CN104894793B - Real-time control method of gram weight of knitted fabric in thermoforming and system thereof - Google Patents
Real-time control method of gram weight of knitted fabric in thermoforming and system thereof Download PDFInfo
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- CN104894793B CN104894793B CN201510176462.3A CN201510176462A CN104894793B CN 104894793 B CN104894793 B CN 104894793B CN 201510176462 A CN201510176462 A CN 201510176462A CN 104894793 B CN104894793 B CN 104894793B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/02—Setting
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Abstract
The invention relates to a real-time control method of gram weight of knitted fabric in thermoforming and a system thereof. The method is characterized in that correlation coefficient and density of a fabric sample can be calibrated, detection is combined to obtain the real time gram weight of real time horizontal density and longitudinal density of the fabric by calculating, overfeeding amount of a heat-setting machine can be adjusted by a difference value of the real time gram weight of set gram weight, real time control of gram weight of knitted fabric in thermoforming can be realized, fabric gram weight can be stabilized in production, and product qualified rate is increased.
Description
Technical field
The present invention relates to textile printing and dyeing field, particularly relates to the control method of knitted fabric grammes per square metre in thermal finalization.
Background technology
At present, thermal finalization of the domestic textile printing and dyeing enterprises key link that fabric weight determines in process of production in fabric
Stage.As heat determines the difference of the constriction coefficient after stage different types of fabric by heat, drying oven of heat setting machine temperature is by speed etc.
Factor affects fluctuation occurs, the grammes per square metre which results in fabric during fabric heat-setting is unstable or even appearance is unqualified asks
Topic.The control of fabric weight is also relied on during caused by spinning industrial production at this stage and be accomplished manually.
The artificial control to fabric weight is the cloth that heat setting machine operator is completed from having shaped with grammes per square metre sampler
On remove one piece of circular cloth, then claim its weight on electronic scale.Will with customer order according to the meansigma methodss of multiple sampling and measuring
The grammes per square metre difference asked is adjusted to the overfeeding size of forming machine, obtains requiring the overfeeding in the range of grammes per square metre after adjusting repeatedly
Parameter value.This method is although simple, but there is many drawbacks.Manual detection control program can not realize fabric first
Continuous measurement in production process, to ensure that fabric weight meets the requirements in production process, it is necessary to multiple sampling monitoring fabric
The change of grammes per square metre, so not only very labor intensive but also can heavy damage fabric integrity, be not permitted in actual production
's.Secondly the result of manual measurement is affected by many factors：In sampling process, the stretching different degrees of to fabric causes measurement accurate
Exactness declines.It is achieved that the on-line measurement of fabric weight has very positive meaning with control for heat setting process process
Justice.
Chinese patent CN102888733B discloses the method that forming machine controls knitting fabric grammes per square metre, according to the actual feelings of fabric
Condition, predicts the value of overfeed ratio in advance, and to shaping, overfeed ratio is controlled so that the value control of production overfeeding is reasonable, to unknown fabric
More they tend to the grammes per square metre control of known fabric stable；In operation, various fabrics can be according to lower machine demand gram for spinner
Weight, easily converses setting process parameter.The patent simply requires to carry out setting process parameter according to the grammes per square metre of setting
Control, does not play real-time detection, control effect, and actual has little significance.
External existing for the product of Density measurement, which is based primarily upon photovoltaic principals.The detecting head master of detecting system
To constitute for upper and lower two parts.Fabric is passed through in centre position, and when fabric yarn is by probe, its image passes through a precise light
Learn camera lens to project on photoelectric cell, according to the property of tested fabric, sensor can adopt transmitted light or reflected light.Detection is obtained
The direct ratio of frequency is in yarn count, and then is calculated the filling density value of fabric.Because the filling density of its major control fabric, in reality
Can be used for Instructing manufacture personnel in the application of border and pick count is set according to the current grammes per square metre of fabric, and then control the grammes per square metre of fabric.
Can see that the system causes setting of the producers according to grammes per square metre difference to overshoot parameter to become by the analysis to adjusting process
In order to adjust the setting of filling density value parameter according to grammes per square metre difference.Its machine operations person does not have according to the process that production requirement is adjusted repeatedly
There is change, and the accuracy rate of its testing result also declines in express fast-growing is produced.
The content of the invention
Present invention is primarily targeted at overcoming the shortcoming of prior art, there is provided the real-time control of knitted fabric grammes per square metre in thermal finalization
Method and system processed, in making production process, fabric weight is stable, improves conforming product rate.
