CN2876749Y - Multifunctional bearing vibration tester - Google Patents

Abstract

The utility model relates to the technological field of bearing vibration measurement, which provides a multifunctional bearing vibration tester. It converts bearing vibration acceleration quantity and speed quantity into electric signal through a piezoelectric acceleration transducer and a dynamic type speed sensor. Through a signal processing circuit, the electric signal is sent into a multi-channel data acquisition unit, and then is converted into digital signal. The digital signal is sent into computer for subsequent treatment and analysis to realize the precision measurement, analysis and fault diagnosis. The multifunctional bearing vibration tester of the utility model not only can test bearing vibration acceleration quantity, but also bearing vibration speed quantity. The design of wave filter of the signal processing circuit adopts integrated variable filter, which is good for debugging and maintenance of measuring system. Compared with conventional RC wave filter, it reduces temperature-drift and time-drift. It performs gain control on integrated programmed amplifier, adopts photo-coupler isolation mode to eliminate the influence from the difference of earth potential, and enhances the capacity of resisting disturbance of the device.

Description

A kind of multifunction bearing vibration measurement device

Technical field:

The utility model relates to the bear vibration technical field of measurement and test, particularly a kind of multifunction bearing vibration measurement device.

Background technology:

The 6th phase of volume calendar year 2001 the 18th, on the electromechanical engineering magazine, deliver " vibration monitoring of rolling bearing and Study on Fault Diagnosis " by Wang Zhuo etc., the characteristics of this technology are: adopt piezoelectric accelerometer to carry out vibration-testing, utilize microcomputer to carry out Data Management Analysis.This system is suitable for the status monitoring and the diagnosis of rolling bearing experimental machine and large-scale key equipment rolling bearing, and diagnostic function is single, is not suitable for the precision monitoring and analysis of bearing producer to the bear vibration quality of dispatching from the factory.2003 the 6th phases, on bearing magazine, deliver " detection of bear vibration and abnormal sound " by Wang Jialiang etc., its technical characterstic is: adopt chip microprocessor to carry out computing to detecting data, provide vibration values, peak factor and umber of pulse parameter.This mode is a chip microprocessor owing to what adopt, and command function and arithmetic speed are limited, and the expansion of measuring instrument integrated testability function is limited.

At present from domestic, the classification and Detection that Production of bearing producer dispatches from the factory to bearing generally uses acceleration type or velocity profile vibration measuring set to detect, the electrical system of this quasi-instrument adopts analog signal processing technology mostly, only provide some parameter of vibration signal amplitude domain, as: effective value, peak value etc., function singleness can't be analyzed the different sound of identification bearing and the position that fault exists, and is not easy to the production technology of bearing is carried out complementary monitoring.

The height of bearing products performance and precision detects by instrument and judges, whether the bearing detecting instrument is advanced, will directly have influence on reliability and the accuracy that bearing products detects.Along with the continuous development of bearing industry, the vibration noise quality requirements of rolling bearing is improved constantly.Correspondingly Production of bearing producer also improves the requirement of bearing vibration measuring instrument thereupon.At present in the industry bear vibration is carried out acceleration type and velocity profile when measuring, acceleration type and velocity profile surveying instrument can only be quantitatively and quality that can not the qualitatively analyze bearing, along with the continuous progress of bearing manufacturing technology level, these two kinds of instruments obviously can not adapt to the needs of production.

If can provide a kind of bear vibration, different cent are analysed to be measurement mechanism one, that merge amount of acceleration and speed amount, the technological gap that can not accurately measure the vibration noise quality problems of rolling bearing that perplexs Production of bearing producer for a long time will be filled up.Weak point to sum up of the prior art the utility model proposes a kind of multifunction bearing vibration measurement device.

The utility model content:

When bearing being dispatched from the factory classification and Detection at Production of bearing producer the acceleration type or the velocity profile vibration measuring set that generally use, adopt analog signal processing technology mostly, signal Processing is accurate inadequately, and problems such as measurement function is single, the utility model provides a kind of multifunction bearing vibration measurement device, it is accurate test bearing vibration acceleration amount both, accurate test bearing vibration velocity amount again, after data collecting card A/D conversion, be sent to and carry out follow-up data analysis in the computing machine, to reach the purpose of bear vibration being carried out precision measurement and analysis.

A kind of multifunction bearing vibration measurement device, comprising: signal conditioning circuit that links to each other with rolling bearing and the data collecting card that carries out data A/D conversion and transmit; Wherein, signal conditioning circuit comprises acceleration type bear vibration metering circuit and velocity profile bear vibration metering circuit, after signal conditioning circuit is gathered acceleration and velocity survey signal, analog input channel by data collecting card is sent into data collecting card, after carrying out A/D conversion, be sent to by data acquisition card digital amount delivery outlet and carry out subsequent treatment in the computing machine.

