Single Bus Multi-point Temperature Detection Technology Based on DS1820

The multi-point temperature detection technology based on a single bus thermalmetric element DS1820 is described.In order to realize the function and exert its effect,a temperature detection system with a single bus is constructed by integrating the DS1820 device onto the 89C51 single chip computer which is controlled by a software programme.The experimental results show that the testing and control system has many advantages such as simpleness,high accuracy,easy access and less connection wires.The innovation is to monitor several or even dozens of temperature points simultaneously by one communication interface to save the bandwidth and simplify hardware connections.