LoRa, Sensor Node, Cloud Platform을 활용한 계측관리에 관한 연구

Measurement Management System Using LoRa, Sensor Node, and Cloud Platform

최근 4차 산업혁명으로 통신분야와 센서분야는 눈부시게 발전하고 있다. 그 중 LoRa LPWAN은 저전력 IoT 전용기술로기존의 LTE 망보다 저렴하며, 근거리 통신방식(Bluetooth/WiFi/Zigbee)보다 넓은 커버리지를 제공하는 통신기술이다. 이번연구에서 LoRa LPWAN 통신을 활용한 계측관리 시스템을 제안하였다. 지상구간과 지하구간에 각각 공용망(Public), 자가망(Private)을 활용한 하이브리드 계측시스템으로 구축하였다. 각 메카니즘에 맞는 센서를 선정하여 고유신호를 처리할 수 있는센서노드를 개발하였으며, 원시 데이터를 Cloud Platform에 저장할 수 있는 통합 모니터링 프로그램을 개발하였다. 연구결과 통신 성공률은 1차 송수신시 90%, 2차 송수신시 99%로 나타났으며, 센서에서의 측정치와 센서노드 연결 후 통신 완료시측정치가 정확히 일치하는 것으로 확인되었다.

With the recent Fourth Industrial Revolution, communication and sensor fields are developing remarkably. Among them, LoRa low-power wide-area network (LPWAN) uses low-power Internet-of-things-only technology, which is cheaper than the existing long-term evolution network, and it is a communication technology that provides wider coverage than short-range communication methods (such as Bluetooth, WiFi, and Zigbee). In this study, a measurement management system was developed using LoRa LPWAN communication. It was constructed as a hybrid measurement system using public and private networks for the ground and underground sections, respectively. We developed a sensor node that could process unique signals by selecting sensors suitable for each mechanism and an integrated monitoring program that could store raw data in the Cloud Platform. The results showed that the communication success rate was 90% for the first transmission and reception and 99% for the second transmission and reception. It was confirmed that the measured values at the sensor and when communication was completed after connecting the sensor node were equal.