Low-voltage monopole electric field

Abstract

The invention discloses a low-voltage unipolar electric field which comprises a low-voltage electric field used for preservation, an Internet of Things module, and a main control loop and an input loop connected with the low-voltage electric field, and relates to the technical field of electric field preservation. According to the low-voltage unipolar electric field, the negative ion coverage range is expanded through the gradient porous electrode, and cooperative control over electric field parameters, humidity and sterilization is achieved in combination with the self-adaptive fuzzy PID algorithm and the multi-sensor data fusion technology. The Internet of Things module is introduced to support remote monitoring and big data optimization, compared with the prior art, energy is saved by more than 30%, and the fresh-keeping period is prolonged by 15%-25%.

Description

Technical Field

[0001] The present invention relates to the technical field of electric field preservation, and specifically to a low-voltage monopolar electric field. Background Art

[0002] Traditional food preservation methods, such as refrigeration and modified atmosphere packaging, although they can extend the shelf life of food, face challenges such as high energy consumption and limited preservation effects. To solve these problems, technicians have been continuously exploring new preservation technologies. For example, Patent No. CN118489675A proposes a method for preserving Phalaenopsis cut flowers by activating hypochlorous acid electrolytic preservation solution using a low-voltage electrostatic field. This method forms a negative ion environment through a low-voltage electrostatic field, changes the electric field distribution on the surface of the cut flowers, activates the activity of hypochlorous acid electrolyzed water, kills bacteria, reduces microbial contamination, and reduces water loss by means of the weak adsorption force of the electric field, maintains a low respiration level of cells, and keeps the water metabolism of the cut flowers.

[0003] However, the above Patent No. CN118489675A releases negative ions through a low-voltage electrostatic field to inhibit the growth of microorganisms, but has the following defects: The electric field parameters (intensity, frequency) are fixed and cannot be dynamically adjusted according to the environment, resulting in low energy efficiency; It only relies on the control of a single parameter of temperature and humidity and does not consider the influence of gas components (such as ethylene, CO2) on preservation; It lacks remote monitoring and data-driven optimization strategies, and the level of intelligence is insufficient. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a low-voltage monopolar electric field, which solves the problems that the electric field parameters (intensity, frequency) are fixed and cannot be dynamically adjusted according to the environment, resulting in low energy efficiency; it only relies on the control of a single parameter of temperature and humidity and does not consider the influence of gas components (such as ethylene, CO2) on preservation; it lacks remote monitoring and data-driven optimization strategies, and the level of intelligence is insufficient.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A low-voltage monopolar electric field includes a low-voltage electric field for preservation, an Internet of Things module, as well as a main control circuit and an input circuit connected to the low-voltage electric field; The low-voltage electric field module includes low-voltage pulsed electric field Ⅰ and low-voltage pulsed electric field Ⅱ. The pulsed electric field intensity range of the low-voltage pulsed electric field Ⅰ and the low-voltage pulsed electric field Ⅱ is 20 - 1000 kV / m, and the pulsed frequency range is 50 - 200 Hz. The electrodes of the low-voltage pulsed electric field Ⅰ and the low-voltage pulsed electric field Ⅱ adopt a gradient porous structure, and the surface is coated with a titanium dioxide nano-catalytic coating; The main control circuit includes a PLC controller, a power supply module, a relay module, a temperature and humidity sensor, and a gas sensor; The PLC controller integrates an adaptive fuzzy PID algorithm, collects temperature and humidity data through temperature and humidity sensors, and detects the concentrations of ethylene and CO2 through gas sensors; The power supply module adopts pulse width modulation (PWM) technology and is electrically connected to the low-voltage electric field, PLC controller, and relay module; The PLC controller is also connected to an atomizer and a sterilization device. The relay module is linked with the atomizer and sterilization device, and adjusts the electric field strength, atomization amount, and sterilization cycle according to the instructions of the PLC controller; The input circuit includes a touch screen, a screen switch, a preservation switch, indicator light Ⅰ, and indicator light Ⅱ; The touch screen has a built-in threshold self-learning function, displays the gas concentration interface, and integrates an audible and visual alarm module; Indicator light Ⅰ is a green indicator light, indicating qualified preservation; indicator light Ⅱ is a red indicator light, indicating unqualified preservation; The Internet of Things module includes a WiFi / 4G communication unit and a cloud platform; The WiFi / 4G communication unit uploads environmental data to the cloud platform, supporting remote monitoring and the issuance of parameter optimization suggestions.

