做一样产品是不容易的，特别是需要计量的产品。产品的稳定性，如零点漂移，放大器的温度系数，以及温度的标定方法和水准都会影响结果。电路中必须要有一个基准电压和供应4148电流的恒稳电流源，有2--4个高性能的运算放大器，加上合理的设计，这就是最基本的条件。就是用电磁表头显示，误差也不会超过1度。建议使用AD590检测温度，线路更加简单，精度极高。
说句实话，18B20精度只有±0.5℃，根本不能用来做体温计。
而AD590非线性误差是±0.3℃，LM35DZ误差是±0.4~0.8℃。也不能用体温计。你想啊，人体差那么零点几度就是高烧了。
因而如果你对精度无要求的话首选18B20，因为可以用单片机直接读出温度，不用外加电路。而如果你对精度要求高的话，推荐用PT100, 精度最高可以达到0.1℃。
DS18B20 是一个非常优秀的温度传感器,,一条数据线上可挂接多个DS18B20
而且也比较常用。
我不是用有道，也不是用Google翻译的，而是用金山词霸。呵呵。。。不用谢
Infrared temperature measurement technology in the production process, product quality control and monitoring equipment, on-line fault diagnosis and safety protection and energy saving has played an important role. It has broken the traditional temperature measurement mode, and has no influence to the temperature of the measured object is the temperature field, high resolution, fast response, high accuracy, wide measuring range, is not affected by the temperature upper limit, good stability and can measure the environment temperature and target temperature measurement, the longest distance is 30 meters.
Infrared thermometer is the blackbody radiation law as the theoretical basis, is the product of development of optics theory and microelectronics. Compared with the way of traditional temperature measurement, has the advantages of short response time, non-contact, no interference by temperature field, long service life, convenient operation and a series of advantages. Infrared temperature measurement system of the design is a kind of convenient temperature measurement tool, the function is stable, fast running speed, can be used as a simple non-contact temperature measuring meter. The system can real-time detection, display the temperature information of the current environment. This system is mainly used MLX90614 infrared temperature sensor and STC89C52 SCM
At present, microcontroller communicates with MLX90614 through IIC, the temperature for reading data processing, after driving LCD5110 module temperature measurement
单片机红外测温的介绍到此就结束了，感谢您耐心阅读，谢谢。
本文标签：单片机红外测温
