Earth Tremors Observation by a Diamagnetic Levitation Based Inertial Sensor
- Resource Type
- Conference
- Authors
- Wang, Qiu; Ren, Xiaofang; Yan, Shitao; Jiao, Shimin; Xu, Xiaochao; Lei, Xiangzhou; Xu, Qiangwei; Hu, Chenyuan; Xu, Zhilin; Liu, Huafeng; Luo, Pengshun; Tu, Liangcheng
- Source
- 2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII) Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII), 2019 20th International Conference on. :511-514 Jun, 2019
- Subject
- Bioengineering
Components, Circuits, Devices and Systems
Fields, Waves and Electromagnetics
Photonics and Electrooptics
Power, Energy and Industry Applications
Robotics and Control Systems
Magnetic levitation
Magnetic domains
Optical sensors
Transducers
Magnetic flux
Diamagnetic levitation
Fabry–Perot interferometer
Earth tremors
Inertial sensor
Low frequency
- Language
- ISSN
- 2167-0021
This paper introduces a prototype of a diamagnetic levitation based inertial sensor which includes the diamagnetic levitation system and the optical displacement transducer. The proof mass is a floating magnet which is lifted by a fixed magnet above and sandwiched by two pyrolytic graphite sheets for stable levitation. A high precision optical displacement transducer has been developed with a noise floor of 1 nm/√Hz@1 Hz at atmosphere and room temperature. The fundamental frequency of the levitation system was measured as 0.65 Hz, giving an acceleration noise floor of 20 ng/√Hz@0.5 Hz. Benefitting on the excellent sensitivity and low-frequency responses, earth tremors at 0.2~0.3 Hz and 2~3 Hz have been observed using this inertial sensor.