Mechanical pulse vibration exciter

Abstract

The invention discloses a mechanical pulse vibration exciter which comprises a bottom plate arranged horizontally. A ball screw is vertically arranged above the bottom plate, a servo motor is arranged below the bottom plate, the output shaft of the servo motor penetrates through the bottom plate to be connected with one end of the ball screw, and a primary impact body is arranged on the ball screw. Two slide impact rod supports are vertically arranged above the bottom plate, and a secondary impact body is arranged between the two slide impact rod supports, arranged above the primary impact body correspondingly, and connected with the slide impact rod supports through guide wheel mechanisms. Roller baffle mechanisms are symmetrically arranged below the bottom plate. Therefore, the mechanical pulse vibration exciter solves the problem that the existing vibration exciter has long data collection time, cannot collect frequencies with comprehensive structures, exciting force excited by an artificial force hammer is not uniform, and accuracy of detected signals is poor.

Description

technical field [0001] The invention belongs to the technical field of vibration and testing, and relates to a mechanical pulse exciter. Background technique [0002] At present, there are two excitation methods commonly used in structural vibration modal analysis: one is to use a hammer for manual excitation; the other is to use a vibrator for sine frequency sweep excitation. However, these two methods have their limitations: when using a hammer to strike, due to the different experience of the operators, it is difficult to grasp the uniformity of the force of the strike, which will lead to differences in the response amplitude of the structure and affect the measured signal. Measurement accuracy; when the vibrator is used for sine frequency sweep excitation, since the vibrator obtains the natural frequency of the structure through the frequency sweep of the sine signal, if the structure is more complex, its natural frequency will be many, and the workload of the sine frequ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a mechanical pulse exciter to solve the problem that the existing exciter takes a long time to collect data, cannot collect a frequency with a relatively comprehensive structure, and the excitation force of the artificial hammer excitation is not uniform. The problem of poor measurement signal accuracy

Images