Described multifunction bearing vibration measurement device, wherein, described acceleration type bear vibration metering circuit comprises piezoelectric acceleration transducer (1), preposition charge amplifier (2), integrated state variable filter (4), audio amplifier (6), integrated programmable amplifier (7) and two operational amplifiers (3) and (5); Wherein, piezoelectric acceleration transducer (1) picks up after bearing vibration signal supplies with preposition charge amplifier (2) and amplify, amplify through operational amplifier (3) again, send into integrated state variable filter (4) signal is carried out filtering, after the useless or undesired signal of elimination, signal is divided into two-way: the one tunnel delivers to audio amplifier (6) after operational amplifier (5) amplifies; One the tunnel sends into the simulating signal input channel 0 of data collecting card (23) after integrated programmable amplifier (7) amplifies.

Described multifunction bearing vibration measurement device, wherein, the enlargement factor of described integrated programmable amplifier (7) is controlled by computer program.

Described multifunction bearing vibration measurement device, wherein, described velocity profile bear vibration metering circuit comprises electrodynamic type speed pickup (12), isolating transformer (13), integrated state variable filter (15), audio amplifier (17) and integrated programmable amplifier (18), and two operational amplifiers (14), (16); After electrodynamic type speed pickup (12) picks up bearing vibration signal supply isolating transformer (13) amplification, amplify through operational amplifier (14) again, send into integrated state variable filter (15) signal is carried out pre-filtering, after the useless or undesired signal of elimination, signal is divided into two-way: the one tunnel delivers to audio amplifier (17) after operational amplifier (16) amplifies; One the tunnel sends into the simulating signal input channel 1 of data collecting card (23) after integrated programmable amplifier (18) amplifies.

Described multifunction bearing vibration measurement device, wherein, the enlargement factor of described integrated programmable amplifier (18) is controlled by computer program.

Adopt technical scheme provided by the utility model, will reach following good effect:

(1) multifunction bearing vibration measurement device provided by the utility model integrates two major types vialogs (acceleration type and velocity profile) function in the bearing industry, but both test bearing vibration acceleration amounts, but test bearing vibration velocity amount again.

(2) integrated state variable filter is adopted in signal conditioning circuit median filter design, has made things convenient for the debugging and the maintenance of measuring system, compares with traditional RC wave filter, reduced temperature float with the time float.

(3) integrated programmable amplifier is carried out gain control, adopt the photoelectric coupler isolation mode, eliminate the influence that the earth potential difference is produced, improved the antijamming capability of system.

(4) multifunction bearing vibration measurement device provided by the utility model, by the low noise signal conditioning circuit bearing vibration signal is carried out pre-service, with data collecting card as the I/O interfacing equipment between signal conditioning circuit and the computing machine, and the simulating signal of signal conditioning circuit input is carried out A/D change, be converted to the treatable digital signal of computing machine, carry out the subsequent treatment and the analysis of data with stable performance, computing machine that data-handling capacity is powerful, to reach the purpose of bear vibration being carried out precision measurement and analysis.

(5) multifunction bearing vibration measurement device provided by the utility model, also have and utilize the function of computing machine rolling bearing fault automatic diagnosis, be to utilize computing machine that bear vibration is carried out test analysis and kurtosis analysis, and by Design of Virtual Instrument and Digital Signal Processing, automatically kurtosis value is calculated by software, carry out the spectrum analysis of cepstrum again, relatively, can only can finish test to general operating personnel by the mechanical part of simple operations vialog, and show its result by display, it identifies that fault is accurate, easy to operate, visual good.

Description of drawings:

Figure 1 shows that multifunction bearing vibration measurement device circuit block diagram;

Figure 2 shows that multifunction bearing vibration measurement device circuit structure schematic diagram;

Figure 3 shows that the process flow diagram of computing machine to acceleration and velocity survey analysis;

Fig. 4 (a) is depicted as computing machine acceleration is measured the display process process flow diagram in real time;

Fig. 4 (b) is depicted as computing machine acceleration is interrupted the Measurement and analysis processing flow chart;

Fig. 4 (c) is depicted as computing machine to acceleration information analyzing and processing process flow diagram;

Fig. 5 (a) is depicted as computing machine speed is measured the display process process flow diagram in real time;

Fig. 5 (b) is depicted as computing machine speed is interrupted the Measurement and analysis processing flow chart;

Fig. 5 (c) is depicted as computing machine to speed data analyzing and processing process flow diagram;

Figure 6 shows that computing machine is to rolling bearing fault automatic diagnosis process flow diagram.

