CN110118829A - A kind of test macro and method of the amplitude-frequency characteristic of acoustic emission sensor - Google Patents
A kind of test macro and method of the amplitude-frequency characteristic of acoustic emission sensor Download PDFInfo
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
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Abstract
The invention discloses a kind of test macros of the amplitude-frequency characteristic of acoustic emission sensor, it include: swept frequency excitation source, elastic wave exciter, sphenoid structure, acoustic emission sensor and acoustic emission signal acquisition system, sphenoid structure is made of material identical with damage solid to be measured, swept frequency excitation source and elastic wave exciter communicate to connect, and acoustic emission sensor and acoustic emission signal acquisition system communicate to connect.The key property that the interaction and the two of test macro of the invention for acoustic emission sensor amplitude-frequency response characteristic depending on the material and structure of acoustic emission sensor and tested solid are mutually matched, realization illustrates the amplitude-frequency characteristic of acoustic emission sensor to be measured in a manner of two-dimentional scatter plot, to the more intuitive amplitude-frequency characteristic for representing acoustic emission sensor to be measured, so as to the subsequent acoustic emission sensor best for current damage solid material selection amplitude-frequency characteristic to be measured.
Description
Technical field
The present invention relates to the field of test technology of sensor performance, in particular to a kind of amplitude-frequency characteristic of acoustic emission sensor
Test macro and method.
Background technique
Acoustic emission sensor is the Primary Component for testing solid structure damage, currently used for developing the material of acoustic emission sensor
There are many material, such as: piezoceramic material, piezoelectric membrane and optical fiber.The sound to match with tested solid structure how is selected to send out
Penetrate the important prerequisite that sensor is damage monitoring engineer application.Amplitude-frequency response characteristic of the acoustic emission sensor to tested solid structure
It is to measure the most important index of acoustic emission sensor, but there are no bright to the amplitude-frequency characteristic of acoustic emission sensor this index at present
True test device and method.Acoustic emission sensor is primarily due to not only to depend on the amplitude-frequency response characteristic of tested solid structure
In the material and structure of acoustic emission sensor ontology, it is also limited to material and structure of tested solid etc., is one mutually total
The comprehensive effect of same-action.
Summary of the invention
It is insufficient in above-mentioned background technique the purpose of the present invention is overcoming, a kind of amplitude-frequency characteristic of acoustic emission sensor is provided
Test macro and method depend on the material of acoustic emission sensor and tested solid for acoustic emission sensor amplitude-frequency response characteristic
The key property that interaction and the two with structure are mutually matched is realized the amplitude-frequency of acoustic emission sensor to be measured is special
Property illustrated in a manner of two-dimentional scatter plot, so that the more intuitive amplitude-frequency for representing acoustic emission sensor to be measured is special
Property, so as to the subsequent acoustic emission sensor best for current damage solid material selection amplitude-frequency characteristic to be measured.
In order to reach above-mentioned technical effect, the present invention takes following technical scheme:
A kind of test macro of the amplitude-frequency characteristic of acoustic emission sensor, comprising: swept frequency excitation source, elastic wave exciter, wedge
Physique structure, acoustic emission sensor and acoustic emission signal acquisition system, wherein sphenoid structure uses and damage solid phase to be measured
Same material is made, and elastic wave exciter and acoustic emission sensor are mounted in sphenoid structure and are located at sphenoid structure table
The sustained height in face, swept frequency excitation source are connect with elastic wave exciter by signal wire, acoustic emission sensor and acoustic emission signal
Acquisition system is connected by signal wire；Specifically, swept frequency excitation source is the equipment for generating the periods voltage signal such as wideband, and its frequency
Rate range is continuously adjusted in 0~1MHz, and signal waveform is continuously to wait cycle Sine waves, using existing swept frequency excitation source
It satisfies the use demand, elastic wave exciter is the device that can be acted on tested solid and generate wideband elastic wave, voice sending sensor
To be measured object of the device as the technical program, amplitude-frequency response characteristic is the physical characteristic of technical solution of the present invention, and by bullet
Property wave exciter frequency range limitation, the amplitude-frequency characteristic frequency range that final test goes out can be less than the frequency of elastic wave exciter
Range, acoustic emission signal acquisition system are used to record the crest voltage V of acoustic emission sensor detection, and are depicted as abscissa as frequency
Rate, the two-dimentional scatter plot that ordinate is voltage magnitude, can be satisfied the use demand using existing acoustic emission signal acquisition system.
