Vibration verification device based on linear motor and vibration detecting method thereof

Abstract

The invention discloses a vibration verification device based on a linear motor and a vibration verification method thereof, which are used for verifying measurement accuracy of a low-frequency vibration monitoring instrument or a sensor. The vibration verification device based on the linear motor comprises a user interaction module, a controller, a driver, the linear motor, a support platform, two long stroke fixed rails, two moving guide rails, a test load bearing platform and a grating scale coder. The vibration verification device based on the linear motor can perform vibration verification on a tested vibration monitoring instrument or the sensor by means of joint matching of the linear motor, a laser head and a grating scale. Besides, the vibration verification device based on the linear motor not only can perform verification in a low vibration frequency range, but also can meet the test requirements of vibration tests for high accuracy and long stroke.

Description

technical field [0001] The invention relates to the technical field of vibration verification, in particular to a linear motor-based vibration verification device and a vibration verification method thereof. Background technique [0002] Existing mechanical vibration verification devices are mainly electromagnetic vibration tables and mechanical vibration tables. The electromagnetic vibrating table is the current mainstream vibration verification device. It uses electromagnetic force to push the sliding table to vibrate, and generates a position feedback signal through the grating encoder or laser interference, so as to achieve the purpose of precise control. The electromagnetic vibrating table The advantage is that the frequency can be made very high, and at the same time, the position accuracy can be better guaranteed. The main disadvantage is that the stroke is very short, the frequency cannot be too low, and the heat generation is large. Large-scale electromagnetic vibra...

AI Technical Summary

Problems solved by technology

The electromagnetic vibrating table is the current mainstream vibration verification device. It uses electromagnetic force to push the sliding table to vibrate, and generates a position feedback signal through the grating encoder or laser interference, so as to achieve the purpose of precise control. The electromagnetic vibrating table The advantage is that the frequency can be made very high, and at the same time, the position accuracy can be better guaranteed. The main disadvantage is that the stroke is very short, the frequency cannot be too low, and the heat generation is large. Large-scale electromagnetic vibrating tables often need water cooling to dissipate heat, which makes it Not suitable for low-frequency, high-acceleration vibration verification

The mechanical vibration table uses a precise driver to drive the motor or hydraulic device to push the sliding table to generate vibration. The feedback device is similar to the electromagnetic vibration table. Its advantages are that the frequency can be very low, the load weight can be large, and the stroke is long. The disadvantages The positioning accuracy and vibration power spectral density are not high, and the mechanical noise is large, so it is not suitable for vibration verification

[0003] However, although the above-mentioned methods have their own advantages, they cannot meet the requirements of low frequency, high test precision and long test stroke at the same time or well. In view of this technical defect, it is necessary to design a method that can effectively meet the above items. Vibration verification device for technical requirements

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