[0006] Preferably, the implementation of the adaptive fuzzy PID algorithm includes the following steps: a) Collect environmental parameters through temperature and humidity sensors and gas sensors, and perform normalization processing; b) Calculate the fuzzy correction factor according to the error between the preset threshold and the real-time data and the error change rate; c) Dynamically adjust the PID parameters (proportional, integral, and differential coefficients), and output control instructions to the low-voltage electric field 1 module, atomizer, and sterilization device.

[0007] Preferably, the cloud platform of the Internet of Things module supports the following functions: Communicate with the PLC controller through the MQTT protocol, receive real-time data, and store it in the blockchain database; b) Generate equipment maintenance warnings based on historical data and predict the service life of the power supply module and relay module; c) Dynamically adjust the operating parameters of the low-voltage electric field in combination with meteorological data.

[0008] Preferably, the pore diameter of the gradient porous electrode gradually increases from the electrode center to the edge, and the pore diameter gradient is 50 - 200 μm; The titanium dioxide nanocatalytic coating generates a photocatalytic reaction under the activation of the electric field to decompose ethylene gas.

[0009] Preferably, the threshold self-learning function of the touch screen is realized in the following way: Record the operation frequencies of the freshness preservation switch and the screen switch and the parameter adjustment ranges; Optimize the preset temperature, humidity, and gas concentration thresholds through a machine learning model; c) When the environmental data exceeds the learning threshold, trigger the sound and light alarm module.

[0010] Preferably, the PWM modulation technology of the power supply module is specifically as follows: Adjust the pulse duty cycle according to the load demand signal output by the PLC controller; When the low-voltage electric field module operates at a low intensity, the duty cycle is reduced to 30%-50%; c) When a voltage fluctuation is detected, automatically switch to the backup power supply and feedback a fault code to the touch screen (31).

[0011] The present invention provides a low-voltage monopolar electric field. Compared with the prior art, it has the following beneficial effects: 1. For this low-voltage monopolar electric field, the negative ion coverage range is expanded through a gradient porous electrode. Combining the adaptive fuzzy PID algorithm and the multi-sensor data fusion technology, the collaborative control of electric field parameters, humidity, and sterilization is realized. The introduction of the Internet of Things module supports remote monitoring and big data optimization. Compared with the prior art, the energy consumption is reduced by more than 3%, and the freshness preservation period is extended by 15%-25%. Thus, the problems that the electric field parameters (intensity, frequency) are fixed and cannot be dynamically adjusted according to the environment, resulting in low energy efficiency; only relying on the single parameter control of temperature and humidity and not considering the influence of gas components (such as ethylene, CO2) on freshness preservation; lacking remote monitoring and data-driven optimization strategies, and the intelligent level is insufficient are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the electrical connection of the present invention; Figure 2 It is a second schematic diagram of the electrical connection of the present invention; Figure 3 It is a schematic diagram of the touch screen of the present invention.

[0013] In the figure: 1. Low-voltage electric field; 11. Low-voltage pulse electric field I; 12. Low-voltage pulse electric field II; 2. Main control circuit; 21. PLC controller; 22. Power supply module; 23. Relay module; 24. Temperature and humidity sensor; 25. Gas sensor; 3. Input circuit; 31. Touch screen; 311. Gas concentration interface; 312. Sound and light alarm module; 32. Screen switch; 33. Freshness preservation switch; 34. Indicator light I; 35. Indicator light II; 4. Internet of Things module; 41. WiFi / 4G communication unit; 42. Cloud platform. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0015] Embodiment 1 Low-voltage monopolar electric field system Please refer to Figures 1-3 , the embodiments of the present invention provide a technical solution: a low-voltage monopolar electric field, including a low-voltage electric field 1 for freshness preservation, an Internet of Things module 4, as well as a main control circuit 2 and an input circuit 3 connected to the low-voltage electric field 1; The low-voltage electric field 1 includes a low-voltage pulsed electric field I 11 and a low-voltage pulsed electric field II 12. The pulsed electric field intensity range of the low-voltage pulsed electric field I 11 and the low-voltage pulsed electric field II 12 is 20 - 1000 kV / m, and the pulsed frequency range is 50 - 200 Hz. The electrodes of the low-voltage pulsed electric field I 11 and the low-voltage pulsed electric field II 12 adopt a gradient porous structure 111, and the surface is coated with a titanium dioxide nano-catalytic coating; The main control circuit 2 includes a PLC controller 21, a power supply module 22, a relay module 23, a temperature and humidity sensor 24, and a gas sensor 25; The PLC controller 21 integrates an adaptive fuzzy PID algorithm, collects temperature and humidity data through the temperature and humidity sensor 24, and detects the ethylene and CO2 concentrations through the gas sensor 25; The power supply module 22 adopts pulse width modulation PWM technology and is electrically connected to the low-voltage electric field 1, the PLC controller 21, and the relay module 23; The PLC controller (21) is also connected to an atomizer and a sterilization device. The relay module 23 is linked with the atomizer and the sterilization device, and adjusts the electric field intensity, atomization amount, and sterilization cycle according to the instructions of the PLC controller 21; The input circuit 3 includes a touch screen 31, a screen switch 32, a freshness preservation switch 33, an indicator light I 34, and an indicator light II 35; The touch screen 31 has a built-in threshold self-learning function, displays a gas concentration interface 311, and integrates an acoustic and optical alarm module 312; The indicator light I 34 is a green indicator light, indicating qualified freshness preservation; the indicator light II 35 is a red indicator light, indicating unqualified freshness preservation; The Internet of Things module 4 includes a WiFi / 4G communication unit 41 and a cloud platform 42; The WiFi / 4G communication unit 41 uploads environmental data to the cloud platform 42, and supports remote monitoring and the issuance of parameter optimization suggestions.

