High Performance Geophone Sensors

Geophone seismic intrusion detection systems offer a reliable and cost-effective solution. Sensor lines follow the terrain with no need for line of sight. Where heavy landscaping, hilly terrain, and inconsistent perimeter shapes make other systems costly and impractical, SGS performs properly.

The basic components of the seismic system are the geophone sensors and the seismic signal processor.

Geophones are placed in or on earth, asphalt or concrete to detect low-level intruder vibrations. These signals are processed and analyzed to selectively discriminate between actual intruders and natural disturbances.

Two types of geophone lines can be included in the system: a detector line and a discriminator line. In areas where vehicular traffic is not anticipated, the detector line and the signal processing capabilities provide the necessary protection while filtering out nuisance alarms. When the seismic system is installed near highways, railroads, or other vibration sources, discriminator lines are required.

The seismic signal processors compare signals generated by the geophones to a user adjustable threshold. As each signal crosses this threshold, it is scanned for timing, count and other criteria. It also compares detector line inputs to discriminator line inputs to filter out ambient disturbances. When all criteria are met, the logic system generates an alarm condition.

Each processor may be easily interconnected to standard security monitoring systems via normally closed or open alarm relay contacts. Security System Integration  Software (SSIS).