CN109084891A - A kind of rotary body noise measuring system and test method based on stress variation - Google Patents
A kind of rotary body noise measuring system and test method based on stress variation Download PDFInfo
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- CN109084891A CN109084891A CN201811249985.6A CN201811249985A CN109084891A CN 109084891 A CN109084891 A CN 109084891A CN 201811249985 A CN201811249985 A CN 201811249985A CN 109084891 A CN109084891 A CN 109084891A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The present invention provides a kind of rotary body noise measuring systems and test method based on stress variation, wherein the test macro includes: central data processing unit, and the pick up facility and pressure sensor that connect with the central data processing unit；The pressure sensor is connect with the test system, for measuring the stress delta data of the device noumenon described in the rotation process of the rotary body；The pick up facility, the noise sample data generated during rotation for acquiring the rotary body.The present invention improves the accuracy of test, and the detection for the working condition of the rotary body in industrial equipment provides new way, to bring conveniently for the Maintenance and Repair and test job of rotary body.
Description
Technical field
The invention belongs to rotor noise the field of test technology more particularly to a kind of rotation bulk noise surveys based on stress variation
Test system and test method.
Background technique
It include the device largely to be played a role by rotational motion in industrial equipment, wherein may include playing rotation
The rotary body (rotor+armature spindle) transferred to, such as braking brake disk, turbine, wind-force electrical machinery blade etc. device.For ideal
The rigid body of homogenous distribution should perfectly be rotated when not acted on by external force.And in actual conditions, it is transported in long-time
During row, rotor stress deformation, material structure is impaired, by external interference and other reasons, rotor in rotation can internal and
Periodically variable power is generated to outside, generates vibration, air is passed to and generates sound wave, referred to as vibrating noise.So revolving
In the rotation process of swivel, the working condition and situation of its rotor can determine whether out by vibrating noise.
However, in the operational process of industrial equipment, in addition to the vibrating noise of itself, locating for environment there is also a large amount of
Random background noise.The vibrating noise of equipment itself can be mingled with these noises, and when carrying out sound collection, these are interfered
It can not be distinguish, and then can not judge whether to generate vibration.Also, it is difficult to prevent background noise completely in actual use.
In short, in the maintenance process for equipment, it is existing by noise for the working condition and situation of rotary body
The method tested leads to not since there are a large amount of environmental noise, industrial equipments to run noise to rotary body therein
The test based on noise is carried out, and then can not judge the working condition of the rotor in rotary body, rotation can be reflected by being unable to get
The accurate test result of the working condition of body brings security risk for the stable operation of equipment.
Summary of the invention
Based on the above issues, the main purpose of the present invention is to provide a kind of rotary body noise testings based on stress variation
System and test method, to solve defect and deficiency in the prior art.
To solve the above problems, the present invention provide it is a kind of based on stress variation rotary body noise measuring system, for pair
The measurement of test system comprising rotary body；Wherein, the test system is equipped with device noumenon；The rotary body and described device
Ontology connects and carries out the rotation relative to described device ontology；Include:
Central data processing unit, and the pick up facility and pressure sensing that are connect with the central data processing unit
Device；
The pressure sensor is connect with the test system, for measuring described in the rotation process of the rotary body
The stress delta data of device noumenon；
The pick up facility, the noise sample data generated during rotation for acquiring the rotary body；
It is produced according to stress delta data of the described device ontology in the rotary course of the rotary body and rotary body are corresponding
The raw noise sample data, establish mechanical characteristics and acoustic feature corresponding relationship function, and according to the mechanical characteristics with
Acoustic feature corresponding relationship function obtains and the current pressure by the rotary body to the current pressure of described device ontology
The noise of the corresponding rotary body of power.
It preferably, include at least two pressure sensors in the rotary body noise measuring system based on stress variation；
The pressure sensor is set to the armature spindle of the rotary body and the both ends junction of described device ontology, for surveying
Measure the stress delta data of the both ends junction of the device noumenon described in the rotation process of the rotary body.
Preferably, the rotary body noise measuring system based on stress variation includes multiple pick up facilities；
Also, multiple pick up facilities are used for around the ambient sound pickup area for being set to the test system
The ambient sound pickup area acquires the noise that the rotary body generates during rotation by multiple pick up facilities
Sample data.
Preferably, the pick up facility includes voice collection device, and the damping connecting with the voice collection device
Device, and the voice collection device is set to the upper end of the damping device, and by be measured described in the damping device
In the ambient sound pickup area of device.
