Rancang Bangun Instrumen Pengukur Tinggi Gelombang Permukaan Laut Menggunakan Sensor Accelerometer
Ocean wave is one of the important parameter that affected the dynamic of the coastal. Ocean monitoring that provides real-time data is needed to help better understand of the ocean. The objective of this study are designing and constructing an instrument to measure the wave height. The instrument is designed by using accelerometer sensor and its placed on a buoy to follow the water particle movement on the sea surface. Electronics systems used ATmega32 microcontroller as the main control of this instruments. Data from the sensors stored on the MMC/SD card. Data analysis used MATLAB software by using zero crossing method to get the wave properties. The instruments measured at one fixed point by mooring system. Instrument had undergone fields test in Wakatobi, Southeast Sulawesi and moored at 8 meters depth. Data analysis in 22 hours recording in location showed that the average wave height ̅ was 0.72 meters; the significant wave height (Hsig) was 1.32 meters and the maximum wave height (Hmax) was 2.58 meters.