Dyeing control module, dyeing equipment and dyeing method
Patent Information
- Application Number
- TW114108396
- Authority / Receiving Office
- TW · TW
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-09-16
- Estimated Expiration
- 2045-03-05
AI Technical Summary
Traditional dyeing processes require manual adjustments by experienced workers due to varying dyeing effects on different materials, leading to energy waste, time consumption, manpower inefficiency, and environmental pollution.
A dyeing control module that senses dye solution transmittance using the Beer-Lambert law to adjust heating operations adaptively, controlling the dyeing rate within a predetermined error range, reducing the need for repeated trial dyeing and verification.
This approach enhances dyeing efficiency, reduces waste and emissions, and ensures consistent dyeing quality by dynamically adjusting heating based on real-time transmittance measurements.
Smart Images
Figure TWG2TA001075666_001 
Figure TWG2TA001075666_002 
Figure TWG2TA001075666_003
Abstract
Description
Technical Field
[0001] This invention relates to a dyeing technology, and more particularly to a dyeing control module, dyeing equipment, and dyeing method based on liquid transmittance. Prior Technology
[0002] Traditional dyeing processes utilize a preset temperature trajectory to control the coloring process of the material to be dyed, thereby optimizing the dyeing effect. Please refer to Figure 1, which is a schematic diagram of a temperature trajectory used in a dyeing process. As shown in Figure 1, this temperature trajectory includes: a first heating stage, increasing the temperature from room temperature to 60°C at a rate of 2°C per minute; a first holding stage, maintaining the temperature at 60°C for 10 minutes; a second heating stage, increasing the temperature from room temperature to 110°C at a rate of 1.5°C per minute; a second holding stage, maintaining the temperature at 110°C for 20 minutes; a third heating stage, increasing the temperature from 110°C to 130°C at a rate of 2.5°C per minute; and a third holding stage, maintaining the temperature at 130°C for 30 minutes. Afterwards, the temperature is cooled to room temperature, followed by post-treatment operations such as drainage, water intake, and rinsing.
[0003] However, since the preset temperature trajectory will have different coloring effects on different batches of materials to be dyed or dyeing solutions, traditional dyeing operations require experienced workers with dyeing and finishing expertise to repeatedly adjust the preset temperature trajectory and conduct repeated trial dyeing and verification. This not only wastes energy, time, and manpower, but also increases wastewater and waste materials, thus worsening environmental pollution.
[0004] To address the aforementioned problems, there is an urgent need in this field for a novel staining device and method. Summary of the Invention
[0005] The main objective of this invention is to provide a dyeing control scheme that can obtain the coloring rate by sensing the transmittance of the dye solution during the dyeing process and performing a conversion calculation on the transmittance according to the Beer-Lambert law, thereby knowing the coloring status of the material to be dyed during the dyeing process.
[0006] Another objective of this invention is to provide a dyeing control scheme that can obtain a dyeing rate by means of the derivative of the dyeing rate, and control the dyeing rate within a predetermined error range by means of an adaptive heating operation, so as to solve the problem of slow dyeing in the early stage of the dyeing operation and avoid the uneven dyeing caused by excessively fast dyeing in the later stage of the dyeing operation, thereby shortening the dyeing process and improving the dyeing quality of the material to be dyed.
[0007] Another objective of this invention is to provide a dyeing control solution that avoids the waste of energy, time, and manpower caused by repeated trial dyeing and verification, and also reduces the generation of wastewater, waste materials, and carbon emissions. It is worth mentioning that, to ensure environmental sustainability, blended fabrics made from recycled and virgin fibers are currently available on the market. Because these blended fabrics exhibit significant differences in dyeing characteristics between different batches, when dyeing different batches of blended fabrics according to a fixed temperature trajectory, the differences in dyeing effects are obvious and cannot meet specific color specifications. This inevitably forces manufacturers to repeatedly trial dyeing, verifying, and analyzing different batches of blended fabrics to ensure that the dyed blended fabrics meet specific color specifications, wasting not only energy, time, and manpower, but also significantly increasing wastewater, waste materials, and carbon emissions.
