A fault diagnosis method and a fault diagnosis apparatus for a vehicle speed measurement apparatus. The method includes: obtaining a first vehicle speed measured by the speed measurement apparatus; obtaining reference information of a static reference object at N moments, where N is an integer greater than 1, and the reference information includes information about a location relationship of the static reference object relative to a vehicle in which the speed measurement apparatus is located at each of the N moments; calculating a second vehicle speed based on the reference information; and determining, based on the first vehicle speed and the second vehicle speed, whether the speed measurement apparatus is faulty.

A sensor mounting device and method to accurately mount a sensor to a test asset for data collection and component validation, the sensor mounting device including a leveling plate equipped with a level indicator, an alignment shelf adapted to constrain the movement of a sensor and hold the sensor level relative to the level indicator, and various protruding structures for aligning the mounting device with the test asset. The sensor mounting device may further include a base structure to support the leveling plate and allow a user to adjust the vertical position of the sensor to be mounted. The base structure may include a plurality of spanning members on which the leveling plate is mounted as to allow the leveling plate to be adjusted vertically.

A sensor mounting device and method to accurately mount a sensor to a test asset for data collection and component validation, the sensor mounting device including a leveling plate equipped with a level indicator, an alignment shelf adapted to constrain the movement of a sensor and hold the sensor level relative to the level indicator, and various protruding structures for aligning the mounting device with the test asset. The sensor mounting device may further include a base structure to support the leveling plate and allow a user to adjust the vertical position of the sensor to be mounted. The base structure may include a plurality of spanning members on which the leveling plate is mounted as to allow the leveling plate to be adjusted vertically.

A method at a sensor apparatus, the method including calculating a value for a target function based on at least one sensor of the sensor apparatus; determining that the value of the target function is within a defined threshold range for a defined time period, thereby finding an in-flight state for the sensor apparatus; and turning off transmission from a radio of the sensor apparatus based on the in-flight state.

System, method, and circuitry for utilizing sequential input inertial sensor data to calculate recursive features for training a machine learning algorithm or for classifying the data as a known class. The recursive feature values of a current data sample are calculating based on comparisons between the current data sample value and previous recursive feature values. The recursive features include a recursive maximum, recursive minimum, recursive peak to peak, recursive average, recursive root mean square, and recursive variance.

System, method, and circuitry for utilizing sequential input inertial sensor data to calculate recursive features for training a machine learning algorithm or for classifying the data as a known class. The recursive feature values of a current data sample are calculating based on comparisons between the current data sample value and previous recursive feature values. The recursive features include a recursive maximum, recursive minimum, recursive peak to peak, recursive average, recursive root mean square, and recursive variance.

A sensor for detecting a physical variable in dependence on an alignment of the sensor around an axis of the sensor, including: a sensor body having a predetermined first shape feature on an outer surface of the sensor body for enabling a predetermined alignment of the sensor around the axis. Also described is a related system with the sensor.

An aerological sonde for measuring meteorological conditions in a cyclonic storm, the aerological sonde including a sonde casing having an outer casing surface and measurement unit arranged inside the sonde casing. The outer casing surface is arranged to form a sole drag surface of the aerological sonde such that a self-sustaining aerological sonde is formed. The measurement unit of the self-sustaining aerological sonde includes a turbulence sensor arranged to measure change of movement of the self-sustaining aerological sonde.

An aerological sonde for measuring meteorological conditions in a cyclonic storm, the aerological sonde including a sonde casing having an outer casing surface and measurement unit arranged inside the sonde casing. The outer casing surface is arranged to form a sole drag surface of the aerological sonde such that a self-sustaining aerological sonde is formed. The measurement unit of the self-sustaining aerological sonde includes a turbulence sensor arranged to measure change of movement of the self-sustaining aerological sonde.

A tracker device includes a positioning system, a communication system, and a movement sensing system. The tracker device is configured to utilize the movement sensing system to reduce power consumption during waterborne transport. The tracker device intermittently operates its positioning system to determine a geographic position of the tracker device, and intermittently operates the communication system to transmit the geographic position to a remote computer. The tracker device further detects, based on at least one signal from the movement sensing system, that the tracker device is in transit on a waterborne vessel, and disables the communication system when the tracker device is detected to be in transit on the waterborne vessel.