本文介绍由AD590 集成温度传感器和80C51 单片机组合应用开发的实用高精度智能 恒温加热器电路。重点阐述系统构造、工作原理。同时对AD590 特性、硬件设计和软件设计也做了介绍。该系统体积小、成本低、精度较好、容易实现,有很高的实用价值。 关键词:恒温加热器;AD590;80C51 单片机 Abstract: This article introduces the circuit of stable temperature thermostatically heater of practical use, high sophistication and intelligence, which is developed with application of an AD590 temperature sensor and an 80C51 microprocessor. It focuses on explaining structure of the system and the working theory of the heater. It also describes the characteristics of AD590, the hardware design and the software design. The heater has characteristics of little volume, low cost, high accuracy, easy actualization, hence of high practical value. Keywords: thermostatically heater, AD590 temperature sensor and the 80C51 microprocessor