CN113624648A - Method and device for synchronously filtering electromagnetic eddy current detection signal by using vibration signal - Google Patents
Method and device for synchronously filtering electromagnetic eddy current detection signal by using vibration signal Download PDFInfo
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- 239000000284 extract Substances 0.000 claims description 5
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- 239000002184 metal Substances 0.000 abstract description 15
- 239000003921 oil Substances 0.000 abstract description 10
- 239000002245 particle Substances 0.000 abstract description 9
- 230000001788 irregular Effects 0.000 abstract description 5
- 230000009191 jumping Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 239000010705 motor oil Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
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- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- G01N27/74—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables of fluids
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N27/9006—Details, e.g. in the structure or functioning of sensors
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
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Abstract
The invention relates to a method and a device for synchronously filtering electromagnetic eddy current detection signals by using vibration signals, which are used for monitoring airborne oil metal abrasive particles or performing electromagnetic eddy current detection on other irregular jumping metal pipe rod wires and the like in an online vibration working state, and synchronously filtering the detection signals, and comprise a detection data processing instrument (3), a detection probe shell (1) and an electromagnetic eddy current detection sensor (2) arranged in the shell (1), and are characterized in that the electromagnetic eddy current detection sensor (2) further comprises a detection coil (21) and an acceleration coil (22) for extracting vibration acceleration signals, wherein the acceleration coil (22) and the electromagnetic eddy current detection coil (21) are overlapped and fixed in the longitudinal direction of a detection surface at intervals through an elastic piece (23). Especially, the electromagnetic detection signal processing of airborne engine oil monitoring obtains more satisfactory effect.
Description
Technical Field
The invention relates to the technical field of nondestructive testing, in particular to an electromagnetic eddy current testing technology for monitoring airborne oil metal abrasive particles or other irregularly-jumped metal pipes, rods, wires and the like in an online vibration working state, and particularly relates to a method and a device for synchronously filtering electromagnetic eddy current testing signals by using vibration signals.
Background
During online eddy current detection, due to irregular jumping of some detection objects, such as online nondestructive detection of pipes, metal rods, metal wires and the like on an automatic production line, in-service oil metal abrasive particle detection of electromechanical engine systems of transportation automobiles, aerospace and the like, vibration of the detection objects has great influence on the quality of detection signals. Particularly, for on-line monitoring and detection of airborne oil metal abrasive particles, an engine is generally in different working states, and some factors such as lifting distance brought to a detection sensor by mechanical vibration change, so that the influence on electromagnetic eddy current detection signals is caused, the signal-to-noise ratio of electromagnetic detection is greatly reduced, the resolution of a detection image is relatively reduced, and even effective signals of the metal abrasive particles are submerged. In fig. 1, there are four effective detection signals 1, 2, 3, 4 in a normal non-interference state when the detection object has no vibration, and in fig. 2, when the interference signal caused by the vibration of the engine working machine submerges the effective small signal 4, which may result in that the effective signal 4 cannot be distinguished and the accuracy of the detection data is affected.
In addition, in the on-line monitoring of the metal abrasive particles in the onboard oil, because the engine has different vibration conditions in different working states, the engine drives the pipeline oil and the detection sensor to vibrate together mechanically, the frequency, amplitude and phase of vibration in different working states change greatly, and an interference signal cannot be filtered by a fixed signal filter in the continuous change of the working state of the engine, so that a flexibly-changing filtering method is urgently needed to realize the filtering of the vibration signal.
Aiming at the problems of the defects, the invention adopts the following technical scheme.
Disclosure of Invention
The invention aims to provide a method and a device for synchronously filtering an electromagnetic eddy current detection signal by using a vibration signal, and the technical scheme is as follows:
a method for synchronously filtering electromagnetic eddy current detection signals by using vibration signals is used for monitoring airborne oil metal abrasive particles or detecting electromagnetic eddy currents of other irregular jumping metal pipe rod wires and the like in an online vibration working state, and can adopt an acceleration sensor, such as an acceleration sensor arranged on the edge of the electromagnetic detection sensor or arranged on a detection object such as an aircraft engine shell, and is characterized in that synchronous vibration frequency, amplitude and phase information of the detection object are picked up, and then the electromagnetic eddy current detection signals are synchronously filtered, and the specific method comprises the following steps:
a. installing detection equipment: installing an electromagnetic eddy current detection sensor device on an object to be detected, synchronously assembling a vibration interference signal detection device, and starting on-line monitoring;
b. online monitoring and detecting: synchronously extracting frequency, amplitude and phase signals of mechanical vibration acceleration of a detection object while carrying out online monitoring detection on the electromagnetic eddy current;
c. and (3) detection signal filtering processing: performing signal processing such as simulation on the vibration frequency, amplitude and phase signals extracted by the vibration interference signal detection device, and performing filtering processing on the electromagnetic eddy current detection signals;
d. effective on-line monitoring signal pickup: and extracting the filtered electromagnetic eddy current online monitoring data, analyzing and storing in a data processing instrument.
