KR20130047013A - Vibration monitoring system and method for rotating machinery system based on exclusive or circuit - Google Patents

Vibration monitoring system and method for rotating machinery system based on exclusive or circuit Download PDF

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Publication number
KR20130047013A
KR20130047013A KR1020110111755A KR20110111755A KR20130047013A KR 20130047013 A KR20130047013 A KR 20130047013A KR 1020110111755 A KR1020110111755 A KR 1020110111755A KR 20110111755 A KR20110111755 A KR 20110111755A KR 20130047013 A KR20130047013 A KR 20130047013A
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KR
South Korea
Prior art keywords
signal
vibration
exclusive
degrees
unit
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KR1020110111755A
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Korean (ko)
Inventor
이철원
정태석
최진우
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에스티엑스조선해양 주식회사
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Priority to KR1020110111755A priority Critical patent/KR20130047013A/en
Publication of KR20130047013A publication Critical patent/KR20130047013A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D1/00—Measuring arrangements giving results other than momentary value of variable, of general application
    • G01D1/18—Measuring arrangements giving results other than momentary value of variable, of general application with arrangements for signalling that a predetermined value of an unspecified parameter has been exceeded
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: A system and a method for monitoring the vibration of rotating equipment using an exclusive OR circuit are provided to monitor the vibration of the rotating equipment with a simple structure at a low cost. CONSTITUTION: A system for monitoring the vibration of rotating equipment using an exclusive OR circuit comprises a vibration sensor(10), a specific frequency recognition unit(20), and an alarm generating unit(30). The vibration sensor measures the vibration of the rotating equipment. The specific frequency recognition unit receives vibration signals from the vibration sensor, thereby outputting the specific frequencies by recognizing the same with the exclusive OR circuit. The alarm generating unit generates an alarm by receiving the outputting signals of the specific frequency recognition unit. [Reference numerals] (10) Vibration sensor; (20) Specific frequency recognition unit; (30) Alarm generating unit

Description

Vibration monitoring system and method for rotating machinery system based on exclusive OR circuit

The present invention provides a system and method for monitoring vibration of vibration equipment using an exclusive OR circuit, and more specifically, to set characteristics and thresholds of a simple exclusive OR circuit capable of recognizing only a frequency of a specific signal. The present invention relates to a low-cost, simple rotating equipment vibration monitoring system and method for generating a warning signal when detecting a vibration higher than a predetermined vibration level from a vibration sensor by using an RC circuit.

In the case of rotating machinery such as pumps and generators installed on ships, problems such as shaft alignment due to installation problems or aging may cause excessive vibration. In order to prevent damage to the equipment, maintenance by detecting the change of vibration condition is necessary immediately.

However, in order to detect such vibration state changes, a system for analyzing a vibration sensor and a vibration signal as shown in FIG. 3, that is, for processing analog signals from the vibration sensor as a separate digital signal The signal processing module had to use a signal processing module which included a signal acquisition module and a frequency analysis module for analyzing the frequency of the signal coming from the vibration sensor. The signal processing module used for the analysis of the signal measured from the vibration sensor was considerably more expensive and complex in construction than the purpose of use.

In the case of constant speed rotating equipment, the frequency of vibration generated due to problems such as misalignment of shaft system or incompatibility of the rotating part always has a constant characteristic. In addition, the vibration tolerance of rotating equipment based on ISO 10816 also has a constant value. Accordingly, the present invention uses the characteristics of a simple exclusive OR circuit capable of recognizing only the frequency of a specific signal and an RC circuit that can set a threshold thereof. It is an object of the present invention to provide a simple and low-cost vibration monitoring system and method for generating a warning signal upon vibration detection.

According to an aspect of the present invention,

Vibration sensor for measuring the vibration of the rotating equipment;

A specific frequency recognition unit receiving a vibration signal from the vibration sensor and recognizing and outputting a specific frequency using an exclusive OR circuit;

An alarm generator which sounds an alarm in response to the output signal of the specific frequency recognition unit;

It provides a rotation equipment vibration monitoring system using an exclusive logical sum circuit comprising a.

Further, according to the present invention,

A signal input unit which receives a reference signal as a signal having a different phase and receives a vibration signal of a vibration sensor as a signal having a different phase;

A comparator for outputting a digital signal by comparing the vibration signal input from the signal input part with reference signals of different phases;

An amplifier for amplifying the signal compared by the comparison unit;

An output unit which determines and outputs a frequency of the vibration signal input from the signal amplified by the amplifier;

It provides a rotation equipment vibration monitoring system using an exclusive logical sum circuit comprising a.

Further, according to the present invention,

A method implemented on a rotating equipment vibration monitoring system using the exclusive OR circuit,

A first step of receiving, by the signal input unit, a reference signal as a signal having a different phase and a vibration signal of a vibration sensor as a signal having a different phase;

A second step of generating, by the comparing unit, a digital signal by comparing the input vibration signal with reference signals having different phases;

A third step of the amplifying unit amplifying the generated digital signal;

A fourth step of the output unit determining and outputting a frequency of a vibration signal input from the amplified digital signal;

It provides a rotation equipment vibration monitoring method using an exclusive logical sum circuit comprising a.

According to the present invention it is possible to monitor the vibration of the rotating equipment with a simple structure and low cost.

1 is a block diagram of a rotation equipment vibration monitoring system using an exclusive OR circuit according to the present invention.
Figure 2 is a detailed block diagram of a specific frequency recognition unit in the rotation equipment vibration monitoring system using an exclusive logical sum circuit according to the present invention.
3 is a block diagram of a system for detecting a change in vibration state, which is used in the related art.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a block diagram of a rotation equipment vibration monitoring system using an exclusive OR circuit according to the present invention.

As shown in Figure 1, the present invention is a vibration sensor for measuring the vibration of the rotating equipment (10); A specific frequency recognition unit 20 which receives a vibration signal from the vibration sensor 10 and recognizes and outputs a specific frequency using an exclusive OR circuit; And an alarm generator 30 which sounds an alarm by receiving the output signal of the specific frequency recognition unit 20.

FIG. 2 is a detailed block diagram illustrating a specific frequency recognizer in FIG. 1.

As shown in FIG. 2, the specific frequency recognizer 20 receives a reference signal as a signal having a different phase, and receives a vibration signal of the vibration sensor 10 as a signal having a different phase. ); A comparator 50 for outputting a digital signal by comparing the vibration signal input from the signal input part 40 with reference signals of different phases; An amplifier 60 for amplifying the signal compared by the comparison unit 50; And an output unit 70 for determining and outputting a frequency of the vibration signal input from the signal amplified by the amplification unit 60.

In this case, the signal input unit 60 receives a reference signal as a signal having 0, 90, 180, and 270 degrees which are different phases.

In addition, the comparison unit 50 compares each of the reference signals having different phases of 0 degrees, 90 degrees, 180 degrees, and 270 degrees with the input vibration signal to perform the exclusive OR, respectively, and perform the exclusive ORs respectively. 51 to 54 are configured.

The amplifying unit 60 performs first and fourth integral ORs in the first to fourth exclusive OR elements 51 to 54 in the comparison unit 50 to integrate and amplify the compared signals, respectively. It is comprised including the parts 61-64.

The output unit 70 extracts a maximum value from the signals amplified by the first to fourth integrators 61 to 64 in the amplifier 60 to determine the frequency of the input vibration signal. 1 to 4 diodes 71 to 74 are configured.

Hereinafter, a method for monitoring vibration of a rotating device using an exclusive OR circuit according to the present invention will be described. The method is implemented on a rotating machine vibration monitoring system using the exclusive OR circuit described above.

The method may further include a first step in which the signal input unit 60 receives a reference signal as a signal having a different phase, and receives a vibration signal of the vibration sensor 10 as a signal having a different phase; A second step of the comparing unit 50 generating the digital signal by comparing the input vibration signal with reference signals having different phases; A third step of amplifying the generated digital signal by the amplifier 60; And a fourth step of the output unit 70 determining and outputting a frequency of the vibration signal inputted from the amplified digital signal.

In the present invention, the first step is configured to connect the vibration signal coming from the vibration sensor 10 to the input terminal, so that the reference frequency signal is input at each 90 degree phase difference. The second step is configured to apply voltage only when the reference signal and the input signal have the same frequency using an exclusive OR circuit. And the third step is configured to be amplified when the signal passing the second step using the RC circuit has a predetermined magnitude or more, that is, more than a predetermined threshold (threshold).

In this case, in the first step, the signal input unit 60 receives the reference signal as a signal having 0 degrees, 90 degrees, 180 degrees, and 270 degrees which are different phases.

In the second step, the comparison unit 50 compares each of the reference signals having different phases of 0 degrees, 90 degrees, 180 degrees, and 270 degrees with the input vibration signal to perform an exclusive logical sum to respectively perform a digital signal. Create

In the third step, the amplification unit 60 performs an exclusive OR for each of the second steps to integrate and amplify the compared signals.

In the fourth step, the output unit 70 determines and outputs the frequency of the vibration signal inputted from the amplified digital signal. In this case, the output unit 70 determines whether a specific frequency is detected in the amplified signal, and if the specific frequency is not detected, repeats the first step.

