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Peng C.,China Earthquake Administration | Yang J.,China Earthquake Administration | Xue B.,China Earthquake Administration | Chen Y.,China Earthquake Administration | And 3 more authors.
Acta Seismologica Sinica | Year: 2014

Combination of mobile and fixed network observations is one development tendency of current seismic observation system. In order to solve the problems such as mutual independence between seismometers and seismic data acquisition instruments, inconvenient portability and high power consumption in mobile observation, this study develops a new low-power broadband sensor-integrated data logger, which contains a three-component seismometer, a data acquisition unit, a recording device and services. The instrument has a wide frequency bandwidth (60 s-80 Hz), high dynamic range (>140 dB) and low-power consumption (0.6 W), and is easy to carry. Whole weight of the instrument is about 15 kg, including the power supply system, GPS antenna and crates. This paper describes its apparant structure, hardware structure, low-power processing techniques, sensitivity correction, standard orientation and the orthogonal correction technique in detail. We have rigorously tested the main performance parameters of the instrument and given the specific test results. After the development of instrument was completed, we put it into mobile observation after the 2010 Yushu MS7.1 earthquake. The test results show that this instrument can meet the requirements of mobile observation.

Li J.,China Earthquake Administration | Zhuang C.,China Earthquake Administration | Xue B.,China Earthquake Administration | Zhu X.,China Earthquake Administration | And 9 more authors.
Acta Seismologica Sinica | Year: 2010

In order to comprehensively improve marine seismic study and monitoring capability, ocean bottom seismograph (OBS) was developed. This paper describes the basic working principle of OBS, proposes its performance specifications. The overall design, composition and structure principle of the various components of developed broadband OBS are described in detail. This paper also introduces application example in the South China Sea, and shows the seismic waveforms from earthquakes recorded by the broadband OBS on the sea floor at 3000 m depth.

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