CN101271035A - Non-rotation movement mechanical failure diagnosis system and method - Google Patents

Abstract

The invention relates to a non-rotating mechanical failure diagnosis system which is characterized in that the invention includes a plurality of vibration and impact sensors (2) installed on a detected non-rotating moving machine (1); the output signal ports of all the vibration and impact sensors (21), (22)...(2N) are respectively connected with the input port of a terminal box (3); the output port of the terminal box (3) can be connected with the input port of a pre-processing circuit (4) capable of conducting horizontal vibration low pass filtration and separation, vertical vibration low pass filtration and separation as well as vertical impact resonance demodulation separation to each vibration and impact sensor signal by a bus cable; the output port of the pre-processing circuit (4) is connected with the input interface of a computer (5) which samples the data by an AD converter and can conduct data processing and analysis diagnosis by built-in programs.

Description

A kind of non-rotation movement mechanical failure diagnosis system and method

Technical field

The present invention relates to a kind of non-rotation movement mechanical failure diagnosis system and method, be mainly used at the volley and realize that by detecting generalized resonance the fatigue of nonrotational machinery, crackle, fracture, collision etc. seriously jeopardize safe fault diagnosis.

Background technology

Fault detect for nonrotational machinery, the method that method solves or dynamic strain detects that prior art mainly adopts envelope test to detect solves, and these methods have write every profession and trade becomes regulation about the rules of the design of associated machines, manufacturing, check or standard file.For example railroad industry is for huge non-rotation movement mechanicals such as the compartment of the locomotive of train, vehicle, bogies, just stipulated the several method of envelope test with " TB/T 2360-93 ", as: dropping shock method (making wheel slowly climb up the skewback peak falls suddenly then); Vibrator advocate approach (loading spectrum that obtains according to investigation with the huge vibrator of power carries out the exciting of car load to train); Hammering method (railway worker knocks parts with hand hammer and listens to the variation of sound and define non-fault) or the like.One of shortcoming of these methods and technology is to test detection when stopping, and breaks down if be in operation, and just can not find; Two of shortcoming is to need the testing equipment of huge heaviness and special test place; Three of shortcoming is to carry out above-mentioned experiment test to need in advance machinery to be carried out the energisation mode that detection of dynamic investigation acquisition so-called " loading spectrum " comes the standard test to apply; Four of shortcoming is that hammering method relies on people's the sense of hearing to analyze, and has artificial factor.

Summary of the invention

Task of the present invention is: according to the metaphysics of the dialectics of nature, by the reason of research non-rotation movement mechanical fault pilosity.

At first, the basis of having found things is an internal cause, the reason of having confirmed mechanical easy damage be because of itself exist easily by external impact encourage take place powerful vibration and and then the weak link of fatigue breakdown, i.e. Ji Xie generalized resonance; In the modern mechanical design, the deviser investigates the running environment of machinery, always avoid the whole or local natural frequency of machinery identical or approaching by every possible means, thereby avoid taking place classical physics described " resonance " with the frequency of the mechanical periodic vibration that may be subjected to; Do not make the generalized resonance that the time spent takes place but almost take whole or local natural frequency resonance mechanism that machinery certainly existed into account being subjected to impacting external force, more do not take necessary, as changing rigidity to change natural frequency or to increase damping with measures such as decay generalized resonances.

Then, the present invention is in order to discern the damage that takes place because of above-mentioned generalized resonance, by detecting size, energy accumulation and the variation that machinery is in operation and is subjected to the random external generalized resonance that produces excited by impact, make the safety assessment at a specified future date of machinery, compound sensor 2 is installed on machinery 1 is detected mechanical random vibration, the signal of plurality of compound sensor is handled through terminal box 3, be sent to pre-process circuit 4, be sent to computing machine 5 again through pre-service and gather vibration data, with frequency and the amplitude that software analysis is added up its existing generalized resonance, see accompanying drawing 1.

And then, for the generalized resonance that takes place down excited by impact that externally meets with at random by analysis machinery, its frequency drift particularly, discern the fatigue of machinery, crackle, rhegma and send fault pre-alarming, reach as the railway worker by the hammering audition under the Parking condition or machinery is carried out the same purpose of high-power exciter test, need utilize the external impact that meets with at random under the operation conditions (as the impact of wheel by gap, the snakelike wheel rim that causes during vehicle ' and the spacing impact of track inboard etc.) realize encouraging, by detection system the vibration signal of machinery is carried out long-term on-line monitoring analysis under the operation conditions simultaneously, discern various spontaneous generalized resonances, accumulation data is also discerned the drift of generalized resonance frequency by trend analysis.

For by discerning two synchronous character of vibration that are installed on the signal of generalized resonance in the same way of sensor mechanically at a distance, physical construction fracture under the identification normal condition between two sensor installation sites of this machinery of impossible asynchronous vibration, and make purpose in view of the above and being intended to of designing carries out " long-pending relatively " function that the synchronism identification of above-mentioned vibration signal calculates and carry out computing and have correct signal conditioning, the signal in the same way of relevant two sensors must synchronous detection, and the various vibration informations in the same way of relevant sensor must be gathered simultaneously by computing machine is parallel for this reason and in the detection system of the accompanying drawing 1 of design.

In order further to send early warning that parts are in bad working environments to prevent that machinery from quickening to damage by collision between the mechanical part of vibrational excitation and friction, must contain the resonance and demodulation circuit that the impact information of related sensor is separated, handled in the detection system of accompanying drawing 1 by resonance demodulation technique identification.

The present invention realizes in the mode that is constructed as follows detection system:

A kind of non-rotation movement mechanical failure diagnosis method, it is essential to it is characterized in that containing this technology of enforcement

1) non-rotation movement mechanical fault detection system;

2) scout technology based on generalized resonance with meeting the excitation fault

3) based on the analytical technology of amassing the long-range rhegma of identification of function relatively.

Obtain the vibratory impulse information data by the non-rotation movement mechanical fault detection system, by based on generalized resonance scout near the technical Analysis single-sensor fault with meeting the excitation fault, by the fracture defect of analyzing the mechanical component between certain two far apart sensor based on the analytical technology of the long-range rhegma of identification of long-pending relatively function.

Described a kind of non-rotation movement mechanical failure diagnosis method, it is characterized in that its non-rotation movement mechanical fault detection system contains some vibration impact transducers 2 of installing on detected non-rotation movement mechanical 1, concrete as 21,22 ... 2N, respectively this signal of sensor is received terminal box 3, after terminal box 3 processing, be sent at a distance and can carry out the separation of horizontal vibration low-pass filtering by bus cable each vibration sensor signal, the pre-process circuit 4 of separation of vertical vibration low-pass filtering and vertical impact resonance and demodulation separating treatment, pre-process circuit 4 is again the horizontal vibration through separating treatment, vertical vibration, the AD transducer that vertical impact resonance and demodulation signal parallel is sent to computing machine 5 carries out data sampling, carries out data processing and analyzing and diagnosing by computing machine 5 usefulness softwares again.