And c, synchronously extracting the frequency, amplitude and phase signals of the mechanical vibration of the detection object in the step b, wherein the signals are obtained by extracting the acceleration signal pattern analysis of the detection object in the vibration. The vibration acceleration signal of the detected object can be extracted by one of a sound vibration acceleration sensor, an electromagnetic acceleration sensor and the like.
Further, the step b synchronously extracts the frequency, amplitude and phase signals of the mechanical vibration of the detection object, and calculates and analyzes the vibration acceleration signal by extracting the lift-off value of the coil of the electromagnetic eddy current detection sensor.
And the electromagnetic eddy current detection sensor coil used for calculating and analyzing the vibration acceleration signal of the lift-off value is a plurality of detection sensor coils longitudinally arranged on the detection surface.
Furthermore, the detection sensor coil longitudinally arranged on the detection surface is formed by longitudinally overlapped coils with elastic pieces in the middle, and the distance value between the two coils is extracted to be used as a vibration acceleration signal for calculation and analysis during electromagnetic eddy current detection. The elastic member may be a spring, or a spacer made of a soft material such as sponge, foam, or silica gel.
Further, longitudinally overlapping coil sets of the elastic member are spaced therebetween, wherein the coil proximate the detection surface is disposed for securement to the detection sensor assembly.
Furthermore, in the longitudinal overlapped coil group of the middle spacing elastic part, the fixed coil close to the detection surface is a large-diameter coil, a plurality of small-diameter coils arranged on the upper layer in the longitudinal direction are arranged on the same plane, when the electromagnetic eddy current is detected, the small-diameter coils respectively extract the distance values between the small-diameter coils and the large-diameter coils to be used as calculation and analysis vibration acceleration signals, and the distance values between each small-diameter coil and the large-diameter coil are compared and analyzed to calculate the vector value of the vibration acceleration.
The invention also discloses a device for synchronously filtering the electromagnetic eddy current detection signal by using the vibration signal, which comprises a detection data processing instrument (3), a detection probe shell (1) and an electromagnetic eddy current detection sensor (2) arranged in the shell (1), and is characterized in that the electromagnetic eddy current detection sensor (2) further comprises a detection coil (21) and an acceleration coil (22) used for extracting the vibration acceleration signal, wherein the acceleration coil (22) and the electromagnetic eddy current detection coil (21) are overlapped and fixed in the longitudinal direction of the detection surface at intervals through an elastic piece (23).
Wherein, the electromagnetic eddy current detection coil (21) is fixed on the lower side surface of the shell (1).
Furthermore, the acceleration coil (22) is provided with a plurality of small-diameter coils (22) and is fixed on the same horizontal plane right above the electromagnetic eddy current detection coil (21) by a plurality of same elastic pieces (23). The vibration acceleration signals are extracted in the vector direction by analyzing the time sequence and the amplitude of the vibration signals of the small acceleration coils.
According to the technical scheme, the invention has the following beneficial effects:
the invention relates to a method and a device for synchronously filtering electromagnetic eddy current detection signals by using vibration signals. The method utilizes the information of a group of vibration detecting sensors, well solves the problem of the quality reduction of effective signals of electromagnetic eddy current detection caused by the irregular jumping of a detected object, and particularly obtains more satisfactory effect on the electromagnetic detection signal processing of the oil monitoring of the airborne engine;
the invention relates to a method and a device for synchronously filtering electromagnetic eddy current detection signals by using vibration signals, wherein acceleration signals of vibration are synchronously extracted through the coil arrangement of an electromagnetic eddy current detection sensor, so that signal noise caused by vibration of a detection object is extracted in real time during online monitoring of electromagnetic eddy current, unnecessary noise signals are filtered, even when oil abrasive particles of an online running engine of an engine system such as aerospace, automobiles and the like are detected, noise signals under different running states can be flexibly detected in real time, the noise of the detection signals is filtered, effectively smaller signals are prevented from being submerged, the detection sensitivity is improved, and the signal-to-noise ratio of electromagnetic eddy current detection is improved;
the invention also discloses a device for synchronously filtering the electromagnetic eddy current detection signal by utilizing the vibration signal.