Drawing reference numeral

1---piezoelectric acceleration transducer; 2---charge amplifier;

3---operational amplifier; 4---and integrated state variable bandpass filter (50HZ～10000HZ);

5---operational amplifier; 6---audio amplifier; 7---integrated programmable amplifier;

8---photoelectrical coupler; 9---integrated drive

10---photoelectrical coupler; 11---integrated drive

12---the electrodynamic type speed pickup; 13---the transformer isolation amplifier; 14---operational amplifier;

15---and integrated state variable bandpass filter (50HZ～10000HZ);

16---operational amplifier; 17---audio amplifier

18---integrated programmable amplifier; 19---photoelectrical coupler; 20---integrated drive

21---photoelectrical coupler; 22---integrated drive

23---ADLINK PCI-9112 data collecting card

24---computing machine

Embodiment:

The utility model provides a kind of multifunction bearing vibration measurement device, both accurate test bearing vibration acceleration amounts, accurate test bearing vibration velocity amount again, bear vibration amount of acceleration and speed amount sent into by data collecting card carry out follow-up processing and analysis in the computing machine, to reach the purpose of bear vibration being carried out precision measurement and analysis.

Described multifunction bearing vibration measurement device, by piezoelectric acceleration transducer, electrodynamic type speed pickup bear vibration is measured respectively, change bear vibration amount of acceleration, speed amount into electric signal, after this electric signal passes through signal condition (preposition amplification, antialiasing filter, digital program controlled amplification) again, send into hyperchannel integrated data capture card, be transformed into the treatable digital signal of computing machine, again digital signal sent into computing machine; Computing machine is handled and is analyzed data.

A kind of multifunction bearing vibration measurement device provided by the utility model, comprising: signal conditioning circuit that links to each other with rolling bearing and the data collecting card ADLINKPCI-9112 that carries out data A/D conversion and transmit; Wherein, signal conditioning circuit comprises acceleration type bear vibration metering circuit and velocity profile bear vibration metering circuit, after signal conditioning circuit is gathered acceleration and velocity survey signal, analog input channel by data collecting card is sent into data collecting card, after carrying out the A/D conversion, by carrying out subsequent treatment in the data acquisition card digital amount delivery outlet input computing machine.

Be illustrated in figure 1 as multifunction bearing vibration measurement device circuit block diagram.

Piezoelectric acceleration transducer (1) picks up after bearing vibration signal supplies with preposition charge amplifier (2) and amplify, amplify through operational amplifier (3) again, send into integrated state variable filter (4) again signal is carried out pre-filtering, after the useless or undesired signal of elimination, signal is divided into two-way: the one tunnel delivers to audio amplifier (6) after operational amplifier (5) amplifies, so that the user monitors rattle; One the tunnel sends into the simulating signal input channel 0 of data collecting card ADLINK PCI-9112 (23) after integrated programmable amplifier (7) amplifies.

The acceleration type bear vibration metering circuit of multifunction bearing vibration measurement device is as shown in the figure: electrodynamic type speed pickup (12) picks up after bearing vibration signal supplies with isolating transformer (13) and amplify, amplify through operational amplifier (14) again, send into integrated state variable filter (15) again signal is carried out pre-filtering, after the useless or undesired signal of elimination, signal is divided into two-way: the one tunnel delivers to audio amplifier (17) after operational amplifier (16) amplifies, so that the user monitors rattle; One the tunnel sends into the simulating signal input channel 1 of data collecting card ADLINK PCI-9112 (23) after integrated programmable amplifier (18) amplifies.

Data collecting card PCI-9112 (23) is based on the pci card of 32 bit strip bus master functions, has multiple functions such as analog quantity input and output, digital quantity input and output.

The multifunction bearing vibration measurement device is by digital quantity delivery outlet DO0, the DO1 of computer program control PCI-9112 card, by driven in phase device (9) (11) and photoelectrical coupler (8) (10), realize two signal gain selecting sides of programmable amplifier PGA103 (7) are controlled; Digital quantity delivery outlet DO2, DO3 realize two signal gain selecting sides of programmable amplifier PGA103 (18) are controlled respectively by driven in phase device (20) (22) and photoelectrical coupler (19) (21); Realization is carried out gain control to programmable amplifier.Adopt this kind mode, play the effect of isolation mode analog signal ground wire and digital signal ground wire, eliminate the influence that the earth potential difference is produced, improved the antijamming capability of system.System utilizes the analog input channel 0 sampling bear vibration amount of acceleration of PCI-9112 card, analog input channel 1 sampling bear vibration speed amount, be transformed into the treatable digital signal of computing machine, by the data acquisition card driver, digital signal enters computing machine, computing machine is handled and is analyzed data again, realizes the test analysis function to bearing.

The multifunction bearing vibration measurement device carries out pre-service by the low noise signal conditioning circuit to bearing vibration signal, carry out the subsequent treatment of data with stable performance, computing machine (24) that data-handling capacity is powerful, realize multifunctional testing analysis as the I/O interfacing equipment bear vibration with ADLINK PCI-9112 data collecting card (23).

