A device of or attached to a roller body determines a rotational frequency of the roller body (or other object) rotating about an axis of rotation includes an acceleration sensor that detects an acceleration signal of an acceleration in a first direction extending in a radial or tangential direction to the axis of rotation of the roller body; and an electronic processing unit and configured to low-pass and high-pass, particularly adaptively high-pass filter, the detected acceleration signal, perform a derivation, with respect to time, of the filtered signal, optimize the signal with a subsequent absolute-amount generation and with moving averaging, and ascertain a frequency of the filtered acceleration signal, which corresponds to the rotational frequency of the roller body.

A device of or attached to a roller body determines a rotational frequency of the roller body (or other object) rotating about an axis of rotation includes an acceleration sensor that detects an acceleration signal of an acceleration in a first direction extending in a radial or tangential direction to the axis of rotation of the roller body; and an electronic processing unit and configured to low-pass and high-pass, particularly adaptively high-pass filter, the detected acceleration signal, perform a derivation, with respect to time, of the filtered signal, optimize the signal with a subsequent absolute-amount generation and with moving averaging, and ascertain a frequency of the filtered acceleration signal, which corresponds to the rotational frequency of the roller body.

Systems and methods for crash determination in accordance with embodiments of the invention are disclosed. In one embodiment, a vehicle telematics device includes a processor and a memory storing a crash determination application, wherein the processor, on reading the crash determination application, is directed to obtain sensor data from at least one sensor installed in a vehicle, calculate peak resultant data based on the sensor data, where the peak resultant data describes the acceleration of the vehicle over a first time period, generate crash score data based on the peak resultant data and a set of crash curve data for the vehicle, where the crash score data describes the likelihood that the vehicle was involved in a crash based on the characteristics of the vehicle and the sensor data, and provide the obtained sensor data when the crash score data exceeds a crash threshold to a remote server system.

Systems and methods for crash determination in accordance with embodiments of the invention are disclosed. In one embodiment, a vehicle telematics device includes a processor and a memory storing a crash determination application, wherein the processor, on reading the crash determination application, is directed to obtain sensor data from at least one sensor installed in a vehicle, calculate peak resultant data based on the sensor data, where the peak resultant data describes the acceleration of the vehicle over a first time period, generate crash score data based on the peak resultant data and a set of crash curve data for the vehicle, where the crash score data describes the likelihood that the vehicle was involved in a crash based on the characteristics of the vehicle and the sensor data, and provide the obtained sensor data when the crash score data exceeds a crash threshold to a remote server system.

A wireless adapter (10) is removably connected to an electronic device (30) to provide wireless connectivity for the electronic device (30). One or more operating parameters of the wireless adapter (10) are measured whilst the wireless adapter (10) is in use. A measure of the temperature of the wireless adapter (10) is obtained based on the measured one or more operating parameters.

A wireless adapter (10) is removably connected to an electronic device (30) to provide wireless connectivity for the electronic device (30). One or more operating parameters of the wireless adapter (10) are measured whilst the wireless adapter (10) is in use. A measure of the temperature of the wireless adapter (10) is obtained based on the measured one or more operating parameters.

Sensor having a control unit, configured to analyze data available to the sensor, in particular measurement data of the sensor, for generating power management data, the power management data being configured to for select a power saving mode from a plurality of available power saving modes of a wireless module (103) of the sensor and/or for controlling the times of measurement intervals of the sensor and/or for power management of the sensor.

An arrangement for sensor node calibration, including a calibration chamber including or being connected to a unit to facilitate control of at least one calibration quantity or attribute in the calibration chamber, a reference measuring unit arranged to measure at least one calibration quantity or attribute inside the calibration chamber, and a computing unit arranged to obtain from at least one sensor node sensor node identifier (ID) information, sensor node measurement information, wherein the computing unit is arranged to identify a sensor node based on sensor node ID information received from the sensor node, obtain measurement information the identified 0sensor node, obtain calibration quantity or attribute measurement in-formation from the reference measuring unit, and compare calibration quantity or attribute measurement information with sensor node measurement information. Corresponding device and method are also disclosed.

A measuring assembly with at least two measuring devices and a higher-level unit, characterized in that the measuring assembly further has a network distributor, wherein the measuring devices are connected to the network distributor via a two-wire Ethernet connection, the measuring devices are fully supplied with power via the two-wire Ethernet connection, and the network distributor is connected to the higher-level unit with an Ethernet connection.

There are provided a sensor data collection device, a sensor data collection system, and a method of collecting sensor data capable of reducing a drain of a battery due to standby power. The sensor data collection device includes a power supply, a power supply control circuit configured to control the power supply, a sensor configured to perform sensing to thereby obtain data, a memory configured to store the data obtained by the sensor, and a control circuit configured to control the power supply control circuit, the sensor, and the memory. The power supply control circuit supplies the sensor, the memory, and the control circuit with electrical power supplied by the power supply, and the control circuit makes the transition to any one of a plurality of operating states, and makes the power supply control circuit shut off the electrical power supplied by the power supply after a first operating state is completed and before the transition to a second operating state is made wherein the first operating state and the second operating state are included in the plurality of operating states.