仿生毛发流速传感器的控制电路设计

Design of control circuit for bio-inspired hair flow sensor

设计了一种基于谐振式仿生毛发流速传感器的相位、幅度双闭环数字控制电路。介绍了传感器基本工作原理以及相位、幅度双闭环的控制原理,设计了一种基于数字锁相环和数字化幅度稳定闭环系统的传感器控制方案。在SIMULINK软件环境下搭建了控制系统模型,验证了控制方案的可行性。进行了流速试验,结果表明:该电路能够实时跟踪传感器谐振器的谐振频率,驱动幅值稳定,同时该仿生毛发流速传感器实现了最小2.32 mm/s的空气流速敏感。

A digital double closed-loop control circuit of phase and amplitude based on resonant biomimetichair flow sensor is designed.The basic working principle of the sensor and the control principle of the double closed-loop of phase and amplitude are introduced.The proposed sensor control scheme is based on the digital phase-locked loop and the digital amplitude stable closed-loop system.The control system model is built in SIMULINK,the feasibility of the control scheme is verified.Flow velocity experiments are carried out,which shows that the circuit can track the resonant frequency of the sensor resonator in real-time and the driving amplitude is stable.The experimental results confirm that the flow sensor has a detection-limit of 2.32 mm/s.