[0016] Preferably, the implementation of the adaptive fuzzy PID algorithm includes the following steps: a) Collect environmental parameters through the temperature and humidity sensor 24 and the gas sensor 25, and perform normalization processing; b) Calculate the fuzzy correction factor according to the error between the preset threshold and the real-time data and the error change rate; c) Dynamically adjust the PID parameters (proportional, integral, and differential coefficients), and output control instructions to the low-voltage electric field 1, the atomizer, and the sterilization device.

[0017] Preferably, the cloud platform 42 of the Internet of Things module 4 supports the following functions: Communicate with the PLC controller 21 through the MQTT protocol, receive real-time data, and store it in the blockchain database; b) Generate equipment maintenance warnings based on historical data, and predict the service life of the power supply module 22 and the relay module 23; c) Dynamically adjust the operating parameters of the low-voltage electric field 1 in combination with meteorological data.

[0018] Preferably, the pore diameter of the gradient porous electrode gradually increases from the electrode center to the edge, and the pore diameter gradient is 50 - 200 μm; The titanium dioxide nanocatalytic coating generates a photocatalytic reaction under the activation of the electric field to decompose ethylene gas.

[0019] Preferably, the threshold self-learning function of the touch screen 31 is realized in the following way: Record the operation frequencies of the user on the freshness-keeping switch 33 and the screen switch 32 and the parameter adjustment range; Optimize the preset temperature, humidity, and gas concentration thresholds through a machine learning model; c) When the environmental data exceeds the learning threshold, trigger the sound and light alarm module 312.

[0020] Preferably, the PWM modulation technology of the power supply module 22 is specifically as follows: Adjust the pulse duty cycle according to the load demand signal output by the PLC controller 21; When the low-voltage electric field 1 is operating at a low intensity, the duty cycle is reduced to 30% - 50%; c) When a voltage fluctuation is detected, automatically switch to the backup power supply and feedback a fault code to the touch screen 31.

[0021] System configuration Low-voltage electric field module 1: Low-voltage pulsed electric fields Ⅰ11 and Ⅱ12: Vertically and staggeredly installed on the top of the cabinet, with an electric field intensity of 800 kV / m and a frequency of 150 Hz; Gradient porous electrode: The pore diameter gradient is 50 - 150 μm, and the surface is coated with a titanium dioxide nano-coating (thickness 200 nm).

[0022] Main control circuit 2: PLC controller 21: Embedded with an adaptive fuzzy PID algorithm, preset parameters: temperature 0 - 4°C, humidity 85% - 90%, H2S concentration < 10 ppm; Power supply module 22: PWM modulation, initial duty cycle 70%, supporting dual - power redundancy; Relay module 23: Linked with the atomizer and ozone sterilization device; Temperature and humidity sensor 24, gas sensor 25: Real - time monitoring of the environment inside the cabinet.

[0023] Input circuit 3: Touch screen 31: Displays the real - time data gas concentration interface 311, preset with "meat preservation mode"; Acousto - optic alarm module 312: Threshold set to H2S concentration ≥ 15 ppm; Indicator light Ⅰ34 (green), indicator light Ⅱ35 (red): Indicate qualified / abnormal preservation respectively.

[0024] Internet of Things module 4: WiFi / 4G communication unit 41: Connects to the cloud platform 42 via WiFi, data upload interval is 5 minutes; Cloud platform 42: Stores data in the blockchain and analyzes the health status of the device.

