US7283923B2 — Method of speed measure on turbo superchargers of…

Claim 1

Independent Claim 263 words

Method of speed measure on a turbo supercharger of an internal combustion engine by means of vibrations analysis, comprising the steps of: measuring vibrations in said turbo supercharger, said measuring step comprising (a) incorporating software for data processing to integrate measuring equipment to a ROM memory of a computer; (b) connecting a vibration sensor to the measuring equipment and displaying the vibration sensor on a frame of a turbo-compressor; (c) entering into the measuring equipment, the number of blades of a turbo supercharger turbine and then, a number of blades of the turbo supercharger compressor; (d) initiating measuring and digitalizing of N samples of an entrance signal and storing the samples in a RAN memory; (e) obtaining frequency spectrum components of a vibration signal measured by means of FFT; (f) obtaining a PE function which together with the FFT function allows determination of a harmonic correlation function applying the following expression: CA ⁡ ( x ) = The ⁢ ⁢ biggest ⁢ ⁢ of ⁢ ⁢ 〈 CA ⁡ ( x ) k 〉 = ∏ i = 1 n ⁢ E ⁡ ( i · x + k · i / n ) · PE ⁡ ( i ) ( 9 ) Where: k=is a value between 1 and n, CA(x)=Harmonic Correlation Function, E(x)=Spectrum Function, calculated with a TRF of the sensed signal, PE=Spectral Comb Function, n=Number of harmonic to consider, x=Frequency of a value between 0 and a maximum frequency obtained in the FFT; and (g) obtaining RPM starting from a frequency corresponding to a maximum value of the CA function.

Claim 2

Dependent Claim 263 words

Method of speed measure on a turbo supercharger of an internal combustion engine by means of vibrations analysis, comprising the steps of: measuring vibrations in said turbo supercharger, said measuring step comprising (a) incorporating software for data processing to integrate measuring equipment to a ROM memory of a computer; (b) connecting a vibration sensor to the measuring equipment and displaying the vibration sensor on a frame of a turbo-compressor; (c) entering into the measuring equipment, the number of blades of a turbo supercharger turbine and then, a number of blades of the turbo supercharger compressor; (d) initiating measuring and digitalizing of N samples of an entrance signal and storing the samples in a RAN memory; (e) obtaining frequency spectrum components of a vibration signal measured by means of FFT; (f) obtaining a PE function which together with the FFT function allows determination of a harmonic correlation function applying the following expression: CA ⁡ ( x ) = The ⁢ ⁢ biggest ⁢ ⁢ of ⁢ ⁢ 〈 CA ⁡ ( x ) k 〉 = ∏ i = 1 n ⁢ E ⁡ ( i · x + k · i / n ) · PE ⁡ ( i ) ( 9 ) Where: k=is a value between 1 and n, CA(x)=Harmonic Correlation Function, E(x)=Spectrum Function, calculated with a TRF of the sensed signal, PE=Spectral Comb Function, n=Number of harmonic to consider, x=Frequency of a value between 0 and a maximum frequency obtained in the FFT; and (g) obtaining RPM starting from a frequency corresponding to a maximum value of the CA function.

Claim 3

Dependent Claim 36 words

The method of claim 1 , wherein said second number entering step comprises entering a second number which is one-half of the number of compressor blades in the event said compressor has short and long blades.

Claim 4

Dependent Claim 83 words

The method according to claim 1 , wherein obtaining of the harmonic correlation function CA is performed using the following expression: CA ⁡ ( x ) = ∑ i = 1 n ⁢ E ⁡ ( i · x ) · PE ⁡ ( i ) ( 1 ) Where: CA(x)=Harmonic Correlation Function E(x)=Spectrum Function, calculated with the FFT of the sensed signal PE=Spectral Comb Function n=number of harmonics to consider x=Frequency which varies between zero and the maximum frequency obtained by FFT.

Claim 5

Dependent Claim 51 words

The method according to claim 1 , wherein the obtaining of the harmonic correlation function CA is performed using the following expression: CA ⁡ ( x ) = ∑ i = 1 n ⁢ E ⁡ ( i · x ) · PE ⁡ ( i ) . ( 3 )

Claim 6

Dependent Claim 75 words

The method according to claim 1 , wherein the obtaining of the harmonic correlation function CA is performed using the following expression: CA ⁡ ( x ) = ∑ i = 1 n ⁢ ( ∑ j = - m m ⁢ E ⁡ ( i · x + j ) ) · PE ⁡ ( i ) ( 5 ) Where: j=increase by steps of sampled values m=half width of a strip to consider.

Claim 7

Independent Claim 171 words

A method of speed measure on a turbo supercharger of an internal combustion engine by means of vibrations analysis, comprising the steps of: measuring vibrations in said turbo supercharger comprising (a) incorporating software for data processing to integrate a measuring equipment to a ROM memory of a computer; (b) connecting an acceleration sensor to the measuring equipment and displaying said sensor in respect to a collecting frame of a compressor; (c) entering into the measuring equipment the number of blades of the turbo supercharger turbine and then, a number of blades of the turbo supercharger compressor, and a total number of blades of the compressor in order to build spectral comb function PE; (d) initiating the measuring and digitalizing of N samples of an entrance signal and storing the samples in a RAM memory; (e) obtaining frequency spectrum components of a vibration signal measured by means of EFT; (f) obtaining a harmonic correlation function CA by applying an algorithm forming said software; and (g) determining a component of a highest amplitude.

