Infra-sound surveillance system
AssigneeNokia Corporation
InventorNorbert Pieper
Life of this patent
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Abstract
The invention is a method for monitoring an environment by evaluating an infrasonic signal obtained from said environment. The method includes averaging said infrasonic signal (Vinfra) to provide an averaged infrasonic signal (Vav), mapping said averaged infrasonic signal (Vav) according to a function to provide an infrasonic noise signal (Vnoise); averaging said infrasonic noise signal (Vnoise) to provide an averaged infrasonic noise signal (Vav noise); offsetting said averaged infrasonic noise signal (Vav noise) with an offset value to provide an infrasonic level signal (Vlimit); comparing said infrasonic level signal (Vlimit) with said averaged infrasonic signal (Vav); and generating a trigger signal (30) if said averaged infrasonic signal (Vav) is greater than said infrasonic level signal (Vlimit).
Claims29
A method for monitoring a surveyed space by evaluating an infrasonic signal obtained from said surveyed space, comprising:
- averaging said infrasonic signal from said surveyed space to provide an averaged infrasonic signal,
- mapping said averaged infrasonic signal according to a function to provide an infrasonic noise signal,
- averaging said infrasonic noise signal to provide an averaged infrasonic noise signal,
- offsetting said averaged infrasonic noise signal with an offset value to provide an infrasonic level signal,
- comparing said infrasonic level signal with said averaged infrasonic signal and
- generating a trigger signal if said averaged infrasonic signal is greater than said infrasonic level signal.
A module for monitoring a surveyed space by evaluating an infrasonic signal obtained from said surveyed space, comprising:
- a first averaging component for averaging said infrasonic signal from said surveyed space to provide an averaged infrasonic signal,
- a mapping component for mapping said averaged infrasonic signal according to a function to provide an infrasonic noise signal,
- a second averaging component for averaging said infrasonic noise signal to provide an averaged infrasonic noise signal,
- an offsetting component for offsetting said averaged infrasonic noise signal with an offset value to provide an infrasonic level signal,
- a comparing component for comparing said infrasonic level signal with said averaged infrasonic signal and
- a generating component for generating a trigger signal if said averaged infrasonic signal is greater than said infrasonic level signal.
Dependencies are inferred from the claim text.