[0008] Another objective of this invention is to provide a dyeing control scheme that can obtain a corresponding temperature trajectory by recording the temperature changes during the adaptive heating operation. Thus, if the transmittance measuring device malfunctions during subsequent dyeing operations, the control unit can still perform a heating operation according to the temperature trajectory to obtain a dyeing rate that is not significantly different from the predetermined dyeing rate.
[0009] To achieve the aforementioned objectives, a dyeing control module is proposed, which is applied in a dyeing device to perform a dyeing operation. The dyeing control module includes a transmittance measuring device and a control unit. The dyeing device includes a dyeing vat, a circulation pipeline, a circulation pump, and a heating device. The dyeing vat is used to contain a material to be dyed and a dye solution. The circulation pipeline is connected to the dyeing vat via the circulation pump. The transmittance measuring device is disposed within the circulation pipeline and is used in conjunction with the control unit to measure the transmittance of the dye solution and convert the transmittance into a digital transmittance signal. The heating device is disposed within the circulation pipeline. The control unit is electrically coupled to the heating device and the transmittance measuring device. The dyeing operation includes: The material to be dyed and the dye solution are placed in the dye vat; Start the circulation pump to circulate the dye solution between the dye tank and the circulation line; and The control unit outputs an electrical control signal to the heating device to perform an adaptive heating operation on the dye solution flowing through the circulation pipeline; The adaptive heating operation includes: the control unit periodically converting the transmittance digital signal into a color rate digital signal according to the Beer-Lambert law, and generating a color rate digital signal based on a derivative value of the color rate digital signal; calculating the difference between the color rate digital signal and a predetermined color rate; and executing a control force calculation program to generate an electrical control signal based on the difference to adjust the heating power of the heating device, thereby controlling the color rate digital signal within the error range of the predetermined color rate.
[0010] In one embodiment, the transmittance is determined by the ratio of the electrical signal value corresponding to the intensity of one transmitted light from the dye solution in the sensing area of the transmittance measuring device to a reference electrical signal value.
[0011] In one embodiment, the circulation pipeline has a temperature sensing unit to sense the temperature of the dye solution, and the adaptive heating operation further includes: the control unit executing a temperature control program when the temperature reaches a threshold, wherein the temperature control program is to fix the temperature approximately at the threshold by controlling the heating power.
[0012] In one embodiment, the control unit has a memory to store a temperature trajectory during the adaptive heating operation.
[0013] To achieve the aforementioned objectives, the present invention further proposes a dyeing apparatus for performing a dyeing operation, comprising a dyeing vat, a circulation pipeline, a circulation pump, a heating device, and a control module. The dyeing control module includes a transmittance measuring device and a control unit. The dyeing vat is used to contain a material to be dyed and a dye solution. The circulation pipeline is connected to the dyeing vat via the circulation pump. The transmittance measuring device is disposed within the circulation pipeline and, in conjunction with the control unit, measures the transmittance of the dye solution and converts the transmittance into a digital transmittance signal. The heating device is disposed within the circulation pipeline. The control unit is electrically coupled to the heating device and the transmittance measuring device. The dyeing operation includes: The material to be dyed and the dye solution are placed in the dye vat; Start the circulation pump to circulate the dye solution between the dye tank and the circulation line; and The control unit outputs an electrical control signal to the heating device to perform an adaptive heating operation on the dye solution flowing through the circulation pipeline; The adaptive heating operation includes: the control unit periodically converting the transmittance digital signal into a color rate digital signal according to the Beer-Lambert law, and generating a color rate digital signal based on a derivative value of the color rate digital signal; calculating the difference between the color rate digital signal and a predetermined color rate; and executing a control force calculation program to generate an electrical control signal based on the difference to adjust the heating power of the heating device, thereby controlling the color rate digital signal within the error range of the predetermined color rate.
[0014] In one embodiment, the transmittance is determined by the ratio of the electrical signal value corresponding to the intensity of one transmitted light from the dye solution in the sensing area of the transmittance measuring device to a reference electrical signal value.
