A method and apparatus for controlling the temperature of a food material during rolling

Abstract

The application relates to the technical field of soaking control, and discloses a constant-temperature soaking control method and device for rolled food materials. The method is based on a soaking plate above the liquid surface in a soaking pool, a first temperature sensor is used to acquire the soaking liquid temperature, the heating power is adjusted according to the positive correlation of the temperature difference ratio, and the constant temperature is accurately maintained. The driving device is controlled by a starting instruction to first soak the soaking plate, then the soaking material is moved to the plate and soaked, and the soaking is completed according to a first time length and a second time length, and subsequent rolling is directly performed on the soaking plate. The method solves the problems of water temperature fluctuation and inconsistent time in manual soaking, avoids uneven softening, fracture or toughness loss of the material, simplifies the processing flow, and significantly improves the soaking quality, processing efficiency and consistency of the finished product quality. The device executes the above method and is suitable for applications in the fields of families, catering and prepared dishes.

Description

Technical Field

[0001] This application relates to the technical field of soaking control, and in particular to a method and apparatus for controlling the constant temperature soaking of rolled food materials. Background Technology

[0002] The low-fat shrimp and crab stick Vietnamese roll sandwich uses Vietnamese spring roll wrappers. Vietnamese spring roll wrappers are a type of rolled food material made primarily from rice flour and tapioca starch, through processes such as grinding, pulping, spreading, steaming, and drying. They are thin yet resilient, highly transparent, and have a natural rice aroma. After rolling, they can be eaten raw or briefly heated, and are widely used in family meals, catering businesses, and ready-to-eat meals. Vietnamese spring roll wrappers need to be soaked before use, and this soaking must be done at a constant temperature. Dry spring roll wrappers are brittle and hard, and if used directly, they are prone to cracking and cannot be rolled. Soaking temperature is a key factor; too low a temperature will result in slow and uneven softening, making them prone to breakage during rolling; too high a temperature will cause the wrappers to soften excessively, losing their elasticity and becoming difficult to shape. Currently, the soaking process for Vietnamese spring roll wrappers is generally done manually. Operators first need to add an appropriate amount of water to a container and then measure the water temperature with a thermometer. If the water temperature does not meet the requirements, hot or cold water needs to be added manually for adjustment. During the adjustment process, the water temperature is prone to fluctuations, which greatly interferes with the soaking process, making it difficult to stabilize the soaking temperature within a suitable range. In addition, the manual soaking time is determined by experience, and the soaking time is inconsistent each time, so the soaking effect needs to be improved. Summary of the Invention

[0003] To improve the soaking effect of Vietnamese spring roll products, this application provides a method and apparatus for controlling the constant temperature soaking of rolled food materials.

[0004] In a first aspect, this application provides a method for controlling the constant temperature soaking of rolled food materials, employing the following technical solution: A method for controlling the constant temperature soaking of rolled food materials includes the following steps: Based on the soaking plate for placing the soaking material, the soaking plate is located above the surface of the soaking liquid in the soaking tank, and the soaking tank is equipped with a driving device that makes the surface of the soaking plate covered with the soaking liquid. The temperature of the soaking solution is obtained by a first temperature sensor installed in the soaking tank. If the liquid temperature is less than the preset soaking temperature, the soaking solution is heated. The difference between the liquid temperature and the soaking temperature is calculated as the temperature difference. The temperature difference ratio is calculated based on the temperature difference and the preset reference difference. The heating power is controlled according to the positive correlation of the temperature difference ratio. Otherwise, the heating power is set to zero. Based on a preset start command, the drive device starts working to immerse the soaking plate. The drive device stops working and resets, moving the soaking material onto the soaking plate. After the heating power is set to zero, the drive device is started to allow the soaking liquid to wet the surface of the soaking material. After soaking for a preset first duration, the drive device stops working and resets, ensuring that the soaking material is continuously soaked for at least a preset second duration, wherein the first duration is included within the second duration. Complete the rolling operation of the soaking material on the soaking plate.

[0005] By adopting the above technical solution, this constant temperature soaking control method monitors the temperature of the soaking solution in real time through a temperature sensor and dynamically adjusts the heating power based on the temperature difference ratio to accurately maintain a constant temperature in the soaking solution. This effectively avoids problems such as uneven softening and easy breakage caused by excessively low temperatures, and excessive softening and loss of toughness caused by excessively high temperatures. By using a drive device to orderly control the soaking process between the soaking plate and the soaking material, and with preset first and second soaking cycles, it solves the drawbacks of large water temperature fluctuations and inconsistent soaking times during manual soaking, ensuring that the softening effect of the soaking material is uniform and stable, and the toughness is appropriate. At the same time, after soaking, rolling operations can be performed directly on the soaking plate, simplifying the processing flow and significantly improving the soaking quality and subsequent processing efficiency of rolled food materials.

[0006] Optionally, the method further includes the following steps: The timer starts after soaking and ends when the rolling operation begins, thus recording the waiting time. If the waiting time exceeds the preset warning time, an immersion abnormality warning will be issued; Calculate the average of multiple waiting times, calculate the warning ratio based on the average and the warning duration, and adjust the second duration according to the negative correlation of the warning ratio.

[0007] By adopting the above technical solutions, problems such as water loss and drying out, excessive water absorption and loss of toughness in the rolled food materials after soaking are effectively avoided due to prolonged storage, ensuring the adaptability of the materials for subsequent rolling. At the same time, by calculating the average of multiple waiting times and adjusting the second time in combination with the negative correlation of the warning ratio, the rolling rhythm differences in actual processing can be dynamically adapted, the total soaking time can be flexibly optimized, and the impact of inconsistent waiting times between different batches on the soaking effect can be compensated.

[0008] Optionally, the method further includes the following steps: A second temperature sensor is installed on the soaking plate. In response to the start command, the second temperature sensor is controlled to collect the temperature on the soaking plate and generate a plate temperature value. If the plate temperature value is lower than the soaking temperature value, the drive device is controlled to start working so that the soaking liquid wets the soaking plate. The difference between the soaking temperature and the plate temperature is calculated as the plate temperature difference. The plate temperature ratio is calculated based on the plate temperature difference and the preset set difference. The soaking time in the soaking step is adjusted according to the plate temperature ratio, or the control coefficient for controlling the heating power based on the temperature difference ratio is adjusted according to the plate temperature ratio.

[0009] By adopting the above technical solution, uneven softening of local areas of the rolled food material in contact with the board due to temperature differences between the board and the soaking liquid can be avoided, ensuring the consistency of the overall softening effect of the material. At the same time, by calculating the board temperature ratio by comparing the board temperature difference with the set difference, the soaking time or heating power control coefficient can be dynamically adjusted. This can accurately adapt to the temperature fluctuations of the board, specifically compensate for the impact of temperature deviation on the soaking effect, further optimize the accuracy of constant temperature soaking, and make the softening degree of the rolled food material more uniform and the toughness more suitable.

[0010] Optionally, the soaking plate is fixed in the soaking tank. The driving device includes a pumping component. A water inlet is provided at the bottom of the soaking tank, and a water outlet is provided on the side wall of the soaking tank, which is aligned with the soaking plate. The pumping component draws the soaking liquid from the water inlet and sprays it onto the soaking plate at the water outlet. The driving device also includes a spraying component, which is set above the soaking tank and aligned with the soaking plate. The water inlet of the spraying component is connected to the water outlet of the pumping component. The spraying pressure or spray diameter of the spraying component is adjusted according to the negative correlation of the plate temperature ratio. Alternatively, the position of the soaking plate can be raised and lowered within the soaking tank. The driving device includes a lifting assembly connected between the soaking tank and the soaking plate. When the lifting assembly drives the soaking plate to its lowest position within the soaking tank, the soaking plate is below the surface of the soaking liquid. When the lifting assembly drives the soaking plate to its highest position within the soaking tank, the soaking plate is above the surface of the soaking liquid. The lowest position of the soaking plate within the soaking tank can be adjusted positively according to a second duration, or the operating speed of the lifting assembly can be adjusted negatively according to a second duration.

