CN107159435A - Method and device for adjusting working state of mill - Google Patents
Method and device for adjusting working state of mill Download PDFInfo
- Publication number
- CN107159435A CN107159435A CN201710379281.XA CN201710379281A CN107159435A CN 107159435 A CN107159435 A CN 107159435A CN 201710379281 A CN201710379281 A CN 201710379281A CN 107159435 A CN107159435 A CN 107159435A
- Authority
- CN
- China
- Prior art keywords
- grinding machine
- shock
- microphone array
- toe
- voice signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The disclosure provides a method and a device for adjusting the working state of a mill. The method comprises the following steps: collecting a sound signal of the operation of the mill, and extracting an impact data frame of the impact of the grinding medium on the lining plate from the sound signal; locating an impact location where the grinding media impacts a liner plate according to the impact data frame; determining a toe of the mill from the impact location; and judging whether the impact frequency of the impact position above the toe part is consistent with a preset frequency, and if not, adjusting the working state of the mill. By adopting the scheme, the working state of the mill can be timely adjusted, the liner plate above the toe part can be directly impacted by the grinding medium as less as possible, the optimal working state of the mill can be kept as much as possible, and the overall working efficiency of the mill is improved.
Description
Technical field
This disclosure relates to data processing field, in particular it relates to a kind of Mill Working state method of adjustment and device.
Background technology
Grinding machine is after material is broken, then carries out the key equipment of attrition grinding, is particularly important in industrial production
Super-fine grinder generates equipment, is widely used in the industries such as metallurgy, mine, building materials and chemical industry.Generally, grinding machine can be set including level
The parts such as cylinder, charging aperture, the discharging opening put.Material after broken is mixed through the abrading-ball in charging aperture to cylinder, with cylinder, water
Close, cylinder around horizontal axis turned round with certain rotating speed when, grind medium (including abrading-ball and material) in centrifugal force and frictional force
In the presence of, it is brought to after certain altitude, is left downwards by self gravitation effect, in such turning course, abrading-ball constantly hits
Material plays abrasive action.Material is ground to form in cylinder after satisfactory fine particle, can be discharged through discharging opening.
In actual application, as Fruit grinder remains fixed rotary speed working, then abrading-ball hits material can only be
Optimum Working is in certain a period of time, makes grinding operating efficiency optimal.That is, the rotating speed such as Fruit grinder can not be with
The change of the crushing state of material, is adjusted in time, the whole work efficiency of grinding machine can be influenceed.
The content of the invention
It is a general object of the present disclosure to provide a kind of Mill Working state method of adjustment and device, it can be worked according to grinding machine
Voice signal analyze grinding machine working condition, and when needed in time adjustment mill speed, be favorably improved the entirety of grinding machine
Operating efficiency.
To achieve these goals, disclosure first aspect provides a kind of Mill Working state method of adjustment, including：
The voice signal of grinding machine work is gathered, is extracted from the voice signal and grinds the shock data that medium hits liner plate
Frame；
According to the shock data frame, the impingement position that medium hits liner plate is ground described in positioning；
According to the impingement position, the toe of the grinding machine is determined；
Judge the shock number of times that the impingement position is located above the toe, if be consistent with preset times, if not
Symbol, then adjust the Mill Working state.
In the first possible implementation of first aspect, the voice signal of the collection grinding machine work, including：
By being laid in the microphone array of the grinding machine near-field region, the voice signal is gathered；
Wherein, the microphone array is in arc structure, and the cylinder arc of the radian of the arc structure and the grinding machine
Degree matches, and the microphone array includes N number of microphone laid according to spacing d, N=L/d and N >=3, d≤λmin/ 2, λmin
For the minimum wavelength of the voice signal, L is the acquisition range of the microphone array,R is the cylinder
The radius of body, θ is the acquisition angles of the microphone array, and θ value is 50~90 °.
With reference to the first possible implementation of first aspect, in second of possible implementation, the Mike
Wind array spatially corresponds to the most concentration impingement region of the grinding machine, and the top covering of the microphone array is described
The distance between detection zone above toe, the microphone array and described cylinder are rs, 0<rs≤2L2/λmax, λmaxFor
The maximum wavelength of the voice signal.
In the third possible implementation of first aspect, the extraction from the voice signal grinds medium and hit
The shock data frame of liner plate is hit, including：
Sub-frame processing is carried out to the voice signal, the amplitude maximum Max per frame, the amplitude minimum value per frame is obtained
Min, frequency domain energy and P per framefAnd the frequency domain energy average value P per framea；
From all frames that the sub-frame processing is obtained, extract the shock data frame, the shock data frame meet with
Lower condition：
Amplitude maximum Max is not more than default negative sense threshold value and frequency not less than pre-set forward threshold value, amplitude minimum M in
Domain energy and PfNot less than preset energy threshold valueP0Headed by task state adjustment institute collected sound signal when
Domain energy and PtFor this working condition adjust institute collected sound signal time domain energy and.
In the 4th kind of possible implementation of first aspect, if the wheat by being laid in the grinding machine near-field region
Gram wind array, gathers the voice signal, then described according to the shock data frame, and positioning is described to grind medium shock liner plate
Impingement position, including：
Using auditory localization technology, the corresponding maximum sound source position of each shock data frame is oriented, and be transformed into 0~θ
Angular range in, be used as the impingement position；
Wherein, 0 in the bottom correspondence angular range of the microphone array, the microphone array it is most upper
θ in side's correspondence angular range.
It is described to determine in the 5th kind of possible implementation with reference to the 4th kind of possible implementation of first aspect
The toe of the grinding machine, including：
According to predetermined angle, the angular range is divided into multiple angular intervals；
According to the impingement position, the corresponding shock number of times of each angular interval is counted, obtains hitting number of times highest two
Individual angular interval；
By in described two angular intervals, the maximum angular interval of angle value is defined as the toe of the grinding machine.
With reference to the 5th kind of possible implementation of first aspect, in the 6th kind of possible implementation, adjacent angular
Partly overlapped between interval.
In the 7th kind of possible implementation of first aspect, the adjustment Mill Working state, including：
If the shock number of times is higher than the preset times, reduction of speed processing is carried out to the grinding machine；
If the shock number of times is less than the preset times, speed-raising processing is carried out to the grinding machine.
