Food preservation equipment control system and method

Abstract

The present invention relates to the field of food preservation technology, and in particular to a food preservation equipment control system and method, comprising a conveying module, a circulation module, a detection module, an analysis and control module, a cooling device, a modified atmosphere packaging module, and a sterilization and storage module; the detection module is used to detect the vibration frequency and vibration amplitude of the conveyor belt in the conveying module, the solution temperature of the preservative solution, and the content of the preservative in the preservative solution; the analysis and control module is used to determine the vibration degree of the conveyor belt and adjust the vibration parameters of the cylinder vibration device; the concentration of the preservative solution and the rate of concentration decrease are calculated to determine the degree of consumption of the preservative solution and adjust the cycle of replacing the preservative solution; a temperature change curve of the preservative solution solution temperature is drawn, the change trend of the preservative solution temperature is determined according to the derivative function of the temperature change curve, and the cooling unit is controlled to maintain the temperature within the food preservation temperature range. The present invention achieves a synergistic preservation effect by adopting two or more preservation methods to carry out composite preservation of food.

Description

Technical Field

[0001] The present invention relates to the technical field of food preservation, and in particular to a food preservation equipment control system and method. Background Art

[0002] Food preservation refers to the process of employing various methods and technologies to extend the shelf life of food and maintain its freshness, quality, and safety. In the food industry, food preservation technology not only helps reduce production costs but also expands the market reach of food, extends the shelf life of products, and improves product competitiveness. It also provides consumers with more choices, allowing them to enjoy fresh, high-quality, and safe food for a longer period of time. Therefore, food preservation technology plays an indispensable role in the modern food industry and is crucial to meeting the ever-increasing demand for food and promoting the sustainability of the food supply chain.

[0003] Chinese Patent Publication No. CN107744010A discloses a control method, control system, and refrigeration device for preserving food without freezing, comprising a cooling step in which the food is cooled for a first preset time, and the cooled food is above the ice crystal zone or in the process of crystallization; a heating step in which the cooled food is heated for a second preset time, and the heated food temperature is above the freezing point; and then the process returns to the cooling step. It can be seen that the control method, control system, and refrigeration device for preserving food without freezing have the following problems:

[0004] Food cells will form uneven large crystals during the freezing process. The water in the cells contains mineral elements that make the food delicious. Under the condition of full-speed freezing, the mineral elements will break through and separate from the ice crystals of the cells, and be lost with the ice water during thawing. Summary of the Invention

[0005] To this end, the present invention provides a food preservation equipment control system and method to overcome the problem in the prior art that food cells form uneven large crystals during the freezing process, and the water in the cells contains mineral elements that make the food delicious. Under full-speed freezing conditions, the mineral elements will break through and separate from the ice crystals in the cells and be lost with the ice water during thawing.

[0006] To achieve the above objectives, the present invention provides a food preservation equipment control system.

[0007] The conveying module includes a conveyor belt and a cylinder vibration device. The conveyor belt is located inside the immersion tank to constrain the food below the liquid level of the immersion tank. The cylinder vibration device impacts the conveyor belt at a standard vibration frequency to drive the food to vibrate.

[0008] A circulation module, comprising a circulation pump, a liquid storage tank, a soaking tank, and a filter screen. The circulation pump pumps the fresh-keeping liquid in the liquid storage tank into the soaking tank. The filter screen is used to remove food debris from the fresh-keeping liquid. The fresh-keeping liquid circulates in the liquid storage tank and the soaking tank.

[0009] A detection module, which includes a laser vibrometer, a temperature sensor, and a mass spectrometer, is used to detect the vibration frequency and amplitude of the conveyor belt in the conveying module, the solution temperature of the fresh-keeping liquid, and the content of the preservative in the fresh-keeping liquid, and transmit the detection data to the analysis and control module;

[0010] The analysis and control module is used to determine the vibration level of the conveyor belt and adjust the vibration parameters of the cylinder vibration device according to the vibration level of the conveyor belt; calculate the concentration of the fresh-keeping liquid and the rate of concentration decrease, determine the degree of fresh-keeping liquid consumption based on the rate of concentration decrease, and adjust the cycle of fresh-keeping liquid replacement; draw a temperature change curve of the fresh-keeping liquid solution temperature, determine the change trend of the fresh-keeping liquid temperature based on the derivative function of the temperature change curve, and control the cooling unit to maintain the temperature within the food preservation temperature range;

[0011] A cooling device for adjusting the temperature of the preservative liquid;

[0012] Modified atmosphere packaging module, used to input inert gas to package food in edible film;

[0013] The sterilization and storage module is used to sterilize and store packaged food using ultraviolet light.

