Scheme design of intelligent ultraviolet sterilizer

Microorganisms are ubiquitous in human living environment. Beneficial microorganisms can help people live a healthy life, but harmful microorganisms will lead to diseases of people and animals, cause serious economic losses, and even endanger life. When the human body's resistance is low, a small amount of harmful microorganisms may also cause human diseases. Therefore, disinfection has become the most direct and convenient means in the struggle between human beings and pathogenic microorganisms. With the continuous development of science and technology, human knowledge and material needs are increasing. Traditional chlorine disinfection has long been replaced by ultraviolet disinfection with pure physical effect, no secondary pollution, high sterilization efficiency, safe and reliable operation, simple maintenance, low cost and small floor area. However, at present, the ultraviolet sterilizers on the market are mixed, so it is impossible to count the disinfection dose and monitor the disinfection effect in real time. When the equipment works, it will produce a large number of ultraviolet rays harmful to human body, which has certain potential safety hazards. The intelligent UV disinfection monitor guides the development of a real-time monitoring, safe, effective and universal economy product by developing real-time monitoring technology for disinfection effect, dual infrared detection and protection technology, remote control technology, ozone free sterilization technology, anti-aging technology, Internet technology and delay function. It plays a guiding role in improving basic ultraviolet disinfection equipment and opening up more application markets.

1、 Scheme background of intelligent ultraviolet sterilizer

1.1 theoretical basis of ultraviolet sterilizer

Ultraviolet disinfection is a physical disinfection method. The main principle is to use the ultraviolet with the wavelength of 240 ~ 280 nm to destroy the molecular structure of DNA (deoxyribonucleic acid) or RNA (ribonucleic acid) in microbial cells, so that they can not split and replicate, so as to achieve the purpose of disinfection. In the 1970s, ultraviolet sterilization technology began to be applied to sewage, industrial disinfection and other fields. At present, UV disinfection technology in western countries is widely used, mainly in the field of medical and health care, water treatment and air conditioning and ventilation systems. Compared with the research and application of ultraviolet disinfection technology abroad, China started late. However, with the enhancement of people's awareness of health and environmental protection, ultraviolet disinfection technology is gradually recognized and accepted by the public. After 50 years of development, ultraviolet disinfection technology has developed into a more mature and efficient environmental protection disinfection technology.

1.2 design principle of intelligent ultraviolet disinfection monitor

In order to make up for the blank of traditional ultraviolet disinfection equipment in disinfection effect monitoring and solve its main potential safety hazards, seven advantageous technologies are developed to achieve the expected goal of intelligent ultraviolet disinfection monitor. Its advantages include: real-time monitoring of disinfection effect, double infrared detection and protection technology, remote control technology, ozone free sterilization technology, anti-aging technology, Internet technology and delay function. The real-time monitoring system of intelligent ultraviolet disinfection monitor is composed of network communication module, data acquisition and analysis module and output module based on single chip microcomputer. The data acquisition module calculates the total dose of ultraviolet light irradiation in a working time through the product of the ultraviolet light irradiation dose in one working time of the equipment, collects the data of each working time of each equipment in this way, and inputs and stores it in the rear data system. The data analysis module is to preset a default value in the background, that is, the total dose of ultraviolet light, based on the data collected from the early equipment commissioning and a large number of repeated tests, judge whether the disinfection effect is achieved, record the success or failure of one-time disinfection of the equipment, and display the analysis results on the equipment display screen. Through this module, the data acquisition, data storage, remote monitoring and disinfection effect feedback of intelligent ultraviolet disinfection monitor are realized.

2、 Development of intelligent ultraviolet disinfection monitor

The product is an ultraviolet sterilizer based on single chip microcomputer network communication technology and dual infrared sensing technology.

In order to avoid people entering the disinfection place by mistake, which will affect the disinfection effect and their own health. The hardware of intelligent ultraviolet disinfection monitor draws lessons from the dual infrared sensing technology. The dual infrared sensor is composed of microcontroller, two infrared detectors, RF card reader and audible and visual alarm system. The microcontroller collects the data of each subsystem in real time, and effectively controls each subsystem according to the processing results after data fusion processing.

Two infrared detectors are respectively connected with the microcontroller through two interrupt ports. Each infrared detector is composed of an infrared transmitter and an infrared receiver. When no one enters the channel, the infrared transmitter and infrared receiver are always connected; When someone enters the channel, the infrared transmitter and infrared receiver are disconnected. The image monitoring system monitors the access personnel in real time. At the same time, dual infrared is more sensitive to ultraviolet leak detection. Once a problem occurs, the audible and visual alarm system will be started. The RF card reader receives the matched magnetic card information and starts the ultraviolet sterilization process. The monitoring terminal receives and analyzes data to realize data sharing.

The intelligent ultraviolet disinfection monitor receives disinfection data in real time through cloud data. The remote monitoring system mainly includes two ports: PC server and mobile client, as follows:

(1) PC server program needs to provide real-time data receiving and monitoring interface and other network connection ports. Generally, it includes data receiving, Internet access and other functions. (2) The mobile client provides access server network interface services and displays monitoring information. It mainly includes setting connection information, connecting server program and displaying monitoring information. The system can realize the real-time monitoring of data in PC, and the mobile client can directly access the server and monitor the data through the network. At the same time, it has the function of remote control.

epilogue

The intelligent ultraviolet disinfection monitor is composed of data acquisition module, network communication module and data analysis module. Through a large number of repeated tests, the real-time monitoring effect of the equipment is good, can effectively achieve the expected effect and meet the market demand, and has a very broad development prospect.