| 摘要 |
Provided is a rotational speed detection device for a top, said device preventing the occurrence of erroneous detection as much as possible. This rotational speed detection device (information logger device 100), which is fixedly or detachably mounted to a launcher 200, said launcher 200 applying a rotational force to a mounted top 300 and launching said top, and detects the rotational speed of the top 300, is characterized by being provided with a mounting/dismounting detection unit 130 that detects mounting/dismounting of the top, said mounting/dismounting detection unit 130 confirming mounting of the top 300 and detecting the rotational speed of the top 300. |
