CN102828317A - Closed-loop control system for controlling harness frame vibration - Google Patents
Closed-loop control system for controlling harness frame vibration Download PDFInfo
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- CN102828317A CN102828317A CN2012103359159A CN201210335915A CN102828317A CN 102828317 A CN102828317 A CN 102828317A CN 2012103359159 A CN2012103359159 A CN 2012103359159A CN 201210335915 A CN201210335915 A CN 201210335915A CN 102828317 A CN102828317 A CN 102828317A
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- 230000001133 acceleration Effects 0.000 claims abstract description 16
- 235000014676 Phragmites communis Nutrition 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 10
- 239000011888 foil Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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Abstract
The invention discloses a closed-loop control system for controlling harness frame vibration. The closed-loop control system comprises a harness frame, a motor, a beam middle section bending sensor and an acceleration sensor, wherein the motor is used for driving the harness frame to reciprocate through a speed reducer and an opening mechanism in turn; the beam middle section bending sensor is arranged in a middle position outside an upper beam of the harness frame; the acceleration sensor is fixed outside the upper beam of the harness frame; an encoder is driven by the motor through a set of gear pair; output signals of the encoder, the beam middle section bending sensor and the acceleration sensor are respectively transferred to a speed control panel of the harness frame through a time window generator, a signal acquisition amplifier and a load amplifier; after the signals are processed by the speed control panel of the harness frame, the signals are transferred to a motor driver; and a running speed of the motor is controlled by the motor driver, thereby forming the closed-loop control system. Monitoring signals for the harness frame vibration and bending are fed back to the speed control panel of the opening mechanism and an output is adjusted by a speed controller according to a difference between a preset speed and a vibration bending measured feedback value, so that the rotating speed of the opening mechanism is adjusted.
Description
Technical field
The present invention relates to the loom field,, relate in particular to a kind of system that changes the vibration of shedding mechanism speed controlling heald frame in particular to a kind of closed-loop control system of heald frame vibration control.
Background technology
On loom, the motion that shedding mechanism is accomplished is simple linear reciprocating motion, but dynamic force and dynamic force moment are very big.Use the passive cam shedding system of combining of going back to; Inertia force can instantaneous rising, when overcomes the return spring restraining force, and 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 bending significantly of heald frame crossbeam, and the crossbeam of adjacent heald frame produces bump.
In shedding mechanism, the heald frame band warp thread and is pumped, and heald frame all has one period quiescent time in minimum and extreme higher position, in lift or fall journey and finish back heald frame crossbeam high vibration.The vibration pattern of heald frame crossbeam is complicated, also produces vibration in the vertical direction of integrated box movement, and promptly 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 bending 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 is crooked all to be unallowed with colliding.
The 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, so the speed of service should avoid critical speed, and the bending of heald frame crossbeam just can significantly reduce.
The motion of controlling opening ideally 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 it is the main cause of warp end break and other part damage that low frequency significantly vibrates.
Summary of the invention
The objective of the invention 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 collision and crossbeam case of bending between the heald frame in real time; Measuring-signal feeds back to the control system, and 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 present invention realizes through following technical scheme:
A kind of closed-loop control system of heald frame vibration control; Comprise a brown frame; It is reciprocating that one motor drives said heald frame through decelerator, shedding mechanism successively; Also comprise one be arranged on the centre position, the entablature outside of said brown frame crossbeam middle bent sensor and be fixed on the acceleration transducer in the entablature outside of said brown frame, the said entablature outside refers to the side of heald frame near reed; Said motor drives encoder through one group of gear pair; The output signal of said encoder, said crossbeam middle bent sensor and said acceleration transducer is passed to heald frame speed controlling plate through time window maker, signals collecting amplifier and load amplifier respectively; Said heald frame speed controlling plate is passed to motor driver after signal is handled; Control the running speed of said motor by said motor driver, form said closed-loop control system.
Further; Said encoder produces the angle signal of one group of main shaft; Be passed to said time window maker, said time window maker is a timer, and the signal that said time window maker sends is corresponding in the time period of upper and lower stall position with said heald frame.
Preferably, said motor is a servomotor, and said motor driver is servo bag.
Preferably, said motor is a variable-frequency motor, and said motor driver is a frequency converter.
Further; Said integrated box movement control panel comprises gate circuit and comparator, and the signal that said time window maker, said signals collecting amplifier and said load amplifier transmit is successively through exporting said motor driver to behind said gate circuit, the said comparator.
Operation principle of the present invention 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 desired signal behind the door.The heald frame speed control is crooked according to speed of setting and heald frame, the vibration measurement value of feedback, regulates motor speed output, presses the supply frequency of the size adjustment motor of controlled quentity controlled variable, thereby slightly regulates rotating speed of motor.
