Rotational sensors-a comparison of different sensor types
Rotational sensors-a comparison of different sensor types
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DOI：
10.1007/s10950-012-9286-7
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发表时间：
2012-10-01
影响因子：
1.6
通讯作者：
Igel, Heiner
中科院分区：
文献类型：
--
作者：
Bernauer, Felix;Wassermann, Joachim;Igel, Heiner
我们对两种类型的旋转运动传感器进行了实验室测试，即 Eentec 制造的 R1 型和 R2 型液基旋转地震仪以及 Northrop Grumman LITEF 制造的闭环光纤陀螺仪 LCG-Demonstrator。所有仪器均在不同温度下进行了绝对校准，对自噪声进行了表征和量化，并与德国韦策尔大地测量站的环形激光陀螺仪G进行了比较。 R1 的发电机常数在标称工作温度范围内变化高达 27%。在闭环系统 LCG-Demonstrator 中，对温度变化的补偿效果非常好，并且发电机常数可以视为误差条内的常数。对于这两种仪器类型，我们在 10 至 100 秒的周期范围内测量了 10（-千分之一欧元 7）rad/s 的灵敏度。虽然这种灵敏度对于土木工程应用来说已经足够了，但对于弱动地震学应用来说，它必须提高至少 1 个数量级。
We present laboratory tests for two types of rotational motion sensors, the liquid-based rotational seismometers type R1 and type R2 manufactured by Eentec and the closed loop fiber optic gyroscope LCG-Demonstrator by Northrop Grumman LITEF. All instruments were calibrated absolutely at different temperatures, characterization and quantification of self-noise was carried out, and a comparison with the ring laser gyroscope G from the Geodetic Observatory in Wettzell, Germany is drawn. The generator constant of the R1 varies up to 27% in the nominal operating temperature range. In the closed-loop system LCG-Demonstrator, the compensation for temperature variation works very well, and the generator constant can be seen as constant within the error bars. For both instrument types, we measured sensitivities in the order of 10 (-aEuro parts per thousand 7) rad/s in a period range from 10 to 100 s. While this sensitivity is already sufficient for civil engineering applications, it has to be improved by at least 1 order of magnitude for applications in weak motion seismology.