Disclosure second aspect provides a kind of Mill Working state adjusting apparatus, and described device includes；
Sound signal collecting module, the voice signal for gathering grinding machine work；
Data frame extraction module, the shock data frame that medium hits liner plate is ground for being extracted from the voice signal；
Impingement position locating module, grinds hitting for medium shock liner plate for according to the shock data frame, positioning to be described
Hit position；
Toe determining module, for according to the impingement position, determining the toe of the grinding machine；
Working condition adjusting module, for judging the shock number of times that the impingement position is located above the toe, if
It is consistent with preset times, if be not inconsistent, adjusts the Mill Working state.
In the first possible implementation of second aspect, the sound signal collecting module, for by laying
In the microphone array of the grinding machine near-field region, the voice signal is gathered；
Wherein, the microphone array is in arc structure, and the cylinder arc of the radian of the arc structure and the grinding machine
Degree matches, and the microphone array includes N number of microphone laid according to spacing d, N=L/d and N >=3, d≤λmin/ 2, λmin
For the minimum wavelength of the voice signal, L is the acquisition range of the microphone array,R is the cylinder
The radius of body, θ is the acquisition angles of the microphone array, and θ value is 50~90 °.
With reference to the first possible implementation of second aspect, in second of possible implementation, the Mike
Wind array spatially corresponds to the most concentration impingement region of the grinding machine, and the top covering of the microphone array is described
The distance between detection zone above toe, the microphone array and described cylinder are rs, 0<rs≤2L2/λmax, λmaxFor
The maximum wavelength of the voice signal.
In the third possible implementation of second aspect, the data frame extraction module includes：
Sub-frame processing module, for the voice signal carry out sub-frame processing, obtain per frame amplitude maximum Max,
Amplitude minimum M in per frame, frequency domain energy and P per framefAnd the frequency domain energy average value P per framea；
Data frame extracting sub-module, for from all frames that the sub-frame processing is obtained, extracting the shock data frame,
The shock data frame meets following condition：
Amplitude maximum Max is not more than default negative sense threshold value and frequency not less than pre-set forward threshold value, amplitude minimum M in
Domain energy and PfNot less than preset energy threshold valueP0Headed by task state adjustment institute collected sound signal when
Domain energy and PtFor this working condition adjust institute collected sound signal time domain energy and.
In the 4th kind of possible implementation of second aspect, if the sound signal collecting module is by being laid in
The microphone array of the grinding machine near-field region, gathers the voice signal, then the impingement position locating module, for utilizing
Auditory localization technology, orients the corresponding maximum sound source position of each shock data frame, and is transformed into 0~θ angular range,
It is used as the impingement position；
Wherein, 0 in the bottom correspondence angular range of the microphone array, the microphone array it is most upper
θ in side's correspondence angular range.
With reference to the 4th kind of possible implementation of second aspect, in the 5th kind of possible implementation, the toe
Determining module includes：
Angular interval division module, for according to predetermined angle, the angular range to be divided into multiple angular intervals；
Number of times statistical module is hit, for according to the impingement position, counting the corresponding shock number of times of each angular interval,
Obtain hitting number of times two angular intervals of highest；
Toe determination sub-module, for by described two angular intervals, the maximum angular interval of angle value to be defined as institute
State the toe of grinding machine.
With reference to the 5th kind of possible implementation of second aspect, in the 6th kind of possible implementation, the angle
In the angular interval of interval division Module Division, partly overlapped between adjacent angular is interval.
In the 7th kind of possible implementation of second aspect, the working condition adjusting module, for being hit described
When hitting number of times higher than the preset times, reduction of speed processing is carried out to the grinding machine；In the shock number of times less than described default time
During number, speed-raising processing is carried out to the grinding machine.
The disclosure third aspect provides a kind of Mill Working state adjusting apparatus, and described device includes；
Processor；
Memory for storing processor-executable instruction；
Wherein, the processor is configured as：
The voice signal of grinding machine work is gathered, is extracted from the voice signal and grinds the shock data that medium hits liner plate
Frame；
According to the shock data frame, the impingement position that medium hits liner plate is ground described in positioning；
According to the impingement position, the toe of the grinding machine is determined；
Judge the shock number of times that the impingement position is located above the toe, if be consistent with preset times, if not
Symbol, then adjust the Mill Working state.
In disclosure scheme, voice signal during grinding machine work can be gathered, and extracted from voice signal and grind Jie
Matter hits shock data frame during liner plate, in this way, just can determine that each hits data frame corresponding according to auditory localization technology
Rum point position, and then the toe positions of grinding machine now are determined according to impingement position, so, it just can count and obtain above toe
Shock number of times, if the shock number of times above toe is not consistent with preset times, the working condition of grinding machine can be adjusted in time.
Such scheme, just can realize the timely adjustment of Mill Working state, can not only make the liner plate above toe try one's best it is few by
The direct shock of medium is ground, grinding machine is additionally aided and tries one's best holding optimum Working, the whole work efficiency of grinding machine is improved.
Other feature and advantage of the disclosure will be described in detail in subsequent embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing further understanding of the disclosure, and to constitute a part for specification, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute limitation of this disclosure.In the accompanying drawings：
Fig. 1 is in the schematic diagram for letting out state for grinding machine in disclosure scheme；
Fig. 2 is schematic diagram of the grinding machine in the state that leaves in disclosure scheme；
Fig. 3 is schematic diagram of the grinding machine in apocarpy in disclosure scheme；
Fig. 4 is the schematic flow sheet of disclosure scheme Mill Working state method of adjustment；
Fig. 5 is the front view of microphone array and grinding machine in disclosure scheme；
Fig. 6 is the right view of microphone array and grinding machine in disclosure scheme；
Fig. 7 is the schematic flow sheet of extraction shock data frame in disclosure scheme；
Fig. 8 is the schematic flow sheet of determination grinding machine toe in disclosure scheme；
Fig. 9 is the position view of grinding machine toe in disclosure scheme；
Figure 10 is the composition schematic diagram of disclosure scheme Mill Working state adjusting apparatus；
Figure 11 is the structural representation of disclosure scheme Mill Working state adjusting apparatus.
Embodiment
It is described in detail below in conjunction with accompanying drawing embodiment of this disclosure.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explained the disclosure, is not limited to the disclosure.
The technical scheme of embodiment of the present disclosure offer is provided for the ease of those skilled in the art, first makees following solution
Release explanation.
The cylinder inboard wall for being commonly used for mixed material and abrading-ball is provided with liner plate, when grinding machine is rotated, grind medium from
The effect of mental and physical efforts and frictional force, is attached on liner plate with barrel body rotation, downward by self gravitation effect after certain altitude is gone to
Leave.
