CN103439991B - A kind of method and apparatus regulating rock feeder frequency of vibration in grinding process - Google Patents
A kind of method and apparatus regulating rock feeder frequency of vibration in grinding process Download PDFInfo
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- CN103439991B CN103439991B CN201310381176.1A CN201310381176A CN103439991B CN 103439991 B CN103439991 B CN 103439991B CN 201310381176 A CN201310381176 A CN 201310381176A CN 103439991 B CN103439991 B CN 103439991B
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Abstract
The embodiment of the present application discloses the method and apparatus regulating rock feeder frequency of vibration in a kind of grinding process, and described method includes: according to the actual discharge quantity being previously detected and preserving, calculate the deviation ratio of current discharge quantity deviation control discharge quantity; Numerical range belonging to described deviation ratio, it is determined that the present confinement cycle that described deviation ratio is corresponding; Judge whether the elapsed time in moment of the last current vibration frequency regulating described rock feeder of described current time distance reaches the described present confinement cycle more than, if it is utilize described deviation ratio that described current vibration frequency is adjusted, if otherwise refusing at current time, described current vibration frequency to be adjusted. By the technical scheme of the embodiment of the present application, the excessive adjustment to current vibration frequency can be avoided, the actual discharge quantity avoiding ore grinding storehouse is excessively regulated and deviation control discharge quantity, thus realizing ore grinding storehouse discharge quantity is accurately controlled, indirectly realizes the accurate control of ore milling product granularity.
Description
Technical field
The application relates to ore smelting field, particularly relates to the method and apparatus regulating rock feeder frequency of vibration in a kind of grinding process.
Background technology
In the production process of ore smelting, owing to digging up mine, the raw ore Ore obtained does not reach smelting requirements, it is necessary to first raw ore Ore being carried out ore dressing, thus obtaining meeting the concentrate of smelting requirements, being used further to smelting process. Ore-dressing practice mainly include to the crushing and screening of raw ore Ore, grind grading, sort, the link such as essence mine dehydration. Wherein, grinding process is to suitable granularity by the ore grinding of broken mistake, and the mineral pulverized are supplied to the process of sorting. In grinding process, owing to Ore is crushed, effective mineralogical composition can dissociate out from stone-like pulse, and different effective mineralogical composition is dissociated mutually.
Grinding operation is to provide the critical process sorting raw material, the control situation to grinding process, will directly influence the granularity of ore milling product, and then impact sorts the quality of process and dressing product. Owing to various mineral aggregates have different optimum granularity under various different mineral processing circuits, therefore, for given mineral aggregate and mineral processing circuit, it is necessary to ensure that the particle size stable of ore milling product is in the optimum granularity of this given mineral aggregate and mineral processing circuit.
Under the grinding condition set, product granularity entirety can change along with the discharge quantity of grinding process, therefore, in order to enable the granularity of ore milling product stably in the optimum granularity of this grinding condition, it is necessary to the discharge quantity controlling grinding process is stable on the control discharge quantity that this optimum granularity is corresponding.Referring to Fig. 1, it is shown that the equipment relating to blanking of a kind of grinding process is constituted, and the mineral aggregate crushed is stored in each ore grinding storehouse, by the vibrofeeder (M of each ore grinding bin discharge port external1～M6) control be thrown on the conveyer belt of conveyer, in order to mineral aggregate is delivered in ore mill and carries out ore grinding by conveyer belt, and wherein, vibrofeeder controls ore grinding storehouse discharge quantity according to frequency of vibration. In order to the discharge quantity keeping ore grinding storehouse is stable in optimum granularity, in prior art, the frequency of vibration of vibrofeeder is to regulate in real time according to the actual discharge quantity (WI) that ore grinding storehouse is current in real time.
But in actual grinding process, owing to Ore is through crushing the mineral aggregate diameter being subsequently formed between 0～300 millimeter, the granular size of mineral aggregate is also uneven, and bulk mineral aggregate throws in that speed is slow and fritter mineral aggregate to throw in speed fast, so, after the frequency of vibration of vibrofeeder is conditioned, the actual discharge quantity in ore grinding storehouse needs just can be adjusted putting in place through the regular hour, reaches to regulate the discharge quantity that after vibration frequency is corresponding. Now, after being conditioned due to frequency of vibration, the actual discharge quantity of rock feeder is not adjusted in place immediately, in prior art, frequency of vibration may proceed to regulate frequency of vibration according to current actual discharge quantity in real time, so that the actual discharge quantity in ore grinding storehouse is excessively regulated and deviation control discharge quantity, ore grinding storehouse discharge quantity is caused to control inaccurate and indirectly cause ore milling product Task-size Controlling inaccurate.
Summary of the invention
The embodiment of the present application is to be solved be technical problem is that, the method and apparatus regulating rock feeder frequency of vibration in a kind of grinding process is provided, controls inaccurate with the ore grinding storehouse discharge quantity solving to cause according to regulating the frequency of vibration of vibrofeeder according to the current actual discharge quantity in ore grinding storehouse in real time in prior art and indirectly cause the inaccurate technical problem of ore milling product Task-size Controlling.
For solving above-mentioned technical problem, first aspect, the embodiment of the present application provides a kind of method regulating rock feeder frequency of vibration in grinding process, and the method includes:
According to the actual discharge quantity being previously detected and preserving, calculate the deviation ratio of current discharge quantity deviation control discharge quantity;
Numerical range belonging to described deviation ratio, it is determined that the present confinement cycle that described deviation ratio is corresponding;
Judge whether the elapsed time in moment of the last current vibration frequency regulating described rock feeder of described current time distance reaches the described present confinement cycle more than;
If it is, utilize described deviation ratio that described current vibration frequency is adjusted;
If it is not, then described current vibration frequency is adjusted by refusal at current time.
In the first possible embodiment of first aspect, the numerical range belonging to described deviation ratio is more big, and the determined described present confinement cycle is more long.