Be illustrated in figure 2 as multifunction bearing vibration measurement device circuit structure schematic diagram:

The circuit part that acceleration type bear vibration in the multifunction bearing vibration measurement device is measured is: the vibration signal that piezoelectric acceleration transducer picks up is supplied with the charge amplifier that integrated operational amplifier IC1 constitutes, C1 is the charge amplifier feedback capacity, R1 is the charge amplifier feedback resistance, and the DC feedback of providing is provided feedback resistance R1, reduce drift, make the effect of charge amplifier working stability.The operational amplifier that the IC1 signal output part connects integrated operational amplifier IC2 formation amplifies signal, IC2 signal output part 6 meets integrated state variable filter MAX274 signal input part INA by resistance R 5, MAX274 and outer meeting resistance R6～R20 have constituted eight rank bandpass filter (50Hz～10000Hz), elimination garbage signal and undesired signal, the signal of MAX274 output terminal BPOD divides two-way, one the tunnel connects the signal amplification circuit that IC3 constitutes, and signal is amplified, and the IC3 signal output part connects audio amplifier; One the tunnel meets programmable amplifier PGA103 signal input part VIN.PGA103 signal output part VOUT meets the passage A/0 of PCI9112 card CN1 connector.

The circuit part that velocity profile bear vibration in the multifunction bearing vibration measurement device is measured is: the vibration signal that the electrodynamic type speed pickup picks up is supplied with the transformer isolation amplifier, after signal amplified, by the operational amplifier that constitutes by IC4 signal is amplified again, IC4 signal output part 6 meets integrated state variable filter MAX274 signal input part INA by resistance R 31, MAX274 and outer meeting resistance R32～R46 have constituted eight rank bandpass filter (50Hz～10000Hz), elimination garbage signal and undesired signal, the signal of MAX274 output terminal BPOD divides two-way, one the tunnel connects the signal amplification circuit that IC5 constitutes, signal is amplified, and the IC5 signal output part connects audio amplifier; One the tunnel meets programmable amplifier PGA103 signal input part VIN.PGA103 signal output part VOUT meets the passage A/1 of PCI9112 card CN1 connector.

Data collecting card PCI-9112 (23) is based on the pci card of 32 bit strip bus master functions, digital quantity delivery outlet DO0, DO1 be respectively by driven in phase device 7407 and optocoupler 4n25, realizes two signal gain selecting side A0 and the A1 of programmable amplifier PGA103 are controlled; Digital quantity delivery outlet DO2, DO3 be respectively by driven in phase device 7407 and optocoupler 4n25, realizes two signal gain selecting side A0 and the A1 of programmable amplifier PGA103 are controlled.Utilize the PCI09112 snap gauge to intend input channel 0 sampling bear vibration amount of acceleration, utilize analog input channel 1 sampling bear vibration speed amount, analog-signal transitions is become the treatable digital signal of computing machine, by the data acquisition card driver, digital signal enters computing machine, and computing machine is handled and analyzed data again.

In addition, the gain of integrated programmable amplifier PGA103 (7) and (18) is controlled by computer program, and it can provide 1,10,100 multiplying powers, promptly 0,20, the gain of 40dB.Digital quantity delivery outlet DO0, the DO1 of a computer program control data capture card PCI-9112, by driven in phase device (9) (11) and photoelectrical coupler (8) (10), realize two signal gain selecting sides of programmable amplifier PGA103 (7) are controlled; In addition, digital quantity delivery outlet DO2, the DO3 of another computer program control data capture card PCI-9112, respectively by driven in phase device (20) (22) and photoelectrical coupler (19) (21), realization is controlled two signal gain selecting sides of programmable amplifier PGA103 (18), realizes programmable amplifier is carried out gain control.Adopt this kind mode, play the effect of isolation mode analog signal ground wire and digital signal ground wire, eliminate the influence that the earth potential difference is produced, improve the antijamming capability of device circuit.

Figure 3 shows that the process flow diagram of computing machine to acceleration and velocity survey analysis; As shown in Figure 3, behind the system initialization, computer display shows that amount of acceleration Measurement and analysis/speed measures component analysis and selects the interface, and prompting selects amount of acceleration Measurement and analysis module to carry out the Measurement and analysis of amount of acceleration, and perhaps selection speed measures the Measurement and analysis that the component analysis module is carried out the speed amount.

Described amount of acceleration Measurement and analysis module comprises: bearing information parameter module is set, and change sampling parameter module, change is drawn and is distinguished parameter module, is provided with and measures the range module, and acceleration is measured display module in real time, and acceleration interrupts the Measurement and analysis module; In amount of acceleration Measurement and analysis module, to draw district's parameter module and set and measure being provided with of range and measure the range module of the bearing information parameter module that sets parameter, change sampling parameter module, change, show on the indicator screen and measure button, Measurement and analysis button and exit button in real time;

The described bearing information parameter module that is provided with is used for input to information such as bearing designation, producers, determines steel ball size, the footpath, center of measured bearing, bearing informations parameter such as bearing contact angle.

