LTC2400모듈을 이용한 소형 임베디드 보드의 ADC 안정화에 관한 연구

Abstract

Demands for applications using sensor information have been increasing due to development Internet of Things technology, and necessity for setting sensors onto atmosphere, soil, ocean, forest and our living environment and organically collecting information also has been increasing. Data collected by sensors should be reliable to be used as a real data. Current researches usually focused on miniaturization of embedded device and increment of low voltage ADC. There has been little research about improving reliability of transformed data. In real field small embedded boards have a problem that sensor input data is not balanced during network connection or overloading motion. Battery voltages of 3V were measured through 2 ways and compared each other. As a result of the voltage measurement using Arduino’s ADC, accurate voltage measurement was possible only when maintains at 5V. We also used WiFi to observe how much is the network load effect in small scale embedded board. Voltages were measured at the stage of connection and disconnection and we found voltage is not stable network and several loading condition. When voltage of 3V battery was measured using LTC2400 ADC module with regulator, we could observe exact battery voltage when applied was 4.096V or more which is input range of regulator. This paper proposed and confirmed a method in which regulator was used for accurate data collection of sensors. This method can make voltage in ADC stable, which would be a basic technology for the stabilization of data collection by sensors.