1. A system for determining a shaft misalignment in a train of components with serially coupled rotating shafts, comprising:
a sensor affixed to a component of the train proximate a rotating shaft, wherein the sensor collects vibration data along an axial direction of the rotating shaft;
a frequency analyzer for generating frequency domain data from the vibration data; and
an analysis system for analyzing a frequency component of the frequency domain data at one times a rotational frequency of the rotating shaft to identify a misalignment between the rotating shaft and an adjacently coupled rotating shaft.
2. The system of claim 1, wherein the sensor is affixed to a bearing housing proximate the rotating shaft.
3. The system of claim 1, wherein a peak magnitude at about one times the rotational frequency of the rotating shaft indicates a misalignment.
4. The system of claim 1, wherein the component comprises a clutch that allows the rotating shaft to be disengaged from the adjacently coupled rotating shaft.
5. The system of claim 1, wherein the analysis system evaluates trends in the frequency domain data to predict a possible misalignment.
6. The system of claim 1, wherein the analysis system outputs alignment information in a continuous manner.
7. The system of claim 1, wherein the analysis system outputs a warning if a misalignment is detected.
8. The system of claim 1, wherein the frequency analyzer utilizes a calculation selected from a group consisting of: a Fourier transform, a fast Fourier transform, a Cepstrum analysis, and a Z transform.
9. The system of claim 1, further comprising a plurality of sensors for collecting axial vibration data from a plurality of locations in the train.
10. A train, comprising:
a plurality of components with serially coupled rotating shafts;
a sensor affixed to at least one component proximate a rotating shaft, wherein the sensor collects vibration data along an axial direction of the rotating shaft;
a frequency analyzer for generating frequency domain data from the vibration data; and
an analysis system for analyzing a frequency component of the frequency domain data at one times a rotational frequency of the rotating shaft to identify a misalignment between the rotating shaft and an adjacently coupled rotating shaft.
11. The train of claim 10, wherein the sensor is affixed to a bearing housing proximate the rotating shaft.
12. The train of claim 10, wherein a peak magnitude at about one times the rotational frequency of the rotating shaft indicates a misalignment.
13. The train of claim 10, wherein the at least one component comprises a clutch that allows the rotating shaft to be disengaged from the adjacently coupled rotating shaft.
14. The train of claim 10, wherein the analysis system evaluates trends in the frequency domain data to predict a future misalignment.
15. The train of claim 10, wherein the analysis system outputs alignment information in a continuous manner.
16. The train of claim 10, wherein the analysis system outputs a warning if a misalignment is detected.
17. The train of claim 10, wherein the frequency analyzer utilizes a calculation selected from a group consisting of: a Fourier transform, a fast Fourier transform, a Cepstrum analysis, and a Z transform.
18. The train of claim 10, further comprising a plurality of sensors for collecting axial vibration data from a plurality of locations in the train.
19. An apparatus for determining a shaft misalignment in a train of components with serially coupled rotating shafts, comprising:
a sensor affixed to a component of the train proximate a rotating shaft, wherein the sensor collects vibration data along an axial direction of the rotating shaft;
a frequency analyzer for generating frequency domain data from the vibration data; and
an analysis system for analyzing the frequency domain data to generate alignment information of the rotating shaft with respect to an adjacently coupled rotating shaft.
20. The apparatus of claim 19, wherein the sensor is affixed to a bearing housing proximate the rotating shaft.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A skin tanning chamber, the improvement comprising at least one light emitting diode emitting a UVA light, wherein the light emitting diode (LED) emits essentially only UVA light, and wherein the LED is incorporated into a rigid form.
2. The skin tanning chamber of claim 1 wherein the chamber is a bed or booth.
3. The skin tanning chamber of claim 1 further comprising at least one LED emitting a UVB andor a UVC light.
4. The skin tanning chamber of claim 3 wherein the LED emitting the UVA light is under independent control from the LED emitting UVC light.
5. The skin tanning chamber of claim 1 the improvement comprising a plurality of LEDs emitting UVA light.
6. The skin tanning chamber of claim 5 further comprising a means for controlling the electric current to each LED to maintain a constant total radiant flux over the life time of each LED.
7. The skin tanning chamber of claim 5 further comprising a means for controlling the LEDs to allow radiation to selected portions of the skin.
8. The skin tanning chamber of claim 5 further comprising a means for controlling the period of exposure.
9. The skin tanning chamber of claim 8 further comprising a means for storing records of use.
10. The skin tanning chamber of claim 1 wherein the LED is incorporated into a form which is adapted to fit into a standard fluorescent bulb fixture.
11. The skin tanning chamber of claim 10 wherein the form farther comprises an internal power converter.
12. The skin tanning chamber of claim 1 wherein the LEDs are ventilated.
13. The skin tanning chamber of claim 12 wherein the LEDs are ventilated by a fan directing air longitudinally across the LEDs.
14. The skin tanning chamber of claim 13 wherein the LEDs are disposed within a transparent tube characterized by one or more perforations which provide for air flow out of the tube.
15. The skin tanning chamber of claim 14 wherein the tube is characterized by a closed end and an open end, wherein the air is directed through the open end and out the perforations.
16. The skin tanning chamber of claim 15 wherein the density of perforations on the distal end of the tube, with respect to the open end, is greater than the density of perforations on the proximal end.
17. The skin tanning chamber of claim 15 wherein the perforations on the distal end of the tube, with respect to the open end, are larger than the perforations on the proximal end.
18. The skin tanning chamber of claim 15 comprising a bed and a circuit board characterized by an array of UVA LEDs.
19. The skin tanning chamber of claim 18 wherein the circuit board is selected from the group consisting of (a) rigid, (b) curved, and (c) flexible.