Curve approximation control method for cheese dyeing process

Abstract

The invention discloses a curve approximation control method for a cheese dyeing process. The method includes that a water level curve, a feeding curve and a temperature curve are set in a computer which is used for controlling the dyeing process, a program sets a new curve according to a mathematical model and separates the curve into minimum units, the number of the minimum units is automatically stored into a database of the control computer, and a control system controls the water level, the feeding and the temperature according to the number of the minimum units in the database in real time. According to the method, the one time sample finishing rate of the dyeing can be improved effectively and the energy consumption in the dyeing process can be reduced.

Description

technical field [0001] The invention belongs to the technical field of textile printing and dyeing, and in particular relates to a curve approximation control method in cheese dyeing process. Background technique [0002] The dyeing machine is the most important production equipment in the printing and dyeing industry. Its control system mainly controls the water level curve, feeding curve, temperature curve, etc. These factors directly affect the dyeing quality. With the continuous development of the printing and dyeing industry, the requirements for the degree of automatic control of dyeing machines are getting higher and higher. [0003] At present, in the dyeing machine control system of my country's textile printing and dyeing industry, the control method is single and the degree of automation is backward. Most of the printing and dyeing factories still follow the traditional operation mode, such as heating / cooling control using temperature adjustment instruments, wate...

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Problems solved by technology

[0003] At present, in the dyeing machine control system of my country's textile printing and dyeing industry, the control method is single and the degree of automation is backward.

Most printing and dyeing factories still follow the traditional operation mode, such as temperature rise / fall control using temperature regulator instruments, water inlet / drainage using float level switches, and some valves also using manual valves that require manual opening and closing

[0004] The actual investigation found that the traditional dyeing machine has the following problems: the expansion performance, stability and reliability of the single-chip control system such as the temperature regulating instrument are poor, and the temperature requirements of the dyeing process cannot be realized; the float-type water level switch has low accuracy when measuring the water level , the reproducibility is poor, which brings difficulty to the control of bath ratio and water washing; in the enterprise, wages are calculated according to the daily output, and the phenomenon of cutting corners is serious during the dyeing operation process, the product quality fluctuates greatly, and the one-time sample payment rate is low; in actual production, an operator It is necessary to take care of at least two or more dyeing vats at the same time. In the cross-operation, it is often impossible to look at each other from head to tail. Phenomena such as washing water overtime and feeding overtime occur from time to time, resulting in waste of resources; different operators have different operation methods, and it is difficult to achieve standardized operation. , such as feeding control, washing water control, frequency converter speed control in the dyeing process, bath ratio control, etc., resulting in excessive pump speed for flushing hair or destroying yarn, and low pump speed for uneven dyeing; traditional dyeing process The yarn needs to be completely soaked in the liquid for dyeing, which consumes a lot of water

[0005] Generally speaking, traditional control / operation methods waste a lot of resources such as water, electricity, and steam, and cannot strictly implement process standards, so that the quality required for yarn coloring cannot be achieved

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