Title:
光線式検知装置
Document Type and Number:
Japanese Patent JP7080432
Kind Code:
B2
Abstract:
To realize an optical detector constructed in two stages, with two light projection means and two light receiving means arranged in rows one above another, with which one stage detection is possible without complicating the shape of pulse signal light emitted from a light projector.SOLUTION: An optical detector is configured with a light projector equipped with one or a plurality of light projection units, and a light receiver equipped with one or a plurality of light receiving units corresponding to the light projection units, the light projector and light receiver including a synchronizing signal input unit. The light projector accepts input of the PPS signal of a GNSS receiver module from the synchronizing signal input unit and takes it as a synchronizing signal, with each light projection unit projecting a signal at different timing. The light receiver accepts input of the PPS signal of a GNSS receiver module from the synchronizing signal input unit and takes it as a synchronizing signal, and takes a signal received at the same timing as each light projection unit which each light receiving unit corresponds to, as a received light signal, and outputs a detection signal when the received light signal of one of the light receiving units is discontinued for a duration longer than a first set time.SELECTED DRAWING: Figure 1
Inventors:
Keisuke Murakami
Naoki Umeno
Naoki Umeno
Application Number:
JP2019092368A
Publication Date:
June 06, 2022
Filing Date:
May 15, 2019
Export Citation:
Assignee:
Takenaka Engineering Co., Ltd.
International Classes:
G08B13/183; G01V8/20; G08B21/02; H01H35/00
Domestic Patent References:
| JP2012048481A | ||||
| JP2005242710A | ||||
| JP2004355170A | ||||
| JP62263489A | ||||
| JP2000194971A | ||||
| JP2549809Y2 | ||||
| JP11310131A | ||||
| JP2092592U | ||||
| JP2000057448A | ||||
| JP2008269373A | ||||
| JP9297184A | ||||
| JP2004186744A | ||||
| JP2020012747A |
Foreign References:
| US20060072012 |
Previous Patent: Soil repair equipment and repair methods for organic chlorine pesticide-contaminated areas
Next Patent: Cloud device system
Next Patent: Cloud device system