[0014] Furthermore, the detection module performs non-contact vibration measurement by a laser vibrometer to detect the vibration frequency and vibration amplitude of the conveyor belt in the conveying module, and the analysis and control module compares the vibration amplitude of the conveyor belt with the maximum vibration amplitude.

[0015] If the vibration amplitude of the conveyor belt is greater than the maximum vibration amplitude, the analysis and control module determines that the vibration amplitude of the conveyor belt is too large, and adjusts the air pressure of the cylinder vibration device to change the magnitude of the impact force caused by the cylinder vibration device on the conveyor belt, thereby reducing the vibration amplitude of the conveyor belt;

[0016] If the vibration amplitude of the conveyor belt is less than or equal to the maximum vibration amplitude, the analysis and control module determines that the vibration amplitude of the conveyor belt is moderate.

[0017] Furthermore, when the vibration amplitude of the conveyor belt is less than or equal to the maximum vibration amplitude, the analysis and control module compares the vibration frequency of the conveyor belt with a preset standard vibration frequency, and calculates the frequency difference between the vibration frequency of the conveyor belt and the standard vibration frequency.

[0018] If the frequency difference between the vibration frequency of the conveyor belt and the standard vibration frequency is greater than the frequency difference evaluation value, the analysis and control module determines that the frequency difference between the vibration frequency of the conveyor belt and the preset standard vibration frequency is large.

[0019] Furthermore, when the frequency difference between the vibration frequency of the conveyor belt and the standard vibration frequency is greater than the frequency difference evaluation value,

[0020] If the vibration frequency of the conveyor belt is greater than the standard vibration frequency, the analysis and control module controls the conveying module to reduce the vibration frequency of the cylinder vibration device according to the ratio of the frequency difference evaluation value to the frequency difference.

[0021] Furthermore, the detection module detects the concentration of the fresh-keeping liquid by real-time detection of the content of the fresh-keeping agent in the fresh-keeping liquid, and the analysis and control module compares the concentration of the fresh-keeping liquid with the concentration critical value.

[0022] If the concentration of the fresh-keeping liquid is less than the critical concentration value, the analysis and control module determines that the content of the fresh-keeping agent in the fresh-keeping liquid is low, and sends a signal to the circulation module to control the circulation pump to increase the content of the fresh-keeping agent in the fresh-keeping liquid;

[0023] If the concentration of the fresh-keeping liquid is greater than the critical concentration value, the analysis and control module calculates the concentration decreasing speed according to the decreasing amount of the fresh-keeping liquid concentration per unit time.

[0024] Furthermore, when the concentration of the fresh-keeping liquid is greater than the critical concentration value, if the rate of decrease of the fresh-keeping liquid concentration is less than the standard rate of decrease, the analysis and control module determines that the rate at which the food consumes the preservative in the fresh-keeping liquid is slow, and increases the cycle period of the circulation module to replace the fresh-keeping liquid according to the ratio of the standard rate of decrease to the rate of decrease of the fresh-keeping liquid concentration;

[0025] If the rate of decrease in the concentration of the preservative liquid is greater than the standard rate of decrease, the analysis and control module determines that the food consumes the preservative in the preservative liquid faster, and reduces the cycle period of the circulation module to replace the preservative liquid according to the ratio of the standard rate of decrease to the rate of decrease in the concentration of the preservative liquid.

[0026] Furthermore, the detection device detects the solution temperature of the fresh-keeping solution in real time, and the analysis control unit draws a temperature change curve according to the solution temperature of the fresh-keeping solution and obtains the derivative function of the temperature change curve.