Change sampling parameter module is used for information such as sample frequency, sampling time are set.

Be provided with measure the range module to the acceleration information that receives be divided into 40,60, three shelves of 80db, correspond respectively to 100 times, 10 times and 1 times of three enlargement factors of integrated programmable amplifier (7), be that integrated programmable amplifier PGA103 (7) can provide 1,10,100 multiplying powers, promptly 0,20, the gain of 40dB.The digital quantity delivery outlet DO0, the DO1 that measure range module controls data collecting card PCI-9112 are set, by driven in phase device (9) (11) and photoelectrical coupler (8) (10), realize two signal gain selecting sides of programmable amplifier PGA103 (7) are controlled.Adopt this kind mode, play the effect of isolation mode analog signal ground wire and digital signal ground wire, eliminate the influence that the earth potential difference is produced, improve the antijamming capability of system.

On indicator screen, to press demonstration and measure button in real time, acceleration is measured display module work in real time, shows the acceleration real-time measuring data on the indicator screen; Press the Measurement and analysis button, acceleration interrupts the work of Measurement and analysis module; Press exit button, the power cut-off of amount of acceleration Measurement and analysis module, indicator screen is return amount of acceleration Measurement and analysis module/speed and is measured component analysis module selection interface.

Be depicted as acceleration as Fig. 4 (a) and measure the display module processing flow chart in real time, described acceleration is measured in real time and is comprised data acquisition module, digital filtering module, computing module and data disaply moudle in the display module; After acceleration is measured display module work in real time, show on the indicator screen and finish the sampling button; As shown in the figure, acceleration is measured display module in real time and is started working, the real-time image data of data acquisition module, the data of the enough spaces of calculator memory buffer scheduling storage of collected, reading of data is to the user buffering district, digital filtering module reads the data in the user buffering district and carries out digital filtering, computing module reads the filtered data of digital filtering module and calculates the effective value of 50 ~ 10000Hz frequency range, peak value, crest frequency, peak factor, kurtosis coefficient uniform acceleration sampled measurements data, data disaply moudle read these acceleration sampled measurements data and deliver on the indicator screen and show.

The present invention adopts double buffering technology to realize the collection of high capacity vibration data, and the speed of image data is accelerated greatly.

Fig. 4 (b) is depicted as acceleration and interrupts Measurement and analysis resume module process flow diagram, and described acceleration interrupts comprising data acquisition module, waveform display module, digital filtering module, computing module, data disaply moudle and acceleration information analysis module in the Measurement and analysis module; As shown in the figure, after acceleration interrupted the work of Measurement and analysis module, the data collecting module collected data were finished up to data sampling; The waveform display module read adopt data, on computer display screen, show the waveform that institute's sampled data forms; Digital filtering module reads sampled data and to this data filtering, computing module reads filtered data and calculates the effective value of 50 ~ 10000Hz frequency range, peak value, crest frequency, peak factor, kurtosis coefficient uniform acceleration measurement parameter, and data disaply moudle reads this acceleration analysis parameter and delivers on the indicator screen and shows; Display data analysis button, data save button and exit button on the indicator screen: press the data analysis button, the acceleration information analysis module is started working; Press the data save button, current data is stored in the calculator memory.

Fig. 4 (c) is depicted as acceleration information analysis module processing flow chart, and described acceleration information analysis module comprises power spectrum computing module, power spectrum spectrogram display module, cepstrum computing module, cepstrum spectrogram display module; Envelope demodulation computing module, envelope spectrogram display module, wavelet decomposition computing module, small echo spectrogram display module, WAVELET PACKET DECOMPOSITION computing module, wavelet packet spectrogram display module; Rated output spectrum module reads described acceleration analysis parameter, calculates its power spectrum data, and power spectrum spectrogram display module reads this power spectrum data, and the power spectrum spectrogram is presented on the indicator screen; Cepstrum computing module readout power spectrum data are also calculated its cepstrum data, and cepstrum spectrogram display module reads this cepstrum data, and the cepstrum spectrogram is presented on the indicator screen; The envelope demodulation computing module reads the cepstrum data and calculates its envelope and the envelope spectrum data, and envelope spectrogram display module reads this envelope and envelope spectrum data, and the envelope spectrogram is presented on the indicator screen; The wavelet decomposition computing module reads envelope and envelope spectrum data and calculates its wavelet decomposition data, and small echo spectrogram display module reads wavelet decomposition data and little wave spectrogram is presented on the indicator screen; The WAVELET PACKET DECOMPOSITION computing module reads wavelet decomposition data, and calculates its WAVELET PACKET DECOMPOSITION data, and wavelet packet spectrogram display module reads this WAVELET PACKET DECOMPOSITION data, and the wavelet packet spectrogram is presented on the indicator screen.