[0015] In one embodiment, the circulation pipeline has a temperature sensing unit to sense the temperature of the dye solution; the adaptive heating operation further includes: the control unit executing a temperature control program when the temperature reaches a threshold, wherein the temperature control program is to fix the temperature approximately at the threshold by controlling the heating power; and the control unit has a memory to store a temperature trajectory during the adaptive heating operation.
[0016] To achieve the aforementioned objectives, the present invention further proposes a dyeing method, which is implemented by a dyeing device comprising a dyeing vat, a circulation pipeline, a circulation pump, a heating device, and a control module. The dyeing control module comprises a transmittance measuring device and a control unit. The dyeing vat is used to contain a material to be dyed and a dye solution; the circulation pipeline is connected to the dyeing vat via the circulation pump; the transmittance measuring device is disposed within the circulation pipeline and is used in conjunction with the control unit to measure the transmittance of the dye solution and convert the transmittance into a digital transmittance signal; the heating device is disposed within the circulation pipeline; the control unit is electrically coupled to the heating device and the transmittance measuring device; and the dyeing method includes: The material to be dyed and the dye solution are placed in the dye vat; Start the circulation pump to circulate the dye solution between the dye tank and the circulation line; and The control unit outputs an electrical control signal to the heating device to perform an adaptive heating operation on the dye solution flowing through the circulation pipeline; The adaptive heating operation includes: the control unit periodically converting the transmittance digital signal into a color rate digital signal according to the Beer-Lambert law, and generating a color rate digital signal based on a derivative value of the color rate digital signal; calculating the difference between the color rate digital signal and a predetermined color rate; and executing a control force calculation program to generate an electrical control signal based on the difference to adjust the heating power of the heating device, thereby controlling the color rate digital signal within the error range of the predetermined color rate.
[0017] In one embodiment, the transmittance is determined by the ratio of the electrical signal value corresponding to the intensity of one transmitted light from the dye solution in the sensing area of the transmittance measuring device to a reference electrical signal value.
[0018] In one embodiment, the circulation pipeline has a temperature sensing unit to sense the temperature of the dye solution; the adaptive heating operation further includes: the control unit executing a temperature control program when the temperature reaches a threshold, wherein the temperature control program is to fix the temperature approximately at the threshold by controlling the heating power; and the control unit has a memory to store a temperature trajectory during the adaptive heating operation.
[0019] To enable your review committee to further understand the structure, features, purpose, and advantages of this invention, detailed descriptions of the preferred embodiments are attached below with accompanying drawings. Simple Explanation of the Diagram
[0020] Figure 1 is a schematic diagram of a temperature trajectory used in a dyeing operation; Figure 2 is a schematic diagram of one embodiment of the dyeing device based on liquid transmittance according to the present invention; Figure 3 illustrates a flowchart of one embodiment of the staining method based on liquid transmittance of the present invention; Figure 4 is a schematic diagram of a measurement result obtained when the dyeing equipment of the present invention performs a dyeing operation according to a known temperature trajectory; Figure 5 is a schematic diagram of the measurement results of a dyeing operation performed according to the dyeing method of the present invention; and Figure 6 is a comparison curve of the measurement results shown in Figures 4 and 5. Implementation
[0021] The principle of this invention is as follows:
[0022] 1. The transmittance of a dye solution is positively correlated with its color uptake on a material to be dyed. According to Beer-Lambert law, when a beam of incident light passes through an absorbing medium of a certain thickness, the intensity of the transmitted light decreases because the medium absorbs some of the light energy. The higher the concentration of the absorbing medium, the weaker the intensity of the transmitted light. This relationship can be expressed as follows: Where A represents absorbance, It represents the intensity of transmitted light, I0 represents the intensity of incident light, T represents transmittance, K represents the absorption coefficient, d represents the thickness of the absorbing medium, and c represents the concentration of the absorbing medium. In the dyeing process of this invention, the dye in the dye bath is the absorbing medium. The higher the color uptake rate of the material to be dyed, the lower the concentration of the dye in the dye bath, that is, the smaller c is, the smaller A is, and the larger the transmittance T is. Accordingly, this invention can calculate the color uptake rate from the transmittance.
