et l'onde réfléchie de façon à faciliter l'obtention de mesures précises des variations dues à la diversité des propriétés physiques de l'objet (41).
Marks & Clerk
School Juridical Person Nihon University
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