WE CLAFM:
1. A sensor assembly comprising:
one or more accelerometers (116; 412, 414) configured to generate movement signals indicative of sensed movement of a powered system (104) in one or more directions;
a fluid level sensor (116; 404) configured to generate fluid level signals indicative of a sensed amount of fluid in the powered system (104);
one or more processors (106; 118) configured to receive the movement signals and the fluid level signals from the one or more accelerometers (116; 412, 414) and the fluid level sensor (116; 404), the one or more processors (106; 118) also configured to one or more of filter at least some of the movement signals based on a speed at which the powered system (104) operates or calculate one or more of statistical measure, a fast Fourier transform (FFT), or a discrete Fourier transform (DFT) of the movement signals; and
a first antenna (434; 440) configured to wirelessly communicate the one or more of the movement signals, the amount of fluid, the statistical measure, the FFT, or the DFT to a remote location.
2. The sensor assembly as claimed in claim 1, further comprising a
housing (444) in which the one or more accelerometers (116; 412, 414), the fluid level
sensor (116; 404), the one or more processors (106; 118), and the first antenna (434;
440) are disposed.

3. The sensor assembly as claimed in claim 1, wherein the one or more processors (106; 118) are configured to filter the movement signals with a filter having a bandwidth that increases for faster speeds of a motor (110) of the powered system (104) and that decreases for slower speeds of the motor (110).
4. The sensor assembly as claimed in claim 1, wherein the one or more processors (106; 118) are configured to calculate the statistical measure of the movement signals as a combination of movements of a propulsion system (110) of the powered system (104) in multiple, different directions.
5. The sensor assembly as claimed in claim 1, wherein the one or more processors (106; 118) are configured to calculate the statistical measure as a root mean square of the movement signals of the propulsion system (110) in the multiple, different directions over a sampling period.
6. The sensor assembly as claimed in claim 1, wherein the first antenna (434; 440) is configured to wirelessly communicate the one or more of the movement signals, the amount of fluid, the statistical measure, the FFT, or the DFT to the remote location at regular intervals, and further comprising a second antenna (434; 440) configured to wirelessly communicate the one or more of the movement signals, the amount of fluid, the statistical measure, the FFT, or the DFT to the remote location responsive to receipt of an interrogation signal from an external device (442).

7. The sensor assembly as claimed in claim 6, wherein the first antenna
(434; 440) is configured to communicate the one or more of the movement signals, the amount of fluid, the statistical measure, the FFT, or the DFT over a first communication link and the second antenna (434; 440) is configured to communicate the one or more of the movement signals, the amount of fluid, the statistical measure, the FFT, or the DFT over a different, second communication link, wherein the first communication link is a higher power and longer range communication link than the second communication link.
8. A system comprising:
a sensor (116; 412, 414) configured to generate vibration signals indicative of senses vibrations of a vehicle (104); and
one or more processors (106; 118) configured to one or more of:
filter at least some of the vibration signals based on a speed at which a motor (110) of the vehicle (104) operates and communicate the vibration signals that are not filtered out of the sensor (116; 412, 414), or
calculate one or more of statistical measure, a fast Fourier transform (FFT), or a discrete Fourier transform (DFT) of the vibration signals and communicate the one or more of the statistical measure, the FFT, or DFT out of the sensor (116; 412, 414).
9. The system as claimed in claim 8, wherein the one or more processors
(106; 118) are configured to filter the at least some of the vibration signals with a filter

having a bandwidth that increases for faster speeds of the motor and that decreases for slower speeds of the motor (110).
10. The system as claimed in claim 8, wherein the one or more processors (106; 118) are configured to calculate the statistical measure of the vibration signals as a combination of movements of a propulsion system of the vehicle (104) in multiple, different directions.
11. The system as claimed in claim 8, wherein the one or more processors (106; 118) are configured to calculate the statistical measure as a root mean square of the vibration signals of the propulsion system (110) of the vehicle (104) in the multiple, different directions over a sampling period.
12. The system as claimed in claim 8, wherein the one or more processors (106; 118) are configured to communicate one or more of the vibration signals, the statistical measure, the FFT, or the DFT at regular intervals via a first wireless communication link and to communicate the one or more of the vibration signals, the statistical measure, the FFT, or the DFT responsive to receipt of an interrogation signal from an external device (442) via a different, second wireless communication link.
13. The system as claimed in claim 8, further comprising:

a transceiver (430) and a first antenna (434) configured to communicate the one or more of the vibration signals, the statistical measure, the FFT, or the DFT at the regular intervals over the first communication link at a designated frequency.
14. A method comprising:
generating vibration signals representative of sensed vibrations of a vehicle (104) using a sensor (116; 412, 414); and
one or more of:
filtering at least some of the vibration signals that are sensed based on a speed at which a motor (110) and wheels (112) of the vehicle (104) operates and communicating the vibration signals that are not filtered out of the sensor (116; 412,414); or
calculating one or more of statistical measure, a fast Fourier transform (FFT), or a discrete Fourier transform (DFT) of the vibration signals and communicating the one or more of the statistical measure, the FFT, or DFT out of the sensor (116; 412, 414).
15. The method as claimed in claim 14, further comprising aborting the one or more of filtering or calculating responsive to the vibrations that are represented by the vibration signals being less than a designated, non-zero threshold.
Dated this the 13th day of December, 2016