System and method for protecting the location of an acoustic event detector
View Patent ↗A system and method for protecting sensor positions in an array of acoustic sensors which make up a gunfire locator system. The inventive system includes a purity of sensors and a host computer. Each sensor includes: a microphone for receiving acoustic information; a processor for processing acoustic information to detect an acoustic event and determine a time of arrival; a GPS receiver; an encryption module for encrypting transmitted sensor positions; and a network interface for transmitting sensor positions and times of arrival. The host computer includes: a network interface for receiving sensor transmissions; an encryption module for deciphering sensor positions; and a CPU.
1. A gunshot detection system comprising:
a plurality of acoustic sensors, each sensor including:
a microphone for receiving acoustic information;
a processor in communication with said microphone for processing said acoustic information to detect an acoustic event and determine a time of arrival of said acoustic event;
a GPS receiver for providing a first position of said each sensor;
a first encryption module for encrypting said first position to create a secure position; and
a network interface for transmitting said secure position and said time of arrival; and
a host processor including:
a network interface for receiving said secure position and said time of arrival;
a second encryption module for deciphering said secure position to restore said first position;
a processor for determining a source location of said acoustic event from information collected from said plurality of sensors.
2. The gunshot detection system of claim 1 wherein said time of arrival is encrypted by said first encryption module and deciphered by said second encryption module.
3. The gunshot detection system of claim 2 wherein said secure position is encrypted by said first encryption module and deciphered by said second encryption module.