US 11,668,586 B2
Displacement sensor assembly
Rahimullah Sarban, Brønshøj (DK); Alan Poole, Bække (DK); and Benjamin Thomsen, Aabenraa (DK)
Assigned to ELASTISENSE APS, Aabenraa (DK)
Appl. No. 16/639,135
Filed by ElastiSense ApS, Aabenraa (DK)
PCT Filed Jul. 13, 2018, PCT No. PCT/EP2018/069144
§ 371(c)(1), (2) Date Feb. 14, 2020,
PCT Pub. No. WO2019/034344, PCT Pub. Date Feb. 21, 2019.
Claims priority of application No. PA201770626 (DK), filed on Aug. 18, 2017.
Prior Publication US 2020/0232821 A1, Jul. 23, 2020
Int. Cl. G01D 3/036 (2006.01); G01D 5/241 (2006.01); H05K 1/18 (2006.01); G01B 7/16 (2006.01)
CPC G01D 3/0365 (2013.01) [G01B 7/22 (2013.01); G01D 5/241 (2013.01); H05K 1/18 (2013.01); H05K 2201/09063 (2013.01)] 15 Claims
OG exemplary drawing
 
15. Method of determining displacement between a first fixation part and a second fixation part with a sensor assembly comprising a first mounting device, a second mounting device, a sensor device and a compensation sensor, the compensation sensor arranged to be restricted from mechanical deformation caused by relative displacement between the first fixation part and the second fixation part, the method comprising:
mounting the first mounting device to the first fixation part;
mounting the second mounting device to the second fixation part;
arranging in a sensor cavity a sensing part of the sensor device between the first mounting device and the second mounting device, the sensing part including a plurality of polymeric sensor layers comprising a first dielectric layer, the sensing part comprising a sensing zone;
arranging the compensation sensor comprising a compensation part, in the sensor cavity;
the method further comprising:
obtaining a sensor signal from the sensor device, wherein the sensor signal is indicative of stretching of the sensing zone;
obtaining a compensation signal from the compensation sensor;
determining a displacement parameter based on the sensor signal and the compensation signal.