[0011] By adopting the above technical solutions, firstly, the soaking liquid is circulated through a pumping component and precisely sprayed onto the soaking plate through the outlet. Combined with a spraying component, the spray pressure or nozzle diameter is dynamically adjusted according to the plate temperature ratio, which can specifically adapt to the temperature differences of the plate body, making the soaking plate and material more evenly and accurately soaked. Secondly, the soaking plate is driven to rise and fall by a lifting component. Combined with a second time period, the lowest position of the soaking plate or the speed of the lifting action can be flexibly adjusted. The soaking depth and soaking rhythm of the material can be precisely controlled according to the soaking requirements. Both designs can adapt to different processing scenarios and soaking requirements, further improving the controllability and flexibility of constant temperature soaking, ensuring that the rolled food materials soften evenly and meet the toughness standards, while optimizing the utilization efficiency and processing adaptability of the soaking liquid, providing a more comprehensive guarantee for subsequent rolling operations and the stability of finished product quality.

[0012] Optionally, the step of heating the soaking solution may further include the following sub-steps: The ratio of the soaking temperature to the liquid temperature is calculated as the temperature ratio. If the temperature ratio is greater than the preset force ratio, the drive device is activated, and the drive power of the drive device is adjusted according to the positive correlation of the temperature ratio. If the drive unit includes a pumping component, the pumping flow rate is positively correlated with the drive power; if the drive unit includes a lifting component, the lifting frequency or lifting speed is positively correlated with the drive power.

[0013] By adopting the above technical solution, during the soaking liquid heating stage, the temperature ratio is calculated and compared with the force ratio. When the temperature difference is large, the drive device is automatically activated, and the drive power is positively correlated with the temperature ratio. The pumping flow rate and lifting frequency or speed are adjusted for the pumping component and lifting component, respectively, which can accelerate the circulation of the soaking liquid or the contact frequency between the soaking plate and the soaking liquid, allowing the heat to spread quickly and evenly, avoiding temperature imbalance caused by local heating. At the same time, it is compatible with two different types of drive devices, enhancing the versatility of the solution. This not only speeds up the soaking liquid reaching the preset temperature, but also further ensures the stability and uniformity of the heating process, providing a more efficient temperature guarantee for the subsequent uniform softening and maintenance of suitable toughness of rolled food materials, further improving the reliability of the soaking effect and processing efficiency.

[0014] Optionally, the method further includes the following steps: A photoelectric detection module is installed on the soaking plate. The photoelectric detection module is used to collect the light transmittance of the soaking material and generate a light transmittance value. After the soaking material is soaked and before rolling, the latest light transmittance value is obtained. If the light transmittance value is less than the preset light transmittance reference value, the rolling is delayed, and the ratio of the light transmittance reference value to the light transmittance value is calculated as the light transmittance ratio value. The second time is adjusted according to the positive correlation of the light transmittance ratio value.

[0015] By adopting the above technical solution, a photoelectric detection module is set on the soaking plate to collect the light transmittance of the soaking material and generate a light transmittance value. The light transmittance directly reflects the degree of softening of the material, avoiding the problem of insufficient softening of individual materials that may be caused by relying solely on temperature and time control. When the light transmittance value is lower than the preset reference value, the material is soaked again after a delay in rolling and the second time is adjusted according to the positive correlation of the light transmittance ratio. This ensures that each piece of rolled food material reaches the appropriate softening state. This further improves the accuracy and personalized adaptability of the soaking effect, effectively avoiding problems such as rolling breakage and forming difficulties caused by uneven or insufficient softening of materials. It provides a more comprehensive guarantee for the uniformity and stability of the finished product quality, while reducing material waste.

[0016] Optionally, the method further includes the following steps: For a set number of soaking times, calculate the trend values ​​of multiple transmittance values, and adjust the first duration according to the positive correlation of the trend values; where the transmittance value gradually increases, the trend value is negative, and the transmittance value gradually decreases, the trend value is positive.

[0017] By adopting the above technical solution, the softening characteristics of materials can be dynamically adapted to batch differences or changes in softening characteristics during multiple soaking processes; when the material softening speed is accelerated, the first time duration is shortened to avoid over-softening; when the softening speed is slowed down, the first time duration is extended to ensure sufficient softening.

[0018] Optionally, an image detection module aligned with the soaking plate is provided next to the soaking tank. The image detection module is used to capture an image on the soaking plate, extract the soaking material, and generate a soaking image. After the soaking material is soaked and before rolling, the latest soaking image is acquired, and the difference between the soaking image and the preset template image is calculated; where the template image is a standard image of the soaked material after soaking. If the difference value is greater than the preset difference reference value, the winding is delayed, and the ratio of the difference value to the difference reference value is calculated as the difference ratio. The second duration is adjusted according to the positive correlation of the difference ratio.

[0019] By adopting the above technical solution, an image detection module is set up next to the soaking tank to capture images of the soaking material on the soaking plate and generate soaking images. The difference value is calculated with a preset standard template image, and the actual soaking effect of the material is accurately judged in a visual way, which makes up for the limitations of relying solely on temperature, time or light transmittance detection. When the difference value exceeds the reference value, the material that does not meet the standard can be soaked again by delaying the rolling and adjusting the second time according to the positive correlation of the difference ratio. This effectively avoids rolling failure or finished product quality defects caused by uneven softening or abnormal shape.

[0020] Optionally, the method further includes the following steps: For a set number of soaking times, calculate the difference trend value of multiple corresponding difference values, and adjust the first duration according to the positive correlation of the difference trend value; where the difference value gradually increases, the difference trend value is positive, and the difference value gradually decreases, the difference trend value is negative.

[0021] By adopting the above technical solution, the batch dynamic changes of the soaking effect of rolled food materials are accurately captured by calculating the difference trend value of multiple difference values ​​after setting the number of soaking times. Based on this, the first time is positively adjusted to form a dynamic negative feedback adjustment mechanism driven by image recognition. When the difference trend value is positive, the first time is extended to enhance the soaking effect. When the difference trend value is negative, the first time is reasonably optimized to avoid over-soaking, effectively adapting to the fluctuation of material batch characteristics or subtle changes in the processing environment.

[0022] Secondly, this application provides a constant temperature soaking control device for rolled food materials, which adopts the following technical solution: A constant temperature soaking control device for rolled food materials includes a processor, wherein the processor performs the steps of the constant temperature soaking control method for rolled food materials as described in any one of the above claims.

[0023] In summary, this application includes at least one of the following beneficial technical effects: By using a temperature sensor to monitor in real time and dynamically adjust the heating power based on the temperature difference ratio, precise control of the soaking solution temperature is achieved, fundamentally solving the problems of large temperature fluctuations, uneven softening, or over-softening in traditional manual soaking; Combined with a multi-dimensional detection mechanism and dynamic closed-loop adjustment logic, it accurately judges the soaking status of a single batch of materials through light transmittance and image detection and provides targeted re-soaking, while trend value analysis adapts to batch differences in materials and changes in the processing environment, dynamically optimizing the soaking time and driving parameters to ensure that each piece of material reaches the standard state of uniform softening and suitable toughness; At the same time, it provides two driving device designs adapted to different scenarios, taking into account both the uniformity of wetting and processing flexibility, and can be directly rolled on the soaking plate after soaking, simplifying the processing process and effectively reducing material waste and rolling failure rate. Attached Figure Description

[0024] Figure 1 This is a step diagram of a method for controlling the constant temperature soaking of rolled food materials.

[0025] Figure 2 This is a schematic diagram of a constant-temperature soaking device for rolled food materials, using a pumping component.

[0026] Figure 3 This is a schematic diagram of a constant temperature soaking device for rolled food materials, using a lifting assembly.

[0027] Reference numerals: 1. Immersion tank; 2. Immersion plate; 3. Pumping assembly; 4. Immersion material; 5. Lifting assembly; 6. Spraying assembly. Detailed Implementation

[0028] The embodiments of this application are described in detail below, and examples of the embodiments are shown in the accompanying drawings.

[0029] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] This application discloses a method for controlling the constant temperature soaking of rolled food materials, referring to... Figure 1 , Figure 2 In embodiment 3, Vietnamese spring roll wrappers are used as the material for rolling food. The constant-temperature soaking control device for the rolled food material includes a soaking tank 1, a soaking plate 2, a driving device, a first temperature sensor, and a heating component. The soaking tank 1 is a rectangular structure with a volume of 5-10L, filled with clean water as the soaking solution. The soaking plate 2 is made of food-grade stainless steel mesh with a 2mm aperture, horizontally positioned within the soaking tank 1 and close to the surface of the soaking solution, with a spacing of no more than 1cm to facilitate rapid immersion and prevent liquid splashing. The first temperature sensor is installed in the middle of the soaking tank 1, away from the heating component to avoid local temperature interference, and is used to collect the temperature of the soaking solution in real time. The heating component is an electric heater with a power adjustment range of 50-300W, electrically connected to the first temperature sensor.