Described a kind of non-rotation movement mechanical failure diagnosis method is characterized in that containing based on the scouting technology with meeting the excitation fault of generalized resonance

1) generalized resonance float frequently tired and Identification of Cracks technology,

2) generalized resonance bump mill impact recognition technology, generalized resonance impact (frequency deviation) tired with the Identification of Cracks technology,

3) based on the large-scale component fracture remote identification technology of vibrating long-pending relatively function.

Described a kind of non-rotation movement mechanical failure diagnosis method is characterized in that containing based on the analytical technology of amassing the long-range rhegma of identification of function relatively

1) long-pending relatively serial function and

2) based on the large-scale component fracture remote identification technology of vibrating long-pending relatively function.

Description of drawings

Fig. 1 is a non-rotation movement mechanical fault detection system structural representation;

Fig. 2 is the pre-process circuit synoptic diagram;

Fig. 3 is a related function waveform synoptic diagram;

Fig. 4 is for amplifying type terminal box circuit diagram;

Fig. 5 is a block form voltage current transducer type terminal box circuit diagram;

Fig. 6 is a selecting type terminal box circuit diagram;

Fig. 7 is a kind of current-to-voltage converting circuit synoptic diagram;

Fig. 8 is a kind of low-pass filter circuit synoptic diagram;

Fig. 9 is a kind of resonance and demodulation pre-process circuit synoptic diagram;

Figure 10 is a second order mechanical system synoptic diagram;

Figure 11 is horizontal generalized resonance distributive law synoptic diagram;

Figure 12 is the analogue system and the corresponding waveform and the spectrogram of the generalized resonance of physical shock initiation;

Figure 13 is illegal generalized resonance waveform and the spectrogram of impacting;

Figure 14 is engine truck stop, spring and torque arm mutual relationship synoptic diagram;

Figure 15 is long-pending relatively function waveform synoptic diagram.

Embodiment

As shown in Figure 1, a kind of non-rotation movement mechanical failure diagnosis system, it is included in detected non-rotation movement mechanical (1) and goes up some vibration impact transducers (2) of installing, each vibration impact transducer (21), (22) ... output signal end (2N) links to each other with the input end of terminal box (3) respectively, the output terminal of this terminal box (3) by bus cable with can carry out the horizontal vibration low-pass filtering to each vibration impact transducer signal and separate, the vertical vibration low-pass filtering is separated and the input end of the pre-process circuit (4) of vertical impact resonance and demodulation separating treatment links to each other, the output terminal of pre-process circuit (4) with carry out data sampling by the AD transducer and also can link to each other by the input interface that the interior program of establishing is carried out the computing machine (5) of data processing and analyzing and diagnosing.Pre-process circuit (4) comprise a plurality of pretreatment unit circuit (41), (42) ... (4N), each group sensor signal is to there being a pretreatment unit circuit; Each pretreatment unit circuit contains the current-to-voltage converting circuit that directly horizontal signal I/US is carried out the horizontal voltage signal US of current/voltage conversion output, horizontal voltage signal US is carried out the low-pass filter of output USV N after the low-pass filtering, also contain the current-to-voltage convertor that directly vertical signal I/UC is carried out current/voltage conversion output vertical voltage signal UC, vertical voltage signal UC is carried out the low-pass filter of output UCV N after the low-pass filtering, also contain the resonance and demodulation circuit that vertical voltage signal UC is carried out output UCI N after the resonance and demodulation conversion; The output signal U SVN of each pretreatment unit circuit, UCVN, the parallel AD interface that is transported to computing machine (5) of UCIN.

In the pre-process circuit 4 as accompanying drawing 2, corresponding by terminal box 3 is handled and transmission comes each group sensor signal such as horizontal signal I/US, vertical signal I/UC all have a pretreatment unit circuit as 41,42 ... 4N, each pretreatment unit circuit, as 41, have two input signals at least, one is horizontal signal I/US, another vertical signal I/UC, only contain the horizontal vibration signal among the horizontal signal I/US, and contain vertical vibration signal and vertical impact signal among the vertical signal I/UC; Pretreatment unit circuit 41 contains the current-to-voltage converting circuit 411 that directly horizontal signal I/US is carried out the horizontal voltage signal US of current/voltage conversion output, horizontal voltage signal US is carried out the low-pass filter 412 of output USV1 after the low-pass filtering, also contain the current-to-voltage convertor 413 that directly vertical signal I/UC is carried out current/voltage conversion output vertical voltage signal UC, vertical voltage signal UC is carried out the low-pass filter 414 of output UCV1 after the low-pass filtering, also contain the resonance and demodulation circuit 415 that vertical voltage signal UC is carried out output UCI1 after the resonance and demodulation conversion; The output signal U SVN of each pretreatment unit circuit, UCVN, the parallel AD interface that is transported to computing machine 5 of UCIN detect for computing machine.

As Fig. 4, be a kind of amplifier terminal box, each sensor signal is followed or power amplification is transferred to same the respective signal alignment pre-process circuit transmission in the multicore bus cable again.Each signalling channel 31,32 ... 3N, 3N for example, the signal anode of sensor 2N, receive the end of resistor R 3N-1, receive the positive input terminal of amplifier OP3N-1 again, the other end of sensor 2N signal is received the other end of resistor R 3N-1, while ground connection GND, the negative input end of amplifier OP3N-1 connects the device output terminal, its output terminal output signal arrives one of the output signal line of bus cable BAS I/UC, the power positive end of amplifier OP3N-1 meets the positive supply VDD of bus B AS, the ground wire GND of power-termination bus B AS.

As Fig. 5, it is block form voltage current transducer terminal box, each signalling channel 31,32,3N, 3N for example, contain amplifier OP3N-1, OP3N-2, resistor R 3N-1 ~ R3N-6, diode D3N-1, the signal anode of sensor 2N, receive the end of resistor R 3N-1, also receive the positive input terminal of amplifier OP3N-1 simultaneously, the other end of sensor 2N signal is received the other end of resistor R 3N-1, while ground connection GND, the end of the output terminal termination resistor R3N-3 of amplifier OP3N-1, the end of termination resistor R3N-2 also, the positive input terminal of another termination amplifier OP3N-2 of R3N-2, correct input end through resistor R 3N-5 ground connection GND, the other end of resistor R 3N-3 is received diode D3N-1 anode, the negative terminal output current signal of diode arrives one of the signal cable of bus B AS I/UC, the other end of resistor R 3N-3 also connects the negative input end of amplifier OP3N-2 through resistor R N3-4, this negative input end also connects the output terminal of amplifier through resistor R 3N-5, the output terminal of this amplifier is received the negative input end of amplifier OP3N-1; The power positive end of amplifier OP3N-1, OP3N-2 meets positive supply VDD, power supply negative terminal ground wire GND.

