| Автор | M J Usher |
| Автор | I W Buckner |
| Автор | R F Burch |
| Дата выпуска | 1977-12-01 |
| dc.description | A miniature, wideband, horizontal-component feedback seismometer has been developed and compared with conventional seismometers. The instrument employs an inverted pendulum of mass 0.04 kg supported with a natural period of 0.6 s and a Q factor of about 20. Displacements of the mass are sensed by a differential capacitive transducer and feedback is applied via an electromagnetic system to maintain the mass stationary with respect to its supports. The instrument has a response defined by feedback from DC to 100 Hz and has a Brownian noise level of 5*10<sup>-10</sup> m s<sup>-2</sup>. Overall dimensions, including an evacuated jacket, are 15 cm*10 cm diameter making it suitable for borehole applications. The instrument has been operated for several weeks with conventional long-period seismometers and has been found to compare satisfactorily. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | A miniature wideband horizontal-component feedback seismometer |
| Тип | paper |
| DOI | 10.1088/0022-3735/10/12/020 |
| Print ISSN | 0022-3735 |
| Журнал | Journal of Physics E: Scientific Instruments |
| Том | 10 |
| Первая страница | 1253 |
| Последняя страница | 1260 |
| Аффилиация | M J Usher; Dept. of Cybernetics, Univ. of Reading, Reading, UK |
| Аффилиация | I W Buckner; Dept. of Cybernetics, Univ. of Reading, Reading, UK |
| Аффилиация | R F Burch; Dept. of Cybernetics, Univ. of Reading, Reading, UK |
| Выпуск | 12 |