Preferably, the pick up facility further includes the sound polymerized unit connecting with the voice collection device；
The sound polymerized unit forms a sound zone of convergency incorporated in the periphery of the voice collection device, so as to
The noise of the rotary body after being gathered by sound zone of convergency acquisition.
It preferably, further include range unit；
The range unit is connect with the central data processing unit, for measuring the torque of the rotary body.
It preferably, further include remote control apparatus and network equipment；
The remote control apparatus is all connected with the pick up facility and the pressure sensor；
The central data processing unit is connect with the network equipment；
The remote control apparatus is connected with the network equipment；
The remote control apparatus is referred to according to the central data processing unit by the test that the network equipment is sent
The control pick up facility and the pressure sensor is enabled to be tested, to obtain the stress delta data and the noise sample
Notebook data；And by by the stress delta data and the noise sample data to the institute being connect with the remote control apparatus
Network equipment is stated to return to the central data processing unit.
Preferably, the remote control apparatus and the network equipment pass through wireless network connection.
Preferably, the rotary body noise measuring system further includes power supply unit and storage device；
The power supply unit and the storage device are connect with the central data processing unit.
In addition, to solve the above problems, the present invention also provides it is a kind of based on stress variation rotary body noise testing method,
Include:
Draft the full work test section based on operating condition index of Devices to test；The operating condition index includes temperature, revolving speed
And torque；
Pressure sensor, pick up facility are placed in corresponding predeterminated position；
It controls the rotary body in the Devices to test and starts rotating operation, and adjust corresponding to the full work test section
Different operating conditions；Also, according to the full work test section, central data processing unit is controlled, the pressure is utilized
The pressure that sensor acquires the rotary body of the test system is acquired as stress delta data, and using the pick up facility
The noise sample data of the rotary body of the test system；
By the central data processing unit, according to the collected full work test section of institute it is corresponding it is described by
Power delta data and the noise sample data establish mechanical characteristics and acoustic feature corresponding relationship function；
According to the mechanical characteristics and acoustic feature corresponding relationship function, by the rotary body to described device ontology
Current pressure obtains the noise of the rotary body corresponding with the current pressure.
Preferably, described " by the central data processing unit, according to the collected full work test section of institute
The corresponding stress delta data and the noise sample data establish mechanical characteristics and acoustic feature corresponding relationship function " packet
It includes:
All noise sample data collected to institute carry out quantification of intensities, obtain and each noise sample number
According to corresponding amplitude；And Fourier transformation is carried out to all noise sample data, it obtains and each noise sample data
Corresponding frequency；Also, the amplitude and the frequency are arranged according to time domain respectively；
Based on the full work test section, pressure, amplitude and frequency corresponding in wherein each section are divided
It is not grouped；
It calculates separately the average value in each grouping of each section, maximum value, minimum value, variance, meet 2 σ of normal distribution
The number of interior data obtains pressure array, amplitude array and the frequency array in each section；
Using pressure array as dependent variable, using amplitude array and frequency array as independent variable, establish the mechanical characteristics with
Acoustic feature corresponding relationship function.
The present invention provides a kind of rotary body noise measuring system and test method based on stress variation, through setting in
The pick up facility and pressure sensor of data processing equipment connection are entreated, measures the rotary body in test system respectively in rotary course
In stress delta data and noise sample data establish mechanics spy and by the matching relationships of mechanical characteristics and acoustic feature
Sign and acoustic feature corresponding relationship function, and according to the function, by the rotary body to the current pressure of described device ontology,
Obtain corresponding noise.To realize during the test maintaining for rotary body, only by mechanical characteristics, can push away
The acoustic feature and operating condition of the disconnected rotary body out, avoid in equipment running process, and environmental noise, industrial equipment run noise
Etc. external interferences to test generate influence, improve the accuracy of test, be industrial equipment in rotary body working condition
Detection provide new way, for for the Maintenance and Repair and test job of rotary body bring conveniently.
