# US 11,136,788 B2 · Door improvements and data mining via accelerometer and magnetometer electronic component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,136,788 B2 - Document ID: US11136788B2 - Status: Granted - Kind: B2 - Application number: 16/373,249 - Filed: 2019-04-02 - Published: 2019-10-31 - Granted: 2021-10-05 - Earliest claimed: 2015-06-01 - Assignees: Schlage Lock Company LLC - Applicants: Schlage Lock Company LLC - Inventors: Brian A. Telljohann; Ryne Rayburn; Matthew R. Dexter; Gregory Ross; John Evenson - Web page: https://patentgrep.com/patent/US11136788B2 ## CPC - E05B 41/00: Locks with visible indication as to whether the lock is locked or unlocked {(indicator lights E05B17/10)} - G08B 13/08: by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind - E05B 2045/063: {by movement of the wing} - E05B 2045/067: {Switches triggered by inertia} - E05B 2047/0068: {Door closed} - E05B 2047/0094: {Mechanical aspects of remotely controlled locks} - E05B 2063/0095: {Locking devices actuated or controlled by seismic activity, e.g. earthquakes} - E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS ## Abstract An electronic door lock including a magnetometer, an accelerometer, and a processor. The processor is configured to determine a status of a door with respect to a door frame using data provided by the accelerometer and magnetometer which collectively generate acceleration data, velocity data and positional data of the door. The processor provides data to a user interface or an alert device indicating one or more of: door open angle, prep-less door position, an acceleration alert, a door position alert, door sag, door frame rub, and triangulation of an intruder. ## Claims ### Claim 1 A method for determining a status of a door with respect to a passageway, the method comprising: providing at least one sensor in a door lock; analyzing sensor data of the door generated by the at least one sensor; determining whether one or more operating state thresholds are satisfied based on the sensor data, wherein the one or more operating state thresholds indicate that the door is operating in an acceptable operating state when the one or more operating state thresholds are satisfied based on the sensor data thereby indicating that the door is opening and/or closing without a change in direction of door acceleration, and the one or more operating state thresholds indicate that the door is operating in an unacceptable operating state when at least one of the operating state thresholds is unsatisfied based on the sensor data thereby indicating that the door is opening and/or closing with a change in direction of door acceleration; and providing a status of the door with respect to the passageway signifying whether the door is operating in the unacceptable operating state thereby indicating that that the door is opening and/or closing with a change in direction of door acceleration or the acceptable operating state thereby indicating that the door is opening and/or closing without a change in direction of door acceleration. ### Claim 2 (depends on 1) The method of claim 1, wherein providing the status of the door comprises providing an alert indicating that an unacceptable condition associated with operation of the door exists when the door is operating in the unacceptable operating state. ### Claim 3 (depends on 1) The method of claim 1, further comprising determining a magnetic field value generated by a magnetometer when the door is in a closed position relative to the passageway; and wherein providing the alert signal comprises providing an alert signal in response to a determination that magnetometer data is different from the magnetic field value determined when the door is in the closed position relative to the passageway. ### Claim 4 (depends on 1) The method of claim 1, further comprising calibrating a magnetometer by determining a first reference magnetic field sensed by the magnetometer when the door is positioned in a closed state. ### Claim 5 (depends on 4) The method of claim 4, wherein calibrating the magnetometer further comprises determining a second reference magnetic field sensed by the magnetometer when the door is positioned in at least one opened state. ### Claim 6 (depends on 1) The method of claim 1, wherein determining the door is operating in an unacceptable operating state comprises detecting one of a propped door state or a forced door condition. ### Claim 7 (depends on 1) The method of claim 1, wherein determining the door is operating in an unacceptable operating state comprises detecting the door has sagged relative to an installation position of the door. ### Claim 8 (depends on 1) The method of claim 1, wherein determining the door is operating in an unacceptable operating state comprises determining the door is positioned at a nonzero angle relative to the passageway for at least a threshold period of time. ### Claim 9 An electronic door lock for a door that secures a passageway, the lock comprising: at least one sensor configured to generate sensor data; and a processor configured to execute stored program instructions to: determine whether one or more operating state thresholds are satisfied based on the sensor data, wherein the one or more operating state thresholds indicate that the door is operating in an acceptable operating state when the one or more operating state thresholds are satisfied based on the sensor data thereby indicating that the door is opening and/or closing without a change in direction of door acceleration, and the one or more operating state thresholds indicate that the door is operating in an unacceptable operating state when at least one of the operating state thresholds is unsatisfied based on the sensor data thereby indicating that the door is opening and/or closing with a change in direction of door acceleration; and provide a status of the door with respect to the passageway indicative of whether the door is operating in the unacceptable operating state thereby indicating that the door is not opening and/or closing with a change in direction of door acceleration or the acceptable operating state thereby indicating that the door is opening and/or closing without a change in direction of door acceleration. ### Claim 10 (depends on 9) The electronic door lock of claim 9, wherein the processor is further configured to provide an alert indicating that an unacceptable condition associated with operation of the door exists when the door is operating in the unacceptable operating state. ### Claim 11 (depends on 9) The electronic door lock of claim 9, wherein the processor is further configured to: determine a magnetic field value generated by a magnetometer when the door is in a closed position relative to the passageway to provide magnetometer data; and provide a signal in response to a determination that the magnetometer data is different from the magnetic field value determined when the door is in the closed position relative to the passageway. ### Claim 12 (depends on 9) The electronic door lock of claim 9, wherein the processor is further configured to determine