[0031] Reference Figure 1 It includes the following steps: Based on the soaking plate 2 for placing the soaking material 4, the soaking plate 2 is located above the surface of the soaking liquid in the soaking tank 1. The soaking tank 1 is equipped with a driving device that covers the surface of the soaking plate 2 with the soaking liquid. Clean water is injected into the soaking tank 1 to the preset liquid level. The soaking temperature is set to 28°C, which is the optimal softening temperature for Vietnamese spring roll wrappers. The preset reference difference is 5°C. The first soaking time is set to 3 seconds, and the second soaking time is set to 6 seconds. The first soaking time is included in the second soaking time. The additional 3 seconds is a buffer time for the reset speed and the natural flow of water. The reset speed is set to 5 cm / s.

[0032] The first temperature sensor installed in the soaking tank 1 acquires the liquid temperature of the soaking solution. If the liquid temperature is lower than the preset soaking temperature, the soaking solution is heated. The difference between the liquid temperature and the soaking temperature is calculated as the temperature difference. The temperature difference ratio is calculated based on the temperature difference and a preset reference difference. The heating power is controlled according to the positive correlation of the temperature difference ratio. Otherwise, the heating power is set to zero. The first temperature sensor acquires the liquid temperature of the soaking solution in real time. If the detected liquid temperature is 22℃, which is less than 28℃, the temperature difference is calculated to be 6℃. The temperature difference ratio = 6℃ / 5℃ = 1.2. The heating power is adjusted to 240W according to this positive correlation. The larger the temperature difference, the higher the heating power. When the liquid temperature reaches 28℃, the heating power is set to zero to maintain a constant temperature.

[0033] Based on a preset start command, the drive device starts working, immersing the soaking plate 2. The drive device then stops working and resets, moving the soaking material 4 onto the soaking plate 2. After the heating power is set to zero, the drive device is started again, allowing the soaking liquid to soak the surface of the soaking material 4. After soaking for a preset first duration, the drive device stops working and resets, ensuring that the soaking material 4 is continuously soaked for at least a preset second duration, wherein the first duration is included within the second duration. A preset start command is sent via a manual trigger button, and the drive device... The pumping unit (3) is activated, drawing clean water from the bottom inlet of the soaking tank 1 and spraying it onto the soaking plate 2 through the side outlet. The soaking plate 2 is immersed for 10 seconds, then the pumping unit stops and resets. Vietnamese spring roll wrappers are laid flat on the soaked plate 2. After confirming the heating power is at zero, the pumping unit 3 is activated again to evenly immerse the surface of the spring roll wrappers in water. Soaking continues for 3 seconds (first duration), then the pumping unit 3 stops and resets. The spring roll wrappers remain immersed on the soaking plate 2 for 6 seconds (second duration), completing the softening process. Here, "immersing" refers to the spring roll wrappers being in water, and "soaking" indicates that the wrappers are still wet after being removed from the water.

[0034] Complete the rolling operation of soaking material 4 on soaking plate 2. After soaking, place the filling such as low-fat shrimp and crab stick directly on soaking plate 2, and roll the softened Vietnamese spring roll wrapper. There is no need to transfer the ingredients to avoid the spring roll wrapper breaking due to movement.

[0035] Through the above steps, the embodiment achieves constant temperature and precise soaking of Vietnamese spring roll wrappers: the linkage control of the first temperature sensor and the heating power reduces the temperature fluctuation of the soaking solution, avoiding the temperature deviation of traditional manual soaking; the orderly soaking and fixed duration of the driving device ensure that the spring roll wrappers soften evenly and have suitable toughness, without breakage or loss of toughness; the design of directly rolling after soaking simplifies the processing process and improves processing efficiency.

[0036] To reduce the impact of fluctuations in the waiting time between soaking and rolling on the soaking effect, the following steps are also included: Based on the core device, a timing module and an abnormality indication module are added: The timing module is integrated into the processor and electrically connected to the drive device. It is used to record the time interval from the completion of soaking (the second reset of the drive device) to the start of the rolling operation, i.e. the waiting time; The abnormality indication module adopts an audible and visual alarm, which is installed in a conspicuous position on the outside of the soaking tank 1 and is connected to the processor signal to trigger an abnormal soaking warning.

[0037] Based on the parameters of the aforementioned embodiments, a new preset warning duration of 10 seconds is added to match the optimal rolling window period after soaking Vietnamese spring roll wrappers. The statistical sample size is set to 10 times, that is, the average waiting time of 10 consecutive batches is calculated to ensure adjustment stability.

[0038] The timing begins after soaking and ends when the rolling operation begins, providing the waiting time. After each batch of spring roll wrappers has completed the second soaking time (6 seconds), the timing module automatically starts timing. When the operator starts the rolling operation, the timing module stops timing and generates the waiting time for that batch. For example, the waiting time for one batch is 25 seconds, and for another batch it is 8 seconds.

[0039] If the waiting time exceeds the preset warning time, an abnormal soaking warning will be issued. If the waiting time for a batch exceeds the preset warning time, i.e., 10 seconds, such as the batch mentioned above that takes 25 seconds, the processor will immediately activate the audible and visual alarm, which will emit a continuous buzzer for 3 seconds and flash a red light to remind the operator to roll the spring rolls in time to prevent the spring roll wrappers from becoming too soft and sticky.

[0040] The average of multiple waiting times is calculated, and the warning ratio is calculated based on the average and the warning time. The second time is adjusted according to the negative correlation of the warning ratio. After 10 consecutive batches of soaking-rolling operations are completed, the processor automatically calculates the average of the 10 waiting times. Assuming the 10 waiting times are 2.5 seconds, 1.8 seconds, 2.2 seconds, 1.9 seconds, 2.3 seconds, 2.1 seconds, 1.7 seconds, 2.4 seconds, 2.0 seconds, and 1.6 seconds, the average is (2.5+1.8+2.2+1.9+2.3+2.1+1.7+2.4+2.0+1.6) / 10=2.05 seconds.

[0041] The warning ratio is calculated as: average waiting time / warning time = 2.05 seconds / 10 seconds = 0.205. Based on the logic of "adjusting the second duration with a negative correlation between the warning ratio and the second duration", the original second duration was 6 seconds. Since the warning ratio is less than 1, the second duration is increased to 6.2 seconds. The more effective the warning ratio, the greater the increase in the second duration. If the average is 11 seconds and the warning ratio is 1.1, the second duration is decreased to 5.8 seconds to match the actual rolling rhythm. The specific adjustment is obtained through matching based on a large number of experiments.

[0042] By monitoring and dynamically adjusting the waiting time, the problem of "disorderly waiting after soaking" in traditional processing is effectively avoided: the abnormal prompt module reduces the probability of spring roll skins waiting for too long and reduces the phenomenon of excessive water absorption; the negative correlation adjustment mechanism of the second time allows the total soaking time to be precisely matched with the actual rolling rhythm. Even if the fluctuation range of waiting time between different batches is reduced, the softening adaptability of spring roll skins remains consistent, improving the subsequent rolling forming rate and further enhancing the error tolerance of the processing process and the stability of finished product quality.

[0043] To further improve the accuracy of constant temperature soaking, the following steps are also included: A second temperature sensor is added, which can be a food-grade PT100 patch temperature sensor. Four sampling points are evenly distributed along the length of the soaking plate 2 (stainless steel mesh plate) with a spacing of 10cm. The sensor probe is attached to the upper surface of the plate and does not protrude from the mesh to avoid obstructing the flow of the soaking solution and the placement of materials. The data from the four sampling points are weighted and averaged by the processor to obtain the final plate temperature value, ensuring detection accuracy. An intelligent parameter adjustment module is also added: integrated into the main control processor, it establishes a real-time signal connection with the second temperature sensor, the drive device, and the heating component. Its functions include: receiving plate temperature data, calculating the plate temperature correlation ratio, selecting the adjustment mode (immersion time / heating power control coefficient) according to preset logic, and outputting adjustment commands to achieve targeted compensation for temperature deviations.

[0044] Based on the soaking temperature setting of 28℃ (the optimal softening temperature for Vietnamese spring roll wrappers), the first soaking time is 3 seconds, and the second soaking time is 6 seconds; new adaptive parameters have been added: the preset setting difference is 4℃ (a reasonable temperature difference threshold determined based on the thermal conductivity characteristics of spring roll wrappers), the base value of the soaking time is 3 seconds, the initial value of the heating power control coefficient is 1.0, and the control coefficient adjustment range is 0.9-1.3, which ensures the compensation effect while avoiding efficiency reduction caused by heating power overload or excessive soaking time.

