摘要:
Systems and methods are disclosed for providing sensor based authentication of a user's identification and may be used to control access. In this manner, a user's identity may be used to control access to any suitable location, space or resource, either locally or remotely. A combination of functions involved in authenticating a user's identification may be performed by one or more discrete devices and include obtaining sensor data from at least one sensor that is physically associated with a user, monitoring to determine that the sensor remains physically associated with the user, authenticating the user's identity using the sensor data and communicating information regarding the user's identification.
摘要:
This disclosure provides techniques for guiding a user through a calibration operation of a mobile device having a motion sensor. The user may receive one or more visual cues to aid the user in positioning the device in one or more desired orientations or patterns of motion. The visual cues may be with respect to a virtual three dimensional environment that is responsive to a determined orientation of the device.
摘要:
Systems and methods are disclosed for calibrating a sensor. A recursive least squares estimation may be performed to update a mean and a covariance matrix for samples of data from a motion sensor and a bias estimate for the motion sensor may be derived from the mean and covariance matrix. The motion sensor may be an gyroscope, an accelerometer or a magnetometer.
摘要:
A state machine may be implemented in hardware by representing each state with one operational code (opcode) such that each opcode may be read from memory in sequential order. The state machine includes a plurality of states linked by at least one transition triggered by data input. The data input may be motion sensor data such that the state machine is configured to recognize a pattern of motion corresponding to a gesture or an activity.
摘要:
Systems and methods are disclosed for determining a navigational constraint for a portable device using an optical sensor. The navigational constraint may be used to supplement other navigational solutions or may be used independently. The optical sensor may capture a plurality of samples to be processed to determine the constraint. Determining the constraint may include any or all of determining a context for usage, distinguishing usage modes, estimating an orientation of the portable device, determining an absolute and/or relative elevation, determining a direction of motion and determining a speed of the portable device from the samples.
摘要:
Systems and methods are disclosed for detecting when a magnetic anomaly may impact the quality of data being output by a magnetometer. A plurality of detection algorithms may be performed in parallel on the sensor data. Further, indication of a anomaly from one or a combination of the detection algorithms may cause the magnetometer data to have a reduced contribution in any sensor fusion operation or may be omitted from a sensor fusion operation as desired.
摘要:
Systems and methods are disclosed for storing a plurality of images with a portable device. Inertial sensor data from a sensor assembly associated with the portable device may be obtained as each image is captured, allowing determination of a motion of the portable device for each image. Each captured image and the corresponding determined motion of the portable device are stored.
摘要:
Systems and methods are disclosed for determining location information for a portable device by identifying interactions indicating proximity between the user and a plurality of items. Each item may be associated with a known location to establish anchor points such that a route traversed by the portable device may be generated from the established anchor points and motion sensor data output by the portable device.
摘要:
This disclosure relates to heading misalignment estimation with a portable device and more specifically to estimating misalignment between a portable device having a sensor assembly and a platform transporting the portable device when the platform is undergoing motion having periodic characteristics. In one aspect, a suitable method includes obtaining inertial sensor data for the portable device and determining an effective frequency characteristic of the inertial sensor data representing the motion having periodic characteristics. The inertial sensor data may be processed using the determined frequency characteristic so that a heading misalignment may be estimated between the heading of the portable device and the platform.
摘要:
Systems and methods are disclosed for determining position information for a mobile device by correlating patterns of data obtained with environmental sensors. A pattern of sensor data associated with an environmental condition may be detected at known location and then matched with a pattern of sensor data detected by the mobile device to determine position information.