whether a second set of one or more operating state thresholds are satisfied based on the sensor data, wherein the second set of one or more operating state thresholds indicate that the door is operating in an acceptable operating state when the second set of one or more operating state thresholds are satisfied based on the sensor data, and the second set of one or more operating state thresholds indicate that the door is operating in an unacceptable operating state when at least one of the second set of operating state thresholds is unsatisfied based on the sensor data. ### Claim 13 (depends on 9) The electronic door lock of claim 9, wherein the processor is configured to determine whether the one or more operating state thresholds are satisfied based on sensor data, wherein the one or more operating state thresholds indicate that the door is operating in an acceptable operating state when the one or more operating state thresholds are satisfied based on the sensor data, and the one or more operating state thresholds indicate that the door is operating in an unacceptable operating state when at least one of the operating state thresholds is unsatisfied based on the sensor data. ### Claim 14 (depends on 9) The electronic door lock of claim 9, wherein the at least one sensor includes a magnetometer comprising at least one of a vector magnetometer or a total field magnetometer. ### Claim 15 A method for determining a status of a door, the method comprising: analyzing sensor data related to movement of the door generated by at least one sensor in a door lock; determining whether a plurality of operating state thresholds are satisfied based on the sensor data, wherein each of the operating state thresholds indicates that operation of the door is operating in an acceptable operating state when the plurality of operating state thresholds are satisfied based on the sensor data thereby indicating that the door is opening and/or closing without a change in direction of door acceleration, and that operation of the door is operating in an unacceptable operating state when at least one of the plurality of operating state thresholds fails to be satisfied based on the sensor data thereby indicating that the door is opening and/or closing with a change in direction of door acceleration; and providing a status of the door with respect to the opening signifying whether the door is operating in the unacceptable operating state thereby indicating that the door is opening and/or closing with a change in direction of door acceleration or the acceptable operating state thereby indicating that the door is opening and/or closing without a change in direction of door acceleration. ### Claim 16 (depends on 15) The method of claim 15, wherein the at least one sensor includes a magnetometer. ### Claim 17 (depends on 15) The method of claim 15, wherein the at least one sensor comprises an accelerometer and the sensor data comprises accelerometer data. ### Claim 18 (depends on 15) The method of claim 15, wherein the at least one sensor comprises a magnetometer and an accelerometer, and the sensor data comprises magnetometer data and accelerometer data. ### Claim 19 (depends on 15) The method of claim 15, wherein providing the status of the door comprises providing an alert indicating that an unacceptable condition associated with operation of the door exists when the door is operating in the unacceptable operating state. ### Claim 20 (depends on 15) The method of claim 15, wherein determining the door is operating in an unacceptable operating state comprises detecting at least one of a propped door state, a forced door condition, door sag relative to an installation position of the door, a tailgate condition, or a frame rub condition. ### Claim 21 A method for determining a status of a door with respect to a passageway, the method comprising: providing a magnetometer in a door lock; analyzing magnetometer data of the door generated by the magnetometer; determining whether one or more operating state thresholds are satisfied based on the magnetometer data, wherein the one or more operating state thresholds indicate that the door is operating in an acceptable operating state when the one or more operating state thresholds are satisfied based on the magnetometer data, and the one or more operating state thresholds indicate that the door is operating in an unacceptable operating state when at least one of the operating state thresholds is unsatisfied based on the magnetometer data thereby indicating that the door is in a propped state or a forced door condition; and providing a status of the door with respect to the passageway signifying whether the door is operating in the unacceptable operating state thereby indicating that the door is in the propped state or the forced door condition or the acceptable operating state. ### Claim 22 An electronic door lock for a door that secures a passageway, the lock comprising: a magnetometer configured to generate magnetometer data based on a sensed magnetic field; and a processor configured to execute stored program instructions to: determine whether one or more operating state thresholds are satisfied based on the magnetometer data, wherein the one or more operating state thresholds indicate that the door is operating in an acceptable operating state when the one or more operating state thresholds are satisfied based on the magnetometer data, and the one or more operating state thresholds indicate that the door is operating in an unacceptable operating state when at least one of the operating state thresholds is unsatisfied based on the magnetometer data thereby indicating that the door has sagged relative to an installation position of the door; and provide a status of the door with respect to the passageway indicative of whether the door is operating in the unacceptable operating state thereby indicating that the door has sagged relative to the installation position of the door or the acceptable operating state. ### Claim 23 A method for determining a status of a door, the method comprising: analyzing sensor data related to movement of the door generated by at least one sensor in a door lock; determining whether a plurality of operating state thresholds are satisfied based on the sensor data, wherein each of the operating state thresholds indicates that operation of the door is operating in an acceptable operating state when the plurality of operating state thresholds are satisfied based on the sensor data, and that operation of the door is operating in an unacceptable operating state when at least one of the plurality of operating state thresholds fails to be satisfied based on the sensor data thereby indicating the door is positioned at a nonzero angle relative to the passageway for at least a threshold period of time; and providing a status of the door with respect to the opening signifying whether the door is operating in the unacceptable operating state thereby indicating the door is positioned at the nonzero angle relative to the passageway for at least the threshold period of time or acceptable operating state.