US 11,675,027 B2
Multi-channel magnetic sensor device
Zenon Szulyk, Fort Collins, CO (US); David M. Thunga, Fort Collins, CO (US); Kirill Goldin, Fort Collins, CO (US); and Kevin Spahr, Fort Collins, CO (US)
Assigned to Woodward, Inc., Fort Collins, CO (US)
Filed by Woodward, Inc., Fort Collins, CO (US)
Filed on Dec. 27, 2019, as Appl. No. 16/728,886.
Prior Publication US 2021/0199731 A1, Jul. 1, 2021
Int. Cl. G01R 33/07 (2006.01); G01D 5/14 (2006.01); G01R 33/09 (2006.01); G01R 15/20 (2006.01)
CPC G01R 33/072 (2013.01) [G01D 5/145 (2013.01); G01R 15/202 (2013.01); G01R 15/207 (2013.01); G01R 33/09 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A contactless potentiometer device comprising:
a first sensor mounted on a first substrate;
a second sensor mounted on a second substrate, the first sensor and the first substrate being physically and electrically isolated from the second sensor and the second substrate, each sensor configured to measure change in a magnetic field, wherein each sensors comprises one or more electrically isolated output channels to provide an output signal to a control circuit corresponding to the change in the magnetic field, wherein each sensor includes a magnetic sensor circuit having an independent differential input with respect to a reference input, and an independent differential output with respect to a reference output to provide a signal to a respective electrically isolated output channel; and
a ring magnet positioned a first distance from the first sensor and a second distance from the second sensor, such that each of the sensors are coaxially aligned with a central magnetic axis of the magnetic field and within range of the magnetic field from the magnet.