Electronic fence

The invention discloses an electronic fence, which comprises a dot line judgment method. According to the dot line judgment method, firstly, each edge of a polygon is taken as a directed line segmentwhich is connected in an end-to-end mode. If the direction of a certain point relative to each edge o...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BAO SHIYAO, LIU CHUNYANG, ZHANG GUOTAO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CALCULATING COMPUTING COUNTING DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES PHYSICS SIGNALLING SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR TRAFFIC CONTROL SYSTEMS
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Beschreibung
Zusammenfassung:	The invention discloses an electronic fence, which comprises a dot line judgment method. According to the dot line judgment method, firstly, each edge of a polygon is taken as a directed line segmentwhich is connected in an end-to-end mode. If the direction of a certain point relative to each edge of the polygon is the same, the certain point is located in the polygon. The core step of the electronic fence is to figure out the values of two points (x1, y1) and (x2, y2) closest to a point (x, y), and is applied to a convex polygon. According to the electronic fence provided by the invention, the optimized algorithm of the electronic fence is achieved, so that the efficiency in searching motorcycles which drive in and out of the e electronic fence is improved. The software structure and thedatabase structure of the electronic fence are designed to realize the electronic fence. According to the design of the electronic fence, the polygon is directly drawn on a map, which has a great error with an actual geograph