The probe size and focal properties. The probe frequency, bandwidth an terjemahan - The probe size and focal properties. The probe frequency, bandwidth an Bahasa Melayu bagaimana untuk mengatakan

The probe size and focal properties


The probe size and focal properties.
The probe frequency, bandwidth and efficiency.
The inspection path and distance (water and/or solid).
The interface (surface curvature and roughness).
The flaw location with respect to the incident beam.
The inherent noisiness of the metal microstructure.
The inherent reflectivity of the flaw, which is dependent on its acoustic impedance, size, shape, and orientation.
Cracks and volumetric defects can reflect ultrasonic waves quite differently. Many cracks are "invisible" from one direction and strong reflectors from another.
Multifaceted flaws will tend to scatter sound away from the transducer.

The following formula relates some of the variables affecting the signal-to-noise ratio (S/N) of a defect:
0/5000
Dari: -
Ke: -
Keputusan (Bahasa Melayu) 1: [Salinan]
Disalin!

Saiz siasatan dan sifat tumpuan.
Kekerapan siasatan, jalur lebar dan kecekapan.
Jalan pemeriksaan dan jarak (air dan / atau pepejal).
Antara muka (kelengkungan permukaan dan kekasaran).
Lokasi kecacatan yang berkaitan dengan kejadian itu rasuk.
keramaian yang ada pada mikrostruktur logam.
pemantulan yang wujud kecacatan, yang bergantung kepada impedans akustik, saiz, bentuk,dan orientasi.
retak dan kecacatan isipadu boleh mencerminkan gelombang ultrasonik agak berbeza. banyak retak adalah "tidak kelihatan" dari satu arah dan reflektor kuat daripada yang lain.
kelemahan pelbagai rupa akan cenderung untuk bunyi berselerak dari transduser.

formula berikut berkaitan beberapa pembolehubah yang mempengaruhi nisbah isyarat-kepada-hingar (s / n ) daripada kecacatan:
Sedang diterjemahkan, sila tunggu..
 
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