[0027] If the solution temperature in the temperature change curve at any moment is greater than the temperature critical value, the analysis control unit determines that the solution temperature of the fresh-keeping solution exceeds the fresh-keeping temperature range;

[0028] If the solution temperature in the temperature change curve at any moment is less than or equal to the temperature critical value, the analysis control unit determines that the solution temperature of the fresh-keeping solution is within the fresh-keeping temperature range.

[0029] Furthermore, when the temperature of the solution exceeds the preservation temperature range, if the value of the derivative function is greater than zero, the analysis and control unit determines that the temperature of the preservation solution is still continuously rising;

[0030] If the value of the derivative function is less than or equal to zero, the analysis and control unit determines that the solution temperature of the fresh-keeping solution remains unchanged or is decreasing.

[0031] Furthermore, when the temperature of the fresh-keeping solution continues to rise, the analysis control unit sends a signal to the cooling device to reduce the temperature of the fresh-keeping solution according to the product of the ratio of the temperature critical value to the solution temperature and the derivative function value;

[0032] When the temperature of the fresh-keeping solution remains unchanged or is decreasing, the analysis control unit sends a signal to the cooling device to reduce the temperature of the fresh-keeping solution according to the ratio of the temperature critical value to the solution temperature.

[0033] The present invention also provides a food preservation equipment control method, comprising:

[0034] Step S1: The food is transported to the circulation module through the transport module, and the food is immersed in the fresh-keeping liquid to keep it fresh. During the food transportation process, the cylinder vibration device of the transport module impacts the conveyor belt at a standard vibration frequency;

[0035] Step S2, determining the vibration degree of the conveyor belt and adjusting the vibration parameters of the cylinder vibration device according to the vibration degree;

[0036] Step S3, monitoring the concentration of the fresh-keeping solution in real time, maintaining the concentration of the fresh-keeping solution by quantitatively replenishing the fresh-keeping agent, and replacing the fresh-keeping solution regularly according to the cycle;

[0037] Step S4, determining the preservation capacity of the fresh-keeping liquid, and predicting the degree of consumption of the preservative in the fresh-keeping liquid, adjusting the circulation period of the fresh-keeping liquid and increasing the content of the preservative in the fresh-keeping liquid according to the degree of consumption of the preservative;

[0038] Step S5, detecting the solution temperature of the fresh-keeping solution, determining a change trend of the solution temperature of the fresh-keeping solution, and adjusting the solution temperature of the fresh-keeping solution to different degrees according to different change trends of the solution temperature;

[0039] Step S6: After the preservation treatment is completed, the food is transported to the discharge port by the conveyor belt, and the food is packaged in a modified atmosphere and sterilized for storage;

[0040] The standard vibration frequency is the natural vibration frequency of the food; and the vibration parameters include vibration amplitude and vibration frequency.

[0041] Compared with the prior art, the beneficial effect of the present invention is that due to the impact of the cylinder, the surface of the conveyor belt may be worn or locally deformed near the impact point, resulting in local thinning, tearing or damage of the conveyor belt, thereby affecting its service life and performance; and in the process of conveying food, if the food sticks together, the surface contact area between the food and the preservative liquid will be reduced, affecting the degree of preservation of the food; this control system detects the vibration frequency and vibration amplitude of the conveyor belt in the conveying module, determines the vibration degree of the cylinder vibration device, and adjusts the vibration parameters of the cylinder vibration device accordingly, controls the vibration amplitude of the conveyor belt, and controls the vibration frequency of the conveyor belt to be close to the natural vibration frequency of the food, thereby generating a resonance phenomenon, preventing the food from sticking and accumulating, thereby increasing the transportation efficiency of the food and the integrity of the food immersed in the preservative liquid.

[0042] Furthermore, the preservative in the preservative liquid can prevent the oxidation of fat, protein and other ingredients in food, thereby extending the shelf life of the food. The control system determines the preservative ability of the preservative liquid by detecting the content of the preservative in the preservative liquid, controls the amount of preservative liquid used, and avoids excessive use; and predicts the degree of consumption of the preservative in the preservative liquid by calculating the rate of decrease in the concentration of the preservative liquid, adjusts the circulation cycle of the preservative liquid, and improves the accuracy of preserving the food.

