CN109974831A - A kind of torsional vibration signals generator of m-Acetyl chlorophosphonazo containing time-varying - Google Patents
A kind of torsional vibration signals generator of m-Acetyl chlorophosphonazo containing time-varying Download PDFInfo
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- CN109974831A CN109974831A CN201910283152.XA CN201910283152A CN109974831A CN 109974831 A CN109974831 A CN 109974831A CN 201910283152 A CN201910283152 A CN 201910283152A CN 109974831 A CN109974831 A CN 109974831A
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- 238000012360 testing method Methods 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/10—Measuring characteristics of vibrations in solids by using direct conduction to the detector of torsional vibrations
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Abstract
The invention discloses a kind of torsional vibration signals generators of m-Acetyl chlorophosphonazo containing time-varying, including master controller, the input terminal of the master controller and the output end of first filter, second filter and modulus module are electrically connected, the input terminal of the modulus module and the output end of third filter are electrically connected, the master controller and SRAM module, FLASH module, network card chip, USB chip and the two-way electric connection of RS232 module, the output end of the master controller and the input terminal of level block, optocoupler and digital module are electrically connected.The present invention is compared with mechanical torsional oscillation testboard, structure is simple, and measurement condition covering comprehensively, can sufficiently examine the precision of Analysis of Torsional Vibration device, it is capable of providing all kinds of linear signal or multiple-frequency signal simultaneously, and Analysis of Torsional Vibration device can be assessed to time-varying m-Acetyl chlorophosphonazo signal processing situation.
Description
Technical field
The present invention relates to signal generator and torsional vibration measurement, calibration technique field, specially a kind of m-Acetyl chlorophosphonazo containing time-varying is turned round
Shake signal generator.
Background technique
Measurement, application, research of the torsional vibration signals in all kinds of rotary axis systems are more and more extensive.Machinery inertial formula torsional oscillation
Instrument can measure the shafting torsional oscillation of lower frequency, but since this measurement is contact type measurement, system structure is complicated, installation fiber crops
Tired, data record difficulty is big, it is difficult to be competent at high revolving speed shafting measurement, primarily now replace for digital electrical signals torsional vibration measurement device
Generation.Digital torsiograph generally uses non-contact sensor to carry out high sampling rate to real-time revolving speed and acquires in real time, when then using
Frequency algorithm process analysis, with easy for installation, the advantages that the torsional vibration measurement of wide speed range can be competent at, can be analyzed in real time.
Non-contact sensor in the system mainly has Hall revolving speed gear sensor, magnetoelectricity gear velocity sensor, photoelectric coding
Device, laser sensor, optoelectronic reflection type sensor, photoelectricity correlation type sensor, these sensors be mainly characterized by shafting with
After condition code disc spins, the pulse signal crossed by real-time rotating-speed modulation is generated by corresponding intrument, measuring instrument passes through to the arteries and veins
Rush the torsional vibration signals that signal is demodulated, analysis is handled.Two analoglikes can be divided into the demodulation method of the pulse signal
Formula processing and digital processing, analog processing complete signal mainly by serial narrow-band filtering circuit and integrating circuit
Demodulation, digital processing are to analyze to obtain torsional oscillation information by algorithm process after filtering, shaping.Processing method is different,
The order of accuarcy for obtaining result has larger difference, and the quick and convenient accuracy for examining torsional oscillation acquisition device just has certain necessity
Property.Torsional vibration signals generator is exactly to measure the accurate of torsional oscillation acquisition device with the torsional vibration signals determined for generating relative standard
Degree.The torsional oscillation calibration system of mechanical bench type can not only calibrate torsional oscillation acquisition device, also can be to sensor signal
It is centainly assessed, but platform system is complicated, involves great expense, Pure numerical form torsional oscillation calibration device does not have platform system, and only simulation is turned round
The signal that sensor comes out in measuring system of shaking, can more easily evaluate the accuracy of signal processing in torsional oscillation acquisition device,
But existing Pure numerical form torsional oscillation calibration device only provides relatively simple linear signal or simple signal, cannot assess Analysis of Torsional Vibration
Device is to time-varying m-Acetyl chlorophosphonazo signal processing situation.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, it the present invention provides a kind of torsional vibration signals generator of m-Acetyl chlorophosphonazo containing time-varying, solves
Existing torsional vibration signals calibration device cannot assess the problem of Analysis of Torsional Vibration device is to time-varying m-Acetyl chlorophosphonazo signal processing situation.
