CN1180163A - Method of machine vibration analysis for tire uniformity machine - Google Patents
Method of machine vibration analysis for tire uniformity machine Download PDFInfo
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- CN1180163A CN1180163A CN 97102944 CN97102944A CN1180163A CN 1180163 A CN1180163 A CN 1180163A CN 97102944 CN97102944 CN 97102944 CN 97102944 A CN97102944 A CN 97102944A CN 1180163 A CN1180163 A CN 1180163A
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Abstract
A method for analyzing the vibration of a tire uniformity machine having a number of rotating components uses the signals from load cells when the machine idle to output voltage signals that are then amplified and input into a computer as unfiltered, amplified voltage signals. The signals are converted into a power spectrum and selected groups of frequencies and their amplitude are compared with acceptable amplitudes for the frequencies generated by various rotating parts of the machine. When at least one of the amplitudes for different frequencies is greater than at least one of the acceptable amplitudes for the frequencies generating different rotating parts of the machine, the computer outputs an alarm signal.
Description
The present invention relates to the machine state fields of measurement, more particularly relate to a kind of utilization and be installed in the method that the signal that force cell produced on the load wheel is measured the vibration of tyre evenness equipment.
In airtyred manufacturing process, flow into the rubber or the band bundle of wheel loose tool, small difference on diameter such as crimping, lining, crown, rubberised ply etc. all will cause the unevenness of finished tire sometimes.Unevenness reaches certain degree will be on the surface that contacts with this tire, and as causing the variation of power on the road surface, this road surface will produce the interference on vibration and the sound wave to the automobile that described tire is installed.The cause that changes regardless of generation power, when this variation surpasses the maximal value of allowing, will be to the generation adverse influence of travelling of the automobile that uses this tire.
Adverse influence by the unevenness of the tire that above-mentioned unevenness produced in the time of will causing tire to rotate, is applied to the fluctuation of the power of the various ways on the road surface simultaneously on the road surface.For example, the unevenness of tire preferably is described as it " out-of-roundness " of tire, this unevenness will cause be applied to tire directly upwards or perpendicular to turning axle and with the variation of the tire radial force of road surface " non-tangent line " direction.In addition, being applied to tire axial or being parallel to the axial transverse force of rotation to increase owing to tapering is excessive, and this transverse force defines with half of the clean mean value of the caused transverse force of non-conica tyre, and it will cause tire stretching constantly in one direction.
For uneven tire, during it rotates, radially will change on the tire with horizontal power.This during tyre rotation radially with the variation of transverse force, normally since the rigidity of the center line of tire circumference or tyre surface and/or the difference of geometric configuration cause.If these difference are very little, then when described tire is installed on the automobile, this is inessential with the variation of horizontal direction power radially, and its influence can be ignored and do not remember.Yet, when this difference surpasses a certain magnitude, thisly radially will be enough to cause that with the variation of transverse force automobile exercises uneven steady and/or restive situation.In addition, as previously mentioned, tapering is crossed senior general makes the tire that rotates to stretching on one side.
Therefore, the someone developed the method that overcorrect power becomes in the past, and this method is to use such as the rubber of grinding tool with tire shoulder and/or tyre surface central area to remove.Most this modification method has comprised such step, is about to tread labels and becomes a series of circumference increments, and obtain the force measurement result that a series of expressions are applied by tire along with these increments contact with the road surface.Then these data are deciphered and revised rubber on the table top according to the pattern that the result produced of decoding.These modification methods carry out on the tyre evenness machinery and equipment usually, and this machine comprises the system that is used for making the test tyre rotation that abuts in the load wheel surface that freely rotates.In this test unit, the rotating manner of load wheel is relevant with the rotating tire applied force, and measures these power by the measurement mechanism that is placed on the appropriate location.The result who produces when the tire tested is less than can accept as a result the time, and tire shoulder and intermediate flange sharpener detect on the uneven exact position at measuring equipment, and a spot of rubber on the tire tread is ground off.Along with the rotation of tire, measurement and grinding are carried out simultaneously.The tyre evenness equipment (TUM) of advanced technology, the model of producing as Akron Standard Co.ofAkron Ohio be the power measurement result of equipment of D70LTW by computing machine decoding, and the sharpener of the control that uses a computer removes the rubber on the tire tread.At United States Patent (USP) the 3rd, 739, No. 533, the 3rd, 946, No. 527, the example of the equipment that utilizes these methods is disclosed in the 4th, 914, No. 869 and the 5th, 263, No. 284.
