Ultraviolet light and low-temperature plasma synergistic disinfection control system

Abstract

The invention discloses an ultraviolet light and low-temperature plasma cooperative disinfection control system, and belongs to the field of intelligent disinfection, the system is composed of a main controller, a disinfection unit, a detection unit, a conveyor belt controller, an Internet of Things platform and a 4G module, and the disinfection unit comprises an ultraviolet sterilization lamp and a low-temperature plasma generation device. The main controller is used for respectively controlling an ultraviolet sterilizing lamp and a low-temperature plasma generating device in the sterilizing unit to synergistically sterilize the to-be-sterilized product on the conveying belt. In the disinfecting and killing process, the main controller obtains the irradiation intensity, plasma concentration, temperature and humidity of the disinfecting and killing environment in real time through the detection unit, the ultraviolet sterilizing lamp and the low-temperature plasma generating device are controlled by combining system preset values, and dynamic adjustment of the disinfecting and killing intensity is achieved. In addition, an operator can check the environmental parameters uploaded by the main controller through the 4G module on the Internet of Things platform, and can remotely regulate and control the disinfection intensity of the system, and finally, accurate and efficient cooperative disinfection is realized.

Description

Technical Field

[0001] The invention belongs to the field of intelligent disinfection and invents a control system for coordinated disinfection using ultraviolet light and low-temperature plasma. Background Art

[0002] At a time when public health and health protection are highly valued, food safety has become a topic of particular concern to the general public. Disinfection technology is the key to building a food safety defense line. Currently, the mainstream disinfection methods on the market are divided into three types: physical, chemical and biological disinfection, but the effect of a single disinfection technology is poor and may even damage product quality.

[0003] Low-temperature plasma is a state of existence of matter, composed of a large number of free electrons, ions, free radicals and neutral particles, and is electrically neutral as a whole. Low-temperature plasma disinfection technology is emerging in the field of disinfection with its unique physical and chemical properties. Low-temperature plasma can destroy the structural integrity of microbial cell walls and cell membranes, thereby achieving a sterilization effect. However, this invasive disinfection process requires low-temperature plasma to have sufficient attachment time on the surface of the product to gradually disintegrate the outer layer of pollutants in the product. Ultraviolet light irradiation in the UVC band also has a good disinfection effect and is a means of disinfection with strong ability among traditional methods. Ultraviolet light achieves disinfection by destroying the nucleic acid structure of microorganisms. With sufficient irradiation time, it can kill most common pathogens, and has no toxic byproducts, which is green and efficient.

[0004] Low-temperature plasma disinfection requires high plasma concentration, and the preparation device needs to be adjusted according to the product type and environmental parameters. In the process of ultraviolet irradiation disinfection, irradiation intensity control is the key. If the intensity is weak, microorganisms may be revived by light; if the intensity is strong, the biological activity of the product will be reduced. Therefore, an efficient control system is crucial to the disinfection process. Summary of the invention

[0005] The main content of the present invention is a control system for coordinated disinfection of ultraviolet light and low-temperature plasma, which can independently control the ultraviolet sterilization lamp and the low-temperature plasma generator, and then adjust the ultraviolet radiation intensity and low-temperature plasma concentration during the disinfection process, so as to achieve the effect of complementary advantages of ultraviolet disinfection and low-temperature plasma disinfection, and improve the coordinated disinfection process. At the same time, the Internet of Things technology is used to develop remote monitoring and control functions, overcome the shortcomings of previous technologies in real-time and comprehensiveness, fill the technical gap in the field of intelligent disinfection, and help build a healthy China.

[0006] To achieve the above-mentioned purpose, the present invention proposes a control system for coordinated disinfection of ultraviolet light and low-temperature plasma; the characteristics are: comprising a main controller, a disinfection unit, a detection unit, a conveyor belt controller, a 4G module and an Internet of Things platform; The disinfection unit includes an ultraviolet sterilization lamp and a low-temperature plasma generating device; The detection unit includes an ultraviolet radiation intensity sensor, a plasma concentration sensor and a temperature and humidity sensor; The Internet of Things platform visualizes the data uploaded by the main controller and can remotely control the main controller to adjust the disinfection intensity of the disinfection unit.

[0007] Preferably, the main controller is electrically connected to the ultraviolet sterilization lamp, low-temperature plasma generator, detection unit, conveyor belt controller and 4G module, and uses RS485 bus communication to send instructions, thereby achieving independent control of each part.

[0008] Preferably, the main controller can regulate the ultraviolet sterilization lamp, low-temperature plasma generator and conveyor belt controller in the sterilization unit. In the coordinated sterilization process, the sterilization intensity can be adjusted according to the actual sterilization scene requirements, which is specifically reflected in that the main controller can regulate the irradiation intensity of the ultraviolet sterilization lamp, the preparation process of the low-temperature plasma generator and the conveying speed of the conveyor belt.