[0023] 2. The dyeing rate of the dye solution on one of the materials to be dyed can be obtained by differentiating the dyeing rate of the material to be dyed.
[0024] 3. By performing an adaptive heating operation, the coloring rate is approximately controlled at a preset rate; and
[0025] 4. By recording the temperature changes during the adaptive heating operation, a corresponding temperature trajectory can be obtained. Thus, if the transmittance measuring device malfunctions during subsequent dyeing operations, the control unit can still perform a heating operation according to the temperature trajectory to obtain a coloring rate that is not much different from the preset rate.
[0026] Therefore, this invention can avoid the waste of energy, time and manpower caused by repeated dyeing and verification, and can also reduce the generation of wastewater, waste materials and carbon emissions.
[0027] Please refer to Figure 2, which is a schematic diagram of an embodiment of the dyeing equipment based on liquid transmittance of the present invention. As shown in Figure 2, a dyeing equipment 100 is used to perform a dyeing operation and includes a dyeing vat 110, a circulation pipeline 111, a circulation pump 112, a heating device 120, a temperature sensing unit 130, and a control module 140, wherein the control module 140 includes a transmittance measuring device 141 and a control unit 142.
[0028] The dyeing vat 110 is equipped with an active roller 110a and contains a material to be dyed 10 and a dye solution 20. The active roller 110a is used to make the material to be dyed 10 circulate and move inside the dyeing vat 110 so that all parts of the material to be dyed 10 have a consistent dyeing effect.
[0029] The circulation line 111 is connected to the dyeing tank 110 via the circulation pump 112, and the circulation pump 112 is used to circulate the dye liquor 20 between the dyeing tank 110 and the circulation line 111.
[0030] Heating device 120 and temperature sensing unit 130 are both disposed in circulation pipeline 111. Heating device 120 is used to adjust heating power according to an electrical control signal CH to heat dye solution 20 in circulation pipeline 111. Temperature sensing unit 130 is used to sense the temperature of dye solution 20 in circulation pipeline 111 and output a temperature signal D TEMP corresponding to the temperature.
[0031] The transmittance measuring device 141 is installed in the circulation pipeline 111 and is used in conjunction with the control unit 142 to measure the transmittance of the dye liquor 20 and convert the transmittance into a transmittance digital signal. The transmittance digital signal is determined by the ratio of the electrical signal value corresponding to the light intensity of one of the transmitted light from the dye liquor 20 in the sensing area of the transmittance measuring device 141 to a reference electrical signal value. The control unit 142 may be a microprocessor or microcontroller, which is electrically coupled to the heating device 120, the temperature sensing unit 130 and the transmittance measuring device 141, and executes a program to perform an adaptive heating operation based on the transmittance digital signal and the temperature signal DTEMP to adaptively adjust the value of the electrical control signal CH.
[0032] In detail, the staining process includes:
[0033] (a) Place the material to be dyed 10 and the dye solution 20 into the dyeing vat 110;
[0034] (ii) Start the circulation pump 112 to circulate the dye solution 20 between the dyeing tank 110 and the circulation pipeline 111; and
[0035] (iii) The control unit 142 outputs an electrical control signal CH to the heating device 120 to perform an adaptive heating operation on the dye solution 20 flowing through the circulation pipeline 111; wherein, the adaptive heating operation includes:
[0036] 1. The control unit 142 periodically converts the transmittance digital signal into a color rate digital signal according to the Beer-Lambert law, and generates a color rate digital signal based on a derivative value of the color rate digital signal;
[0037] 2. The control unit 142 calculates the difference between the digital signal of the coloring rate and one of the predetermined coloring rates;
[0038] 3. The control unit 142 executes a control force calculation program to generate an electrical control signal CH based on the difference to adjust the heating power of the heating device 120, thereby controlling the digital signal of the coloring rate within an error range of the predetermined coloring rate. The control force calculation program may include a proportional control force calculation, an integral control force calculation, a proportional-integral control force calculation, a proportional-derivative control force calculation, or a proportional-integral-derivative control force calculation, or other equivalent or alternative control force calculations.