Drawings
FIG. 1 is a signal diagram of the present invention;
FIG. 2 is a signal diagram of an embodiment of the present invention;
FIG. 3 is a signal diagram of an embodiment of the present invention;
FIG. 4 is a schematic flow chart of a method according to a preferred embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a detecting device according to a preferred embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a detecting device according to a preferred embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a detecting device according to a preferred embodiment of the present invention;
fig. 8 is an exploded view of the detecting device according to the preferred embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
As shown in fig. 4, a method for synchronously filtering an electromagnetic eddy current test signal by using a vibration signal, which is used in an airborne oil metal abrasive particle monitoring or electromagnetic eddy current testing of other irregular jumping metal pipe rod lines and the like under an online vibration working state, can adopt an acceleration sensor, such as being installed on the edge of the electromagnetic test sensor or also being installed on a test object such as an aircraft engine shell, and is characterized in that synchronous vibration frequency, amplitude and phase information of the test object are picked up, and then the electromagnetic eddy current test signal is synchronously filtered, and the specific method steps are as follows:
a. installing detection equipment: installing an electromagnetic eddy current detection sensor device on an object to be detected, synchronously assembling a vibration interference signal detection device, and starting on-line monitoring;
b. online monitoring and detecting: synchronously extracting frequency, amplitude and phase signals of mechanical vibration acceleration of a detection object while carrying out online monitoring detection on the electromagnetic eddy current;
c. and (3) detection signal filtering processing: performing signal processing such as simulation on the vibration frequency, amplitude and phase signals extracted by the vibration interference signal detection device, and performing filtering processing on the electromagnetic eddy current detection signals;
d. effective on-line monitoring signal pickup: and extracting the filtered electromagnetic eddy current online monitoring data, analyzing and storing in a data processing instrument.
And c, synchronously extracting the frequency, amplitude and phase signals of the mechanical vibration of the detection object in the step b, wherein the signals are obtained by extracting the acceleration signal pattern analysis of the detection object in the vibration. The vibration acceleration signal of the detected object can be extracted by one of a sound vibration acceleration sensor, an electromagnetic acceleration sensor and the like.
Further, the step b synchronously extracts the frequency, amplitude and phase signals of the mechanical vibration of the detection object, and calculates and analyzes the vibration acceleration signal by extracting the lift-off value of the coil of the electromagnetic eddy current detection sensor.
And the electromagnetic eddy current detection sensor coil used for calculating and analyzing the vibration acceleration signal of the lift-off value is a plurality of detection sensor coils longitudinally arranged on the detection surface.
Furthermore, the detection sensor coil longitudinally arranged on the detection surface is formed by longitudinally overlapped coils with elastic pieces in the middle, and the distance value between the two coils is extracted to be used as a vibration acceleration signal for calculation and analysis during electromagnetic eddy current detection. The elastic member may be a spring, or a spacer made of a soft material such as sponge, foam, or silica gel.
Further, longitudinally overlapping coil sets of the elastic member are spaced therebetween, wherein the coil proximate the detection surface is disposed for securement to the detection sensor assembly.
Furthermore, in the longitudinal overlapped coil group of the middle spacing elastic part, the fixed coil close to the detection surface is a large-diameter coil, a plurality of small-diameter coils arranged on the upper layer in the longitudinal direction are arranged on the same plane, when the electromagnetic eddy current is detected, the small-diameter coils respectively extract the distance values between the small-diameter coils and the large-diameter coils to be used as calculation and analysis vibration acceleration signals, and the distance values between each small-diameter coil and the large-diameter coil are compared and analyzed to calculate the vector value of the vibration acceleration.