[0009] Preferably, the detection unit receives the query instruction sent by the main controller and reports the ultraviolet radiation intensity, plasma concentration, and environmental temperature and humidity data. The detection unit is installed inside the device to monitor the disinfection environment in real time.

[0010] Preferably, the IoT platform obtains data collected by the main controller through a 4G module, including ultraviolet radiation intensity, plasma concentration, temperature and humidity, and displays them visually. In addition, the IoT platform can remotely send instructions to the main controller to control the disinfection unit.

[0011] Preferably, the main controller will enter the disinfection mode selection interface after the boot animation, and the user can choose to use the built-in disinfection plan or a customized disinfection plan.

[0012] Preferably, the main controller obtains the ultraviolet radiation intensity value and plasma concentration value in real time, compares them with the preset values, and adjusts the output of the ultraviolet sterilization lamp and the low-temperature plasma generator through the fuzzy control algorithm to make the disinfection intensity reach the preset value. The parameters are optimized in combination with the disinfection results of the system and saved in the disinfection plan being used.

[0013] Preferably, the main controller communicates data with the detection unit in a polling manner, and the query instruction includes the preset address of the corresponding unit. The corresponding unit will return data to the main controller only after the address matches; the main controller and the Internet of Things platform adopt wireless communication, and the 4G module converts the detected data into JSON format data packets and reports them to the Internet of Things platform using the MQTT protocol.

[0014] Compared with the prior art, the control system for coordinated disinfection of ultraviolet light and low-temperature plasma provided by the present invention has the following beneficial effects: 1. The control system described in the present invention selects a touch screen that is easier to operate as a platform for issuing instructions, and writes a corresponding control interface, which has better human-computer interaction capabilities and is convenient for operators to use.

[0015] 2. The control system described in the present invention is developed using Internet of Things technology, and both the ultraviolet sterilization lamp and the low-temperature plasma generator can be independently controlled. Compared with a single disinfection method, the coordinated disinfection has a wider disinfection range and applicable scenarios, and a stronger disinfection ability. Internet of Things technology enables operators to remotely monitor and control, which increases the safety of operators and makes it easier to maintain the stability of the disinfection environment, in line with the concept of green disinfection.

[0016] 3. The control system described in the present invention belongs to a closed-loop control system. The detection part monitors the disinfection environment in real time. After the main control reads the environmental parameters, it adjusts the output values ​​of the ultraviolet sterilization lamp and the low-temperature plasma generator to make the disinfection environment parameters meet the preset values ​​and ensure the disinfection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a control system for coordinated disinfection of ultraviolet light and low-temperature plasma according to an embodiment of the present invention.

[0018] Figure 2 It is a program flow chart of the detailed use of the main control part of the embodiment of the present invention.

[0019] in: 1-main controller; 2-disinfection unit; 21-ultraviolet sterilization lamp; 22-low-temperature plasma generator; 3-detection unit; 31-ultraviolet radiation intensity sensor; 32-plasma concentration sensor; 33-temperature and humidity sensor; 4-conveyor belt controller; 54-G module; 6-Internet of Things platform. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0021] In the description of the present invention, it should be noted that when an element is referred to as being "mounted on" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] See also Figure 1 The embodiment of the present invention provides a control system for coordinated disinfection of ultraviolet light and low-temperature plasma, which is applied to the actual disinfection of products, and may include but is not limited to a main controller 1, a disinfection unit 2, a detection unit 3, a conveyor belt controller 4, a 4G module 5 and an Internet of Things platform 6; in actual use, multiple groups of disinfection units 2 and detection units 3 can be enabled at the same time.

[0024] Wherein, the disinfection unit 2 includes an ultraviolet sterilization lamp 21 and a low-temperature plasma generating device 22; The detection unit 3 includes an ultraviolet radiation intensity sensor 31, a plasma concentration sensor 32 and a temperature and humidity sensor 33; The Internet of Things platform 6 visualizes the data uploaded by the main controller 1 and can remotely control the main controller 1 to adjust the disinfection intensity of the disinfection unit 2.

[0025] In this embodiment, combined with Figure 2 It can be seen that after the main controller 1 is turned on, it first enters the boot animation, and then automatically enters the user module selection after the boot animation ends. The user can choose a built-in disinfection plan or a custom disinfection plan. Each disinfection plan has a certain ultraviolet radiation intensity, plasma concentration and conveyor belt transmission speed, which can be adjusted and saved on the main controller according to the actual disinfection results.

[0026] In this embodiment, the touch screen model selected by the main controller 1 is MT8106iQ of Weiluntong Company. This product has many advantages such as simple operation, macro compilation, high contact accuracy, low noise, thin and lightweight body, built-in power isolation protection, etc. The touch screen Com2 and Com3 support RS485 communication, built-in RS485 isolator, NEMA4 / IP65 panel protection level, fanless cooling system, etc.

