US 12,474,464 B2
Personnel safety sensing
John Wilson, Bicester (GB); and Grant Nicholls, Hampshire (GB)
Assigned to SALUNDA LIMITED, Oxfordshire (GB)
Filed by SALUNDA LIMITED, Oxfordshire (GB)
Filed on Nov. 10, 2022, as Appl. No. 17/984,686.
Application 17/984,686 is a continuation of application No. 17/270,108, previously published as PCT/GB2019/052263, filed on Aug. 12, 2019.
Claims priority of application No. 1813975 (GB), filed on Aug. 28, 2018; application No. 1817474 (GB), filed on Oct. 26, 2018; application No. 1902010 (GB), filed on Feb. 14, 2019; application No. 1903818 (GB), filed on Mar. 20, 2019; and application No. 1908632 (GB), filed on Jun. 17, 2019.
Prior Publication US 2023/0071988 A1, Mar. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 13/76 (2006.01); G01S 5/02 (2010.01); G01S 13/02 (2006.01); G01S 13/87 (2006.01); G01S 13/88 (2006.01)
CPC G01S 13/765 (2013.01) [G01S 5/02 (2013.01); G01S 13/0209 (2013.01); G01S 13/876 (2013.01); G01S 13/886 (2013.01); G01S 2205/09 (2020.05)] 19 Claims
OG exemplary drawing
 
1. A safety sensing method for a person in an industrial environment, the method comprising:
providing a personnel locator device for location on a person and a reference system comprising a plurality of nodes located at predetermined locations in the industrial environment;
transmitting radio ranging signals between the nodes and the personnel locator device;
deriving measurements of timings of the radio ranging signals between the nodes and the personnel locator device;
calculating the location of the personnel locator device within the industrial environment based on the measurements of the timings of the radio ranging signals between the nodes and the personnel locator device and reference information representing the predetermined locations of the nodes;
receiving control information associated with a piece of equipment, located in the industrial environment, wherein a danger zone associated with the piece of equipment is defined in dependence on the control information; and
determining if the calculated location of the personnel locator device is within the danger zone.