Title:
SLIDING DOOR SYSTEM AND METHOD
Document Type and Number:
WIPO Patent Application WO/2018/015767
Kind Code:
A3
Abstract:
In one aspect, the present invention provides a sliding door monitoring system comprising a time-of-flight ranging sensor (10) and a retroreflector (80), wherein the time-of-flight ranging sensor comprises a transmitter of electromagnetic radiation and a receiver of electromagnetic radiation, and the retroreflector is positioned to reflect electromagnetic radiation from the transmitter to the receiver. In another aspect, the present invention also provides a method of monitoring a sliding door in a door opening, wherein the method comprises transmitting electromagnetic radiation across a gap in the door opening, reflecting the electromagnetic radiation from across the gap, receiving the reflected electromagnetic radiation on the same side of the gap as its transmission, measuring a time of flight of the electromagnetic radiation from its transmission to its reception and, optionally,an amount of the reflected electromagnetic radiation, and determining a size of the gap from both the time of flight and the amount of reflected electromagnetic radiation thus measured.
Inventors:
FORSHAW JOHN ANDREW (GB)
CRITCH COLIN JOHN (GB)
CRITCH COLIN JOHN (GB)
Application Number:
PCT/GB2017/052146
Publication Date:
February 22, 2018
Filing Date:
July 21, 2017
Export Citation:
Assignee:
AIRDRI LTD (GB)
International Classes:
B66B13/22; B66B13/18; B66B13/24
Foreign References:
| US20130048434A1 | 2013-02-28 | |||
| EP0016969A1 | 1980-10-15 | |||
| EP2165961A2 | 2010-03-24 | |||
| US4029176A | 1977-06-14 |
Attorney, Agent or Firm:
BINGHAM, Ian (GB)
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