CN202881540U - Closed-loop control system for heald frame vibration control - Google Patents
Closed-loop control system for heald frame vibration control Download PDFInfo
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- CN202881540U CN202881540U CN 201220463319 CN201220463319U CN202881540U CN 202881540 U CN202881540 U CN 202881540U CN 201220463319 CN201220463319 CN 201220463319 CN 201220463319 U CN201220463319 U CN 201220463319U CN 202881540 U CN202881540 U CN 202881540U
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- 230000001133 acceleration Effects 0.000 claims abstract description 15
- 230000033001 locomotion Effects 0.000 claims description 11
- 235000014676 Phragmites communis Nutrition 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 11
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
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- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The utility model discloses a closed-loop control system for heald frame vibration control, which comprises a heald frame, wherein a motor drives the heald frame to reciprocate sequentially through a speed reducer and an opening mechanism. The closed-loop control system also comprises a beam middle bending sensor arranged in the middle position of the outer side of an upper beam of the heald frame and an acceleration sensor fixed on the outer side of the upper beam of the heald frame; the motor drives an encoder through a group of gear pairs; the output signals of the encoder, the beam middle bending sensor and the acceleration sensor are transferred to a heald frame speed control board through a time window generator, a signal acquisition amplifier and a load amplifier respectively; the heald frame speed control board processes the signals and then transfers the signals to a motor driver; and the motor driver controls the operation speed of the motor to form the closed-loop control system. The heald frame vibration and bending monitoring signal is fed back to the speed control board of the opening mechanism, and the speed controller adjusts the output according to the difference between the set speed and the feedback value of vibration bending measurement so as to adjust the rotation speed of the opening mechanism.
Description
Technical field
The utility model relates to the loom field, in particular to a kind of closed-loop control system of heald frame vibration control, relates in particular to a kind of system that changes the vibration of shedding mechanism speed control heald frame.
Background technology
On loom, the motion that shedding mechanism is finished is simple linear reciprocating motion, but dynamic force and dynamic force moment are very large.Use the passive cam shedding system of combining of going back to, the instantaneous rising of inertia force meeting, when overcomes the return spring restraining force, roller follower instantaneous disengagement from the cam face, tripping and impact cause the vibration of heald frame crossbeam, the result causes the heald frame crossbeam to shake by force, the significant bending of heald frame crossbeam, and the crossbeam of adjacent heald frame produces bump.
In shedding mechanism, heald frame pumps with warp thread, and heald frame has one period quiescent time in minimum and extreme higher position, lift or fall journey finish after heald frame crossbeam high vibration.The vibration form of heald frame crossbeam is complicated, also produces vibration in the vertical direction of integrated box movement, and namely the heald frame crossbeam produces crookedly, and the crossbeam middle bent can reach 5 millimeters, therefore needs to measure the amount of bow of heald frame crossbeam.Heald frame length is the shortest 2250 millimeters, thickness is less than 10 millimeters, and adjacent heald frame all can produce bending and since the different vibration shape, crossbeam bend direction can be identical also can be opposite, cause the collision between the adjacent heald frame, therefore need to measure the collision between heald frame and the heald frame.Excessive crossbeam bend and collision all are unallowed.
Case of bending and the collision between the heald frame of heald frame crossbeam are relevant with the speed of service of loom, the speed of service of loom is far above the critical speed of heald frame, especially wide cut heald frame, the heald frame speed of service is between the critical speed of the former rank of heald frame, therefore the speed of service should be avoided critical speed, and the bending of heald frame crossbeam just can greatly reduce.
The motion of controlling ideally opening relies on sensitive signal and Closed loop Control, and heald frame is driving all warp thread when weaving, the end breakage rate of the good direct correlation warp thread of integrated box movement.The opening of warp thread is maximum when the extreme lower position of heald frame, and warp tension is maximum, and warp end break mainly occurs in this zone.The condition of work of heald frame is very poor, and the low frequency Large Amplitude Vibration is the main cause that warp end break and other part damage.