Further, the effective voltage for the voltage signal that the swept frequency excitation source generates is no more than the volume of elastic wave exciter
Constant voltage.
Further, the elastic wave exciter is in 0~1MHz frequency range with the continuous elastic wave of same intensity
Incentive functions or the elastic wave exciter be within the scope of 100~500kHz, the elastic wave of flatness fluctuation range < 3dB swashs
Device is encouraged, in other ranges, flatness fluctuation range can increase.
Further, the minimum thickness of the sphenoid structure is not higher than 10mm, and maximum gauge is not less than 20mm, and length is not
Less than 100mm, and the ratio between width and thickness difference are not less than 8.
Further, the amplitude-frequency response signal that acoustic emission signal acquisition system sample rate is higher, obtains is truer, AD conversion
The signal amplitude that digit is higher, test obtains is more accurate, thus preferably the acoustic emission signal acquisition system for sample rate 10MHz with
Upper, AD conversion is not less than 16 voltage signal acquisition devices.
Further, the signal wire is the coaxial cable with electro-magnetic screen function.
Further, in order to ensure can be propagated in the sphenoid structure between elastic wave exciter and acoustic emission sensor
The elastic wave of at least one complete cycle, the elasticity wave exciter and acoustic emission sensor are between the center in sphenoid structure
Gauge is not more than 10 λ from being not less than 2 λ, wherein λ indicates the elastic wave wavelength that elastic wave exciter issues, unit: mm；λ=
V/f, wherein v is the speed that elastic wave is propagated in sphenoid structure, unit: km/s；F is acoustic emission signal acquisition system warp
The basic frequency of signal frequency that acoustic emission sensor obtains, unit: kHz；Wherein, it then can be used directly when v is known numeric value, it can also be certainly
Row measurement obtains, and specific measurement method is in embodiment for example, f can then believe the collected waveform of acoustic emission sensor
Number carry out Fast Fourier Transform (FFT) (FFT), then the corresponding frequency of maximum amplitude is basic frequency of signal.
Further, the edge of elastic wave exciter its center positional distance sphenoid structure in sphenoid structure
Not less than 2 λ, so that it is guaranteed that the elastic wave energy of sphenoid structural edge reflection will not be with the bullet of directly arrival acoustic emission sensor
Property wave energy aliasing.
Meanwhile the invention also discloses a kind of test methods of the amplitude-frequency characteristic of acoustic emission sensor, by above-mentioned one kind
The test macro realization of the amplitude-frequency characteristic of acoustic emission sensor, and the following steps are included:
A. a certain height and position is selected in sphenoid structure, and elastic wave exciter and acoustic emission sensor are installed on wedge
On physique structure and complete the connection in swept frequency excitation source and elastic wave exciter and acoustic emission sensor and acoustic emission signal acquire
The connection of system；
B. start swept frequency excitation source and sound emission signal acquiring system, modulate the waveform in swept frequency excitation source, make its signal wave
Shape is continuously to wait cycle Sine waves, and the effective voltage of the voltage signal generated is no more than the voltage rating of elastic wave exciter；
C. the frequency in swept frequency excitation source is gradually risen at interval of aHz to 1MHz by 1kHz；
D. the crest voltage V of the acoustic emission sensor detection of each spacing frequency is recorded by acoustic emission signal acquisition system,
It is then plotted into the two-dimentional scatter plot that abscissa is frequency, ordinate is voltage magnitude, then the two-dimentional scatter plot is the sound
The amplitude-frequency characteristic schematic diagram of emission sensor then can be seen that by the two-dimentional scatter plot that acoustic emission signal acquisition system is drawn and work as
Preceding acoustic emission sensor is most sensitive to the elastic wave in which frequency range in sphenoid structure, thus for selection and sphenoid knot
The damage solid to be measured of the identical material of structure provides reliable test device.