The invention has the beneficial effects as follows:
1, obtains case of bending through the crossbeam bend sensor; Obtain the collision status between crossbeam through the crossbeam acceleration transducer; Just can correctly understand the stressed 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 controlling plate of shedding mechanism, speed control is regulated output by the speed of setting and the difference of vibration 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, and the heald frame speed of service is between the adjacent two rank natural frequencies of vibration, and is all far away from the two rank natural frequencies of vibration.The speed of service is avoided critical speed, and the bending of heald frame crossbeam just can significantly reduce.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention, understands technological means of the present invention in order can more to know, and can implement according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. specify as after.The specific embodiment of the present invention is provided by following examples and accompanying drawing thereof in detail.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 closed-loop control system sketch map of the present invention;
Fig. 2 heald frame speed controlling plate principle schematic;
Fig. 3 crossbeam middle bent sensor and acceleration transducer installation site sketch map;
Fig. 4 is Fig. 3 right view;
Fig. 5 integrated box movement curve map.
Label declaration among the figure: 1, motor, 2, decelerator, 3, shedding mechanism, 4, heald frame; 5, crossbeam middle bent sensor, 6, acceleration transducer, 7, the signals collecting amplifier, 8, the load amplifier; 9, heald frame speed controlling plate, 901, gate circuit, 902, comparator, 10, motor driver; 11, encoder, 12, the time window maker, 13, gear pair.
The specific embodiment
Below with reference to accompanying drawing and combine embodiment, specify the present invention.
With reference to shown in Figure 1; A kind of closed-loop control system of heald frame vibration control; Comprise a brown frame 4; It is reciprocating that one motor 1 drives said heald frame 4 through decelerator 2, shedding mechanism 3 successively, also comprise one be arranged on the centre position, the entablature outside of said brown frame 4 crossbeam middle bent sensor 5 and be fixed on the acceleration transducer 6 in the entablature outside of said brown frame 4, refer to the side of heald frame outside the said entablature near reed; Said motor 1 drives encoder 11 through one group of gear pair 13; The output signal of said encoder 11, said crossbeam middle bent sensor 5 and said acceleration transducer 6 is passed to heald frame speed controlling plate 9 through time window maker 12, signals collecting amplifier 7 and load amplifier 8 respectively; Said heald frame speed controlling plate 9 is passed to motor driver 10 after signal is handled; Running speed by the said motor 1 of said motor driver 10 controls forms said closed-loop control system.
In one embodiment, said motor is a servomotor, and said motor driver is servo bag.
In one embodiment, said motor is a variable-frequency motor, and said motor driver is a 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 of heald frame 4 entablature, directly is fastened on the crossbeam with bolt.Crossbeam middle bent sensor 5 is the bridge-type foil gauge, is installed on the middle part of first page of heald frame 4 equally, and four foil gauges stick on the 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 the vibration values and the amount of bow of the quiescent phase of high extreme lower position.
In the present embodiment, said encoder 11 produces the angle signal of one group of main shaft, is passed to said time window maker 12, and said 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 a descending branch, and B is an extreme higher position pause section, and D is an 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; Said integrated box movement control panel 9 comprises gate circuit 901 and comparator 902, and the signal that said time window maker 12, said signals collecting amplifier 7 and said load amplifier 8 transmit is successively through exporting said motor driver 10 to behind said gate circuit 901, the said 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 desired signal behind the door.
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 big.Former rank intrinsic frequency of heald frame 4 is input in the heald frame speed controlling plate 9; When online output quantity is excessive, make comparisons real-time speed and former rank intrinsic frequency, let heald frame 4 operate in the intermediate zone of two adjacent intrinsic frequencies; Reach minimum vibration and bending, to confirm the increase and decrease amplitude of speed.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the closed-loop control system of a heald frame vibration control; Comprise a brown frame (4); One motor (1) successively through decelerator (2), that shedding mechanism (3) drives said heald frame (4) is reciprocating; It is characterized in that: also comprise one be arranged on the centre position, the entablature outside of said brown frame (4) crossbeam middle bent sensor (5) and be fixed on the acceleration transducer (6) in the entablature outside of said brown frame (4), refer to the side of heald frame outside the said entablature near reed;
Said motor (1) drives encoder (11) through one group of gear pair (13); The output signal of said encoder (11), said crossbeam middle bent sensor (5) and said acceleration transducer (6) is passed to heald frame speed controlling plate (9) through time window maker (12), signals collecting amplifier (7) and load amplifier (8) respectively; Said heald frame speed controlling plate (9) is passed to motor driver (10) after signal is handled; Control the running speed of said motor (1) by said motor driver (10), form said closed-loop control system.