The utility model content
The purpose of this utility model is to overcome the above problem that prior art exists, a kind of closed-loop control system of heald frame vibration control is provided, measure in real time collision and crossbeam bend state between the heald frame, measuring-signal feeds back to control system, according to the motion state of heald frame, appropriateness changes the speed of shedding mechanism.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the utility model is achieved through the following technical solutions:
A kind of closed-loop control system of heald frame vibration control, comprise a heald frame, it is reciprocating that one motor drives described heald frame by decelerator, shedding mechanism successively, comprise that also a crossbeam middle bent sensor and that is arranged on the centre position, the entablature outside of described heald frame is fixed on the acceleration transducer in the entablature outside of described heald frame, the described entablature outside refers to that heald frame is near a side of reed; Described motor drives encoder by one group of gear pair, the output signal of described encoder, described crossbeam middle bent sensor and described acceleration transducer is passed to heald frame speed control panel by time window maker, Signal Collection and amplify device and load amplifier respectively, described heald frame speed control panel is passed to motor driver after signal is processed, control the running speed of described motor by described motor driver, form described closed-loop control system.
Further, described encoder produces the angle signal of one group of main shaft, be passed to described time window maker, described time window maker is a timer, and the signal that described time window maker sends is corresponding in the time period of upper and lower stall position with described heald frame.
Preferably, described motor is servomotor, and described motor driver is servo bag.
Preferably, described motor is variable-frequency motor, and described motor driver is frequency converter.
Further, described integrated box movement control panel comprises gate circuit and comparator, and the signal that described time window maker, described Signal Collection and amplify device and described load amplifier transmit is successively by exporting described motor driver to behind described gate circuit, the described comparator.
Operation principle of the present utility model is:
With the collision of acceleration transducer measuring vibrations, measure the amount of bow of heald frame crossbeam with bend sensor.The angle signal of encoder output loom main shaft, angle signal be through the timing signal of the upper and lower stall position of time window maker output heald frame, the timing signal warp of heald frame real time acceleration and crooked signal and upper and lower stall position with export behind the door desired signal.The heald frame speed control is crooked according to the speed of setting and heald frame, the vibration measurement value of feedback, the output of regulating electric machine speed, the supply frequency of pressing the size adjustment motor of controlled quentity controlled variable, thereby the rotating speed of small size regulating electric machine.
The beneficial effects of the utility model are:
1, obtains case of bending by the crossbeam bend sensor, obtain collision status between crossbeam by the crossbeam acceleration transducer, just can correctly understand the force and deformation state of heald frame from the measured data of the deflection of heald frame crossbeam and vibratory output, can know and know whether the opening process is normal.
2, utilize heald frame vibration and crooked monitor signal to feed back to the speed control panel of shedding mechanism, speed control is pressed the speed of setting and the difference regulation output that vibrates the flexural measurement value of feedback, thereby regulates the rotating speed of shedding mechanism.Because former rank natural frequency of vibration of heald frame is very low, therefore the heald frame speed of service should select appropriate rotating speed between the natural frequency of vibration of former rank heald frame, the heald frame speed of service between the adjacent two rank natural frequencies of vibration, from the two rank natural frequencies of vibration all away from.The speed of service is avoided critical speed, and the bending of heald frame crossbeam just can greatly reduce.
Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of specification, below with preferred embodiment of the present utility model and cooperate accompanying drawing to be described in detail as follows.The specific embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, consists of the application's a part, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 closed-loop control system schematic diagram described in the utility model;
Fig. 2 heald frame speed control panel principle schematic;
Fig. 3 crossbeam middle bent sensor and acceleration transducer installation site schematic diagram;
Fig. 4 is Fig. 3 right view;
Fig. 5 integrated box movement curve map.
