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  1. 防災科研関係論文

GPS受信機基板を用いた地震観測用高精度時計の製作

https://nied-repo.bosai.go.jp/records/5848
https://nied-repo.bosai.go.jp/records/5848
cf0743c2-f02d-4082-b6a4-7b90d67e8cdc
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 ja
タイトル GPS受信機基板を用いた地震観測用高精度時計の製作
タイトル
言語 en
タイトル Standard Clock for Seismic Observations Using GPS Receiver Board
言語
言語 jpn
著者 森田 裕一

× 森田 裕一

ja 森田 裕一

en MORITA Yuichi

Search repository
西村 太志

× 西村 太志

ja 西村 太志

en NISHIMURA Takeshi

Search repository
抄録
内容記述タイプ Other
内容記述 Even in the recent years, the accurate timing system is the most important and effective tool for temporally aligned seismic observation. Nowadays, with the advance of the electric and electronic technology, we can purchase small GPS receiver board with very cheap price. Since the GPS receiver boards output precise timing pulse, we complete accurate standard clock for seismic observation using the GPS receiver boards.<br>At first, in order to check the performance of the GPS receiver boards (Magnavox, GPS Engine), we compare the timing pulse from the board and the atomic clock at the Mizusawa Kansoku Center National Astronomical Observatory. We find out that the precision of the timing pulse from the GPS receiver board is usually within 0.1 micro-seconds. The precision reduces up to 3 micro-seconds, when the number of available GPS satellites decreases. Even with worst precision, the timing pulse from the GPS receiver is enough accurate for correcting the clock for seismic observation. Using the GPS receiver board, we produce the standard clock for seismic observation. The 8-bit microcomputer, whose current consumption is very small, controls the GPS receiver board, displays current time and generates time codes. Considering that the GPS receiver consumes much current, the temperature compensated crystal oscillator is usually used for time base and corrected by the GPS receiver at proper time intervals. The accuracy of the standard clock is always within 2msec, and its current consumption is about 35mA. Its weight is about 1kg and its size is small. It is good for the field works.
言語 en
書誌情報 ja : 地震 第2輯
en : Zisin (Journal of the Seismological Society of Japan. 2nd ser.)

巻 46, 号 2, p. 67-74, 発行日 1993
出版者
言語 ja
出版者 公益社団法人 日本地震学会
出版者
言語 en
出版者 SEISMOLOGICAL SOCIETY OF JAPAN
ISSN
収録物識別子タイプ EISSN
収録物識別子 1883-9029
DOI
関連識別子 10.4294/zisin1948.46.2_67
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