Title:
CAR POSITION DETECTION DEVICE AND ELEVATOR SAFETY DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2022/269893
Kind Code:
A1
Abstract:
Disclosed is a highly reliable car position detection device that measures the position of a passenger car on the basis of images of the inside of a shaft. This car position detection device detects the position of a passenger car (1) on the basis of images of the inside of a shaft and comprises: an image sensor (9a) that acquires a surface image of a guide rail (5a); first marks (10(1a), 11(1a), 12(1a)) and second marks (10(2a), 11(2a), 12(2a)) that are provided near each other on the surface of the guide rail; and a safety controller (8) that, on the basis of an image of the first marks and the second marks, corrects the position of the passenger car as calculated on the basis of the surface image acquired by the image sensor. Upon detecting an abnormality in the first marks or the second marks on the basis of position information for the first marks or the second marks and the calculated position of the passenger car, the safety controller uses the good marks from among the first marks and the second marks to measure the position of the passenger car.
Inventors:
SAITO YUKI (JP)
IWAMOTO AKIRA (JP)
ONISHI YOSHITO (JP)
IWAMOTO AKIRA (JP)
ONISHI YOSHITO (JP)
Application Number:
PCT/JP2021/024095
Publication Date:
December 29, 2022
Filing Date:
June 25, 2021
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
B66B3/02
Domestic Patent References:
| WO2013007505A1 | 2013-01-17 | |||
| WO2021038984A1 | 2021-03-04 |
Foreign References:
| JP2002274765A | 2002-09-25 | |||
| JP2011073885A | 2011-04-14 | |||
| US20200198929A1 | 2020-06-25 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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