In the embodiment that the second of first aspect is possible, described utilize described deviation ratio that described current vibration frequency is adjusted, including:
According to the numerical range belonging to described deviation ratio, it is determined that the adjustment factor to described current vibration frequency;
Using the product between described adjustment factor and described deviation ratio, described current vibration frequency as the regulated value of described current vibration frequency, described current vibration frequency is adjusted, obtains current vibration frequency to recalculate.
In the third possible embodiment of first aspect, in conjunction with the embodiment that the second of first aspect is possible, described numerical range belonging to described deviation ratio, it is determined that the adjustment factor to described current control discharge quantity, including:
Determine the numerical range belonging to described deviation ratio;
If described deviation ratio belongs to the first proportion, it is determined that described adjustment factor is the product of the first predetermined coefficient and symbol coefficient;
If described deviation ratio belongs to the second proportion, it is determined that described adjustment factor is the product of the second predetermined coefficient and symbol coefficient;
If described deviation ratio belongs to the 3rd proportion, it is determined that described adjustment factor is the product of the 3rd predetermined coefficient and symbol coefficient;
If described deviation ratio belongs to the 4th proportion, it is determined that described adjustment factor is the product of the 4th predetermined coefficient and symbol coefficient;
If described deviation ratio belongs to the 5th proportion, it is determined that described adjustment factor is 0;
Wherein, described first proportion to described 5th proportion is sequentially reduced, and described first predetermined coefficient to described 4th predetermined coefficient is sequentially reduced and is all higher than 0, and described symbol coefficient is calculated by following formula:
Wherein, c is symbol coefficient, and WI is for currently revising discharge quantity, and WI0 is for controlling discharge quantity.
In the 4th kind of possible embodiment of first aspect, the actual discharge quantity that described basis is previously detected and preserves, calculate the deviation ratio of described current discharge quantity deviation control discharge quantity, including:
Detect described ore grinding storehouse at the actual discharge quantity of current time and to preserve;
Each the actual discharge quantity preserved in the nearest correction cycle is weighted on average, calculates described current correction discharge quantity; A described nearest correction cycle for end time and adopts the time span preset with described current time;
Using described current correction discharge quantity as described current discharge quantity, calculate described current discharge quantity and deviate the deviation ratio of described control discharge quantity.
In the 5th kind of possible embodiment of first aspect, in conjunction with the 4th kind of possible embodiment of first aspect, the described actual discharge quantity to preserving in the nearest correction cycle is weighted on average, calculates described current correction discharge quantity, including:
At least two initial time is chosen, using the time period respectively and between described current time of the initial time each described as revising subcycle from each moment in the described correction cycle;
Calculate the meansigma methods of each actual discharge quantity in each described correction subcycle, as the average discharge quantity of correction subcycle each described;
By the product addition of the average discharge quantity of each described correction subcycle Yu the weight coefficient of described correction subcycle, obtain described current correction discharge quantity;
Wherein, each described weight coefficient sum is 1.
In the 6th kind of possible embodiment of first aspect, in conjunction with the 5th kind of possible embodiment of first aspect, described initial time includes the start time in described correction cycle, center time point and end time.
At the 7th kind of possible embodiment of first aspect, in conjunction with the 5th kind of possible embodiment of first aspect, the weight coefficient revising subcycle that initial time is closer to described current time is more little.
Second aspect, the embodiment of the present application provides the device regulating rock feeder frequency of vibration in a kind of grinding process, it is characterised in that including:
Deviation computing module, for according to the actual discharge quantity being previously detected and preserving, calculating current discharge quantity and deviate the deviation ratio of described control discharge quantity;
Constraint cycle module, for numerical range belonging to described deviation ratio, it is determined that the present confinement cycle that described deviation ratio is corresponding;
Constraint judge module, for judging whether the elapsed time in moment that described current time changes apart from the current vibration frequency of last described rock feeder reaches the described present confinement cycle more than;
Bias adjustment module, for when described constraint judges the judged result of submodule for being, utilizing described deviation ratio that described current vibration frequency is adjusted;
Refusal adjustment module, the judged result for judging submodule in described constraint is no, described current vibration frequency is adjusted by refusal at current time.
In the first possible embodiment of second aspect, the numerical range belonging to described deviation ratio is more big, and the determined described present confinement cycle is more long.
In the embodiment that the second of second aspect is possible, described bias adjustment module includes:
Coefficient determines submodule, for the numerical range belonging to described deviation ratio, it is determined that the adjustment factor to described current vibration frequency;
Regulating calculation submodule, for the regulated value using the product between described adjustment factor and described deviation ratio, described current vibration frequency as described current vibration frequency, is adjusted described current vibration frequency, obtains current vibration frequency to recalculate.
In the third possible embodiment of second aspect, in conjunction with the embodiment that the second of second aspect is possible, described coefficient determines that submodule includes:
Range determination submodule, for determining the numerical range belonging to described deviation ratio;
First scope submodule, for when described deviation ratio belongs to the first proportion, it is determined that described adjustment factor is the product of the first predetermined coefficient and symbol coefficient;
Second scope submodule, for when described deviation ratio belongs to the second proportion, it is determined that described adjustment factor is the product of the second predetermined coefficient and symbol coefficient;
3rd scope submodule, for when described deviation ratio belongs to three proportions, it is determined that described adjustment factor is the product of the 3rd predetermined coefficient and symbol coefficient;
4th scope submodule, for when described deviation ratio belongs to four proportions, it is determined that described adjustment factor is the product of the 4th predetermined coefficient and symbol coefficient;
5th scope submodule, for when described deviation ratio belongs to five proportions, it is determined that described adjustment factor is 0;
Wherein, described first proportion to described 5th proportion is sequentially reduced, and described first predetermined coefficient to described 4th predetermined coefficient is sequentially reduced and is all higher than 0, and described symbol coefficient is calculated by following formula:
Wherein, c is symbol coefficient, and WI is for currently revising discharge quantity, and WI0 is for controlling discharge quantity.