Claim 8

Independent Claim 171 words

A method of speed measure on a turbo supercharger of an internal combustion engine by means of vibrations analysis, comprising the steps of: measuring vibrations in said turbo supercharger comprising (a) incorporating software for data processing to integrate a measuring equipment to a ROM memory of a computer; (b) connecting an acceleration sensor to the measuring equipment and displaying said sensor in respect to a collecting frame of a compressor; (c) entering into the measuring equipment the number of blades of the turbo supercharger turbine and then, a number of blades of the turbo supercharger compressor, and a total number of blades of the compressor in order to build spectral comb function PE; (d) initiating the measuring and digitalizing of N samples of an entrance signal and storing the samples in a RAM memory; (e) obtaining frequency spectrum components of a vibration signal measured by means of EFT; (f) obtaining a harmonic correlation function CA by applying an algorithm forming said software; and (g) determining a component of a highest amplitude.

Claim 9

Dependent Claim 134 words

A computerized system for implementing a method of speed measure on a turbo supercharger of an internal combustion engine by means of vibrations analysis, said system comprising: a computer having a ROM memory with means for generating by applying Fourier's transformation (FFT) a spectrum of frequencies from “N” registered data; means for generating a “spectral comb” function from a fundamental component of a frequency and its “n” harmonics, means for introducing a quantity of blades of a certain turbine and compressor; means for processing both spectrum of vibration of a measured signal and a “spectral comb” function by means of a “CA” (harmonic correlation) algorithm and detecting a spectral component of maximum amplitude; and means for converting the maximum value of “CA” frequency obtained to “RPM”; and a vibration sensor connected to said computer.

Claim 10

Dependent Claim 134 words

A computerized system for implementing a method of speed measure on a turbo supercharger of an internal combustion engine by means of vibrations analysis, said system comprising: a computer having a ROM memory with means for generating by applying Fourier's transformation (FFT) a spectrum of frequencies from “N” registered data; means for generating a “spectral comb” function from a fundamental component of a frequency and its “n” harmonics, means for introducing a quantity of blades of a certain turbine and compressor; means for processing both spectrum of vibration of a measured signal and a “spectral comb” function by means of a “CA” (harmonic correlation) algorithm and detecting a spectral component of maximum amplitude; and means for converting the maximum value of “CA” frequency obtained to “RPM”; and a vibration sensor connected to said computer.

Claim 11

Dependent Claim 114 words

Equipment for performing a method of speed measure on a turbo supercharger of an internal combustion engine by means of vibrations analysis comprising: at least one sensor; a conditioning device for Analogical signals coming from the at least one sensor; an anti-aliasing, programmable low pass filter; an analog-digital converter with programmable sampling frequency; a digital signals processor that contains in a programs memory a plurality of algorithms including FFT, auto spectrum and harmonic correlation; a memory bank of pre signal processing to store acquired samples; a digital screen for presenting results and for introducing configuration parameters; a program memory containing all digital functions for implementing a method of harmonic correlation; and a communication port.

Claim 12

Dependent Claim 114 words

Equipment for performing a method of speed measure on a turbo supercharger of an internal combustion engine by means of vibrations analysis comprising: at least one sensor; a conditioning device for Analogical signals coming from the at least one sensor; an anti-aliasing, programmable low pass filter; an analog-digital converter with programmable sampling frequency; a digital signals processor that contains in a programs memory a plurality of algorithms including FFT, auto spectrum and harmonic correlation; a memory bank of pre signal processing to store acquired samples; a digital screen for presenting results and for introducing configuration parameters; a program memory containing all digital functions for implementing a method of harmonic correlation; and a communication port.

Claim 13

Dependent Claim 30 words

The equipment according to claim 8 , wherein said at least one sensor comprises at least one of an acceleration sensor, a speed sensor, and a laser vibration technology sensor.

Claim 14

Dependent Claim 62 words

The equipment according to claim 8 , wherein the at least one sensor comprises a vibration sensor and further comprising a signal conditioning device including an electronic analogical circuit adaptor of tension (voltage) or load (charge) levels coming from the vibration sensor whose output provides a signal with an appropriate range of tension (voltage) for input to the filter and the converter.

Claim 15

Dependent Claim 30 words

The equipment according to claim 8 , wherein the anti-aliasing low pass filter has a programmable cut frequency and a diminishing slope in a −24 dB per octave passing band.

Claim 16

Dependent Claim 39 words

The equipment according to claim 8 , wherein the analog-digital converter with programmable sampling frequency acquires a sample of an analog signal, quantifies said analog signal and codes said analog signal in a digital binary value of 12 bits.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2010-10-15	2011-04-16	2011-10-16	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2014-10-15	2015-04-16	2015-10-16	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2018-10-15	2019-04-16	2019-10-16	$7700.00	Window Closed / Lapsed

Method of speed measure on turbo superchargers of internal combustion engines by means of vibrations analysis and equipment to perform it

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