Any vibration that grinding attachment produced by tyre evenness equipment becomes the measuring sensor detection by its power.A spot of vibration allows, because electronic filter can be eliminated this irrelevant noise.Damaged or installed not at that time but work as motor bearing wearing and tearing or Grinding wheel, will produce excessive vibration.This vibration is detected by described power measuring sensor, and this will make tyre evenness equipment Grinding wheel tyre surface on the position of mistake, and test bay is long when causing grinding, and the tire of processing is very few, and the tire chip of grinding is too much.In addition, need to detect by two kinds of differentiated slightly vibration sources on frequency and phase place, as the caused beat frequency of a plurality of grinding motors.
At present, the method for the detection excessive vibration that has earlier is to use the external vibration analyser that has removable accelerometer, and the technician is manually installed in this instrument on the difference of tyre evenness equipment.The problem of this technology is the equipment cost height, needs several hours just can finish vibration analysis, and comprehensive stop time of the expense of tyre evenness equipment is big.Simultaneously, because the fault of this equipment is difficult for discovering usually, so before serious damage occurring, problem can not in time be found.
As mentioned above, and the patent of enumerating previously is illustrated, does for the effort of revising the tire unevenness, and is continuing the work of this respect so that it is more effective.Yet in prior art, neither one proposes to calculate the additional vibratory amount in the tyre evenness equipment before tire is installed.
The invention provides a kind of vibration analysis method for tyre evenness equipment with a plurality of rotating elements.When machine dallies, the vibration of force cell monitoring tyre evenness equipment.The force cell that is installed on the load wheel produces output voltage signal, and this signal is exaggerated, then by being converted into unfiltered amplification voltage signal and being gathered by computing machine from the analog quantity to the digital quantity.Utilizing common quick Fournier transform that these conversion of signals are become frequency field represents.Computing machine calculates the power spectrum of representing each class frequency and its amplitude to the rotating part of each tyre evenness equipment.But the acceptance latitude of selected then group of frequencies and their amplitude and selected group of frequencies relatively.But when having a acceptance latitude greater than this frequency in the amplitude of different frequency at least, computing machine sends alerting signal.In addition, power spectrum can also detect two interactions between the vibration source, and this interaction produces the beat frequency that has low frequency values usually
There is method and apparatus that advantage resemble the present invention can not be provided earlier, promptly, under the situation of the quantity that does not increase functional part, reduce running cost, material that utilization is easy to obtain and common element, a kind of new, useful by method step and components and parts, the combination that is difficult for discovering and obtaining than the more advantage of prior art equipment obtains the purpose that the present invention will reach.
The method that the purpose of this invention is to provide additional vibratory amount in a kind of measuring wheel tyre uniformity equipment.Another purpose is to get rid of existing problem of prior art method and restriction.From following explanation and claims, other purpose of the present invention will be seen significantly.
