An optical axis control apparatus is provided with a relative-road-surface-angle calculating unit which calculates a relative horizontal plane angle being an inclination angle of a vehicle with respect to a horizontal plane by using an output value of an acceleration sensor provided on the vehicle and calculates a relative road surface angle being an inclination angle of the vehicle with respect to a road surface by integrating an amount of change of the relative horizontal plane angle while the vehicle is stationary, a relative-road-surface-angle correcting unit which obtains braking information indicating an operation state of a brake device provided on the vehicle and corrects the relative road surface angle for a change in the braking information, and an optical axis control unit which controls an optical axis of headlights provided on the vehicle using the relative road surface angle corrected by the relative-road-surface-angle correcting unit.

Disclosed herein are systems and methods for calculating angular acceleration based on inertial data using two or more inertial measurement units (IMUs). The calculated angular acceleration may be used to estimate a position of a wearable head device comprising the IMUs. Virtual content may be presented based on the position of the wearable head device. In some embodiments, a first IMU and a second IMU share a coincident measurement axis.

A spool brake device for a fishing reel includes an electric spool brake, a rotation detector, and a controller. The rotation detector detects a rotation of the spool. The controller calculates a rotational velocity of the spool based on the rotation of the spool, determines whether the fishing reel is in a casting state based on the rotational velocity, controls the spool brake to brake the spool upon a determination that the fishing reel is in the casting state, and controls the spool brake to not brake the spool upon a determination that the fishing reel is not in the casting state.

A method for contactlessly determining an exact passage of an athlete at points placed along a track in sports, wherein the method comprises gearing the athlete with a wearable magnetometer sensor unit, whereby the magnetometer sensor unit is equipped with at least a magnetic sensor, a processing unit, and a storage medium; placing at each point at least a permanent magnet in proximity of a track surface of the track. When the athlete moves along the track, the method further comprises recording at the magnetic sensor a signal; detecting for each permanent magnet a disturbance of a local magnetic field generated by the permanent magnet in the recorded signal and measuring the disturbance; mapping of the measured disturbance to a movement speed of the athlete and a distance of the athlete to the magnet corresponding to the local magnetic field; and correcting the movement speed and the distance for a time offset between the magnet passage of an athlete's center of mass and the magnetometer sensor unit.

Disclosed herein are systems and methods for calculating angular acceleration based on inertial data using two or more inertial measurement units (IMUs). The calculated angular acceleration may be used to estimate a position of a wearable head device comprising the IMUs. Virtual content may be presented based on the position of the wearable head device. In some embodiments, a first IMU and a second IMU share a coincident measurement axis.

A jack leveling apparatus utilizes a Hall effect sensor to determine a rate of movement of the jack leveling apparatus. The rate of movement is correlated to loading or unloading of the jack level device. When a load is applied to the jack level, the rate of movement will slow while alternatively, if a load is removed, the rate of movement will increase. Utilizing these values, the controller may also determine the position of the leg of the jack level device.

A system for testing a pitot probe heating element includes first and second probes, measuring signals selected from a first signal representing a differential electric current between supply and return wires of the heating element, a second signal representing a residual voltage with respect to ground in the heating element, and a third signal representing ambient electric fields with respect to ground in the heating element; a signal acquisition component that selectively and sequentially applies a test voltage to the heating element to generate the selected signals and receives the selected signals measured by the first and second probes; a signal processing component that receives the selected ones of the first, second, and third signals, processes them, and extracts measurements from the data to generate results indicative of a condition of the heating element; a device control component that generates a display; and a display component.

A measuring system having a measuring tool with a probe body and an optical marker, a camera for recording image data of the measuring tool, and an evaluation and control unit which is configured to evaluate the image data recorded by the camera and use the image data for determining, with the aid of the optical marker, position data of the probe body which contain the spatial position coordinates of the probe body. The evaluation and control unit is further configured to calculate speed data and/or acceleration data of the probe body from the position data of the probe body and to determine, on the basis of the speed data and/or acceleration data of the probe body, whether or not probing is present in which the probe body makes contact with a measurement object for the purpose of capturing a measuring point.

The present invention relates to a track assembly for a tracked vehicle, which, particularly, comprises: a support shaft disposed to be orthogonal to a traveling direction of a work body; a connecting collar for connecting the support shaft to the work body while supporting both ends of the support shaft; a rotary roller fitted on the outer periphery of the support shaft and rotating while supporting the inner peripheral surface of a track; a first detection unit disposed between the support shaft and the rotary roller to measure the number of rotations of the rotary roller or the acceleration thereof; a second detection unit for measuring the temperature of a lubricant applied between the support shaft and the rotary roller; a third detection unit disposed on the rotary roller to measure a wear state of the rotary roller; and a communication unit for communicating, to the outside, a result value measured by the first detection unit or the third detection unit. Therefore, the track assembly can improve the efficiency and reliability of work.

An inertial sensor apparatus includes: a base substrate; and a stacked body bonded to the base substrate by a first junction. The stacked body includes: a first inertial sensor that outputs a first detection signal in accordance with an inertial force; a processing circuit that drives the first inertial sensor and that processes the first detection signal; and a second junction that is positioned between the first inertial sensor and the processing circuit and that bonds the first inertial sensor to the processing circuit. A thermal conductivity of the second junction is higher than a thermal conductivity of the first junction.