[0043] Furthermore, a single preservation technology may not necessarily meet consumers' increasingly upgraded high-quality demands. This control system determines the changing trend of the solution temperature of the preservative liquid by drawing a temperature change curve and obtaining the derivative function. According to the different changing trends of the solution temperature, the cooling device is controlled to adjust the solution temperature of the preservative liquid to different degrees. Two or more preservation methods are used for composite preservation to achieve a synergistic preservation effect, which further improves the accuracy of food preservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a unit connection diagram of a food preservation equipment control system in an embodiment of the present invention;

[0045] Figure 2 This is a flow chart of adjusting the circulation module according to the concentration of the fresh-keeping liquid in an embodiment of the present invention;

[0046] Figure 3 This is a flow chart of adjusting the cooling device according to the temperature of the fresh-keeping liquid in an embodiment of the present invention;

[0047] Figure 4 4 is a flowchart of the steps of the food preservation equipment control method in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0049] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0050] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0051] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0052] See also Figure 1-Figure 4 As shown, Figure 1 This is a unit connection diagram of a food preservation equipment control system in an embodiment of the present invention; Figure 2 This is a flow chart of adjusting the circulation module according to the concentration of the fresh-keeping liquid in an embodiment of the present invention; Figure 3 This is a flow chart of adjusting the cooling device according to the temperature of the fresh-keeping liquid in an embodiment of the present invention; Figure 4 4 is a flowchart of the steps of the food preservation equipment control method in an embodiment of the present invention.

[0053] The present invention provides a food preservation equipment control system, comprising:

[0054] The conveying module includes a conveyor belt and a cylinder vibration device. The conveyor belt is located inside the immersion tank to constrain the food below the liquid level of the immersion tank. The cylinder vibration device impacts the conveyor belt at a standard vibration frequency to drive the food to vibrate.

[0055] A circulation module, comprising a circulation pump, a liquid storage tank, a soaking tank, and a filter screen. The circulation pump pumps the fresh-keeping liquid in the liquid storage tank into the soaking tank. The filter screen is used to remove food debris from the fresh-keeping liquid. The fresh-keeping liquid circulates in the liquid storage tank and the soaking tank.

[0056] A detection module, which includes a laser vibrometer, a temperature sensor, and a mass spectrometer, is used to detect the vibration frequency and amplitude of the conveyor belt in the conveying module, the solution temperature of the fresh-keeping liquid, and the content of the preservative in the fresh-keeping liquid, and transmit the detection data to the analysis and control module;

[0057] The analysis and control module is used to determine the vibration level of the conveyor belt and adjust the vibration parameters of the cylinder vibration device according to the vibration level of the conveyor belt; calculate the concentration of the fresh-keeping liquid and the rate of concentration decrease, determine the degree of fresh-keeping liquid consumption based on the rate of concentration decrease, and adjust the cycle of fresh-keeping liquid replacement; draw a temperature change curve of the fresh-keeping liquid solution temperature, determine the change trend of the fresh-keeping liquid temperature based on the derivative function of the temperature change curve, and control the cooling unit to maintain the temperature within the food preservation temperature range;

[0058] A cooling device for adjusting the temperature of the preservative liquid;

[0059] Modified atmosphere packaging module, used to input inert gas to package food in edible film;

[0060] The sterilization and storage module is used to sterilize and store packaged food using ultraviolet light.

[0061] In this embodiment, the analysis and control module is provided with the maximum vibration amplitude and frequency difference evaluation value of the conveyor belt. Those skilled in the art can set the maximum vibration amplitude and frequency difference evaluation value according to specific needs;

[0062] The detection module performs non-contact vibration measurement using a laser vibrometer to detect the vibration frequency and amplitude of the conveyor belt in the conveying module. The analysis and control module compares the vibration amplitude of the conveyor belt with the maximum vibration amplitude.

