×

Safety photoelectric switch

  • US 8,330,095 B2
  • Filed: 12/22/2009
  • Issued: 12/11/2012
  • Est. Priority Date: 01/31/2009
  • Status: Active Grant
First Claim
Patent Images

1. An optical scanning type photoelectric switch, which performs two-dimensional scanning with light projection pulse to detect an object, and also measures a distance to the object to sense a two-dimensional position of the object, the switch having;

  • a storage device for accepting and storing a change in a light projection period of the light projection pulse, a scanning period for scanning with the light projection pulse or a phase of the light projection pulse with respect to the light projection period;

    a light projection/reception controlling device for controlling light projection/reception based upon the light projection period or the scanning period stored in the storage device; and

    a safety signal output controlling device for switching a safety signal from a permission signal to a non-permission signal when light reflected by the object is received and it is determined that a position of the object is inside a protection area based on at least two scannings in succession.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×