Number in the figure explanation: 1, motor, 2, decelerator, 3, shedding mechanism, 4, heald frame, 5, crossbeam middle bent sensor, 6, acceleration transducer, 7, Signal Collection and amplify device, 8, the load amplifier, 9, heald frame speed control panel, 901, gate circuit, 902, comparator, 10, motor driver, 11, encoder, 12, time window maker, 13, gear pair.
The specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
With reference to shown in Figure 1, a kind of closed-loop control system of heald frame vibration control, comprise a heald frame 4, it is reciprocating that one motor 1 drives described heald frame 4 by decelerator 2, shedding mechanism 3 successively, comprise that also a crossbeam middle bent sensor 5 and that is arranged on the centre position, the entablature outside of described heald frame 4 is fixed on the acceleration transducer 6 in the entablature outside of described heald frame 4, the described entablature outside refers to that heald frame is near a side of reed; Described motor 1 drives encoder 11 by one group of gear pair 13, the output signal of described encoder 11, described crossbeam middle bent sensor 5 and described acceleration transducer 6 is passed to heald frame speed control panel 9 by time window maker 12, Signal Collection and amplify device 7 and load amplifier 8 respectively, described heald frame speed control panel 9 is passed to motor driver 10 after signal is processed, running speed by the described motor 1 of described motor driver 10 controls forms described closed-loop control system.
In one embodiment, described motor is servomotor, and described motor driver is servo bag.
In one embodiment, described motor is variable-frequency motor, and described motor driver is frequency converter.
With reference to Fig. 3, shown in Figure 4, in the present embodiment, acceleration transducer 6 is installed on the outer middle side part of first page heald frame 4 entablatures, directly is fastened on the crossbeam with bolt.Crossbeam middle bent sensor 5 is the bridge-type foil gauge, is installed on equally the middle part of first page heald frame 4, and four strain gauge adhesions are on heald frame 4.Heald frame 4 respectively has one section quiescent phase in minimum and extreme higher position, in lift or fall vibratory output after journey finishes for maximum, so surveyed area be heald frame 4 in the highest extreme lower position, extract heald frame 4 in vibration values and the amount of bow of the quiescent phase of high extreme lower position.
In the present embodiment, described encoder 11 produces the angle signal of one group of main shaft, is passed to described time window maker 12, and described time window maker 12 is timers.With reference to shown in Figure 5, the curve movement of heald frame 4 is divided into four sections, and A is the ascent stage, and C is descending branch, and B is extreme higher position pause section, and D is extreme lower position pause section.12 of time window makers are got B section and D section.
With reference to shown in Figure 2, in the present embodiment, described integrated box movement control panel 9 comprises gate circuit 901 and comparator 902, and the signal that described time window maker 12, described Signal Collection and amplify device 7 and described load amplifier 8 transmit is successively by exporting described motor driver 10 to behind described gate circuit 901, the described comparator 902.The angle signal of encoder 11 output loom main shafts, angle signal is through the timing signal of the upper and lower stall position of time window maker 12 output heald frames, the timing signal warp of heald frame 4 real time acceleration and crooked signal and upper and lower stall position with export behind the door desired signal.