According to the narration of doing below in conjunction with accompanying drawing, the structure of the embodiment that the present invention is cited, operation and advantage will be more apparent, here:
Fig. 1 is the graphic extension according to the signal of the top view of the tyre evenness equipment that tire is installed of the present invention;
Fig. 2 is the graphic extension of signal of side view of the load wheel of tyre evenness equipment, the load wheel is installed between two force cells as shown in Figure 1, and force cell is delivered to the output signal of its generation in the electric signal regulator that is connected with computing machine;
Fig. 3 is the process flow diagram of description references operation of the present invention;
Fig. 4 is with the power spectrum that signal produced of the horizontal force cell in the graphical method explanation tyre evenness equipment, and grinding subassembly does not rotate in the figure;
Fig. 5 is with the power spectrum that signal produced of the horizontal force cell in the graphical method explanation tyre evenness equipment, and grinding subassembly rotates in the figure;
Fig. 6 is with the power spectrum that signal produced of the radially force cell in the graphical method explanation tyre evenness equipment, and grinding subassembly does not rotate in the figure;
Fig. 7 is the power spectrum that signal produced of the radially force cell in the tyre evenness equipment with the graphical method explanation, and grinding subassembly rotates in the figure;
Referring to Fig. 1 and Fig. 2, their illustrations a kind of according to the tyre evenness equipment (TUM) 10 that tire 12 is installed of the present invention.Tire 12 is typical pneumatic tyres, and the tyre surface of the annular of this tire has top and bottom wheel shoulder zone and the central area between top and wheel shoulder zone, bottom.Tire 12 is installed on the rim 14, and this rim is fixed on the tire main shaft 16, and this inflation of tire is arrived required pressure.Variable speed driver 17, as shown in phantom in FIG., rotating tire main shaft 16 and rim 14.Apply load by load wheel 18 to tire 12, this load wheel is around main shaft 20 rotations of passing its center.During the unevenness of testing tire, load wheels 18 is pressed on the pneumatic tyre comes the simulated roadway situation to apply a specific power (for example, 600 to 1900 pounds).Load wheels 18, main shaft 20 is radially with horizontal force cell 36,38 assemblies are installed on the bearing seat and (do not draw among the figure), and the device of available routine, making its motion as the electro-motor that connects operation by circulating ball type, travelling load wheel 18 makes it engage with tire 12 and does not engage.In fact shoulder sharpener assembly 24 has comprised identical shoulder top and shoulder bottom sharpener (only describing 24) here, and this sharpener comprises the Grinding wheel that is promoted by motor, and this takes turns the shoulder regions that can shift to and be close to tire 12 independently.As shown in the figure, shoulder top sharpener 24 comprises the Grinding wheel 26a that is driven by motor 28a, and available any conventional equipment makes this sharpener engage with the shoulder of tire 12 and do not engage as hydraulic servo (not drawing among the figure).Center sharpener assembly 30 is positioned near wheel 12, and for wheel 12, the distance of leaving load wheels 18 is about 90 ° clockwise.Center grinding subassembly 30 has a Grinding wheel 32 that is driven by motor 34, and available any conventional equipment makes this Grinding wheel 32 engage with the central area of the tyre surface of tire 12 and do not engage as hydraulic servo (not drawing among the figure).
As shown in Figure 2, conventional radially is installed on the main shaft 20 with horizontal force cell 36,38, and load wheels 18 is suspended in the middle of them.Usually, radially and laterally force cell 36,38 be used for respectively measuring from nestle up that tire 12 that load wheels 18 rotates sends radially and transverse force.All comprise horizontal dynamometry inductive means on each force cell 36,38, these parts are used for measuring the transverse force of extending along the direction parallel with the load wheels rotation axis, applied by the tire 12 near load wheels 18. Force cell 36,38 also comprises radially dynamometry inductive means simultaneously, is used for measuring the joining place at load wheels 18 and tire 12, by tire 12 near load wheels 18, and the radial force that the main shaft 20 that rotates about it by described load wheels is applied.