As Fig. 6, be in order to economize on resources and each sensor voltage signal to be carried out certain processing, as voltage amplification or voltage/current conversion to improve transmission range, frequency response and antijamming capability, receive the selecting type terminal box of same the respective signal alignment pre-process circuit transmission in the multicore bus cable again, contain analog multichannel switch 3C1,3C2, voltage amplification or voltage current transformating circuit 3C3,3C4, control and telecommunication circuit 3C5, from sensor 21,22,23, the signal anode of 2N inserts two multiway analog switch 3C1 respectively, the analog input end I1 of 3C2, I2, I3 ... IN, the output terminal of analog switch 3C1 is received the input end IN-V of voltage amplification or voltage current transformating circuit 3C3, the output terminal of analog switch 3C2 is received the input end IN-V of voltage amplification or voltage current transformating circuit 3C4, the output current end OUT-I of voltage amplification or voltage current transformating circuit 3C3 receives the signal wire UA of bus B AS, the output current end OUT-I of voltage amplification or voltage current transformating circuit 3C4 receives the signal wire UB of bus B AS, the 485 order wire 485-A of control and telecommunication circuit 3C5,485-B receives the order wire 485-A of bus respectively, 485-B, the control mouth P10 of control and telecommunication circuit 3C5, P11, P1N, the P1M correspondence is received the address control mouthful A of analog switch 3C1, B, N and sheet selected control system mouth INC, the control mouth P20 of control and telecommunication circuit 3C5, P21, P2N, the P2M correspondence is received the address control mouthful A of analog switch 3C2, B, N and sheet selected control system mouth INC, each element circuit 3C1,3C2,3C3,3C4, the power end VDD of 3C5 and ground terminal GND receive the VDD and the GND of bus respectively.Principal computer sends instruction by 485 communications to the control and the telecommunication circuit 3C5 of terminal box 3, control circuit by address control mouthful and sheet selected control system mouth to multiway analog switch 3C1, the 3C2 sending controling instruction, difference gating sensor 21,22, some signals among the 2N, through 3C3,3C4 makes voltage current transformation, signal wire I/US through bus B AS, I/UC is sent to pre-process circuit 4, so that the synchronous conversion of pre-process circuit, selected two signals of principal computer synchronous acquisition carry out required as the large-scale component fracture remote identification based on the long-pending relatively function of vibration.

Pre-process circuit as Fig. 2, each Signal Pretreatment passage 41 that it is contained, 42,43,4N, for example 41, contain identical horizontal current voltage conversion circuit 411, vertical current voltage conversion circuit 413, horizontal current voltage conversion circuit 411 shown in Figure 7, level input signal I/US from terminal box, can be current input signal ISI, also can be voltage input signal USI, circuit contains current input signal input end ISI, voltage input signal input end USI, diode D411-1, D411-2, resistor R 411-1, R411-2, R411-3, amplifier OP411, output terminal US, power end VDD, VEE, VSS, GND, current input signal from terminal box meets current input signal input end ISI, ISI connect the anode of diode D411-1 and D411-2 negative terminal, connect the negative input end of amplifier OP411, the end of resistor R 411-1, termination resistor R411-2, the end of R411-3, another termination voltage input signal input end USI of R411-1, another termination benchmark negative supply VEE of R411-2, the output terminal of another termination amplifier of R411-3, the positive supply termination positive supply VDD of amplifier, the negative supply termination negative supply VSS of amplifier, the positive input terminal ground connection GND of amplifier, the ground county ground connection GND of input signal also receives the negative terminal of diode V411-1 and the anode of V411-2.For example, the normal zero electric current of current input signal is 8.3333mA, so internal reference voltage VEE=-2.5V; The normal zero of voltage input signal is 5V, and by R411-1=600 ohm, the zero current of generation also equals 5/0.6=8.3333mA; So that when making no signal (having only zero point) input, the output services point of amplifier OP411 is 0V.

As Fig. 8, it is each Signal Pretreatment passage 41 of a kind of pre-process circuit, 42,43,4N, for example in 41, the identical low-pass filter 412 that contains, 414, for example low-pass filter 412, contain capacitor C412-1 ~ C412-4, resistor R 412-1 ~ R412-8, amplifier OP412-1, OP412-2 forms, output voltage U S from current-to-voltage convertor 411 meets input end US, receive the end of capacitor C412-4 again, the other end of C412-4 is received the end of resistor R 412-6, also receive the end of resistor R 412-1, the other end of R412-1 is received the end of capacitor C412-1, also receive the end of resistor R 412-2, the other end of R412-2 is received the end of capacitor C412-2, also receive the end of resistor R 412-3, the other end of R412-3 is received the end of capacitor C413, also receive the positive input terminal of amplifier OP412-1, the other end ground connection GND of R412-6, the other end ground connection GND of C412-1, the other end ground connection GND of C412-3, the output terminal of another termination amplifier OP412-1 of C412-2, the negative input end termination resistor R412-4 of OP412-1, termination resistor R412-5 also, the output terminal of another termination amplifier OP412-1 of R412-5, the other end ground connection GND of resistor R 412-4, the positive input terminal of the output termination OP412-2 of amplifier OP412-1, the negative input end termination resistor R412-7 of OP412-2, the end of termination resistor R412-8 also, the output terminal of another termination amplifier OP412-2 of R412-8, the other end ground connection GND of resistor R 412-7, two amplifier OP412-1, the positive supply termination positive supply VDD of OP412-2, negative supply termination negative supply VSS, by the output of the output terminal of amplifier OP412-2 through stopping direct current, low-pass filtering output to the AD transducer of computing machine through terminal USV1 with amplifying signal USV1.