[0045] After the operator sends the start command through the control panel, the processor immediately triggers the second temperature sensor to start, and the four acquisition points simultaneously collect the board temperature. For example, when the ambient temperature is 20℃, the data collected during the first start is 23℃, 22.8℃, 23.2℃, and 22.9℃. After weighted averaging, the board temperature value is 22.97℃, approximately 23℃.

[0046] The processor compares the plate temperature value with the preset soaking temperature value of 28℃. If the plate temperature value is less than the soaking temperature value, such as 23℃ < 28℃, it determines that plate preheating compensation is required and immediately sends a start signal to the drive device to trigger the soaking plate 2 immersion operation.

[0047] The difference between the soaking temperature and the plate temperature is calculated as the plate temperature difference. The plate temperature ratio is calculated based on the plate temperature difference and the preset set difference. The soaking time in the soaking step is adjusted according to the plate temperature ratio, or the control coefficient for controlling the heating power based on the temperature difference ratio is adjusted according to the plate temperature ratio.

[0048] Panel temperature difference = preset soaking temperature value - panel temperature value; Panel temperature ratio = panel temperature difference / preset setting difference; Adjustment Mode 1 (Positive Correlation Adjustment of Immersion Time): Suitable for scenarios where the plate temperature is slightly lower than the immersion temperature and gentle preheating is required.

[0049] Example 1: The plate temperature is 26℃, the plate temperature difference is 28℃ - 26℃ = 2℃, and the plate temperature ratio is 2℃ / 4℃ = 0.5. The immersion time is adjusted according to the logic of positive correlation with the plate temperature ratio. The immersion time is the base value (3 seconds) × (1 + plate temperature ratio) = 3 seconds × 1.5 = 4.5 seconds. The drive device (pump assembly 3) sprays the immersion liquid onto the immersion plate 2 for 4.5 seconds to achieve plate temperature and preheating. Example 2: Plate temperature 24℃, plate temperature difference = 4℃, plate temperature ratio = 1.0, immersion time = 3 seconds × 2.0 = 6 seconds, extend the immersion time to ensure that the plate temperature approaches the immersion solution temperature; Adjustment Mode 2 (Positive Correlation Adjustment of Heating Power Control Coefficient): Suitable for scenarios where the plate temperature is significantly lower than the immersion temperature and rapid temperature replenishment is required.

[0050] Example: When the ambient temperature is 15℃, the plate temperature is 21℃, the plate temperature difference is 7℃, and the plate temperature ratio is 7℃ / 4℃ = 1.75. According to the logic of adjusting the heating power control coefficient based on the positive correlation of the plate temperature ratio, the control coefficient is: initial value (1.0) + (plate temperature ratio - 0.5) × 0.4 = 1.0 + (1.75 - 0.5) × 0.4 = 1.5, which exceeds the upper limit of 1.3, so the final value is 1.3. In the core process, the first temperature sensor detects the temperature of the soaking solution at 22℃, calculates the temperature difference as 6℃, and the temperature difference ratio as 6℃ / 5℃ = 1.2. The aforementioned embodiment presets a reference difference of 5℃, and the original heating power is 300W × 1.2 = 360W, which exceeds the 300W upper limit. After adjustment by the control coefficient, the actual heating power is 300W × 1.2 × 1.3 = 468W. It should be noted here that the maximum rated power of the heating component is 500W, and 468W is within the safe range. By increasing the heating power, the temperature of the soaking solution is accelerated, and at the same time, the soaking solution wets the plate to achieve rapid heat conduction, shortening the temperature deviation compensation time.

[0051] Adjustment priority: The processor prioritizes immersion time adjustment by default. When the board temperature ratio is greater than 1.5, it automatically switches to heating power control coefficient adjustment to balance preheating effect and energy efficiency.

[0052] After the soaking time or heating power control coefficient is adjusted, the drive device completes the soaking of the soaking plate 2 according to the adjusted parameters or the heating component works according to the adjusted power. The subsequent "material placement (laying Vietnamese spring roll wrappers flat) → soaking material in soaking liquid → soaking for the first time → resetting the drive device → continuous soaking for the second time → rolling operation" all follow the process of this embodiment described above, ensuring the continuity and consistency of the processing flow. After each batch of processing is completed, the second temperature sensor automatically clears the data to prepare for the next batch of testing.

[0053] This embodiment employs two different driving devices: Reference Figure 2 The first type: fixed soaking plate 2 + pump-spray assembly 6 Pumping component 3: It adopts a food-grade micro centrifugal pump with a rated power of 50-150W and a flow rate adjustment range of 5-15L / min. It has anti-corrosion and low noise characteristics. The water inlet is located at the center of the bottom of the soaking tank 1 and is equipped with a filter screen (0.5mm aperture) to prevent impurities from clogging. Two water outlets are symmetrically arranged in the upper middle part of the inner side wall of the soaking tank 1, with a horizontal distance of 8cm from the soaking plate 2. The water outlet nozzles are universally adjustable with a spray angle of 30°-60° to ensure that the entire surface of the soaking plate 2 is covered.

[0054] Spray assembly 6: It consists of a spray frame and 8 high-pressure atomizing nozzles. The spray frame spans across the soaking tank 1, and the nozzles are evenly distributed with a spacing of 5cm and are vertically aligned with the soaking plate 2. The water inlet of spray assembly 6 is connected to the water outlet of pump assembly 3 through a three-way pipe. It is equipped with a pressure sensor and an electric regulating valve (diameter adjustment range 2-8mm) to monitor the spray pressure and adjust the spray diameter, respectively. The parameters are dynamically adjusted in conjunction with the processor signal.

[0055] Reference Figure 3 The second type: 2 adjustable soaking plates + 5 lifting components Soaking plate 2: Made of food-grade stainless steel perforated plate (3mm hole diameter, 2mm thickness), the size is adapted to the inner wall of soaking tank 1 with a gap ≤2mm to ensure smooth lifting without jamming.

[0056] Lifting assembly 5: consists of 2 sets of synchronous electric push rods (rated thrust 500N, stroke adjustment range 0-20cm), guide rails and position sensors; the electric push rods are vertically fixed to the bottom of the outer side of the soaking tank 1, and the top of the push rods are fixedly connected to the bottom sides of the soaking plate 2. The guide rails are installed on the inner side wall of the soaking tank 1, restricting the soaking plate 2 to move only in the vertical direction; the position sensors are used to provide real-time feedback on the height of the soaking plate 2 to ensure accurate positioning of the lowest / highest position.

[0057] Specifically, the method for fixing the soaking plate 2 and the pump-spray assembly 6, which is suitable for precise immersion scenarios, is as follows: The key parameters of the aforementioned embodiment and plate temperature adjustment scheme are retained: immersion temperature value 28℃, preset setting difference 4℃, and plate temperature ratio calculation logic; new spray adjustment parameters are added: basic value of spray pressure 0.1MPa, basic value of spray nozzle diameter 5mm, and the plate temperature ratio is negatively correlated with the spray pressure / nozzle diameter adjustment relationship, with adjustment coefficients of 0.02MPa / unit ratio and 1mm / unit ratio.

[0058] After the start command is triggered, the second temperature sensor collects the board temperature and calculates the board temperature ratio. For example, if the board temperature is 23℃ and the board temperature difference is 5℃, the board temperature ratio = 5℃ / 4℃ = 1.25. The processor controls the pumping component 3 to start, drawing the constant temperature soaking liquid in the soaking tank 1. Part of it is sprayed horizontally onto the soaking plate 2 through the side wall outlet at a flow rate of 8L / min, and the other part is sprayed vertically through the spraying component 6 with an initial pressure of 0.1MPa and a nozzle diameter of 5mm, so as to achieve simultaneous double-sided wetting of the soaking plate 2. Perform negative correlation adjustment based on the plate temperature ratio: If the plate temperature ratio is 1.25, the plate temperature is too low, and gentle and thorough wetting is required. In this case, the spray pressure is reduced to 0.1MPa - (1.25 - 1.0) × 0.02MPa = 0.095MPa, and the spray nozzle diameter is increased to 5mm + (1.25 - 1.0) × 1mm = 5.25mm. The combination of "low pressure + large diameter" improves the uniformity of wetting and avoids excessive local impact force that could cause material damage. If the plate temperature ratio is 0.5, and the plate temperature is close to the immersion temperature, rapid and precise immersion is required. In this case, the spray pressure is increased to 0.1MPa + (1.0-0.5) × 0.02MPa = 0.11MPa, and the spray nozzle diameter is decreased to 5mm - (1.0-0.5) × 1mm = 4.5mm. By combining "high pressure + small diameter", the immersion time is shortened and the processing efficiency is improved.

[0059] After soaking, the pumping assembly 3 maintains a low flow rate (5L / min) to ensure that the soaking plate 2 and the material surface are continuously covered with a thin liquid layer during the soaking process; after soaking, the pumping assembly 3 stops working, and the subsequent rolling operation follows the aforementioned process.

[0060] For the adjustable soaking plate 2 + lifting assembly 5, suitable for batch soaking scenarios, the specific method is as follows: The first duration of 3 seconds, the second duration of 6 seconds, or the dynamic second duration after adjusting the waiting time are retained from the previous embodiment; new lifting and lowering adjustment parameters are added: the base depth of the highest position of the soaking plate 2 (5cm distance from the liquid surface) and the lowest position (3cm below the liquid surface), and the base value of the lifting and lowering speed is 1cm / s; the second duration is positively correlated with the lowest position with an adjustment coefficient of 0.1cm / s, and negatively correlated with the lifting and lowering speed with an adjustment coefficient of 0.02cm / s² / s.

[0061] After the start command is triggered, the lifting component 5 drives the soaking plate 2 to descend from the highest position to the lowest position base depth, 3cm below the liquid surface, to complete the pre-soaking of the soaking plate 2 for 5 seconds; then the lifting component 5 drives the soaking plate 2 to rise to the highest position, and the operator lays the Vietnamese spring roll wrapper flat on the soaking plate 2. After the heating power is set to zero, the lifting component 5 drives the soaking plate 2 to descend to the lowest position at a base speed of 1cm / s, and the soaking liquid completely submerges the spring roll wrapper, starting the first soaking time (3 seconds); The parameters are dynamically adjusted based on the second duration: If the second duration is extended to 7 seconds after the waiting time is adjusted, the soaking depth and immersion time need to be increased. The depth of the lowest position is then adjusted to 3cm + (7-6) × 0.1cm = 3.1cm, and the lifting speed is adjusted to 1cm / s - (7-6) × 0.02cm / s² = 0.98cm / s. By "deepening the soaking depth and slowing down the lifting speed", the material is ensured to soften sufficiently. If the second soaking time is shortened to 5.5 seconds, the soaking depth needs to be reduced to avoid excessive softening. The minimum position depth is adjusted to 3cm - (6.0-5.5)×0.1cm=2.95cm, and the lifting speed is adjusted to 1cm / s + (6.0-5.5)×0.02cm / s²=1.01cm / s. By "reducing the soaking depth and increasing the lifting speed", the short soaking time requirement is adapted. After the first duration ends, the lifting component 5 drives the soaking plate 2 to rise to the highest position, and the spring roll wrapper continues to be soaked on the plate until the second duration ends, after which the rolling operation is carried out directly.

[0062] To further improve heating efficiency and temperature uniformity, a new power regulation module and a status monitoring module have been added, as detailed below: Power regulation module: Integrated into the main control processor, it is linked with the heating component and the drive device (pump component 3 / lifting component 5) by signal. Its core function is to receive temperature ratio data, calculate the target drive power according to preset logic, and output precise power regulation commands to ensure that the drive power and temperature ratio are accurately matched.

[0063] Status monitoring module: includes a flow sensor (adapted to pumping component 3), a speed sensor (adapted to lifting component 5), and a temperature distribution sensor (three collection points are evenly distributed in the soaking tank 1), which are used to monitor the pumping flow rate, lifting speed, and soaking liquid temperature distribution in real time, provide feedback on the adjustment effect, and form a closed-loop control.

[0064] The specific method is as follows: The soaking temperature value of 28°C and the power adjustment range of the heating component are retained from the previous embodiment. The following adaptation parameters are added: the preset force ratio is 1.2, which is determined based on the heating characteristics of the spring roll skin soaking liquid. If the temperature ratio exceeds this threshold, the force needs to be driven. The drive power adjustment parameters are: the basic drive power of the pumping component 3 is 80W, the adjustment coefficient is 30W / unit temperature ratio, and the adjustment range is 50-150W; the basic drive power of the lifting component 5 is 100W, the adjustment coefficient is 50W / unit temperature ratio, and the adjustment range is 50-200W. The correlation logic is clarified: the pumping flow rate of the pumping component 3 is positively correlated with the drive power, with a correlation coefficient of 0.2L / (min・W); the lifting speed of the lifting component 5 is positively correlated with the drive power, with a correlation coefficient of 0.02cm / (s・W).

[0065] Heating and force application of different types of drive devices Type 1: Fixed soaking plate 2 + pumping assembly 3 After heating is started, the first temperature sensor collects the temperature value of the soaking solution in real time. For example, if the initial water temperature is 22℃ and the soaking temperature is 28℃, the temperature ratio is calculated as: soaking temperature value / liquid temperature value = 28℃ / 22℃ ≈ 1.27. The processor compares the temperature ratio (1.27) with the preset force ratio (1.2). Since 1.27 > 1.2, it determines that the drive force needs to be activated and sends a start command to the pumping component 3. According to the logic of "adjusting drive power with positive correlation of temperature ratio", the target drive power is calculated as follows: base value (80W) + (temperature ratio - force ratio) × adjustment coefficient = 80W + (1.27-1.2) × 30W ≈ 82.1W (rounded to 82W). Pumping component 3 operates at 82W power, corresponding to pumping flow rate = base flow rate (8L / min) + (target drive power - base power) × correlation coefficient = 8L / min + (82-80) × 0.2L / (min・W) = 8.4L / min, increasing the circulation flow rate of the soaking liquid and accelerating heat diffusion; The temperature distribution sensor monitors in real time. When the temperature of the soaking solution rises to 26℃, the temperature ratio = 28 / 26≈1.08<1.2. The processor controls the pumping component 3 to restore the basic power of 80W and the flow rate to 8L / min until the soaking solution reaches 28℃, and the heating power is set to zero.

[0066] Type 2: 2 adjustable soaking plates + 5 lifting components After heating is started, the first temperature sensor collects the soaking liquid temperature value of 20℃, calculates the temperature ratio = 28℃ / 20℃ = 1.4 > 1.2, and triggers the drive to apply force; Calculate the target drive power = base value (100W) + (1.4-1.2) × 50W = 110W; The lifting component 5 operates at 110W power, corresponding to a lifting speed = base speed (1cm / s) + (110-100) × 0.02cm / (s・W) = 1.2cm / s; The processor controls the lifting component 5 to drive the soaking plate 2 to move back and forth between the lowest position (3cm below the liquid surface) and the middle position (1cm below the liquid surface) at a speed of 1.2cm / s. The lifting frequency is increased from 0.5 times / minute to 1 time / minute. By increasing the contact frequency between the soaking plate 2 and the soaking liquid, heat conduction is accelerated, and the temperature difference between the bottom (near the heating component) and the top of the soaking liquid is avoided to be too large. When the temperature of the soaking solution rises to 25℃, the temperature ratio = 28 / 25 = 1.12 < 1.2, and the lifting component 5 restores its basic power of 100W and speed of 1cm / s until the soaking solution reaches a constant temperature.

[0067] During the heating phase, the drive force adjustment, temperature monitoring, and heating power adjustment steps are carried out simultaneously. When the immersion liquid temperature reaches the preset immersion temperature value, the drive device switches to the immersion / soaking mode according to the core process requirements, and the power adjustment module automatically resets. If the temperature sensor detects an abnormal immersion liquid temperature (>32℃), the processor immediately cuts off the power supply to the heating component and reduces the drive power to the base value, triggering an audible and visual alarm to ensure processing safety.

[0068] Those skilled in the art can flexibly adjust the force ratio (1.1-1.3), drive power adjustment coefficient, and flow / speed correlation coefficient according to the volume of the soaking tank 1 (5-10L), the upper limit of the heating component power, and the rated parameters of the drive device. All such adjustments are within the protection scope of this application.

[0069] In this embodiment, the softening degree of individual materials within a single batch is controlled by using light transmittance detection to intuitively reflect the actual softening state of the material, enabling personalized foam replenishment and dynamic optimization of the second duration. Based on the core device and the aforementioned solution, a photoelectric detection module and a delay control module are added, as detailed below: Photoelectric detection module: It adopts a food-grade infrared photoelectric sensor with waterproof and dustproof characteristics (protection level IP67); the sensor is divided into a transmitter and a receiver, which are symmetrically installed on the brackets on both sides below the soaking plate 2. The transmitter emits infrared light vertically upward, and the receiver receives the light signal that penetrates the soaking material 4, ensuring that the detection path is unobstructed; the sensor is connected to the processor and converts the light signal into a transmittance value in real time, expressed as a percentage, ranging from 0-100%. The higher the transmittance value, the more fully the material is softened.