The amplification of radial top and radially bottom amplifier 46,50 output signal be connected to signal wire 58 by circuit 54 and 56 respectively.Radial top and radially the bottom amplifier 46,50 combination amplified output signal via line 58 is input to frequency overlapped-resistable filter 60, this wave filter removes high frequency output, promptly remove from force cell 36,38 the high-frequency signal above 45 hertz is not so that the radio-frequency component in the force cell signal that amplifies can cause aliasing in analog quantity in the conversion of digital quantity.Also comprise low-pass filter 62 in the electric signal regulator 40, this wave filter links to each other with frequency overlapped-resistable filter 60 by circuit 64.This low-pass filter 62 is with radial top and radially be higher than 16 hertz signal attenuation in the mixed output signal of bottom amplifier 46,50, and signal band is limited on the frequency that tire and load wheels produced.The output signal of low-pass filter 62 is directly sent into computing machine 45 by circuit 66.
Laterally top and transverse bottom amplifier 48 and 52 are exported the voltage signal that is exaggerated, these signals directly pass through circuit 68 and 70, and in circuit 72, mix, be input to frequency overlapped-resistable filter 74 then to remove the radio-frequency component in the output signal, promptly remove from force cell 36,38 the high-frequency signal above 45 hertz is not so that the radio-frequency component in the force cell signal that is exaggerated can cause aliasing in analog quantity in the conversion of digital quantity.Also comprise low-pass filter 76 in the electric signal regulator 40, this wave filter links to each other with frequency overlapped-resistable filter 74 by circuit 78.Be higher than 16 hertz signal attenuation in the mixed output signal of low-pass filter 76 with horizontal top and transverse bottom amplifier 48,52, signal band is limited on the frequency that tire and load wheels produced.The output signal of low-pass filter 76 is directly sent into computing machine 45 by circuit 80.
The present invention analyzes the vibration of tyre evenness equipment 10, with existing of definite equipment rotating part fault, and overcomes the problem that causes the mistake measurement of tire transition grinding.In detail, the objective of the invention is to use the vibration of force cell 36 and 38 measuring wheel tyre uniformity equipment 10 at the machine idle period.Then it being inflated to required pressure in that a tire is unloaded and another tire is installed on the rim 14 from tire axle 16, is the typical idle period of tyre evenness equipment 10 during this period of time.Be used for the force cell 36 of vibration of measuring wheel tyre uniformity equipment 10 and 38 outputs voltage signal to vibration that should equipment.Equally also relevant from force cell 36 with the vibration of load wheels 18 with the voltage signal of 38 outputs.The vibration of load wheels 18 mainly is that the vibration by machine 10 is caused, and the vibration of machine 1O is by rotatable parts such as load wheels main shaft 20, the tire axle 16 of motor driven, and grinding tire assembly 24 and center grinding subassembly 34 cause.Deliver to the electric signal regulator 40 by circuit 42 and 44 respectively from the voltage signal of force cell 36 and 38 outputs.In detail, be input to radially bottom amplifier 50 and transverse bottom amplifier 52 from the voltage signal of force cell 36 outputs by circuit 42, the voltage signal of exporting from force cell 38 directly is input to radial top amplifier 46 and horizontal top amplifier 48 by circuit 44.The voltage signal that is amplified by horizontal top amplifier 48 and transverse bottom amplifier 52 is respectively through the circuit 68 of interconnection and 70 and deliver in the computing machine 45 by circuit 82.From radial top amplifier 46 and radially the voltage signal that amplifies of bottom amplifier 50 through the circuit 54 of interconnection and 56 and deliver in the computing machine 45 by circuit 84.Radially and laterally force cell 36 and 38 voltage signal are input in the computing machine 45 with the form of simulating signal, this signal corresponding to monitored in the schedule time radially and transverse force.