As Fig. 9, it is each Signal Pretreatment passage 41 of a kind of pre-process circuit, 42,43, among the 4N, for example in 41, contain resonance and demodulation transducer 415, it is characterized in that containing amplifier OP415-1 ~ OP415-5, resistor R 415-1 ~ R415-15, capacitor C415-1 ~ C415-6, diode D415-1, D415-2, output terminal (vertical vibration) output voltage U C from current-to-voltage convertor 413 receives input end UC, receive the end of resistor R 415-1 again, the other end of R415-1 is received capacitor C415-1, the end of C415-2 and the end of resistor R 415-2, the end of the other end termination resistor R415-3 of C415-1 and the output terminal of amplifier OP415-1, the other end of another termination capacitor C415-2 of resistor R 415-3 and the negative input end of amplifier OP415-1, the other end ground connection GND of the positive input terminal of amplifier OP415-1 and resistor R 415-2, the end of the output terminal termination resistor R415-4 of amplifier OP415-1, the negative input end of another termination amplifier OP415-2 of R415-4 and the end of resistor R 415-5.The output terminal of another termination amplifier OP415-2 of R415-5, the output terminal of OP415-2 is also received the non-earth terminal of resistor OP415-2 by resistor R 415-6, the negative input end ground connection GND of OP415-2; The end of the output termination capacitor C415-3 of OP415-2, the end of the other end termination resistor R415-7 of C415-3 and the positive input terminal of amplifier OP415-3, the other end ground connection GND of R415-7, the end of the termination resistor R415-10 of amplifier OP415-3 and the anode of diode D415-2, the negative terminal of D415-2 connects the output terminal of OP415-3, the negative input end of another termination OP415-4 of R415-10 and the end of resistor R 415-9, the output terminal of another termination OP415-4 of R415-9, the output terminal of OP415-3 also connects the positive input terminal of diode D415-1, the negative terminal of D415-1 connects the positive input terminal of OP415-4 and the end of resistor R 415-8, the other end ground connection of R415-8; The output terminal of amplifier OP415-4 is received the end of resistor R 415-11, the other end of R415-11 is received the end of capacitor C415-4, also receive the end of resistor R 415-12, the other end of R415-12 is received the end of capacitor C415-5, also receive the end of resistor R 415-13, the other end of R415-13 is received the end of capacitor C415-6, also receive the positive input terminal of amplifier OP415-5, the other end ground connection GND of C415-4, the other end ground connection GND of C412-6, the output terminal of another termination amplifier OP415-5 of C415-5, the negative input end termination resistor R415-14 of OP415-5, termination resistor R415-15 also, the output terminal of another termination amplifier OP415-5 of R415-15, the other end ground connection GND of resistor R 415-14; The positive supply termination power vd D of amplifier OP415-1 ~ OP415-5, the negative supply termination power supply VSS of amplifier OP415-1 ~ OP415-5; The output terminal output resonance and demodulation figure signal VCI1 of amplifier OP415-5 is to the AD converter of computing machine.Wherein OP415-1, OP415-2 and adjacent devices constitute resonator, and all the other devices constitute detuner, and wherein OP415-3, OP415-4 and adjacent devices constitute wave detector, and OP415-5 and adjacent devices constitute level and smooth low-pass filter.

A kind of non-rotation movement mechanical failure diagnosis method, by realizing mechanical local fatigue, the Identification of Cracks of institute's detection, its generalized resonance float frequently tired and Identification of Cracks technology to from each pretreatment unit 41,42 of pre-process circuit 4 ... horizontal vibration output signal U SV1 ~ USVN of .4N and vertical vibration output signal U CV1 ~ UCVN, realize gathering by the AD conversion one by one, the data sample that to obtain a length be the sample period, carry out fft analysis, obtain each measuring point sample corresponding sample rumble spectrum; Respectively a large amount of sample rumble spectrum under the various different operating modes in certain long examination time period of each measuring point is carried out statistical average and obtain the respectively current generalized resonance distributive law spectrum of this measuring point, then by comparing to historical generalized resonance distributive law spectrum or compare to the current generalized resonance distributive law spectrum of same mechanically a plurality of adjacent similar measuring points, identification respectively this measuring point generalized resonance frequency drift and realize fatigue and Identification of Cracks.

Near vibration monitoring point physical construction always can be decomposed into several mechanical second-order systems, and the motion of the bigger second-order system that may make up also appears in the motion that minimum second-order system had also always both appearred in the natural law.Wherein each second-order system can be described its generalized resonance frequency by Figure 10 and following equation:

${\mathrm{<figure-callout\; id="0"\; label="f"\; filenames="A20071003459600241.png,A20071003459600261.png"\; state="\{\{state\}\}">f</figure-callout>}}_0=\frac{1}{2\mathrm{\&pi;}}\sqrt{\frac{K}{M}}(1-{\mathrm{\&eta;}}^2)---\left(1\right)$

It comprises the mass M of mechanical component, the stiffness K of machinery and the internal damping η of system.

Since ratio of damping η normally one much smaller than 1 trace, so generally be approximately in the engineering:

${\mathrm{<figure-callout\; id="0"\; label="f"\; filenames="A20071003459600241.png,A20071003459600261.png"\; state="\{\{state\}\}">f</figure-callout>}}_0=\frac{1}{2\mathrm{\&pi;}}\sqrt{\frac{K}{M}}---\left(2\right)$

In formula (1), (2) without any the factor of extraneous factor.This just shows fully that the inherent feature of the internal cause decision of machinery is independent of man's will.No matter how external condition acts on it, its this natural frequency does not change.

If the machinery generation crackle nearby that is detected, the mechanical stiffness K that participates in above-mentioned formula reduces significantly, formula (1), (2) expressed frequency is reduced significantly or drift down; If the mechanical structures fracture makes a part of quality not participate in resonance, promptly mass M descends, and formula (1), (2) expressed frequency is risen significantly or upward drift.

If other corresponding consecutive point do not have big resonance spectrum amplitude on certain frequency, and powerful spectrum amplitude has appearred in this measuring point, then explanation damping unit mechanically lost efficacy.The object lesson of Figure 11 is the lost efficacy strong generalized resonance of the 12Hz cause of the torque arm (rubber cushion assembly) of 5 of certain locomotive trailing bogies.

The factor that excites machinery that generalized resonance takes place is the impact that machinery is subjected to, as as shown in figure 12, an impact causes several resonator system generation generalized resonances of machinery, sensor is to their global vibration waveform, pass through fft analysis, obtain the generalized resonance frequency spectrum, therefrom found the generalized resonance frequency of each resonator.

A kind of non-rotation movement mechanical failure diagnosis method, for the mill that illegally bumps of realizing support system is discerned, it is characterized in that generalized resonance bump mill impact recognition technology for from each pretreatment unit 41,42 of pre-process circuit 4 ... output signal U CI1 ~ UCIN after the resonance and demodulation conversion of .4N, realize gathering by the AD conversion one by one, the data sample that to obtain a length be the sample period, carry out fft analysis, obtain each measuring point sample corresponding sample and impact frequency spectrum; The spectral line greater than maximal value 40 ~ 70% of spectral line amplitude is wherein kept, all the other remove, the abstract characteristic frequency that obtains this frequency spectrum, generalized resonance in certain period to each measuring point under the various different operating modes bumps mill and impacts characteristic frequency and ask occurrence rate (=occur number of times/total statistics number of this frequency), impact occurrence rate greater than 50 ~ 70% if certain measuring point characteristic frequency generalized resonance bumps mill, determine that then mill has appearred illegally bumping in the support system of this measuring point.

