RANCANG BANGUN SISTEM TELEMETRI PENGUKURAN LEVEL PERMUKAAN AIR MENGGUNAKAN GELOMBANG ULTRASONIK

Abstract

Multistation telemetry monitoring system of height water surface level using ultrasonic as censor and AT89S51 as data processor has been made. Data delivery based on principle of Frequency Shift Keying (FSK), can be used on several needs such as height water surface level monitoring on river, tsunami early warning system and others. The ware use ultrasonic oscillator, microcontroller, distance chopper microcontroller, FSK modem with XR-2206 and XR-2211 and also Frequency Modulation (FM) wave transmitter. Long distance monitoring can be done by microcontroller. At monitoring station using ultrasonic censor, the result from measurment displayed into LCD, then that displayed data sent to microcontroller serially and modulatated with FSK, and transmitted use FM transmitter. Transmitted signal from FM, catched by FM receiver at main station and demodulated with FSK into digital data. Next, data will be displayed in computer. The result of this research from measurement from two station. The result shows that height of object measurement equal on computer