Meanwhile can by different materials or acoustic emission sensor of different shapes, step is tested according to the method described above, from
And judge that each acoustic emission sensor is tested this amplitude-frequency response characteristic of solid structure according to two-dimentional scatter plot, and select to meet
The acoustic emission sensor of demand, meanwhile, it can also be according to the specific thickness of tested solid structure, by elastic wave exciter and sound emission
Sensor is fixed on corresponding height position in sphenoid structure, to simulate the test environment for being more in line with practical situation.
Further, in the step C, the value of a is 1,000, in practice, can also select other conjunctions as the case may be
Suitable spacing frequency value.
Compared with prior art, the present invention have it is below the utility model has the advantages that
The test macro and method of the amplitude-frequency characteristic of acoustic emission sensor of the invention are, it can be achieved that acoustic emission sensor
Amplitude-frequency characteristic is tested, and the material of acoustic emission sensor and tested solid is depended on for acoustic emission sensor amplitude-frequency response characteristic
The key property that interaction and the two of the material with structure are mutually matched, is realized the amplitude-frequency of acoustic emission sensor to be measured
Characteristic is illustrated in a manner of two-dimentional scatter plot, so that the more intuitive amplitude-frequency for representing acoustic emission sensor to be measured is special
Property, so as to the subsequent acoustic emission sensor best for current damage solid material selection amplitude-frequency characteristic to be measured.It also makes up simultaneously
The defect for the device and method in the prior art not measured specifically for the amplitude-frequency characteristic of acoustic emission sensor.
Detailed description of the invention
Fig. 1 is the schematic diagram of the test macro of the amplitude-frequency characteristic of acoustic emission sensor of the invention.
Fig. 2 is the signal that the device for the speed that elastic wave is propagated in sphenoid structure is measured in one embodiment of the invention
Figure.
Appended drawing reference: 1- swept frequency excitation source；2- elasticity wave exciter；3- sphenoid structure；4- acoustic emission sensor；5- sound
Emit signal acquiring system, 11- acoustic emission signal acquisition device, 12- preamplifier, 13- wedge shape solid structure, 14- piezoelectricity
Ceramic acoustic emission transducer.
Specific embodiment
Below with reference to the embodiment of the present invention, the invention will be further elaborated.
Embodiment:
Embodiment one:
As shown in Figure 1, a kind of test macro of the amplitude-frequency characteristic of acoustic emission sensor, comprising: swept frequency excitation source 1, elasticity
Wave exciter 2, sphenoid structure 3, acoustic emission sensor 4 and acoustic emission signal acquisition system 5.
Wherein, sphenoid structure 3 is made of material identical with damage solid to be measured, and elastic wave exciter 2 is sent out with sound
It penetrates sensor 4 and is mounted on the sustained height in sphenoid structure 3 and being located at 3 surface of sphenoid structure, swept frequency excitation source 1 and bullet
Property wave exciter 2 connected by signal wire, acoustic emission sensor 4 connect with acoustic emission signal acquisition system 5 by signal wire.Make
To be preferred, the signal wire is the coaxial cable with electro-magnetic screen function.
Specifically, swept frequency excitation source 1 is the equipment for generating the periods voltage signal such as wideband, and its frequency range 0~
It is continuously adjusted in 1MHz, signal waveform is continuously to wait cycle Sine waves, and the voltage signal of the swept frequency excitation source 1 generation has
Imitate the voltage rating that voltage is no more than elastic wave exciter 2.It can be satisfied the use demand using existing swept frequency excitation source 1, this
In embodiment, the model in the swept frequency excitation source 1 of use are as follows: 33210a Keysight.
