2.什么是阻抗头?为什么要用它?

传感器相关问题

An impedance head, like PCB Piezotronics model 288D01, is a transducer that measures both force and resulting response in one device. Today, this is typically an accelerometer and force transducer but in the past it was a velocity transducer and force transducer (which is where the name impedance head comes from and has lingered on even today though velocity is rarely measured). This is a critical measurement in experimental modal analysis and it is recommended that impedance heads be used in most cases. A combination of a separate force transducer and accelerometer, mounted next to each other, is often used instead, but the convenience of measuring the driving point with a single transducer and validating reciprocity between input locations is best obtained with an impedance head.

阻抗头,例如PCB 288D01型,是一种传感器,在一个装置上不但测量力而且测量得到的响应。今天,这通常是一个加速度计和力传感器,但在过去它是一个速度传感器和力传感器(它是阻抗头名字的由来,并且一直延续到今天,即使很少测量速度)。在试验模态分析中,这是一个关键的测量结果,在大多数情况下推荐使用阻抗头。有时作为替代,使用单个的力传感器和加速度计合起来,相互安装在一起,但是用单个传感器测量驱动点的便利性以及验证输入位置之间的互易性,最好用一个阻抗头获得。