[0063] If the vibration amplitude of the conveyor belt is greater than the maximum vibration amplitude, the analysis and control module determines that the vibration amplitude of the conveyor belt is too large, and adjusts the air pressure of the cylinder vibration device to change the impact force caused by the cylinder vibration device on the conveyor belt, thereby reducing the vibration amplitude of the conveyor belt;

[0064] If the vibration amplitude of the conveyor belt is less than or equal to the maximum vibration amplitude, the analysis and control module determines that the vibration amplitude of the conveyor belt is moderate, and the analysis and control module compares the vibration frequency of the conveyor belt with the preset standard vibration frequency, and calculates the frequency difference between the vibration frequency of the conveyor belt and the standard vibration frequency.

[0065] If the frequency difference between the vibration frequency of the conveyor belt and the standard vibration frequency is greater than the frequency difference evaluation value, the analysis and control module determines that the frequency difference between the vibration frequency of the conveyor belt and the preset standard vibration frequency is large.

[0066] Wherein, if the vibration frequency of the conveyor belt is greater than the standard vibration frequency, the analysis and control module controls the conveying module to reduce the vibration frequency of the cylinder vibration device according to the ratio of the frequency difference evaluation value to the frequency difference;

[0067] If the vibration frequency of the conveyor belt is lower than the standard vibration frequency, the analysis and control module controls the conveying module to increase the vibration frequency of the cylinder vibration device according to the ratio of the frequency difference value to the frequency difference evaluation value;

[0068] If the frequency difference between the vibration frequency of the conveyor belt and the standard vibration frequency is less than or equal to the frequency difference evaluation value, the analysis and control module determines that the frequency difference is small, the vibration frequency of the conveyor belt is close to the preset standard vibration frequency, and the cylinder vibration device is at an appropriate vibration frequency.

[0069] Among them, the preset standard vibration frequency is the natural vibration frequency of the food, and those skilled in the art can match the natural vibration frequency with the specific type of food.

[0070] Specifically, due to the impact of the cylinder, the surface of the conveyor belt may be worn or locally deformed near the impact point, causing local thinning, tearing or damage to the conveyor belt, thereby affecting its service life and performance; and in the process of conveying food, if the food sticks together, the surface contact area between the food and the preservative liquid will be reduced, affecting the degree of preservation of the food; this control system detects the vibration frequency and vibration amplitude of the conveyor belt in the conveying module, determines the vibration degree of the cylinder vibration device, and adjusts the vibration parameters of the cylinder vibration device accordingly, controls the vibration amplitude of the conveyor belt, and controls the vibration frequency of the conveyor belt to be close to the natural vibration frequency of the food, thereby generating a resonance phenomenon, preventing the food from sticking and accumulating, thereby increasing the transportation efficiency of the food and the integrity of the food immersed in the preservative liquid.

[0071] The fresh-keeping liquid is composed of a fresh-keeping agent and physiological saline. The detection module detects the concentration of the fresh-keeping liquid by real-time detection of the content of the fresh-keeping agent in the fresh-keeping liquid. The analysis and control module compares the concentration of the fresh-keeping liquid with the concentration critical value.

[0072] If the concentration of the fresh-keeping liquid is less than the critical concentration value, the analysis and control module determines that the content of the fresh-keeping agent in the fresh-keeping liquid is low, and sends a signal to the circulation module to control the circulation pump to increase the content of the fresh-keeping agent in the fresh-keeping liquid;

[0073] If the concentration of the fresh-keeping liquid is greater than the critical concentration value, the analysis and control module calculates the concentration decrease rate according to the decrease in the fresh-keeping liquid concentration per unit time.

[0074] Among them, if the rate of decrease of the concentration of the fresh-keeping liquid is less than the standard rate of decrease, the analysis and control module determines that the rate at which the food consumes the preservative in the fresh-keeping liquid is slow, and increases the cycle period of the circulation module to replace the fresh-keeping liquid according to the ratio of the standard rate of decrease to the rate of decrease of the fresh-keeping liquid concentration;

[0075] If the rate of decrease in the concentration of the preservative liquid is greater than the standard rate of decrease, the analysis and control module determines that the food consumes the preservative in the preservative liquid faster, and reduces the cycle period of the circulation module to replace the preservative liquid according to the ratio of the standard rate of decrease to the rate of decrease in the concentration of the preservative liquid.

[0076] The preservative is an antioxidant such as vitamin C or vitamin E, the critical concentration value is the minimum value of the preservative in the preservative solution at which the preservative can play a preservative role, and the standard decrease rate can be extracted from historical data of the preservative solution concentration during system operation.

[0077] Specifically, the preservative in the preservative liquid can prevent the oxidation of fat, protein and other ingredients in food, thereby extending the shelf life of the food. This control system determines the preservative ability of the preservative liquid by detecting the content of the preservative in the preservative liquid, controls the amount of preservative liquid used, and avoids excessive use; and predicts the degree of consumption of the preservative in the preservative liquid by calculating the rate of decrease in the concentration of the preservative liquid, adjusts the circulation cycle of the preservative liquid, and improves the accuracy of preserving the food.

[0078] The detection device detects the solution temperature of the fresh-keeping solution in real time, and the analysis control unit draws a temperature change curve according to the solution temperature of the fresh-keeping solution and obtains the derivative function of the temperature change curve.

[0079] If the solution temperature in the temperature change curve at any moment is greater than the temperature critical value, and the value of the derivative function at any moment is greater than zero, the analysis control unit determines that the solution temperature of the fresh-keeping solution exceeds the fresh-keeping temperature range and is still rising continuously, and sends a signal to the cooling device to reduce the solution temperature of the fresh-keeping solution according to the product of the ratio of the temperature critical value to the solution temperature and the derivative function value;

[0080] If the value of the derivative function at any moment is less than or equal to zero, the analysis and control unit determines that the solution temperature of the fresh-keeping solution remains unchanged or is decreasing, and sends a signal to the cooling device to reduce the solution temperature of the fresh-keeping solution according to the ratio of the temperature critical value to the solution temperature;

[0081] If the solution temperature in the temperature change curve at any moment is less than or equal to the temperature critical value, the analysis control unit determines that the solution temperature of the fresh-keeping solution is within the fresh-keeping temperature range.

[0082] The critical temperature value is the temperature required for food preservation.

[0083] Specifically, a single preservation technology may not necessarily meet consumers' increasingly upgraded high-quality demands. This control system determines the changing trend of the solution temperature of the preservative liquid by drawing a temperature change curve and obtaining the derivative function. According to the different changing trends of the solution temperature, the cooling device is controlled to adjust the solution temperature of the preservative liquid to different degrees. Two or more preservation methods are used for composite preservation to achieve a synergistic preservation effect, which further improves the accuracy of food preservation.

[0084] The present invention also provides a food preservation equipment control method, comprising:

[0085] Step S1: The food is transported to the circulation module through the transport module, and the food is immersed in the fresh-keeping liquid to keep it fresh. During the food transportation process, the cylinder vibration device of the transport module impacts the conveyor belt at a standard vibration frequency;

[0086] Step S2, determining the vibration degree of the conveyor belt and adjusting the vibration parameters of the cylinder vibration device according to the vibration degree;

[0087] Step S3, monitoring the concentration of the fresh-keeping solution in real time, maintaining the concentration of the fresh-keeping solution by quantitatively replenishing the fresh-keeping agent, and replacing the fresh-keeping solution regularly according to the cycle;

[0088] Step S4, determining the preservation capacity of the fresh-keeping liquid, and predicting the degree of consumption of the preservative in the fresh-keeping liquid, adjusting the circulation period of the fresh-keeping liquid and increasing the content of the preservative in the fresh-keeping liquid according to the degree of consumption of the preservative;

[0089] Step S5, detecting the solution temperature of the fresh-keeping solution, determining a change trend of the solution temperature of the fresh-keeping solution, and adjusting the solution temperature of the fresh-keeping solution to different degrees according to different change trends of the solution temperature;

[0090] Step S6: After the preservation treatment is completed, the food is transported to the discharge port by the conveyor belt, and the food is packaged in a modified atmosphere and sterilized for storage;

[0091] The standard vibration frequency is the natural vibration frequency of the food; and the vibration parameters include vibration amplitude and vibration frequency.