In actual application, with mill speed from low to high, grind the motion state of medium can be divided into it is following
Three kinds：
(1) when grinding machine is at low speed, grinds medium presentation and let out state, for details, reference can be made to schematic diagram shown in Fig. 1.The shape
Under state, mainly by the crushing produced when medium is mutually slided and abrasive action is ground, crushing material is carried out.
(2) when grinding machine is operated with higher speed, grind medium presentation and leave state, for details, reference can be made to schematic diagram shown in Fig. 2.Should
Under state, crushing material is carried out mainly by impulsive force, grinding machine general work is in this state.
(3) when grinding machine more than critical limit to run at high speed, grind medium and apocarpy is presented, for details, reference can be made to Fig. 3
Shown schematic diagram.Under the state, grinding medium will not fall with barrel body rotation, will not generally produce abrasive action, therefore grinding machine should
Avoid working in this state as far as possible.
It should be noted that Fig. 1, Fig. 2, Fig. 3 are illustrated that mill feeding mouthful to discharging opening direction, the cross section of cylinder
Schematic diagram.
Generally, it can will grind medium inclined plane and the lower end line of cylinder boundary is referred to as grinding machine toe.When mill speed compared with
Gao Shi, (it is to be understood that toe arrives the region of grinding machine center line upwards) above toe may directly be hit by grinding medium
Liner plate, if this situation for directly hitting liner plate is excessive, can cause liner plate breakage failure rate to raise.When mill speed is relatively low
When, medium is ground in rushing down state, the liner plate above toe will not be directly hit, and is contributed under protection liner plate, but this state
The operating efficiency of grinding machine is relatively low.It therefore, it can, according to the motion state for grinding medium, analyze Mill Working state, and optionally
Adjustment mill speed, the whole work efficiency for improving grinding machine, and it is undermined to reduce liner plate institute as far as possible in time.
Referring to Fig. 4, the schematic flow sheet of disclosure Mill Working state method of adjustment is shown.Following step can be included
Suddenly：
S101, the voice signal of collection grinding machine work, extracts from the voice signal and grinds hitting for medium shock liner plate
Hit data frame.
Inventor has found in R＆D process, grinding machine different working condition, grind medium and hit cylinder diverse location when,
The sound of generation can be different, therefore disclosure scheme can gather the voice signal of grinding machine work, and is believed by analyzing sound
Number mode, specify the working condition of grinding machine, for adjustment working condition technical support is provided.
As a kind of example, the voice signal of grinding machine within a predetermined period of time can be gathered, for example, predetermined amount of time is
3min, that is, gather the voice signal of grinding machine work in 3min.Generally, practical application request can be combined and predetermined amount of time is set,
Disclosure scheme can be not specifically limited to this.
As a kind of example, the voice signal of predetermined number can be gathered, for example, predetermined number is 2,000,000 sampled points,
The data of one voice signal of each sampled point correspondence.Generally, practical application request can be combined and predetermined number, the disclosure is set
Scheme can be not specifically limited to this.
In view of the improvement complexity and improving cost of scheme, disclosure scheme can not be to existing grinding machine, life
Producing line carries out large-scale redevelopment.As a kind of example, it can be adopted by way of laying microphone array in grinding machine near-field region
Collect the voice signal of grinding machine work.Specifically, the spatial relation of microphone array and grinding machine, reference can be made to Mike shown in Fig. 5
The front view of wind array and grinding machine, and microphone array shown in Fig. 6 and grinding machine right view.
For the microphone array in disclosure scheme, description below explanation can be made：
1. the structure design of microphone array
(1) geometric configuration is arranged
Cylinder in view of grinding machine is usually cylindrical shape, and adjustment mill speed when Main Basiss grinding machine in vertical direction
On auditory localization result, therefore microphone array can be designed in arc structure in disclosure scheme.In addition, it is contemplated that sound is believed
Number detection zone be cylinder a part, can at least include：Toe upper area, toe region of variation, toe lower section are few
Perhaps region (including grinding machine belly), and hence it is also possible to reference to acquisition angles θ and cylinder radius R, by the collection of microphone array
Scope is set to L, so that the acquisition range of array can cover detection zone.It is to be appreciated that once selecting grinding material institute
Grinding machine, the detection zone of grinding machine just has determined that.
As a kind of example, acquisition angles θ value can be 50~90 °., can to as far as possible many collected sound signals
With by acquisition angles set it is bigger than normal, for example acquisition angles be 90 °；To reduction amount of calculation as far as possible, disclosure scheme is improved
Treatment effeciency, can set acquisition angles is less than normal, for example acquisition angles be 50 °.The value of acquisition angles can be tied
Close depending on practical application request, disclosure scheme can be not specifically limited to this.
(2) remote/near field is chosen
In actual application, there is stronger noise background, if the auditory localization of far field, Mike in grinding machine scene
Wind array acquisition to voice signal in can adulterate a large amount of ambient noises, have a strong impact on the accuracy of auditory localization.Using near field
If auditory localization, with the shortening of distance between microphone array and cylinder, the ring adulterated in voice signal is effectively reduced
Border noise, effectively improves the accuracy of auditory localization.This is directed to, disclosure scheme is positioned using near-field sound source, i.e. by Mike
Wind array is laid in the near-field region of grinding machine., can be rack-mount by microphone array as a kind of example, and by support
It is placed in the near-field region of grinding machine.
(3) spacing between array element spacing, i.e. neighboring microphones
When the voice signal worked by microphone array grinding machine carries out spatial sampling, the spacing between neighboring microphones
D is bigger, and wave beam bandwidth is narrower, and spatial resolution is stronger, but d value can not infinitely increase, and can be limited by signal wavelength
System, to avoid causing the spacial aliasing of voice signal.
d≤λmin/ 2 formula 2
It is to be appreciated that different grinds medium, to that should have respective frequency range, can therefrom selecting frequency it is maximum
Value, in conjunction with formula：The velocity of sound=wavelength * frequencies, obtains λmin, disclosure scheme is not detailed to this.
(4) the microphone number that array element number, i.e. microphone array include
In order to realize that the disclosure carries out the purpose of grinding machine work adjustment according to voice signal, microphone array can at least be wrapped
Include 3 microphones.Meanwhile, associative array acquisition range and array element spacing also know N=L/d.
