![]() ![]() A characteristic feature of the converters is producing distorted earth fault currents, which contain a wide spectrum of harmonics, including high-order harmonics. Such equipment is used both in industrial and domestic installations. In many applications, modern current-using equipment utilizes power electronic converters to control the consumed power and to adjust the motor speed. A field test and analysis procedure for evaluating high-speed rail slab systems are proposed. As a result, the technique does not require an experimental baseline for the crack assessment. The index was based on the difference of the experimental peak amplitude and frequency of the ones calculated from previously developed formulas for plates without substrates. The peak amplitudes in the normalized amplitude spectrum and the peak frequency in the traditional amplitude spectrum for the top concrete overlay were used to develop simple indicators for identifying the integrity of the CA mortar layer. The normalized IE are the simulated transfer function of the original IE response. Both traditional IE and normalized IE are used for data interpolation. In present study, the IE method is chosen to assess defects in the CA mortar layer. Impact–echo tests (IE) were performed above the flawed and flawless locations. In this study, a test specimen simulating the structure of high-speed rail track slabs was embedded with delaminated cracks in various lateral sizes inside the CA mortar layer. The severe deterioration of a cement asphalt (CA) mortar layer may lead to the movement of the upper concrete slab and impair the safety of the speedy train. Authors may use MDPI'sĮnglish editing service prior to publication or during author revisions. Submitted papers should be well formatted and use good English. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Please visit the Instructions for Authors page before submitting a manuscript. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. All manuscripts are thoroughly refereed through a single-blind peer-review process. Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website. Research articles, review articles as well as short communications are invited. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. All submissions that pass pre-check are peer-reviewed. Manuscripts can be submitted until the deadline. ![]() Once you are registered, click here to go to the submission form. Manuscripts should be submitted online at by registering and logging in to this website. Although the emphasis is on practical applications, we also welcome fundamental studies. The purpose of the Special Issue is to collect original research papers or review articles. Strategies and algorithms for fault detection.Acoustic emission and vibration sensors.The Special Issue includes, but is not limited to, the following applications: The Special Issue “Sensors for Fault Diagnosis” aims to summarize the state of the art of the research technology and application on any kind of sensor for diagnostics purposes. We are also witnessing a transformation of the sensor concept, no longer as a separate object added to a machine or to an already existing product, but as an element integrated into the product itself as, for example, fibre optic sensors embedded in composite materials. The increase in the number of sensors has led to decentralized monitoring systems, where the sensors are able to process the signal and transmit an indicator of the malfunction to the plant's central control unit via a wireless mode. The increase in sensors took place in parallel with the miniaturization of the sensors and with the availability of electronic systems with an ever-increasing computing capacity capable of processing the amount of information coming from the sensors, as occurs in modern appliances, where the status or the diagnosis of any malfunction can be performed using a mobile phone. In recent years, there has been a trend reversal, with an increase in the number of on-board sensors used to monitor the status of machines and to diagnose their faults or malfunctions. ![]() Until the last century, civil and industrial fault diagnostics were often implemented using standard inspection tools, techniques, and sensors that were installed and used only after the failure, for example, in non-destructive tests using ultrasound transducers or accelerometers. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |