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Adaptive key-phase signal preprocessing circuit and working method thereof

A technology for preprocessing circuits and key-phase signals. It is used in the measurement of electricity, measurement of electrical variables, and motor generator testing. It can solve the problems of requiring manual operation, high cost, and complex circuit structure, and achieve the effect of reducing manual operation.

Inactive Publication Date: 2019-11-22
NR ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the problems and defects in the prior art such as complex circuit structure, high cost, and the need for manual operation, and to provide a key phase with simple circuit structure, high reliability, and self-adaption Signal preprocessing circuit and its working method

Method used

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  • Adaptive key-phase signal preprocessing circuit and working method thereof
  • Adaptive key-phase signal preprocessing circuit and working method thereof
  • Adaptive key-phase signal preprocessing circuit and working method thereof

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Embodiment Construction

[0033] The technical scheme of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0034] like figure 1 Shown is a specific embodiment one of an adaptive key-phase signal preprocessing circuit of the present invention, including a high-pass filter module, an amplitude attenuation module, a low-pass filter module, a peak-to-valley detection module, a comparison shaping module and a CPLD module; The input of the high-pass filter module is the key phase signal collected by the key phase sensor, and the output end is connected to the first input end of the amplitude attenuation module; the second input end of the amplitude attenuation module is connected to the output end of the CPLD module, and the amplitude attenuation module The ...

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Abstract

The invention provides an adaptive key-phase signal preprocessing circuit, which includes a high-pass filter module, an amplitude attenuation module, a low-pass filter module, a peak-valley detectionmodule, a comparison shaping module, and a CPLD module. The amplitude attenuation module, low-pass filter module, the peak-valley detection module, the comparison shaping module, and the CPLD module form a closed-loop control system. With the amplitude attenuation module, an attenuation coefficient levelcan be set programmatically to attenuate the amplitude of the input signal. The CPLD module performs analysis and processing according to the captured and shaped key-phase signal characteristics and sets an attenuation coefficient level suitable for the amplitude attenuation module. In addition, the invention also provides a corresponding working method. The circuit has advantages of simple structure, low cost, high reliability, human operation prevention and high adaptability.

Description

technical field [0001] The invention relates to the technical field of power system generator measurement, in particular to an adaptive key-phase signal preprocessing circuit and a working method thereof. Background technique [0002] The steam turbine generator set is an important power generation equipment in thermal power plants. With the development of science and technology, the steam turbine generator has been in high-speed operation for a long time, so the online monitoring of its vibration information is particularly important. The key phase measurement of the turbine generator rotor is an important signal for generator vibration on-line monitoring. Through the comprehensive comparison and analysis of the key phase signal and other vibration electrical signals, the vibration phase angle can be obtained, which can be used for equipment failure analysis, diagnosis and positioning. [0003] Due to the inconsistency of the specification parameters of the key-phase sensor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34
CPCG01R31/343
Inventor 瞿亮李响王凯张琦雪
Owner NR ENG CO LTD
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