2. the layout designs of microphone array
In order to improve the effect of disclosure scheme institute collected sound signal as far as possible, and based on voice signal adjustment work shape
The accuracy of state, can also make following layout designs to microphone array：
(1) vertical range of the array with respect to cylinder
Determine using after near-field sound source positioning, can also further the distance between clear and definite microphone array and cylinder rs。
Generally, the ambient noise that microphone array adulterates in grinding machine, institute's collected sound signal is smaller, and validity is higher, still,
Need to be used as transmission medium collected sound signal by air in view of microphone array, should be reserved between array and cylinder certain
Distance, when so can also avoid the array from being close to cylinder, because cylinder shakes the collection effect of the influence of noise voice signal produced.
It is to be appreciated that different grinds medium, to that should have respective frequency range, can therefrom selecting frequency it is minimum
Value, in conjunction with formula：The velocity of sound=wavelength * frequencies, obtains λmax, disclosure scheme is not detailed to this.
(2) horizontal range of the array with respect to cylinder
Generally, inside grinding machine from charging aperture to discharging opening helically shape, have one and grind medium and hit cylinder most
Impingement region is concentrated, in order that the collection effect of voice signal is optimal, microphone array spatially can be hit to should most concentrate
Hit region.Understood with reference to practical application, most concentrate impingement region to be located at body centre close to the position of charging aperture, with grinding machine radius
Exemplified by being 4.5m for 2.4m, grinding machine length, 0.5m is moved from body centre to charging aperture direction can be as most concentrating impingement region
Domain, if body centre is considered as 0m, horizontal range r of the array with respect to cylindervFor 0.5m.Ground it is to be appreciated that once selecting
Grinding machine used in grind materials, most concentrates impingement region just to have determined that.
(3) height of the array with respect to cylinder
Height in disclosure scheme, it can be understood as the position where the microphone of array the top, reference can be made in Fig. 6
A points, for the voice signal tried one's best in comprehensive acquisition testing region, it is to avoid because voice signal lose, particularly on toe
The voice signal of side is lost, and the situation of influence working condition adjustment accuracy occurs, and array heights can be made to be slightly above above toe
The upper limit in region, i.e. array the top can wrap toe upper area.Generally, the upper limit correspondence of toe upper area is ground
The center line of machine.
As a kind of example, in order to reduce the interference of backward noise as far as possible, microphone array can also be carried out at sound insulation
Reason, is got up array cladding using acoustic material, and ensure the side open design towards cylinder.For the sound insulation material used
Material, disclosure scheme can be not specifically limited, can be selected with reference to practical application request.
To sum up, according to said structure design and layout designs, the microphone array of disclosure scheme is just can obtain, is gathered
The voice signal of grinding machine work, for carrying out subsequent analysis.
Specifically, it can be extracted from voice signal and grind the shock data frame that medium hits liner plate.Referring to Fig. 7, show
The disclosure extracts the schematic flow sheet for hitting data frame.It may comprise steps of：
S201, sub-frame processing is carried out to the voice signal, obtains the amplitude maximum Max per frame, the amplitude per frame most
Small value Min, frequency domain energy and P per framefAnd the frequency domain energy average value P per framea。
S202, from all frames that the sub-frame processing is obtained, extracts the shock data frame, the shock data frame is expired
It is enough lower condition：
Amplitude maximum Max is not more than default negative sense threshold value and frequency not less than pre-set forward threshold value, amplitude minimum M in
Domain energy and PfNot less than preset energy threshold valueP0Headed by task state adjustment institute collected sound signal when
Domain energy and PtFor this working condition adjust institute collected sound signal time domain energy and.
In disclosure scheme, sound when grinding machine works potentially includes the sound in the sound of mill running, surrounding environment
Sound, the sound for grinding medium shock liner plate, etc..The shock number that medium hits liner plate is ground in order to be extracted from voice signal
According to frame, disclosure scheme can at least be made from the aspect of following two：
First aspect, it is contemplated that voice signal is defined steady-state signal, first can carry out sub-frame processing to voice signal, obtain many
Voice signal in individual data frame, each data frame can be considered as steady-state signal, carry out subsequent analysis processing.
As a kind of example, sub-frame processing can be carried out according to default sampled point number, for example, default sampled point number is
512, i.e., each data frame includes 512 sampled points.Generally, practical application request can be combined and default sampled point number is set,
Disclosure scheme can be not specifically limited to this.
As a kind of example, sub-frame processing can be carried out according to predetermined time period, for example, predetermined time period is
30ms, i.e., include all voice signals of collection in 30ms per frame.Generally, practical application request can be combined and preset time is set
Length, disclosure scheme can be not specifically limited to this.
Second aspect, cylinder, which rotates a circle, is considered as a service cycle, within a service cycle, grinds medium and hits lining
The sound produced during plate is maximum and most sharp, therefore voice signal can be transformed into time domain, analyzed and processed on frequency domain, identifies
Grind corresponding shock data frame when medium hits liner plate.
Specifically, it can calculate and obtain following parameter：The time domain energy of this working condition adjustment institute collected sound signal
And Pt, per frame amplitude maximum Max, per frame amplitude minimum M in, per frame frequency domain energy and Pf, per frame frequency domain energy
Average value Pa, disclosure scheme is not detailed to the calculation of parameter, specifically can refer to correlation technique realization.
Time-Frequency Analysis is carried out to each data frame, whether judge current data frame is to hit data frame.Specifically, hit
Data frame meets following condition simultaneously：
(1) in time domain, amplitude maximum Max be not less than pre-set forward threshold value, and amplitude minimum M in be not more than it is default
Negative sense threshold value；
(2) on frequency domain, frequency domain energy and PfNot less than preset energy threshold value P.
As a kind of example, pre-set forward threshold value is k*T1, it is k*T to preset negative sense threshold value2, preset energy threshold valueWherein, P0Headed by task state adjustment institute collected sound signal time domain energy and；T1Headed by task shape
The average value of all positive numbers in state adjustment institute collected sound signal；T2Headed by institute in task state adjustment institute collected sound signal
There is the average value of negative；K is regulation coefficient, can be according to practical application depending on, be used as a kind of example, k=3.5, disclosure side
Case can be not specifically limited to this.
Working condition adjustment first according to disclosure project setting it is to be understood that after grinding machine normal operation, grind for the first time
During machine working condition.When working condition is adjusted first, collect after voice signal, can directly be utilized without sub-frame processing
Voice signal obtains P0、T1、T2。
S102, according to the shock data frame, grinds the impingement position that medium hits liner plate described in positioning.