As shown in Figure 3, described speed measures the component analysis module and comprises bearing information parameter module is set, change sampling parameter module, and the change district's parameter module of drawing is provided with and measures the range module, and speed is measured display module in real time, and speed is interrupted the Measurement and analysis module; Measure in the component analysis module in speed, to draw district's parameter module and set and measure being provided with of range and measure the range module of the bearing information parameter module that sets parameter, change sampling parameter module, change, show on the indicator screen and measure button, Measurement and analysis button and exit button in real time.

The described bearing information parameter module that is provided with is used for input to information such as bearing designation, producers, determines steel ball size, the footpath, center of measured bearing, bearing informations parameter such as bearing contact angle.

Change sampling parameter module is used for information such as sample frequency, sampling time are set.

Be provided with measure the range module to the acceleration information that receives be divided into 40,60, three shelves of 80db, correspond respectively to 100 times, 10 times and 1 times of three enlargement factors of integrated programmable amplifier (18) in the acceleration type bear vibration measurement module, be that integrated programmable amplifier PGA103 (18) can provide 1,10,100 multiplying powers, promptly 0,20, the gain of 40dB.Gain control to programmable amplifier (18), the digital quantity delivery outlet DO2, the DO3 that measure range module controls data collecting card PCI-9112 are set, respectively by driven in phase device (20) (22) and photoelectrical coupler (19) (21), realization is controlled two signal gain selecting sides of programmable amplifier PGA103 (18), realizes the gain control to programmable amplifier.Adopt this kind mode, play the effect of isolation mode analog signal ground wire and digital signal ground wire, eliminate the influence that the earth potential difference is produced, improved the antijamming capability of system.

Be depicted as speed as Fig. 5 (a) and measure the display module processing flow chart in real time, speed is measured in real time and is comprised data acquisition module, digital filtering module, computing module and data disaply moudle in the display module; After speed is measured display module work in real time, show on the indicator screen and finish the sampling button; As shown in the figure, after speed is measured display module work in real time, the real-time image data of data acquisition module, the data of the enough spaces of calculator memory buffer scheduling storage of collected, reading of data is to the user buffering district, digital filtering module reads the data in the user buffering district and carries out digital filtering, computing module reads the filtered data of digital filtering module and calculates low, in, high, the effective value of full frequency band, peak value, peak factor, kurtosis coefficient uniform velocity sampled measurements data, data disaply moudle read the speed sampling measurement data that calculates and deliver on the indicator screen and show.

Fig. 5 (b) is depicted as speed and interrupts Measurement and analysis resume module process flow diagram, and speed interrupts comprising in the Measurement and analysis module: data acquisition module, waveform display module, digital filtering module, computing module, data disaply moudle and speed data analysis module; As shown in the figure, after speed was interrupted the work of Measurement and analysis module, the data collecting module collected data were finished up to data sampling; The waveform display module read adopt data, on computer display screen, show the waveform that institute's sampled data forms; Digital filtering module reads sampled data and to this data filtering, computing module reads filtered data and calculates basic, normal, high, the effective value of full frequency band, peak value, peak factor, kurtosis coefficient uniform velocity measurement parameter, and data disaply moudle reads this velocity survey parameter and delivers on the indicator screen and shows; Display data analysis button, data save button and exit button on the indicator screen: press the data analysis button, the speed data analysis module is started working; Press the data save button, current data is stored in the calculator memory.

Fig. 5 (c) is depicted as speed data analysis module processing flow chart, and the speed data analysis module comprises power spectrum computing module, power spectrum spectrogram display module, cepstrum computing module, cepstrum spectrogram display module; Envelope demodulation computing module, envelope spectrogram display module, wavelet decomposition computing module, small echo spectrogram display module, WAVELET PACKET DECOMPOSITION computing module, wavelet packet spectrogram display module; As shown in the figure, rated output spectrum module reads described velocity survey parameter, calculates its power spectrum data, and power spectrum spectrogram display module reads this power spectrum data, and the power spectrum spectrogram is presented on the indicator screen; Cepstrum computing module readout power spectrum data are also calculated its cepstrum data, and cepstrum spectrogram display module reads this cepstrum data, and the cepstrum spectrogram is presented on the indicator screen; The envelope demodulation computing module reads the cepstrum data and calculates its envelope and the envelope spectrum data, and envelope spectrogram display module reads this envelope and envelope spectrum data, and the envelope spectrogram is presented on the indicator screen; The wavelet decomposition computing module reads envelope and envelope spectrum data and calculates its wavelet decomposition data, and small echo spectrogram display module reads wavelet decomposition data and little wave spectrogram is presented on the indicator screen; The WAVELET PACKET DECOMPOSITION computing module reads wavelet decomposition data, and calculates its WAVELET PACKET DECOMPOSITION data, and wavelet packet spectrogram display module reads this WAVELET PACKET DECOMPOSITION data, and the wavelet packet spectrogram is presented on the indicator screen.

