• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Ultragarsinės sistemos projektavimas / Ultrasound System Design

Ivanauskas, Gabrielius 02 July 2012 (has links)
Parengtas bakalauro baigiamasis darbas yra susijęs su galios elektronikos įrangos kūrimu. Darbas yra parengtas taip, kad jo atskiras dalis būtų galima naudotis besimokant galios elektronikos dalyką. Studentai atskiras dalis gali studijuoti kaip papildomą teorinę medžiagą, matydami jos praktinį išpildymą. Tuo tikslu darbe yra aprašomi atskiri elektronikos sistemos komponentai (schemos, loginiai elementai ir kiti puslaidininkiai prietaisai). Ultragarsinė sistema - tai puiki priemonė nuo šunų. Atliekant elektrinius montavimo darbus lauko sąlygomis, tikrinant elektros komponentus gyvenamuosiuose būstuose ar mėgstantiems pabėgioti miškeliuose, kuriuose gausu nepririštų šunų, ši sistema tikrai veiksminga. Sistema kompaktiška, telpa kišenėje ar prisisegant prie diržo. Veikimo principas - paspaudus mygtuką skleidžiamas ultragarsas, kurio negirdi žmogus, bet kuris labai nepatinka šunims. Pakanka nukreipti į gyvūną ir jis nubėga lyg įgeltas. Veiksmingiausiais 4-5 metrų atstumu. Nauja mokomoji įranga brangiai kainuoja, todėl siekiama sukurti ir išbandyti sistemą mokymo tikslams, kuri būtų suderinta su galios elektronikos dalyko mokymo programa. Darbe aprašomi schemos komponentai ir parametrų parinkimas, siekiant juos tarpusavyje suderinti ir užtikrinti jų tinkamą veikimą. / There are many different situations in which ultrasonic devices can be used by different people in different situations. People who might benefit from having an ultrasonic system in particular are: • Field service electrical engineers. • Inspectors of electrical installations. • People with an excessive fear of dogs. • Joggers. • Bicyclists. • Dog trainers. The system produces a high frequency sound only audible to dogs but not to humans, so using the device will not bother other people. The ultrasonic device will stop unwanted dogs from approaching you at approximately up to 15 feet, helping you to stop a fierce looking dog from getting close to you. The electronic device can be used not just to keep dogs away but also to train them. Post men who sometimes have to deal with dogs in and around homes. This type of device was originally used when training dogs but as the technology developed, it could also be used to scare dogs off if needed. When the device sounds the high frequency tone it will keeps dogs away at a distance of up to 15 feet. The ultrasonic system must never be used for any longer than absolutely necessary and should only be used for a second. The high tones are uncomfortable to an animal and as the idea is to chase the dog away, only short tones are effective. During the development of the thesis, the above mentioned ultrasonic system has been produced. Its appropriate operation was tested using an oscillograph (the signals of the electrical generation chain... [to full text]

Page generated in 0.0847 seconds