S103, according to the impingement position, determines the toe of the grinding machine.
Generally, two kinds of situations can be divided into by grinding medium shock liner plate：Indirect impingement liner plate, directly hit liner plate.Specifically
Ground, in actual application, in grinding machine toe and toe lower zone, has part and grinds medium with the rotation of cylinder,
Slided on liner plate, in this case, what is left grinds medium and can grind medium, indirect impingement across what is slided with liner plate
On liner plate；In grinding machine toe upper area, be generally not in grind medium with what liner plate was slided, in this case, thrown
The medium that grinds fallen is directly impinged upon on liner plate.
The impact events of liner plate above disclosure scheme Main Basiss toe, adjust Mill Working state.Therefore, extract
Hit after data frame, can first orient each and hit the corresponding impingement position of data frame, mill is identified further according to impingement position
Machine toe, and then statistics obtains the impact events above toe.
Specifically, auditory localization technology can be based on, the corresponding maximum sound source position of each shock data frame is determined, and
Maximum sound source position is transformed into 0~θ angular range, each is obtained and hits the corresponding impingement position of data frame.
Generally, the acquisition angles θ of microphone array can be set to 90 °, that is to say, that angular range is 0~90 °,
When microphone array is laid according to schematic diagram shown in Fig. 6, if coordinate system is set up based on cylinder cross section, in grinding machine
When being operated according to counter clockwise direction, it is 90 ° that X-axis, which bears semiaxis, and it is 0 ° that Y-axis, which bears semiaxis,.
Understood with reference to practical application, the toe of grinding machine, toe top are usually located in 0~50 ° of angular range, in order to the greatest extent
Amount reduces amount of calculation, and acquisition angles θ can also be set to 50 °, now, and it is 50 °, microphone array bottom that X-axis, which bears semiaxis,
Correspond to 0 ° (40 ° can corresponded in 0~90 ° of angular range).
As a kind of example, can by the algorithm based on energy, steerable beam formation algorithm, Power estimation algorithm, be based on
TDOA (English：Time Difference of Arrival, Chinese：Reaching time-difference)/TDE (English：Time Delay
Estimation, Chinese：Time delay estimadon) the auditory localization technology such as algorithm, it is determined that maximum sound source position, disclosure scheme pair
This can be not specifically limited.
Obtain and grind after the impingement position that medium hits liner plate, the toe of grinding machine now just can be determined according to impingement position
Position.Specifically, referring to Fig. 8, show that the disclosure determines the schematic flow sheet of grinding machine toe.It may comprise steps of：
S301, according to predetermined angle, multiple angular intervals are divided into by the angular range.
S302, according to the impingement position, counts the corresponding shock number of times of each angular interval, obtains hitting number of times highest
Two angular intervals.
S303, by described two angular intervals, the maximum angular interval of angle value is defined as the toe of the grinding machine.
In actual application, the impingement position for grinding medium is concentrated mainly on grinding machine toe, below toe
Grinding machine belly.Generally, the shock number of times of grinding machine belly is higher than grinding machine toe, but as rotating speed is improved, it is also possible to grind
The shock number of times of machine toe is higher than grinding machine belly, therefore, and disclosure scheme can first count two positions of shock number of times highest
Put, then in conjunction with toe and the position relationship of belly, wherein more top position is defined as grinding machine toe.
As a kind of example, the predetermined angle for dividing angular interval can be 3~5 °, and disclosure scheme can not to this
Limit, specifically can be with reference to depending on practical application request.
So that angular range is 0~50 °, predetermined angle is 5 ° as an example, can count obtain 0~4 °, 5~9 ° ..., 45~
The corresponding shock number of times of 49 ° of these angular intervals, if it is 5~9 °, 10~14 ° to hit two angular intervals of number of times highest,
It is located in view of belly below toe, therefore 10~14 ° maximum of angular interval of angle value can be defined as to the toe of grinding machine, specifically
Reference can be made to schematic diagram shown in Fig. 9.
As a kind of example, in order that the toe positions determined are more accurate, there may be portion between adjacent angular is interval
Divide overlapping.For example, when predetermined angle is 5 °, can be divided into 0~4 °, 3~7 °, 6~10 ° it is angularly interval.
S104, judges the shock number of times that the impingement position is located above the toe, if be consistent with preset times, such as
Fruit is not inconsistent, then adjusts the Mill Working state.
From introduction made above, as mill speed changes from low to high, the feelings of liner plate above toe are directly hit
Condition can be more and more, therefore, the working condition of grinding machine can be determined according to the shock number of times above toe, so when needed and
When be operated state adjustment.
Specifically, it is determined that going out after grinding machine toe, it just can count and obtain corresponding shock number of times above toe, that is,
Say, shock number of times of the corresponding angle value of impingement position higher than the maximal angle value of toe can be counted.It is shown in Figure 9 to show
Example, 15~50 ° belong to above toe, can count and obtain the corresponding shock number of times in the region, the working condition for determining grinding machine.
Specifically, disclosure scheme can be by under grinding machine rated speed, the shock number of times conduct above the toe counted
Preset times, compared with the shock number of times that this working condition adjusts above the toe that statistics is obtained.If above toe
Hit number of times and be higher than preset times, then illustrate that mill speed is higher, reduction of speed processing can be carried out to grinding machine；If hitting above toe
Number of times is hit less than preset times, then illustrates that mill speed is relatively low, speed-raising processing can be carried out to grinding machine.In this way, grinding machine just can be realized
The timely adjustment of working condition, can not only make the liner plate above toe try one's best few by the direct shock for grinding medium, also
Contribute to grinding machine to try one's best holding optimum Working, improve the whole work efficiency of grinding machine.
As a kind of example, above-mentioned preset times can be a specific numerical value, or an or numerical value area
Between, disclosure scheme can be not specifically limited to this.
Referring to Figure 10, the composition schematic diagram of disclosure Mill Working state adjusting apparatus is shown.Described device can be wrapped
Include：
Sound signal collecting module 401, the voice signal for gathering grinding machine work；
Data frame extraction module 402, the shock data that medium hits liner plate are ground for being extracted from the voice signal
Frame；
Impingement position locating module 403, for according to the shock data frame, positioning is described to grind medium shock liner plate
Impingement position；
Toe determining module 404, the toe for determining the grinding machine according to the impingement position；
Working condition adjusting module 405, for judging the shock number of times that the impingement position is located above the toe, be
It is no to be consistent with preset times, if be not inconsistent, adjust the Mill Working state.