The present invention is adopted the following technical scheme that：
In thermal finalization, the real-time control method of knitted fabric grammes per square metre, comprises the steps：
Step one, obtains the real time imaging of fabric by industrial camera, the image information for obtaining is carried out by master controller
Process obtains the close and vertical close numerical value of real-time horizontal stroke of fabric；
Step 2, carries out weighing, carries out horizontal close and vertical close numerical value detection to fabric sample, and send result to main control
Device, to demarcate to the density of fabric and correlation coefficient；
Step 3, Density and phase relation that horizontal close, the vertical close numerical value and step 2 obtained according to step one is obtained
Number, is calculated the real-time grammes per square metre of current textile；
Step 4, adjusts the overfeeding of heat setting machine according to the difference between the real-time grammes per square metre and setting grammes per square metre of current textile
Amount.
The grammes per square metre for setting fabric in above-mentioned steps two is as follows with the formula of density relationship：M=(α+λ β) ρ, in formula, m is fabric
Grammes per square metre, α is horizontal close for fabric, and β is vertical close for fabric, and λ is correlation coefficient, and ρ is the density of fabric.
The fabric sample of two diverse locations is chosen when density and correlation coefficient to fabric is demarcated, and obtains two groups of samples
This grammes per square metre, horizontal close and vertical close numerical value, substitute into the formula, obtain m1=(α1+λβ1) ρ and m2=(α2+λβ2) two equations of ρ
Formula, so that calculate correlation coefficient λ and the density p of the fabric sample.
Above-mentioned steps three are when the real-time grammes per square metre of current textile is calculated according to the real-time horizontal stroke that obtains is close, vertical close numerical value α, β generation
Enter formula m=(α+λ β) ρ.
The real-time control system of knitted fabric grammes per square metre in thermal finalization, including：
Textile image acquisition device, to obtain the real time imaging of fabric, and sends the image information of acquisition to master control
Device processed, by master controller to Image Information Processing with the close and vertical close numerical value of the real-time horizontal stroke for obtaining current textile；
Fabric sample caliberating device, detects to the sample to current textile, to obtain the phase relation of current textile
Number and density, and send the correlation coefficient of acquisition and density values to master controller；
Master controller, to the real-time horizontal stroke according to current textile it is close, indulge the correlation coefficient of close numerical value and current textile and
Density calculates the real-time grammes per square metre of current textile, is adjusted according to the difference between the real-time grammes per square metre and setting grammes per square metre of current textile
The overfeed ratio of heat setting machine.
Above-mentioned fabrics image acquiring device includes the industrial camera located at fabric face and the infrared light located at envers
Source, the industrial camera and the infrared light supply are both secured on support, and the support is fixed on guide rail, and the support is connected with driving electricity
Machine, the motor are connected with encoder, and the motor and industrial camera are connected with the master controller.
Above-mentioned fabrics sample caliberating device includes the weighing device weighed to fabric sample and to fabric sample
The detection means detected by horizontal close, vertical close numerical value, the weighing device and detection means are connected with the master controller.Weigh
Device can be electronic balance or LOAD CELLS, and detection means can adopt industrial camera.
Phase relation of the real-time control method and system of knitted fabric grammes per square metre first to fabric sample in the thermal finalization of the present invention
Number and density are demarcated, and the close and vertical close numerical computations of real-time horizontal stroke of the fabric obtained in conjunction with detection obtain real-time gram of fabric
Weight, adjusts the overfeed ratio of heat setting machine according to the difference between the real-time grammes per square metre and setting grammes per square metre for obtaining, is capable of achieving to thermal finalization
The real-time control of middle knitted fabric grammes per square metre so that fabric weight is stable in production, improves conforming product rate.
Description of the drawings
Fig. 1 is the structural representation of the textile image acquisition device of the present invention；
Fig. 2 is the module diagram of the real-time control system of knitted fabric grammes per square metre in thermal finalization of the invention.
Specific embodiment
With reference to Fig. 2, in the thermal finalization of the present invention, the real-time control system of knitted fabric grammes per square metre includes master controller 1, fabric figure
As acquisition device 2, fabric sample caliberating device 3, when system works, first by fabric sample caliberating device 3 to fabric sample
Correlation coefficient and density are demarcated, and the real-time horizontal stroke of the fabric obtained in conjunction with the detection of textile image acquisition device 2 is close and vertical close
Numerical computations obtain the real-time grammes per square metre of fabric, according to the difference adjustment heat setting machine between the real-time grammes per square metre and setting grammes per square metre for obtaining
The overfeed ratio of super-feeding device 4, is capable of achieving the real-time control to knitted fabric grammes per square metre in thermal finalization.
With reference to Fig. 1, it is the structural representation of textile image acquisition device, including located at 51 positive industrial camera 52 of fabric
With the infrared light supply 53 located at 51 back side of fabric, industrial camera 52 and infrared light supply 53 be both secured on support 54, and support 54 is solid
On guide rail 55, support 54 is connected with motor, and the motor is connected with encoder, the motor and industrial camera
53 are connected with master controller 1.
