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Dalam penelitian ini dikembangkan sebuah sistem akusisi data untuk survei panas bumi. Untuk menghasilkan sistem instrumentasi yang mampu mengukur dan memonitor distribusi suhu bawah permukaan diperlukan sistem akusisi data yang murah dan efesien. Sistem dibangun berbasis jaringan sistem terdistribusi dengan topologi field-bus, menggunakan arsitektur single-master multi-slave. Master merupakan unit pengendali, dibangun berbasiskan sebuah PC yang dilengkapi dengan antarmuka RS-485. Slave merupakan unit sensing, tiap-tiap unit slave dibangun dengan mengintegrasikan sistem array sensor LM35 dengan sistem akuisisi data berbasis mikrokontroler menggunakan AVR ATmega8. Pengolahan data dari hasil pengukuran suhu ini menggunakan satu set komputer dengan perangkat lunak microsoft excel 2010 untuk menghasilkan grafik pada titik pengukuran. Hasil implementasi dari monitoring suhu ini akan mengambarkan distribusi suhu bawah permukaan tanah. A data acquisition system for geothermal survey was developed in this research. Cheap and efficient data acquisition system was required to produce the instrumentation system which was capable to measure and monitor the distribution of subsurface temperature. The system consists of field-bus topology, using single-master multi-slave architecture. Master is a control unit built based on a PC equipped with RS-485 interface. Slave is a sensing unit; each slave is built by integrating array sensor LM35 within AVR ATmega8a microcontroller-based data acquisition system. Measurement techniques included sounding and mapping system by placing four slaves planted in the depth of 2.5 m. Processing of data obtained from temperature measurements was performed using Microsoft Excel 2010 to produce graphics at point of measurement. The results of temperature monitoring will described the distribution of subsurface temperature.

Pengembangan Array sensor Suhu dan Sistem Akusisi Data Berbasis Mikrokontroler untuk Pengukuran Suhu Bawah Permukaan