Figure 13 is based on waveform, the sample frequency spectrum of the sample period that said method obtains and the frequency spectrum occurrence rate that obtains according to great amount of samples frequency spectrum statistics, thus found No. 5 measuring point (5 right measuring points of trailing bogie) illegally bump mill.From some measuring points that experiment detects, the occurrence rate that has only this measuring point the about 43Hz of frequency to occur uniquely be 82.68% illegally bump mill.By searching, discovery is that the mill that bumps that axle box stop and the stop hole of bogie of this measuring point correspondence comes in contact (design point is not for contacting) and along with the vertical stretching vibration of the 21.5Hz of journal box spring each vibration friction 2 times take place impacts.Every group of time interval of impacting is about 4*1650/2048/3=1.074s, and (sample length is 4s), the speed of a motor vehicle is 81km/h, be 81000/3600=22.5m/s, so every group of running distance that impacts between the beginning is 24.17m, approach the distance between the gap of 25m.Thereby confirm: the reason that causes these impacts is the impact that wheel passes through gap, excites journal box spring that the generalized resonance of 21.5Hz takes place, so cause that 43Hz takes place stop bump mill (vibration is bumped mill up and down once at every turn).

A kind of non-rotation movement mechanical failure diagnosis method, bump mill according to generalized resonance and impact recognition technology, for realizing the fatigue identification of illegally bumping the mill parts of support system, it is characterized in that generalized resonance impacts that (frequency deviation) is tired bumps mill to the generalized resonance of current certain measuring point with the Identification of Cracks technology and impact characteristic frequency generalized resonance historical with it and bump mill impact characteristic frequency and compare, if both relative variations, confirm then that the generation generalized resonance impacts the parts that bump mill and fatigue occurred greater than 8 ~ 12%.

For last example, if find that generalized resonance bumps the very high mill frequency of bumping of mill impact occurrence rate and drifts about, for example to low drift, then explanation directly causes the sort of generalized resonance vibration frequency variation of bumping mill, this just means that the rigidity that constitutes this generalized resonance descends, normally spring generation crackle.Because the phenomenon of fracture has appearred also following in stop fracture rear spring in certain unit.The mutual relationship of stop, spring and torque arm such as Figure 14.

The long-pending relatively Functional Analysis software engineering of discerning long-range rhegma contains the long-pending relatively series of functions D (t) of the long-range rhegma of identification, quantize long-pending relatively function LD (t), introduce the quantization function LA (t), the LB (t) that quantize to differentiate territory door g, quantize long-pending just relatively function LDZ (t), quantize negative to the long-pending just relatively function T LDZ of long-pending function LDF (t), statistic quantification, statistic quantification negative to long-pending function T LDF, ask above-mentioned function to be defined as follows to two vibration signal f1 (t), the f2 (t) of synchronous acquisition:

Long-pending relatively function D (t) is defined as follows:

$D\left(t\right)=\mathrm{li}{m}_{c\&RightArrow;0}\frac{f_1\left(t\right)f_2\left(t\right)}{|f_1\left(t\right)f_2\left(t\right)+c|}$

Quantizing long-pending relatively function LD (t) is defined as follows:

$\mathrm{LD}\left(t\right)={\lim }_{c\&RightArrow;0}\frac{f_1\left(t\right)f_2\left(t\right)}{|f_1\left(t\right)f_2\left(t\right)+c|}=\left\{\begin{array}{c}1,f_1\left(t\right)f_2\left(t\right)>0\\ 0,f_1\left(t\right)f_2\left(t\right)=0\\ -1,f_1\left(t\right)f_2\left(t\right)<0\end{array}\right.$

Introduce and quantize to differentiate that the long-pending relatively function definition of quantification of territory door g is as follows:

Quantizing long-pending just relatively function LDZ (t) is defined as follows:

$\mathrm{LDZ}\left(t\right)=\mathrm{SMT}\left(\mathrm{LDZ}\right)=\mathrm{SMT}|\frac{\mathrm{LA}\left(t\right)}{2}+\frac{\mathrm{LB}\left(t\right)}{2}|=\left\{\begin{array}{c}1,\mathrm{LDZ}=1\\ 0,\mathrm{LDZ}<1\end{array}\right.$

Quantizing negative is defined as follows long-pending function LDF (t):

$\mathrm{LDF}\left(t\right)=\mathrm{SMT}\left(\mathrm{LDF}\right)=\mathrm{SMT}|\frac{\mathrm{LA}\left(t\right)}{2}-\frac{\mathrm{LB}\left(t\right)}{2}|=\left\{\begin{array}{c}1,\mathrm{LDF}=1\\ 0,\mathrm{LDF}<1\end{array}\right.$

The long-pending just relatively function T LDZ of statistic quantification is defined as follows:

$\mathrm{TLDZ}=\frac{1}{T}{\&Integral;}_0^T\mathrm{LDZ}\left(t\right)\mathrm{dt}$

The statistic quantification negative is defined as follows long-pending function T LDF:

$\mathrm{TLDF}=\frac{1}{T}{\&Integral;}_0^T\mathrm{LDF}\left(t\right)\mathrm{dt}$

In the formula, f ₁(t), f ₂(t) examined or check two long-pending relatively original function.

For two signal f1 (t), f2 (t), classical theory is mainly investigated them and whether is had identical but not necessarily synchronous periodic signal, is typically related function:

$R_{f1f2}\left(\mathrm{\&tau;}\right)={\&Integral;}_{-\&infin;}^{\&infin;}{f}_2(\mathrm{\&tau;}+t)f_1\left(t\right)\mathrm{d\&tau;}$

As shown in Figure 3, the 1st of every width of cloth figure the row f ₁(t) function and the 2nd row f ₂(t) the related function R of function _F1f2(t) be plotted in the 3rd row.It shows that related function only extracts f1, function that the f2 medium frequency is identical.

As shown in Figure 15, the 1st of every width of cloth figure the row f ₁(t) function and the 2nd row f ₂(t) the long-pending relatively function f of function ₃(t) be plotted in the 3rd row.It shows amasss the similarity that function is only paid close attention to f1, f2 function relatively, is expressed as 1 for identical part, and opposite part is expressed position-1.Long-pending relatively function is only investigated among two signal f1 (t), the f2 (t), whether identical, synchronous signal is arranged, comprising periodic signal and random signal.For example the long-pending just relatively function T LDZ of the statistic quantification of the low frequency part of the left and right horizontal of locomotive bogie vibration＞90% and statistic quantification negative show then that to long-pending function T LDF＜10% vibrations are not ruptured synchronously about this bogie.