Detailed description of the invention
Fig. 1 is that the modular circuit of the rotary body noise measuring system in the application based on stress variation in first embodiment connects
Connect schematic diagram；
Fig. 2 is that the device circuit of the rotary body noise measuring system in the application based on stress variation in first embodiment connects
Connect schematic diagram；
Fig. 3 is the device electricity in the rotary body noise measuring system in the application based on stress variation in second embodiment
Road connection schematic diagram；
Fig. 4 is the pick up facility of the rotary body noise measuring system in the application based on stress variation in 3rd embodiment
In the arrangement schematic diagram of the ambient sound pickup area of test system；
Fig. 5 is the pick up facility of the rotary body noise measuring system in the application based on stress variation in 3rd embodiment
Apparatus structure schematic diagram；
Fig. 6 is that the modular circuit of the rotary body noise measuring system in the application based on stress variation in 3rd embodiment connects
Connect schematic diagram；
Fig. 7 is that the modular circuit of the rotary body noise measuring system in the application based on stress variation in fourth embodiment connects
Connect schematic diagram；
Fig. 8 is the process signal of the rotary body noise testing method in the application based on stress variation in the 5th embodiment
Figure；
Fig. 9 is that the step S40 of the rotary body noise testing method in the application based on stress variation in fourth embodiment is thin
The flow diagram of change.
Appended drawing reference:
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, in which the same or similar labels are throughly indicated same or like
Element or element with the same or similar functions.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Embodiment 1:
With reference to Fig. 1-2, the present embodiment provides a kind of rotary body noise measuring systems 1 based on stress variation, for packet
The measurement of test system containing rotary body；Wherein, the test system is equipped with device noumenon；The rotary body and described device sheet
Body connects and carries out the rotation relative to described device ontology；Include:
Central data processing unit 11, and the pick up facility 12 and pressure that are connect with the central data processing unit 11
Force snesor 13；
The pressure sensor 13 is connect with the test system, for measuring the institute in the rotation process of the rotary body
State the stress delta data of device noumenon；
The pick up facility 12, the noise sample data generated during rotation for acquiring the rotary body；
It is produced according to stress delta data of the described device ontology in the rotary course of the rotary body and rotary body are corresponding
The raw noise sample data, establish mechanical characteristics and acoustic feature corresponding relationship function, and according to the mechanical characteristics with
Acoustic feature corresponding relationship function obtains and the current pressure by the rotary body to the current pressure of described device ontology
The noise of the corresponding rotary body of power.
It is above-mentioned, central data processing unit 11, can be the controlling terminal with certain computing capability, may include but
It is not limited to mainframe, Desktop PC, portable PC, tablet computer etc..In the present embodiment, it is preferred that can be large-scale main
Machine, such as 2094 type mainframe type computer of IBM System z9Typ.
Above-mentioned, pick up facility 12 can be the sound collection equipment with voice data acquisition function, for example, can be
Microphone.In the present embodiment, it is preferred that can be Sony ECM-PC60 type electret capacitor microphone.
Above-mentioned, the setting position of pick up facility 12 can be in the peripheral region of test system, for example, can be by microphone
It is set in test system, the side of rotary body, in order to the vibration noise generated in clearer its rotary course of acquisition.
It is above-mentioned, pressure sensor 13, for obtaining rotary body in rotary course, for the current pressure of device noumenon generation
Power, setting position are the position that can measure the current pressure.
Above-mentioned, central data processing unit 11 is electrically connected with pick up facility 12 and pressure sensor 13.Central data
Processing unit 11 can directly control the beginning and end of the test job of pick up facility 12 and pressure sensor 13, and for institute
Acquire the transmission and operational analysis of data.In addition, its operational analysis works, related data obtained can also be sent
To server end or cloud, to realize that carry out operation by server end or cloud passes through to reduce the operand of local side
Server end or cloud carry out being managed collectively unified test and maintenance.
Above-mentioned, test philosophy is as follows based on the present embodiment:
Rotary body (rotor+armature spindle) in test system when rotated, if not generating vibration (that is, rotor is lossless
Under state), then the power that device noumenon is subject to should be rotor together with bearing etc. assist rotor rotation mechanism (rotary body,
In include rotor, and assist rotation mechanism) gravity, i.e. Fg；Assuming that being positive direction in horizontal direction, the vibration of rotor is all
Do what periodic accelerations variation generated by rotary body.In order to provide this acceleration, it is necessary to generate a power F.Then pressure passes
Power of the sensor 13 at this time between collected rotor (mechanism including assisting rotor rotation) and other mechanisms should be Fg+F；By
While vibration, sound wave (vibrating noise) can be also generated.Sound wave and pressure change generate simultaneously, it is possible to according to sound wave and
The relationship of pressure establishes simple positive association.Each acoustic characteristic corresponds to pressure characteristic.Therefore by establishing pressure
The corresponding relationship of the amplitude of variation and frequency of sound wave, also strong size and some position, establishes a mechanical characteristics and acoustics
Feature corresponding relationship function can be based on the function, realize through power to determine whether there is the intensity of noise and noise
And frequency.