[0025] Working principle and process 1. System startup and initialization: The operator turns on the system through the screen switch 32, and sets the preservation switch 33 to the automatic mode; The power supply module 22 starts PWM output with a duty cycle of 70% to supply power to the low - voltage electric field 1; The gradient porous electrode releases negative ions under the action of the electric field, and at the same time, the titanium dioxide coating activates the photocatalytic reaction under the cold cabinet LED lighting to decompose volatile organic compounds.

[0026] 2. Data acquisition and dynamic regulation: Environmental monitoring: The temperature and humidity sensor 24 detects that the temperature inside the cabinet rises to 5°C (exceeding the preset threshold of 4°C); The gas sensor 25 detects that the H2S concentration is 12 ppm (close to the alarm threshold). [[ID=X]]

[0027] Adaptive algorithm response: The PLC controller 21 executes the fuzzy PID algorithm; Error calculation: Temperature error ΔT = 1°C, H2S concentration error ΔC = 2 ppm; Fuzzy correction: According to the error change rate (ΔT / Δt = 0.2°C / min), adjust the proportionality coefficient Kp to increase by 20%; Output instruction: Increase the intensity of the low - voltage pulse electric field Ⅰ11 and the low - voltage pulse electric field Ⅱ12 to 1000 kV / m, frequency to 200 Hz. The relay module 23 starts the ozone sterilization device to work for 10 minutes; The atomizer humidifies to 92% to inhibit the activity of microorganisms.

[0028] Energy efficiency optimization: According to the load demand, the power supply module 22 dynamically adjusts the PWM duty cycle to 65%, reducing energy consumption by 18%.

[0029] 3. IoT collaboration and warning: The WiFi / 4G communication unit 41 encrypts and uploads the data exceeding the threshold to the cloud platform 42 to generate a blockchain certificate; the cloud analyzes historical data, detects that the daily average load rate of the power supply module 22 exceeds 85%, and pushes "It is recommended to check the power supply life" to the administrator's mobile APP; the gas concentration interface 311 of the touch screen 31 displays the H2S trend curve, and the sound and light alarm module 312 triggers intermittent beeping.

[0030] 4. Fault tolerance and feedback: If the main power supply is abnormal, the power supply module 22 switches to the backup power supply within 0.3 seconds and sends the fault code "E01" to the touch screen 31 and the cloud platform 42 through the WiFi / 4G communication unit 41; the red light of the indicator light II 35 flashes until the maintenance personnel handle it on-site.

[0031] The experimental data and effects are as follows in the table;

[0032] The beneficial effects of the present invention are summarized as follows: Significantly extend the preservation period By releasing high-density negative ions through the gradient porous electrode and combining photocatalytic decomposition of harmful gases (such as ethylene, H2S), the data of the embodiment shows that: the preservation period is extended from 7 days to 12 days (a 71% increase); The viewing period is extended from 7 days to 12 days, and the total number of bacteria is reduced to 1 / 60 of the traditional scheme (3×10³CFU / g vs. 2×10 5 CFU / g).

[0033] Efficient and energy-saving operation, the power supply module 22 adopts PWM dynamic voltage regulation technology and combines cloud energy efficiency strategy optimization: the daily average energy consumption is reduced by 35.6% (8.5 kWh vs. 13.2 kWh of the traditional one), and the duty cycle can be reduced to 30%-50% under low load, reducing the ineffective power consumption.

[0034] Precise environmental control Multi-parameter collaborative regulation (temperature and humidity, gas concentration, illumination): The adaptive fuzzy PID algorithm (PLC controller 21) responds to environmental fluctuations in real time, and the H2S control compliance rate reaches 98% (only 75% in the comparative example); the atomizer sterilization device is linked with the electric field module to inhibit the microbial activity.

[0035] Improve intelligence and reliability The Internet of Things module 4 supports remote monitoring and predictive maintenance: Blockchain evidence storage (cloud platform 42) ensures the credibility of data and is applicable to food traceability; The dual-power redundancy design reduces the fault response time to 0.3 seconds and improves the system reliability by 90%.

[0036] Multi-scenario applicability and scalability The modular design supports multi-scenario adaptation for warehousing, transportation, retail, etc.: Users can customize the mode through the touch screen 31, and the threshold self-learning function optimizes the operation experience.