The shown process flow diagram of Fig. 3 is a program of analyzing the tyre evenness vibration equipment.Starter cup tyre uniformity equipment 10 at first.Then, at the equipment idle period, promptly when tire is not installed on the rim 14, rotate one or more rotatable parts.Next, radially and laterally force cell 36 and 38 monitors radially with horizontal stressed.Electric signal regulator 40 amplifies radially and the horizontal analog voltage signal that produced of force cell then.Then, the simulating signal that is exaggerated is input to computing machine 45.Simultaneously, the selected group of frequencies amplitude of allowing corresponding to the threshold frequency of different rotatable parts also is input in the computing machine 45.Computing machine 45 carries out the analog digital conversion of simulating signal to digital signal then.The conventional FFT program of this digital signal utilization is converted into frequency field and represents.Computing machine represents to calculate the power spectrum of the amplitude of different frequency according to this frequency field then.Then, the amplitude of this different frequency is compared with the selected group of frequencies amplitude of allowing corresponding to different rotatable parts threshold frequencies.If the amplitude of different frequency is greater than the amplitude of allowing of selected group of frequencies, computing machine is output alarm signal then.Otherwise data relatively will be saved so that analysis in the future.
The example of the typical vibrating mass of tyre evenness equipment 10 is the syncmotors 17 by conventional connection device (not drawing among the figure) rotating tire main shaft 16.Motor 17 generally changes (rpm) work with per minute 1800.For the threshold frequency of determining that this motor is produced, with rotations per minute divided by 60.Then the result of threshold frequency changes or 30 hertz p.s. 30 (rpm).Therefore, if it is shown to resemble power spectrum, the amplitude of the threshold frequency that 30 hertz Frequency and Amplitude is produced greater than motor 17 and the connection device by drive shaft 16 set up by working specification, show then in tyre evenness equipment 10, to have certain vibration that this vibration is because the fault of the connection device of motor 17 or connection motor and main shaft 16 causes.With reference to figure 4 and Fig. 5, be approximately 1.5 pounds corresponding to the amplitude of 30 hertz signals of the threshold frequency of motor 17.Suppose motor 17 have about threshold frequency less than 2 pounds operation amplitude, according to normal working specification, the power spectrum of force cell 36 and 38 radial components shows that motor operations is normal, and computing machine does not have alerting signal output.Power spectrum data is stored in the computing machine, or off line is prepared against analysis when needing in the future.
Example according to another vibration analysis method of the present invention is relevant with the motor that drives shoulder grinding subassembly 24 and center grinding subassembly 34.For example, grinding motor 28a drives Grinding wheel 26a by belt pulley 27a.Grinding motor 28a is an asynchronous induction motor with 3600rpm work.It is 60 hertz with 60rpm work or its threshold frequency that this rotating speed is obtained grinding subassembly divided by 60.Therefore, the method of discussing with the front is identical, if in the power spectrum amplitude of 60 hertz frequency compositions greater than with the amplitude of grinding motor 28a by the corresponding predetermined critical frequency of the vibration that its standardized operation produced, then operating personnel are with defendant's grinding motor 28a existing problems.As shown in Figure 4, when grinding subassembly was not worked, by the operation of computing machine 45, force cell 36 and 38 radial component produced output voltage signal, and these signals constitute and have less than 2 pounds of amplitudes, about 60 hertz frequency signal group.After grinding subassembly 24 startups and Grinding wheel rotated, as shown in Figure 5, the about 60 hertz frequency signal group of another one had about 11.5 pounds amplitude.Suppose should be approximately 8 pounds in the amplitude of the threshold frequency about 60 hertz under the initial operations specification, the power spectrum among Fig. 5 is illustrated in and has vibration about 60 hertz, and its Oscillation Amplitude is approximately 3.5 pounds, is higher than the amplitude of the threshold frequency of allowing.Notice that as shown in Figure 6 when grinding subassembly was not worked, by the operation of computing machine 45, force cell 36 and 38 lateral part output voltage signal, these signals constituted and have less than 2 pounds of amplitudes about 60 hertz frequency signal group.And after grinding subassembly 24 startups and Grinding wheel rotation, as shown in Figure 7, about 60 hertz frequency signal group has about 7 pounds amplitude.The part of force cell 36 and 38 is worked as in this explanation, when promptly laterally force cell partly detects excessive vibration, and another part of force cell, promptly radially force cell in the case may not detect excessive vibration.