Elastic wave exciter 2 is the device that can be acted on tested solid and generate wideband elastic wave, described in the present embodiment
Elastic wave exciter 2 preferably has the function of the continuous elastic wave excitation of same intensity in 0~1MHz frequency range, but at present
In the prior art without such ideal component, therefore in the present embodiment, the elasticity wave exciter 2 is in 100~500kHz
In range, the elastic wave exciter 2 of flatness fluctuation range < 3dB, in other ranges, flatness fluctuation range can increase
Greatly, and in the present embodiment the model of the elastic wave exciter 2 used are as follows: Nano30 Physical Acoustics
Corporation。
To be measured object of the acoustic emission sensor 4 as the technical program, amplitude-frequency response characteristic are technical sides of the invention
The physical characteristic of case, and limited by the frequency range of elastic wave exciter 2, the amplitude-frequency characteristic frequency range that final test goes out can be small
In the frequency range of elastic wave exciter 2, the present embodiment, in specific test, different model different materials can be selected and be made
Acoustic emission sensor 4 tested, to judge and select the amplitude-frequency response characteristic optimal sound hair to damage solid to be measured
Penetrate sensor 4.
Acoustic emission signal acquisition system 5 is used to record the crest voltage V of the detection of acoustic emission sensor 4, and is depicted as horizontal seat
It is designated as frequency, the two-dimentional scatter plot that ordinate is voltage magnitude, can be met using existing acoustic emission signal acquisition system 5 is made
Use demand.Specifically, 5 sample rate of acoustic emission signal acquisition system is higher in the present embodiment, the amplitude-frequency response signal of acquisition is trueer
Real, the signal amplitude that AD conversion digit is higher, test obtains is more accurate, in the present embodiment, the preferably described acoustic emission signal acquisition
System 5 is sample rate 10MHz or more, AD conversion is not less than 16 voltage signal acquisition devices, and used in the present embodiment
The model of acoustic emission signal acquisition system 5 are as follows: Express8 Physical Acoustics Corporation.
Specifically, the minimum thickness of the sphenoid structure 3 is not higher than 10mm, and maximum gauge is not less than in the present embodiment
20mm, length is not less than 100mm, and the ratio between width and thickness difference are not less than 8.
In the present embodiment, in order to ensure energy in the sphenoid structure 3 between elastic wave exciter 2 and acoustic emission sensor 4
The elastic wave of at least one complete cycle is enough propagated, the elasticity wave exciter 2 and acoustic emission sensor 4 are in sphenoid structure 3
On center spacing distance be not less than 2 λ, and be not more than 10 λ, meanwhile, it is described elasticity wave exciter 2 in sphenoid structure 3 its
Edge of the center apart from sphenoid structure 3 is not less than 2 λ, so that it is guaranteed that the elastic wave energy of 3 edge reflections of sphenoid structure
It will not be with the elastic wave energy aliasing of directly arrival acoustic emission sensor 4.
Wherein, λ indicates the elastic wave wavelength that elastic wave exciter 2 issues, unit: mm；λ=v/f, v are elastic wave in wedge
The speed propagated in physique structure 3, unit: km/s, v then can be used directly when being known common numerical value, can also voluntarily measure and obtain
?；F is the basic frequency of signal frequency that acoustic emission signal acquisition system 5 is obtained through acoustic emission sensor 4, can be adopted to acoustic emission sensor
The waveform signal that collects carries out Fast Fourier Transform (FFT) (FFT), then the corresponding frequency of maximum amplitude is basic frequency of signal, unit:
kHz。
When needing voluntarily to measure the speed v that elastic wave is propagated in sphenoid structure, then following technical scheme can be used:
Firstly, as shown in Fig. 2, the speed v that measurement elastic wave is propagated in sphenoid structure needs following device, specific packet
It includes: acoustic emission signal acquisition device 11 (model Express8@Physical Acoustics Corporation), before two
Set amplifier 12 (2/4/6 Physical Acoustics Corporation of model), wedge-shaped solid structure 13 (with it is above-mentioned
The structure and material of sphenoid structure are identical) and two (model Nano30@Physical of piezoelectric ceramics acoustic emission transducer 14
Acoustics Corporation), wherein piezoelectric ceramics acoustic emission transducer 14 is installed on wedge-shaped solid structure 13, and two
The center of a piezoelectric ceramics acoustic emission transducer 14 is located at the sustained height of wedge-shaped solid structure 13, preamplifier 12 and piezoelectricity
Ceramic acoustic emission transducer 14 is corresponded and is connected by signal wire, preamplifier 12 and acoustic emission signal acquisition device 11
It is connected by signal wire.
