# US 2026/0296541 A1 · Method for Detecting Angle in a Steering System > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0296541 A1 - Document ID: US20260296541A1 - Status: Published application - Kind: A1 - Application number: 19/199,428 - Filed: 2025-05-06 - Published: 2026-10-01 - Earliest claimed: 2025-04-01 - Assignees: Conserve & Associates, Inc. - Applicants: Conserve & Associates, Inc. - Inventors: Teng-Chieh Hsu; Tseng-Jen Su; Shih-Ming Lin - Web page: https://patentgrep.com/patent/US20260296541A1 ## CPC - B62D 15/0225: {by measuring on a steering gear element, e.g. on a rack bar} - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) ## Abstract A steering system angle sensing method addresses the issue of requiring a single-sided SN bipolar magnet's installation direction to be at 0° magnetic field, which involves setting up a magnetic angle sensor to detect the magnetic field angle from at least one magnet on a rotating component or driven gear, outputting an absolute angle value. After initialization, the first absolute angle is recorded as the starting angle. The current relative angle is calculated based on the relationship between the current and starting absolute angles, determining the rotation direction and number of turns. Using the relative angle, direction, and turns, the precise rotation angle and direction of the main rotating component or gear are computed. If the system starts with the component not at 0°, it retrieves stored rotation data from the last shutdown, applying offset compensation to correct the angle. This method eliminates consideration of magnet installation direction, enhancing flexibility. ## Claims ### Claim 1 A steering system angle sensing method for sensing the rotation of one or more rotating components in a steering system, wherein each of the one or more rotating components is configured with a magnet, and the steering system comprises: a main gear, connected to a steering shaft; one or more driven gears, respectively meshing with the main gear; one or more magnets, respectively disposed on the one or more driven gears; one or more magnetic angle sensors, respectively configured to sense the magnetic field angles generated by the one or more magnets and output one or more absolute angle values; a processing unit; and a storage unit, coupled to the processing unit, storing program code that instructs the processing unit to execute the steering system angle sensing method, enabling the sensing of the rotation of the one or more rotating components or driven gears using the one or more magnetic angle sensors, the steering system angle sensing method comprising the steps of: recording one or more first sets of absolute angle values between 0 and 360 degrees output by the one or more magnetic angle sensors after completing an initialization procedure as one or more starting absolute angles; calculating one or more current relative angle values based on the relationship between the one or more current absolute angle values measured by the one or more magnetic angle sensors and the one or more starting absolute angles; determining a rotation direction of the one or more rotating components or the one or more driven gears based on the one or more current relative angle values and their respective at least one set of previous relative angle values; determining a number of turns of the one or more rotating components or the one or more driven gears based on the positional changes of the one or more current relative angle values and their respective at least one set of previous relative angle values relative to a plurality of preset quadrants; and calculating and determining an actual rotation angle, direction, and a number of turns of the main gear meshed with the one or more rotating components or the one or more driven gears based on at least one of the one or more current relative angle values, the rotation direction of the one or more rotating components or the one or more driven gears, and the number of turns of the one or more rotating components or the one or more driven gears. ### Claim 2 (depends on 1) The steering system angle sensing method according to claim 1, wherein the step of calculating the one or more current relative angle values based on the relationship between the one or more current absolute angle values measured by the one or more magnetic angle sensors and the one or more starting absolute angles comprises: if the one or more current absolute angle values are greater than or equal to the one or more starting absolute angles and less than or equal to 360 degrees, determining that the one or more current relative angle values equal the one or more current absolute angle values minus the one or more starting absolute angles; and if the one or more current absolute angle values are less than the one or more starting absolute angles, determining that the one or more current relative angle values equal the one or more current absolute angle values plus 360 degrees minus the one or more starting absolute angles. ### Claim 3 (depends on 1) The steering system angle sensing method according to claim 1, wherein the step of determining the rotation direction of the one or more rotating components or the one or more driven gears based on the one or more current relative angle values and their respective at least one set of previous relative angle values comprises determining the respective current rotation direction states of the one or more rotating components or the one or more driven gears based