CN1060825C - Automatic control method and system for cottonseed roll density in stripping machine - Google Patents
Automatic control method and system for cottonseed roll density in stripping machine Download PDFInfo
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- CN1060825C CN1060825C CN94117684A CN94117684A CN1060825C CN 1060825 C CN1060825 C CN 1060825C CN 94117684 A CN94117684 A CN 94117684A CN 94117684 A CN94117684 A CN 94117684A CN 1060825 C CN1060825 C CN 1060825C
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- volume density
- pressing plate
- cottonseed
- controller
- cottonseed volume
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Abstract
The present invention belongs to the technical field of automatic control of a cotton processing machine. The present invention provides a method and a system which are characterized in that a horizontal ruler with a sliding counter weight is fixedly connected to a pressing plate of a working box of a linter; an angle sensor for detecting the swing angle of the pressing plate is arranged on a frame; a variable speed motor and a density control instrument of the components of the variable speed motor, such as a speed setting controller, a speed reducer, etc., are controlled by the angle change of the pressing plate so that automatic control of the density of cotton seed rolls is completed. The present invention has the advantages of simple operation, palpability, reliable work and obvious control effect, and the method and the system can be applied to linters of various types.
Description
The invention belongs to the automatic control technology field of cotton processing machinery, particularly to the autocontrol method and the device of delinter cottonseed volume density.
The cottonseed volume density of delinter is meant the tightness that cottonseed is rolled up in the working box in the delinter, and it is the key factor that suede quality and treating capacity are shelled in directly influence.The cottonseed volume density is big more, and the treating capacity of delinter is high more, but stripping suede is of poor quality; Otherwise when cottonseed volume density hour, stripping suede quality is good, but treating capacity is low.Therefore, be necessary to the control of cottonseed volume density, have only the cottonseed volume density is controlled on the proper level, can existing reasonable crudy, also can reach certain treating capacity simultaneously.The autocontrol method of delinter cottonseed volume density and the research of implement device are subjected to paying close attention to widely, and obtain remarkable progress.
The size of cottonseed volume density depends on the seed speed of feeding.Because the shape of delinter working box, size are fixed basically, so hello seed speed is high more, the cottonseed volume density will be big more; Otherwise the cottonseed volume density can be more little.Feeding seed is to finish by relatively rotating of seed feeding roller, therefore feeds the rotating speed that seed speed depends on seed feeding roller again.Therefore, adopt what method to go control to adjust the seed feeding roller rotating speed, choose which type of detection method, how the signal of relevant cottonseed volume density is gathered, and is to realize cottonseed the volume density key problem in technology and the technological difficulties of control automatically.
At present, all delinters all adopt mechanical cottonseed volume autocontrol method.This method operation principle has the pressing plate that can swing as shown in Figure 1 above the delinter working box, its pivot angle changes with cottonseed roll-shape size variation.Between seed feeding roller and drive motors, be provided with a clutch, it links to each other with pressing plate by a cover mechanism, and when the clockwise pendulum angle of pressing plate surpasses certain value, this cover mechanism will make throw-out-of clutch, stop to feed seed.That is to say that when the cottonseed volume arrives to a certain degree greatly, this cover mechanism will guarantee to feed seed and stop, and reduce up to the cottonseed volume.This method is actually thinks that the shape size of cottonseed volume has reflected the cottonseed volume density, thereby has reached the purpose of controlling its density by restriction cottonseed roll-shape size.
The weak point of this method is: 1. controlled variable is the shape size of cottonseed volume, untrue reflection cottonseed volume density: 2. structure more complicated, adjust also very inconvenient: 3. the briquetting swing is frequent, causing and feeding seed is an intermittent process, cottonseed volume density in the working box is therefore in fact also unstable, thereby has influenced stripping suede quality; 4. on effect, this method does not play the effect of stable regulation cottonseed volume density, and just makes the cottonseed volume density be no more than certain value.
The objective of the invention is to overcome above-mentioned existing methods weak point, propose a kind of brand-new autocontrol method and automatic control system thereof the cottonseed volume density.Make it have advantages such as the control effect is remarkable, method is simple, easy and simple to handle, anti-working environment disturbs by force, working stability is reliable.