Alternatively, the sound signal collecting module, for the microphone array by being laid in the grinding machine near-field region
Row, gather the voice signal；
Wherein, the microphone array is in arc structure, and the cylinder arc of the radian of the arc structure and the grinding machine
Degree matches, and the microphone array includes N number of microphone laid according to spacing d, N=L/d and N >=3, d≤λmin/ 2, λmin
For the minimum wavelength of the voice signal, L is the acquisition range of the microphone array,R is the cylinder
The radius of body, θ is the acquisition angles of the microphone array, and θ value is 50~90 °.
In disclosure scheme, sound signal collecting module can be presented as the microphone array for collected sound signal；
Or, the interface with microphone array column interaction can be presented as, the voice signal for receiving microphone array collection, the disclosure
Scheme can be not specifically limited to this.
Alternatively, the microphone array spatially corresponds to the most concentration impingement region of the grinding machine, and the wheat
The top of gram wind array covers the detection zone above the toe, the distance between the microphone array and described cylinder
For rs, 0<rs≤2L2/λmax, λmaxFor the maximum wavelength of the voice signal.
Alternatively, the data frame extraction module includes：
Sub-frame processing module, for the voice signal carry out sub-frame processing, obtain per frame amplitude maximum Max,
Amplitude minimum M in per frame, frequency domain energy and P per framefAnd the frequency domain energy average value P per framea；
Data frame extracting sub-module, for from all frames that the sub-frame processing is obtained, extracting the shock data frame,
The shock data frame meets following condition：
Amplitude maximum Max is not more than default negative sense threshold value and frequency not less than pre-set forward threshold value, amplitude minimum M in
Domain energy and PfNot less than preset energy threshold valueP0Headed by task state adjustment institute collected sound signal when
Domain energy and PtFor this working condition adjust institute collected sound signal time domain energy and.
Alternatively, if the sound signal collecting module is used for the microphone by being laid in the grinding machine near-field region
Array, gathers the voice signal, then the impingement position locating module, for utilizing auditory localization technology, orients each
The corresponding maximum sound source position of data frame is hit, and is transformed into 0~θ angular range, the impingement position is used as；
Wherein, 0 in the bottom correspondence angular range of the microphone array, the microphone array it is most upper
θ in side's correspondence angular range.
Alternatively, the toe determining module includes：
Angular interval division module, for according to predetermined angle, the angular range to be divided into multiple angular intervals；
Number of times statistical module is hit, for according to the impingement position, counting the corresponding shock number of times of each angular interval,
Obtain hitting number of times two angular intervals of highest；
Toe determination sub-module, for by described two angular intervals, the maximum angular interval of angle value to be defined as institute
State the toe of grinding machine.
Alternatively, in the angular interval that the angular interval division module is divided, partly overlapped between adjacent angular is interval.
Alternatively, the working condition adjusting module, for when the shock number of times is higher than the preset times, to institute
State grinding machine and carry out reduction of speed processing；When the shock number of times is less than the preset times, speed-raising processing is carried out to the grinding machine.
On the device in above-described embodiment, wherein modules perform the concrete mode of operation in relevant this method
Embodiment in be described in detail, explanation will be not set forth in detail herein.
Referring to the structural representation that Figure 11 is disclosure Mill Working state adjusting apparatus 500.For example, device 500 can be with
It is provided as a server.Reference picture 11, device 500 includes processing assembly 501, and it further comprises one or more processing
Device, and as the memory resource representated by memory 502, for store can by the execution of processing assembly 501 instruction, for example
Application program.The application program stored in memory 502 can include it is one or more each refer to corresponding to one group
The module of order.In addition, processing assembly 501 is configured as execute instruction, to perform above-mentioned Mill Working state method of adjustment.
Device 500 can also include the power management that a power supply module 503 is configured as performs device 500, and one has
Line or radio network interface 504 are configured as device 500 being connected to network, and input and output (I/O) interface 505.Dress
Putting 500 can operate based on the operating system for being stored in memory 502, such as Windows ServerTM, Mac OS XTM,
UnixTM, LinuxTM, FreeBSDTM or similar.
The preferred embodiment of the disclosure is described in detail above in association with accompanying drawing, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out with technical scheme of this disclosure
Monotropic type, these simple variants belong to the protection domain of the disclosure.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the disclosure to it is various can
The combination of energy no longer separately illustrates.
In addition, can also be combined between a variety of embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought, it should equally be considered as disclosure disclosure of that.
Claims (15)
1. a kind of Mill Working state method of adjustment, it is characterised in that methods described includes：
The voice signal of grinding machine work is gathered, is extracted from the voice signal and grinds the shock data frame that medium hits liner plate；
According to the shock data frame, the impingement position that medium hits liner plate is ground described in positioning；
According to the impingement position, the toe of the grinding machine is determined；
Judge the shock number of times that the impingement position is located above the toe, if be consistent with preset times, if be not inconsistent,
Adjust the Mill Working state.
2. according to the method described in claim 1, it is characterised in that the voice signal of the collection grinding machine work, including：
By being laid in the microphone array of the grinding machine near-field region, the voice signal is gathered；
Wherein, the microphone array is in arc structure, and the cylinder radian phase of the radian of the arc structure and the grinding machine
Matching, the microphone array includes N number of microphone laid according to spacing d, N=L/d and N >=3, d≤λmin/ 2, λminFor institute
The minimum wavelength of voice signal is stated, L is the acquisition range of the microphone array,R is the cylinder
Radius, θ is the acquisition angles of the microphone array, and θ value is 50~90 °.
3. method according to claim 2, it is characterised in that
The microphone array spatially corresponds to the most concentration impingement region of the grinding machine, and the microphone array is most
Top covers the detection zone above the toe, and the distance between the microphone array and the cylinder are rs, 0<rs≤
2L2/λmax, λmaxFor the maximum wavelength of the voice signal.
4. according to the method described in claim 1, it is characterised in that described extracted from the voice signal grinds medium shock
The shock data frame of liner plate, including：
Sub-frame processing is carried out to the voice signal, the amplitude maximum Max per frame is obtained, the amplitude minimum M in per frame, every
The frequency domain energy and P of framefAnd the frequency domain energy average value P per framea；
From all frames that the sub-frame processing is obtained, the shock data frame is extracted, the shock data frame meets following bar
Part：
Amplitude maximum Max is not more than default negative sense threshold value and frequency domain energy not less than pre-set forward threshold value, amplitude minimum M in
Amount and PfNot less than preset energy threshold valueP0Headed by task state adjustment institute collected sound signal time domain energy
Amount and PtFor this working condition adjust institute collected sound signal time domain energy and.