Large-scale component based on the long-pending relatively function of vibration ruptures the remote identification technology to each pretreatment unit 41 from pre-process circuit 4,42, ... among horizontal vibration output signal U SV1 ~ USVN of .4N and the vertical vibration output signal U CV1 ~ UCVN, certain two and above signal are gathered simultaneously, and to per two vibration signal f1 (t) that gather simultaneously, the generalized resonance signal that contains separately among the f2 (t) is asked long-pending relatively function, by statistics of discerning this long-pending relatively function negative to long-pending greater than threshold value 0.707, and judge that there is fatigue break in the physical construction between the measuring point of these two vibration signal correspondences.

Claims (18)

1. non-rotation movement mechanical failure diagnosis system, it is characterized in that it is included in detected non-rotation movement mechanical (1) and goes up some vibration impact transducers (2) of installing, each vibration impact transducer (21), (22) ... output signal end (2N) links to each other with the input end of terminal box (3) respectively, the output terminal of this terminal box (3) by bus cable with can carry out the horizontal vibration low-pass filtering to each vibration impact transducer signal and separate, the vertical vibration low-pass filtering is separated and the input end of the pre-process circuit (4) of vertical impact resonance and demodulation separating treatment links to each other, the output terminal of pre-process circuit (4) with carry out data sampling by the AD transducer and also can link to each other by the input interface that the interior program of establishing is carried out the computing machine (5) of data processing and analyzing and diagnosing.

2. a kind of non-rotation movement mechanical failure diagnosis system as claimed in claim 1, it is characterized in that described pre-process circuit (4) comprise a plurality of pretreatment unit circuit (41), (42) ... (4N), each group sensor signal of input pretreatment unit is to there being a pretreatment unit circuit; Each pretreatment unit circuit contains the current-to-voltage converting circuit that directly horizontal signal I/US is carried out the horizontal voltage signal US of current/voltage conversion output, horizontal voltage signal US is carried out the low-pass filter of output USV N after the low-pass filtering, also contain the current-to-voltage convertor that directly vertical signal I/UC is carried out current/voltage conversion output vertical voltage signal UC, vertical voltage signal UC is carried out the low-pass filter of output UCV N after the low-pass filtering, also contain the resonance and demodulation circuit that vertical voltage signal UC is carried out output UCI N after the resonance and demodulation conversion; The output signal U SVN of each pretreatment unit circuit, UCVN, the parallel AD interface that is transported to computing machine (5) of UCIN.

3. a kind of non-rotation movement mechanical failure diagnosis system as claimed in claim 1 is characterized in that described terminal box (3) is transferred to the no circuit connection box of same respective signal alignment pre-process circuit (4) transmission in the multicore bus cable to each signal of sensor by it.

4. a kind of non-rotation movement mechanical failure diagnosis system as claimed in claim 1 is characterized in that described terminal box (3) is followed each sensor signal or power amplification is transferred to the amplifier terminal box that same the respective signal alignment pre-process circuit (4) in the multicore bus cable transmits again.

5. a kind of non-rotation movement mechanical failure diagnosis system as claimed in claim 1, after it is characterized in that described terminal box (3) comprises the processing of voltage/current conversion to each sensor voltage signal, receive the voltage current transformation terminal box of same respective signal alignment pre-process circuit (4) transmission in the multicore bus cable again.

6. a kind of non-rotation movement mechanical failure diagnosis system as claimed in claim 1 is characterized in that described terminal box (3) inside has the signal switching terminal box of signal selecting circuit.

7. as a kind of non-rotation movement mechanical failure diagnosis system of claim 1 or 4, it is characterized in that described terminal box (3) comprises a plurality of signalling channels (31) corresponding with each sensor signal, (32), (3N), in each signalling channel, comprise an amplifier, the positive input terminal of this amplifier links to each other with the signal anode of sensor and an end of a resistor, the negative input end of amplifier links to each other with the signal negative terminal of sensor and the other end of a resistor, meet bus ground GND simultaneously, one of the output signal line of its output terminal and bus cable BAS I/UC links to each other, the power positive end of amplifier meets the positive supply VDD of bus B AS, the ground wire GND of power-termination bus B AS.

8. as a kind of non-rotation movement mechanical failure diagnosis system of claim 1 or 4, it is characterized in that described terminal box (3) comprises a plurality of signalling channels (31) corresponding with each sensor signal, (32), (3N), each signalling channel contains amplifier OP3N-1, OP3N-2, resistor R 3N-1 ~ R3N-6, diode D3N-1, the signal of sensor 2N is just terminating to the end of resistor R 3N-1, also receive the positive input terminal of amplifier OP3N-1 simultaneously, the other end of sensor 2N signal is received the other end of resistor R 3N-1, while ground connection GND, the end of the output terminal termination resistor R3N-3 of amplifier OP3N-1, the end of termination resistor R3N-2 also, the positive input terminal of another termination amplifier OP3N-2 of R3N-2, correct input end through resistor R 3N-5 ground connection GND, the other end of resistor R 3N-3 is received diode D3N-1 anode, the negative terminal output current signal of diode arrives one of the signal cable of bus B AS I/UC, the other end of resistor R 3N-3 also connects the negative input end of amplifier OP3N-2 through resistor R N3-4, this negative input end also connects the output terminal of amplifier through resistor R 3N-5, the output terminal of this amplifier is received the negative input end of amplifier OP3N-1; The power positive end of amplifier OP3N-1, OP3N-2 meets positive supply VDD, power supply negative terminal ground wire GND.

9. as a kind of non-rotation movement mechanical failure diagnosis system of claim 1 or 5, it is characterized in that described terminal box (3) contains analog multichannel switch 3C1,3C2, voltage amplification or voltage current transformating circuit 3C3,3C4, control and telecommunication circuit 3C5, from vibration impact transducer sensor (21), (22), (23), signal anode (2N) inserts two multiway analog switch 3C1 respectively, the analog input end I1 of 3C2, I2, I3 ... IN, the output terminal of analog switch 3C1 is received the input end IN-V of voltage amplification or voltage current transformating circuit 3C3, the output terminal of analog switch 3C2 is received the input end IN-V of voltage amplification or voltage current transformating circuit 3C4, the output current end OUT-I of voltage current transformating circuit 3C3 receives the signal wire UA of bus B AS, the output current end OUT-I of voltage amplification or voltage current transformating circuit 3C4 receives the signal wire UB of bus B AS, the 485 order wire 485-A of control and telecommunication circuit 3C5,485-B receives the order wire 485-A of bus respectively, 485-B, the control mouth P10 of control and telecommunication circuit 3C5, P11, P1N, the P1M correspondence is received the address control mouthful A of analog switch 3C1, B, N and sheet selected control system mouth INC, the control mouth P20 of control and telecommunication circuit 3C5, P21, P2N, the P2M correspondence is received the address control mouthful A of analog switch 3C2, B, N and sheet selected control system mouth INC, each element circuit 3C1,3C2,3C3,3C4, the power end VDD of 3C5 and ground terminal GND receive the VDD and the GND of bus respectively.Principal computer sends instruction by 485 communications to the control and the telecommunication circuit 3C5 of terminal box (3), control circuit by address control mouthful and sheet selected control system mouth to multiway analog switch 3C1, the 3C2 sending controling instruction, difference gating sensor (21), (22), some signals (2N), through 3C3,3C4 makes voltage current transformation, signal wire I/US through bus B AS, I/UC is sent to pre-process circuit (4), so that the synchronous conversion of pre-process circuit, selected two signals of principal computer synchronous acquisition carry out required as the large-scale component fracture remote identification based on the long-pending relatively function of vibration.