In the 4th kind of possible embodiment of second aspect, described deviation computing module includes:
Detection sub-module, and preserves at the actual discharge quantity of current time for detecting described ore grinding storehouse;
Revise submodule, for being weighted on average to each the actual discharge quantity preserved in the nearest correction cycle, calculate described current correction discharge quantity; A described nearest correction cycle for end time and adopts the time span preset with described current time;
Calculating sub module, for using described current correction discharge quantity as described current discharge quantity, calculating described current discharge quantity and deviate the deviation ratio of described control discharge quantity.
In the 5th kind of possible embodiment of second aspect, in conjunction with the 4th kind of possible embodiment of second aspect, described correction submodule includes:
Choose submodule, for choosing at least two initial time from each moment in the described correction cycle, using the time period respectively and between described current time of the initial time each described as revising subcycle;
Average submodule, for calculating the meansigma methods of each actual discharge quantity in each described correction subcycle, as the average discharge quantity of correction subcycle each described;
Weighting submodule, for the product addition by the average discharge quantity of each described correction subcycle with the weight coefficient of described correction subcycle, obtains described current correction discharge quantity;
Wherein, each described weight coefficient sum is 1.
In the 6th kind of possible embodiment of second aspect, in conjunction with the 5th kind of possible embodiment of second aspect, described initial time includes the start time in described correction cycle, center time point and end time.
At the 7th kind of possible embodiment of second aspect, in conjunction with the 5th kind of possible embodiment of second aspect, the weight coefficient revising subcycle that initial time is closer to described current time is more little.
Compared with prior art, the invention have the advantages that
Adopt the technical scheme of the embodiment of the present application, in grinding process, deviation ratio according to current discharge quantity deviation control discharge quantity determines the present confinement cycle, judge whether the current time distance last elapsed time in moment regulating current vibration frequency reaches the present confinement cycle more than, if, then utilize described deviation ratio that described current vibration frequency is adjusted, if it is not, then described current vibration frequency is adjusted by refusal at current time. Due to only current time with on once regulate current vibration frequency moment between reach present confinement cycle corresponding to deviation ratio time, current time just can perform the adjustment to current vibration frequency, therefore, frequency of vibration is adjusted before being adjusted in place by frequency of vibration after actual discharge quantity can be avoided to follow adjustment again, avoid the excessive adjustment to current vibration frequency, the actual discharge quantity avoiding ore grinding storehouse is excessively regulated and deviation control discharge quantity, thus realizing ore grinding storehouse discharge quantity is accurately controlled, indirectly realize the accurate control of ore milling product granularity.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is that the equipment relating to blanking in grinding process constitutes schematic diagram;
Fig. 2 is the flow chart of the embodiment of the method 1 regulating rock feeder frequency of vibration in the application in grinding process;
Fig. 3 is the flow chart calculating the current embodiment 1 revising discharge quantity in the embodiment of the present application;
Fig. 4 a is a kind of generation type schematic diagram revising subcycle in the embodiment of the present application;
Fig. 4 b is another generation type schematic diagram revising subcycle in the embodiment of the present application;
Fig. 5 is the flow chart calculating the current embodiment 1 revising discharge quantity in the embodiment of the present application;
Fig. 6 is the flow chart of the embodiment 1 regulating current vibration frequency in the embodiment of the present application;
Fig. 7 is the structure chart of the device embodiment 1 regulating rock feeder frequency of vibration in the application in grinding process;
Fig. 8 is the structure chart of an embodiment of adjustment module 704 in the embodiment of the present application;
Fig. 9 is the structure chart of the embodiment that coefficient determines submodule 801 in the embodiment of the present application;
Figure 10 is the structure chart of an embodiment of the embodiment of the present application large deviations calculating sub module 701;
Figure 11 is the structure chart of the embodiment revising submodule 1002 in the embodiment of the present application.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the application scheme, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, rather than whole embodiments. Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of the application protection.
Inventor finds through research, prior art, when carrying out ore grinding storehouse discharge quantity and controlling, when the actual discharge quantity of each detection, all can compare actual discharge quantity and control discharge quantity, if both are unequal, the frequency of vibration of vibrofeeder will be regulated with fixing regulated value. Visible, why frequency of vibration can excessively be regulated prior art, as long as reason is in that the actual discharge quantity of its current time and controls that discharge quantity is unequal will be adjusted frequency of vibration, but actual discharge quantity can not be adjusted in place immediately after actually frequency of vibration is conditioned, therefore, even if the discharge quantity that the frequency of vibration after regulating is corresponding has met control discharge quantity, between being adjusted in place during this period of time, frequency of vibration yet can be regulated self-regulation frequency of vibration to actual discharge quantity again.
Based on above-mentioned discovery, the main thought of the application is: in grinding process, first the deviation ratio according to current discharge quantity deviation control discharge quantity determines the present confinement cycle, then judge whether reach the present confinement cycle more than between current time and the last moment regulating frequency of vibration, if reached, deviation ratio is utilized to regulate frequency of vibration, if not up to, refuse at current time, frequency of vibration to be adjusted. Owing to the time between twice adjustment needs to reach the constraint cycle more than, upper once regulate frequency of vibration after actual discharge quantity can be adjusted putting in place within the constraint cycle, reach the discharge quantity that the frequency of vibration after last adjustment is corresponding, thus can avoid not following the adjustment of upper frequency of vibration due to actual discharge quantity and the frequency of vibration that causes excessively is regulated.
After the basic thought describing the application, below in conjunction with accompanying drawing, described in detail the control method of ore grinding storehouse blanking in the application grinding process and the specific implementation of device by embodiment.
Referring to Fig. 2, it is shown that the application grinding process regulates the flow chart of the embodiment of the method 1 of rock feeder frequency of vibration. In the present embodiment, for instance specifically may comprise steps of:
The actual discharge quantity that S201, basis are previously detected and preserve, calculates the deviation ratio of current discharge quantity deviation control discharge quantity.