Be illustrated in figure 6 as the process flow diagram of computing machine to rolling bearing fault automatic diagnosis, the vibration signal of measured bearing through acceleration and speed pickup M pick up supply with front end circuit and handle after, enter into A/D converter through programmable amplifying circuit again and carry out the conversion of simulating signal to digital signal, then the digital signal after the conversion is input to the buffer system stored of computer system, the computer system corresponding module is also controlled the process of programmable amplifying circuit and A/D converter, and the intrasystem kurtosis computation analysis module of simultaneous computer is utilized the mathematical model of kurtosis $K=N\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{x_i}^4/\sqrt{\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{x_i}^2}$ In computing machine, the vibration signal that is stored in buffer zone behind amount of acceleration Measurement and analysis module and speed measurement component analysis module analysis is carried out computing by software, this mathematical model is the quadravalence statistical moment of vibration signal amplitude Density Distribution, wherein: K is a kurtosis degree value, N is a sampling number, and Xi is each sampled point; For good bear vibration amplitude Normal Distribution, corresponding kurtosis value should be about 3; When bearing sustained damage, variation had taken place in the distribution of its vibration amplitude, had promptly departed from normal distribution, and this moment, statistical property one kurtosis value of vibration signal amplitude distribution also can increase rapidly, if kurtosis value greater than 3, is promptly indicating the damage of bearing; Thereby vibration signal processing conversion and frequency computation part comparison module in the computer system utilize the cepstrum calculation mathematic model $x\left(n\right)\→\left[\mathrm{DFT}\right]\stackrel{x\left(k\right)}{\→}\left[\ln \right[\left]\right]\stackrel{{\hat{x}}_{\left(k\right)}}{\→}\left[\mathrm{IDFT}\right]{\→\hat{x}}_p\left(n\right)$ By software the vibration signal that is stored in buffer zone behind amount of acceleration Measurement and analysis module and speed measurement component analysis module analysis is carried out computing in computing machine, its process is: sad conversion in the input signal richness is after log-transformation is carried out the spectrogram that sad conversion obtains in the contrary richness again; Intrasystem vibration signal processing conversion of simultaneous computer and frequency computation part comparison module utilize the characteristic frequency of rolling bearing and the formula of mathematical of each position frequency of components of bearing to calculate:

$\mathrm{<figure-callout\; id="1"\; label="f"\; filenames="Y20062003147200191.png"\; state="\{\{state\}\}">f</figure-callout>}1=n/60$

$\mathrm{<figure-callout\; id="2"\; label="f"\; filenames="Y20062003147200191.png"\; state="\{\{state\}\}">f</figure-callout>}2=\mathrm{<figure-callout\; id="1"\; label="Z\; f"\; filenames="Y20062003147200191.png"\; state="\{\{state\}\}">Z</figure-callout>}\frac{f}{}\frac{1}{2}(1+\frac{D_w\cos \mathrm{\&alpha;}}{D_m})$

$\mathrm{<figure-callout\; id="3"\; label="f"\; filenames="Y20062003147200191.png"\; state="\{\{state\}\}">f</figure-callout>}3=\mathrm{<figure-callout\; id="1"\; label="Z\; f"\; filenames="Y20062003147200191.png"\; state="\{\{state\}\}">Z</figure-callout>}\frac{f}{}\frac{1}{2}(1-\frac{D_w\cos \mathrm{\&alpha;}}{D_m})$

$\mathrm{<figure-callout\; id="4"\; label="f"\; filenames="Y20062003147200191.png"\; state="\{\{state\}\}">f</figure-callout>}4=f1\frac{D_m}{D_w}\left[1-{\left(\frac{D_w\cos \mathrm{\&alpha;}}{D_m}\right)}^2\right]$

$f5=\frac{\mathrm{<figure-callout\; id="1"\; label="f"\; filenames="Y20062003147200191.png"\; state="\{\{state\}\}">f</figure-callout>}1}{2}(1-\frac{D_w\cos \mathrm{\&alpha;}}{D_m})$

Wherein: f1, f2, f3, f4, f5 are respectively that fundamental frequency, inner ring, outer ring, steel ball and retainer cause the bear vibration fault characteristic frequency; Z is the steel ball number, and n is bearing velocity of rotation (rpm), and D ω is a steel ball size, and Dm is footpath, steel ball center, and α is a bearing contact angle; Its calculation value all can be presented on the display of computing machine, the frequency of the vibration signal processing conversion in the last computer system and the frequency amplitude maximum point of cepstrum oscillogram behind spectrum analysis of automatic comparison system of frequency computation part comparison module utilization and out of order bearing compares, just can conclude the concrete parts that bearing fault occurs, by diagnostic system the result is presented on the display simultaneously, and can demonstrates the degree of injury of damage of the bearing parts.

