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Unbalance signal extracting method applicable to online dynamic balancing

A technology of balance signal and extraction method, which is applied in static/dynamic balance test, machine/structural component test, measuring device, etc. It can solve the problems of not meeting the high time-efficiency requirements and the long operation time of the sine parameter search method, and achieve The effect of saving signal extraction time, eliminating adverse effects, and reducing calculation time

Inactive Publication Date: 2013-03-20
HEFEI UNIV OF TECH
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Problems solved by technology

The sine parameter search method in the method disclosed in this patent takes a long time to calculate and cannot meet the high time-efficiency requirements of online dynamic balance for signal extraction

Method used

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  • Unbalance signal extracting method applicable to online dynamic balancing
  • Unbalance signal extracting method applicable to online dynamic balancing
  • Unbalance signal extracting method applicable to online dynamic balancing

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Embodiment Construction

[0028] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0029] Such as figure 1 Shown is a schematic diagram of the composition of the signal processing system of the present invention. The method for extracting unbalanced signals suitable for on-line dynamic balance of rotating machinery includes a sensor module, a digital sinusoidal signal module and a digital signal processing microcontroller.

[0030] The sensor module includes key phase sensor, vibration signal sensor, corresponding signal conditioning device and A / D converter. The key phase sensor generates the key phase pulse as the frequency conversion calculation signal and the phase reference of the unbalanced signal. It requires fast response, high precision and less interference, so the photoelectric sensor is selected. The original pulse obtained by the key-phase photoelectric sensor is not conducive to counting because it is difficult...

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Abstract

The invention discloses an unbalance signal amplitude extracting method applicable to online dynamic balancing. The method comprises the following concrete steps: (1), conditioning and sampling vibration signals sent by a vibration sensor, setting time reference points of the vibration signals and standard sine signals through key phase pulses of a key phase sensor, and performing two-stage FIR (Finite Impulse Response) filtering to the vibration signals for signal denoising; (2), according to a spectrogram of the filtered vibration signals, judging whether large-amplitude interference signals are contained, adopting substraction to remove the large-amplitude interference signals if large-amplitude interference signals are contained, and removing the step if no large-amplitude interference signals are contained; and (3), according to cross-correlation computation results of the filtered standard sine signals and the denoised vibration signals, adopting an improved cross-correlation extraction method to compute the amplitude value and phase position of the unbalance signals. The method provided by the invention can rapidly and accurately extract the amplitude value and the phase position of the unbalance signals under a strong nose background, and is applicable to an online dynamic balancing device of a rotary machine.

Description

technical field [0001] The invention relates to a signal extraction method, in particular to an unbalanced signal extraction method for online dynamic balance measurement. Background technique [0002] As a part of the online fault diagnosis device, the online dynamic balancing device has been proposed to be placed in various high-speed rotating machines to improve the rotating accuracy, stability and reliability of the machine. The principle of online dynamic balance is: when the rotating machinery rotates at the working speed, the unbalanced signal is extracted by filtering and denoising the vibration signal collected by the sensor installed on the supporting structure of the rotating machinery, and the size and position of the unbalanced amount are calculated. The online unbalance compensation device balances the rotating machinery. Due to the many excitation sources that cause the vibration of rotating machinery and the electrical interference of the vibration signal ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M1/22
Inventor 韩江洪徐娟张建军张利罗轶超魏振春王跃飞
Owner HEFEI UNIV OF TECH
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