Wherein, setting pulse number is 5 in acoustic emission signal acquisition device 11, pulse width is 5 μ s, pulse spacing
Time is 1000ms, sample frequency 10MHz.
When measurement, each components are first attached and are installed and activated piezoelectric ceramics acoustic emission transducer 14, preceding storing
Big device 12, acoustic emission signal acquisition device 11；When installation, the spacing distance between two piezoelectric ceramics acoustic emission transducers 14 is
Si(SiNot less than 60mm), then swashed by the pulse that acoustic emission signal acquisition device 11 records piezoelectric ceramics acoustic emission transducer 14
Signal and receive time and the waveform of signal, wherein it can be obtained from the waveform that acoustic emission signal acquisition device 11 acquires, when
Under preceding experimental condition, the signal reception time that acoustic emission signal acquisition device 11 records is tj；Receive waveform front end weak voltage
Signal duration tjx；The signal transmission time that acoustic emission signal acquisition device 11 records is tf；The faint electricity in transmitted waveform front end
Pressure signal duration is tfx, it is known that, when the spacing distance between two piezoelectric ceramics acoustic emission transducers 14 is SiWhen, wave
Propagation time is ti: ti=(tj+tjx)-(tf+tfx), then the speed that elastic wave is propagated in sphenoid structure 3 can pass through formula Si
=v (ti-ts) seek, with SiFor ordinate, tiDescribe scatter plot for abscissa, and fits certain temperature using least square method
Under using solid stress wave propagation rate v as a linear equation of slope；Wherein tsFor swashing for acoustic emission signal acquisition device 11
It encourages and receives time error intrinsic existing for circuit.
It should be noted that above-mentioned merely provide a kind of speed v propagated in sphenoid structure to measure elastic wave
A kind of measurement method, in practice, also can be selected other measurement v measurement method.
Embodiment two
A kind of test method of the amplitude-frequency characteristic of acoustic emission sensor, by a kind of amplitude-frequency of above-mentioned acoustic emission sensor 4
The test macro realization of characteristic, and the following steps are included:
Step 1 selects a certain height and position in sphenoid structure 3, by elastic wave exciter 2 and acoustic emission sensor 4
It is installed in sphenoid structure 3 and completes connection and acoustic emission sensor 4 and the sound in swept frequency excitation source 1 and elastic wave exciter 2
Emit the connection of signal acquiring system 5；
Step 2 starts swept frequency excitation source 1 and sound emission signal acquiring system 5, modulates the waveform in swept frequency excitation source 1, makes
Its signal waveform is continuously to wait cycle Sine waves, and the effective voltage of the voltage signal generated is no more than elastic wave exciter 2
Voltage rating；
Step 3 gradually rises the frequency in swept frequency excitation source 1 at interval of 1kHz to 1MHz by 1kHz；
The peak value that step 4 is detected by the acoustic emission sensor 4 that acoustic emission signal acquisition system 5 records each spacing frequency
Voltage V is then plotted into the two-dimentional scatter plot that abscissa is frequency, ordinate is voltage magnitude, then the two-dimentional scatter plot is
For the amplitude-frequency characteristic schematic diagram of the acoustic emission sensor 4, then it is by the two-dimentional scatter plot that acoustic emission signal acquisition system 5 is drawn
It can be seen that current acoustic emission sensor 4 is most sensitive to the elastic wave in which frequency range in sphenoid structure 3, thus for selection
The damage solid to be measured of material identical as sphenoid structure 3 provides reliable test device.
Meanwhile can by different materials or acoustic emission sensor of different shapes 4, step is tested according to the method described above, from
And judge that each acoustic emission sensor 4 is tested this amplitude-frequency response characteristic of solid structure according to two-dimentional scatter plot, and select full
The acoustic emission sensor 4 of sufficient demand, meanwhile, it can also be according to the specific thickness of tested solid structure, by elastic wave exciter 2 and sound
Emission sensor 4 is fixed on corresponding height position in sphenoid structure 3, to simulate the test wrapper for being more in line with practical situation
Border.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of test macro of the amplitude-frequency characteristic of acoustic emission sensor characterized by comprising swept frequency excitation source, elastic wave
Driver, sphenoid structure, acoustic emission sensor and acoustic emission signal acquisition system, wherein sphenoid structure use with it is to be measured
The identical material of damage solid is made, and elastic wave exciter and acoustic emission sensor are mounted in sphenoid structure and are located at wedge
The sustained height on physique structure surface, swept frequency excitation source and elastic wave exciter communicate to connect, acoustic emission sensor and sound emission
Signal acquiring system communication connection.