The delinter cottonseed volume density autocontrol method that the present invention proposes comprises at least that pivot angle that by delinter working box top one can swing pressing plate changes to control to feed the seed buncher, and this method comprises following each step:
(1), regulates this weight in the position on the scale and this weight is located on scale, so that the restriction of pressing plate pivot angle within the specific limits by being secured to the slip weight of installing on a horizontal ruler on the described pressing plate and this scale;
(2) angular transducer of installing on frame by the pressing plate top, the pressing plate pivot angle value that is reflected owing to the cottonseed volume density fluctuation that forms in the working box when constantly measuring delinter work also converts this pivot angle value to signal of telecommunication U
α
(3) by a cottonseed volume density auto-controller to above-mentioned signal U
αHandle to obtain a control signal U
c
(4) with control signal U
cInput electric machine speed regulation controller so that FEEDBACK CONTROL is fed the seed buncher, makes the corresponding change of this motor speed, feeds seed speed so that the cottonseed volume density keeps stable thereby change;
It is characterized in that above-mentioned control method can make the cottonseed volume density keep stable on new level by regulating the feedback factor of cottonseed volume density controller.
The inventor has carried out factual survey and in-depth analysis to the course of work of delinter, think, the cottonseed of different densities volume can produce different pressure to pressing plate in the working box, therefore also can cause different pivot angles simultaneously, be actually the cottonseed volume pressure and such two parameters of pressing plate pivot angle of pressing plate have been reflected the cottonseed volume density in the working box.For this reason, the present invention proposes a kind of autocontrol method of brand-new delinter cottonseed volume density, even pressing plate produces adjustable fixation pressure to the cottonseed volume, monitor the pivot angle of delinter course of work center platen simultaneously, and this pivot angle signal is converted to the signal of telecommunication, FEEDBACK CONTROL is adjusted the seed feeding roller rotating speed of motor again, reaches the seed speed of feeding of adjusting, the purpose of control cottonseed volume density.
The groundwork principle of this method is (mainly being divided into two aspects): 1. affixed scale on pressing plate, weight is installed on the scale, and weight can slide on scale.Along with the position difference of weight on scale, pressing plate can produce different pressure to the cottonseed volume.When weight after fixed-site on the scale, pressing plate produces a fixed pressure to cottonseed volume.At this moment, 2. the density of cottonseed volume will influence the pivot angle of pressing plate, and density is big more, and pivot angle is also big more.Angular transducer is converted to signal of telecommunication U with the pivot angle signal of pressing plate
αAfter handling, produce a control signal U again
c, be added on the machine governor rotation speed n of control buncher
0, and then by decelerator driving seed feeding roller control hello seed speed n
FTherefore, in process,, following feedback procedure is arranged then if the cottonseed volume density increases:
α ↑ → U
α↓ → U
C↓ → n
D↓ → n
F→ α ↓, this process has suppressed the increase of cottonseed volume density.Certainly, also there is one to suppress the reduction of cottonseed volume density with above-mentioned opposite process.These two kinds of processes make the cottonseed volume density can be stabilized on certain level, and, if change the feedback proportional of this feedback procedure, the cottonseed volume density can reach stable again on a new level so, thereby realizes the automatic control and the adjusting of cottonseed volume density.
The present invention designs a kind of delinter cottonseed volume density automatic control system according to said method, at least comprise with the delinter working box on the affixed scale of pressing plate and the weight that can on scale, slide, it is characterized in that also comprising hello seed buncher and electric machine speed regulation controller, decelerator, detect the angular transducer of pressing plate pivot angle, cottonseed volume density auto-controller, said cottonseed volume density auto-controller comprises adjusts the amplifying signal modulate circuit to the signal of said sensor output, signal to this modulate circuit output carries out filter circuit for filtering, the display circuit that filtered signal is shown, the adjustable PID adjuster of parameter that filtered signal is adjusted, described angular transducer is connected to described cottonseed volume density auto-controller, described cottonseed volume density auto-controller is connected with described electric machine speed regulation controller by its PID adjuster, and described decelerator is connected between motor output end and the seed feeding roller.As shown in Figure 2.Scale and pressing plate are affixed, and weight can be so that pressing plate produces a fixed pressure to the cottonseed volume after fixed-site on the scale.Angular transducer and frame are fixed, detect the pivot angle of pressing plate by the spacing that detects gauge head and pressing plate, and convert the pivot angle signal to the signal of telecommunication and be input in the density controller, handle back output one control signal and remove to control the electric machine speed regulation controller, and then adjustment rotating speed of motor, make seed feeding roller speed obtain adjusting, thereby guarantee that the cottonseed volume density remains under the stable state.
The critical component of native system is a density controller, and it is made up of each circuit of the adjustable PID adjuster of signal conditioning circuit, filter circuit, display circuit and parameter, as shown in Figure 3.
