# US 2013/0154619 A1 · System for positional measurement in a coupling device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0154619 A1 - Document ID: US20130154619A1 - Status: Published application - Kind: A1 - Application number: 13/806,768 - Filed: 2011-06-30 - Published: 2013-06-20 - Earliest claimed: 2010-06-30 - Assignees: Elos Fixturlaser AB - Inventors: Clas Kron; Peter Sandstrom; Peter Stromberg - Web page: https://patentgrep.com/patent/US20130154619A1 ## CPC - G01B 7/31: for testing the alignment of axes - F16D 3/50: with the coupling parts connected by one or more intermediate members (F16D3/16 takes precedence) - F16D 2300/18: Sensors; Details or arrangements thereof - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES ## Abstract The present invention relates to a system (S) for measuring the position of a coupling member (1) that comprises a shaft part (2), a first flange (3), a second flange (4) and a first resilient bushing (5), which secures the first flange (3) to the shaft part (2), and a second resilient bushing (6), which secures the second flange (4) to the shaft part (2). Each resilient bushing (5, 6) is arranged with a resilient yield between the respective flange (3, 4) and the shaft part (2). The flanges (3, 4) are intended to be secured to a respective first shaft (7) and second shaft (8). When the coupling member (1) is placed between the first shaft (7) and the second shaft (8), it is intended to transfer a rotation movement from the first shaft (7) to the second shaft (8). The system (S) further comprises at least a first head unit (9) mounted on a first fixture (10), where the first fixture (10) is designed to be mounted between the first flange (3) and the shaft part (2) via existing mounting elements for the first resilient bushing (5). The fixture comprises at least one sensor (15) arranged for position measurement between the first flange (3) and the shaft part (2). ## Claims ### Claim 1 System for measuring the position of a coupling member, where the coupling member comprises a shaft part, a first flange and a second flange, where the coupling member further comprises a first resilient bushing, which secures the first flange to the shaft part, and a second resilient bushing, which secures the second flange to the shaft part, where each resilient bushing is arranged with a resilient yield between the respective flange and the shaft part, where the first flange is intended to be secured to a first shaft and the second flange is intended to be secured to a second shaft, and the coupling member when placed between the first shaft and the second shaft, is intended to transfer a rotation movement from the first shaft to the second shaft, where the system further comprises at least a first head unit mounted on a first fixture, wherein the first fixture is designed to be mounted between the first flange and the shaft part via existing mounting elements for the first resilient bushing, where said fixture comprises at least one sensor arranged for position measurement between the first flange and the shaft part. ### Claim 2 (depends on 1) System according to claim 1, wherein the measurement of the position of the coupling member comprises measuring the alignment of the coupling member. ### Claim 3 (depends on 1) System according to claim 1, wherein the measurement of the position of the coupling member comprises measuring a change of position in the rotation direction of at least one of the shafts. ### Claim 4 (depends on 1) System according to claim 1, further comprising a second head unit mounted on a second fixture, where the second fixture is designed to be mounted between the second flange and the shaft part via existing mounting elements for the second resilient bushing, where said fixture comprises at least one sensor arranged for position measurement between the second flange and the shaft part. ### Claim 5 (depends on 1) System according to claim 1, wherein each fixture is designed, in the mounted state, to bear at least partially on one of either the respective flange or the shaft part. ### Claim 6 (depends on 1) System according to claim 1, wherein each fixture comprises a central hub with at least two spokes extending radially from the central hub, where each head unit is designed to be mounted on said hub. ### Claim 7 (depends on 6) System according to claim 6, wherein each sensor is designed to be placed on at least one corresponding spoke. ### Claim 8 (depends on 1) System according to claim 1, further comprising, for each fixture, at least one weight, which is displaceable along said fixture. ### Claim 9 (depends on 1) System according to claim 1, wherein said sensor is a Hall sensor and is designed to cooperate with a corresponding magnet, where the position measurement takes place between each Hall sensor and corresponding magnet. ### Claim 10 (depends on 9) System according to claim 9, further comprising at least one weight for each magnet. ### Claim 11 System for measuring the position of a coupling member in a wind power plant, where the coupling member comprises a shaft part, a first flange and a second flange, where the coupling member further comprises a first resilient bushing, which secures the first flange to the shaft part, and a second resilient bushing, which secures the second flange to the shaft part, where each resilient bushing is arranged with a resilient yield between the respective flange and the shaft part, where the first flange is intended to be secured to a first shaft and the second flange is intended to be secured to a second shaft, and the coupling member when placed between the first shaft and the second shaft, is intended to transfer a rotation movement from the first shaft to the second shaft, wherein the system comprises means for measuring a first angle (α) between the first flange and the shaft part and a second angle (β) between the second flange and the shaft part. ### Claim 12 (depends on 11) System according to claim 11, further comprising at least a first head unit mounted on a first fixture, wherein the first fixture is designed to be mounted between the first flange and the shaft part via existing mounting elements for the first resilient bushing, where said fixture comprises at least one sensor arranged for position measurement between the first flange and the shaft part. ### Claim 13 System for measuring the position of a coupling member, where the coupling member comprises a shaft part, a first flange and a second flange, where the coupling member further comprises a first resilient bushing, which secures the first flange to the shaft part, and a second resilient bushing, which secures the second flange to the shaft part, where each resilient bushing is arranged with a resilient yield between the respective flange and the shaft part, where the first flange is intended to be secured to a first shaft and the second flange is intended to be secured to a second shaft, and the coupling member, when placed between the first shaft and the second shaft, is intended to transfer a rotation movement from the first shaft to the second shaft, where the system further comprises at least a first head unit mounted on a first fixture, wherein the first fixture is designed to be mounted between the first flange and the shaft part, in that said fixture comprises at least one sensor arranged for position measurement between the first flange and the shaft part, in that the system comprises a second fixture designed to be mounted between the second flange and the shaft part, and in that the first fixture and the second fixture are connected via connecting means. ### Claim 14 (depends on 13) System according to claim 13, wherein the first fixture is arranged between the first flange and the shaft part via existing mounting elements for the first resilient bushing, and in that the second fixture is designed to be mounted between the second flange and the shaft part via existing mounting elements for the second resilient bushing. ### Claim 15 (depends on 13) System according to claim 13, wherein said connecting means extend inside the shaft part (33). ### Claim 16 (depends on 13) System according to claim 13, wherein said connecting means consist of a plurality of rods. ### Claim 17 (depends on 13) System according to claim 13, wherein the measurement of the position of the coupling member comprises measuring the alignment of the coupling member. ### Claim 18 (depends on 13) System according to claim 13, wherein the measurement of the position of the coupling member comprises measuring a change of position in the rotation direction of at least one of the shafts. ### Claim 19 (depends on 13) System according to claim 13, wherein each fixture comprises a sensor. ### Claim 20 (depends on 13) System according to claim 13, wherein the second fixture supports a second head unit and a second sensor for position measurement between the second flange and the shaft part. ### Claim 21 (depends on 13) System according to claim 13, wherein said sensor is a Hall sensor.