Excessive vibration may be caused by one in grinding subassembly 24 or 34 institute.In order to determine that grinding subassembly excessive vibration and therefore to break down, can only start equipment for grinding 24a at one time, among the 24b or 34 one.Then, generation power spectrum as described above, if the amplitude of group of frequencies is higher than the determined amplitude of working specification near 60 hertz frequencies, then deducibility has specific equipment for grinding whether fault is arranged.
In the another one example, the fault of driving belt 27a or Grinding wheel 26a causes excessive vibration.Grinding wheel 26a generally with the rotational speed of 6800rpm, is approximately 109 hertz corresponding to threshold frequency.If the amplitude of 109 hertz frequencies is higher than corresponding to well following at bearing state on the power spectrum, the predetermined amplitude of the standard of Grinding wheel normal equilibrium is then represented the Grinding wheel imbalance, the bearing fault of Grinding wheel, or external substance has blocked grinding stone.
As shown in Figure 4, when grinding subassembly was not worked, by the operation of computing machine, force cell 36 and 38 lateral part produced output voltage signal, and these signals constitute the power spectrum that has less than about 109 hertz frequency sets of signals of 2 pounds of amplitudes.Then, after grinding subassembly 24 startups and Grinding wheel rotation, as shown in Figure 5, its amplitude of frequency signal group about 109 hertz is approximately 11.5 pounds.Suppose should be approximately 4 to 5 pounds in the amplitude of the threshold frequency about 109 hertz under the initial operations specification, the power spectrum among Fig. 5 is illustrated in and has vibration about 109 hertz, and its Oscillation Amplitude is approximately 6 to 7 pounds, is higher than the amplitude of allowing of this frequency.This vibration may be owing to Grinding wheel 26a, 26b (not drawing among the figure), or an institute in 32 causes.Excessive and cause fault for the specific Grinding wheel vibration of determining grinding subassembly 24 or grinding subassembly 34, can only start equipment for grinding 24a at one time, among the 24b or 34 one.Then, generation power spectrum as described above, if the amplitude of group of frequencies is higher than the amplitude of working specification defined near 109 hertz, then deducibility has specific equipment for grinding whether fault is arranged.
As previously discussed, be to analyze the vibration of tyre evenness equipment 10, force cell is normally in equipment 10 idle period reading of data, promptly unloading next tire from tire main shaft 6 another testing tire just on the main shaft between installation period.During spinning, load wheels 18 is because the still rotation that contacted with rotor wheel 12 last time.Therefore these load wheels 18 rated speeds produce the frequency less than 1 hertz less than 60rpm, and preferably between 0.4 hertz to 0.8 hertz.With above-mentioned identical for example, represented as power spectrum, if be higher than predetermined amplitude, then may on load wheels 18 or installation bearing, there be fault by the amplitude of the frequency that load wheels produced.In the present invention, also utilize fractional motor to come the rotational load wheel, to obtain higher frequency, simultaneously also in order to check unbalancedness.
Though above in conjunction with the tyre evenness device description the present invention,, the vibration that utilizes force cell to measure miscellaneous equipment also belongs to category of the present invention.
Obviously, we provide a kind of method and apparatus according to analytic engine equipment state of the present invention, and these apparatus and method are used a plurality of above rotatable parts of being narrated, and utilize these rotatable parts can reach purpose of the present invention, method, and advantage.According to the present invention, the method of analytic engine vibration equipment, be to use a plurality of rotatable parts, comprise the load wheels of freely rotating that is installed on the load wheels main shaft, the motor of drive shaft, with the motor of a plurality of driven in rotation sharpeners, the Oscillation Amplitude that this method is used for which parts of rotatable parts of definite machinery and equipment is higher than its operations specification, determines that therefore installation is incorrect or parts damages are arranged.The reading of force cell also can be used to detect the existence of beat frequency, for example by two at the caused beat frequency of grinding motor that has minute differences on frequency and the phase place between mutually.Consequently a kind of low frequency is generally 2 hertz or littler, and for detecting this frequency, sampling rate is about per second 10 to 20 times.If the amplitude of low frequency is higher than the predetermined amplitude of motor with its standardized operation, then there is beat frequency.In these cases, computing machine can output alarm signal.