[0027] In this embodiment, the disinfection unit 2 includes an ultraviolet sterilization lamp 21 and a low-temperature plasma generator 22. The main controller 1 and the ultraviolet sterilization lamp 21 and the low-temperature plasma generator 22 are all connected by electrical means, and the RS485 bus communication method is used to send instructions, thereby realizing independent control of each part. At the same time, the main controller 1 and the detection unit 3, the conveyor belt controller 4 and the 4G module 5 are all connected by electrical means, and the RS485 bus communication method is used to send instructions, thereby realizing independent control of each part.

[0028] The main controller 1 can regulate the ultraviolet sterilization lamp 21, the low-temperature plasma generator 22 and the conveyor belt controller 4 in the sterilization unit 2. In the coordinated sterilization process, the sterilization intensity can be adjusted according to the actual sterilization scene requirements, which is specifically reflected in that the main controller 1 can regulate the irradiation intensity of the ultraviolet sterilization lamp 21, the preparation process of the low-temperature plasma generator 22 and the conveying speed of the conveyor belt.

[0029] The wavelength of the UV sterilization lamp 21 is 222nm. Compared with the traditional 254nm wavelength sterilization lamp, it has the same sterilization effect on influenza viruses, bacteria, etc., but it is safer. It can only reach the outermost stratum corneum of the skin, and cannot penetrate the deep layer of the skin and the eyes. It will not damage the eyes and living cells of the human body. It is relatively safe for the human body. It solves the limitation that traditional short-wave ultraviolet rays such as 254nm are harmful to the human body and can only be used in unmanned environments, so that it can also be used in scenes such as indoor public places with people. Unlike some UV sterilization lamps that produce ozone, the 222nm sterilization lamp does not produce ozone during operation, avoiding adverse effects on the human respiratory tract and the environment, and is more in line with the concept of green sterilization.

[0030] In this embodiment, the detection unit 3 may include but is not limited to an ultraviolet radiation intensity sensor 31, a plasma concentration sensor 32 and a temperature and humidity sensor 33. The ultraviolet radiation intensity sensor 31 mainly monitors the ultraviolet radiation intensity during the disinfection process, the plasma concentration sensor 32 is responsible for monitoring the plasma concentration during the disinfection process, and the temperature and humidity sensor 33 mainly monitors the ambient temperature and humidity data during the disinfection process. The detection unit 3 receives the query instruction sent by the main controller 1 and reports the ultraviolet radiation intensity, plasma concentration, and ambient temperature and humidity data. The detection unit 3 is installed inside the device to monitor the disinfection environment in real time.

[0031] Among them, the ultraviolet radiation intensity sensor 31 can accurately monitor the ultraviolet radiation intensity index. The probe uses an optical quartz window to ensure the ultraviolet transmittance, and can display the ultraviolet radiation intensity value in real time on the touch screen. At the same time, the shell design is adapted to a variety of installation environments.

[0032] The plasma concentration sensor 32 is a sensor specialized for continuous monitoring of air environment. It adopts a parallel electrode plate structure, has the advantages of high ion charge conversion efficiency, stable charge collection, high measurement accuracy, strong stability and strong anti-interference ability, and can display the plasma concentration in real time on the touch screen.

[0033] The input power supply, induction probe and signal output of the temperature and humidity sensor 33 are completely isolated, safe and reliable. It uses a high-sensitivity digital probe, with stable signals and high precision. It has the characteristics of wide measurement range, good linearity, good waterproof performance, easy use, easy installation, and long transmission distance. It can display temperature and humidity information in real time on the touch screen.

[0034] In addition, each component of the detection unit can be installed independently. The overall layout and hardware connection only require the corresponding connection of the power line, ground line and main control communication line. There are no other layout requirements, and the installation is more flexible and convenient.

[0035] In this embodiment, the IoT platform 6 includes but is not limited to the use of open source IoT platforms such as ThingsBoard, Alibaba Cloud IoT platform, Huawei Cloud IoT platform, etc., and can also use a host computer platform independently developed by the user for data reception and visualization. The IoT platform exemplified in this embodiment is only a sum of the concepts of a host computer for receiving system data, and does not limit the actual IoT platform used. The IoT platform 6 currently uses the open source platform ThingsBoard, which can be used for device connection, data collection, processing and visualization, etc., and is widely used in smart homes, industrial monitoring and other fields.