10. as a kind of non-rotation movement mechanical failure diagnosis system of claim 1 or 2, the a plurality of Signal Pretreatment element circuits (41) that it is characterized in that described pre-process circuit (4), (42), (43), (4N) contain identical horizontal current voltage conversion circuit (411), vertical current voltage conversion circuit (413), its of horizontal current voltage conversion circuit (411) is from the level input signal I/US of terminal box, can be current input signal ISI, also can be voltage input signal USI, circuit contains current input signal input end ISI, voltage input signal input end USI, diode D411-1, D411-2, resistor R 411-1, R411-2, R411-3, amplifier OP411, output terminal US, power end VDD, VEE, VSS, GND, current input signal from terminal box meets current input signal input end ISI, ISI connect the anode of diode D411-1 and D411-2 negative terminal, connect the negative input end of amplifier OP411, the end of resistor R 411-1, termination resistor R411-2, the end of R411-3, another termination voltage input signal input end USI of R411-1, another termination benchmark negative supply VEE of R411-2, the output terminal of another termination amplifier of R411-3, the positive supply termination positive supply VDD of amplifier, the negative supply termination negative supply VSS of amplifier, the positive input terminal ground connection GND of amplifier, the ground county ground connection GND of input signal also receives the negative terminal of diode V411-1 and the anode of V411-2.

11. a kind of non-rotation movement mechanical failure diagnosis system as claim 1 or 2, each the Signal Pretreatment element circuit (41) that it is characterized in that described pre-process circuit (4), (42), (43), (4N) contain identical low-pass filter (412), (414), low-pass filter (412), contain capacitor C412-1 ~ C412-4, resistor R 412-1 ~ R412-8, amplifier OP412-1, OP412-2 forms, output voltage U S from current-to-voltage convertor (411) meets input end US, receive the end of capacitor C412-4 again, the other end of C412-4 is received the end of resistor R 412-6, also receive the end of resistor R 412-1, the other end of R412-1 is received the end of capacitor C412-1, also receive the end of resistor R 412-2, the other end of R412-2 is received the end of capacitor C412-2, also receive the end of resistor R 412-3, the other end of R412-3 is received the end of capacitor C413, also receive the positive input terminal of amplifier OP412-1, the other end ground connection GND of R412-6, the other end ground connection GND of C412-1, the other end ground connection GND of C412-3, the output terminal of another termination amplifier OP412-1 of C412-2, the negative input end termination resistor R412-4 of OP412-1, termination resistor R412-5 also, the output terminal of another termination amplifier OP412-1 of R412-5, the other end ground connection GND of resistor R 412-4, the positive input terminal of the output termination OP412-2 of amplifier OP412-1, the negative input end termination resistor R412-7 of OP412-2, the end of termination resistor R412-8 also, the output terminal of another termination amplifier OP412-2 of R412-8, the other end ground connection GND of resistor R 412-7, two amplifier OP412-1, the positive supply termination positive supply VDD of OP412-2, negative supply termination negative supply VSS, by the output of the output terminal of amplifier OP412-2 through stopping direct current, low-pass filtering output to the AD transducer of computing machine through terminal USV1 with amplifying signal USV1.

12. a kind of non-rotation movement mechanical failure diagnosis system as claim 1 or 2, each the Signal Pretreatment element circuit (41) that it is characterized in that described pre-process circuit (4), (42), (43), contain resonance and demodulation transducer (415) (4N), it is characterized in that containing amplifier OP415-1 ~ OP415-5, resistor R 415-1 ~ R415-15, capacitor C415-1 ~ C415-6, diode D415-1, D415-2, output terminal (vertical vibration) output voltage U C from current-to-voltage convertor (413) receives input end UC, receive the end of resistor R 415-1 again, the other end of R415-1 is received capacitor C415-1, the end of C415-2 and the end of resistor R 415-2, the end of the other end termination resistor R415-3 of C415-1 and the output terminal of amplifier OP415-1, the other end of another termination capacitor C415-2 of resistor R 415-3 and the negative input end of amplifier OP415-1, the other end ground connection GND of the positive input terminal of amplifier OP415-1 and resistor R 415-2, the end of the output terminal termination resistor R415-4 of amplifier OP415-1, the negative input end of another termination amplifier OP415-2 of R415-4 and the end of resistor R 415-5.The output terminal of another termination amplifier OP415-2 of R415-5, the output terminal of OP415-2 is also received the non-earth terminal of resistor OP415-2 by resistor R 415-6, the negative input end ground connection GND of OP415-2; The end of the output termination capacitor C415-3 of OP415-2, the end of the other end termination resistor R415-7 of C415-3 and the positive input terminal of amplifier OP415-3, the other end ground connection GND of R415-7, the end of the termination resistor R415-10 of amplifier OP415-3 and the anode of diode D415-2, the negative terminal of D415-2 connects the output terminal of OP415-3, the negative input end of another termination OP415-4 of R415-10 and the end of resistor R 415-9, the output terminal of another termination OP415-4 of R415-9, the output terminal of OP415-3 also connects the positive input terminal of diode D415-1, the negative terminal of D415-1 connects the positive input terminal of OP415-4 and the end of resistor R 415-8, the other end ground connection of R415-8; The output terminal of amplifier OP415-4 is received the end of resistor R 415-11, the other end of R415-11 is received the end of capacitor C415-4, also receive the end of resistor R 415-12, the other end of R415-12 is received the end of capacitor C415-5, also receive the end of resistor R 415-13, the other end of R415-13 is received the end of capacitor C415-6, also receive the positive input terminal of amplifier OP415-5, the other end ground connection GND of C415-4, the other end ground connection GND of C412-6, the output terminal of another termination amplifier OP415-5 of C415-5, the negative input end termination resistor R415-14 of OP415-5, termination resistor R415-15 also, the output terminal of another termination amplifier OP415-5 of R415-15, the other end ground connection GND of resistor R 415-14; The positive supply termination power vd D of amplifier OP415-1 ~ OP415-5, the negative supply termination power supply VSS of amplifier OP415-1 ~ OP415-5; The output terminal output resonance and demodulation figure signal VCI1 of amplifier OP415-5 is to the AD converter of computing machine.