In addition, it should be noted that, the existing operating condition for including the test system of rotary body carries out preservation & testing
Method mainly includes following several:
1, dB meter mensuration: can only learn the decibel of space somewhere sound, and decibel is relative intensity rather than absolutely strong
Degree is biased to human feeling rather than is quantified to noise.
2, sonic wave amplitude and frequency measurement: background noise and rotor noise are mingled with together, it is necessary to first learn that background is made an uproar
The frequency spectrum of sound rejects background noise frequency spectrum from test sample.If background noise frequency spectrum can not obtain in time or background is made an uproar
Sound randomness is very high, will be unable to obtain individual rotor noise sample.
3, laser acquisition method: for the rotor to work in small space, and to the rotor of contact non-air working medium, nothing
Method installs laser radar, or can not be irradiated to rotor surface.
4, install vibrating sensor method: equipment surface possibly can not install vibrating sensor, and vibrating sensor can not pacify
It on high speed rotation rotor, can be only installed at other positions, can not directly measure the vibration of rotor.
The present embodiment is directed to through the rotor in rotary body, in rotary course, generated vibrating noise, from
And judge the working condition of corresponding rotor.During the test, in the process of running due to industrial equipment, in addition to itself
Except vibrating noise, there are a large amount of background noise, external environment causes to be surveyed local environment there is also other interfering noises
There are a large amount of interference signals in the vibrating noise obtained, cause tremendous influence for the accuracy of test result.
The present embodiment provides a kind of rotary body noise measuring systems 1 based on stress variation, pass through setting and central data
The pick up facility 12 and pressure sensor 13 that processing unit 11 connects measure the rotary body in test system in rotary course respectively
In stress delta data and noise sample data establish mechanics spy and by the matching relationships of mechanical characteristics and acoustic feature
Sign and acoustic feature corresponding relationship function, and according to the function, by the rotary body to the current pressure of described device ontology,
Obtain corresponding noise.To realize during the test maintaining for rotary body, only by mechanical characteristics, can push away
The acoustic feature and operating condition of the disconnected rotary body out, avoid in equipment running process, and environmental noise, industrial equipment run noise
Etc. external interferences to test generate influence, improve the accuracy of test, be industrial equipment in rotary body working condition
Detection provide new way, for for the Maintenance and Repair and test job of rotary body bring conveniently.
Embodiment 2:
With reference to Fig. 3, based on the above embodiment 1, the present embodiment provides a kind of rotary body noise testings based on stress variation
System 1, it is described based on stress variation rotary body noise measuring system 1 in include at least two pressure sensors 13；
The pressure sensor 13 is set to the armature spindle of the rotary body and the both ends junction of described device ontology, is used for
Measure the stress delta data of the both ends junction of the device noumenon described in the rotation process of the rotary body.
It is above-mentioned, it include rotary body in test system, rotary body includes set on intermediate rotor, through the rotor of rotor
Axis, and connect by the both ends that armature spindle is different from center roller with device noumenon, to realize the rotation relative to device noumenon
Turn.
When in order to rotate for rotary body relative to device noumenon, device noumenon is applied to as caused by vibration
Pressure pressure sensor 13 is set in armature spindle and device noumenon junction, in order to more accurately obtain so in the present embodiment
It obtains the stress delta data and an at least pressure sensor 13 is respectively set in the both ends junction of armature spindle and device noumenon,
To improve accuracy.
Embodiment 3:
With reference to Fig. 4-6, based on the above embodiment 1, the present embodiment provides a kind of rotation bulk noise surveys based on stress variation
Test system 1, wherein the rotary body noise measuring system 1 based on stress variation includes multiple pick up facilities 12；
Also, multiple pick up facilities 12 are used for around the ambient sound pickup area for being set to the test system
Acquire what the rotary body generated during rotation by multiple pick up facilities 12 in the ambient sound pickup area
Noise sample data.
Above-mentioned, pick up facility 12 may include in the present embodiment multiple.Specifically, multiple pick up facilities 12, respectively
It is connect with central data processing unit 11, for acquiring rotary body generated vibration noise in rotary course.
