Barrier detection system and method

• US 9,625,594 B2
• Filed: 10/06/2015
• Issued: 04/18/2017
• Est. Priority Date: 03/17/2011
• Status: Expired due to Fees

• Current Assignee: Ardmore Associates, LLC
• Original Assignee: Ardmore Associates, LLC
• Inventors: Spencer, Glenn, King, Michael S.
• Primary Examiner(s): Ratcliffe, Luke
• Assistant Examiner(s): Baghdasaryan, Hovhannes
• Application Number:
  US14/876,522
• Publication Number:
  US 20160025879A1
• Time in Patent Office: 560 Days
• CPC Class Codes: G01V 1/242 Seismographs
• CPC Class Codes: G01V 1/30 Analysis G01V1/50 takes precedence
• CPC Class Codes: G01V 2210/123 Passive source, e.g. microseismics

Abstract

Embodiments of the invention provide a barrier detection system that includes a plurality of sensors that are coupled in series to a seismograph. The seismograph receives a signal from the sensors. The system includes a computer system including computer storage and a processor. The computer system is in communication with the seismograph so that the computer system receives signals from seismograph and stores them in the computer storage. The system can include an object detection system that can process the signals received by the computer system from the seismograph. The object detection system can select a first portion of the signal to analyze based a predetermined time interval, create a baseline value for the first portion, and select a plurality of peaks from the first portion. The object detection can also analyze an amplitude, frequency, and periodicity of the first portion to assess the origin of the signal.

Claims

1. A barrier detection system comprising:

a plurality of sensors configured and arranged to be coupled in series to at least one seismograph, the seismograph configured and arranged to receive a signal from the plurality of sensors, the signal comprising a plurality of seismic readings;

a computer system comprising computer storage and a processor, the computer system configured and arranged to be in communication with the seismograph so that the computer system receives the signal from the seismograph, the computer system configured and arranged to store at least a portion of the signal in the computer storage; and

an object detection system being stored in the computer storage and being executable by the processor, the object detection system being configured to select a first portion of the signal to analyze based on a predetermined time interval,

create a baseline value for the first portion by averaging all of the seismic readings that are beneath a specified amplitude threshold, and process the signal by filtering out at least a background signal based on the baseline value,

select a plurality of peaks from the first portion,

select a first peak from the plurality of peaks,

compare an amplitude of the first peak to an amplitude threshold value stored in the computer storage so that if the first peak exceeds the amplitude threshold, a timer is initiated to begin tracking the signal, and

determine a rate of change of amplitude of at least a portion of the signal,

compare the rate of change of amplitude to stored values of rates of changes of amplitude of potential targets, the potential targets being at least one of a vehicle, a human, and an animal; and

based at least in part on any one or more similarities between the rate of change of amplitude to one or more stored values of rates of changes of amplitude of potential targets, measuring the frequency value and the periodicity value of the plurality of peaks from the first portion.

2. The barrier detection system of claim 1, further comprising the object detection system being configured to compare the remaining peaks of the first portion to the amplitude threshold for a specified period of time.

3. The barrier detection system of claim 2, wherein if the objection detection system determines amplitudes of some of the remaining peaks comprise an amplitude generally lower than the amplitude threshold during the specified period of time, the timer is deactivated and the object detection system compares a frequency value and a periodicity value of the plurality of peaks from the first portion to signatures stored in the computer storage to determine an origin of the signal.

4. The barrier detection system of claim 1, wherein the seismograph is configured and arranged to convert the signal from an analog format to a digital format.

5. The barrier detection system of claim 1, and further comprising an antenna configured and arranged to be coupled to the computer system.

6. The barrier detection system of claim 1, wherein the plurality of sensors comprises at least one geophone.

7. The barrier detection system of claim 1, wherein the seismograph comprises a plurality of channels.

8. The barrier detection system of claim 7, wherein the plurality of sensors comprises strings of sensors, and wherein the seismograph is configured and arranged so that each of the strings of sensors is configured and arranged to be in communication with at least one of the plurality of channels.

9. The barrier detection system of claim 1, wherein the object detection system is further configured to transmit an alert signal to a monitoring system if the frequency value and the periodicity value of the plurality of peaks from the first portion are substantially similar to a signature corresponding to at least one trackable target producing the signal.

10. The barrier detection system of claim 1, wherein at least a portion of the plurality of sensors are configured and arranged to be being buried underground.