公开(公告)号：US10277355B2

公开(公告)日：2019-04-30

申请号：US15627667

申请日：2017-06-20

申请人： FFE Limited

发明人： Jacob Andelin ,  Marcus Perch

IPC分类号： G01S17/88 ,  H04J14/08 ,  G01N21/53 ,  G08B29/18 ,  G06F7/58 ,  G08B17/103 ,  G01N21/3504

摘要： A method for adjusting the timing of beam projections in a beam detector. The method includes projecting a beam for the purpose of detecting obscuration of the beam and, if a level of signal of the beam detected is less than a threshold for each of a number of consecutive projections or for each consecutive projection over a pre-determined time period, initiating a warning, signalling an alarm or otherwise reacting. The method further includes adjusting the timing of projecting the beam from a nominal transmit interval ‘T’ to be within a window time-period ‘W’ extending from an amount before to an amount after the nominal transmit interval ‘T’.

公开(公告)号：US10365161B2

公开(公告)日：2019-07-30

申请号：US15624088

申请日：2017-06-15

申请人： FFE Limited

发明人： Jacob Andelin ,  Gareth Dibden ,  Marcus Perch

IPC分类号： G01N21/17 ,  G01J5/08 ,  G08B17/103 ,  G08B29/20 ,  G01B11/24 ,  G01J5/00 ,  G08B17/10 ,  G08B29/18

摘要： A method for aligning a projected beam on a reflector in a reflective-type beam detector, the method including adjusting the projected beam so as to: project on to substantially all, if not all, of a reflective surface of the reflector; or project on to at least a portion of a reflective surface of the reflector until a constant, or within a predetermined threshold of a constant, signal is received from the reflector; and detecting one or more edges of the reflective surface of the reflector and thereby: centering the projected beam, so as to align an approximate center of the projected beam on, or within a predetermined threshold of, an approximate center of the reflective surface of the reflector; and/or determining a shape or profile of the reflector.

公开(公告)号：US20170363476A1

公开(公告)日：2017-12-21

申请号：US15624088

申请日：2017-06-15

申请人： FFE Limited

发明人： Jacob Andelin ,  Gareth Dibden ,  Marcus Perch

IPC分类号： G01J5/08 ,  G01B11/24 ,  G01J5/00 ,  G08B29/18 ,  G08B17/10

CPC分类号： G01J5/0896 ,  G01B11/24 ,  G01J5/0803 ,  G01J2005/0048 ,  G08B17/10 ,  G08B17/103 ,  G08B29/18 ,  G08B29/20

摘要： A method for aligning a projected beam on a reflector in a reflective-type beam detector, the method including adjusting the projected beam so as to: project on to substantially all, if not all, of a reflective surface of the reflector; or project on to at least a portion of a reflective surface of the reflector until a constant, or within a predetermined threshold of a constant, signal is received from the reflector; and detecting one or more edges of the reflective surface of the reflector and thereby: centering the projected beam, so as to align an approximate center of the projected beam on, or within a predetermined threshold of, an approximate center of the reflective surface of the reflector; and/or determining a shape or profile of the reflector.