[0092] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0093] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A food preservation equipment control system, characterized in that: include, The conveying module includes a conveyor belt and a cylinder vibration device. The conveyor belt is located inside the immersion tank to constrain the food below the liquid level of the immersion tank. The cylinder vibration device impacts the conveyor belt at a standard vibration frequency to drive the food to vibrate. A circulation module, comprising a circulation pump, a liquid storage tank, a soaking tank, and a filter screen. The circulation pump pumps the fresh-keeping liquid in the liquid storage tank into the soaking tank. The filter screen is used to remove food debris from the fresh-keeping liquid. The fresh-keeping liquid circulates in the liquid storage tank and the soaking tank. A detection module, which includes a laser vibrometer, a temperature sensor, and a mass spectrometer, is used to detect the vibration frequency and amplitude of the conveyor belt in the conveying module, the solution temperature of the fresh-keeping liquid, and the content of the preservative in the fresh-keeping liquid, and transmit the detection data to the analysis and control module; The analysis and control module is used to determine the vibration level of the conveyor belt and adjust the vibration parameters of the cylinder vibration device according to the vibration level of the conveyor belt; calculate the concentration of the fresh-keeping liquid and the rate of concentration decrease, determine the degree of fresh-keeping liquid consumption based on the rate of concentration decrease, and adjust the cycle of fresh-keeping liquid replacement; draw a temperature change curve of the fresh-keeping liquid solution temperature, determine the change trend of the fresh-keeping liquid temperature based on the derivative function of the temperature change curve, and control the cooling unit to maintain the temperature within the food preservation temperature range; A cooling device for adjusting the temperature of the preservative liquid; Modified atmosphere packaging module, used to input inert gas to package food in edible film; The sterilization and storage module is used to sterilize and store packaged food using ultraviolet light.

2. The food preservation equipment control system according to claim 1, characterized in that: The detection module performs non-contact vibration measurement using a laser vibrometer to detect the vibration frequency and vibration amplitude of the conveyor belt in the conveying module. The analysis and control module compares the vibration amplitude of the conveyor belt with the maximum vibration amplitude. If the vibration amplitude of the conveyor belt is greater than the maximum vibration amplitude, the analysis and control module determines that the vibration amplitude of the conveyor belt is too large, and adjusts the air pressure of the cylinder vibration device to change the impact force caused by the cylinder vibration device on the conveyor belt, thereby reducing the vibration amplitude of the conveyor belt; If the vibration amplitude of the conveyor belt is less than or equal to the maximum vibration amplitude, the analysis and control module determines that the vibration amplitude of the conveyor belt is moderate.

3. The food preservation equipment control system according to claim 2, characterized in that: When the vibration amplitude of the conveyor belt is less than or equal to the maximum vibration amplitude, the analysis and control module compares the vibration frequency of the conveyor belt with a preset standard vibration frequency, and calculates the frequency difference between the vibration frequency of the conveyor belt and the standard vibration frequency. If the frequency difference between the vibration frequency of the conveyor belt and the standard vibration frequency is greater than the frequency difference evaluation value, the analysis and control module determines that the frequency difference between the vibration frequency of the conveyor belt and the preset standard vibration frequency is large.

4. The food preservation equipment control system according to claim 3, characterized in that: When the frequency difference between the vibration frequency of the conveyor belt and the standard vibration frequency is greater than the frequency difference evaluation value, If the vibration frequency of the conveyor belt is greater than the standard vibration frequency, the analysis and control module controls the conveying module to reduce the vibration frequency of the cylinder vibration device according to the ratio of the frequency difference evaluation value to the frequency difference.

5. The food preservation equipment control system according to claim 1, characterized in that: The detection module detects the concentration of the fresh-keeping liquid by real-time detection of the content of the fresh-keeping agent in the fresh-keeping liquid, and the analysis and control module compares the concentration of the fresh-keeping liquid with the concentration critical value. If the concentration of the fresh-keeping liquid is less than the critical concentration value, the analysis and control module determines that the content of the fresh-keeping agent in the fresh-keeping liquid is low, and sends a signal to the circulation module to control the circulation pump to increase the content of the fresh-keeping agent in the fresh-keeping liquid; If the concentration of the fresh-keeping liquid is greater than the critical concentration value, the analysis and control module calculates the concentration decreasing speed according to the decreasing amount of the fresh-keeping liquid concentration per unit time.

