Skip Links

USGS - science for a changing world

Open-File Report 2014–1047

A Brief Test of the Hewlett-Packard MEMS Seismic Accelerometer

By Brian D. Homeijer, Donald J. Milligan, and Charles R. Hutt

Thumbnail of and link to report PDF (2.2 MB)Abstract

Testing was performed on a prototype of Hewlett-Packard (HP) Micro-Electro-Mechanical Systems (MEMS) seismic accelerometer at the U.S. Geological Survey’s Albuquerque Seismological Laboratory. This prototype was built using discrete electronic components. The self-noise level was measured during low seismic background conditions and found to be 9.8 ng/√Hz at periods below 0.2 s (frequencies above 5 Hz). The six-second microseism noise was also discernible. The HP MEMS accelerometer was compared to a Geotech Model GS-13 reference seismometer during seismic noise and signal levels well above the self-noise of the accelerometer. Matching power spectral densities (corrected for accelerometer and seismometer responses to represent true ground motion) indicated that the HP MEMS accelerometer has a flat (constant) response to acceleration from 0.0125 Hz to at least 62.5 Hz. Tilt calibrations of the HP MEMS accelerometer verified that the flat response to acceleration extends to 0 Hz.

Future development of the HP MEMS accelerometer includes replacing the discreet electronic boards with a low power application-specific integrated circuit (ASIC) and increasing the dynamic range of the sensor to detect strong motion signals above one gravitational acceleration, while maintaining the self-noise observed during these tests.

First posted April 8, 2014

For additional information, contact:
Director, Geologic Hazards Science Center
U.S. Geological Survey
Denver Federal Center
PO Box 25046 MS-966
Denver, CO 80225
http://geohazards.cr.usgs.gov/

Part or all of this report is presented in Portable Document Format (PDF). For best results viewing and printing PDF documents, it is recommended that you download the documents to your computer and open them with Adobe Reader. PDF documents opened from your browser may not display or print as intended. Download the latest version of Adobe Reader, free of charge.


Suggested citation:

Homeijer, B.D., Milligan, D.J., and Hutt, C.R., 2014, A Brief Test of the Hewlett-Packard MEMS Seismic Accelerometer: U.S. Geological Survey Open-File Report 2014–1047, 18 p., https://dx.doi.org/10.3133/ofr20141047.

ISSN 2331-1258 (online)



Contents

Abstract

1. Introduction

2. MEMS Accelerometer

3. Tests Performed

4. Summary

5. References


Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/of/2014/1047/
Page Contact Information: Contact USGS
Page Last Modified: Wednesday, December 07, 2016, 07:34:53 PM