System and method for precision acoustic event detection
First Claim
1. A gunshot detection system comprising:
- an array of sensors, at least one sensor of said array of sensors comprises;
a microphone for receiving acoustic signals;
a processor for processing received acoustic signals to detect an acoustic event;
a first commercial GPS receiver for determining a sensor position; and
a first network interface;
a differential node at a known location, said differential node comprising;
a second GPS receiver for determining a GPS position; and
a second network interface; and
a server comprising;
a CPU; and
a third network interface in communication with said first and second network interfaces such that said one or more sensors can communicate with said host node and said differential node can communicate with said host node, wherein said at least one sensor communicates said sensor position to said server and said differential node communicates said GPS position to said server and wherein when said acoustic event is detected, said at least one sensor communicates event information to said server and said server computes a precision position for said at least one sensor based on said sensor position and said GPS position.
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0 Petitions
Accused Products
Abstract
Systems and methods of providing precision locations for sensors which make up an array of sensors in a gunshot detection system. Consistent with some exemplary implementations, sensors may employ a commercial GPS which reports a sensor position or a group of pseudoranges to GPS satellites. A server may collect differential information from a differential node and, in one exemplary implementation, may calculate a precision position for each sensor by adjusting the reported position or pseudoranges with the differential information. In other exemplary implementations, differential information may be sent from the host to individual sensors which calculate their own precision positions. Exemplary differential information may include latitude and longitude corrections, pseudorange corrections, ionospheric delay, GPS satellite clock drift, or other corrective term which will improve the accuracy of a sensor position.
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Citations
13 Claims
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1. A gunshot detection system comprising:
- an array of sensors, at least one sensor of said array of sensors comprises;
a microphone for receiving acoustic signals; a processor for processing received acoustic signals to detect an acoustic event; a first commercial GPS receiver for determining a sensor position; and a first network interface;
a differential node at a known location, said differential node comprising;a second GPS receiver for determining a GPS position; and a second network interface; and
a server comprising;a CPU; and a third network interface in communication with said first and second network interfaces such that said one or more sensors can communicate with said host node and said differential node can communicate with said host node, wherein said at least one sensor communicates said sensor position to said server and said differential node communicates said GPS position to said server and wherein when said acoustic event is detected, said at least one sensor communicates event information to said server and said server computes a precision position for said at least one sensor based on said sensor position and said GPS position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- an array of sensors, at least one sensor of said array of sensors comprises;
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9. In a system having an array of commercial GPS based sensors, a method for determining a precision position for at least one sensor of said sensor array including the steps of:
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(a) receiving a sensor position from said at least one sensor; (b) receiving a GPS position from a commercial GPS at a known location; (c) calculating a position difference between said known location and said GPS location; and (d) calculating a precision position by adjusting said sensor position with said position difference. - View Dependent Claims (10, 11)
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12. A method for determining a precision position for at least one sensor of a sensor array wherein WAAS information is available from a commercial GPS located proximate said sensor array, the method including the steps of:
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(a) receiving WAAS information from said commercial GPS; (b) transmitting said WAAS information to said at least one sensor; (c) receiving said WAAS information at said at least one sensor; (d) calculating a precision position for said at least one sensor by adjusting a local position provided by a local GPS at said at least one sensor with said WAAS information.
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13-55. -55. (canceled)
Specification