6. The food preservation equipment control system according to claim 5, characterized in that: When the concentration of the fresh-keeping liquid is greater than the critical concentration value, if the rate of decrease of the fresh-keeping liquid concentration is less than the standard rate of decrease, the analysis and control module determines that the rate at which the food consumes the preservative in the fresh-keeping liquid is slow, and increases the cycle period of the circulation module to replace the fresh-keeping liquid according to the ratio of the standard rate of decrease to the rate of decrease of the fresh-keeping liquid concentration; If the rate of decrease in the concentration of the preservative liquid is greater than the standard rate of decrease, the analysis and control module determines that the food consumes the preservative in the preservative liquid faster, and reduces the cycle period of the circulation module to replace the preservative liquid according to the ratio of the standard rate of decrease to the rate of decrease in the concentration of the preservative liquid.

7. The food preservation equipment control system according to claim 1, characterized in that: The detection device detects the solution temperature of the fresh-keeping liquid in real time, and the analysis control unit draws a temperature change curve according to the solution temperature of the fresh-keeping liquid and obtains the derivative function of the temperature change curve. If the solution temperature in the temperature change curve at any moment is greater than the temperature critical value, the analysis control unit determines that the solution temperature of the fresh-keeping solution exceeds the fresh-keeping temperature range; If the solution temperature in the temperature change curve at any moment is less than or equal to the temperature critical value, the analysis control unit determines that the solution temperature of the fresh-keeping solution is within the fresh-keeping temperature range.

8. The food preservation equipment control system according to claim 1, characterized in that: When the solution temperature exceeds the preservation temperature range, if the value of the derivative function is greater than zero, the analysis and control unit determines that the solution temperature of the preservation solution is still continuously rising; If the value of the derivative function is less than or equal to zero, the analysis and control unit determines that the solution temperature of the fresh-keeping solution remains unchanged or is decreasing.

9. The food preservation equipment control system according to claim 1, characterized in that: When the temperature of the fresh-keeping solution continues to rise, the analysis control unit sends a signal to the cooling device to reduce the temperature of the fresh-keeping solution according to the product of the ratio of the temperature critical value to the solution temperature and the derivative function value; When the temperature of the fresh-keeping solution remains unchanged or is decreasing, the analysis control unit sends a signal to the cooling device to reduce the temperature of the fresh-keeping solution according to the ratio of the temperature critical value to the solution temperature.

10. A method for controlling food preservation equipment using the food preservation equipment control system according to any one of claims 1 to 9, characterized in that: include, Step S1: The food is transported to the circulation module through the transport module, and the food is immersed in the fresh-keeping liquid to keep it fresh. During the food transportation process, the cylinder vibration device of the transport module impacts the conveyor belt at a standard vibration frequency; Step S2, determining the vibration degree of the conveyor belt and adjusting the vibration parameters of the cylinder vibration device according to the vibration degree; Step S3, monitoring the concentration of the fresh-keeping solution in real time, maintaining the concentration of the fresh-keeping solution by quantitatively replenishing the fresh-keeping agent, and replacing the fresh-keeping solution regularly according to the cycle; Step S4, determining the preservation capacity of the fresh-keeping liquid, and predicting the degree of consumption of the preservative in the fresh-keeping liquid, adjusting the circulation period of the fresh-keeping liquid and increasing the content of the preservative in the fresh-keeping liquid according to the degree of consumption of the preservative; Step S5, detecting the solution temperature of the fresh-keeping solution, determining a change trend of the solution temperature of the fresh-keeping solution, and adjusting the solution temperature of the fresh-keeping solution to different degrees according to different change trends of the solution temperature; Step S6: After the preservation treatment is completed, the food is transported to the discharge port by the conveyor belt, and the food is packaged in a modified atmosphere and sterilized for storage; The standard vibration frequency is the natural vibration frequency of the food; and the vibration parameters include vibration amplitude and vibration frequency.

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