Ultrasonic Sensing: Fundamentals and its Applications to Nondestructive Evaluation

Ihara, Ikuo

doi:10.1007/978-3-540-69033-7_14

Cited by 13 publications

(8 citation statements)

References 23 publications

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“…The waveform and the amplitude of an ultrasonic wave are influenced by a number of factors, including ultrasonic beam spreading, energy absorption, dispersion, nonlinearity, transmission at interfaces, scattering by inclusions and defects, Doppler effect, etc. [81]. Attenuation is a fundamental factor to be always kept in mind when designing ultrasonic guided waves systems, especially if they are required to operate on a long range.…”

Section: Discussionmentioning

confidence: 99%

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Rail Diagnostics Based on Ultrasonic Guided Waves: An Overview

Bombarda

Vitetta

Ferrante³

2021

Applied Sciences

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Rail tracks undergo massive stresses that can affect their structural integrity and produce rail breakage. The last phenomenon represents a serious concern for railway management authorities, since it may cause derailments and, consequently, losses of rolling stock material and lives. Therefore, the activities of track maintenance and inspection are of paramount importance. In recent years, the use of various technologies for monitoring rails and the detection of their defects has been investigated; however, despite the important progresses in this field, substantial research efforts are still required to achieve higher scanning speeds and improve the reliability of diagnostic procedures. It is expected that, in the near future, an important role in track maintenance and inspection will be played by the ultrasonic guided wave technology. In this manuscript, its use in rail track monitoring is investigated in detail; moreover, both of the main strategies investigated in the technical literature are taken into consideration. The first strategy consists of the installation of the monitoring instrumentation on board a moving test vehicle that scans the track below while running. The second strategy, instead, is based on distributing the instrumentation throughout the entire rail network, so that continuous monitoring in quasi-real-time can be obtained. In our analysis of the proposed solutions, the prototypes and the employed methods are described.

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Section: Discussionmentioning

confidence: 99%

“…An ultrasound or ultrasonic wave is characterized by a frequency greater than 20 kHz. There are two types of ultrasonic waves [81]: bulk (fundamental) waves and guided waves. Bulk propagation refers to waves propagating without any boundary, like in an infinite medium (or in media…”

Section: Informed Consent Statement: Not Applicablementioning

confidence: 99%

Rail Diagnostics Based on Ultrasonic Guided Waves: An Overview

Bombarda

Vitetta

Ferrante³

2021

Applied Sciences

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“…Dan di dalamnya terdapat heater, yang biasanya memakai daya sekitar 200-300 Watt, sebagai komponen utama pemanas. [6], [7] Kualitas Daya Listrik Peningkatan terhadap kebutuhan dan konsumsi energi listrik yang baik dari segi kualitas dan kuantitas menjadi salah satu alasan mengapa perusahaan utilitas penyedia listrik perlu memberi perhatian terhadap isu kualitas daya listrik. Terlebih pada konsumen perindustrian yang membutuhkan supply listrik yang baik yaitu dari segi kontinuitas dan juga kualitas tegangan yang disupply (karena mesin -mesin pada perindustrian sensitif terhadap lonjakan/ ketidakstabilan tegangan) perlu diusahakan suatu sistem pendistribusian tenaga listrik yang dapat memberikan pelayanan yang memenuhi kriteria yang diinginkan konsumennya.…”

Section: Komponen Dalam Dispenserunclassified

Efisiensi Daya Listrik Pada Dispenser Dengan Jenis Merk Yang Berbeda Menggunakan Inverator

Harahap

Adam

2021

RESISTOR

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Dispenser adalah salah satu alat rumah tangga yang menggunakan listrik untuk dapat memanaskan elemen pemanas dan menjalankan mesin pendinginnya. Dispenser ada yang menggunakan prinsip kerja dengan elemen pemanas dan mesin pendingin (compressor). Dispenser atau tempat air minum adalah salah satu peralatan listrik atau elektronik yang didalamnya terdapat heater sebagai komponen utamanya, heater berfungsi untuk memanaskan air yang ada pada tabung penampung, heater umunya memiliki daya sekitar 200-300 Watt. Penggunaan Inverator telah beredar di pasaran dan digunakan oleh setiap rumah tangga, bisnis, industri maupun perkantoran di Indonesia. Berdasarkan perbandingan efisiensi daya dan daya penggunaan listrik sebelum dan sesudah menggunakan inventor pada rumah tangga dan memiliki selisih antara Sebelum Pemakain Inventor daya aktif pada merek A sebesar 532 Watt, pada merek sebesar B 563 Watt, pada merek C sebesar 329 Watt dan Sesudah Pemakain Inventor daya aktif pada merek A sebesar 517 Watt, pada merek sebesar B 560 Watt, pada merek C sebesar 548 Watt. The dispenser is a household appliance that uses electricity to heat the heating element and run the cooling machine. There are dispensers that use a working principle with a heating element and a cooling machine (compressor). The dispenser or drinking water container is one of the electrical or electronic equipment in which there is a heater as its main component, the heater functions to heat the water in the storage tube, the heater generally has a power of around 200-300 Watts. The use of Inverator has been circulating in the market and is used by every household, business, industry and office in Indonesia. Based on the comparison of power efficiency and power use of electricity before and after using the inventor in the household and the difference between Before Use Inventor, active power in brand A is 532 Watts, for brands B 563 Watts, on brand C is 329 Watts and After Use Inventor power is active in brand A of 517 Watts, in brands of B 560 Watts, in brand C of 548 Watts.

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“…Same sensor is used for transmitter and receiver.in some application it is used to calculate distance of the object. Ultrasonic sensors is applicable in many areas, for example in private housing, health care, defence system [1,9], traffic, industry and engineering and science [10] 3. PROPOSED SYSTEM Here we are making an ultrasonic based Radar model.…”

Section: Background and Related Workmentioning

confidence: 99%