Classifying vibrations
AssigneeAssa Abloy AB
InventorsTomas Jonsson, Mats Cederblad, Per Mackegård, Stefan Johansson
Life of this patent
Estimating the term…
Abstract
It is provided a method for classifying vibrations detected in a structure of a building. The method is performed in a vibration classifier and comprising the steps of: determining a measurement period of a vibration signal; splitting the measurement period in a plurality of sequential sub-periods; calculating, for each one of the sub-periods, a variation indicator of at least one component of the vibration signal; and classifying a source of the vibration signal based on the variation indicators.
Claims17
A method for classifying vibrations detected in a structure of a building, the method being performed in a vibration classifier and comprising:
- determining a measurement period of a vibration signal;
- splitting the measurement period in a plurality of sequential sub-periods;
- calculating, for each one of the sub-periods, a variation indicator being a parameter that indicates variation of at least one component of the vibration signal, by calculating the variation indicator based on accumulating differences between consecutive sample values in the time-domain;
- classifying a source of the vibration signal based on the variation indicators;
- and
- causing an alarm to trigger when the source of the vibration signal is associated with a break-in attempt.
A vibration classifier for classifying vibrations detected in a structure of a building, the vibration classifier comprising:
- a processor;
- and
- a memory storing instructions that, when executed by the processor, cause the vibration classifier to:
- determine a measurement period of a vibration signal;
- split the measurement period in a plurality of sequential sub-periods;
- calculate, for each one of the sub-periods, a variation indicator being a parameter that indicates variation of at least one component of the vibration signal, by calculating the variation indicator based on accumulating differences between consecutive sample values in the time-domain;
- classify a source of the vibration signal based on the variation indicators;
- and
- cause an alarm to trigger when the source of the vibration signal is associated with a break-in attempt.
A non-transitory computer readable medium storing a computer program for classifying vibrations detected in a structure of a building, the computer program comprising computer program code which, when run on a vibration classifier, causes the vibration classifier to:
- determine a measurement period of a vibration signal;
- split the measurement period in a plurality of sequential sub-periods;
- calculate, for each one of the sub-periods, a variation indicator being a parameter that indicates variation of at least one component of the vibration signal, by calculating the variation indicator based on accumulating differences between consecutive sample values in the time-domain;
- classify a source of the vibration signal based on the variation indicators;
- and
- cause an alarm to trigger when the source of the vibration signal is associated with a break-in attempt.
Dependencies are inferred from the claim text.