Virtual oscillating table detection signal processing method and equipment thereof

Abstract

The invention relates to a vibration table detection instrument field. In order to overcome the defects of the prior art, a signal processing approach is designed to allow a virtue instrument to be applied to the measurement field and an instrument suitable for measurement is designed accordingly on the basis of the signal processing approach. More particularly, the invention relates to a virtual vibration table detecting signal processing method and the instrument. The method comprises the processes: (1) the acceleration value of the vibration table is collected and converted into electric signals; (2) the signal is conditioned by a signal conditioning instrument; (3) the conditioned signal is collected by a data collecting card and transmitted to a computer; (4) the signal is preprocessed by the computer; (5) the preprocessed signal is discrete Fourier transformed and digital signal frequency domain filtered; (6) in the end, a speed component is output after the signal is integrated for one time; a displacement component is output after the signal is integrated for two times. The detection instrument comprises an acceleration sensor, a signal conditioning instrument, a data collecting card and a 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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