数字驱动由于其控制算法的灵活性可以有效地提高科氏质量流量计的工作性能。针对数字驱动的启振问题，本文基于模型分析和实验仿真，提出了正负阶跃交替激励启振方法。该方法通过跟踪检测传感器自激输出信号相位进行正负阶跃交替激励，使流量管的振动幅值持续、可靠地快速增大，进而结合非线性幅值控制算法和频率估计，可使流量管启振时间大幅度地缩短，克服了传统启振方法的局限性。-Digital drive control algorithm because of its flexibility can improve the Coriolis mass flowmeter performance. Kai Chun for digital drive, this paper model-based analysis and experimental simulation, some positive and negative incentives Kai vibration method of alternating step. The method by tracking detection sensor output signal phase for self-excited alternating positive and negative step excitation, so that flow tube vibration amplitude sustained and reliable rapid increase can be combined with nonlinear amplitude control algorithm and frequency estimation, allows flow Kai Chun tube significantly reduced the time to overcome the limitations of traditional methods of the Kai oscillator.