We have narrated the present invention in conjunction with some embodiment, obviously, for the professional and technical personnel, will be appreciated that various substituting of the present invention by means of prior art, revise, and change.Therefore, the present invention attempts all these are substituted, and modifications and variations are included in the scope of following claim.
Claims (9)
1. be used for the method for analytical equipment state, described equipment has a plurality of rotatable parts, comprising: be installed in the load wheels of freely rotating on the load wheels main shaft, the main shaft of motor driven, with the motor of a plurality of driven in rotation sharpeners, described method is characterised in that the following step:
Rotate one or more described rotatable parts;
Utilization be installed in force cell on the described load wheels main shaft monitor by described one or more rotatable parts vibration produced radially and transverse force;
To be input to from the analog voltage signal of described force cell in the computing machine, described analog voltage signal corresponding to preset time monitor in the cycle radially and transverse force;
Described analog signal conversion is become digital signal;
Described digital signal is converted to frequency field to be represented;
The expression of described frequency field is converted to the power spectrum of the amplitude of representing different frequency;
The amplitude of described different frequency is compared with the amplitude of allowing of selected group of frequencies.
2. according to the method for claim 1, its feature also is the following step:
When the amplitude that has a described different frequency at least during greater than the described amplitude of allowing of at least one of selected group of frequencies, described computing machine is with output alarm signal.
3. according to the method for claim 1, its feature also is the following step:
Rotate the drive shaft of described motor driven; And
When described different frequency wherein at least one frequency at least one described amplitude greater than with the corresponding described selected group of frequencies of the vibration class of allowing of the CD-ROM drive motor of described drive shaft at least one amplitude of allowing the time, described computing machine output alarm signal.
4. according to the method for claim 1, its feature also is the following step:
Rotate described one or more in described a plurality of rotary grinding device, described a plurality of rotary grinding utensils have a plurality of special uses, and are connected to one motor in described a plurality of rotary grinding device by a special-purpose drive pulley; And
When at least one the described amplitude of at least one frequency in the described different frequency greater than with at least one amplitude of allowing of being connected in described a plurality of rotary grinding device in one the corresponding described selected group of frequencies of described dedicated motor the time, described computing machine output alarm signal.
5. according to the method for claim 1, its feature also is following steps:
Utilization is installed in the first radially and horizontal force cell and be installed in the second radially and horizontal force cell of described another second end of load wheels main shaft of described load wheels main shaft first end, monitor by described one or more rotatable parts produced radially and transverse force.
6. according to the method for claim 1, its feature also is the following step:
Rotate described load wheels; And
When at least one the described amplitude of at least one frequency in the described different frequency greater than with the corresponding described selected group of frequencies of the frequency of described load wheels at least one amplitude of allowing the time, described computing machine output alarm signal.
7. utilize the method for a plurality of rotatable parts analytical equipment states, it is characterized in that the following step:
Rotate one or more described rotatable parts;
Utilization be installed in force cell on one of described rotatable parts monitor by described one or more rotatable parts vibration produced radially and transverse force;
To be input to from the analog signals of described force cell in the computing machine, described analog voltage signal corresponding to preset time monitor in the cycle radially and transverse force;
To the conversion of digital quantity described analog signals is converted into digital quantity signal by analog quantity;
Described digital quantity signal is converted into frequency field to be represented;
The power spectrum of described frequency field being represented to be converted to the amplitude of representing different frequency;
The amplitude of described different frequency is compared with the amplitude of allowing of selected group of frequencies.
