Non-contact infrared temperature measurement system for human body based on single chip microcomputer

 

Design brief ：

This design is a non-contact infrared temperature measurement system for human body based on single chip microcomputer , It mainly realizes the following functions ：

• It can be done by LCD1602 Displays the temperature and whether someone ;
• The temperature threshold can be adjusted by pressing the key ;
• The infrared tube can be used to monitor whether there are people ;
• It can be broadcast by voice TTS Broadcast temperature and temperature status .

label ：51 Single chip microcomputer 、LCD1602、 Non contact human body temperature measurement 、 Voice Announcements

design sketch ：

 

General information ：

 

Schematic diagram

 

Software design process ：

 

 

 

System diagram ：

 

This design is based on STC89C52 Single chip microcomputer is the core controller , Together with other modules, it forms the whole system of non-contact human infrared temperature measurement , It contains the central control part 、 Input part and output part . The central control part adopts STC89C52 Single chip microcomputer , Its main function is to obtain the input data , After internal treatment , Control output section .

The input consists of four parts , The first part is MLX90614 Infrared temperature measurement module , The module can detect the current human body temperature ; The second part is the infrared tube module , Through this module, it can detect whether there are people ; The third part is the independent key , Switch the interface and set the upper and lower limits of human body temperature through three independent keys ; The fourth part is the power supply circuit , Supply power to the whole system . The output consists of three parts , The first part is LCD1602 Display module , The module can display the current human body temperature 、 Is there anyone 、 Set the maximum value of human body temperature, etc ; The second part is the voice module , When someone is detected and timed 3S after , The module voice broadcast temperature and whether the temperature is normal ; The third part is the buzzer , If the current human body temperature is greater than the set maximum value or less than the set minimum value , Then the buzzer will beep every 100ms Call the police once , If the current body temperature is less than or equal to the set maximum value , Then the buzzer stops alarming .