Detecting objects in a restricted zone

A restricted zone enforcement system for detecting one or more undesired objects in a restricted zone at a worksite, the system comprising:

• a first base station configured to be placed in a first location, the first location being in or around the restricted zone;
• and
• a second base station configured to be placed in a second location, the second location being in or around the restricted zone;
• wherein the first base station and the second base station each include:
• a housing;
• a sensor suite configured to detect one or more undesired objects in a subzone at least partially overlapping with the restricted zone and generate an output signal based on the one or more undesired objects, the subzone being limited by a range of detection from the sensor suite;
• a base station controller configured to receive the output signal from the sensor suite and transmit an alert signal based on the output signal;
• and
• a warning indicator configured to activate in response to receiving the alert signal;
• and
• wherein the subzone is restricted by a straight line between the first base station and the second base station, the straight line defining at least a portion of a perimeter of the subzone.

A mobile device comprising:

• a touch screen display;
• an interface module configured to display an aerial map of a worksite on the touch screen display and to receive an operator input from the touch screen display;
• and
• a geofence module configured to:
• determine a geofence subzone based on the operator input by:
• identifying locations of base stations on the aerial map, the base stations being located at the worksite for detecting one or more undesired objects in subzones at the worksite;
• and
• identifying an overlap between the subzones and the geofence subzone where detection of the one or more undesired objects is to be enforced;
• and
• construct a polygonal representation of the operator input to define the geofence subzone relative to the base stations on the aerial map.