【摘要】 为了对桥梁尤其是大跨度桥梁的低频振动进行检测,提出了一种采用西勒电容三点式振荡器的调频式驱动电路.利用EWB仿真软件对振荡电路的参数进行优化,并在桥梁的低频振动检测中进行了试验研究.仿真研究和试验结果表明,调频式电路具有响应较快、稳定性较好、灵敏度较好、低频振动响应较好等特点,完全可以应用于桥梁的低频振动检测中.更多还原

【Abstract】 To detect the low-frequency vibration of bridges,a new oscillator circuit of inductance sensor is introduced by means of Selier oscillator.With the help of EWB simulation software,the parameters in this circuit are optimized.It is then tested in low-frequency vibration of the bridge.It is shown through the simulation and test that this circuit enjoys such advantages as rapid response,high sensitivity and better response to low-frequency vibration.更多还原