[0070] Delay control module: Integrated into the main control processor, it works in conjunction with the photoelectric detection module and the drive device. Its core functions are to receive the light transmittance judgment result, output the delay winding command, and control the drive device to maintain low flow immersion during the delay period.

[0071] The specific method is as follows: The first duration of 3 seconds and the second duration of 6 seconds, or the dynamic values ​​adjusted by the aforementioned scheme, are used in the previous embodiment. A new light transmittance-related parameter is added: the preset light transmittance reference value is 85%, which is determined based on the actual light transmittance of the Vietnamese spring roll skin after it has been fully softened, representing the appropriate softening standard for rolling; the light transmittance ratio adjustment coefficient is set to 2 seconds / unit ratio, that is, for every 0.1 increase in the light transmittance ratio, the second duration is extended by 2 seconds, and the maximum threshold for delayed rolling is 3 seconds to avoid excessive soaking.

[0072] Transmittance acquisition: When a batch of materials has completed the first soaking time (3 seconds) and the drive device has been reset, the photoelectric detection module is automatically started; infrared light penetrates each piece of Vietnamese spring roll skin laid flat on the soaking plate 2, the receiving end collects the light signal and converts it into a transmittance value, and the processor records the latest transmittance value of each piece of material. For example, the transmittance values ​​of 3 pieces of material in a certain batch are 88%, 79%, and 83%, respectively.

[0073] Softening status determination: The processor compares the light transmittance of each piece of material with the preset light transmittance reference value (85%): If the light transmittance is ≥85%, and 88% of 88% or 83% meets the standard, the material is deemed to have softened sufficiently and does not require a delay, and can enter the normal rolling queue. If the light transmittance is less than 85%, or if 79% fails to meet the standard, the material is deemed to be insufficiently softened, triggering a delayed winding command.

[0074] Delayed winding and second duration adjustment: For materials that do not meet the standards, the light transmittance ratio is calculated as follows: Light transmittance reference value / Light transmittance value that does not meet the standards = 85% / 79% ≈ 1.076; Based on the logic of adjusting the second duration according to the positive correlation of the transmittance ratio, the second duration of this batch is updated to the original 6 seconds + (1.076-1.0)×2.0 seconds≈7.152 seconds, rounded down to 7.2 seconds; The delay control module is activated, controlling the winding operation to be delayed by 1.2 seconds, consistent with the extension range of the second duration. At the same time, the drive device continuously sprays the soaking liquid onto the material surface at a low flow rate (3L / min) to ensure that the material does not lose water or harden during the soaking period. After the delay ends, the photoelectric detection module collects the light transmittance of the material again. If it is still <85%, the above steps are repeated until the standard is met or the longest delay threshold is reached.

[0075] Process integration: After all materials meet the standards, the processor issues a rolling start command, and the operator directly completes the rolling on the soaking plate 2; after the rolling of this batch is completed, the second duration is automatically updated to the adjusted 7.2 seconds and applied to the next batch of soaking, realizing the optimization and inheritance between batches.

[0076] If a material still has a light transmittance of less than 85% (e.g., 70%) after a maximum 3-second delay for re-soaking, it is determined that the material itself has abnormal characteristics (e.g., uneven thickness). The processor will trigger an audio-visual prompt to remind the operator to remove the material to avoid affecting the overall rolling efficiency and finished product quality.

[0077] To further optimize the adjustment of light transmittance, the dynamic trend of light transmittance values ​​across multiple batches is monitored. This proactively adapts to changes in softening characteristics caused by batch-to-batch material differences or fluctuations in processing environments, enabling precise predictive adjustment for the first time period. This avoids batch-specific over-softening or under-softening. Based on the existing photoelectric detection module, a data storage module and a trend analysis module have been added, as detailed below: Data storage module: It adopts an embedded storage chip with a capacity of ≥16GB to continuously store the average transmittance value of each batch within a set number of soaking cycles. The arithmetic mean of the transmittance values ​​of all materials is taken for each batch. The storage retention time is ≥30 days. It supports data traceability and batch export to ensure the sample integrity of trend analysis.

[0078] Trend Analysis Module: Integrated into the main control processor, its core functions are to read the stored transmittance values ​​of multiple batches, calculate the trend value of change according to the preset algorithm, and output the first duration adjustment command; it supports linear regression analysis algorithm, which can accurately capture the gradual change pattern of transmittance values.

[0079] The specific method is as follows: The initial value of the first duration (3 seconds), the light transmittance reference value (85%), and the photoelectric detection parameters of the aforementioned light transmittance detection scheme are retained from the previous embodiment. New trend analysis parameters are added: the number of immersions is set to 5 to balance trend accuracy and adjustment response speed, avoiding misjudgment due to insufficient sample size; the first duration adjustment coefficient is 0.5 seconds per unit trend value, meaning that for every 1 change in the trend value, the first duration is adjusted by 0.5 seconds; the first duration adjustment range is limited to 2-4 seconds to ensure that it is within the appropriate softening time range for the material, avoiding over-adjustment; the trend value calculation logic is clarified: a linear regression equation y=kx+b is used, where y is the light transmittance value, x is the immersion batch number, k is the slope (absolute value of the changing trend value), and b is the intercept. k is negative when the light transmittance gradually increases and positive when it gradually decreases.

[0080] Sample transmittance data collection and storage: After each batch of soaking is completed, the data storage module automatically records the average transmittance value of that batch. For example, the average transmittance values ​​of 5 consecutive batches (serial numbers 1-5) are 86%, 87%, 88%, 89%, and 90% (transmittance values ​​gradually increase), or 86%, 84%, 82%, 80%, and 78% (transmittance values ​​gradually decrease).

[0081] Trend value calculation: After completing the set 5 soaks, the trend analysis module initiates linear regression calculation: Example 1 (transmittance gradually increases): Substitute 5 sets of data (1,86), (2,87), (3,88), (4,89), (5,90) to calculate the linear regression equation y=1.0x+85, with a slope k=1.0; Since the trend value is negative when the transmittance gradually increases, the final trend value is -1.0; Example 2 (transmittance gradually decreases): Substitute the data (1,86), (2,84), (3,82), (4,80), (5,78), the linear regression equation is y=-2.0x+88, the slope is k=-2.0. Since the trend value of the transmittance decreasing is positive, the final trend value is 2.0.

[0082] First duration dynamic adjustment: Executed according to the logic of "adjusting the first duration based on the positive correlation of the changing trend value": Example 1 (Trend value = -1.0): Original first duration was 3 seconds, after adjustment the first duration = 3 seconds + (-1.0) × 5 seconds = 2.5 seconds; because the light transmittance gradually increases, the material softens faster, so shortening the first duration avoids excessive softening; Example 2 (Trend value = 2.0): After adjustment, the first duration = 3 seconds + 2.0 × 5 seconds = 4 seconds, reaching the adjustment limit and no longer increasing; because the light transmittance gradually decreases, the material softening speed slows down, so the first duration is extended to ensure sufficient softening.

[0083] Adjustment and Iterative Optimization: The adjusted first duration is immediately applied to the next batch of soaking, such as 2.5 seconds for the 6th batch in Example 1 and 4 seconds for the 6th batch in Example 2; for each new batch of soaking, the data storage module automatically removes the earliest batch of data to maintain dynamic updates of 5 consecutive samples. The trend analysis module repeats the above calculation and optimizes the first duration in real time, forming a closed-loop adjustment that is continuously iterated.

[0084] In addition, if the calculated first duration after adjustment exceeds the limit of 2-4 seconds, the boundary value is taken according to the principle of proximity. For example, if the trend value is 2.5, the adjusted duration is 3.0 + 2.5 × 0.5 = 4.125 seconds, and the actual duration is 4 seconds. At the same time, an audible and visual prompt is triggered to remind the operator to check whether there are any abnormalities in the batch characteristics of the material or the processing environment (such as water temperature and room temperature) to ensure that the adjustment is reasonable.