(2) technical solution
To achieve the above object, the invention provides the following technical scheme: a kind of torsional vibration signals generator of m-Acetyl chlorophosphonazo containing time-varying,
Including master controller, the input terminal of the master controller and the output end electricity of first filter, second filter and modulus module
Property connection, the output end of the input terminal of the modulus module and third filter is electrically connected, the master controller and SRAM mould
Block, FLASH module, network card chip, USB chip and the two-way electric connection of RS232 module, the output end and electricity of the master controller
The input terminal of flat-die block, optocoupler and digital module is electrically connected.
Advanced optimize the technical program, the network card chip, USB chip and RS232 module and the two-way electrical property of PC computer
Connection.
The technical program is advanced optimized, the output end of the optocoupler and the input terminal of relay are electrically connected.
The technical program is advanced optimized, the first filter and second filter pass through eQEP bus and eCAP respectively
Bus and master controller are electrically connected.
The technical program is advanced optimized, the master controller passes through ePMW bus and GPIO bus and level block respectively
It is electrically connected with optocoupler.
The technical program is advanced optimized, the master controller is electrical by XINTF bus and network card chip and USB chip
Connection.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of torsional vibration signals generator of m-Acetyl chlorophosphonazo containing time-varying, having following has
Beneficial effect:
This contains time-varying m-Acetyl chlorophosphonazo torsional vibration signals generator, and compared with mechanical torsional oscillation testboard, structure is simple, measurement condition
Covering comprehensively, can sufficiently examine the precision of Analysis of Torsional Vibration device, while being capable of providing all kinds of linear signal or multiple-frequency signal,
And Analysis of Torsional Vibration device can be assessed to time-varying m-Acetyl chlorophosphonazo signal processing situation.
Detailed description of the invention
Fig. 1 is present system schematic illustration.
In figure: 1, master controller；2, SRAM module；3, FLASH module；4, first filter；5, second filter；6,
Three filters；7, modulus module；8, network card chip；9, USB chip；10, RS232 module；11, PC computer；12, level block；
13, optocoupler；14, digital module；15, relay.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1:
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of torsional vibration signals generator of m-Acetyl chlorophosphonazo containing time-varying, including
Master controller 1, model TMS320F28335, the F28335 dominant frequency of master controller 1 are 150MHz, have 12 road PWM and 6 tunnels
CAP can externally provide multiple torsional oscillation rotational speed pulse signals simultaneously, and can capture pulse signal by CAP, carry out self-correcting
Standard, the input terminal of master controller 1 and the output end of first filter 4, second filter 5 and modulus module 6 are electrically connected, modulus
The model AD7606 of module 6, in order to guarantee precision, master controller 1 is electrically connected by XINTF bus and modulus module 6, can
To be used to acquire the analog signal of torsional oscillation, the input terminal of modulus module 7 and the output end of third filter 6 are electrically connected, master control
Device 1 processed and SRAM module 2, FLASH module 3, network card chip 8, USB chip 9 and the two-way electric connection of RS232 module 10, SRAM
Model 39VF800A, the model W5300 of network card chip 8 of model IS61LV51216AL, the FLASH module 3 of module 2,
The model MAX3232 of 9 model FT2232H, RS232 module 10 of USB chip, the output end and level block 12 of master controller 1,
The input terminal of optocoupler 13 and digital module 14 is electrically connected, the model 74LVC245 of level block 12, the model of optocoupler 13
PC computer 817, the model DAC8552 of digital module 14, master controller 1 are electrically connected by spi bus and digital module 14,
For generating analog signal, compared with mechanical torsional oscillation testboard, structure is simple, and measurement condition covering comprehensively, can be examined sufficiently
The precision of Analysis of Torsional Vibration device is tested, while being capable of providing all kinds of linear signal or multiple-frequency signal, and torsional oscillation point can be assessed
Analysis apparatus is to time-varying m-Acetyl chlorophosphonazo signal processing situation.
Specifically, network card chip 8, USB chip 9 and RS232 module 10 and the two-way electric connection of PC computer 11.
Specifically, the input terminal of the output end of optocoupler 13 and relay 15 is electrically connected.
Specifically, first filter 4 and second filter 5 pass through eQEP bus and eCAP bus and master controller 1 respectively
It is electrically connected.
Specifically, master controller 1 is electrically connected by ePMW bus and GPIO bus with level block 12 and optocoupler 13 respectively
It connects
Specifically, master controller 1 is electrically connected by XINTF bus and network card chip 8 and USB chip 9.
