US 9,984,543 B2 · Anomaly detection system and method

Abstract

An acoustic array system for anomaly detection is provided. The acoustic array system (100) performs a scan (or a progressive scan of frequencies) of a given volume by transmitting one or more signals, and receives one or more reflected signals from objects within the volume. The reflected signals are then amplified and converted to a set of digital signals. Features of the set of digital signals are extracted both in time and frequency domains. The acoustic array system (100) further performs a comparison of these set of digital extracted features with the reflected signals via machine learning techniques. Based on the comparison, the acoustic array system detects one or more anomalies.

Claims20

Dependent claims

A method comprising:

(i) insonifying at a first time interval, by using an acoustic array system, a volume at one or more predetermined frequencies from a first location by transmitting one or more signals;
(ii) receiving one or more reflected signals from one or more objects in said first location based on said one or more transmitted signals;
(iii) repeating the steps (i) till (ii) until a last location in said volume is insonified to obtain a first set of reflected signals;
(iv) amplifying said first set of reflected signals to obtain a set of amplified signals;
(v) converting said set of amplified signals to a set of digital signals;
(vi) performing a comparison of said set of digital signals with said first set of reflected signals;
and
(vii) detecting, at said first time interval, one or more anomalies based on said comparison.

5 more elements

An acoustic array system, comprising:

one or more transmitters that are configured to transmit, at a first time interval, one or more signals at one or more predetermined frequencies, for insonifying a volume from a first location;
one or more receivers that are configured to receive one or more reflected signals from one or more objects in said first location based on said one or more transmitted signals, wherein said one or more signals are transmitted until a last location in said volume is insonified to obtain a first set of reflected signals;
a microphone pre-amplification unit that is configured to amplify said first set of reflected signals to obtain a set of amplified signals;
a multi-channel synchronous analog to digital converter (ADC) that is configured to convert said set of amplified signals to a set of digital signals;
and
a processor that is configured to perform a comparison of said set of digital signals with said first set of reflected signals, and detect, at said first time interval, one or more anomalies based on said comparison.

3 more elements

One or more non-transitory machine readable information storage mediums comprising one or more instructions which when executed by one or more acoustic array systems causes:

(i) insonifying at a first time interval, by using an acoustic array system, a volume at one or more predetermined frequencies from a first location by transmitting one or more signals;
(ii) receiving one or more reflected signals from one or more objects in the first location based on the one or more transmitted signals;
(iii) repeating the steps (i) till (ii) until a last location in the volume is insonified to obtain a first set of reflected signals;
(iv) amplifying the first set of reflected signals to obtain a set of amplified signals;
(v) converting the set of amplified signals to a set of digital signals;
(vi) performing a comparison of the set of digital signals with the first set of reflected signals;
and (vii) detecting, at the first time interval, one or more anomalies based on the comparison.

4 more elements

Dependencies are inferred from the claim text.

Anomaly detection system and method

Life of this patent

Anomaly detection system and method

Life of this patent

Abstract

Claims20