As shown in fig. 1, there are four effective detection signals 1, 2, 3, 4 in a signal diagram when the detection object does not vibrate, and there is no influence or interference of signal noise, but as shown in fig. 2, in a state where the mechanical vibration during the operation of the engine brings interference signals, it is likely that the small signal 4 is submerged, so that the effective signal 4 cannot be distinguished, and as shown in fig. 3, in a detection signal diagram after filtering processing by the technical scheme of the present invention under the condition that the detection object vibrates, the interference of vibration waveforms is obviously reduced, and the signal-to-noise ratio of the effective signal for electromagnetic eddy current detection is improved.
As shown in fig. 5 and fig. 6, the present invention further discloses a device for synchronously filtering an electromagnetic eddy current detection signal by using a vibration signal, which is connected to a detection data processing instrument by a wire 31 or a wireless device, and comprises a detection data processing instrument 3, a detection probe housing 1 and an electromagnetic eddy current detection sensor 2 arranged inside the housing 1, wherein the electromagnetic eddy current detection sensor 2 further comprises a detection coil 21 and an acceleration coil 22 for extracting a vibration acceleration signal, wherein the acceleration coil 22 and the electromagnetic eddy current detection coil 21 are overlapped and fixed in the longitudinal direction of a detection surface at intervals by an elastic member 23.
The electromagnetic eddy current detection coil 21 is fixed to the lower side surface of the case 1.
Further, the acceleration coil 22 is provided with a plurality of small-diameter coils 22, and is fixed on the same horizontal plane right above the electromagnetic eddy current detection coil 21 by a plurality of same elastic members 23. The vibration acceleration signals are extracted in the vector direction by analyzing the time sequence and the amplitude of the vibration signals of the small acceleration coils.
As shown in fig. 7 and 8, when a plurality of small acceleration coils are used to extract a vibration acceleration signal, a planar spiral coil is more easily implemented, an electromagnetic eddy current detection coil is a large planar spiral coil 21, a plurality of small acceleration coils 22 are fixed directly above the planar spiral coil 21 of the electromagnetic eddy current detection sensor by a plurality of elastic members 23, and the vibration acceleration frequency, amplitude, phase signal and time sequence value of each small acceleration coil 22 are detected and analyzed to calculate and analyze the vibration vector signal value of a detection object (such as an engine oil pipeline, a metal pipe rod on a production line, and the like).
The above is one embodiment of the present invention. Furthermore, it is to be understood that all equivalent or simple changes in the structure, features and principles described in the present patent concepts are included in the scope of the present patent.
Claims (10)
1. A method for synchronously filtering electromagnetic eddy current detection signals by using vibration signals is characterized in that synchronous vibration frequency, amplitude and phase information of a detected object are picked up, and then synchronous filtering processing is carried out on the electromagnetic eddy current detection signals, and the specific method comprises the following steps:
a. installing detection equipment: installing an electromagnetic eddy current detection sensor device on an object to be detected, synchronously assembling a vibration interference signal detection device, and starting on-line monitoring;
b. online monitoring and detecting: synchronously extracting frequency, amplitude and phase signals of mechanical vibration acceleration of a detection object while carrying out online monitoring detection on the electromagnetic eddy current;
c. and (3) detection signal filtering processing: performing signal processing such as simulation on the vibration frequency, amplitude and phase signals extracted by the vibration interference signal detection device, and performing filtering processing on the electromagnetic eddy current detection signals;
d. effective on-line monitoring signal pickup: and extracting the filtered electromagnetic eddy current online monitoring data, analyzing and storing in a data processing instrument.
2. The method of claim 1, wherein said step b of synchronously extracting the frequency, amplitude and phase signals of the mechanical vibration of the test object is performed by extracting the acceleration signal pattern of the test object in the vibration.
3. The method of claim 1, wherein the step b of synchronously extracting the frequency, amplitude and phase signals of the mechanical vibration of the object to be detected is to calculate and analyze the vibration acceleration signal by extracting the lift-off value of the coil of the electromagnetic eddy current sensor.
4. The method according to claim 3, wherein the eddy current test sensor coils for calculating the vibration acceleration signal for analyzing the lift-off value are a plurality of test sensor coils arranged longitudinally on the test surface.
