The Bremen ocean bottom tiltmeter (OBT) – a technical article on a new instrument to monitor deep sea floor deformation and seismicity level
The Bremen ocean bottom tiltmeter (OBT) – a technical article on a new instrument to monitor deep sea floor deformation and seismicity level
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DOI：
10.1007/s11001-006-9011-4
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发表时间：
2007-02
期刊：
影响因子：
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通讯作者：
M. Fabian;H. Villinger
中科院分区：
文献类型：
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作者：
M. Fabian;H. Villinger
不莱梅海底倾斜仪是一种新型的6000 m深海海底倾斜自主观测仪器，信号周期大于7.5 s。该仪器还记录频率范围从DC到1 Hz的垂直加速度。倾斜仪由Applied Geomechanics Inc. 756广角双轴磁泡倾斜传感器，分辨率为1.0μ rad（0.2弧秒）。使用具有约10− 5 m/s2分辨率的Servo K-Beam 8330A2.5型Kistler Corp. MEMS加速度计进行加速度测量。海洋嵌入式系统AD 24 24位Sigma-Delta转换器，由低功耗Persistor Inc. CF 2型嵌入式计算机系统，数据采集。倾斜仪的工作时间超过一年，这取决于电池寿命。在我们的设计中，倾斜仪不需要主动调平装置，即，伺服电机或其他移动部件来调整传感器或框架。我们设计的仪器通过远程操作车辆进行部署。自2005年5月以来，不莱梅洋底倾斜仪记录了大西洋中脊洛加切夫热液喷口区的海底变形和地震活动水平。该倾斜仪是德国研究计划“Schwerpunktprogramm 1144：Vom Mantel zum Ozean”的“Logatchev长期环境监测”项目（称为LOLEM）监测系统的一部分。
The Bremen ocean bottom tiltmeter is a new 6000 m-depth deep sea instrument for autonomous observation of sea floor tilt with signal periods longer than 7.5 s. The instrument also records vertical acceleration in the frequency range from DC to 1 Hz. The tiltmeter has an Applied Geomechanics Inc. 756 wide angle biaxial bubble tilt sensor with a resolution of 1.0μ rad (0.2 arc second). A Kistler Corp. MEMS accelerometer of type Servo K-Beam 8330A2.5 with about 10−5m/s2resolution is used for the acceleration measurements. An Oceanographic Embedded Systems AD24 24 bit Sigma-Delta converter, which is controlled by a low-power Persistor Inc. embedded computer system of type CF 2, samples the data. The duration of tiltmeter operation is more than one year, which is controlled by the battery life. In our design the tiltmeter does not need active leveling devices, i.e., servo motors or other moving components to adjust sensors or frame. We designed the instrument for deployments by means of a remote operated vehicle. Since May 2005 the Bremen ocean bottom tiltmeter has recorded sea floor deformation and seismicity level in the Logatchev hydrothermal vent field, Mid-Atlantic Ridge. The tiltmeter is a part of the monitoring system of project ‘Logatchev Long-Term Environmental Monitoring,’ called LOLEM, of the German research program with the name ‘Schwerpunktprogramm 1144: Vom Mantel zum Ozean.’