Virtual oscillating table detection signal processing method and equipment thereof

Abstract

The present invention relates to the field of vibrating table detection equipment, the purpose is to overcome the defects in the prior art, design a signal processing method so that the virtual instrument can be applied to the field of measurement, and correspondingly design a kind of equipment suitable for measurement on this basis, More specifically, it is a method and equipment for processing detection signals of a virtual vibrating table. The method comprises the following steps: ①acquiring the acceleration of the vibrating table through a sensor and converting it into an electrical signal; ②conditioning the signal with a signal conditioning device; ③collecting the conditioned signal and sending it to the computer through a data acquisition card; ④transforming the signal through the computer The signal is preprocessed; ⑤ Discrete Fourier transform and digital signal frequency domain filtering are performed on the preprocessed signal; ⑥ Finally, the velocity component is output through one integral, and the displacement component is output through two integrals. Its structure includes acceleration sensor, signal conditioning equipment, data acquisition card and computer.

Description

technical field [0001] The invention relates to the field of vibrating table detection equipment, in particular to a virtual vibrating table detection signal processing method and equipment thereof. technical background [0002] In the past parameter measurement, due to the large number of measured parameters and the wide distribution of the measurement site, a variety of separate measuring instruments such as charge amplifiers, voltmeters, frequency meters, distortion measuring instruments, etc. were required, which brought great pressure to the measurement. the inconvenience. Later, digital frequency meters and dynamic signal analyzers were adopted, but these instruments mainly relied on imports, the processing technology was complicated, and the requirements for manufacturing level were high, and the cost of purchasing these instruments was high, and the channels of the instruments were few, so the use was limited. . At present, the most widely used vibration test syste...

AI Technical Summary

Problems solved by technology

For the hardware module, the A / D conversion link and signal conditioning link transmitted from the sensor to the computer have a greater impact on the accuracy of the system; while the uncertain components brought by the data algorithm used in the virtual instrument software programming and any occurrence of Small flaws may affect the calibration results, so it is difficult to evaluate and measure the influence of each error source on the measured value, so it is no longer possible to evaluate the uncertainty according to the traditional method

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