海鳥の繁殖観察のための体重計

抄録

In the studies of seabird ecology during the breeding season, a baby bird was captured many times to measure the body weight. This not only affected the breeding, but also made it difficult to accurately measure the weight change of the baby bird. Here, we propose a scale for long-term and sequential measurement of the seabird weight in the nest. The scale consists of spring structures and a non-contact displacement sensor. Since the spring structures and the sensor element are separated, the specifications of the scale can be easily changed by adjusting the spring structures. The sensor element is an eddy current displacement sensor, which has environmental resistance and can be used in harsh natural environments. The experiment to evaluate the specifications of the scale showed that the force range was 2 kg and the resolution was 4.2 g.