ハイドロホン付光磁気ディスク型海底地震計 (MOOBS/H-1) の開発
ハイドロホン付光磁気ディスク型海底地震計 (MOOBS/H-1) の開発
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磁光盘式海底地震仪水听器研制（MOOBS/H-1）
DOI：
10.3135/jmasj.22.253
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
浩 片尾
中科院分区：
文献类型：
--
作者：
順三 笠原;忠泰 松原;利典 佐藤;定之 是澤;浩 片尾
我们研制了一种新型的数字海底地震仪--MOOBS/H（Magneto-Optical Ocean Bottom Seismometer with Hydrophone）-1。该单元旨在配备大容量数据存储，更高的数据准确性和随机访问能力，并提高数据存储的可靠性，这些功能是第一代所没有实现的。通过使用从CPU、SCSI接口和MO单元的电源开-关控制，与完全使用相比，总功率降低到1/100。MOOBS/H-1由地震传感器、放大器、多路转换器、16位A/D转换器、看门狗处理器、计时器、数据传输处理器和5英寸磁光盘存储器组成，可存储2000-3000次地震。使用两个8位CPU：一个用于看门狗，另一个用于主存储器和MO单元之间的数据I/O。采用16位A/D器件。可在8个通道中选择录制通道。8个通道中有6个通道有放大器。A/D的采样率可在1 ~ 800 Hz的各种频率范围内选择。记录模式可在连续、时间窗、逻辑触发和幅度触发模式等几种模式中选择。每个观察所需的参数都是通过总线连接器使用外部键盘单元设置的。设置参数后，键盘单元可拆卸，最大数据存储量为320 Mb。地震事件的最大数量是c.a. 2，如果使用100 Hz采样、4个通道和3分钟记录长度，则为200。在这种情况下，每个事件的最大记录长度可以扩展到42分钟以上。当使用锂电池时，记录寿命约为2个月。MO磁盘中的数据可直接由NEC-PC读取，并可从PC传输到工作站进行分析。还开发了使用MOOBS/H数据的软件。MOOBS/H的有用性得到了日本海沟、日本近海的冲绳海槽、马里亚纳海槽和中大西洋海脊TAG地区等深海观测的证实。利用水听器、放大器和记录装置的频率特性，首次观测到热液喷口的甚低频行为。
We developed a new digital ocean bottom seismometer with a hydrophone using a magneto optical storage device, called MOOBS/H (Magneto-Optical Ocean Bottom Seismometer with Hydrophone) -1. This unit is designed to intend equipping a large-amount data storage, higher accuracy for the data and the random access capability, and improving the reliability of data storage; those features were not realized by the first generation. By the use of the power on-off control of the slave CPU, the SCSI interface, and the MO unit, the total power is reduced to 1/100 compared to the full use. By the MOOBS/H-1, 2000-3000 earthquakes can be stored in an MO disk.The MOOBS/H-1 is composed of seismic sensors, amplifiers, a multiplexer, a 16-bit A/D, a watch-dog processor, a time-keeper, a data-transfer processor and a five inch MO storage. Two 8 bit CPUs are used : one for a watch-dog and the other for data I/O between the main memory and the MO unit. One 16-bit A/D device is used. Recording channels can be selected among 8 channels. Six channels out of 8 channels have amplifiers. The sampling rate of A/D can be selected among various frequencies from 1 to 800Hz. The recording mode is chosen among several modes such as continuous, time window, logical trigger, and amplitude trigger modes. The necessary parameters for each observation are set using external key-pad unit through a bus-connector. The key-pad unit can be removed after setting parameters.The maximum amount of the data storage is 320Mb. The maximum number of earthquake events are c.a. 2, 200 if 100Hz sampling, 4 channels and 3 minutes record length are used. In this case, the maximum record length for each event can be extendible up to more than 42 minutes. When lithium batteries are used, the recording life is roughly 2 months.The data in the MO disk are directly readable by an NEC-PC and can be transferred from the PC to a workstation for analysis. Software to use the MOOBS/H data was also developed.The usefulness of MOOBS/H was confirmed by a number of deep-sea observations in such as the Japan Trench, the Okinawa Trough, off Japan, the Mariana Trough and the TAG area of the Mid-Atlantic Ridge. Using frequency characteristics of hydrophone, amplifier and recording unit, the very low frequency behavior of hydrothermal vent was firstly observed.