on the previous rotation direction states of the one or more rotating components or the one or more driven gears and the relationship between their respective current absolute angle values and starting absolute angles, and includes: if the one or more current relative angle values equal their respective previous relative angle values, determining that the one or more rotating components or the one or more driven gears are in a stationary state; if the one or more current relative angle values exceed their respective previous relative angle values, determining, according to the definition of generalized trigonometric functions, that the one or more rotating components or the one or more driven gears are rotating toward the first quadrant or counterclockwise; and if the one or more current relative angle values are less than their respective previous relative angle values, determining, according to the definition of generalized trigonometric functions, that the one or more rotating components or the one or more driven gears are rotating toward the fourth quadrant or clockwise. ### Claim 4 (depends on 1) The steering system angle sensing method according to claim 1, wherein the number of turns includes the number of left turns and the number of right turns, and the step of determining the number of turns of the one or more rotating components or the one or more driven gears based on the positional changes of the one or more current relative angle values and their respective at least one set of previous relative angle values relative to the plurality of preset quadrants, comprises: recording the sequence of the one or more current relative angle values and their respective at least one set of previous relative angle values relative to the plurality of preset quadrants; accumulating the number of turns when the one or more current relative angle values and their respective at least one set of previous relative angle values completely traverse the plurality of preset quadrants in sequence; and resetting the number of turns and the number of right turns when the number of left turns equals the number of right turns. ### Claim 5 (depends on 1) The steering system angle sensing method according to claim 1, wherein the plurality of preset quadrants include a first quadrant, a second quadrant, a third quadrant, and a fourth quadrant, where the first quadrant ranges from 0 to 90 degrees for the one or more current angle values, the second quadrant ranges from 90 to 180 degrees for the one or more current angle values, the third quadrant ranges from 180 to 270 degrees for the one or more current angle values, and the fourth quadrant ranges from 270 to 360 degrees for the one or more current angle values. ### Claim 6 (depends on 1) The steering system angle sensing method according to claim 1, further comprising: recording the one or more first sets of absolute angle values between 0 and 360 degrees output by the one or more magnetic angle sensors after completing the initialization procedure and their respective converted initial relative angle values, and comparing them with the one or more relative angle values converted from the one or more absolute angle values currently sensed by the one or more magnetic angle sensors to determine one or more angle offset values; and reading the one or more initial absolute angle values stored in the storage device and the respective initial relative angle values converted from the one or more first sets of absolute angle values between 0 and 360 degrees output by the one or more magnetic angle sensors after completing the initialization procedure, and performing compensation calculations for the angle offset values, to correct the rotation angles of the one or more rotating components or the one or more driven gears. ### Claim 7 (depends on 1) The steering system angle sensing method according to claim 1, wherein the one or more rotating components are one or more driven gears. ### Claim 8 (depends on 1) The steering system angle sensing method according to claim 1, wherein the step of determining the rotation of the main gear based on the one or more relative angle values, the rotation direction of the one or more driven gears, and the number of turns of the one or more driven gears comprises: determining the rotation ratio relationship of the one or more driven gears relative to the main gear based on the gear ratio of the main gear relative to the one or more driven gears; and converting the one or more relative angle values, the rotation direction of the one or more driven gears, and the number of turns of the one or more driven gears into the rotation angle, rotation direction, and number of turns of the main gear based on the rotation ratio relationship. ### Claim 9 (depends on 8) The steering system angle sensing method according to claim 8, wherein the steering shaft is connected to a steering wheel. ### Claim 10 (depends on 9) The steering system angle sensing method according to claim 9, wherein the steering system angle sensing method further comprises converting the rotation of the main gear into the steering angle of the steering wheel. ### Claim 11 (depends on 1) The steering system angle sensing method according to claim 1, further comprising at least one redundant driven gear, at least one redundant magnet, and at least one redundant magnetic angle sensor, configured to replace faulty components when one or more of the one or more driven gears, the one or more magnets, and the one or more magnetic angle sensors fail.