Each pick up facility 12, is all set in around test system, is set in ambient sound pickup area, wherein week
Enclosing sound collection region is the position that the vibration noise of wherein rotary body can be collected in test system, which can be to enclose
Around the region of test system outer ring, or the position near the rotary body in test system, it is specific with rotary body
Apart from when being no more than 1 meter, such as the vibration noise of brake disc being detected, ambient sound pickup area is apart from 2 lis of rotary body
The region of rice.It specifically, for example can be the outer ring of rotary body horizontal plane, or can be the upper and lower ends of rotary body etc. area
Domain.Wherein, ambient sound pickup area can be in test system, or on the outside of test system.In the present embodiment, pass through
Multiple pick up facilities 12 are set in the ambient sound pickup area of test system, are adopted simultaneously for the noise of rotary body
Collection, to substantially increase the accuracy of sound collection, and can be in different angle for shaking noise caused by rotary body
It is acquired.
Further, the pick up facility 12 include voice collection device 121, and with the voice collection device 121
The damping device 122 of connection, and the voice collection device 121 is set to the upper end of the damping device 122, and passes through institute
It states in the ambient sound pickup area of test system described in damping device 122.
Industrial equipment in the process of running, generally has certain vibration, and pick up facility 12 is acquiring vibration therein
When noise, greatly pick up facility 12 may be caused to shake with it or shift due to vibration, on the one hand cause to generate a large amount of background
Influence of noise test result, on the other hand may be caused due to the displacement of pick up facility 12 can not be in correct position to rotary body
Vibration noise be acquired.
In the present embodiment, by the way that a damping device 122 is arranged in the lower end of voice collection device 121, for offsetting industry
Equipment generated vibration in the process of running, is avoided pick up facility 12 and is vibrated therewith due to the vibration of industrial equipment, mentioned
The high stability of the placement of pick up facility 12.
Further, the pick up facility 12 further includes the sound polymerized unit connecting with the voice collection device 121
123；
The sound polymerized unit 123 forms a sound polymeric area incorporated in the periphery of the voice collection device 121
Domain, in order to acquire the noise of the rotary body after gathering by the sound zone of convergency.
Above-mentioned, pick up facility 12, may others equipment or ambient noise during being acquired for noise
In the presence of, cause pick up facility 12 collect vibration noise other than interference noise.In the present embodiment, in the sound of pick up facility 12
On the outside of the periphery of acquisition device 121, such as microphone, a sound polymerized unit 123 is set, its noise collected is gathered
Hold together, makes voice collection device 121 that there is certain orientation for the acquisition of noise.Wherein, sound polymerized unit 123 can be fan
Shape, the cylindrical shape of trapezoidal, tapering type setting；It preferably, can be the columnar sound polymerized unit 123 of tapering type setting,
Wherein voice collection device 121 is set to lesser one end of diameter of the cylinder, and the other end being relatively large in diameter is to test system
Rotary body side, the cylindrical shape of the tapering type setting is interior to form the sound zone of convergency with certain orientation, thus significantly
The directionality of sound collection is improved, ambient background noise is reduced for the interference of the acquisition of vibrating noise, improves vibration and make an uproar
The purity of sound improves the accuracy of test result.
It further, further include range unit 14；
The range unit 14 is connect with the central data processing unit 11, for measuring the torque of the rotary body.
It is above-mentioned, range unit 14, for the torque before test system operation or in operational process, to the rotor of rotary body
It measures.Wherein, the range unit 14 can include but is not limited to laser range finder, infrared range-measurement system, based on image recognition
Rangefinder etc..
Embodiment 4:
With reference to Fig. 7, based on the above embodiment 1, the present embodiment provides a kind of rotary body noise testings based on stress variation
System 1, wherein further include remote control apparatus 15 and network equipment 16；
The remote control apparatus 15 is all connected with the pick up facility 12 and the pressure sensor 13；
The central data processing unit 11 is connect with the network equipment 16；
The remote control apparatus 15 and the network equipment 16 connect；
The remote control apparatus 15 is sent according to the central data processing unit 11 by the network equipment 16
Test instruction controls the pick up facility 12 and the pressure sensor 13 is tested, with obtain the stress delta data and
The noise sample data；And it will be filled by the stress delta data and the noise sample data to the long-range control
The network equipment 16 for setting 15 connections is returned to the central data processing unit 11.
Further, the remote control apparatus 15 passes through wireless network connection with the network equipment 16.
Further, the rotary body noise measuring system further includes power supply unit 17 and storage device 18；
The power supply unit 17 and the storage device 18 are connect with the central data processing unit 11.
