Title:
MULTI-OPTICAL-AXIS PHOTOELECTRIC SENSOR
Document Type and Number:
Japanese Patent JP3860013
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a multi-optical-axis photoelectric sensor which can prevent the mutual interference between the multi-optical-axis photoelectric sensors without installing synchronizing line between the multi-optical-axis photoelectric sensors.
SOLUTION: An interference light is detected based on an interference light detection timing signal Si provided just in front of a light shielding detection timing signal Sr. When the interference light is continuously detected in the detection timing of the interference light of the same optical axis, the pulse position of the light shielding detection timing signal is displaced and it avoids overlapping with the pulse of the interference light on the time base and prevents the mutual interference by shortening the time of the pause period (tb).
Inventors:
Toru Waki
Application Number:
JP2001331504A
Publication Date:
December 20, 2006
Filing Date:
October 29, 2001
Export Citation:
Assignee:
Thanks Co., Ltd.
International Classes:
H03K17/78; F16P3/14; G01D5/34; G01V8/20; (IPC1-7): H03K17/78
Domestic Patent References:
| JP61137420A | ||||
| JP11260215A |
Attorney, Agent or Firm:
Arisa Ushiro