[0039] 4. The control unit 142 executes a constant temperature control program when the value of the temperature signal D TEMP reaches a threshold. The constant temperature control program maintains the temperature at approximately the threshold for a period of time by controlling the heating power. For example, assuming the threshold is 130 degrees Celsius and the time period is 30 minutes, the constant temperature control program will maintain the temperature at approximately 130 degrees Celsius for 30 minutes.
[0040] Additionally, the control unit 142 may have a memory to store a trace of the temperature signal D TEMP during the adaptive heating operation.
[0041] As described above, this invention discloses a dyeing method. Referring to Figure 3, which illustrates a flowchart of one embodiment of the dyeing method of this invention, the method is implemented using a dyeing apparatus. This apparatus includes a dyeing vat, a circulation pipeline, a circulation pump, a heating device, and a control module. The dyeing control module includes a transmittance measuring device and a control unit. The dyeing vat is used to contain a material to be dyed and a dye solution. The circulation pipeline is connected to the dyeing vat via the circulation pump. The transmittance measuring device is disposed within the circulation pipeline and, together with the control unit, measures the transmittance of the dye solution and converts the transmittance into a digital transmittance signal. The heating device is disposed within the circulation pipeline. The control unit is electrically coupled to the heating device and the transmittance measuring device. As shown in Figure 3, the method includes: placing the material to be dyed and the dye solution in the dyeing tank (step a); starting the circulation pump to circulate the dye solution between the dyeing tank and the circulation pipeline (step b); and the control unit outputting an electrical control signal to the heating device to perform an adaptive heating operation on the dye solution flowing through the circulation pipeline (step c).
[0042] In step c, the adaptive heating operation includes: the control unit periodically converting the transmittance digital signal into a color rate digital signal according to the Beer-Lambert law, and generating a color rate digital signal based on a derivative value of the color rate digital signal; calculating the difference between the color rate digital signal and a predetermined color rate; and executing a control force calculation program to generate an electrical control signal based on the difference to adjust the heating power of the heating device, thereby controlling the color rate digital signal within the error range of the predetermined color rate.
[0043] In addition, the transmittance is determined by the ratio of the electrical signal value corresponding to the intensity of one of the transmitted light rays of the dye solution in the sensing area of the transmittance measuring device to a reference electrical signal value.
[0044] In addition, the circulation pipeline has a temperature sensing unit to sense the temperature of the dye solution; the adaptive heating operation further includes: the control unit executes a temperature control program when the temperature reaches a threshold, wherein the temperature control program is to fix the temperature approximately at the threshold by controlling the heating power; and the control unit has a memory to store a temperature trajectory during the adaptive heating operation.
[0045] Additionally, please refer to Figure 4, which is a schematic diagram of a measurement result obtained when the dyeing equipment of the present invention performs a dyeing operation according to a conventional temperature trajectory. As shown in Figure 4, according to the conventional temperature trajectory, the dyeing operation has the problem of a slow dyeing rate (less than 0.5% per minute) in the first 50 minutes, and a problem of a fast dyeing rate (more than 1.5% per minute) between 80 and 100 minutes. The fast dyeing rate will cause uneven dyeing of the material to be dyed.
[0046] Additionally, please refer to Figure 5, which is a schematic diagram of the measurement results of a dyeing operation performed according to the dyeing method of the present invention. As shown in Figure 5, the dyeing rate was higher than 0.5% per minute in the initial 12 minutes of the dyeing operation, and no phenomenon of excessively fast dyeing rate (higher than 1.5% per minute) occurred throughout the entire dyeing operation.
[0047] In addition, to further highlight the difference in effectiveness between the present invention and the prior art, the specification of this case combines the measurement results shown in Figures 4 and 5 into the curve graph shown in Figure 6.
