A new magnet and coil digital microbarometer: DMB1

Guillaume Nief , Philippe Millier , Nicolas Brebion

Since the infrasound technology was chosen to ensure the respect of the Comprehensive Nuclear-Test-Ban Treaty, it has been experiencing a renewal. The development of high-sensitivity, high-resolution, low-noise and low-cost infrasound sensors has thus become a need for installing operational infrasound recording station, as well as for research purpose (study of sources, study of atmosphere as an acoustical propagation medium...). A new model of digital microbarometer, DMB1, is proposed. The pressure sensitive element is a metallic bellows ; a magnet and coil device is used as an electromagnetic transducer. The digitization electronic board is encapsulated, and synchronised by a GPS clock. The sensor's characteristics are detailed and analysed in terms of noise floor, sensitivity, resolution, pass band and full range scale. A model describing the behaviour of the sensor is also proposed.

Mots clés: infrasound; microbarometer; metrology

Domaines: Acoustique [physics.class-ph]

Guillaume Nief, Philippe Millier, Nicolas Brebion. A new magnet and coil digital microbarometer: DMB1. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811174⟩