Method and device for analyzing resonance

• US 9,568,355 B2
• Filed: 01/11/2016
• Issued: 02/14/2017
• Est. Priority Date: 03/15/2013
• Status: Expired due to Fees

• Current Assignee: First Principles Incorporated
• Original Assignee: First Principals, Inc.
• Inventors: Raniere, Keith A.
• Primary Examiner(s): SAINT SURIN, JACQUES M
• Application Number:
  US14/992,541
• Publication Number:
  US 20160138966A1
• Time in Patent Office: 400 Days
• Field of Search: 735/79
• US Class Current: 1/1
• CPC Class Codes: B60R 13/08 Insulating elements, e.g. for sound insulation sound insulating linings for trains B61D17/185; drivers' cabs for load-carrying vehicles insulated against vibrations or noise B62D33/0604; thermal or acoustic insulation of engines F02B77/11; damping of sounds using compensation by electro-acoustic methods G10K11/178
• CPC Class Codes: B60Y 2306/09 Reducing noise
• CPC Class Codes: F16F 15/00 Suppression of vibrations in systems damping of non-rotary systems using inertia effect F16F7/10; prevention or isolation of vibrations in machine tools B23Q11/0032; suppression of driveline vibrations in hybrid vehicle transmissions B60W30/20 ; vehicle seat suspension devices B60N2/50; methods or devices for protecting against, or damping of, acoustic waves, e.g. sound G10K11/16; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion vibration absorbing or balancing means for aircraft propellers B64C11/008, for rotorcraft rotors B64C27/001 ; testing static and dynamic balance of machines or structures G01M1/00
• CPC Class Codes: F16F 15/005 using electro- or magnetostrictive actuation means generating of mechanical vibrations operating with electrostriction B06B1/06, with magnetostriction B06B1/08; vehicle suspension arrangements characterised by use of piezoelectric elements B60G17/01941; piezoelectric, electrostrictive and magnetostrictive devices per se H10N30/00
• CPC Class Codes: G01H 13/00 Measuring resonant frequency
• CPC Class Codes: G05D 19/02 characterised by the use of electric means
• CPC Class Codes: G10D 1/02 Bowed or rubbed string instruments, e.g. violins or hurdy-gurdies
• CPC Class Codes: G10K 11/17857 Geometric disposition, e.g. placement of microphones
• CPC Class Codes: G10K 11/17873 using a reference signal without an error signal, e.g. pure feedforward
• CPC Class Codes: G10K 11/17875 using an error signal without a reference signal, e.g. pure feedback
• CPC Class Codes: G10K 2210/128 Vehicles
• CPC Class Codes: G10K 2210/12821 Rolling noise; Wind and body noise
• CPC Class Codes: G10K 2210/1291 Anti-Vibration-Control, e.g. reducing vibrations in panels or beams

Abstract

A detection, analysis, and correction of unwanted frequencies is provided. The elimination of a wolf tone may be done through either correction of surface instability or dynamic frequency correction by a signal generator.

Claims

1. A device for analyzing and compensating for instability and surface tension due to resonance of vibrations of a material, said device comprising:

a microprocessor;

a sensor, to measure detect vibrations due to resonance of a material at a frequency and monitor any direct correlation of an environmental condition to a harmonic or resonation problem, said sensor having an output in electrical communication with the microprocessor when vibrations are present at the measured frequency;

a tensioner for adjusting surface tension of the material to reduce resonance, wherein said tensioner adjusts tension when said microprocessor determines resonance as sensed by said sensor;

wherein the tensioner is located on a surface of a body of at least one of a vehicle and a musical instrument.

2. The device of claim 1 wherein the tensioner is a length adjustable wire having at least two mounting points on the surface, wherein the tension of the wire controls the tension of the material.

3. The device of claim 1 further comprising:

a surface tension sensor, wherein said sensor is a piezoelectric film having a plurality of layers, wherein the intensity of the electrical signal determines the tension of the surface relative to the frequency measured.

4. The device of claim 1 wherein the tensioner is a piezoelectric pusher.

5. The device of claim 1 wherein the tensioner is an additional surface layer under tension affixed to an original surface to create a new surface tension.

6. The device of claim 1 wherein the tensioner is at least one force protruding implement configured to engage the material such that a fulcrum point is created such that force applied at the fulcrum point tensions the surface of the body.

7. The device of claim 1, wherein the tensioner adjust a tension of the surface of the body.

8. The device of claim 1, wherein the tensioner is located on a back surface of the body of the musical instrument.

9. The device of claim 1 wherein the musical instrument is selected from the group consisting of violin, guitar, cello, base, banjo, harp, harpsichord, piano, viola, mandolin, and ukulele.

10. A device for analyzing and correcting undesired resonance comprising:

a power source;

a microprocessor electrically connected to the power source;

a sensor having an output, the sensor monitoring any direct correlation of an environmental condition to a harmonic or resonation problem, wherein the sensor is electrically connected to the microprocessor, which receives the output from the sensor, wherein the microprocessor generates a result; and

a wave generating device sharing a feedback loop with the microprocessor, the feedback loop continuously monitoring and correcting a wolf tone, wherein the wave generating device generates a wave comprising a frequency and amplitude to nullify an effect of the wolf tone.

11. The device of claim 10, further comprising:

an amplifier in electrical connection with the wave generating device.

12. The device of claim 10, wherein the power source is selected from the group consisting of batteries, external alternating current or external direct current.

13. The device of claim 10, wherein the sensor and the wave generating device are from the same element, a speaker.

14. The device of claim 10, wherein the sensor is a microphone.