[0048] Based on the above design, the present invention has the following advantages:
[0049] 1. By sensing the transmittance of the dye liquor during the dyeing process and performing a conversion calculation on the transmittance according to the Beer-Lambert law, the color uptake rate can be obtained, thereby revealing the color uptake status of the material to be dyed during the dyeing process;
[0050] Second, a coloring rate can be obtained by the difference between two adjacent sampling points, and an adaptive heating operation can be used to control the coloring rate within a predetermined error range. This solves the problem of slow coloring in the early stage of the dyeing process and avoids uneven dyeing caused by excessively fast coloring in the later stage of the dyeing process, thereby shortening the dyeing process and improving the dyeing quality of the material to be dyed.
[0051] Third, it can avoid the waste of energy, time, and manpower caused by repeated dyeing and verification, and can also reduce the generation of wastewater, waste materials, and carbon emissions; and
[0052] Fourth, a corresponding temperature trajectory can be obtained by recording the temperature changes during the adaptive heating operation. Thus, if the transmittance measuring device malfunctions during subsequent dyeing operations, the control unit can still perform a heating operation according to the temperature trajectory to obtain a dyeing rate that is not much different from the predetermined dyeing rate.
[0053] The present invention discloses one of the preferred embodiments. Any partial changes or modifications that originate from the technical concept of the present invention and are easily deduced by those skilled in the art are not outside the scope of the patent rights of the present invention.
[0054] 10: Materials to be dyed 20: Dye solution 100: Dyeing equipment 110: Dyeing vat 110a: Active roller 111: Circulation pipeline 112: Circulating pump 120: Heating device 130: Temperature sensing unit 140: Control Module 141: Transmittance measuring device 142: Control Unit Step a: Place the material to be dyed and the dye solution into the dye vat. Step b: Start the circulation pump to circulate the dye solution between the dye tank and the circulation pipeline. Step c: The control unit outputs an electrical control signal to the heating device to perform an adaptive heating operation on the dye solution flowing through the circulation pipeline.
Claims
1. A dyeing control module, used in a dyeing apparatus to perform a dyeing operation, the dyeing control module comprising a transmittance measuring device and a control unit, the dyeing apparatus comprising a dyeing vat, a circulation pipeline, a circulation pump and a heating device, wherein, The dyeing vat is used to hold a material to be dyed and a dye solution; the circulation pipeline is connected to the dyeing vat via the circulation pump; the transmittance measuring device is installed in the circulation pipeline and is used in conjunction with the control unit to measure the transmittance of the dye solution and convert the transmittance into a transmittance digital signal; the heating device is installed in the circulation pipeline. The control unit is electrically coupled to the heating device and the transmittance measuring device; and the dyeing operation includes: placing the material to be dyed and the dye solution in the dyeing tank; starting the circulation pump to circulate the dye solution between the dyeing tank and the circulation pipeline; and the control unit outputting an electrical control signal to the heating device to perform an adaptive heating operation on the dye solution flowing through the circulation pipeline; wherein, the adaptive heating operation includes: the control unit periodically converting the transmittance digital signal into a color rate digital signal according to the Beer-Lambert law, and generating a color rate digital signal according to a derivative value of the color rate digital signal; calculating the difference between the color rate digital signal and a predetermined color rate; and executing a control force calculation program to generate an electrical control signal according to the difference to adjust the heating power of the heating device, thereby controlling the color rate digital signal within the error range of the predetermined color rate.
2. The dyeing control module as described in claim 1, wherein the transmittance is determined by the ratio of the electrical signal value corresponding to the intensity of one transmitted light of the dye solution in the sensing area of the transmittance measuring device to a reference electrical signal value.
3. The dyeing control module as described in claim 1, wherein the circulation pipeline includes a temperature sensing unit to sense a temperature of the dye solution, and the adaptive heating operation further includes: When the temperature reaches a threshold, the control unit executes a temperature control program, wherein the temperature is approximately fixed at the threshold by controlling the heating power.
4. The dyeing control module as described in claim 3, wherein the control unit has a memory for storing a trajectory of the temperature during the adaptive heating operation.