The method that shafting torsional oscillation is measured currently based on transient speed is applied than wide, is carried out by gear sensor
The acquisition of shafting transient speed is current typical method, cardinal principle monitored by gear sensor in shafting etc.
The gear code-disc of spacing distribution, when shafting rotates, it is assumed that do not have torsional oscillation, then the instantaneous velocity of axis is equal to its average speed, code-disc
It is also uniform rotation, in this way, the repetition period of one pulse signal of per tooth of sensor output is identical, and works as shafting
When torsional oscillation, then the velocity of wave motion that a torsional oscillation has been superimposed on the basis of its average speed is equivalent to.At this point, the arteries and veins of sensor output
Rush sequence just and be no longer evenly spaced, but the FM signal that a carrier frequency is modulated by torsional vibration signals, the signal wink
When amplitude equation are as follows:
Wherein f (t) is former modulated signal, KPPMFor coefficient of transposing, F0Not adjust pulse recurrence frequency (Hz), A is pulse width
It spends (V), τ0For pulse width (S), ω0For F0Angular frequency (rad/s), first item is DC terms in formula, and Section 2 includes original
The differential information of modulated signal f (t), what last was indicated is with K ω0For phase-modulation (PM) signal of carrier frequency.Phase tune
System (PM) and the frequency spectrum of frequency modulation(PFM) (FM) are removed to differ in phaseOutside, the two bandwidth is the same.
Analog torsional oscillation test is demodulated this signal by low-pass filter and integrator and obtains torsional angle signal.It is digital
Torsiograph leads to multiple-pulse capture circuit (CAP) and is acquired to pulse signal, as follows to the demodulation of the signal: to set axis and rotate a circle
Time be tc, by formulaIt is ω that all mean angular velocities, which can be obtained,c, number of gear teeth N, measure rotation n tooth time
For tn, by formulaThe average speed that the tooth can be obtained is ω, by formulaThe torsional angle that axis can be obtained is
Formula can be obtained after integral calculation in θAs long as therefore measuring tc, tn?.
Torsional vibration signals generator then passes through known torsional angle signal, inverse to solve sensor signal sequence.That is solution formulaIn tnSequence.FormulaIn, if θ (n) is it is known that tcIt can believe from known torsional angle
It is obtained in number, N is the number of gears of realistic simulation namely the length of sequence, also for it is known that therefore solvable equation acquires tn
Embodiment 2:
Torsional oscillation test analytical instrument in part generates 100 teeth using torsional angle triangular wave as torsion analogy signal at present
Gear output pulse signal, preceding half way around is slow, the fast torsional vibration signals of rear half way around, mainly 50 5000Hz and 50 5063.3Hz's
Square-wave pulse.Its week mean speed is 3018r/min, and torsion frequency 50.3Hz, torsional angle peak value is 0.566, triangular waveform
Periodic function Fourier expansion formula are as follows:
1 humorous 0.458 ° of secondary torsional angle, 3 humorous 0.051 ° of secondary torsional angles, 5 humorous 0.018 ° of secondary torsional angles can be calculated to obtain.To the torsional angle of generation
Signal carries out FFT, it is known that 1,3,5 car following-theory amplitudes have certain error, can pass through improvement signal processing method, such as equal times
Interpolation resets, improves amplitude computational accuracy such as windowing process.Practical center shafting running speed multiplicity, can adjust by a certain percentage
The whole pulse period adjusts the frequency of this 100 pulse signals, it can simulate different revolving speeds, measured signal middle gear
Number can also simulate the test case of different gear quantity by adjusting pulse number.But triangular-wave generator can not be complete
All torsional angle waveforms of all standing, cannot sufficiently examine and determine analysis method and instrument.
Embodiment 3:
More often than not, torsional angle signal is not triangular signal, but the relevant sinusoidal signal with excited frequency, right
Such torsional vibration signals are simulated to detect torsional oscillation device to the analysis ability of such signal.
If single-frequency torsional angle signal isWherein A=1；The π of ω=100, then θ (t)=sin (100 π
T), formula θ (t)=sin (100 π t) is substituted into formulaObtain formula:
Wherein tcFor revolving speed average period, can obtainWhat N was represented is gear quantity, takes 100, the n to be here
The gear serial number passed through in real time, 1-100 can solve t by dichotomynSequence.It is different in the case of linear torsional angle waveform
It is tnSequence be it is non-equally spaced, by tnTime series produces the pulse signal of simulation.