According to the above, it is possible to monitor the vibration of the rotating equipment with a simple structure and low cost.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

10: Vibration sensor
20: specific frequency recognition unit
30: alarm generating unit
40: signal input unit
50: comparison unit
51 to 54: first to fourth exclusive OR elements
60: amplification unit
61 to 64: first to fourth integral part
70:
71 to 74: first to fourth diodes

Claims (13)

Vibration sensor 10 for measuring the vibration of the rotating equipment;
A specific frequency recognition unit 20 which receives a vibration signal from the vibration sensor 10 and recognizes and outputs a specific frequency using an exclusive OR circuit;
An alarm generating unit 30 which sounds an alarm by receiving the output signal of the specific frequency recognizing unit 20;
Rotation equipment vibration monitoring system using an exclusive logical sum circuit comprising a. A signal input unit 40 receiving a reference signal as a signal having a different phase, and receiving a vibration signal of the vibration sensor 10 as a signal having a different phase;
A comparator 50 for outputting a digital signal by comparing the vibration signal input from the signal input part 40 with reference signals of different phases;
An amplifier 60 for amplifying the signal compared by the comparison unit 50;
An output unit 70 for determining and outputting a frequency of the vibration signal input from the signal amplified by the amplifier 60;
Rotation equipment vibration monitoring system using an exclusive logical sum circuit comprising a. The method of claim 2,
The signal input unit 60 is a rotation equipment vibration monitoring system using an exclusive logical sum circuit, characterized in that for receiving a reference signal as a signal having a different phase of 0 degrees, 90 degrees, 180 degrees, 270 degrees. The method of claim 2,
The comparison unit 50 compares each of the reference signals having different phases of 0 degrees, 90 degrees, 180 degrees, and 270 degrees with the input oscillation signal to perform exclusive ORs, respectively. Rotation equipment vibration monitoring system using an exclusive logical sum circuit comprising a 51 ~ 54). The method of claim 4, wherein
The amplifying unit 60 performs first and fourth exclusive ORs 51 to 54 in the comparing unit 50, respectively, and performs first and fourth integrating units for integrating and amplifying the compared signals, respectively. Rotation equipment vibration monitoring system using an exclusive logical sum circuit, characterized in that it comprises (61 ~ 64). The method of claim 5, wherein
The output unit 70 extracts a maximum value from the signals amplified by the first to fourth integrators 61 to 64 in the amplifier 60 to determine the frequency of the input vibration signal. Rotation equipment vibration monitoring system using an exclusive logical sum circuit, characterized in that it comprises a fourth to fourth diode (71 ~ 74). A method implemented on a rotating equipment vibration monitoring system using the exclusive OR circuit,
A first step in which the signal input unit 60 receives a reference signal as a signal having a different phase, and receives a vibration signal of the vibration sensor 10 as a signal having a different phase;
A second step of the comparing unit 50 generating the digital signal by comparing the input vibration signal with reference signals having different phases;
A third step of amplifying the generated digital signal by the amplifier 60;
A fourth step of the output unit 70 determining and outputting a frequency of the vibration signal input from the amplified digital signal;
Rotation equipment vibration monitoring method using an exclusive logical sum circuit comprising a. The method of claim 7, wherein
In the first step, the signal input unit 60 receives the reference signal as a signal having a phase, 0 degrees, 90 degrees, 180 degrees, 270 degrees of different phases, rotating equipment vibration monitoring method using an exclusive OR circuit . The method of claim 7, wherein
In the second step, the comparison unit 50 compares each of the reference signals having different phases of 0 degrees, 90 degrees, 180 degrees, and 270 degrees with the input vibration signal to perform an exclusive logical sum to generate digital signals. Rotation equipment vibration monitoring method using an exclusive OR circuit. The method of claim 7, wherein
In the third step, the amplification unit (60) performs the exclusive OR in the second step, respectively, integrating and amplifying the compared signal, characterized in that the rotation equipment vibration monitoring method using an exclusive OR circuit. The method of claim 7, wherein
In the fourth step, the output unit 70 monitors the vibration of the rotating equipment using an exclusive logical sum circuit, characterized in that for determining the frequency of the vibration signal input from the amplified digital signal. The method of claim 11,
The output unit (70) is a rotation equipment vibration monitoring method using an exclusive OR circuit, characterized in that for determining whether a specific frequency is detected in the amplified signal. 13. The method of claim 12,
And the output unit (70) re-executes the first step if the specific frequency is not detected.
KR1020110111755A 2011-10-31 2011-10-31 Vibration monitoring system and method for rotating machinery system based on exclusive or circuit KR20130047013A (en)

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KR1020110111755A KR20130047013A (en) 2011-10-31 2011-10-31 Vibration monitoring system and method for rotating machinery system based on exclusive or circuit

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Application Number Priority Date Filing Date Title
KR1020110111755A KR20130047013A (en) 2011-10-31 2011-10-31 Vibration monitoring system and method for rotating machinery system based on exclusive or circuit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105136281A (en) * 2015-10-14 2015-12-09 基康仪器股份有限公司 Vibrating wire transducer frequency measurement device and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105136281A (en) * 2015-10-14 2015-12-09 基康仪器股份有限公司 Vibrating wire transducer frequency measurement device and method
CN105136281B (en) * 2015-10-14 2018-03-02 基康仪器股份有限公司 The frequency measuring equipment and method of vibrating string type sensor

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