5. A dyeing apparatus for performing a dyeing operation, comprising a dyeing vat, a circulation pipeline, a circulation pump, a heating device, and a control module, wherein the dyeing control module includes a transmittance measuring device and a control unit, wherein, The dyeing vat is used to hold a material to be dyed and a dye solution; the circulation pipeline is connected to the dyeing vat via the circulation pump; the transmittance measuring device is installed in the circulation pipeline and is used in conjunction with the control unit to measure the transmittance of the dye solution and convert the transmittance into a transmittance digital signal; the heating device is installed in the circulation pipeline. The control unit is electrically coupled to the heating device and the transmittance measuring device; and the dyeing operation includes: placing the material to be dyed and the dye solution in the dyeing tank; starting the circulation pump to circulate the dye solution between the dyeing tank and the circulation pipeline; and the control unit outputting an electrical control signal to the heating device to perform an adaptive heating operation on the dye solution flowing through the circulation pipeline; wherein, the adaptive heating operation includes: the control unit periodically converting the transmittance digital signal into a color rate digital signal according to the Beer-Lambert law, and generating a color rate digital signal according to a derivative value of the color rate digital signal; calculating the difference between the color rate digital signal and a predetermined color rate; and executing a control force calculation program to generate an electrical control signal according to the difference to adjust the heating power of the heating device, thereby controlling the color rate digital signal within the error range of the predetermined color rate.
6. The dyeing apparatus as described in claim 5, wherein the transmittance is determined by the ratio of the electrical signal value corresponding to the intensity of one transmitted light of the dye solution in the sensing area of the transmittance measuring device to a reference electrical signal value.
7. The dyeing apparatus as described in claim 5, wherein, The circulation pipeline has a temperature sensing unit to sense the temperature of one of the dye solutions; The adaptive heating operation further includes: the control unit executing a temperature control program when the temperature reaches a threshold, wherein the temperature control program fixes the temperature approximately at the threshold by controlling the heating power; and the control unit has a memory to store a trajectory of the temperature during the adaptive heating operation.
8. A dyeing method, implemented by a dyeing apparatus, the dyeing apparatus comprising a dyeing vat, a circulation pipeline, a circulation pump, a heating device, and a control module, the dyeing control module comprising a transmittance measuring device and a control unit, wherein, The dyeing vat is used to hold a material to be dyed and a dye solution; the circulation pipeline is connected to the dyeing vat via the circulation pump; the transmittance measuring device is installed in the circulation pipeline and is used in conjunction with the control unit to measure the transmittance of the dye solution and convert the transmittance into a transmittance digital signal; the heating device is installed in the circulation pipeline. The control unit is electrically coupled to the heating device and the transmittance measuring device; and the dyeing method includes: placing the material to be dyed and the dye solution in the dyeing tank; starting the circulation pump to circulate the dye solution between the dyeing tank and the circulation pipeline; and the control unit outputting an electrical control signal to the heating device to perform an adaptive heating operation on the dye solution flowing through the circulation pipeline; wherein the adaptive heating operation includes: the control unit periodically converting the transmittance digital signal into a color rate digital signal according to the Beer-Lambert law, and generating a color rate digital signal according to a derivative value of the color rate digital signal; calculating the difference between the color rate digital signal and a predetermined color rate; and executing a control force calculation program to generate an electrical control signal according to the difference to adjust the heating power of the heating device, thereby controlling the color rate digital signal within the error range of the predetermined color rate.
9. The dyeing method as described in claim 8, wherein the transmittance is determined by the ratio of the electrical signal value corresponding to the intensity of one transmitted light of the dye solution in the sensing area of the transmittance measuring device to a reference electrical signal value.
10. The dyeing method as described in claim 8, wherein, The circulation pipeline has a temperature sensing unit to sense the temperature of one of the dye solutions; The adaptive heating operation further includes: the control unit executing a temperature control program when the temperature reaches a threshold, wherein the temperature control program fixes the temperature approximately at the threshold by controlling the heating power; and the control unit has a memory to store a trajectory of the temperature during the adaptive heating operation.