5. according to the method described in claim 1, it is characterised in that if the Mike by being laid in the grinding machine near-field region
Wind array, gathers the voice signal, then described according to the shock data frame, and positioning is described to grind hitting for medium shock liner plate
Position is hit, including：
Using auditory localization technology, the corresponding maximum sound source position of each shock data frame is oriented, and be transformed into 0~θ angle
Spend in scope, be used as the impingement position；
Wherein, 0 in the bottom correspondence angular range of the microphone array, the top pair of the microphone array
Answer the θ in the angular range.
6. method according to claim 5, it is characterised in that the toe of the determination grinding machine, including：
According to predetermined angle, the angular range is divided into multiple angular intervals；
According to the impingement position, the corresponding shock number of times of each angular interval is counted, obtains hitting two angles of number of times highest
Degree is interval；
By in described two angular intervals, the maximum angular interval of angle value is defined as the toe of the grinding machine.
7. according to the method described in claim 1, it is characterised in that the adjustment Mill Working state, including：
If the shock number of times is higher than the preset times, reduction of speed processing is carried out to the grinding machine；
If the shock number of times is less than the preset times, speed-raising processing is carried out to the grinding machine.
8. a kind of Mill Working state adjusting apparatus, it is characterised in that described device includes；
Sound signal collecting module, the voice signal for gathering grinding machine work；
Data frame extraction module, the shock data frame that medium hits liner plate is ground for being extracted from the voice signal；
Impingement position locating module, grinds the shock that medium hits liner plate for according to the shock data frame, positioning to be described
Put；
Toe determining module, for according to the impingement position, determining the toe of the grinding machine；
Working condition adjusting module, for judge the impingement position be located at the toe above shock number of times, if with it is pre-
If number of times is consistent, if be not inconsistent, the Mill Working state is adjusted.
9. device according to claim 8, it is characterised in that
The sound signal collecting module, for the microphone array by being laid in the grinding machine near-field region, collection is described
Voice signal；
Wherein, the microphone array is in arc structure, and the cylinder radian phase of the radian of the arc structure and the grinding machine
Matching, the microphone array includes N number of microphone laid according to spacing d, N=L/d and N >=3, d≤λmin/ 2, λminFor institute
The minimum wavelength of voice signal is stated, L is the acquisition range of the microphone array,R is the cylinder
Radius, θ is the acquisition angles of the microphone array, and θ value is 50~90 °.
10. device according to claim 9, it is characterised in that
The microphone array spatially corresponds to the most concentration impingement region of the grinding machine, and the microphone array is most
Top covers the detection zone above the toe, and the distance between the microphone array and the cylinder are rs, 0<rs≤
2L2/λmax, λmaxFor the maximum wavelength of the voice signal.
11. device according to claim 8, it is characterised in that the data frame extraction module includes：
Sub-frame processing module, for carrying out sub-frame processing to the voice signal, obtains amplitude maximum Max, the every frame per frame
Amplitude minimum M in, per frame frequency domain energy and PfAnd the frequency domain energy average value P per framea；
Data frame extracting sub-module, it is described for from all frames that the sub-frame processing is obtained, extracting the shock data frame
Hit data frame and meet following condition：
Amplitude maximum Max is not more than default negative sense threshold value and frequency domain energy not less than pre-set forward threshold value, amplitude minimum M in
Amount and PfNot less than preset energy threshold valueP0Headed by task state adjustment institute collected sound signal time domain energy
Amount and PtFor this working condition adjust institute collected sound signal time domain energy and.
12. device according to claim 8, it is characterised in that if the sound signal collecting module is by being laid in
The microphone array of the grinding machine near-field region, gathers the voice signal, then
The impingement position locating module, for utilizing auditory localization technology, orients the corresponding maximum of each shock data frame
Sound source position, and be transformed into 0~θ angular range, it is used as the impingement position；
Wherein, 0 in the bottom correspondence angular range of the microphone array, the top pair of the microphone array
Answer the θ in the angular range.
13. device according to claim 12, it is characterised in that the toe determining module includes：
Angular interval division module, for according to predetermined angle, the angular range to be divided into multiple angular intervals；
Number of times statistical module is hit, for according to the impingement position, counting the corresponding shock number of times of each angular interval, is obtained
Hit number of times two angular intervals of highest；
Toe determination sub-module, for by described two angular intervals, the maximum angular interval of angle value to be defined as the mill
The toe of machine.
14. device according to claim 8, it is characterised in that
The working condition adjusting module, for when the shock number of times is higher than the preset times, being carried out to the grinding machine
Reduction of speed processing；When the shock number of times is less than the preset times, speed-raising processing is carried out to the grinding machine.
