Patent · US Active

System and method for determining position within or without a complex polygon geofence

US8046168B2 · kind B2 · utility

12Cited by

9References

1Claims

0Family size

Assignee

International Truck Intellectual Property Company, LLC · US

Inventors

Zhengming Wang · Fort Wayne, US
Xianguan Zeng · Fort Wayne, US

Key dates

Filing date	Oct 5, 2007
Grant date	Oct 25, 2011
Priority date	—
Expiry date	Aug 24, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG01S19/14
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A geofence system which locates a position as within or without the complex polygon type geofence using a simplified algorithm. The algorithm obtains a position and compares it to the polygon by establishing a ray from the position constructed in a cardinal direction of the coordinate system. The “polarity” of the count of intersections between the ray and geofence indicates whether the position is inside the geofence or not.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.