Above-mentioned, power supply unit 17 can be alternating current, or direct current, such as lithium battery power supply.Storage device
18, the collected test data of institute during being tested for memory test system.
In the environment actually tested, large-scale industrial equipment may be set in the environment such as noisy workshop, be surveyed
When examination personnel test, due to test have the regular hour require, i.e., for the first time test need by different times, temperature
It is successively tested under the indicator conditions such as degree, so that relation function is constructed, and if depositing in environment at industrial equipment at this time
In the huge noise that equipment operation generates, the normal operating conditions of tester is easily influenced, or even works long hours and will cause
A degree of ear-drum is impaired.
So in the present embodiment, by setting remote control apparatus 15 and network equipment 16, passing through network wireline cable
Or wireless network realizes connection, and rotary body noise measuring system provided in the present embodiment is divided into user's operation to reach
Control terminal, and be set to the test lead of test system side.Operation its control terminal that as a result, can be long-range, to pass through network
Cable or wireless network control test lead, to realize the purpose of remote testing.To be the test job of tester
Convenience is created, user experience is improved.
Embodiment 5:
With reference to Fig. 8-9, the present invention also provides a kind of rotary body noise testing methods based on stress variation, comprising:
Step S10 drafts the full work test section based on operating condition index of Devices to test；The operating condition index includes temperature
Degree, revolving speed and torque；
Pressure sensor 13, pick up facility 12 are placed in corresponding predeterminated position by step S20；
Step S30 controls the rotary body in the Devices to test and starts rotating operation, and adjusts to the full work and test
The corresponding different operating conditions of section；Also, according to the full work test section, control central data processing unit 11, benefit
The pressure sensor 13 is used to acquire the pressure of the rotary body of the test system as stress delta data, and described in utilizing
Pick up facility 12 acquires the noise sample data of the rotary body of the test system；
Step S40, by the central data processing unit 11, according to the collected full work test section pair of institute
The stress delta data and the noise sample data answered establish mechanical characteristics and acoustic feature corresponding relationship function；
Step S50, according to the mechanical characteristics and acoustic feature corresponding relationship function, by the rotary body to the dress
The current pressure for setting ontology obtains the noise of the rotary body corresponding with the current pressure.
Further, the step S40 is " collected described complete according to institute by the central data processing unit 11
The work corresponding stress delta data of test section and the noise sample data establish mechanical characteristics and acoustic feature pair
Answer relation function " include:
Step S41, all noise sample data collected to institute carry out quantification of intensities, obtain and make an uproar with each described
The corresponding amplitude of sound sample data；And Fourier transformation is carried out to all noise sample data, it obtains and each noise
The corresponding frequency of sample data；Also, the amplitude and the frequency are arranged according to time domain respectively；
Step S42 is based on the full work test section, to pressure, amplitude and frequency corresponding in wherein each section
Rate is grouped respectively；
Step S43 calculates separately the average value in each grouping of each section, maximum value, minimum value, variance, meets just
State is distributed the number of data in 2 σ, obtains pressure array, amplitude array and the frequency array in each section；
Step S44, using amplitude array and frequency array as independent variable, establishes the power using pressure array as dependent variable
Learn feature and acoustic feature corresponding relationship function.
It is above-mentioned, in method provided by the present embodiment, in order to establish total pressure-audio frequency characteristics corresponding relationship, it is necessary to design
Whole tone frequency range measurement experiment to realize all Vibration Condition simulations, and constructs relation function.In the present embodiment, following three are determined
Kind for include rotary body test system whole operating condition indexs, be respectively as follows: temperature, revolving speed and torque.
In turn, the full work test section based on operating condition index of Devices to test is drafted.Specifically, according to temperature, revolving speed,
The order of torque is minimum adjusted value with measurement accuracy, to another pole of the index since a limiting value of the operating condition
Direction is limited, the working condition of equipment is successively changed, sets full work test section.
Wherein, the difference between test section can be larger, and in the present embodiment, preferred temperature can be made with 0.5 DEG C
For minimum adjusted value, revolving speed is using 2 π rad/s as minimum adjusted value, and torque is using 1N/m as minimum adjusted value.
Due to the time for the test section that works entirely, and adjust to test section condition auxiliary section total amount of data it is huge
Greatly, test section can be distributed, the testing time is reduced using the method for multiple tests while progress.