Owing to the mineral aggregate in ore grinding storehouse is by the vibrofeeder conveyer belt by blanking to conveyer, so the actual discharge quantity in ore grinding storehouse can be detected by material flow detection device on a conveyor, for instance belt conveyer scale. In the present embodiment, each discharge quantity, mass flow may refer to the weight of mineral aggregate. Wherein, the detection to actual discharge quantity can be every a fixing sampling period, and just detection is once, for instance, one actual discharge quantity of detection per second also preserves.It addition, the actual discharge quantity detected can adopt the mode of data base to preserve.
In the present embodiment, deviation ratio can be deviation value and the ratio controlled between discharge quantity, or, deviation ratio can also be the ratio between the absolute value of deviation value and control discharge quantity, or, deviation ratio can also is that the percent of any one ratio. Wherein, deviation value is current discharge quantity and the difference controlled between discharge quantity. It should be noted that, current discharge quantity can be the actual discharge quantity that current time detects, now namely deviation ratio is the deviation between the actual discharge quantity of current time and control discharge quantity, or, current discharge quantity can also be weighted discharge quantity meansigma methods that is average and that obtain by the actual discharge quantity detected in the nearest time period.
Owing to the mineral aggregate in ore grinding storehouse is not of uniform size, there is fluctuation in the speed that under same frequency of vibration, mineral aggregate is thrown in, therefore, actual discharge quantity exists certain fluctuating error. And calculate deviation ratio iff the actual discharge quantity adopting current time, also can there is fluctuating error in deviation ratio, thus utilizing this deviation ratio cannot accurately regulate frequency of vibration. In order to avoid this problem, the present embodiment preferred average weighted mode can obtain current discharge quantity.
Referring to Fig. 3, it is shown that the present embodiment calculates the flow chart of the embodiment 1 of deviation ratio. Present embodiment may include that
S301, detect described ore grinding storehouse and at the actual discharge quantity of current time and preserve.
Wherein, during as adopted data base to preserve actual discharge quantity, can be saved in real-time data base by currently regulating the actual discharge quantity needing to use, it is saved in historical data base without the actual discharge quantity used, namely, the actual discharge quantity in the nearest correction cycle hereinafter described is saved in real-time data base, and the actual discharge quantity being not belonging in the nearest correction cycle is saved in historical data base, in order to carry out having only to acquisition desired data from real-time data base when currently regulating. When actual discharge quantity being detected, it is possible to be first saved in real-time data base by this actual discharge quantity, and after a correction cycle, then this actual discharge quantity is moved to the mad middle preservation of historical data.
S302, in the nearest correction cycle preserve each actual discharge quantity be weighted on average, calculate described current correction discharge quantity; A described nearest correction cycle for end time and adopts the time span preset with described current time.
Wherein it is possible to adopt various ways to calculate currently revise discharge quantity, namely weighted average can adopt various ways. In the first possible calculation, for each actual discharge quantity, weight coefficient (each weight coefficient is added equal to 1) is set sequentially in time, first weight coefficient corresponding for each actual discharge quantity is multiplied, more each product addition is currently revised discharge quantity. Wherein, weight coefficient can be identical, now currently revises discharge quantity and is equivalent to the meansigma methods of each actual discharge quantity; Weight coefficient can also differ, for instance the weight coefficient closer to current time is more big. The calculation that the second is possible, multiple correction subcycle can be formed in the correction cycle, and sequentially in time different weight coefficients (each weight coefficient is added equal to 1) is set for each correction subcycle, first calculate each and revise the meansigma methods of each actual discharge quantity in subcycle, then weight coefficient corresponding for the meansigma methods of each correction subcycle is multiplied, more each product addition is currently revised discharge quantity. Wherein, the generation type revising subcycle can also have multiple, such as, as shown in fig. 4 a, can being divided into multiple correction subcycle sequentially in time the correction cycle, namely what obtain after now revising subcycle combination is the correction cycle, or and for example, as shown in Figure 4 b, multiple initial time can also be chosen within the correction cycle, and revises subcycle using the time period between each initial time and current time as each.
Referring to Fig. 5, it is shown that present embodiment calculates the flow chart of the current embodiment 1 revising discharge quantity. In the present embodiment, employing be choose within the correction cycle multiple initial time formed multiple correction subcycle to each revise subcycle actual discharge quantity meansigma methods be weighted average mode, calculate and currently revise discharge quantity. In the present embodiment, S302 may include that
S501, from each moment in the described correction cycle, choose at least two initial time, using the time period respectively and between described current time of the initial time each described as revising subcycle.
Wherein, initial time can be any time in the described correction cycle. Such as, if the correction cycle is 60 seconds before current time, revise subcycle can include 10 seconds before current time, 30 seconds, 60 seconds etc., then the corresponding moment such as revise before the current time respectively current time that subcycle is corresponding 10 seconds, 30 seconds, 60 seconds.
It should be noted that on the one hand, in order to utilize all actual discharge quantity in the correction cycle, initial time can include the start time in correction cycle, and the correction subcycle now formed is this correction cycle itself; On the other hand, in order to strengthen currently practical discharge quantity weight in weighted average, initial time can include the end time in correction cycle namely current time, and the correction subcycle now formed is current time, also only includes currently practical discharge quantity; Another further aspect, revises subcycle to balance aforementioned two kinds, and initial time can also include the center time point in correction cycle, the half that time span is the correction cycle revising subcycle now formed. Based on this, in present embodiment, initial time can preferably include the start time in correction cycle, center time point and end time.
S502, calculate the meansigma methods of each actual discharge quantity in each described correction subcycle, as the average discharge quantity of correction subcycle each described.
S503, by the product addition of the average discharge quantity of each described correction subcycle Yu the weight coefficient of described correction subcycle, obtain described current correction discharge quantity; Wherein, each described weight coefficient sum is 1.