2. the closed-loop control system of heald frame vibration control according to claim 1; It is characterized in that: said encoder (11) produces the angle signal of one group of main shaft; Be passed to said time window maker (12); Said time window maker (12) is a timer, and the signal that said time window maker (12) sends is corresponding in the time period of upper and lower stall position with said heald frame (4).
3. the closed-loop control system of heald frame vibration control according to claim 1 is characterized in that: said motor (1) is a servomotor, and said motor driver (10) is servo bag.
4. the closed-loop control system of heald frame vibration control according to claim 1 is characterized in that: said motor (1) is a variable-frequency motor, and said motor driver (10) is a frequency converter.
5. according to the closed-loop control system of any described heald frame vibration control of claim in the claim 1 to 4; It is characterized in that: said integrated box movement control panel (9) comprises gate circuit (901) and comparator (902), and the signal that said time window maker (12), said signals collecting amplifier (7) and said load amplifier (8) transmit is successively through exporting said motor driver (10) to behind said gate circuit (901), the said comparator (902).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103359159A CN102828317A (en) | 2012-09-12 | 2012-09-12 | Closed-loop control system for controlling harness frame vibration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103359159A CN102828317A (en) | 2012-09-12 | 2012-09-12 | Closed-loop control system for controlling harness frame vibration |
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| CN102828317A true CN102828317A (en) | 2012-12-19 |
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| CN2012103359159A Pending CN102828317A (en) | 2012-09-12 | 2012-09-12 | Closed-loop control system for controlling harness frame vibration |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234618A (en) * | 2013-05-07 | 2013-08-07 | 江苏万工科技集团有限公司 | Vibration measurement device and method for jet loom rack |
| CN103668637A (en) * | 2013-12-09 | 2014-03-26 | 江苏万工科技集团有限公司 | Shedding knife vibration control device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0359275A2 (en) * | 1988-09-16 | 1990-03-21 | Tsudakoma Kogyo Kabushiki Kaisha | Picking period setting device for a loom |
| JPH04174736A (en) * | 1990-10-30 | 1992-06-22 | Yokoi Sangyo Kk | Apparatus for detecting position of heald frame of loom |
| CN101782458A (en) * | 2009-12-17 | 2010-07-21 | 江苏万工科技集团有限公司 | Motion test device of motion law of shedding mechanism |
| CN101813551A (en) * | 2009-12-17 | 2010-08-25 | 江苏万工科技集团有限公司 | Beating-up vibration test device |
| CN101812755A (en) * | 2009-12-17 | 2010-08-25 | 江苏万工科技集团有限公司 | Device for controlling movement of harness frame |
| CN101852646A (en) * | 2009-12-17 | 2010-10-06 | 江苏万工科技集团有限公司 | Device for detecting residual vibration of heald frame and detection method thereof |
| CN202881540U (en) * | 2012-09-12 | 2013-04-17 | 江苏万工科技集团有限公司 | Closed-loop control system for heald frame vibration control |
-
2012
- 2012-09-12 CN CN2012103359159A patent/CN102828317A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0359275A2 (en) * | 1988-09-16 | 1990-03-21 | Tsudakoma Kogyo Kabushiki Kaisha | Picking period setting device for a loom |
| JPH04174736A (en) * | 1990-10-30 | 1992-06-22 | Yokoi Sangyo Kk | Apparatus for detecting position of heald frame of loom |
| CN101782458A (en) * | 2009-12-17 | 2010-07-21 | 江苏万工科技集团有限公司 | Motion test device of motion law of shedding mechanism |
| CN101813551A (en) * | 2009-12-17 | 2010-08-25 | 江苏万工科技集团有限公司 | Beating-up vibration test device |
| CN101812755A (en) * | 2009-12-17 | 2010-08-25 | 江苏万工科技集团有限公司 | Device for controlling movement of harness frame |
| CN101852646A (en) * | 2009-12-17 | 2010-10-06 | 江苏万工科技集团有限公司 | Device for detecting residual vibration of heald frame and detection method thereof |
| CN202881540U (en) * | 2012-09-12 | 2013-04-17 | 江苏万工科技集团有限公司 | Closed-loop control system for heald frame vibration control |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234618A (en) * | 2013-05-07 | 2013-08-07 | 江苏万工科技集团有限公司 | Vibration measurement device and method for jet loom rack |
| CN103234618B (en) * | 2013-05-07 | 2015-01-07 | 江苏万工科技集团有限公司 | Vibration measurement device and method for jet loom rack |
| CN103668637A (en) * | 2013-12-09 | 2014-03-26 | 江苏万工科技集团有限公司 | Shedding knife vibration control device |
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Application publication date: 20121219 |