Towards a New Low Power Low Noise Class B MEMS Accelerometer for Structural Health Monitoring
Abstract »MEMS vibrometers are very interesting due to their small size and potentially low cost. However there is often a tradeoff between low noise and high power for closed loop accelerometers and high noise and low power for open loop accelerometers. Safran Colibrys is developing state of the art low power open loop accelerometers that enable both low power and low noise operation. Such devices will be well suited to structural health monitoring in situations where wireless operation and self powered operation are highly desirable.
For example the new released VS1002 accelerometer offers a power consumption of <10mW with an acceleration range of +/-2g and a noise (in band) of 7µg/√Hz, which gives a 90dB dynamic range for 100Hz bandwidth. This new family of MEMS accelerometers consist of a MEMS chip with an ASIC in the same package. As well as excellent performance, the final product fits into a small footprint of 9mmx9mm.
After careful analysis of the performance of the VS1000 family of accelerometers, we have been able to identify improvements that could lead to a significantly lower noise level and permit a dynamic range of 110dB without changing the open loop architecture of the accelerometer which will enable us to retain all the excellent characteristics of the existing VS1000 sensor family.
This paper will describe the current state of the art in low power MEMS accelerometers for structural health monitoring and describe the approaches to achieving a low power class B device.
Biography: Pierre is a product management professional with more than 15 years of experience in the high-tech industry. His key responsibilities are the management of the product line and the business development of Safran Colibrys’ Vibration and Seismic sensors, as well as key account management of strategic technical customers across the globe. LinkedIn
Affiliation: Colibrys Yverdon-les-Bains SwitzerlandRudolf, FelixRudolf, Felix firstname.lastname@example.org
Biography: Prior to co-founding Colibrys as a spin-off from CSEM, Felix Rudolf had been involved in the research and development of MEMS technologies for over 20 years. His key responsibilities are the alignment of the technology / product roadmaps with the business strategy, the coordination of R&D projects with external research organizations and the development of the IP Portfolio. www.colibrys.com