Ground motion can be measured as displacement, velocity, or acceleration. A mass spring sensor is used for all these measurements. Physical Logic’s in-plane bulk micromachining technology allows for realization of a proof mass spring design to achieve a noise density below 1 µg/√Hz for recommended ranges of ±2g and ±5g. We open the possibility to compete with standard seismometers, allowing the construction of cost- and power-efficient seismic sensors. The high precision seismic accelerometers are installed at a constant distance from each other in a tectonic border zone; this enables an instant earthquake wave’s detection and fast alert to nearby populations.
The particular direction of installation of two sensors is optimized to detect P-waves, which propagate parallel to the ground, or S-waves, which are perpendicular to the ground surface.
Physical Logic’s MEMS accelerometers are designed and manufactured in Israel. They are all ITAR free and the MAXL-OL-2002C is export controlled free.
- Wide dynamic range from ±2g to ±10g
- Linear frequency response from DC to about 300 Hz
- Low noise down to 1µg/√Hz level
- High bias and scale factor stability
- Supreme linearity performance
- Operating temperatures -40ºC to +85ºC
- Low power consumption