Area Monitoring Sensor

• US 20090295577A1
• Filed: 04/21/2009
• Published: 12/03/2009
• Est. Priority Date: 06/03/2008
• Status: Abandoned Application

• Current Assignee: Keyence Corporation (Keyence)
• Original Assignee: Keyence Corporation (Keyence)
• Inventors: Yamaguchi, Akiji
• Application Number:
  US12/427,265
• Publication Number:
  US 20090295577A1
• Time in Patent Office: Days
• US Class Current: 340/541
• CPC Class Codes: F16P 3/144 using light grids
• CPC Class Codes: G01S 17/04 Systems determining the presence of a target
• CPC Class Codes: G08B 13/183 by interruption of a radiation beam or barrier

Abstract

Provided is an area monitoring sensor capable of recording sensing information of an intruder that has triggered to output an operation disable signal, and displaying the information as needed. The area monitoring sensor includes: an intruder sensing unit that emits detection light in different emitting directions and senses an intruder within a previously set monitor area based on reflection of the detection light; a signal output unit that outputs an operation disable signal based on a result of the sensing by the intruder sensing unit; a sensing history recording unit that stores a position of the intruder that has been sensed by the intruder sensing unit as sensing history; and a sensing history display unit that displays the sensing history in the sensing history recording unit based on an input signal from the operation input unit.

Claims

1. An area monitoring sensor, comprising:

an intruder sensing unit that emits detection light in different emitting directions and senses an intruder within a predetermined monitor area based on reflection of the detection light;

a signal output unit that outputs an operation disable signal based on a result of the sensing by the intruder sensing unit;

a sensing history recording unit that stores a position of the intruder sensed by the intruder sensing unit as sensing history; and

a sensing history display unit that displays the sensing history based on an operation input.

2. The area monitoring sensor according to claim 1, wherein the sensing history recording unit stores the position of the intruder represented in Cartesian coordinates centering the area monitoring sensor as the sensing history.

3. The area monitoring sensor according to claim 1, wherein

the sensing history recording stores the position of the intruder represented in polar coordinates centering the area monitoring sensor as the sensing history.

4. The area monitoring sensor according to claim 1, wherein

the sensing history recording unit stores time at which the intruder sensed in association with the sensing history.