多路温度检测系统的设计与研究

多路温度检测系统的设计与研究

陈媛媛;王晶晶

【期刊名称】《电子测试》 【年(卷),期】2012(000)008

【摘要】现如今很多场合需要对其温度进行实时检测,如粮库、锅炉等,本文主要研究多路温度检测系统的建立及应用。以STC89C52为核心控制芯片,用数字温度传感器DS18B20来测试温度,用移位寄存器74HC595驱动数码管,LM7805稳压芯片为系统提供稳定电压,最后由MAX232电平转换芯片通过串口向单片机下载程序,最终实现多路温度的检测,具有快速、准确、可靠、经济、简单等特点。实验结果表明,所测温度范围为-55℃～125℃,在-10℃～＋85℃范围内精度为±0.5℃,适合普通场合的多路温度检测,该设计系统有很大的发展潜力,具有较大现实应用意义。%Now there are many occasions we need to test its temperature in real time,such as,grain storage,boilers,etc.This design is mainly studied the establishment and application of multi-channel temperature measurement system.Besides,has chose STC89C52 as the core control chip,and choose DS18B20 chips as sensors,uses Shift register called 74HC595 to drive LED,and uses the chip called LM7805 to make the voltage of system more stable.Finally,uses the MAX232 chip to convert

the

level,and

to

download

the

program

to

the

microcontroller,The system is so rapid,accurate,reliable,economic,simple that finally realized the multi-channel temperature measurement.The results show that by laboratory test,The temperature ranges from-55 ℃