[0085] In other embodiments, the soaking effect is determined by image visual detection, and an image detection module and an image processing module are added, as detailed below: Image detection module: It adopts an industrial-grade high-definition color camera, equipped with a food-grade anti-fog and dustproof lens, with an IP65 protection rating, and is suitable for humid processing environments; the camera is installed on the side above the soaking tank 1 via an adjustable bracket, 250cm away from the soaking plate, with the shooting angle vertically aimed at the center area of ​​the soaking plate 2, ensuring complete coverage of all soaking materials 4 without any blind spots; the camera and processor are connected via a high-speed interface, with an image transmission delay of ≤100ms.

[0086] Image processing module: Integrated into the main control processor, it has a built-in deep learning image recognition algorithm based on the YOLOv5 lightweight model, with a recognition speed of ≥10 frames / second. Its core functions include: image preprocessing (denoising, enhancement, cropping), automatic extraction of 4 regions of soaked material (accurate segmentation of material and background with a segmentation accuracy of ≥99%), feature extraction (extraction of key features such as material edge morphology, texture uniformity, and color grayscale value), and difference value calculation (comparison with standard template image) to ensure accurate and reliable detection results.

[0087] The specific method is as follows: The first duration of 3 seconds, the second duration of 6 seconds, or the dynamic values ​​adjusted by the aforementioned scheme are retained from the previous embodiments; new image detection-related parameters are added: Template Images: Thirty pieces of Vietnamese spring roll wrappers were soaked in a standard solution (28℃, 6 seconds), and 30 sets of images were generated. A standard template image was generated by fusion of pixel mean values. The template image contains the standard shape of the material (no wrinkles, no damage), uniform texture (standard deviation of grayscale value ≤15), and complete edges with an edge integrity ≥98%. Preset gap reference value: Based on the features of the template image, the gap value threshold is set to 0.15. The difference value is calculated by weighting the structural similarity index SSIM and the mean absolute error MAE. The gap value ranges from 0 to 1. The closer it is to 0, the more consistent it is with the standard state. Adjustment coefficient: The positive correlation adjustment coefficient between the difference ratio and the second duration is 1 second / unit ratio. The maximum threshold for delayed rolling is 25 seconds to avoid excessive soaking that could cause material adhesion.

[0088] Immersion Image Acquisition: After the batch of materials has completed the first immersion time (3 seconds) and the drive device has been reset, the image detection module automatically starts and captures a clear image of all materials on the immersion plate 2 in 1 frame. After preprocessing, the image is transmitted to the image processing module.

[0089] Material region extraction and gap value calculation: The image processing module automatically segments the area of ​​each piece of soaking material 4, and removes interference factors such as the background of the soaking plate 2 and droplet reflection; Extract the edge shape, texture gray value, area ratio and other features of each material, compare them with the corresponding features of the preset template image, and calculate the difference value through a weighted algorithm: difference value = 0.6×(1-SSIM)+0.4×(MAE / 255), SSIM weight 0.6, MAE weight 0.4, normalized to the range of 0-1; Example: After soaking, a piece of material shows local wrinkles and uneven texture. The calculated SSIM=0.82, MAE=45, and the difference value is 0.6×(1-0.82)+0.4×(45 / 255)≈0.108+0.071≈0.179.

[0090] Assessment and dynamic adjustment of compliance: The processor compares the difference value (0.179) with the preset difference reference value (0.15). Since 0.179 > 0.15, it determines that the material does not meet the standard and triggers a delayed winding command. The calculated difference ratio is: Difference value / Difference reference value = 0.179 / 0.15 ≈ 1.193; Based on the logic of adjusting the second duration according to the positive correlation of the difference ratio, the second duration of this batch is updated to the original 6 seconds + (1.193 - 1.0) × 1.0 seconds ≈ 6.193 seconds, rounded to 6.2 seconds; The delay control module is activated, delaying the winding operation by 0.193 seconds. At the same time, the drive device maintains a low flow rate spray (2L / min) to avoid changes in material morphology or water loss during the replenishment of foam. After the delay ends, the image detection module takes another picture of the material and calculates the difference value. If the difference value is ≤0.15, it is determined to meet the standard. If it is still >0.15, the bubble replenishment adjustment is repeated until the standard is met or the longest delay threshold is reached.

[0091] Multi-material simultaneous processing: If multiple materials in the same batch fail to meet the standard, the adjustment range corresponding to the largest difference ratio is used to update the second time period, ensuring that all non-compliant materials can receive sufficient foam replenishment, while compliant materials wait until the end of the second time period for unified rolling.

[0092] In addition, if the difference value of a certain material is still >0.15 (e.g., 0.22) after a maximum delay of 2.5 seconds for re-soaking, it is determined that the material has an abnormal shape (e.g., initial wrinkles, severe uneven thickness) or abnormal soaking solution circulation. The processor will trigger an audible and visual alarm and display the location of the abnormal material on the control panel to remind the operator to handle it accordingly, remove it or rearrange it to avoid affecting the processing efficiency of the entire batch.

[0093] To further optimize the image vision inspection solution, a dynamic negative feedback adjustment mechanism driven by image recognition is constructed by continuously tracking the changing trends of the difference values ​​of multiple batches of materials. This mechanism proactively adapts to fluctuations in material batch characteristics or subtle changes in the processing environment, enabling predictive optimization in the first time period. A data storage module and a trend calculation module have been added, as detailed below: Data storage module: Adopts industrial-grade embedded storage chip with a capacity of ≥32GB, supports continuous storage of average difference values ​​of ≥1000 batches (arithmetic mean of the difference values ​​of all materials in each batch) and corresponding processing environment parameters (room temperature, initial temperature of soaking solution), storage latency ≤1ms, ensuring real-time data writing without loss, and supports historical data traceability and batch analysis.

[0094] Trend calculation module: Integrated into the main control processor, it has built-in linear regression and moving average algorithms. Its core functions are to read the continuous difference value within a set number of soaking times, fit the change curve, calculate the difference trend value, and output the first duration adjustment command. It can accurately capture the gradual change pattern and sudden fluctuation of the difference value.

[0095] The specific method is as follows: The initial value of the first duration (3 seconds), the reference value of the difference (0.15), and the template image and difference value calculation logic of the image detection scheme are retained from the previous embodiment. New trend analysis parameters are added: the number of immersions is set to 5 to balance sample representativeness and adjust response speed, avoiding trend misjudgment due to insufficient sample size; the first duration adjustment coefficient is 0.5 seconds per unit trend value, meaning that for every 1 change in the difference trend value, the first duration is adjusted by 0.5 seconds; the adjustment range of the first duration is limited to 2.0-4.0 seconds to ensure that the material is within the appropriate softening time range, avoiding over-adjustment leading to over-softening or under-softening; the trend value calculation rules are clarified: a linear regression equation y=kx+b is used, where y is the difference value, x is the immersion batch number, and k is the slope. Following the logic that a gradually increasing difference value leads to a positive difference trend value, and a gradually decreasing difference value leads to a negative difference trend value, the slope k is directly used as the difference trend value, and the slope sign naturally matches the trend definition.

[0096] Sample difference value collection and storage: After each batch of materials completes soaking and image detection, the data storage module automatically records the average difference value of that batch and removes outliers. The outlier judgment standard is: exceeding the average difference value of the previous 3 batches by ±30%. For example, the average difference values ​​of 5 consecutive batches (serial numbers 1-5) are 0.13, 0.14, 0.16, 0.17, and 0.18, with the difference value gradually increasing, or 0.16, 0.15, 0.14, 0.13, and 0.12, with the difference value gradually decreasing.

[0097] Difference trend value calculation: After completing the set 5 soaks, the trend calculation module starts linear regression analysis: Example 1 (The difference gradually increases): Substitute 5 sets of data (1, 0.13), (2, 0.14), (3, 0.16), (4, 0.17), (5, 0.18), fit the linear regression equation y = 0.012x + 0.118, the slope k = 0.012, that is, the difference trend value = 0.012, which is a positive value, representing that the soaking effect gradually deteriorates; Example 2 (difference gradually decreases): Substitute the data (1,0.16), (2,0.15), (3,0.14), (4,0.13), (5,0.12) and fit the linear regression equation y=-0.01x+0.17 with a slope k=-0.01. That is, the trend value of the difference is -0.01, which is negative, indicating that the soaking effect is gradually improving.