Wherein, average discharge quantity corresponding to subcycle of revising for making the time more long obtains more big weight, it is possible to make initial time be closer to the weight coefficient revising subcycle of described current time more little.
Such as, adopt the start time in correction cycle, end time and end time as initial time, then following formula can be adopted to calculate and currently revise discharge quantity:
WI=a1×WIend+a2×WImid+a3×WIstart;
Wherein, WI for currently to revise discharge quantity, WIendFor the actual discharge quantity of current time, WIstartFor the meansigma methods of actual discharge quantity each in the correction cycle, WImidThe meansigma methods of center time point to each actual discharge quantity between current time for revising the cycle, a1～a3Respectively the first to the 3rd weight coefficient and a1>a2>a3. Such as, taking current time first 60 seconds is correction cycle, then WIstartFor the meansigma methods of actual discharge quantity, WI in nearest 60 secondsmidFor the meansigma methods of actual discharge quantity in nearest 30 seconds; Wherein, a10.2, a can be preferably20.3, a can be preferably30.5 can be preferably.
It is then returned to after Fig. 3, S302 performed, perform S303.
S303, using described current correction discharge quantity as described current discharge quantity, calculate described current discharge quantity and deviate the deviation ratio of described control discharge quantity.
Wherein, deviation ratio can adopt equation below to calculate:
In above formula, WI is current discharge quantity, WI0For controlling discharge quantity, P is deviation ratio.
It should be noted that in present embodiment, it is possible to after the actual discharge quantity detecting every time and preserving current time, just calculate deviation ratio and determine whether to regulate current vibration frequency, that is, performed S301 just then perform S302 and S303 every time. But, such that regulate excessively frequent. Therefore, in present embodiment, the calculating cycle being longer than the detection cycle can also be set, if detecting the moment of current time distance last execution S302 of actual discharge quantity when having performed S301 not up to the calculating cycle, then do not perform S302, and be to wait for then performing S301 and detect the actual discharge quantity of subsequent time, until it reaches when calculating the cycle, enter back into the execution of S302. Such as, when the detection cycle is 1 second, the calculating cycle could be arranged to 5 seconds.
It is then returned to after Fig. 2, S201 performed, perform S202.
S202, belonging to described deviation ratio numerical range, it is determined that the present confinement cycle that described deviation ratio is corresponding.
Wherein it is possible to constraint cycle corresponding to each numerical range can be identical, or, it is possible to constraint cycle corresponding to constraints that each numerical range is corresponding can be different. Such as, the deviation ratio that affiliated numerical range is more big, adopt the more long present confinement cycle. Now, if the more big amplitude of accommodation to current vibration frequency of numerical range is more big, then the constraint cycle that the amplitude of accommodation is more big can be made longer, reduce the error regulated further.
Such as, using P as deviation ratio, the cycle that retrains when P>=0.5 can be 4T, and when 0.2<P,<cycle that retrains when 0.5 can be 3T, and when 0.1,<cycle that retrains during P≤0.2 can be 2T, and the cycle that retrains when P≤0.1 can be T. Wherein, T can be preferably 100 seconds.
S203, judge whether the elapsed time in moment of the last current vibration frequency regulating described rock feeder of described current time distance reaches the described present confinement cycle more than; If it is, enter S204, if it does not, enter S205.
Wherein, the last moment regulated refers to the moment that the current vibration frequency last time of vibrofeeder changes.
S204, utilize described deviation ratio that described current vibration frequency is adjusted.
When adopting fixing regulated value that current vibration frequency is adjusted, if deviation ratio is very low, then can make current vibration frequency accommodative excess, if deviation ratio is significantly high, current vibration frequency then can be made to regulate deficiency, therefore, the present embodiment is utilize deviation ratio that current vibration frequency is adjusted. In addition, in the present embodiment, the frequency of vibration of vibrofeeder is actually controlled by the motor of vibrofeeder, after current vibration frequency after determining adjustment according to deviation ratio, the running current of corresponding adjustment motor then can be carried out according to the current vibration frequency after regulating, the output moment of torsion being made motor by the adjustment of running current is changed, thus realizing the adjustment to current vibration frequency.
It should be noted that in the present embodiment, when utilizing deviation ratio to regulate current vibration frequency, it is possible to adopt multiple different regulative mode.
The first possible regulative mode is the product that is multiplied with described deviation ratio using a fixing predetermined coefficient as regulated value, this regulated value is added with current vibration frequency adjusted after current vibration frequency.
The regulative mode that the second is possible, is the adjustment factor of determining regulated value of the numerical range belonging to deviation ratio, and specifically, shown in Figure 6, step S504 may include that
S601, numerical range belonging to described deviation ratio, it is determined that the adjustment factor to described current vibration frequency.
S602, using the product between described adjustment factor and described deviation ratio, described current vibration frequency as the regulated value of described current vibration frequency, described current vibration frequency is adjusted, obtains current vibration frequency to recalculate.
Specifically, the current vibration frequency recalculated can be calculated by following formula:
SI=SI+m × P × SI;
Wherein, SI is current vibration frequency, and m is adjustment factor, and P is deviation ratio.
