A low cost - high accuracy multisensor array for bat localization

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Details zur Publikation

Autor(en): Hochradel K, Dorsch P, Häcker T, Hohler T, Sutor A, Lerch R
Jahr der Veröffentlichung: 2016
Sprache: Englisch


Abstract


Many behavioral studies demand knowledge of the distribution or location of bats in space. Our research group investigated the behavior of bats in close proximity to the nacelle of wind turbines. Therefore, we measured the distribution of bats with help of stereo infrared cameras. Systems able to provide this information are expensive, complicated and require a specialist in the field for assembly and data acquisition. Our aim was to design an inexpensive and easy to use system to localize bats that, in addition, allows long recording periods. In order to gain maximum information the localization system contains different sensor technologies. On one hand, it includes active infrared-stereo-cameras to localize bats optically and on the other hand each ultrasonic bat call can be recorded and localized by multilateration with multiple novel ultrasonic microphones. We developed a calibration procedure to align the optical and the acoustical system.



The developed setup with its dimension of 1x1m is tripod mountable and the costs sum up to 5000 EUR with the goal to decrease costs to 2000 EUR. To achieve this, we programmed a FPGA to record the ultrasonic bat signals to be independent of proprietary hardware. Furthermore, we implemented a novel detection algorithm for ultrasonic bat calls which allows to run different detection techniques simultaneously in real-time. This algorithm was optimized for the FPGA and provides precise distinction between bat calls and noise to reduce post processing efforts and disk space. Both systems offer an accuracy of ±20 cm within a radius of 20 m. Since the optical and the acoustical system are calibrated, their results can be combined to improve not only accuracy but also reliability.



FAU-Autoren / FAU-Herausgeber

Dorsch, Philipp
Lehrstuhl für Sensorik
Häcker, Timm
Lehrstuhl für Sensorik
Hochradel, Klaus
Lehrstuhl für Sensorik
Hohler, Tino
Lehrstuhl für Sensorik
Lerch, Reinhard Prof. Dr.-Ing.
Lehrstuhl für Sensorik
Sutor, Alexander Dr.-Ing.
Lehrstuhl für Sensorik


Zitierweisen

APA:
Hochradel, K., Dorsch, P., Häcker, T., Hohler, T., Sutor, A., & Lerch, R. (2016). A low cost - high accuracy multisensor array for bat localization. Durban, ZA.

MLA:
Hochradel, Klaus, et al. "A low cost - high accuracy multisensor array for bat localization." Proceedings of the International Bat Research Conference, Durban 2016.

BibTeX: 

Zuletzt aktualisiert 2018-08-08 um 05:57