[0037] Technological integration and innovation Combining the fuzzy control algorithm with electric field preservation to solve the control lag problem of traditional linear PID in nonlinear systems; The photo-electric synergistic effect of gradient porous electrodes and nano-coatings breaks through the bottleneck of the sterilization efficiency of single electric field technology.

[0038] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-voltage monopole electric field, characterized in that: It includes a low-voltage electric field (1) for freshness preservation, an Internet of Things module (4), as well as a main control circuit (2) and an input circuit (3) connected to the low-voltage electric field (1); The low-voltage electric field (1) includes a low-voltage pulsed electric field I (11) and a low-voltage pulsed electric field II (12). The electrodes of the low-voltage pulsed electric field I (11) and the low-voltage pulsed electric field II (12) adopt a gradient porous structure, and the surface is coated with a titanium dioxide nano-catalytic coating; The main control circuit (2) includes a PLC controller (21), a power supply module (22), a relay module (23), a temperature and humidity sensor (24), and a gas sensor (25); The PLC controller (21) is also connected to an atomizer and a sterilization device; The power supply module (22) is electrically connected to the low-voltage electric field module (1), the PLC controller (21), and the relay module (23); The relay module (23) is linked with the atomizer and the sterilization device, and adjusts the electric field intensity, the atomization amount, and the sterilization period according to the instructions of the PLC controller (21); The input circuit (3) includes a touch screen (31), a screen switch (32), a freshness preservation switch (33), an indicator light I (34), and an indicator light II (35); The touch screen (31) includes a gas concentration interface (311) and an acoustic-optic alarm module (312); The Internet of Things module (4) includes a WiFi / 4G communication unit (41) and a cloud platform (42); The WiFi / 4G communication unit (41) uploads environmental data to the cloud platform (42), and supports remote monitoring and the issuance of parameter optimization suggestions.

2. A low-voltage monopole electric field according to claim 1, characterized in that: The PLC controller (21) integrates an adaptive fuzzy PID algorithm, collects temperature and humidity data through the temperature and humidity sensor (24), and detects the ethylene and CO2 concentrations through the gas sensor (25); The implementation of the adaptive fuzzy PID algorithm includes the following steps: a) Collect environmental parameters through the temperature and humidity sensor (24) and the gas sensor (25), and perform normalization processing; b) Calculate a fuzzy correction factor according to the error between the preset threshold and the real-time data and the error change rate; c) Dynamically adjust the PID parameters, and output control instructions to the low-voltage electric field module (1), the atomizer, and the sterilization device.

3. A low-voltage monopolar electric field according to claim 1, characterized in that: The cloud platform (42) of the Internet of Things module (4) supports the following functions: Communicate with the PLC controller (21) through the MQTT protocol, receive real-time data, and store it in the blockchain database; Generate equipment maintenance warnings based on historical data, and predict the service life of the power supply module (22) and the relay module (23); c) Dynamically adjust the operating parameters of the low-voltage electric field module (1) in combination with meteorological data.

4. A low-voltage monopole electric field according to claim 1, wherein: The pore diameter of the gradient porous structure electrode gradually increases from the center of the electrode to the edge, and the pore diameter gradient is 50-200 μm; The titanium dioxide nano-catalytic coating generates a photocatalytic reaction under the activation of the electric field to decompose ethylene gas.

5. A low-voltage monopolar electric field according to claim 1, characterized in that: The threshold self-learning function of the touch screen (31) is realized in the following way: a) Record the operation frequencies of the user on the freshness preservation switch (33) and the screen switch (32) and the parameter adjustment ranges; b) Optimize the preset temperature and humidity, and gas concentration thresholds through a machine learning model; c) When the environmental data exceeds the learned threshold, trigger the acoustic and optical alarm module (312).

6. A low-voltage monopolar electric field according to claim 1, characterized in that: The PWM modulation technology of the power supply module (22) is specifically as follows: a) Adjust the pulse duty cycle according to the load demand signal output by the PLC controller (21); b) When the low-voltage electric field module (1) is operating at low intensity, the duty cycle is reduced to 30%-50%; c) When a voltage fluctuation is detected, automatically switch to the backup power supply and feedback a fault code to the touch screen (31).

7. A low-voltage monopole electric field according to claim 1, characterized in that: The pulse electric field intensity range of the low-voltage pulse electric field I (11) and the low-voltage pulse electric field II (12) is 20-1000 kV / m, and the pulse frequency range is 50-200 Hz.

8. A low-voltage monopolar electric field according to claim 1, characterized in that: The indicator light I (34) is a green indicator light, indicating qualified preservation; the indicator light II (35) is a red indicator light, indicating unqualified preservation.

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