When determining adjustment factor, it is possible to first determine the numerical range belonging to described deviation ratio, determine the current vibration frequency after selecting following corresponding mode to calculate adjustment further according to affiliated numerical range:
(1) if described deviation ratio belongs to the first proportion, it is determined that described adjustment factor is the product of the first predetermined coefficient and symbol coefficient, now, the current vibration frequency after adjustment such as can be calculated by following formula:
m=b1× c;
Wherein, m is adjustment factor, b1Being the first predetermined coefficient, c is symbol coefficient; Such as, b11/3 can be preferably;
(2) if described deviation ratio belongs to the second proportion, it is determined that described adjustment factor is the product of the second predetermined coefficient and symbol coefficient, now, the current vibration frequency after adjustment such as can be calculated by following formula:
m=b2× c;
Wherein, m is adjustment factor, b2Being the second predetermined coefficient, c is symbol coefficient; Such as, b21/2 can be preferably;
(3) if described deviation ratio belongs to the 3rd proportion, it is determined that described adjustment factor is the product of the 3rd predetermined coefficient and symbol coefficient, now, the current vibration frequency after adjustment such as can be calculated by following formula:
m=b3× c;
Wherein, m is adjustment factor, b3Being the 3rd predetermined coefficient, c is symbol coefficient; Such as, b31 can be preferably;
(4) if described deviation ratio belongs to the 4th proportion, it is determined that described adjustment factor is the product of the 4th predetermined coefficient and symbol coefficient, now, the current vibration frequency after adjustment such as can be calculated by following formula:
m=b4× c;
Wherein, m is adjustment factor, b4Being the 4th predetermined coefficient, c is symbol coefficient; Such as, b41 can be preferably;
(5) if described deviation ratio belongs to the 5th proportion, it is determined that described adjustment factor is 0.
In these five kinds of modes of above-mentioned (1)～(5), described first proportion to described 5th proportion can be sequentially reduced, described first predetermined coefficient to described 4th predetermined coefficient can be sequentially reduced and be all higher than 0, and symbol coefficient can be calculated by following formula:
Wherein, c is symbol coefficient, and WI is for currently revising discharge quantity, and WI0 is for controlling discharge quantity.
Such as, the first proportion can be P>=0.5, and the second proportion can be 0.2<P<0.5, and the 3rd proportion can be 0.1<P≤0.2, and the 4th proportion can be 0.02<P≤0.1, and the 5th proportion can be P≤0.02.
It is then returned to Fig. 2, when the judged result of S203 is no, enters S205.
Described current vibration frequency is adjusted by S205, refusal at current time.
After S204 or S205 has performed, it is possible to through regulating cycle after calculating from this deviation ratio, return again to the S201 calculating continuing the deviation ratio of subsequent time.
It should be noted that when introducing in the present embodiment, involved design parameter setting value is all illustrative of, and the pre-set parameter in the present embodiment includes but not limited to numerical value enumerated above.
By the technical scheme of the present embodiment, due to only current time with on once regulate current vibration frequency moment between reach present confinement cycle corresponding to deviation ratio time, current time just can perform the adjustment to current vibration frequency, therefore, after current vibration frequency is conditioned, could again regulate after needing wait constraint end cycle, and actual discharge quantity can be adjusted in place within the constraint cycle, thus avoiding the excessive adjustment to current vibration frequency, the actual discharge quantity avoiding ore grinding storehouse is excessively regulated and deviation control discharge quantity, thus realizing ore grinding storehouse discharge quantity is accurately controlled, indirectly realize the accurate control of ore milling product granularity.
Corresponding to embodiment of the method, the embodiment of the present application additionally provides the device regulating rock feeder frequency of vibration in a kind of grinding process.
Referring to Fig. 7, it is shown that the application regulates in grinding process the structure chart of the device embodiment 1 of rock feeder frequency of vibration. In the present embodiment, described device may include that
Deviation computing module 701, for according to the actual discharge quantity being previously detected and preserving, calculating current discharge quantity and deviate the deviation ratio of described control discharge quantity;
Constraint cycle module 702, for numerical range belonging to described deviation ratio, it is determined that the present confinement cycle that described deviation ratio is corresponding;
Constraint judge module 703, for judging whether the elapsed time in moment that described current time changes apart from the current vibration frequency of last described rock feeder reaches the described present confinement cycle more than;
Bias adjustment module 704, for when described constraint judges the judged result of submodule 703 for being, utilizing described deviation ratio that described current vibration frequency is adjusted;
Refusal adjustment module 705, the judged result for judging submodule 703 in described constraint is no, described current vibration frequency is adjusted by refusal at current time.
In the first possible embodiment of the present embodiment, the numerical range belonging to described deviation ratio is more big, and the determined described present confinement cycle is more long.
In the embodiment that the second of the present embodiment is possible, referring to Fig. 8, described bias adjustment module 704 specifically may include that
Coefficient determines submodule 801, for the numerical range belonging to described deviation ratio, it is determined that the adjustment factor to described current vibration frequency;
Regulating calculation submodule 802, for the regulated value using the product between described adjustment factor and described deviation ratio, described current vibration frequency as described current vibration frequency, described current vibration frequency is adjusted, obtains current vibration frequency to recalculate.
In the third possible embodiment of the present embodiment, in conjunction with the 4th kind of possible embodiment of the present embodiment, referring to Fig. 9, described coefficient determines that submodule 801 includes:
Range determination submodule 901, for determining the numerical range belonging to described deviation ratio;
First scope submodule 902, for when described deviation ratio belongs to the first proportion, it is determined that described adjustment factor is the product of the first predetermined coefficient and symbol coefficient;
Second scope submodule 903, for when described deviation ratio belongs to the second proportion, it is determined that described adjustment factor is the product of the second predetermined coefficient and symbol coefficient;
3rd scope submodule 904, for when described deviation ratio belongs to three proportions, it is determined that described adjustment factor is the product of the 3rd predetermined coefficient and symbol coefficient;
4th scope submodule 905, for when described deviation ratio belongs to four proportions, it is determined that described adjustment factor is the product of the 4th predetermined coefficient and symbol coefficient;
5th scope submodule 906, for when described deviation ratio belongs to five proportions, it is determined that described adjustment factor is 0;
Wherein, described first proportion to described 5th proportion is sequentially reduced, and described first predetermined coefficient to described 4th predetermined coefficient is sequentially reduced and is all higher than 0, and described symbol coefficient is calculated by following formula:
Wherein, c is symbol coefficient, and WI is for currently revising discharge quantity, and WI0 is for controlling discharge quantity.