[0036] In this embodiment, a communication method combining wired and wireless forms is adopted. Specifically, within the system, the main controller 1 uses RS485 communication method to issue instructions to the generating unit 2, the detecting unit 3, and the conveyor belt controller 4; outside the system, the main controller 1 transmits data to the Internet of Things platform 6 through the 4G module 5 using the MQTT protocol. The Internet of Things platform 6 obtains the data collected by the main controller 1 through the 4G module 5, including ultraviolet radiation intensity, plasma concentration, temperature and humidity, and displays it visually. In addition, the Internet of Things platform 6 can remotely send instructions to the main controller 1 to control the disinfection unit 2.

[0037] The detailed use process of the present invention is as follows: After the system is powered on, the main controller starts and enters the boot animation. After the boot animation ends, it automatically enters the user mode selection. The user can choose the built-in disinfection program mode or the user-defined disinfection program mode. The user-defined disinfection program mode can adjust the parameters of the fan speed, ultraviolet intensity, device height and transmission belt speed. After the user selects the disinfection program, the disinfection module and the conveyor belt start normally. The main controller periodically issues query instructions to the detection unit, obtains the environmental parameters, compares them with the preset values, adjusts the ultraviolet radiation intensity and plasma concentration through the fuzzy control algorithm, so as to reach the preset values, and displays the detection parameters in real time on the interface. The 4G module mounted on the communication line performs data filtering and format conversion, and wirelessly transmits the data packets to the Internet of Things platform. The operator can monitor and operate the disinfection status of the entire system on the platform.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control system for coordinated disinfection of ultraviolet light and low-temperature plasma; characterized in that: It comprises a main controller (1), a disinfection unit (2), a detection unit (3), a conveyor belt controller (4), a 4G module (5) and an Internet of Things platform (6); The sterilization unit (2) comprises an ultraviolet sterilization lamp (21) and a low-temperature plasma generating device (22); The detection unit (3) comprises an ultraviolet radiation intensity sensor (31), a plasma concentration sensor (32) and a temperature and humidity sensor (33); The Internet of Things platform (6) displays the data uploaded by the main controller (1) in a visual manner, and can remotely control the main controller (1) to adjust the intensity of the disinfection unit (2).

2. A control system for coordinated disinfection by ultraviolet light and low-temperature plasma according to claim 1, characterized in that: The main controller (1) and the ultraviolet sterilization lamp (21), the low-temperature plasma generating device (22), the detection unit (3), the conveyor belt controller (4) and the 4G module (5) are all connected in an electrical manner, and use the RS485 bus communication method to send instructions, thereby realizing independent control of each part.

3. The control system for coordinated disinfection by ultraviolet light and low-temperature plasma according to claim 1, characterized in that: The main controller (1) can regulate the ultraviolet sterilization lamp (21), the low-temperature plasma generating device (22) and the conveyor belt controller (4) in the sterilization unit (2); during the coordinated sterilization process, the main controller (1) can regulate the irradiation intensity of the ultraviolet sterilization lamp (21), the preparation process of the low-temperature plasma generating device (22) and the conveying speed of the conveyor belt.

4. The control system for coordinated disinfection by ultraviolet light and low-temperature plasma according to claim 1, characterized in that: The detection unit (3) receives the query instruction sent by the main controller (1) and reports the ultraviolet radiation intensity, plasma concentration, and environmental temperature and humidity data; the detection unit (3) is installed inside the device to monitor the disinfection environment in real time.

5. The control system for coordinated disinfection by ultraviolet light and low-temperature plasma according to claim 1, characterized in that: The Internet of Things platform (6) obtains data collected by the main controller (1) through the 4G module (5), including ultraviolet radiation intensity, plasma concentration, temperature and humidity, and displays them visually; the Internet of Things platform (6) can remotely send instructions to the main controller (1) to control the disinfection unit (2).

6. A control system for coordinated disinfection by ultraviolet light and low-temperature plasma according to any one of claims 1 to 5, characterized in that: After the boot animation ends, the main controller (1) will automatically enter the disinfection mode selection interface, and the user can choose to use the built-in disinfection solution or a customized disinfection solution.

7. The control system for coordinated disinfection by ultraviolet light and low-temperature plasma according to claim 1, characterized in that: The main controller (1) obtains the ultraviolet radiation intensity value and the plasma concentration value in real time, compares them with the preset values, and adjusts the output of the ultraviolet sterilization lamp and the low-temperature plasma generating device through a fuzzy control algorithm so that the sterilization intensity reaches the preset value; And optimize the parameters based on the system's disinfection results and save them in the disinfection plan currently in use.

8. The control system for coordinated disinfection by ultraviolet light and low-temperature plasma according to claim 1, characterized in that: The main controller (1) uses a polling method to perform data communication with the detection unit (3), and the query instruction includes a preset address of the corresponding unit. The corresponding unit will return data to the main controller (1) only after the address is matched; the main controller (1) and the Internet of Things platform (6) use a wireless communication method, and the 4G module (5) converts the detected data into a JSON format data packet and reports it to the Internet of Things platform (6) using the MQTT protocol.

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