[scheme development] scheme of infrared thermometer

　　 Infrared thermometer is an electronic product for infrared temperature measurement , It was first used for industrial temperature measurement , But with the development of the times , Gradually developed for the medical industry . The core function of infrared thermometer is to measure the temperature of human body in real time , And it can measure temperature directly without touching human body , This function is particularly important during an outbreak , Can reduce the spread of the disease . The infrared thermometer is characterized by its high precision , Fast temperature measurement , It's easy to operate , Easy to carry , Its advantage lies in that compared with the traditional contact thermometer , Infrared temperature measurement can be used , Temperature measurement is faster , It is more suitable for the epidemic prevention process and greatly meets the requirements of improving the work efficiency of epidemic prevention personnel . At present, an infrared thermometer based on high-precision single-chip microcomputer is developed , The master controller uses ZHW3548, The following are the specific instructions ：
　　
　　 One 、 Introduction to the scheme and function of infrared thermometer
　　
　　 At present, the main control of this infrared thermometer is ZHW3548, Package form ：LQFP48, Through a week of development time 、 Project approval 、 software development 、 Hardware sketchpad 、 Board test 、 Finally, debug and send samples to complete the development of the scheme , Next, let's take a look at the function introduction of the infrared thermometer scheme ：
　　
　　（1） use LCD Show , With three color backlight , You can read in the dark and strong light without any hindrance , And when the temperature alarm is triggered, it will display red ;
　　
　　（2） You can freely switch between Fahrenheit and Celsius units ;
　　
　　（3） One click power on 、 One click temperature measurement , Temperature measurement is fast and accurate , High precision （±0.2℃）;
　　
　　（4） Multi button operation , On off key 、 Temperature measuring key 、 Unit key 、 And the mode conversion can be entered through the compound key operation , Such as memory patterns 、 Material temperature mode 、 High temperature warning temperature setting mode, etc ;
　　
　　（5） The device can be used in extreme environments （-10~50℃） Lower temperature measurement is accurate ;
　　
　　（6） The product is composed of a thermopile type infrared sensor and a microprocessor memory. It is controlled by other components , LCD and backlight , The outer shell is composed of a battery .
　　
　　 Finally, I need to make a special note , The currently developed scheme , Thermometer PCBA The cost is already very low . Relative to the high price at the beginning of the epidemic , Now it has been selling at a low price , Over the years , Through continuous improvement of debugging program software and hardware , The required components are gradually reduced while ensuring the quality , To meet the needs of manufacturers , Create maximum value for the public .