Described herein are apparatuses and methods for selectively controlling the application of a fluid to a sensor enclosure such as a camera housing to protect the housing from overheating. An apparatus that includes a protective shield and a conduit such as tubing for supplying a fluid is described. The protective shield is provided so as to protect an exterior surface of the camera housing from heat caused by sun exposure. The tubing includes an inlet for supplying a fluid such as water or air, can extend through or around an exterior of the camera housing, and includes an outlet with one or more nozzles for ejecting the fluid into a space between the protective shield and the camera housing. Sensor data is received from various vehicle sensors to assess the temperature of the housing, the velocity of the vehicle, and so forth to determine when the fluid should be supplied.

Described herein are apparatuses and methods for selectively controlling the application of a fluid to a sensor enclosure such as a camera housing to protect the housing from overheating. An apparatus that includes a protective shield and a conduit such as tubing for supplying a fluid is described. The protective shield is provided so as to protect an exterior surface of the camera housing from heat caused by sun exposure. The tubing includes an inlet for supplying a fluid such as water or air, can extend through or around an exterior of the camera housing, and includes an outlet with one or more nozzles for ejecting the fluid into a space between the protective shield and the camera housing. Sensor data is received from various vehicle sensors to assess the temperature of the housing, the velocity of the vehicle, and so forth to determine when the fluid should be supplied.

Provided is an information processing device including: a sensor data acquisition unit configured to acquire sensor data provided by a sensor worn by a user or mounted on a piece of equipment used by the user; an action detection unit configured to detect an action of the user on a basis of the sensor data, the action including a turn; and an information generation unit configured to generate information regarding the turn.

Printed circuit boards (PCBs) are configured with an athermalized mounting suitable for securing and positioning and the PCBs within an inertial measurement unit (IMU). The PCBs include integrated circuit (IC) components, such as accelerometers and/or gyroscopes, which require relative positional stability within the IMU environment in order to provide accurate results. The athermalized mounting configuration of the PCB enables the PCBs to experience thermal expansion within the IMU without causing significant displacement of the IC relative to the IMU environment.

A method for compensating drift of a motion direction sensor system for measuring a motion direction of a user in a VR system includes receiving a measured viewing direction of the user from a viewing direction sensor system for measuring a viewing direction at a measurement time, receiving a measured motion direction of the user from the motion direction sensor system for measuring a motion direction at the same measurement time, and calculating a drift compensation from the difference between the measured viewing direction of the user and the measured motion direction of the user so that a drift compensated motion direction of the user can be determined by adding the calculated drift compensation to a subsequently measured motion direction of the user. One embodiment includes a computer program product and a device configured to perform the method.

A method for compensating drift of a motion direction sensor system for measuring a motion direction of a user in a VR system includes receiving a measured viewing direction of the user from a viewing direction sensor system for measuring a viewing direction at a measurement time, receiving a measured motion direction of the user from the motion direction sensor system for measuring a motion direction at the same measurement time, and calculating a drift compensation from the difference between the measured viewing direction of the user and the measured motion direction of the user so that a drift compensated motion direction of the user can be determined by adding the calculated drift compensation to a subsequently measured motion direction of the user. One embodiment includes a computer program product and a device configured to perform the method.

An apparatus for analysing the condition of a machine having a part rotating with a speed of rotation (f.sub.ROT), comprising: a first sensor (10) adapted to generate an analogue electric measurement signal (S.sub.EA) dependent on mechanical vibrations (V.sub.MD) emanating from rotation of said part; an analogue-to-digital converter (40, 44) adapted to sample said analogue electric measurement signal (S.sub.EA) at an initial sampling frequency (f.sub.S) so as to generate a digital measurement data signal (SMD, .sub.SENV) in response to said received analogue electric measurement signal (S.sub.EA); a device (420) for generating a position signal (Ep) having a sequence of position signal values (P.sub.(i)) for indicating momentary rotational positions of said rotating part; and a speed value generator (601) being adapted for recording a time sequence of said position signal values (P.sub.(i)) such that there are angular distances (delta-FI.sub.p1-p2, delta-FI.sub.p2-p3) and corresponding durations (delta-T.sub.p1-p2; delta-T.sub.p2-p3) between at least three consecutive position signals (P1, P2, P3) wherein the speed value generator (601) operates to establish at least two momentary speed values (VT1; VT2) based on said angular distances (delta-FI.sub.p1-p2, delta-FI.sub.p2-p3) and said corresponding durations (delta-T.sub.p1-p2; delta-T.sub.p2-p3), and wherein further momentary speed values for the rotational part (8) are established by interpolation between the at least two momentary speed values (VT1, VT2).

An apparatus for analysing the condition of a machine having a part rotating with a speed of rotation (f.sub.ROT), comprising: a first sensor (10) adapted to generate an analogue electric measurement signal (S.sub.EA) dependent on mechanical vibrations (V.sub.MD) emanating from rotation of said part; an analogue-to-digital converter (40, 44) adapted to sample said analogue electric measurement signal (S.sub.EA) at an initial sampling frequency (f.sub.S) so as to generate a digital measurement data signal (SMD, .sub.SENV) in response to said received analogue electric measurement signal (S.sub.EA); a device (420) for generating a position signal (Ep) having a sequence of position signal values (P.sub.(i)) for indicating momentary rotational positions of said rotating part; and a speed value generator (601) being adapted for recording a time sequence of said position signal values (P.sub.(i)) such that there are angular distances (delta-FI.sub.p1-p2, delta-FI.sub.p2-p3) and corresponding durations (delta-T.sub.p1-p2; delta-T.sub.p2-p3) between at least three consecutive position signals (P1, P2, P3) wherein the speed value generator (601) operates to establish at least two momentary speed values (VT1; VT2) based on said angular distances (delta-FI.sub.p1-p2, delta-FI.sub.p2-p3) and said corresponding durations (delta-T.sub.p1-p2; delta-T.sub.p2-p3), and wherein further momentary speed values for the rotational part (8) are established by interpolation between the at least two momentary speed values (VT1, VT2).

A fault detection system includes a sensor configured to measure a physical quantity and generate a measurement of the physical quantity; a first processor configured to receive the measurement, execute a first firmware based on the measurement, and output a first result of the executed first firmware; a second processor configured to receive the measurement from the sensor, execute a second firmware based on the measurement, and output a second result of the executed second firmware, wherein the first firmware and the second firmware provide a same nominal function in a diverse manner for calculating the first result and the second result, respectively, such that the first result and the second result are expected to be within a predetermined margin; and a fault detection circuit configured to detect a fault when the first result and the second result are not within the predetermined margin.

A fault detection system includes a sensor configured to measure a physical quantity and generate a measurement of the physical quantity; a first processor configured to receive the measurement, execute a first firmware based on the measurement, and output a first result of the executed first firmware; a second processor configured to receive the measurement from the sensor, execute a second firmware based on the measurement, and output a second result of the executed second firmware, wherein the first firmware and the second firmware provide a same nominal function in a diverse manner for calculating the first result and the second result, respectively, such that the first result and the second result are expected to be within a predetermined margin; and a fault detection circuit configured to detect a fault when the first result and the second result are not within the predetermined margin.