[0098] First-duration predictive adjustment: The logic of adjusting the first-duration interval is executed based on the positive correlation of the difference trend value. Example 1 (Trend value = 0.012): Original first duration 3 seconds, adjusted first duration = 3 seconds + 0.012 × (1 / 0.01) × 0.5 seconds = 3 seconds + 0.6 seconds = 3.6 seconds. Note: Because the absolute value of the trend value is small, a unit trend value conversion factor of 1 / 0.01 is introduced, that is, every 0.01 unit trend value corresponds to 1 times the adjustment factor, to ensure that the adjustment range is adapted to the actual trend; because the difference value continues to increase, the soaking effect deteriorates, so the first duration is extended to enhance the soaking effect and compensate for batch characteristic fluctuations, such as the material's water absorption capacity being enhanced. Example 2 (trend value = -0.01): Adjusted first duration = 3 seconds + (-0.01) × (1 / 0.01) × 0.5 seconds = 2.5 seconds; As the difference value continues to decrease, the soaking effect improves. Shortening the first duration avoids over-soaking and adapts to the optimized processing environment, such as increased room temperature.

[0099] Iterative optimization and trend update: The adjusted first duration is immediately applied to the next batch. For example, the 6th batch in Example 1 uses 3.6 seconds, and the 6th batch in Example 2 uses 2.5 seconds. For each new batch of soaking, the data storage module automatically performs a first-in-first-out update, retaining the difference value of the latest 5 consecutive batches. The trend calculation module repeats the above process to optimize the first duration in real time, forming a continuous iterative closed-loop adjustment mechanism.

[0100] In addition, if the first duration after adjustment exceeds the 20-40 second limit, the boundary value is taken according to the nearest principle. For example, if the trend value is 0.025, the adjusted duration is 3.0 + 0.025 × 100 × 0.5 = 4.25 seconds, and the actual duration is 4 seconds. At the same time, an audible and visual prompt is triggered to remind the operator to check the material batch (such as whether the supplier has been changed), the purity of the soaking solution, or the calibration status of the image detection module to ensure the rationality of the adjustment logic and the safety of the process.

[0101] This application also discloses a constant temperature soaking control device for rolled food materials, including a processor, wherein the processor executes the steps of the constant temperature soaking control method for rolled food materials as described in any of the above embodiments.

[0102] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for controlling the constant temperature soaking of rolled food materials, characterized in that, Includes the following steps: Based on the soaking plate (2) for placing the soaking material (4), the soaking plate (2) is located above the surface of the soaking liquid in the soaking tank (1), and the soaking tank (1) is equipped with a driving device that makes the surface of the soaking plate (2) covered with the soaking liquid. The liquid temperature value of the soaking liquid is obtained based on the first temperature sensor set in the soaking tank (1). If the liquid temperature value is less than the preset soaking temperature value, the soaking liquid is heated. The difference between the liquid temperature value and the soaking temperature value is calculated as the temperature difference value. The temperature difference ratio is calculated based on the temperature difference value and the preset reference difference value. The heating power is controlled according to the positive correlation of the temperature difference ratio. Otherwise, the heating power is set to zero. Based on the preset start command, the drive device starts working and wets the soaking plate (2). The drive device stops working and resets, moving the soaking material (4) onto the soaking plate (2). After the heating power is set to zero, the drive device is started, so that the soaking liquid wets the surface of the soaking material (4). After the soaking continues for a preset first time, the drive device stops working and resets, so that the soaking material (4) continues to be wetted for at least a preset second time, wherein the first time is included in the second time. Complete the rolling operation of the soaking material (4) on the soaking plate (2); A second temperature sensor is set on the soaking plate (2). In response to the start command, the second temperature sensor is controlled to collect the temperature on the soaking plate (2) to generate the plate temperature value. If the plate temperature value is less than the soaking temperature value, the drive device is controlled to start working so that the soaking liquid wets the soaking plate (2). The difference between the soaking temperature and the plate temperature is calculated as the plate temperature difference. The plate temperature ratio is calculated based on the plate temperature difference and the preset set difference. The soaking time in the soaking step is adjusted according to the plate temperature ratio, or the control coefficient for controlling the heating power based on the temperature difference ratio is adjusted according to the plate temperature ratio.

2. The method for controlling the constant temperature soaking of rolled food materials according to claim 1, characterized in that, The method also includes the following steps: The timer starts after soaking and ends when the rolling operation begins, thus recording the waiting time. If the waiting time exceeds the preset warning time, an immersion abnormality warning will be issued; Calculate the average of multiple waiting times, calculate the warning ratio based on the average and the warning duration, and adjust the second duration according to the negative correlation of the warning ratio.

3. The method for controlling the constant temperature soaking of rolled food materials according to claim 1, characterized in that, The position of the soaking plate (2) is fixed inside the soaking tank (1). The driving device includes a pumping component (3). A water inlet is provided at the bottom of the soaking tank (1). A water outlet is provided on the side wall of the soaking tank (1) and aligned with the soaking plate (2). The pumping component (3) draws the soaking liquid from the water inlet and sprays it onto the soaking plate (2) at the water outlet. The driving device also includes a spraying component (6). The spraying component (6) is set above the soaking tank (1) and aligned with the soaking plate (2). The inlet of the spraying component (6) is connected to the outlet of the pumping component (3). The spraying pressure or spraying diameter of the spraying component (6) is adjusted according to the negative correlation of the plate temperature ratio. Alternatively, the position of the soaking plate (2) can be raised and lowered within the soaking tank (1). The driving device includes a lifting assembly (5) connected between the soaking tank (1) and the soaking plate (2). When the lifting assembly (5) drives the soaking plate (2) to the lowest position within the soaking tank (1), the soaking plate (2) is below the surface of the soaking liquid. When the lifting assembly (5) drives the soaking plate (2) to the highest position within the soaking tank (1), the soaking plate (2) is above the surface of the soaking liquid. The lowest position of the soaking plate (2) within the soaking tank (1) is adjusted according to a positive correlation with the second duration, or the operating speed of the lifting assembly (5) is adjusted according to a negative correlation with the second duration.

4. The method for controlling the constant temperature soaking of rolled food materials according to claim 3, characterized in that, The step of heating the soaking solution also includes the following sub-steps: The ratio of the soaking temperature to the liquid temperature is calculated as the temperature ratio. If the temperature ratio is greater than the preset force ratio, the drive device is activated, and the drive power of the drive device is adjusted according to the positive correlation of the temperature ratio. If the drive device includes a pumping component (3), the pumping flow rate is positively correlated with the drive power; if the drive device includes a lifting component (5), the lifting frequency is positively correlated with the drive power or the lifting speed is positively correlated with the drive power.

5. The method for controlling the constant temperature soaking of rolled food materials according to claim 1, characterized in that, The method also includes the following steps: A photoelectric detection module is provided on the soaking plate (2). The photoelectric detection module is used to collect the light transmittance of the soaking material (4) and generate a light transmittance value. After the soaking material (4) has been soaked and before rolling, the latest light transmittance value is obtained. If the light transmittance value is less than the preset light transmittance reference value, the rolling is delayed, and the ratio of the light transmittance reference value to the light transmittance value is calculated as the light transmittance ratio value. The second time is adjusted according to the positive correlation of the light transmittance ratio value.

6. The method for controlling the constant temperature soaking of rolled food materials according to claim 5, characterized in that, The method also includes the following steps: For a set number of soaking times, calculate the trend values ​​of multiple transmittance values, and adjust the first duration according to the positive correlation of the trend values; where the transmittance value gradually increases, the trend value is negative, and the transmittance value gradually decreases, the trend value is positive.

7. The method for controlling the constant temperature soaking of rolled food materials according to claim 1, characterized in that, An image detection module is set up next to the soaking tank (1) and aligned with the soaking plate (2). The image detection module is used to capture the image on the soaking plate (2), extract the soaking material (4), and generate the soaking image. After the soaking material (4) has finished soaking and before rolling, the latest soaking image is obtained, and the difference between the soaking image and the preset template image is calculated; wherein, the template image is the standard image of the soaking material (4) after soaking is completed; If the difference value is greater than the preset difference reference value, the winding is delayed, and the ratio of the difference value to the difference reference value is calculated as the difference ratio. The second duration is adjusted according to the positive correlation of the difference ratio.

8. The method for controlling the constant temperature soaking of rolled food materials according to claim 7, characterized in that, The method also includes the following steps: For a set number of soaking times, calculate the difference trend value of multiple corresponding difference values, and adjust the first duration according to the positive correlation of the difference trend value; where the difference value gradually increases, the difference trend value is positive, and the difference value gradually decreases, the difference trend value is negative.

9. A constant temperature soaking control device for rolled food materials, characterized in that, The device includes a processor that performs the steps of the constant temperature soaking control method for rolling food materials as described in any one of claims 1-8.

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