# US 2018/0023979 A1 · Displacement detection device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0023979 A1 - Document ID: US20180023979A1 - Status: Published application - Kind: A1 - Application number: 15/654,992 - Filed: 2017-07-20 - Published: 2018-01-25 - Earliest claimed: 2016-07-20 - Assignees: Melexis Technologies SA - Applicants: Melexis Technologies SA - Inventors: Takumi YOSHIYA - Web page: https://patentgrep.com/patent/US20180023979A1 ## CPC - G01D 5/20: by varying inductance, e.g. by a movable armature - G01D 5/04: using levers; using cams; using gearing - G01D 5/12: using electric or magnetic means (G01D5/06 takes precedence) - G01D 5/142: {using Hall-effect devices (measuring magnetic variables using Hall-effect or other galvanomagnetic devices G01R33/06)} - G01D 5/145: {influenced by the relative movement between the Hall device and magnetic fields (see G01R33/06)} - G01D 7/08: using a common indicating element for two or more variables - G01D 2205/40: Position sensors comprising arrangements for concentrating or redirecting magnetic flux - G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR ## Abstract Provided is a displacement detection device which can uniquely determine displacement of a detection target from output values based on detection as well as make a displacement range of the detection target wider than a displacement range detectable by a sensor. A displacement detection device includes a magnet which is displaced in a displacement direction Ds, is rod-shaped and has a form in which a longitudinal direction and the displacement direction Ds form a predetermined angle θ, and a sensor IC which detects a magnetic flux density of a magnetic field formed by the magnet in an x direction and a z direction orthogonal to the displacement direction Ds and outputs a signal proportional to the magnetic field detected. ## Claims ### Claim 1 A displacement detection device, comprising: a magnet which is displaced in one direction, is rod-shaped and has a form in which a longitudinal direction and the one direction form a predetermined angle; and a sensor which detects a magnetic flux density of a magnetic field formed by the magnet in at least a direction orthogonal to the one direction and a magnetization direction of the magnet and outputs a signal proportional to the magnetic field detected. ### Claim 2 (depends on 1) The displacement detection device according to claim 1, wherein the sensor comprises: a plurality of magnetic detection elements of which sensitive direction is set to a first direction orthogonal to the one direction; and a magnetic concentrator which converts a magnetic flux in a second direction orthogonal to the one direction and the first direction into a magnetic flux in the first direction. ### Claim 3 (depends on 2) The displacement detection device according to claim 2, wherein the sensor outputs a signal proportional to a magnetic flux density in the first direction by adding outputs of the plurality of the magnetic detection elements and outputs a signal proportional to a magnetic flux density in the second direction by calculating a difference between the outputs of the plurality of the magnetic detection elements. ### Claim 4 (depends on 1) The displacement detection device according to claim 1, wherein the magnet has the magnetization direction in a direction orthogonal to the one direction. ### Claim 5 (depends on 2) The displacement detection device according to claim 2, wherein the magnet has the magnetization direction in a direction orthogonal to the one direction. ### Claim 6 (depends on 3) The displacement detection device according to claim 3, wherein the magnet has the magnetization direction in a direction orthogonal to the one direction. ### Claim 7 A displacement detection device, comprising: a magnet which is displaced in one direction, is rod-shaped and has a form in which a longitudinal direction and the one direction form a predetermined angle; and a sensor which detects a magnetic flux density of a magnetic field formed by the magnet in at least a direction orthogonal to the one direction and a magnetization direction of the magnet and outputs a signal proportional to the magnetic field detected, wherein: the sensor comprises: a plurality of magnetic detection elements of which sensitive direction is set to a first direction orthogonal to the one direction; and a magnetic concentrator which converts a magnetic flux in a second direction orthogonal to the one direction and the first direction into a magnetic flux in the first direction. ### Claim 8 (depends on 7) The displacement detection device according to claim 7, wherein the sensor outputs a signal proportional to a magnetic flux density in the first direction by adding outputs of the plurality of the magnetic detection elements and outputs a signal proportional to a magnetic flux density in the second direction by calculating a difference between the outputs of the plurality of the magnetic detection elements. ### Claim 9 (depends on 7) The displacement detection device according to claim 7, wherein the magnet has the magnetization direction in a direction orthogonal to the one direction. ### Claim 10 (depends on 7) The displacement detection device according to claim 7, wherein the magnet has the magnetization direction in a direction orthogonal to the one direction. ### Claim 11 (depends on 7) The displacement detection device according to claim 7, wherein the magnet has the magnetization direction in a direction orthogonal to the one direction. ### Claim 12 A displacement detection device, comprising: a magnet which is displaced in one direction, is rod-shaped and has a form in which a longitudinal direction and the one direction form a predetermined angle; and a sensor which detects a magnetic flux density of a magnetic field formed by the magnet in at least a direction orthogonal to the one direction and a magnetization direction of the magnet and outputs a signal proportional to the magnetic field detected, wherein: the sensor comprises: a plurality of magnetic detection elements of which sensitive direction is set to a first direction orthogonal to the one direction; and a magnetic concentrator which converts a magnetic flux in a second direction orthogonal to the one direction and the first direction into a magnetic flux in the first direction; and outputs a signal proportional to a magnetic flux density in the first direction by adding outputs of the plurality of the magnetic detection elements and outputs a signal proportional to a magnetic flux density in the second direction by calculating a difference between the outputs of the plurality of the magnetic detection elements. ### Claim 13 (depends on 12) The displacement detection device according to claim 12, wherein the magnet has the magnetization direction in a direction orthogonal to the one direction. ### Claim 14 (depends on 12) The displacement detection device according to claim 12, wherein the magnet has the magnetization direction in a direction orthogonal to the one direction. ### Claim 15 (depends on 12) The displacement detection device according to claim 12, wherein the magnet has the magnetization direction in a direction orthogonal to the one direction.