Patent ID: 9097603
Filing Date: 2015-08-04
Classification: G01M,H02P

Abstract:
1. A vibration exciter system with a feedback control unit based on an optical linear encoder comprises a vibration exciter, a signal generator and a power amplifier; characterized in that: the vibration exciter system further comprises the optical linear encoder converting the displacement of a moving component of the exciter into two pulse signals with a phase difference of 90° , a wave filtering, shaping and level translator unit converting the two pulse signals into a standard pulse signal with standard shape and level, a subdivider and orientation recognizer unit refining the standard pulse signal and recognizing moving orientation of a system being measured, an analog converter unit converting the refined standard pulse signal into analogue signal whose voltage is in proportion to the current displacement of the moving component; the standard pulse signal outputted by the signal generator and the converted analogue signal are inputted into a subtracter, where the standard pulse is the minuend and the analogue signal is the subtrahend; the output of subtracter is inputted into the power amplifier and the output of the power amplifier is inputted into the vibration exciter as a driving signal.