Wherein, 1. signal conditioning circuit is mainly finished adjustment, the amplification to the sensor output signal of telecommunication, makes its excursion be suitable for the required scope of machine governor; 2. filter circuit is used for the filtering input signal because the caused AC compounent of machine vibration; 3. display circuit can drive analog meter or digital watch to show the pairing pressing plate pivot angle of the cottonseed volume density value of actual measurement; 4. the adjustable PID adjuster of parameter, in this PID control correction link, specially PI and PD link are separated, and can distinguish in the larger context and regulate separately, do like this and make controller can be adapted to different types, different working environment and job requirement, under various conditions, as long as this PID adjuster is done suitably to adjust, just can make controller control effect reach best.The whole circuit of controller are installed in the instrument box, at the instrument container front panel demonstration and density setting knob are installed, this knob can change the feedback proportional in the feedback procedure noted earlier, thereby can set the interior cottonseed volume density of working box by it.
The present invention has following characteristics:
(1) the measured object of this method has reflected the cottonseed volume density exactly, and practice shows that this reflection is very sensitive, and the control effect is remarkable;
(2) feeding seed is continuous process, has therefore improved stripping suede quality widely, has guaranteed process throughput;
(3) practice shows, this automatic control system makes suede cotton amount improve a grade on the basis that guarantees the machining treating capacity, and can guarantee that this quality keeps stable in the processing overall process;
(4) simple to operate, clear, the reliable operation of this automatic control system;
(5) native system measure error≤3%, departure≤8%.
This automatic control system can be assemblied on the various trades mark, the various types of delinter easily, all can reach above-mentioned performance and technical indicator through Installation and Debugging.
Brief Description Of Drawings:
Fig. 1 is a prior art operation principle schematic diagram.
Fig. 2 is a general structure schematic diagram of the present invention.
Fig. 3 is a cottonseed volume density auto-controller circuit theory schematic diagram of the present invention.
Fig. 4 is an embodiments of the invention cottonseed volume density auto-controller circuit theory schematic diagram.
The present invention designs the cottonseed volume density automatic control system embodiment on a kind of MRF160-10 of being assemblied in type delinter, and it partly is made up of scale and weight, angular transducer, cottonseed volume density auto-controller, machine governor, buncher, decelerator etc.
Each several part is described in detail as follows:
The general structure of present embodiment as shown in Figure 2, among the figure:
1. the long 500mm of scale, minimum scale 5mm, weight weight 1kg.Scale and delinter working box top board are affixed, can swing with pressing plate.Weight can slide on scale, and holding screw is arranged, when weight after set up position on the scale, can weight be tightened on the scale by screw;
2. angular transducer adopts the non-contact electric eddy sensor, its gauge head is fixed on the frame, pivot angle corresponding to pressing plate changes in 0 °～30 ° scopes, and the gap between gauge head and hold-down plate surface changes between 3mm～0.5mm, and sensor records the pressing plate pivot angle indirectly by surveying the gap.The range of sensor is 3mm, certainty of measurement 1%, and with voltage system output, output voltage range 0～-12V.0.4 volt/degree of sensitivity.
3. cottonseed volume density auto-controller is installed in the controller chassis of delinter, has a voltage input and a voltage output.Voltage input meets sensor output U
αAnd be that sensor is powered; Voltage output connects machine governor, output voltage control signal U
cAnd obtain the required power supply of instrument work from the latter.The static relation of its output, input is
U
c=-K
FU
α
Wherein KF is adjustable constant, is used for the setting of cottonseed volume density.
The circuit theory of present embodiment cottonseed volume density auto-controller as shown in Figure 4.Circuit is with four operational amplifier A
1-A
4Be core formation, wherein A
1Finish the function of signal condition, filtering; A
2Be used to drive density indication gauge outfit CS, indicate the pressing plate pivot angle, i.e. the density situation; A
3, A
4Then constituted the adjustable PID adjuster of parameter, can be by regulating duplex potentiometer R
1Or R
2Regulate its dynamic parameter, so that instrument is adapted to different types, different working environment and the control under the job requirement.At the output of instrument, by regulator potentiometer R
3Change feedback factor KF noted earlier, set selector switch K is used for the switching of the manual duty of system, and when K switch was in shown position, system works was an auto state, and when being in the another location, system is in the manual work state.
4. machine governor has the input of two-way voltage, and wherein one the tunnel for the input of control voltage, connects the output of cottonseed volume density controller; Another road is the feedback voltage input, connects the tachometer generator voltage output in the buncher.Its output connects the armature of buncher electromagnetic clutch, and utilization controllable silicon DC speed regulation method is adjusted buncher.