Embodiment 4:
In some cases, torsional angle is not simple signal, but may the torsional angle signal containing m-Acetyl chlorophosphonazo, if torsional angle believe
Number are as follows:
Wherein A1=1；ω1=100 π；A2=0.5；ω2=90 π, then θ (tn)=sin (100 π tn)+
0.5sin(90πtn)；
It can obtain
Wherein tcFor the time that shafting rotates a circle, that is, pass through the time of 100 gears, i.e. tc=t100, it can obtain:
sin(100πtc)+0.5sin(90πtc)=0；
Ask the third zero point of the equation, i.e. tc。tcAfter there is error, to accumulate at any time, error linearly increases,
In practical tcIn test process, the influence of sample count clock is also suffered from, therefore seeking the above signal tcWhen, using with letter
Sampling clock consistent time step when number reconstruct, this example 20MHz, 2 π point of phase change can seek the third of the signal
A zero crossing acquires 0.02067815s in this example.
Embodiment 5:
What is generated in embodiment 1-4 is all stationary signal, and torsional angle signal is possible to be multi-modal in practice, humorous between time-varying
Wave torsional vibration signals, if torsional angle signal are as follows:
If A1=1；ε1=0.5；ω1=100 π；A2=0.5；ε2=2；ω2=90 π；
θ (t)=1e-0.5tsin(100πt)+0.5e-2tsin(90πt)；
Wherein tcIt can be searched for by 20MHz fixed step size and acquire 0.02066315s；
N takes 100, and dichotomy can solve tnSequence
Column.
Embodiment 6:
In practical torsional angle model, it is also necessary to consider the influence of noise, Gaussian noise is that probability density function obeys normal state
The noise of distribution.Gaussian Profile is denoted as N (μ, σ2), wherein μ is the mean value (mathematic expectaion) of Gaussian Profile, σ2For Gaussian Profile
Variance, as μ=0, σ2When=1, which is known as standardized normal distribution.The One-dimensional probability of Gaussian Profile is represented by formula:
T is generated in embodiment 5nGaussian noise, the letter of Gaussian noise amplitude and measurement sequence are added on when time series
It makes an uproar than for 100dB.
In conclusion this contains time-varying m-Acetyl chlorophosphonazo torsional vibration signals generator, and compared with mechanical torsional oscillation testboard, structure letter
Single, measurement condition covering comprehensively, can sufficiently examine the precision of Analysis of Torsional Vibration device, while being capable of providing all kinds of linear signals
Or multiple-frequency signal, and Analysis of Torsional Vibration device can be assessed to time-varying m-Acetyl chlorophosphonazo signal processing situation.
It should be noted that, in this document, such as the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of torsional vibration signals generator of m-Acetyl chlorophosphonazo containing time-varying, including master controller (1), it is characterised in that: the master controller
(1) output end of input terminal and first filter (4), second filter (5) and modulus module (6) is electrically connected, the mould
The input terminal of digital-to-analogue block (7) and the output end of third filter (6) are electrically connected, the master controller (1) and SRAM module
(2), FLASH module (3), network card chip (8), USB chip (9) and RS232 module (10) two-way electric connection, the main control
The output end of device (1) and the input terminal of level block (12), optocoupler (13) and digital module (14) are electrically connected.
2. one kind torsional vibration signals generator of m-Acetyl chlorophosphonazo containing time-varying according to claim 1, it is characterised in that: the network interface card core
Piece (8), USB chip (9) and RS232 module (10) and PC computer (11) two-way electric connection.
3. one kind torsional vibration signals generator of m-Acetyl chlorophosphonazo containing time-varying according to claim 1, it is characterised in that: the optocoupler
(13) input terminal of output end and relay (15) is electrically connected.
4. one kind torsional vibration signals generator of m-Acetyl chlorophosphonazo containing time-varying according to claim 1, it is characterised in that: first filter
Wave device (4) and second filter (5) are electrically connected by eQEP bus and eCAP bus and master controller (1) respectively.
5. one kind torsional vibration signals generator of m-Acetyl chlorophosphonazo containing time-varying according to claim 1, it is characterised in that: the main control
Device (1) is electrically connected by ePMW bus and GPIO bus and level block (12) and optocoupler (13) respectively.
6. one kind torsional vibration signals generator of m-Acetyl chlorophosphonazo containing time-varying according to claim 1, it is characterised in that: the main control
Device (1) is electrically connected by XINTF bus and network card chip (8) and USB chip (9).
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