Biometric monitoring devices, including various technologies that may be implemented in such devices, are discussed herein. Additionally, techniques for utilizing gyroscopes in biometric monitoring devices are provided. Such techniques may, in some implementations, involve obtaining swimming metrics regarding stroke cycle count, lap count, and stroke type. Such techniques may also, in some implementations, involve obtaining performance metrics for bicycling activities.

Biometric monitoring devices, including various technologies that may be implemented in such devices, are discussed herein. Additionally, techniques for utilizing gyroscopes in biometric monitoring devices are provided. Such techniques may, in some implementations, involve obtaining swimming metrics regarding swim stroke count, lap count, and stroke type. A biometric monitoring device for obtaining such metrics may include an immersions sensor.

A sensor module includes a first substrate, a second substrate, a connection portion, a first sensor device, and a second sensor device. The connection portion forms an electrical connection between the first substrate and the second substrate. The first sensor device is disposed on the first substrate to detect a physical quantity on a first axis. The second sensor device is disposed on the second substrate to detect a physical quantity on the first axis.

The invention relates to a device (100) for measuring the angular errors in the inclination of a real axis of rotation (204) of a rotary element (101), the device comprising control electronics (111) controlling the rotation of the rotary element (101) about its real axis of rotation (204), a first and a second rotation sensor (112a, 112b) for obtaining angular velocities about two measurement axes (302, 304) which are orthogonal to one another and both orthogonal to the real axis of rotation (204), a third rotation sensor (112c) making it possible to obtain the angular position and angular velocity of the rotation element (101) about its real axis of rotation (204), at least two of the aforementioned sensors being inertial sensors making it possible to obtain projections of the vector of the speed of rotation of the Earth onto at least two axes of projection, an acquisition unit (113), a measurements-storage memory (114), a computation unit (115) configured to compute, from the angular positions and velocities obtained from the aforesaid sensors, the angular errors in the inclination of the real axis of rotation (204) of the rotary element (101).

A gyro sensor includes a resonator and a control unit that executes drive control of the resonator. The control unit includes a PLL, an AGC, a detection gain ratio corrector and a drive gain ratio corrector. The detection gain ratio corrector corrects a detection gain ratio between a gain of a first detection signal from a first detection electrode that detects vibration of the resonator on the x axis and a gain of a second detection signal from a second detection electrode that detects vibration of the resonator on the y axis. The drive gain ratio corrector corrects a drive gain ratio between a gain of a first drive signal to a first drive electrode for vibrating the resonator in the first vibration mode and a gain of a second drive signal to a second drive electrode for vibrating the resonator in the second vibration mode.

The invention relates to the field of microelectromechanical systems (MEMS) gyroscopes. The MEMS gyroscope of the present invention drives oscillation of at least one proof mass in a primary drive mode at a first frequency and in a secondary drive mode at a second frequency, different to the first frequency. The primary drive mode and secondary drive mode are orthogonal. Sense circuitry measures oscillation of the at least one proof mass in a sense mode, which is orthogonal to the primary drive mode and the secondary drive mode, in order to determine the angular rate of rotation of the MEMS gyroscope about sense axes parallel to the movement of the at least one proof mass in the primary and secondary drive modes.

A sensor apparatus according to the present embodiment incudes: a mechanism configured to rotate a rotation system around a rotation axis and is provided with an accelerometer having an axis that is not parallel to either a plane perpendicular to the rotation axis or the rotation axis; and a processor configured to acquire an acceleration measured by the accelerometer in response to rotation angles of three or more points of the rotation system rotated, separate the acceleration into a first component that follows the rotation of the rotation system and a second component that does not follow the rotation of the rotation system, and estimate an inclination angle of the rotation system based on the first component and the second component.

The present invention relates to a gyroscopic measurement method by means of a sensor (10) comprising a housing (12) and a vibrating element (15) able to vibrate relative to the housing (12) simultaneously according to a direction (x) of a pilot mode and a direction (y) of a detection mode, comprising the control (110) of a first and a second vibration amplitude of the vibrating element (15) according to the directions of the pilot mode and detection mode respectively to a predetermined pilot amplitude (x.sub.max) and detection amplitude (y.sub.max), and the determination (120) of an instantaneous angular speed (.sub.mes) of the housing (12).

A predetermined bias ((t)) is introduced into a measurement of an angular position () of the direction (x) of the pilot mode used to determine a biased force (F.sub.ass,bias) to be exerted on the vibrating element (15) for the control of the first and/or second vibration amplitude, to cause controlled rotation of the direction (x) of the pilot mode in the plane of vibration (XY).

A positioning device includes an camera, a detector, and a circuit. The camera is mounted on a moving body, and captures an image of surroundings of the moving body to acquire a captured image. The detector is mounted on the moving body, detects motion of the moving body, and outputs a detection signal indicating a detection result. The circuit processes the detection signal using a correction value for correcting a bias error included in the detection signal without depending on the motion of the moving body. The circuit computes the position of the moving body based on the captured image acquired by the camera and the detection signal processed. If the circuit determines that the moving body is stationary, the circuit updates the correction value of the bias error based on the detection signal output by the detector.

A sensor unit having a coupling-in waveguide and a coupling-in unit which couples a state present on the coupling-in waveguide to a first waveguide and a second waveguide. The sensor unit includes a first coupling-out unit that couples in a state present on the first waveguide to a coupling waveguide and couples out a state present on the coupling waveguide to a first coupling-out waveguide. The sensor unit includes a second coupling-out unit which couples in a state present on the second waveguide to the coupling waveguide and couples out a state present on the coupling waveguide to a second coupling-out which couples with the coupling waveguide, and a detection unit including at least one detector for detecting states present at or output from the at least first and/or second coupling-out waveguide or states dependent on these states.