Objective To develop a multi-channel temperature monitoring system based on AT89S52 singlechip to monitor environmental temperature. Methods This system is composed with the master control regulator, temperature gathering electric circuit, temperature display circuit, alarm control circuit and keyboard entry control circuit. AT89S52 singlechip is used as the control and data processor, intelligent temperature sensor DS18B20 is used as temperature detection, LED digital display tube is used as temperature demonstration output unit. Results Through detection, the measuring range is large (-50～+110℃), and the measuring accuracy is high (error is within 1℃). Conclusion The hardware electric circuit is simple, the cost is low, reading could directly display, and the system is easy to operate.%目的 研究一种基于AT89S52单片机的多路温度监测系统,用于监测环境温度.方法多路温度监测系统由主控制器、温度采集电路、温度显示电路、报警控制电路及键盘输入控制电路组成.系统利用单片机AT89S52做控制及数据处理器、智能温度传感器DS18B20做温度检测器、LED数码显示管做温度显示输出设备.结果系统经过测试,测温范围大(-50~+110℃),测量精度高(误差在1℃以内).结论硬件电路比较简单,成本较低,读数显示直观,使用方便.
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