A low-frequency vibration displacement detection system and method

Abstract

The invention discloses a low-frequency vibration displacement detection system and method. The system includes a vibration detecting module, a signal preprocessing module, a sampling module, and a processing module. The vibration detecting module is fixed to a detected object, and is used for collecting an acceleration signal of the detected object and processing the acceleration signal to get an acceleration voltage signal. The input end of the signal preprocessing module is connected to the output end of the vibration detecting module. The signal preprocessing module is used for conditioning and amplifying the acceleration voltage signal and outputting the digital quantity of acceleration via the sampling module. The input end of the processing module is connected to the sampling module. The processing module is used for carrying out operation processing on the digital quantity of acceleration to get the final digital quantity of speed and the final digital quantity of displacement of the detected object. The system and the method can realize the detection of ultra-low-frequency vibration and small displacement, and have high detection accuracy.

Description

technical field [0001] The invention relates to the field of displacement detection, in particular to a low-frequency vibration displacement detection system and method. Background technique [0002] In vibration detection, the main research focus is on the mechanical vibration of the tested equipment. Mechanical vibration is a special form of motion. During this motion, the mechanical system will reciprocate around the equilibrium position. With the rapid development of modern industrial technology, there is an urgent need for testing technology for structural displacement and speed signals in many fields. need. [0003] Although there are many kinds of equipment and methods for testing displacement and velocity in theory, these methods still have many limitations and impracticalities in the actual testing process. Relatively speaking, acceleration testing for large equipment or large steel structures , no matter on the theoretical level, measurement accuracy, or in engin...

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Problems solved by technology

[0003] Although there are many kinds of equipment and methods for testing displacement and velocity in theory, these methods still have many limitations and impracticalities in the actual testing process. Relatively speaking, acceleration testing for large equipment or large steel structures , no matter in theory, measurement accuracy, or in engineering practice, it is much easier than displacement detection and speed detection

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