In addition, in order to save the energy, can according to temperature from high to low, revolving speed from high to low, torque from high to low suitable
Sequence is realized minimum for the energy consumption of equipment during the test.
Such as: 0.1 DEG C of temperature measurement accuracy, 18 DEG C to 70 DEG C of operating temperature range；0 to 100 π rad/s of working range turns
Fast 2 π rad/s of precision；Torque accuracy 0.01N/m, working range 0 to 100N/m；Then when temperature 70 C, it is ensured that 2 π rad/s of revolving speed,
Torque 0.01N/m can be used as a test section；Operating condition successively is changed according to measurement accuracy, can get 700x 50x altogether
10000 total 2.6x 108Group test section.
It, can be by all tests in full work test section after the grouping setting for the test section that works entirely
Section is lined up, and central data processing unit 11 is inputted, for controlling test system work.At this point, need to be by pick up facility 12
It is placed on damping device 122, range unit 14 is placed on specified position.Furthermore, it is possible to be surround with multiple pick up facilities 12
It is placed in the ambient sound pickup area of test system, to improve the accuracy of data acquisition.
After installation pressure sensor 13, pick up facility 12, range unit 14, starting device adjusts operating condition, executes full work
Make the test of test section.Also, according to time domain, with certain frequency (such as some value of 20Hz into 100Hz) frequency, simultaneously
The power and audio that record pressure sensor 13 is subject to, are stored in the storage device 18 of central data processing unit 11.
Wherein, the step S40, " by the central data processing unit 11, according to the collected full work of institute
The corresponding stress delta data of test section and the noise sample data establish mechanical characteristics pass corresponding with acoustic feature
It is function " mechanical characteristics and acoustic feature corresponding relationship function are established by data analysis step for data analysis step.Extremely
This, has obtained the test system, under whole operating conditions, rotor (including assist rotor rotation mechanism, rotary body) and other
Pressure between mechanism (device noumenon), the association with noise have been established and finish.By to final binary function (mechanical characteristics with
Acoustic feature corresponding relationship function) lookup, input pressure character numerical value (current pressure) can be inferred to make an uproar in this case
The case where sound.
In addition, should carry out at least 3 retests in order to improve the accuracy of pressure Yu noise function and collect data.
For the equipment of rotor quick abrasion speed in work, multiple equipment in different wear stages should be found, are tested.Each
Oneself pressure and relation function should be all established under wear intensity.When applying function, the abrasion condition of the equipment should be first determined.
The present embodiment provides a kind of rotary body noise testing methods based on stress variation, at setting and central data
Pick up facility 12 and pressure sensor 13 that device 11 connects are managed, measures the rotary body in test system respectively in rotary course
Stress delta data and noise sample data establish mechanical characteristics and by the matching relationships of mechanical characteristics and acoustic feature
With acoustic feature corresponding relationship function, and obtained according to the function by the rotary body to the current pressure of described device ontology
Corresponding noise out.To realize during the test maintaining for rotary body, only by mechanical characteristics, can infer
The acoustic feature and operating condition of the rotary body out, avoids in equipment running process, environmental noise, industrial equipment operation noise etc.
The influence that external interference generates test, improves the accuracy of test, is the working condition of the rotary body in industrial equipment
Detection provides new way, to bring conveniently for the Maintenance and Repair and test job of rotary body.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in one as described above
In storage medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that terminal device (it can be mobile phone,
Computer, server or network equipment etc.) execute method described in each embodiment of the present invention.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of rotary body noise measuring system based on stress variation, for the measurement to the test system comprising rotary body；
Wherein, the test system include device noumenon and be set to the intrinsic rotary body of described device；The rotary body and the dress
Ontology is set to connect and carry out the rotation relative to described device ontology；It is characterised by comprising:
Central data processing unit, and the pick up facility and pressure sensor that are connect with the central data processing unit；
The pressure sensor is connect with the test system, for measuring the device described in the rotation process of the rotary body
The stress delta data of ontology；
The pick up facility, the noise sample data generated during rotation for acquiring the rotary body；
It is generated according to stress delta data of the described device ontology in the rotary course of the rotary body and rotary body are corresponding
The noise sample data establish mechanical characteristics and acoustic feature corresponding relationship function, and according to the mechanical characteristics and acoustics
Feature corresponding relationship function obtains and the current pressure pair by the rotary body to the current pressure of described device ontology
The noise for the rotary body answered.
