Acoustic sensor for proactive fault monitoring in computer systems
View Patent ↗Embodiments of the present invention provide a system for detecting vibrations from a component. The system operates by coupling vibrations from a component to a membrane using a flexible connecting line. The membrane converts the vibrations into acoustic waves that are transmitted through a medium. Finally, a microphone detects the acoustic waves in the medium and converts the acoustic waves into electrical signals.
1. An apparatus that detects vibrations from a component, comprising:
a connecting line coupled to the component, wherein the connecting line is flexible;
a membrane;
a connecting line coupler configured to couple the connecting line to the membrane, so that vibrations from the component are mechanically transferred through the connecting line and the connecting line coupler to the membrane, wherein the membrane converts the vibrations into acoustic waves that are transmitted through a medium; and
a microphone which detects the acoustic waves in the medium and which converts the acoustic waves into electrical signals.
2. The apparatus of claim 1 , further comprising:
multiple connecting lines separately coupled to multiple components, wherein each connecting line is flexible;
wherein the connecting line coupler couples the multiple connecting lines to the membrane, so that vibrations from the multiple components are mechanically transferred through the corresponding connecting line and the connecting line coupler to the membrane, wherein the membrane converts the vibrations into acoustic waves that are transmitted through the medium.
3. The apparatus of claim 2 , wherein each of the multiple connecting lines has different mechanical coupling properties to facilitate converting the vibrations from the corresponding component into separately identifiable acoustic waves.
4. The apparatus of claim 2 , wherein the connecting line is bent and/or curved as the connecting line is routed between the component and the connecting line coupler.
5. The apparatus of claim 4 , wherein a connecting line is rerouted if an object is placed in the route of the connecting line.
6. The apparatus of claim 1 , wherein the medium includes air.
7. The apparatus of claim 1 , further comprising an acoustically insulated enclosure which encloses the membrane, the microphone, and the medium, wherein the acoustically insulated enclosure prevents external acoustic sources from being detected by the microphone.
8. The apparatus of claim 1 , further comprising a data acquisition system which is coupled to the microphone, wherein the electrical signals generated by the microphone are received by the data acquisition system, and wherein the data acquisition system analyzes the electrical signals to determine the health of the component.
9. The apparatus of claim 1 , wherein the component includes at least one of:
a hard disk drive;
a chassis fan;
a power supply fan;
a processor fan; or
any other device that produces vibrations during normal operation.
10. The apparatus of claim 1 , wherein the amplitude of the acoustic waves generated by the membrane is adjusted by adjusting physical properties of the membrane.
11. A method for detecting vibrations from a component, comprising:
mechanically transferring vibrations from the component to a membrane using a flexible connecting line;
using the membrane to convert the vibrations into acoustic waves that are transmitted through a medium; and
using a microphone to detect the acoustic waves in the medium and to convert the acoustic waves into electrical signals.
12. The method of claim 11 , wherein the method further comprises:
mechanically transferring vibrations from multiple components to the membrane using a separate flexible connecting line for each component;
using the membrane to convert the vibrations into acoustic waves that are transmitted through a medium; and
using a microphone to detect the acoustic waves in the medium and to convert the acoustic waves into electrical signals.
13. The method of claim 12 , wherein each connecting line has different mechanical coupling properties to facilitate converting the vibrations from the corresponding component into separately identifiable acoustic waves.
14. The method of claim 12 , wherein the method further comprises bending and/or curving the connecting line while routing the connecting line between the component and the membrane.
15. The method of claim 14 , wherein the method further comprises rerouting the connecting line if an object is placed in the connecting line's route.
16. The method of claim 11 , wherein the medium includes air.
17. The method of claim 11 , wherein the method further comprises enclosing the membrane, the microphone, and the medium in an acoustically insulated enclosure, wherein the acoustically insulated enclosure prevents external acoustic sources from being detected by the microphone.
18. The method of claim 11 , wherein the method further comprises using a data acquisition system which is coupled to the microphone to analyze the electrical signals to determine the health of the component, wherein the electrical signals generated by the microphone are received by the data acquisition system.
19. The method of claim 11 , wherein the component is at least one of:
a hard disk drive;
a chassis fan;
a power supply fan;
a processor fan; or
any other device that produces vibrations during normal operation.
20. The method of claim 11 , wherein the method further comprises adjusting a physical property of the membrane to adjust an amplitude of the acoustic waves generated by the membrane.