Specific realization function
The system consists of STC89C52 single-chip microcomputer + ZE08-CH2O formaldehyde sensor + LCD1602 liquid crystal display + buttons + buzzer + indicator light + power supply.
Specific functions:
1. The formaldehyde data measured by the formaldehyde sensor is processed by the single-chip microcomputer and displayed in real time by LCD1602;
2. The formaldehyde alarm threshold can be set by pressing the button;
3. When the measured formaldehyde concentration exceeds the alarm threshold, an audible and visual alarm will start.
design background
Nowadays, the degree of automation and informatization is getting higher and higher. With the development of society, the progress of technology and the gradual improvement of people’s living standards, various automatic control systems that are convenient for life have begun to enter people’s lives, and they also signify automatic control. The field has become a member of the digital age. The automatic door system based on the single-chip microcomputer is one of them. It has strong practicability, complete functions, and advanced technology, which makes people believe that it is the result of scientific and technological progress. It also allows humans to understand that the development of the digital age will change human life and accelerate the development of science and technology. The application field of the one-chip computer is becoming wider and wider, becoming an indispensable part of people's lives.
At present, the application of single-chip microcomputer has penetrated into all areas of our lives, and it is almost difficult to find which field has no trace of single-chip microcomputer.
With the development of society, people's living standards are constantly improving. The development of the real estate industry has led to the rapid development of a series of subsidiary industries. Consumers' lives have changed from "quantity" to "quality", and "safety, health and comfort" has become the core concept of life.
The decoration has penetrated into our lives, and the decoration materials are also varied. The harmful element formaldehyde emitted from decoration materials has brought a great threat to our lives. At the same time, the harm of different concentrations of formaldehyde to the human body is different. At the same time, people of different ages and physiques have different resistance to formaldehyde. Formaldehyde is a highly toxic substance and ranks second on the priority control list of toxic chemicals in my country. Formaldehyde has been identified as a carcinogenic and teratogenic substance by the World Health Organization.
hardware design
In this design, the function of the single-chip microcomputer is to detect the concentration of formaldehyde and display it on the LCD. When the concentration of formaldehyde exceeds the upper limit set by the user, it will prompt an alarm. The system block diagram is as follows.
software design
When there is no interruption, the display, key-press processing, and detection of overrun procedures will be executed again; when there is an interruption, the interrupt service routine will be executed.
Schematic diagram
The system schematic design adopts Altium Designer19, as shown in the figure.
program
This design uses KEIL5 software to realize the program design, as shown in the figure.
Simulation implementation
This design uses protues8.7 software to realize the simulation design, as shown in the figure.
All information
All materials include programs (notes), AD schematics, PCB source files, protues simulation, reference papers, program explanations, simulation explanations, simulation videos, schematic explanations, introductions to the use of materials, etc., the most complete network!
