특허의 토픽 진화분석을 통한 에너지 하베스팅 기술 발전 경로 추적
Tracing Technological Development Pathways through a Topic Evolution Analysis ― A Case Study of Energy Harvesting
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초록
에너지 하베스팅 기술은 주변에 소실되는 에너지를 사용 가능한 전력 형태로 변환하는 친환경적인 에너지 생산 방식으로, 환경적·기술적 필요성아래에 많은 관심을 받고 있다. 반면, 에너지 하베스팅 기술의 발전 흐름이나 동향에 대한 계량적 분석 연구는 적은 관심을 받고 있므며, 소수의 선행연구들은 특정 기술에너지원, 변환방식 관점에서의 제한적인 기술 동향을다루었다. 본 연구는 전체적인 에너지 하베스팅 기술에 관련된 대량의 특허데이터를 기반으로, 전반적인 에너지 하베스팅 기술의 발전 동향을 분석한다. 본 연구는 특허 정보 기반의 토픽 진화분석을 통해, 시간에 따라 발전하는 에너지 하베스팅 기술을 계량적으로 분석한다. 구체적으로, 본 연구는 에너지 하베스팅 기술 특허에 토픽 모델링 기법을 적용하여 세부 기술요소를정의한다. 다음으로, 기술요소 간 연계성 및 부상 시점을 특허 정보를 기반으로 계량화하고, 기술 진화 맵을 생성한다. 에너지 하베스팅 기술의 기술진화 맵은 다양한 세부 기술요소들이 시간에 따라 등장하고 상호작용하며발전하는 양상을 보여 준다. 분석결과를 통해, 에너지 하베스팅 기술이 초기에는 주변 에너지나 효율적인 변환방식에 관한 기술적 연구가 진행되었고, 최근에는 에너지 하베스팅 기술을 다른 분야에 활용하기 위한 응용 연구가진행된 것을 확인하였다. 본 연구의 분석결과를 통해, 에너지 하베스팅 연구자들과 정책 입안자들은 에너지 하베스팅 기술 발전 동향을 이해하고, 최근발전 양상까지 모니터링할 수 있을 것으로 기대된다.
Abstract
Energy Harvesting technology, which converts ambient energy present in the environment into usable power forms, has received steady attention under environmental and technical necessity. Few existing prior studies have focused on specific technical energy support or conversion methods, dealing with limited technical trends. This study analyzes the overall development trend based on a large amount of patent data. This study quantitatively addresses the development pathways over time through a patent information-based topic evolution analysis. This study defines detailed technical elements by applying topical modeling to the text of collected patents. Next, the connection between technology elements is quantified using inventor, citation, and classification information. The emerging time points of each technology element are defined based on forward citation information, and a technology evolution map is generated. The technology evolution map shows that various detailed technical elements emerge, interact, and develop over time. The analysis results showed that technologies on ambient energy and efficient conversion method were active in the beginning, and application technologies in other areas were recently conducted. Through the analysis results, it is expected that researchers and policy makers in related academia understand the trends in Energy Harvesting technology and monitor the latest development trends.
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