Pembangkitan Pulsa Orde Nanodetik Berbasis Mikrokontroler Untuk Eksitasi Transduser Ultrasonik

FAATIH RIFQI MUQAFFI, BAMBANG MUKTI WIBAWA, DARMAWAN HIDAYAT

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ABSTRAK

Makalah ini melaporkan suatu teknik pembangkitan pulsa lebar orde nanodetik (ns) repetitif yang terprogram berbasis mikrokontroler untuk keperluan eksitasi transduser ultrasonik. Pembangkitan pulsa dan pengaturan jarak antar pulsa dilakukan melalui operasi timer mikrokontroler. Sebuah monostable multivibrator mengubah lebar pulsa dari mikrokontroler dalam orde nanodetik melalui pengaturan komponen pewaktuan resistor-kapasitor (RC) dengan cara pengaturan nilai R yang dibuat dari sebuah potensiometer digital. Hasil pengujian menunjukkan bahwa mikrokontroler membangkitkan pulsa repetitif dengan interval terprogram dalam orde 1 detik dan lebar pulsa minimum 1,25 ms. monostable multivibrator dapat mengubah lebar pulsa tersebut menjadi sekitar 140 ns. Berdasarkan hasil pengujian, dapat disimpulkan bahwa sistem berfungsi sesuai rancangan, sistem dapat membangkitkan pulsa repetitif dengan lebar pulsa hingga 140 ns dengan parameter interval dan lebar yang dapat diprogram.

Kata kunci: generator pulsa, lebar pulsa singkat, mikrokontroler, monostable multivibrator, eksitasi transduser ultrasonik

 

ABSTRACT

This paper reports a repetitive, programmable, microcontroller-based pulse width generation technique for the purpose of ultrasonic transducer excitation. Pulse generation and distance adjustment between pulses is done through the microcontroller timer. A monostable multivibrator changes the pulse width of the microcontroller in the order of nanoseconds by adjusting the resistor-capacitor time constant which are done by adjusting the R value made from a digital potentiometer. The test results show that the microcontroller generates repetitive pulses with programmed intervals in order of 1 second and pulse width of 1.25 ms. A monostable multivibrator converts the pulse width to ca. 140 ns. Based on the test results, it can be concluded that the system functions according to the design as the system can generate repetitive pulses with pulse widths up to 140 nanoseconds with programmable interval and width parameters.

Keywords: pulse generator, short-width pulse, microcontroller, monostable multivibrator, ultrasonic transducer excitation


Kata Kunci


generator pulsa; lebar pulsa singkat; mikrokontroler; monostable multivibrator; eksitasi transduser ultrasonik.

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Referensi


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DOI: https://doi.org/10.26760/elkomika.v8i1.229

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