# US 10,871,409 B2 · SMD-coil-based torque-sensor for tangential field measurement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,871,409 B2 - Document ID: US10871409B2 - Status: Granted - Kind: B2 - Application number: 16/196,972 - Filed: 2018-11-20 - Published: 2019-06-20 - Granted: 2020-12-22 - Earliest claimed: 2017-12-15 - Assignees: GE Avio S.r.l. - Applicants: Ge Avio S.R.L. - Inventors: Pekka Tapani Sipila; Christoph Boeld - Web page: https://patentgrep.com/patent/US10871409B2 ## CPC - G01L 3/102: {involving magnetostrictive means (magnetostrictive sensors H10N35/101)} - G01L 1/125: {by using magnetostrictive means (magnetostrictive sensors H10N35/101)} - G01R 33/0017: {Means for compensating offset magnetic fields or the magnetic flux to be measured; Means for generating calibration magnetic fields} - G01R 33/0094: {Sensor arrays} - G01R 33/028: Electrodynamic magnetometers - G01R 33/09: Magnetoresistive devices - H10N 35/101: {with mechanical input and electrical output, e.g. generators, sensors} - G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR ## Abstract According to some embodiments, system and methods are provided, comprising an installed product including a drive shaft; a magnetostrictive sensor having a sensor probe comprising: a substrate; a drive coil operative to receive a drive current and to emit a magnetic field through the drive shaft, wherein the drive coil is mounted on the substrate; one or more sense coils operative to receive the magnetic field and to transmit a signal based on the received magnetic field, wherein the one or more sense coils are mounted on the substrate; and wherein the magnetic field is emitted from the drive coil in a transverse direction to a radius of the drive shaft. Numerous other aspects are provided. ## Claims ### Claim 1 A system comprising: an installed product including a drive shaft; a magnetostrictive sensor having a sensor probe comprising: a substrate that is positioned on one side of the derive shaft; a drive coil operative to receive a drive current and to emit a magnetic field through the drive shaft, wherein the drive coil is mounted on the substrate; one or more sense coils operative to receive the magnetic field and to transmit a signal based on the received magnetic field, wherein the one or more sense coils are mounted on the substrate; and wherein the magnetic field is emitted from the drive coil in a transverse direction to a radius of the drive shaft. ### Claim 2 (depends on 1) The system of claim 1, wherein the magnetic field is received in a portion of the drive shaft as a vector that is transverse to the radius of the drive shaft. ### Claim 3 (depends on 1) The system of claim 1, wherein a central axis of the drive coil is positioned parallel to the drive shaft. ### Claim 4 (depends on 1) The system of claim 1, wherein the drive coil is positioned centrally on the substrate and the one or more sense coils are mounted on the substrate radially from the drive coil. ### Claim 5 (depends on 1) The system of claim 1, wherein the magnetic field received by the one or more sense coils is different from the magnetic field emitted by the drive coil, based at least in part on a force on the drive shaft. ### Claim 6 (depends on 1) The system of claim 1, wherein the drive shaft is a rotating drive shaft. ### Claim 7 (depends on 1) The system of claim 1, wherein the substrate is a planner substrate. ### Claim 8 (depends on 1) The system of claim 1, wherein the signal is based on a torque of the drive shaft. ### Claim 9 (depends on 1) The system of claim 1, further comprising: a controller including a processor and a memory in communication with the processor, the memory storing program instructions, wherein the processor is operative with the program instructions to perform functions as follows: receiving the signal from the one or more sense coils; and determining, based on the received signal, whether the drive shaft is operating within one or more thresholds. ### Claim 10 (depends on 1) The system of claim 1, wherein the installed product is one of an aircraft, a locomotive, a turbine, or engine. ### Claim 11 A method comprising: providing a magnetostrictive sensor including a drive coil and one or more sense coils, the drive coil being mounted on a substrate and the one or more sense coils being mounted on the substrate wherein the substrate is positioned on one side of the derive shaft; receiving a drive current at the drive coil; emitting, from the drive coil, a magnetic field, wherein the magnetic field is emitted in a transverse direction to a radius of a drive shaft of an installed product; and receiving the magnetic field in the drive shaft and at the one or more sense coils. ### Claim 12 (depends on 11) The method of claim 11, wherein the magnetic field is received in a portion of the drive shaft as a vector that is transverse to the radius of the drive shaft. ### Claim 13 (depends on 11) The method of claim 11, further comprising: positioning a central axis of the drive coil parallel to the drive shaft. ### Claim 14 (depends on 11) The method of claim 11 wherein the drive coil is positioned centrally on the substrate of the magnetostrictive sensor and the one or more sense coils are mounted on the substrate radially from the drive coil. ### Claim 15 (depends on 11) The method of claim 11, wherein the magnetic field received by the one or more sense coils is different from the magnetic field emitted by the drive coil, based at least in part on a force on the drive shaft. ### Claim 16 (depends on 11) The method of claim 11, wherein the drive shaft is a rotating drive shaft. ### Claim 17 (depends on 11) The method of claim 11, wherein the magentostrictive sensor is a torque sensor. ### Claim 18 (depends on 11) The method of claim 11, wherein the signal is based on a torque of the drive shaft. ### Claim 19 (depends on 11) The method of claim 11, further comprising: receiving the signal from the one or more sense coils at a controller; and determining, at the controller, whether the drive shaft is operating within a threshold, based on the received signal. ### Claim 20 A system comprising: an installed product including a drive shaft; a magnetostrictive sensor having a sensor probe comprising: a substrate; a drive coil operative to receive a drive current and to emit a magnetic field through the drive shaft, wherein the drive coil is mounted on the substrate; one or more sense coils operative to receive the magnetic field and to transmit a signal based on the received magnetic field, wherein the one or more sense coils are mounted on the substrate; and wherein the magnetic field is emitted from the drive coil in a transverse direction to a radius of the drive shaft, and wherein the drive coil is positioned centrally on the substrate and the one or more sense coils are mounted on the substrate radially from the drive coil.