In the 4th kind of possible embodiment of the present embodiment, referring to Figure 10, described deviation computing module 701 includes:
Detection sub-module 1001, and preserves at the actual discharge quantity of current time for detecting described ore grinding storehouse;
Revise submodule 1002, for being weighted on average to each the actual discharge quantity preserved in the nearest correction cycle, calculate described current correction discharge quantity; A described nearest correction cycle for end time and adopts the time span preset with described current time;
Calculating sub module 1003, for using described current correction discharge quantity as described current discharge quantity, calculating described current discharge quantity and deviate the deviation ratio of described control discharge quantity.
In the 5th kind of possible implementation of the present embodiment, in conjunction with the 4th kind of possible implementation of the present embodiment, referring to Figure 11, described correction submodule 1002 includes:
Choose submodule 1101, for choosing at least two initial time from each moment in the described correction cycle, using the time period respectively and between described current time of the initial time each described as revising subcycle;
Average submodule 1102, for calculating the meansigma methods of each actual discharge quantity in each described correction subcycle, as the average discharge quantity of correction subcycle each described;
Weighting submodule 1103, for the product addition by the average discharge quantity of each described correction subcycle with the weight coefficient of described correction subcycle, obtains described current correction discharge quantity;
Wherein, each described weight coefficient sum is 1.
In the 6th kind of possible embodiment of the present embodiment, in conjunction with the 5th kind of possible embodiment of the present embodiment, described initial time includes the start time in described correction cycle, center time point and end time.
In the 6th kind of possible embodiment of the present embodiment, in conjunction with the 5th kind of possible embodiment of the present embodiment, the weight coefficient revising subcycle that initial time is closer to described current time is more little.
By the technical scheme of the present embodiment, due to only current time with on once regulate current vibration frequency moment between reach present confinement cycle corresponding to deviation ratio time, current time just can perform the adjustment to current vibration frequency, therefore, after current vibration frequency is conditioned, could again regulate after needing wait constraint end cycle, and actual discharge quantity can be adjusted in place within the constraint cycle, thus avoiding the excessive adjustment to current vibration frequency, the actual discharge quantity avoiding ore grinding storehouse is excessively regulated and deviation control discharge quantity, thus realizing ore grinding storehouse discharge quantity is accurately controlled, indirectly realize the accurate control of ore milling product granularity.
It should be noted that, in this article, the relational terms of such as first and second or the like is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially. Term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that include the process of a series of key element, method, article or equipment not only include those key elements, but also include other key elements being not expressly set out, or also include the key element intrinsic for this process, method, article or equipment. When there is no more restriction, statement " including ... " key element limited, it is not excluded that there is also other identical element in including the process of described key element, method, article or equipment.
For device embodiment, owing to it corresponds essentially to embodiment of the method, so relevant part illustrates referring to the part of embodiment of the method. System embodiment described above is merely schematic, the wherein said unit illustrated as separating component can be or may not be physically separate, the parts shown as unit can be or may not be physical location, namely may be located at a place, or can also be distributed on multiple NE. Some or all of module therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme. Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
The above is only the detailed description of the invention of the application; it should be pointed out that, for those skilled in the art, under the premise without departing from the application principle; can also making some improvements and modifications, these improvements and modifications also should be regarded as the protection domain of the application.
Claims (14)
1. the method regulating rock feeder frequency of vibration in a grinding process, it is characterised in that including:
According to the actual discharge quantity being previously detected and preserving, calculate the deviation ratio of current discharge quantity deviation control discharge quantity;
Numerical range belonging to described deviation ratio, it is determined that the present confinement cycle that described deviation ratio is corresponding;
Judge whether the elapsed time in moment of the last current vibration frequency regulating described rock feeder of current time distance reaches the described present confinement cycle more than;
If it is, utilize described deviation ratio that described current vibration frequency is adjusted;
If it is not, then described current vibration frequency is adjusted by refusal at current time;
Wherein, the actual discharge quantity that described basis is previously detected and preserves, calculate the deviation ratio of described current discharge quantity deviation control discharge quantity, including:
Detect ore grinding storehouse at the actual discharge quantity of current time and to preserve;
Each the actual discharge quantity preserved in the nearest correction cycle is weighted on average, calculates and currently revise discharge quantity; A described nearest correction cycle for end time and adopts the time span preset with described current time;
Using described current correction discharge quantity as described current discharge quantity, calculate described current discharge quantity and deviate the deviation ratio of described control discharge quantity.
2. method according to claim 1, the numerical range belonging to described deviation ratio is more big, and the determined described present confinement cycle is more long.
3. method according to claim 1, it is characterised in that described utilize described deviation ratio that described current vibration frequency is adjusted, including:
According to the numerical range belonging to described deviation ratio, it is determined that the adjustment factor to described current vibration frequency;
Using the product between described adjustment factor and described deviation ratio, described current vibration frequency as the regulated value of described current vibration frequency, described current vibration frequency is adjusted, obtains current vibration frequency to recalculate.
4. method according to claim 3, it is characterised in that described numerical range belonging to described deviation ratio, it is determined that the adjustment factor to described current vibration frequency, including:
Determine the numerical range belonging to described deviation ratio;
If described deviation ratio belongs to the first proportion, it is determined that described adjustment factor is the product of the first predetermined coefficient and symbol coefficient;
If described deviation ratio belongs to the second proportion, it is determined that described adjustment factor is the product of the second predetermined coefficient and symbol coefficient;
If described deviation ratio belongs to the 3rd proportion, it is determined that described adjustment factor is the product of the 3rd predetermined coefficient and symbol coefficient;
If described deviation ratio belongs to the 4th proportion, it is determined that described adjustment factor is the product of the 4th predetermined coefficient and symbol coefficient;
If described deviation ratio belongs to the 5th proportion, it is determined that described adjustment factor is 0;
Wherein, described first proportion to described 5th proportion is sequentially reduced, and described first predetermined coefficient to described 4th predetermined coefficient is sequentially reduced and is all higher than 0, and described symbol coefficient is calculated by following formula:
Wherein, c is symbol coefficient, WI for currently to revise discharge quantity, WI0For controlling discharge quantity.