The speed of service of loom is in the 10-15HZ scope, and former rank intrinsic frequency of heald frame 4 oscillation crosswise is in the 4-10HZ scope, and heald frame 4 speeds of service are in the scope of its former rank intrinsic frequency again, and heald frame 4 running environment are relatively poor, vibrate very large.Former rank intrinsic frequency of heald frame 4 is input in the heald frame speed control panel 9, when online output quantity is excessive, real-time speed and former rank intrinsic frequency are made comparisons, allow heald frame 4 operate in the intermediate zone of two adjacent intrinsic frequencies, reach minimum vibration and bending, to determine the increase and decrease amplitude of speed.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. the closed-loop control system of a heald frame vibration control, comprise a heald frame (4), one motor (1) successively by decelerator (2), that shedding mechanism (3) drives described heald frame (4) is reciprocating, it is characterized in that: comprise that also a crossbeam middle bent sensor (5) and that is arranged on the centre position, the entablature outside of described heald frame (4) is fixed on the acceleration transducer (6) in the entablature outside of described heald frame (4), the described entablature outside refers to that heald frame is near a side of reed;
Described motor (1) drives encoder (11) by one group of gear pair (13), described encoder (11), the output signal of described crossbeam middle bent sensor (5) and described acceleration transducer (6) is respectively by time window maker (12), Signal Collection and amplify device (7) and load amplifier (8) are passed to heald frame speed control panel (9), described heald frame speed control panel (9) is passed to motor driver (10) after signal is processed, control the running speed of described motor (1) by described motor driver (10), form described closed-loop control system.
2. the closed-loop control system of heald frame vibration control according to claim 1, it is characterized in that: described encoder (11) produces the angle signal of one group of main shaft, be passed to described time window maker (12), described time window maker (12) is a timer, and the signal that described time window maker (12) sends is corresponding in the time period of upper and lower stall position with described heald frame (4).
3. the closed-loop control system of heald frame vibration control according to claim 1, it is characterized in that: described motor (1) is servomotor, and described motor driver (10) is servo bag.
4. the closed-loop control system of heald frame vibration control according to claim 1, it is characterized in that: described motor (1) is variable-frequency motor, and described motor driver (10) is frequency converter.
5. the closed-loop control system of the described heald frame vibration control of any one claim in 4 according to claim 1, it is characterized in that: described integrated box movement control panel (9) comprises gate circuit (901) and comparator (902), and the signal that described time window maker (12), described Signal Collection and amplify device (7) and described load amplifier (8) transmit is successively by exporting described motor driver (10) to behind described gate circuit (901), the described comparator (902).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220463319 CN202881540U (en) | 2012-09-12 | 2012-09-12 | Closed-loop control system for heald frame vibration control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220463319 CN202881540U (en) | 2012-09-12 | 2012-09-12 | Closed-loop control system for heald frame vibration control |
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| CN202881540U true CN202881540U (en) | 2013-04-17 |
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| CN 201220463319 Expired - Fee Related CN202881540U (en) | 2012-09-12 | 2012-09-12 | Closed-loop control system for heald frame vibration control |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828317A (en) * | 2012-09-12 | 2012-12-19 | 江苏万工科技集团有限公司 | Closed-loop control system for controlling harness frame vibration |
| CN103308270A (en) * | 2013-06-04 | 2013-09-18 | 江苏万工科技集团有限公司 | Measuring method and device thereof for dynamic characteristics of negative open system |
| CN103397446A (en) * | 2013-08-21 | 2013-11-20 | 江苏万工科技集团有限公司 | Method and device for measuring correlation between warp tension and movement of vibrating components |
| CN103901789A (en) * | 2014-03-31 | 2014-07-02 | 华南理工大学 | Vibration output force following control device and control method thereof |
-
2012
- 2012-09-12 CN CN 201220463319 patent/CN202881540U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828317A (en) * | 2012-09-12 | 2012-12-19 | 江苏万工科技集团有限公司 | Closed-loop control system for controlling harness frame vibration |
| CN103308270A (en) * | 2013-06-04 | 2013-09-18 | 江苏万工科技集团有限公司 | Measuring method and device thereof for dynamic characteristics of negative open system |
| CN103397446A (en) * | 2013-08-21 | 2013-11-20 | 江苏万工科技集团有限公司 | Method and device for measuring correlation between warp tension and movement of vibrating components |
| CN103901789A (en) * | 2014-03-31 | 2014-07-02 | 华南理工大学 | Vibration output force following control device and control method thereof |
| CN103901789B (en) * | 2014-03-31 | 2017-01-25 | 华南理工大学 | Vibration output force following control device and control method thereof |
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| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20130912 |