he conversion of electrical pulses to mechanical vibrations and the co terjemahan - he conversion of electrical pulses to mechanical vibrations and the co Melayu Bagaimana mengatakan

he conversion of electrical pulses

he conversion of electrical pulses to mechanical vibrations and the conversion of returned mechanical vibrations back into electrical energy is the basis for ultrasonic testing. The active element is the heart of the transducer as it converts the electrical energy to acoustic energy, and vice versa. The active element is basically a piece of polarized material (i.e. some parts of the molecule are positively charged, while other parts of the molecule are negatively charged) with electrodes attached to two of its opposite faces. When an electric field is applied across the material, the polarized molecules will align themselves with the electric field, resulting in induced dipoles within the molecular or crystal structure of the material. This alignment of molecules will cause the material to change dimensions. This phenomenon is known as electrostriction. In addition, a permanently-polarized material such as quartz (SiO2) or barium titanate (BaTiO3) will produce an electric field when the material changes dimensions as a result of an imposed mechanical force. This phenomenon is known as the piezoelectric effect. Additional information on why certain materials produce this effect can be found in the linked presentation material, which was produced by the Valpey Fisher Corporation..
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dia penukaran denyutan elektrik untuk getaran mekanikal dan penukaran kembali getaran mekanikal kembali kepada tenaga elektrik adalah asas untuk ujian ultrasonik. elemen yang aktif adalah jantung transduser kerana ia menukarkan tenaga elektrik kepada tenaga akustik, dan sebaliknya. elemen yang aktif pada asasnya sekeping bahan polarisasi (iaitubeberapa bahagian molekul yang bercas positif, manakala bahagian-bahagian lain molekul bercas negatif) dengan elektrod yang dipasang pada dua wajah yang bertentangan. apabila medan elektrik digunakan di seluruh bahan, molekul polarisasi akan menyelaraskan diri dengan medan elektrik, menyebabkan dipoles disebabkan dalam struktur molekul atau kristal bahan.jajaran ini akan menyebabkan molekul bahan untuk mengubah dimensi. Fenomena ini dikenali sebagai electrostriction. di samping itu, bahan-lamanya polarisasi seperti Quartz (SiO2) atau barium titanat (batio3) akan menghasilkan medan elektrik apabila bahan perubahan dimensi sebagai hasil daripada kuasa mekanikal dikenakan. Fenomena ini dikenali sebagai kesan piezoelektrik.maklumat tambahan mengenai mengapa bahan-bahan tertentu menghasilkan kesan ini boleh didapati dalam bahan persembahan berkaitan, yang dihasilkan oleh syarikat valpey nelayan ..
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