System of components with sensors and method for monitoring the system of components

Patent metadata

Field	Value
Publication number	US-9530258-B2
Application number	US-201514755346-A
Country	US
Kind code	B2
Filing date	Jun 30, 2015
Priority date	Jul 1, 2014
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

A system comprising a plurality of components operating under essentially identical conditions, wherein each of the components is equipped with at least one sensor for measuring the same operating parameter for each of the components, and a monitoring unit configured to receive and process the signals of the sensors and to generate maintenance data based on the sensor signals. The monitoring unit is configured to calculate a parameter quantifying deviations between the measured operating parameters.

First claim

The invention claimed is:

1. A vehicle comprising:
the vehicle having a plurality of essentially identical bearings disposed thereon, each of the essentially identical bearings further comprising:
an outer ring;
a sensor for measuring a bearing operation condition, the sensor configured to transmit a bearing measurement signal associated with the bearing operation condition;

a processor disposed in the vehicle that is configured to receive the bearing measurement signals of the sensor in each of the plurality of essentially identical bearings,
wherein the processor is configured to use the bearing operation signals in each of the plurality of essentially identical bearings to calculate a standard deviation of the bearing operation conditions measured in all of the plurality of essentially identical bearings such that the standard deviation is related to a variance of the bearing operation conditions measured in all of the plurality of essentially identical bearings at the same point in time, and
wherein the processor is further configured to compare the standard deviation to a threshold value, if the standard deviation is greater than the threshold value then the processor is configured to generate a maintenance alert.

2. The vehicle according to claim 1 , wherein the maintenance alert is a signal indicating that one of the plurality of essentially identical bearings needs replacement.

3. The vehicle according to claim 2 , wherein the processor is further configured to determine which one of the plurality of essentially identical bearings needs replacement.

4. The vehicle according to claim 1 , wherein the sensor in each of the plurality of essentially identical bearings is further configured to continuously measure the bearing operation condition in real-time, and wherein the sensor in each of the plurality of essentially identical bearings continuously transmits the bearing measurement signal associated with the bearing operation condition.

5. The vehicle according to claim 4 , wherein the processor is further configured to continuously in real-time calculate the standard deviation.

6. The vehicle according to claim 1 , wherein the sensor is one of a vibration sensor, a strain sensor, an acoustics sensor, an acceleration sensor and a capacitance sensor.

7. The vehicle according to claim 1 , wherein the plurality of essentially identical bearings are self-lubricating plain bearings.

8. The vehicle according to claim 1 , wherein the plurality of essentially identical bearings are rotor pitch control bearings of a helicopter.

9. The vehicle according to claim 1 , wherein the plurality of essentially identical bearings and the processor are configured to communicate in a wireless network.

10. The vehicle according to claim 1 , wherein the plurality of essentially identical bearings are integrated into an aircraft.

11. A method of determining whether one of a plurality of bearings needs replacement, the method comprising the steps of:
providing a vehicle having the plurality of bearings disposed thereon, each of the plurality of bearings being essentially identical to each other, each of the plurality of bearings comprising an outer ring and a sensor configured to continuously measure a bearing operation condition in real-time;
operating the vehicle for a period of time;
during the period of time of operation of the vehicle, continuously measuring the bearing operation condition by the sensor in each of the plurality of bearings;
during the period of time of operation of the vehicle, continuously transmitting, by the sensor in each of the plurality of bearings, a bearing measurement signal associated with the bearing operation condition;
providing a processor in the vehicle that is configured to continuously receive the bearing measurement signal from each of the plurality of bearings, the processor configured to activate the maintenance light;
the processor in real time continuously transforming the bearing measurement signal from all of the plurality of bearings into a single real time standard deviation associated with the bearing operation conditions of the plurality of bearings at that time;
continuously comparing by the processor the single real time standard deviation to a threshold value such that serviceability of the plurality of bearings can be monitored while the vehicle is undergoing a particular vehicle operating condition without requiring that prior data for acceptable bearing operation conditions when exposed to the particular vehicle operating condition is available for comparison by the processor;
activating a maintenance alert within the vehicle by the processor if the single real time standard deviation is greater than the threshold value to signal that one of the plurality of bearings needs replacing and/or maintenance.

12. The method of claim 11 , wherein the step of providing the vehicle further comprises the vehicle having a maintenance light which is activated by the maintenance alert.

Assignees

• Bell Andrew
• Colton Michael
• Skf Ab

Inventors

• Bell Andrew
• Colton Michael

Classifications

• G01M13/04 Primary

  Bearings · CPC title

• G07C5/0841 Primary

  Registering performance data (recording measured values G01D; information storage G11B) · CPC title

• F16C19/527

  related to vibration and noise · CPC title

• F16C2326/43

  Aeroplanes; Helicopters · CPC title

• F16C17/02

  for radial load only · CPC title