Title:
PHOTOELECTRIC SENSOR
Document Type and Number:
WIPO Patent Application WO/2020/026832
Kind Code:
A1
Abstract:
Provided is a photoelectric sensor that determines the state of a target by means of a simple configuration and without a time lag. A photoelectric sensor that comprises a light projection unit, a light reception unit, FIFO memory, a model storage unit, and a determination unit. The light projection unit emits light toward a detection area to which a target will arrive. The light reception unit acquires chronological signal values that are based on received light. The FIFO memory stores a prescribed number of signal values in the order of the acquisition thereof and periodically updates the prescribed number of signal values using newly acquired signal values. The model storage unit stores a determination model that determines a rank for the agreement between: a waveform that is formed from the prescribed number of signal values stored in the FIFO memory; and a reference waveform that corresponds to a specific state for the target. The determination unit uses the determination model to make a determination each time the FIFO memory is updated or once every time the FIFO memory is updated a plurality of times and determines the state of the target on the basis of the rank for the agreement.
Inventors:
KOGASHI KAEN (JP)
Application Number:
PCT/JP2019/028266
Publication Date:
February 06, 2020
Filing Date:
July 18, 2019
Export Citation:
Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
International Classes:
H03K17/945; G01B11/24; G01N21/17; G01V8/12; H01H35/00
Foreign References:
| JPH09252243A | 1997-09-22 | |||
| JPH05248829A | 1993-09-28 | |||
| JP2009236751A | 2009-10-15 | |||
| JP2004320373A | 2004-11-11 | |||
| JP2016191568A | 2016-11-10 | |||
| JP2007072665A | 2007-03-22 |
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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