[논문]양서류 번식음 맵핑을 위한 무인비행장치 시스템의 정확성 검증

박민규; 배서현

doi:10.13087/kosert.2022.25.2.85

양서류 번식음 맵핑을 위한 무인비행장치 시스템의 정확성 검증
Accuracy verification for unmanned aerial vehicle system for mapping of amphibians mating call 원문보기

環境復元綠化 = Journal of the Korean Society of Environmental Restoration Technology, v.25 no.2, 2022년, pp.85 - 92

박민규 ((주)디에이치엔이앤씨) , 배서현 ((주)디에이치엔이앤씨)

Abstract ▼ AI-Helper

The amphibian breeding habitat is confirmed by mating call. In some cases, the researcher directly identifies the amphibian individual, but in order to designate the habitat, it is necessary to map the mating call region of the amphibian population. Until now, it has been a popular methodology for researchers to hear mating calls and outline their breeding habitats. To improve this subjective methodology, we developed a technique for mapping mating call regions using Unmanned Aerial Vehicle (UAV). The technology uses a UAV, fitted with a sound recorder to record ground mating calls as it flies over an amphibian habitat. The core technology is to synchronize the recorded sound pressure with the flight log of the UAV and predict the sound pressure in a two-dimensional plane with probability density. For a demonstration study of this technology, artificial mating call was generated by a potable speaker on the ground and recorded by a UAV. Then, the recorded sound data was processed with an algorithm developed by us to map mating calls. As a result of the study, the correlation coefficient between the artificial mating call on the ground and the mating call map measured by the UAV was R=0.77. This correlation coefficient proves that our UAV recording system is sufficiently capable of detecting amphibian mating call regions.

주제어

표/그림 (7)

그림 Figure 1. The processing of this system to map the location of mating call
그림 Figure 2. The mating call(Kaloula borealis) sound spectrum(A) used in the experiment and the potable speaker(B)
그림 Figure 3. Prototype of the mechanical part for detecting mating call
그림 Figure 4. Test area and UAV flight routes
그림 Figure 5. Sound spectrum of the original sound collected using the UAV(A) and spectrum of sound with reduced noise(B).
그림 Figure 6. Relative kernel density(RKD) of the location of mating call and RKD of mating call recorded by UAV. (C) is a spatial correlation between (A) and (B).
그림 Figure 7. It is an example of irregularly recording sounds from the ground with UAV due to an external factor(A: Cross wind, B: Inertia)

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