From the above mentioned, adopt technical scheme provided by the utility model, will reach following good effect:

(1) Multifunctional bearing vibration tester provided by the utility model, collection Zhou holds two big types in the Hang Ye Vialog: acceleration type is Yu velocity profile function Yu Yi body, but both test bearing vibration acceleration amounts You can be surveyed Examination bear vibration speed amount.

(2) integrated state variable filter is adopted in the design of signal conditioning circuit median filter, has made things convenient for measuring system Debugging Yu Wei Xiu, Yu tradition RC wave filter Xiang ratio, reduced to float when Wen floats Yu.

(3) integrated programmable amplifier carry out gain control Zhi, adopt the photoelectric coupler isolation mode, Xiao is except the ground electricity The Ying Xiang that the Wei difference produces has improved the antijamming capability that Xi unites.

(4) Multifunctional bearing vibration tester provided by the utility model is by the low noise signal condition Circuit carries out Yu to bearing vibration signal to be processed, take data collecting card Zuo as signal conditioning circuit with computer Zhi Between the I/O interface equipment, and the analog signal of signal conditioning circuit input is carried out A/D Zhuan changes, Zhuan is changed to The treatable data signal of computer, Yi can carry out data by Wen computer fixed, that data-handling capacity is powerful Subsequent treatment and analysis, Yi reaches the purpose of bear vibration being carried out accurate measurement.

(5) Multifunctional bearing vibration tester provided by the utility model, its rolling bearing fault Zi is moving Diagnostic function is to utilize computer that bear vibration is carried out test analysis and kurtosis analysis, and intends Yi by Xu Device design and Digital Signal Processing, You software Zi is moving calculates kurtosis value, and Zai carries out cepstrum Spectrum analysis, comparison, to the operating personnel as the Yi can Zhi by the simple operations vialog mechanical part namely Can finish test, and show that by Xian device Xian shows its result, it identifies that fault Zhun is true, easy to operate, visuality Good.

Claims (5)

1, a kind of multifunction bearing vibration measurement device is characterized in that: comprising: signal conditioning circuit that links to each other with rolling bearing and the data collecting card that carries out data A/D conversion and transmit; Wherein, signal conditioning circuit comprises acceleration type bear vibration metering circuit and velocity profile bear vibration metering circuit, after signal conditioning circuit is gathered acceleration and velocity survey signal, analog input channel by data collecting card is sent into data collecting card, after carrying out the A/D conversion, send into subsequent treatment and the analysis of carrying out data in the computing machine by data acquisition card digital amount delivery outlet.

2, multifunction bearing vibration measurement device as claimed in claim 1, it is characterized in that: described acceleration type bear vibration metering circuit comprises piezoelectric acceleration transducer (1), preposition charge amplifier (2), integrated state variable filter (4), audio amplifier (6), integrated programmable amplifier (7) and two operational amplifiers (3) and (5); Wherein, piezoelectric acceleration transducer (1) picks up after bearing vibration signal supplies with preposition charge amplifier (2) and amplify, amplify through operational amplifier (3) again, send into integrated state variable filter (4) signal is carried out filtering, after the useless or undesired signal of elimination, signal is divided into two-way: the one tunnel delivers to audio amplifier (6) after operational amplifier (5) amplifies; One the tunnel sends into the simulating signal input channel 0 of data collecting card (23) after integrated programmable amplifier (7) amplifies.

3, multifunction bearing vibration measurement device as claimed in claim 2 is characterized in that: the enlargement factor of described integrated programmable amplifier (7) is controlled by computer program.

4, multifunction bearing vibration measurement device as claimed in claim 1, it is characterized in that: described velocity profile bear vibration metering circuit comprises electrodynamic type speed pickup (12), isolating transformer (13), integrated state variable filter (15), audio amplifier (17) and integrated programmable amplifier (18), and two operational amplifiers (14), (16); After electrodynamic type speed pickup (12) picks up bearing vibration signal supply isolating transformer (13) amplification, amplify through operational amplifier (14) again, send into integrated state variable filter (15) signal is carried out pre-filtering, after the useless or undesired signal of elimination, signal is divided into two-way: the one tunnel delivers to audio amplifier (17) after operational amplifier (16) amplifies; One the tunnel sends into the simulating signal input channel 1 of data collecting card (23) after integrated programmable amplifier (18) amplifies.

5, multifunction bearing vibration measurement device as claimed in claim 4 is characterized in that: the enlargement factor of described integrated programmable amplifier (18) is controlled by computer program.

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