2. the rotary body noise measuring system as described in claim 1 based on stress variation, which is characterized in that described to be based on stress
It include at least two pressure sensors in the rotary body noise measuring system of variation；
The pressure sensor is set to the armature spindle of the rotary body and the both ends junction of described device ontology, for measuring
The stress delta data of the both ends junction of device noumenon described in the rotation process of the rotary body.
3. the rotary body noise measuring system as described in claim 1 based on stress variation, which is characterized in that described to be based on stress
The rotary body noise measuring system of variation includes multiple pick up facilities；
Also, multiple pick up facilities are around the ambient sound pickup area for being set to the test system, for described
Ambient sound pickup area acquires the noise sample that the rotary body generates during rotation by multiple pick up facilities
Data.
4. the rotary body noise measuring system as described in claim 1 based on stress variation, which is characterized in that the pick up facility
Including voice collection device, and the damping device being connect with the voice collection device, and the voice collection device is set
In the upper end of the damping device, and in the ambient sound pickup area for passing through test system described in the damping device.
5. the rotary body noise measuring system as described in claim 1 based on stress variation, which is characterized in that the pick up facility
It further include the sound polymerized unit being connect with the voice collection device；
The sound polymerized unit forms a sound zone of convergency incorporated in the periphery of the voice collection device, in order to logical
Cross the noise of the rotary body after the sound zone of convergency acquisition is gathered.
6. the rotary body noise measuring system as described in claim 1 based on stress variation, which is characterized in that further include ranging dress
It sets；
The range unit is connect with the central data processing unit, for measuring the torque of the rotary body.
7. the rotary body noise measuring system as described in claim 1 based on stress variation, which is characterized in that further include remotely controlling
Device and network equipment processed；
The remote control apparatus is all connected with the pick up facility and the pressure sensor；
The central data processing unit is connect with the network equipment；
The remote control apparatus is connected with the network equipment；
The test instruction control that the remote control apparatus is sent according to the central data processing unit by the network equipment
It makes the pick up facility and the pressure sensor is tested, to obtain the stress delta data and the noise sample number
According to；And by by the stress delta data and the noise sample data to the net being connect with the remote control apparatus
Network device is returned to the central data processing unit.
8. the rotary body noise measuring system as claimed in claim 7 based on stress variation, which is characterized in that the long-range control
Device and the network equipment pass through wireless network connection.
9. a kind of rotary body noise testing method based on stress variation characterized by comprising
Draft the full work test section based on operating condition index of Devices to test；The operating condition index includes temperature, revolving speed and turns
Square；
Pressure sensor, pick up facility are placed in corresponding predeterminated position；
It controls the rotary body in the Devices to test and starts rotating operation, and adjust corresponding not to the full work test section
Same operating condition；Also, according to the full work test section, central data processing unit is controlled, the pressure sensing is utilized
Device acquires the pressure of the rotary body of the test system as stress delta data, and using described in pick up facility acquisition
The noise sample data of the rotary body of test system；
By the central data processing unit, become according to the corresponding stress of the collected full work test section of institute
Change data and the noise sample data establish mechanical characteristics and acoustic feature corresponding relationship function；
According to the mechanical characteristics and acoustic feature corresponding relationship function, by the rotary body to the current of described device ontology
Pressure obtains the noise of the rotary body corresponding with the current pressure.
10. the rotary body noise testing method as claimed in claim 9 based on stress variation, which is characterized in that described " to pass through institute
Central data processing unit is stated, according to the corresponding stress delta data of the collected full work test section of institute and institute
State noise sample data and establish mechanical characteristics and acoustic feature corresponding relationship function " include:
All noise sample data collected to institute carry out quantification of intensities, obtain and each noise sample data pair
The amplitude answered；And Fourier transformation is carried out to all noise sample data, it obtains corresponding with each noise sample data
Frequency；Also, the amplitude and the frequency are arranged according to time domain respectively；
Based on the full work test section, pressure, amplitude and frequency corresponding in wherein each section are divided respectively
Group；
It calculates separately the average value in each grouping of each section, maximum value, minimum value, variance, meet number in 2 σ of normal distribution
According to number, obtain pressure array, amplitude array and the frequency array in each section；
Using pressure array as dependent variable, using amplitude array and frequency array as independent variable, the mechanical characteristics and acoustics are established
Feature corresponding relationship function.
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| CN114739305A (en) * | 2020-12-24 | 2022-07-12 | 江苏金风科技有限公司 | Method, device and system for determining torsional deformation of blade, controller and medium |
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