5. The method as claimed in claim 4, wherein the detection sensor coils longitudinally arranged on the detection surface are formed by longitudinally overlapping coils with elastic members therebetween, and the distance between the two coils is extracted as the vibration acceleration signal for calculation and analysis during the electromagnetic eddy current detection.
6. A method for simultaneously filtering an electromagnetic eddy current test signal with a vibration signal as recited in claim 5, wherein said longitudinally overlapping coil sets of spaced apart elastomeric members are positioned such that the coils adjacent the test surface are secured to the test sensor assembly.
7. The method according to claim 6, wherein the fixed coils near the detection surface of the longitudinally overlapped coil sets of the middle spacing elastic member are large diameter coils, a plurality of small diameter coils arranged on the upper layer in the longitudinal direction are arranged on the same plane, the small diameter coils respectively extract the distance value between each small diameter coil and the large diameter coil as the vibration acceleration signal for calculation and analysis, and the vector value of the vibration acceleration is calculated by comparing and analyzing the distance value between each small diameter coil and the large diameter coil.
8. The utility model provides an utilize device of synchronous filtering electromagnetic eddy current detection signal of vibration signal, is including detecting data processing instrument (3), test probe casing (1) and setting up in inside electromagnetic eddy current detection sensor (2) of casing (1), its characterized in that electromagnetic eddy current detection sensor (2) still include detection coil (21) and acceleration coil (22) that are used for extracting vibration acceleration signal, wherein, overlap through elastic component (23) interval between acceleration coil (22) and the electromagnetic eddy current detection coil (21) and fix in the longitudinal direction of testing the face.
9. An arrangement for synchronous filtering of eddy current test signals with vibration signals according to claim 8, characterized in that the eddy current coil (21) is fixed to the underside of the housing (1).
10. The oil electromagnetic detection device for simultaneously acquiring temperature information according to claim 8, wherein the acceleration coil (22) is provided with a plurality of small diameter coils (22), and a plurality of same elastic members (23) are fixed on the same horizontal plane right above the electromagnetic eddy current detection coil (21).
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09280942A (en) * | 1996-02-15 | 1997-10-31 | Tadatoshi Goto | Multi-directional vibration detector |
| CN1912550A (en) * | 2006-08-18 | 2007-02-14 | 江苏伟屹电子有限公司 | Vibration inteference control method of vortex street flowmeter |
| CN101722284A (en) * | 2009-09-17 | 2010-06-09 | 杭州谱诚泰迪实业有限公司 | Vibration detection device and detection method for continuous casting crystallizer |
| CN102680030A (en) * | 2011-01-31 | 2012-09-19 | 克洛纳测量技术有限公司 | Vortex flowmeter |
| CN102818915A (en) * | 2011-06-07 | 2012-12-12 | 日本电波工业株式会社 | Acceleration measuring apparatus |
| CN202886236U (en) * | 2012-09-06 | 2013-04-17 | 爱德森（厦门）电子有限公司 | Device for improving online monitoring precision of engine oil metal abrasive particle |
| CN112665856A (en) * | 2020-12-16 | 2021-04-16 | 华东交通大学 | Online monitoring system for gear box |
-
2021
- 2021-08-21 CN CN202110964106.3A patent/CN113624648A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09280942A (en) * | 1996-02-15 | 1997-10-31 | Tadatoshi Goto | Multi-directional vibration detector |
| CN1912550A (en) * | 2006-08-18 | 2007-02-14 | 江苏伟屹电子有限公司 | Vibration inteference control method of vortex street flowmeter |
| CN101722284A (en) * | 2009-09-17 | 2010-06-09 | 杭州谱诚泰迪实业有限公司 | Vibration detection device and detection method for continuous casting crystallizer |
| CN102680030A (en) * | 2011-01-31 | 2012-09-19 | 克洛纳测量技术有限公司 | Vortex flowmeter |
| CN102818915A (en) * | 2011-06-07 | 2012-12-12 | 日本电波工业株式会社 | Acceleration measuring apparatus |
| CN202886236U (en) * | 2012-09-06 | 2013-04-17 | 爱德森（厦门）电子有限公司 | Device for improving online monitoring precision of engine oil metal abrasive particle |
| CN112665856A (en) * | 2020-12-16 | 2021-04-16 | 华东交通大学 | Online monitoring system for gear box |
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