5. buncher is the electromagnetic type buncher, by the speed governing of control electromagnetic clutch armature supply.Its power is 0.8KW, adjustable range of speeds 0-1400rpm.
6. the decelerator speed reducing ratio is 1: 70, and power shaft connects buncher by 1: 1: 5 belt, and output shaft drives the delinter seed feeding roller.
The whole system course of work can be described below:
In the adjusting stage at initial stage of machine, system can place the manual work state by switch among Fig. 4, and feeding seed will be by workman's manual adjustments potentiometer R
3Change hello seed motor speed and finish, in this course, regulate weight position on scale, make pressing plate pivot angle maximum be no more than 30 °, tighten weight then.
At this moment, system can be placed in automatic mode.Sensor is measured pressing plate pivot angle α, converts voltage signal U to
αGive density controller, machine governor is exported the control voltage U by it
C, so that buncher is in rotation speed n
DFollowing operation, and drive seed feeding roller with rotation speed n by decelerator
FFeed seed, the cottonseed under institute feeds will make pressing plate generation pivot angle α.This dynamic process reaches a dynamic equilibrium the most at last because, if pressing plate pivot angle α increases, will have α ↑ → U
α↓ → U
C↓ → n
D↓ → n
F→ α ↓, such negative feedback process suppresses its increase; On the contrary, the pressing plate pivot angle reduce also can be suppressed.Thereby such control system makes the pressing plate pivot angle stable, that is to say and has stablized the cottonseed volume density.If regulator potentiometer R
3, system again can be under new cottonseed volume density state steady operation.
Claims (2)
1, a kind of delinter cottonseed volume density autocontrol method comprises at least that pivot angle that by delinter working box top one can swing pressing plate changes to control to feed the seed buncher, and this method comprises following each step:
(1), regulates this weight in the position on the scale and this weight is located on scale, so that the restriction of pressing plate pivot angle within the specific limits by being secured to the slip weight of installing on a horizontal ruler on the described pressing plate and this scale;
(2) angular transducer of installing on frame by the pressing plate top, the pressing plate pivot angle value that is reflected owing to the cottonseed volume density fluctuation that forms in the working box when constantly measuring delinter work also converts this pivot angle value to signal of telecommunication U
α
(3) by a cottonseed volume density auto-controller to above-mentioned signal U
αHandle to obtain a control signal U
c
(4) with control signal U
cInput electric machine speed regulation controller so that FEEDBACK CONTROL is fed the seed buncher, makes the corresponding change of this motor speed, feeds seed speed so that the cottonseed volume density keeps stable thereby change;
It is characterized in that above-mentioned control method can make the cottonseed volume density keep stable on new level by regulating the feedback factor of cottonseed volume density controller.
2, a kind of cottonseed volume density automatic control system of method according to claim 1, at least comprise with the delinter working box on the affixed scale of pressing plate and the weight that can on scale, slide, it is characterized in that also comprising hello seed buncher and electric machine speed regulation controller, decelerator, detect the angular transducer of pressing plate pivot angle, cottonseed volume density auto-controller, said cottonseed volume density auto-controller comprises adjusts the amplifying signal modulate circuit to the signal of said sensor output, signal to this modulate circuit output carries out filter circuit for filtering, the display circuit that filtered signal is shown, the adjustable PID adjuster of parameter that filtered signal is adjusted, described angular transducer is connected to described cottonseed volume density auto-controller, described cottonseed volume density auto-controller is connected with described electric machine speed regulation controller by its PID adjuster, and described decelerator is connected between motor output end and the seed feeding roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94117684A CN1060825C (en) | 1994-11-04 | 1994-11-04 | Automatic control method and system for cottonseed roll density in stripping machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94117684A CN1060825C (en) | 1994-11-04 | 1994-11-04 | Automatic control method and system for cottonseed roll density in stripping machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1106866A CN1106866A (en) | 1995-08-16 |
| CN1060825C true CN1060825C (en) | 2001-01-17 |
Family
ID=5038471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94117684A Expired - Fee Related CN1060825C (en) | 1994-11-04 | 1994-11-04 | Automatic control method and system for cottonseed roll density in stripping machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1060825C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243394B (en) * | 2013-04-26 | 2015-07-29 | 江苏银桥纺织科技有限公司 | A kind of even cotton feeder |
| CN107829147A (en) * | 2017-08-05 | 2018-03-23 | 广州思谋信息科技有限公司 | High efficiency cotton gin is used in a kind of Cotton Production processing |
-
1994
- 1994-11-04 CN CN94117684A patent/CN1060825C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1106866A (en) | 1995-08-16 |
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