Implementasi Zigbee Transceiver Untuk Akuisisi Data Sensor Inersia Pada Wireless Body Area Network (WBAN)
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Abstract
Laju pertambahan jumlah penduduk yang membutuhkan layanan kesehatan di Indonesia tidak berbanding lurus dengan penambahan jumlah fasilitas kesehatan yang ada. Salah satu solusi alternatif yang dapat digunakan untuk mengatasi masalah tersebut adalah dengan mengembangkan teknologi Wireless Body Area Network (WBAN) sebagai alat bantu layanan kesehatan. WBAN adalah suatu sistem terpadu yang terdiri atas sekelompok modul sensor yang terdistribusi dan terhubung secara nirkabel pada suatu topologi jaringan tertentu dan berfungsi untuk mengekstrak dan berbagi informasi untuk diolah sesuai bidang aplikasinya. Salah satu aplikasi WBAN adalah untuk analisis gait atau metode untuk mempelajari pola berjalan manusia. Untuk melakukan proses analisis gait secara optimal dibutuhkan instrumen sensor inersia yang terpasang pada tubuh pasien yang merekam data gait dari pasien. Data dari pasien lalu dikirimkan melalui protokol komunikasi nirkabel ZigBee ke network coordinator yang berfungsi sebagai pengumpul data. Jaringan memiliki topologi dalam bentuk star dengan data rate dari sensor sebesar 50 Hz. Data dari network coordinator kemudian dibaca pada PC yang telah dilengkapi perangkat lunak pengolah data untuk diolah lebih lanjut. Sistem diuji pada ruangan koridor sejauh 4 meter dengan nilai RSSI atau kuat sinyal bernilai paling kecil sebesar -64 dBm. Dalam hal konsumsi daya, sensor node dapat digunakan secara berkelanjutan dalam jangka waktu 2 jam 25 menit
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