8. according to the method for claim 7, its feature also is following steps: but when the amplitude that has a described different frequency at least during greater than the described acceptance latitude of at least one selected group of frequencies, from the step of described computing machine output alarm signal.
9. according to the method for claim 7, its feature also is the following step:
Rotate two or more described rotatable parts;
Detection is by the beat frequency that interaction produced of two or more described rotatable parts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 97102944 CN1180163A (en) | 1996-03-08 | 1997-03-07 | Method of machine vibration analysis for tire uniformity machine |
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| US612,705 | 1996-03-08 | ||
| CN 97102944 CN1180163A (en) | 1996-03-08 | 1997-03-07 | Method of machine vibration analysis for tire uniformity machine |
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| CN1180163A true CN1180163A (en) | 1998-04-29 |
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| CN 97102944 Pending CN1180163A (en) | 1996-03-08 | 1997-03-07 | Method of machine vibration analysis for tire uniformity machine |
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| CN102353500A (en) * | 2011-06-03 | 2012-02-15 | 上海师范大学 | Extraction method of unbalanced signal for dynamic balance measurement |
| CN1813180B (en) * | 2003-08-25 | 2013-08-07 | 国际计测器株式会社 | Method and apparatus for tire uniformity measurement |
| CN103245516A (en) * | 2012-02-10 | 2013-08-14 | 商用分时公司 | System for characterizing tire uniformity machines and methods of using the characterizations |
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| CN104296925A (en) * | 2013-07-17 | 2015-01-21 | 阿克隆特种机械公司 | System for characterizing tire uniformity machines and methods of using the characterizations |
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| US9329103B2 (en) | 2011-01-28 | 2016-05-03 | GM Global Technology Operations LLC | Methods and systems for characterizing vehicle tires |
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| CN1813180B (en) * | 2003-08-25 | 2013-08-07 | 国际计测器株式会社 | Method and apparatus for tire uniformity measurement |
| US9097595B2 (en) | 2008-11-14 | 2015-08-04 | Stowe Woodward, L.L.C. | System and method for detecting and measuring vibration in an industrial roll |
| US9329103B2 (en) | 2011-01-28 | 2016-05-03 | GM Global Technology Operations LLC | Methods and systems for characterizing vehicle tires |
| CN102353500A (en) * | 2011-06-03 | 2012-02-15 | 上海师范大学 | Extraction method of unbalanced signal for dynamic balance measurement |
| CN103245516A (en) * | 2012-02-10 | 2013-08-14 | 商用分时公司 | System for characterizing tire uniformity machines and methods of using the characterizations |
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| CN103508303A (en) * | 2012-06-27 | 2014-01-15 | 株式会社日立制作所 | Abnormity diagnosis method, abnormity diagnosis device, and passenger conveyer with abnormity diagnosis device |
| CN103508303B (en) * | 2012-06-27 | 2015-08-05 | 株式会社日立制作所 | Abnormality diagnostic method, apparatus for diagnosis of abnormality and there is the apparatus of passenger conveyor of apparatus for diagnosis of abnormality |
| CN103868700A (en) * | 2012-11-15 | 2014-06-18 | 通用汽车环球科技运作有限责任公司 | Method and system for characterizing vehicle tire |
| CN104296925A (en) * | 2013-07-17 | 2015-01-21 | 阿克隆特种机械公司 | System for characterizing tire uniformity machines and methods of using the characterizations |
| CN108918165A (en) * | 2018-07-10 | 2018-11-30 | 安徽悦众车身装备有限公司 | A kind of Automobile steel ring edge uniformity detection device |
| CN111912631A (en) * | 2019-05-08 | 2020-11-10 | 株式会社神户制钢所 | Tire uniformity data correction method and tire uniformity testing machine |
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