公开(公告)号：US20170294805A1

公开(公告)日：2017-10-12

申请号：US15467944

申请日：2017-03-23

申请人： Novanta Corporation

发明人： Paul A. Remillard ,  Andrew M. Goldman ,  Mark Lang

IPC分类号： H02J13/00 ,  H04N21/4363 ,  H04N5/445 ,  H04H60/31 ,  H04B7/185 ,  H04N21/422 ,  H04W52/04

摘要： A communication system that involves superimposing data over DC power. The data takes the form of high bitrate digital signals, where the bitrate is much higher than 0 Hz (DC); this separation allows the AC signal to be easily separated from the DC power. The physical system consists of a two conductor cable, and integration is modular, in that multiple slaves can be connected and disconnected to a master through a routing bus also comprising two conductors. The master can communicate bi-directionally with the slave(s), and the data is encoded using DC-balanced encoding in an FPGA. The data is sent to and from a differential signaling transmitter/receiver pairs at each end of the cable. The system is may be used with position sensors, and provides the benefit of reducing cable costs and sensor size due to the decrease in number of conductors and elimination of power components in the sensor.

公开(公告)号：US10536033B2

公开(公告)日：2020-01-14

申请号：US15467944

申请日：2017-03-23

申请人： Novanta Corporation

发明人： Paul A. Remillard ,  Andrew M. Goldman ,  Mark Lang

IPC分类号： H04W52/04 ,  H04N21/422 ,  H02J13/00 ,  H04B7/185 ,  H04H60/31 ,  H04N5/445 ,  H04N21/4363

摘要： A communication system that involves superimposing data over DC power. The data takes the form of high bitrate digital signals, where the bitrate is much higher than 0 Hz (DC); this separation allows the AC signal to be easily separated from the DC power. The physical system consists of a two conductor cable, and integration is modular, in that multiple slaves can be connected and disconnected to a master through a routing bus also comprising two conductors. The master can communicate bi-directionally with the slave(s), and the data is encoded using DC-balanced encoding in an FPGA. The data is sent to and from a differential signaling transmitter/receiver pairs at each end of the cable. The system is may be used with position sensors, and provides the benefit of reducing cable costs and sensor size due to the decrease in number of conductors and elimination of power components in the sensor.

公开(公告)号：US09933284B2

公开(公告)日：2018-04-03

申请号：US14836021

申请日：2015-08-26

申请人： Novanta Corporation

发明人： Andrew M. Goldman ,  Marc A. Bernard ,  William G. Thorburn

IPC分类号： G01D5/34 ,  G01D5/347

CPC分类号： G01D5/34776 ,  G01D5/34715 ,  G01D5/34792

摘要： An optical position encoder includes a scale having multiple tracks separated in a direction perpendicular to travel, the tracks including an incremental track and an absolute track, the scale interacting with an incident first light beam to generate a second light beam having components carrying respective optical patterns produced by the incremental track and absolute track respectively. The encoder further includes a set of optical detectors including at least first and second detector arrays of differing properties to detect the respective optical patterns produced by the incremental track and absolute track respectively, each of the first and second detector arrays spanning multiple tracks of the scale and configured to respond to a respective detector-specific component of the second light beam more strongly than to another component of the second beam specific to another of the detector arrays.