15. a kind of Mill Working state adjusting apparatus, it is characterised in that described device includes；
Processor；
Memory for storing processor-executable instruction；
Wherein, the processor is configured as：
The voice signal of grinding machine work is gathered, is extracted from the voice signal and grinds the shock data frame that medium hits liner plate；
According to the shock data frame, the impingement position that medium hits liner plate is ground described in positioning；
According to the impingement position, the toe of the grinding machine is determined；
Judge the shock number of times that the impingement position is located above the toe, if be consistent with preset times, if be not inconsistent,
Adjust the Mill Working state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710379281.XA CN107159435B (en) | 2017-05-25 | 2017-05-25 | Method and device for adjusting working state of mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710379281.XA CN107159435B (en) | 2017-05-25 | 2017-05-25 | Method and device for adjusting working state of mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107159435A true CN107159435A (en) | 2017-09-15 |
| CN107159435B CN107159435B (en) | 2019-07-09 |
Family
ID=59820760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710379281.XA Active CN107159435B (en) | 2017-05-25 | 2017-05-25 | Method and device for adjusting working state of mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107159435B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108538306A (en) * | 2017-12-29 | 2018-09-14 | 北京声智科技有限公司 | Improve the method and device of speech ciphering equipment DOA estimations |
| CN110987402A (en) * | 2019-12-20 | 2020-04-10 | 中国科学技术大学 | Ball mill working state detection method based on sound energy |
| CN112393698A (en) * | 2019-08-16 | 2021-02-23 | 中国航发商用航空发动机有限责任公司 | Oil plug detection method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3211929A1 (en) * | 2021-04-09 | 2022-10-13 | S.P.M. Instrument Ab | Method and system for operating a comminution process in a ball mill |
| SE2350419A1 (en) * | 2022-04-11 | 2023-10-12 | Spm Instr Ab | A Mill Process System |
| SE2350420A1 (en) * | 2022-04-11 | 2023-10-12 | Spm Instr Ab | A Mill Process System |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB475421A (en) * | 1936-05-18 | 1937-11-18 | Carl Frederik Love Roder | Improvements relating to the automatic control of grinding and crushing mills |
| DE19933995A1 (en) * | 1999-07-20 | 2001-03-01 | Kima Ges Fuer Echtzeitsysteme | Measurement of the level of filling of a ball mill with aggregate by use of microphones attached directly to the wall of the mill to improve sound transmission from the mill interior and improve accuracy of level determination |
| CN100363111C (en) * | 2003-01-17 | 2008-01-23 | 奥托昆普技术公司 | Method for defining the degree of fullness in a mill |
| CN102744141A (en) * | 2011-04-20 | 2012-10-24 | 山东理工大学 | System and method for detecting motion state of ball mill |
| CN102854494A (en) * | 2012-08-08 | 2013-01-02 | Tcl集团股份有限公司 | Sound source locating method and device |
| CN202735105U (en) * | 2012-07-03 | 2013-02-13 | 上海电机学院 | Fault detecting device |
| CN103076593A (en) * | 2012-12-28 | 2013-05-01 | 中国科学院声学研究所 | Sound source localization method and device |
| CN106125048A (en) * | 2016-07-11 | 2016-11-16 | 浙江大华技术股份有限公司 | A kind of sound localization method and device |
-
2017
- 2017-05-25 CN CN201710379281.XA patent/CN107159435B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB475421A (en) * | 1936-05-18 | 1937-11-18 | Carl Frederik Love Roder | Improvements relating to the automatic control of grinding and crushing mills |
| DE19933995A1 (en) * | 1999-07-20 | 2001-03-01 | Kima Ges Fuer Echtzeitsysteme | Measurement of the level of filling of a ball mill with aggregate by use of microphones attached directly to the wall of the mill to improve sound transmission from the mill interior and improve accuracy of level determination |
| CN100363111C (en) * | 2003-01-17 | 2008-01-23 | 奥托昆普技术公司 | Method for defining the degree of fullness in a mill |
| CN102744141A (en) * | 2011-04-20 | 2012-10-24 | 山东理工大学 | System and method for detecting motion state of ball mill |
| CN202735105U (en) * | 2012-07-03 | 2013-02-13 | 上海电机学院 | Fault detecting device |
| CN102854494A (en) * | 2012-08-08 | 2013-01-02 | Tcl集团股份有限公司 | Sound source locating method and device |
| CN103076593A (en) * | 2012-12-28 | 2013-05-01 | 中国科学院声学研究所 | Sound source localization method and device |
| CN106125048A (en) * | 2016-07-11 | 2016-11-16 | 浙江大华技术股份有限公司 | A kind of sound localization method and device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108538306A (en) * | 2017-12-29 | 2018-09-14 | 北京声智科技有限公司 | Improve the method and device of speech ciphering equipment DOA estimations |
| CN108538306B (en) * | 2017-12-29 | 2020-05-26 | 北京声智科技有限公司 | Method and device for improving DOA estimation of voice equipment |
| CN112393698A (en) * | 2019-08-16 | 2021-02-23 | 中国航发商用航空发动机有限责任公司 | Oil plug detection method |
| CN112393698B (en) * | 2019-08-16 | 2022-04-12 | 中国航发商用航空发动机有限责任公司 | Oil plug detection method |
| CN110987402A (en) * | 2019-12-20 | 2020-04-10 | 中国科学技术大学 | Ball mill working state detection method based on sound energy |
| CN110987402B (en) * | 2019-12-20 | 2022-01-11 | 中国科学技术大学 | Ball mill working state detection method based on sound energy |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107159435B (en) | 2019-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107159435B (en) | Method and device for adjusting working state of mill | |
| EP3088057B1 (en) | Image processing device and image processing method | |
| CN102113701B (en) | Squirrel cage-type tobacco stalk sieving machine | |
| CN106506554A (en) | The method of live coding, device, terminal, linkage encoder server and system | |
| US9770639B2 (en) | System and method for monitoring performance characteristics associated with user activities involving swinging instruments | |
| CN103731642A (en) | High speed all-dimensional tracking monitoring device | |
| CN207065681U (en) | Range hood and its air intake coil component, impeller assembly and blower fan apparatus | |
| US9132331B2 (en) | Microphone array and method of use | |
| CN103716724B (en) | Sound collection method and electronic device | |
| KR20190063499A (en) | Wind collection apparatus for wind turbine generator | |
| CN104162470B (en) | A kind of flour mill with back powder device | |
| CN110987402B (en) | Ball mill working state detection method based on sound energy | |
| CN105007595A (en) | System and method for determining GSM Refarming buffer zone | |
| CN205701396U (en) | The screening device of cement mill steel ball steel forging | |
| CN107238506A (en) | The method that ball mill equipment working condition is detected is realized by auditory localization | |
| CN206462830U (en) | A kind of soy bean milk making machine of efficient pulverizing | |
| CN106330355A (en) | Flat-plate-type integrated radio monitoring and direction finding device | |
| CN106492915A (en) | A kind of wheat blanking device | |
| CN107479771B (en) | Control method, terminal and storage medium | |
| CN103596187B (en) | A kind of adjacent area determines that method, MPS process topology determine method and device | |
| CN113128273B (en) | Method and related device for detecting wearing of safety helmet | |
| CN105791668A (en) | Automatic focusing device | |
| CN104380932B (en) | Multifunctional split-type dry and wet threshing and cleaning elutriating apparatus | |
| CN207115604U (en) | A kind of game machine moves back coin motor swing control system | |
| JPWO2019202670A1 (en) | Gesture recognition method and gesture recognition device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220507 Address after: 450045 building 4, Henan information security industry demonstration park, No. 115, Baorui Road, Jinshui District, Zhengzhou City, Henan Province Patentee after: Henan Xunfei Artificial Intelligence Technology Co.,Ltd. Address before: 471000 Building 1, science and Technology Park, Luoyang National University, No. 1, Longyu Road, Jianxi District, Luoyang City, Henan Province Patentee before: LUOYANG VOICE CLOUD INNOVATION INSTITUTE |