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前言传统的振动传感器设计都包括一个单质量弹簧系统,这里形变或由形变导致的弹簧和应力被转换成模拟信号。这种信号转换可以由压敏电阻、压电材料或电容变化来获得。该系统可以被使用的带宽受到其第一个谐振频率的限制,因为在该频率及其邻近处,灵敏度发生很大变化,导致传感器出现很强的非线性。由于带宽与灵敏度成反比关系,当要求较宽的带宽时,就不得不接受降低了的灵敏度。当打算使传感器在高频范围内工作时,这一问题就变得十分突出了。
Preface Conventional vibration sensor designs include a single-mass spring system where springs and stresses caused by deformation or deformation are converted into analog signals. This signal conversion can be varistor, piezoelectric material or capacitance change to get. The bandwidth that the system can be used with is limited by its first resonant frequency because there is a large change in sensitivity at and near this frequency, resulting in a strong nonlinearity of the sensor. Because bandwidth is inversely proportional to sensitivity, lower sensitivity is required when a wider bandwidth is required. This problem becomes prominent when it is intended to operate the sensor in the high frequency range.