主要介绍了基于C8051单片机的发动机火警传感器校验仪的研制,讨论了该校验仪硬件电路的设计以及对温度非线性进行曲线拟合的方法。实验结果表明该校验仪能够全自动地检测出火警传感器的动作情况,并且具有较高的温度检测精度和稳定性。 This paper mainly introduces the development of calibrator for engine fire sensor based on C8051 singlechip, discusses the design of hardware circuit of the calibrator and the method of curve fitting to temperature nonlinearity. The experimental results show that the calibrator can automatically detect the operation of the fire sensor and have high accuracy and stability of temperature detection.