Infrasound detector with force transducer for negative feedback or calibration
AssigneeGaiacode LTD
InventorsCansun Güralp, Cem Cansun Thomas Güralp
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Abstract
An infrasound detector for determining illicit nuclear explosions, comprising an infrasound transducer, signal feedback path, and feedback force transducer. The infrasound transducer is configured to transduce an infrasound signal to an electrical signal. The signal feedback path is arranged to feed a feedback signal from the infrasound transducer to a feedback force transducer. The feedback force transducer is configured to transduce a feedback electrical signal to a feedback force signal and arranged to provide the feedback force signal as input to the infrasound transducer, allowing seismic noise and/or environmental noise to be removed. The infrasound detector also allows for in-situ calibrations.
Claims17
An infrasound detector comprising:
- a housing holding an infrasound transducer and holding a feedback force transducer relative to the infrasound transducer for inputting a feedback force signal from the feedback force transducer to the infrasound transducer, wherein:
- the infrasound transducer is configured to transduce an infrasound signal to an electrical signal;
- the feedback force transducer is configured to transduce a negative feedback electrical signal to a feedback force signal:
- a signal feedback path is arranged to feed a negative feedback signal from the infrasound transducer to the feedback force transducer, the signal feedback path comprising a signal inverter arranged to invert the electrical signal from the infrasound transducer, with the negative feedback signal based on the inverted electrical signal from the infrasound transducer;
- wherein the infrasound detector is adapted for detection of ambient infrasound below 20 Hz outside the housing, and provides as outputs one or more electrical signals indicative of the infrasound signal.
Dependencies are inferred from the claim text.