5. method according to claim 1, it is characterised in that the described actual discharge quantity to preserving in the nearest correction cycle is weighted on average, calculates described current correction discharge quantity, including:
At least two initial time is chosen, using the time period respectively and between described current time of the initial time each described as revising subcycle from each moment in the described correction cycle;
Calculate the meansigma methods of each actual discharge quantity in each described correction subcycle, as the average discharge quantity of correction subcycle each described;
By the product addition of the average discharge quantity of each described correction subcycle Yu the weight coefficient of described correction subcycle, obtain described current correction discharge quantity;
Wherein, each described weight coefficient sum is 1.
6. method according to claim 5, it is characterised in that described initial time includes the start time in described correction cycle, center time point and end time.
7. method according to claim 5, it is characterised in that the weight coefficient revising subcycle that initial time is closer to described current time is more little.
8. a grinding process regulates the device of rock feeder frequency of vibration, it is characterised in that including:
Deviation computing module, for according to the actual discharge quantity being previously detected and preserving, calculating the deviation ratio of current discharge quantity deviation control discharge quantity;
Constraint cycle module, for numerical range belonging to described deviation ratio, it is determined that the present confinement cycle that described deviation ratio is corresponding;
Constraint judge module, for judging whether the elapsed time in moment that current time changes apart from the current vibration frequency of last described rock feeder reaches the described present confinement cycle more than;
Bias adjustment module, for when the judged result of described constraint judge module is for being, utilizing described deviation ratio that described current vibration frequency is adjusted;
Refusal adjustment module, for when the judged result of described constraint judge module is no, described current vibration frequency is adjusted by refusal at current time;
Wherein, described deviation computing module includes:
Detection sub-module, and preserves at the actual discharge quantity of current time for detecting ore grinding storehouse;
Revise submodule, for each the actual discharge quantity preserved in the nearest correction cycle is weighted on average, calculates and currently revise discharge quantity; A described nearest correction cycle for end time and adopts the time span preset with described current time;
Calculating sub module, for using described current correction discharge quantity as described current discharge quantity, calculating described current discharge quantity and deviate the deviation ratio of described control discharge quantity.
9. device according to claim 8, it is characterised in that the numerical range belonging to described deviation ratio is more big, the determined described present confinement cycle is more long.
10. device according to claim 8, it is characterised in that described bias adjustment module includes:
Coefficient determines submodule, for the numerical range belonging to described deviation ratio, it is determined that the adjustment factor to described current vibration frequency;
Regulating calculation submodule, for the regulated value using the product between described adjustment factor and described deviation ratio, described current vibration frequency as described current vibration frequency, is adjusted described current vibration frequency, obtains current vibration frequency to recalculate.
11. device according to claim 10, it is characterised in that described coefficient determines that submodule includes:
Range determination submodule, for determining the numerical range belonging to described deviation ratio;
First scope submodule, for when described deviation ratio belongs to the first proportion, it is determined that described adjustment factor is the product of the first predetermined coefficient and symbol coefficient;
Second scope submodule, for when described deviation ratio belongs to the second proportion, it is determined that described adjustment factor is the product of the second predetermined coefficient and symbol coefficient;
3rd scope submodule, for when described deviation ratio belongs to three proportions, it is determined that described adjustment factor is the product of the 3rd predetermined coefficient and symbol coefficient;
4th scope submodule, for when described deviation ratio belongs to four proportions, it is determined that described adjustment factor is the product of the 4th predetermined coefficient and symbol coefficient;
5th scope submodule, for when described deviation ratio belongs to five proportions, it is determined that described adjustment factor is 0;
Wherein, described first proportion to described 5th proportion is sequentially reduced, and described first predetermined coefficient to described 4th predetermined coefficient is sequentially reduced and is all higher than 0, and described symbol coefficient is calculated by following formula:
Wherein, c is symbol coefficient, WI for currently to revise discharge quantity, WI0For controlling discharge quantity.
12. device according to claim 8, it is characterised in that described correction submodule includes:
Choose submodule, for choosing at least two initial time from each moment in the described correction cycle, using the time period respectively and between described current time of the initial time each described as revising subcycle;
Average submodule, for calculating the meansigma methods of each actual discharge quantity in each described correction subcycle, as the average discharge quantity of correction subcycle each described;
Weighting submodule, for the product addition by the average discharge quantity of each described correction subcycle with the weight coefficient of described correction subcycle, obtains described current correction discharge quantity;
Wherein, each described weight coefficient sum is 1.
13. device according to claim 12, it is characterised in that described initial time includes the start time in described correction cycle, center time point and end time.
14. device according to claim 12, it is characterised in that the weight coefficient revising subcycle that initial time is closer to described current time is more little.
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| CN101251396A (en) * | 2008-04-02 | 2008-08-27 | 罗放明 | Energy-saving grinder swirler closed-loop system and control method |
| CN101532081A (en) * | 2009-04-17 | 2009-09-16 | 中冶长天国际工程有限责任公司 | Method and device for optimizing sintering solid fuel mixing rate |
| CN101941602A (en) * | 2010-08-09 | 2011-01-12 | 中国神华能源股份有限公司 | Automatic feed control method |
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| JPS60128106A (en) * | 1983-12-15 | 1985-07-09 | Shinko Electric Co Ltd | Hopper constant-discharge device |
| JPH09313960A (en) * | 1996-05-31 | 1997-12-09 | Ube Ind Ltd | Operation controlling method for engine driving type gyratory crusher |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251396A (en) * | 2008-04-02 | 2008-08-27 | 罗放明 | Energy-saving grinder swirler closed-loop system and control method |
| CN101532081A (en) * | 2009-04-17 | 2009-09-16 | 中冶长天国际工程有限责任公司 | Method and device for optimizing sintering solid fuel mixing rate |
| CN101941602A (en) * | 2010-08-09 | 2011-01-12 | 中国神华能源股份有限公司 | Automatic feed control method |
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