Illustrate, in thermal finalization of the present invention, the real-time control method of knitted fabric grammes per square metre, comprises the steps：
Step one, obtains the real time imaging of fabric by industrial camera, the image information for obtaining is carried out by master controller
Process obtains real-time horizontal stroke close and vertical close numerical value α, β of fabric；
Step 2, carries out weighing, carries out horizontal close and vertical close numerical value detection to fabric sample, and send result to main control
Device, to demarcate to the density p of fabric and correlation coefficient λ；
20 groups of samples are taken such as, one of which data are:
m1=180g/100cm2, α1=150/10cm, β1=170/10cm
m2=175g/100cm2, α2=150/10cm, β2=160/10cm,
Data will be obtained and bring formula into：
M=(α+λ β) ρ
The value of 20 groups of λ and ρ can be respectively obtained, method is obtained by minimum variance estimate and is drawn：
λ=0.6404
ρ=0.7875
Step 3, Density ρ and phase that horizontal close, vertical close numerical value α, the β and step 2 obtained according to step one is obtained
Coefficient lambda is closed, real-time grammes per square metre m that formula m=(α+λ β) ρ is calculated current textile is substituted into；
Step 4, adjusts the overfeeding of heat setting machine according to the difference between real-time grammes per square metre m and setting grammes per square metre of current textile
Amount.
The specific embodiment of the present invention is above are only, but the design concept of the present invention is not limited thereto, it is all to utilize this
Design carries out the change of unsubstantiality to the present invention, all should belong to the behavior for invading the scope of the present invention.
Claims (1)
1. in thermal finalization knitted fabric grammes per square metre real-time control system, it is characterised in that include：
Textile image acquisition device, to obtain the real time imaging of fabric, and sends the image information of acquisition to master controller,
By master controller to Image Information Processing with the close and vertical close numerical value of the real-time horizontal stroke for obtaining current textile；The textile image obtains dress
Put including the industrial camera located at fabric face and the infrared light supply located at envers, the industrial camera and the infrared light supply are equal
It is fixed on support, the support is fixed on guide rail, the support is connected with motor, the motor is connected with encoder,
The motor and industrial camera are connected with the master controller；
Fabric sample caliberating device, detects to the sample to current textile, with obtain current textile correlation coefficient and
Density, and send the correlation coefficient of acquisition and density values to master controller；It is right that the fabric sample caliberating device is included
Weighing device that fabric sample is weighed and to fabric sample it is horizontal close, indulge the detection means detected by close numerical value, this claims
Refitting is put and is connected with the master controller with detection means；
Master controller, to the real-time horizontal stroke according to current textile it is close, indulge correlation coefficient and the density of close numerical value and current textile
The real-time grammes per square metre of current textile is calculated, heat is adjusted according to the difference between the real-time grammes per square metre and setting grammes per square metre of current textile fixed
The overfeed ratio of type machine.
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| CN201510176462.3A CN104894793B (en) | 2015-04-15 | 2015-04-15 | Real-time control method of gram weight of knitted fabric in thermoforming and system thereof |
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| CN201510176462.3A CN104894793B (en) | 2015-04-15 | 2015-04-15 | Real-time control method of gram weight of knitted fabric in thermoforming and system thereof |
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| CN104894793B true CN104894793B (en) | 2017-03-22 |
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| CN106337259A (en) * | 2016-10-19 | 2017-01-18 | 浙江理工大学 | Method for estimating real-time temperature of fabric in dry fabric heat-setting process |
| CN106400365A (en) * | 2016-10-19 | 2017-02-15 | 浙江理工大学 | Method for setting speed of setting machine in dry cloth heat setting |
| CN106407602A (en) * | 2016-10-19 | 2017-02-15 | 浙江理工大学 | Estimation and optimization method for real-time temperature of fabric during heat setting process of dry cloth |
| CN106404070B (en) * | 2016-10-28 | 2019-01-08 | 浙江理工大学 | A kind of dyeing machine fabric parameter automatic checkout system based on android |
| CN107192634A (en) * | 2017-05-22 | 2017-09-22 | 绍兴众舟科技有限公司 | A kind of fabric surface density assay method and fabric surface density measurement system |
| CN110968066B (en) * | 2020-01-06 | 2022-10-11 | 常州宏大智能装备产业发展研究院有限公司 | Real-time control method for fabric heat setting density |
| CN111826794B (en) * | 2020-07-15 | 2022-03-25 | 浙江理工大学 | Construction method of plaited padding knitted fabric gram weight prediction model |
| CN112064331B (en) * | 2020-08-11 | 2022-03-29 | 厦门妙杏科技有限公司 | Method for thermally cutting non-woven fabric and non-woven fabric cutting machine |
| CN117490812B (en) * | 2023-12-29 | 2024-04-02 | 常州宏大智慧科技有限公司 | Fabric width-direction gram weight deviation online detection method |
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