13. one kind is used in and has the some vibration impact transducers that are installed on the detected non-rotation movement mechanical and the method for carrying out non-rotation movement mechanical failure diagnosis of terminal box, pre-process circuit and computing machine, it is characterized in that it comprise based on generalized resonance with meet excitation fault scoutings technology with based on the relative analytical technology of amassing the long-range rhegma of identification of function.

14. as the non-rotation movement mechanical failure diagnosis method of claim 13, it is characterized in that described based on generalized resonance with meet excitation fault scouting technology comprise the generalized resonance that can implement in no particular order float frequently tired and Identification of Cracks, generalized resonance bump mill impact identification, generalized resonance impact (frequency deviation) tired with three steps of Identification of Cracks.

15. non-rotation movement mechanical failure diagnosis method as claim 14, it is characterized in that described generalized resonance floats tired and Identification of Cracks step frequently to horizontal vibration output signal U SV1 ~ USVN and vertical vibration output signal U CV1 ~ UCVN from each pretreatment unit of pre-process circuit, realize gathering by the AD conversion one by one, the data sample that to obtain a length be the sample period, carry out fft analysis, obtain each measuring point sample corresponding sample rumble spectrum; Respectively a large amount of sample rumble spectrum under the various different operating modes in certain long examination time period of each measuring point is carried out statistical average and obtain the respectively current generalized resonance distributive law spectrum of this measuring point, then by comparing to historical generalized resonance distributive law spectrum or compare to the current generalized resonance distributive law spectrum of same mechanically a plurality of adjacent similar measuring points, identification respectively this measuring point generalized resonance frequency drift and realize fatigue and Identification of Cracks.

16. non-rotation movement mechanical failure diagnosis method as claim 14, it is characterized in that described generalized resonance bump mill impact identification step from the resonance and demodulation conversion of each pretreatment unit of pre-process circuit after output signal U CI1 ~ UCIN, realize gathering by the AD conversion one by one, the data sample that to obtain a length be the sample period, carry out fft analysis, obtain each measuring point sample corresponding sample and impact frequency spectrum; The spectral line greater than maximal value 40 ~ 70% of spectral line amplitude is wherein kept, all the other remove, the abstract characteristic frequency that obtains this frequency spectrum, generalized resonance in certain period to each measuring point under the various different operating modes bumps mill impact characteristic frequency and asks occurrence rate, occurrence rate is the number of times/total statistics number that this frequency occurs, impact occurrence rate greater than 50 ~ 70% if certain measuring point characteristic frequency generalized resonance bumps mill, determine that then mill has appearred illegally bumping in the support system of this measuring point.

17. non-rotation movement mechanical failure diagnosis method as claim 14, it is characterized in that described generalized resonance impacts that (frequency deviation) is tired bumps mill to the generalized resonance of current certain measuring point with the Identification of Cracks step and impact characteristic frequency generalized resonance historical with it and bump mill impact characteristic frequency and compare, if both relative variations, confirm then that the generation generalized resonance impacts the parts that bump mill and fatigue occurred greater than 8 ~ 12%.

18., it is characterized in that the analytical technology of the described long-range rhegma of identification based on long-pending relatively function may further comprise the steps as the non-rotation movement mechanical failure diagnosis method of claim 13:

The first step, ask long-pending relatively serial function, long-pending relatively series of functions D (t), quantize long-pending relatively function LD (t), introduce the quantization function LA (t), the LB (t) that quantize to differentiate territory door g, quantize long-pending just relatively function LDZ (t), quantize negative to the long-pending just relatively function T LDZ of long-pending function LDF (t), statistic quantification, statistic quantification negative to long-pending function T LDF, ask above-mentioned function to be defined as follows to two vibration signal f1 (t), the f2 (t) of synchronous acquisition:

Long-pending relatively function D (t) is defined as follows:

$D\left(t\right)={\lim }_{c\&RightArrow;0}\frac{f_1\left(t\right)f_2\left(t\right)}{|f_1\left(t\right)f_2\left(t\right)+c|}$

Quantizing long-pending relatively function LD (t) is defined as follows:

$\mathrm{LD}\left(t\right)={\lim }_{c\&RightArrow;0}\frac{f_1\left(t\right)f_2\left(t\right)}{|f_1\left(t\right)f_2\left(t\right)+c|}=\left\{\begin{array}{c}1,f_1\left(t\right)f_2\left(t\right)>0\\ 0,f_1\left(t\right)f_2\left(t\right)=0\\ -1,f_1\left(t\right)f_2\left(t\right)<0\end{array}\right.$

Introduce and quantize to differentiate that the quantization function of territory door g is defined as follows:

Quantizing long-pending just relatively function LDZ (t) is defined as follows:

$\mathrm{LDZ}\left(t\right)=\mathrm{SMT}\left(\mathrm{LDZ}\right)=\mathrm{SMT}|\frac{\mathrm{LA}\left(t\right)}{2}+\frac{\mathrm{LB}\left(t\right)}{2}|=\left\{\begin{array}{c}1,\mathrm{LDZ}=1\\ 0,\mathrm{LDZ}<1\end{array}\right.$

Quantizing negative is defined as follows long-pending function LDF (t):

$\mathrm{LDF}\left(t\right)=\mathrm{SMT}\left(\mathrm{LDF}\right)=\mathrm{SMT}|\frac{\mathrm{LA}\left(t\right)}{2}-\frac{\mathrm{LB}\left(t\right)}{2}|=\left\{\begin{array}{c}1,\mathrm{LDF}=1\\ 0,\mathrm{LDF}<1\end{array}\right.$

The long-pending just relatively function T LDZ of statistic quantification is defined as follows:

$\mathrm{TLDZ}=\frac{1}{T}{\&Integral;}_0^T\mathrm{LDZ}\left(t\right)\mathrm{dt}$

The statistic quantification negative is defined as follows long-pending function T LDF:

$\mathrm{TLDF}=\frac{1}{T}{\&Integral;}_0^T\mathrm{LDF}\left(t\right)\mathrm{dt}$

In the formula, f ₁(t), f ₂(t) examined or check two long-pending relatively original function;

Second step, large-scale component fracture remote identification based on the long-pending relatively function of vibration, it is among the horizontal vibration output signal U SV1 ~ USVN and vertical vibration output signal U CV1 ~ UCVN from each pretreatment unit of pre-process circuit, certain two and above signal are gathered simultaneously, and to per two vibration signal f1 (t) that gather simultaneously, the generalized resonance signal that contains separately among the f2 (t) is asked long-pending relatively function, by statistics of discerning this long-pending relatively function negative to long-pending greater than threshold value 0.707, and judge that there is fatigue break in the physical construction between the measuring point of these two vibration signal correspondences.

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