System and method for precision acoustic event detection
First Claim
1. A weapon fire detection sensor comprising:
- a microphone for receiving an acoustic signal of a weapon fire event;
a first commercial GPS receiver that provides commercial GPS sensor location information regarding the sensor;
a network interface configured to communicate with a host processing unit that is associated with an array of sensors and has a second commercial GPS receiver and a military GPS receiver; and
a processor that;
receives, via the network interface, a precise location of the sensor calculated by the host processing unit as a function of the commercial GPS sensor location information, a commercial GPS signal from the second commercial GPS receiver, and a military GPS signal from the military GPS receiver; and
determines a precise source location of the weapon fire event using the precise location of the sensor, wherein the precise source location of the weapon fire event is more accurate than weapon fire source location information obtained without using the precise location.
9 Assignments
0 Petitions
Accused Products
Abstract
A system and method for providing precision locations for sensors which make up an array of sensors in a gunshot detection system. In a preferred embodiment sensors employ a commercial GPS which reports a sensor position or a group of pseudoranges to GPS satellites. A server collects differential information from a differential node and, in one preferred embodiment, calculates a precision position for each sensor by adjusting the reported position or pseudoranges with the differential information. In another preferred embodiment differential information is sent from the host to individual sensors which calculate their own precision positions. Differential information may be 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.
-
Citations
21 Claims
-
1. A weapon fire detection sensor comprising:
-
a microphone for receiving an acoustic signal of a weapon fire event; a first commercial GPS receiver that provides commercial GPS sensor location information regarding the sensor; a network interface configured to communicate with a host processing unit that is associated with an array of sensors and has a second commercial GPS receiver and a military GPS receiver; and a processor that; receives, via the network interface, a precise location of the sensor calculated by the host processing unit as a function of the commercial GPS sensor location information, a commercial GPS signal from the second commercial GPS receiver, and a military GPS signal from the military GPS receiver; and determines a precise source location of the weapon fire event using the precise location of the sensor, wherein the precise source location of the weapon fire event is more accurate than weapon fire source location information obtained without using the precise location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A weapon fire detection sensor comprising:
-
a microphone for receiving an acoustic signal of a weapon fire event; a first commercial GPS receiver that provides commercial GPS sensor location information regarding the sensor; a network interface configured to communicate with a host processing unit that is associated with an array of sensors and has a second commercial GPS receiver and a military GPS receiver, wherein the network interface is configured to receive, from the host processing unit, precision position information determined as a function of a commercial GPS signal from the second commercial GPS receiver and a military GPS signal from the military GPS receiver; and a processor that; calculates a precise location of the sensor as a function of the commercial GPS sensor location information and the precision position information; and determines a precise source location of the weapon fire event using the precise location of the sensor, wherein the precise source location of the weapon fire event is more accurate than weapon fire source location information obtained without using the precise location of the sensor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. A computer readable medium containing computer readable instructions executable to perform a method for determining a precise source location of a weapon fire event detected by a weapon fire detection sensor, the method comprising:
-
processing an acoustic signal of a weapon fire event detected at a microphone in the weapon fire detection sensor; receiving commercial GPS sensor location information regarding the weapon fire detection sensor from a first commercial GPS receiver; communicating, via a network interface, with a host processing unit that is associated with an array of sensors and has a second commercial GPS receiver and a military GPS receiver; processing precision position information, from the host processing unit, that is determined as a function of a commercial GPS signal from the second commercial GPS receiver and a military GPS signal from the military GPS receiver; calculating a precise location of the sensor as a function of the commercial GPS sensor location information and the precision position information; and determining a precise source location of the weapon fire event using the precise location of the sensor, wherein the precise source location of the weapon fire event is more accurate than weapon fire source location information obtained without using the precise location of the sensor. - View Dependent Claims (18, 19, 20, 21)
-
Specification