2. a kind of test macro of the amplitude-frequency characteristic of acoustic emission sensor according to claim 1, which is characterized in that described
The effective voltage for the voltage signal that swept frequency excitation source generates is no more than the voltage rating of elastic wave exciter.
3. a kind of test macro of the amplitude-frequency characteristic of acoustic emission sensor according to claim 1, which is characterized in that described
Elastic wave exciter has the function of that the continuous elastic wave excitation of same intensity or the elastic wave swash in 0~1MHz frequency range
Encouraging device is within the scope of 100~500kHz, the elastic wave exciter of flatness fluctuation range < 3dB.
4. a kind of test macro of the amplitude-frequency characteristic of acoustic emission sensor according to claim 1, which is characterized in that described
The minimum thickness of sphenoid structure is not higher than 10mm, and maximum gauge is not less than 20mm, and length is not less than 100mm, and width and thickness
It spends the ratio between difference and is not less than 8.
5. a kind of test macro of the amplitude-frequency characteristic of acoustic emission sensor according to claim 1, which is characterized in that described
Acoustic emission signal acquisition system is the voltage signal acquisition device of sample rate 10MHz or more, AD conversion not less than 16.
6. a kind of test macro of the amplitude-frequency characteristic of acoustic emission sensor according to claim 1, which is characterized in that described
Swept frequency excitation source is connect with elastic wave exciter by signal wire, and acoustic emission sensor and acoustic emission signal acquisition system pass through letter
The connection of number line, and the signal wire is the coaxial cable with electro-magnetic screen function.
7. a kind of test macro of the amplitude-frequency characteristic of acoustic emission sensor according to claim 1, which is characterized in that described
The center spacing distance of elastic wave exciter and acoustic emission sensor in sphenoid structure is not less than 2 λ, and is not more than 10 λ,
In, λ indicates the elastic wave wavelength that elastic wave exciter issues, unit: mm；λ=v/f, wherein v is elastic wave in sphenoid knot
The speed propagated in structure, unit: km/s；F is the basic frequency of signal frequency that acoustic emission signal acquisition system is obtained through acoustic emission sensor
Rate, unit: kHz.
8. a kind of test macro of the amplitude-frequency characteristic of acoustic emission sensor according to claim 7, which is characterized in that described
The edge of elastic wave exciter its center positional distance sphenoid structure in sphenoid structure is not less than 2 λ.
9. a kind of test method of the amplitude-frequency characteristic of acoustic emission sensor, which is characterized in that by institute any in claim 1 to 8
A kind of test macro realization of the amplitude-frequency characteristic for the acoustic emission sensor stated, and the following steps are included:
A. a certain height and position is selected in sphenoid structure, and elastic wave exciter and acoustic emission sensor are installed on sphenoid
In structure and complete the connection and acoustic emission sensor and acoustic emission signal acquisition system in swept frequency excitation source and elastic wave exciter
Connection；
B. start swept frequency excitation source and sound emission signal acquiring system, modulate the waveform in swept frequency excitation source, its signal waveform is made to be
It is continuous to wait cycle Sine waves, and the effective voltage of the voltage signal generated is no more than the voltage rating of elastic wave exciter；
C. the frequency in swept frequency excitation source is gradually risen at interval of aHz to 1MHz by 1kHz；
D. the crest voltage V of the acoustic emission sensor detection of each spacing frequency is recorded by acoustic emission signal acquisition system, then
It is depicted as the two-dimentional scatter plot that abscissa is frequency, ordinate is voltage magnitude, then the two-dimentional scatter plot is the sound emission
The amplitude-frequency characteristic schematic diagram of sensor.
10. a kind of test method of the amplitude-frequency characteristic of acoustic emission sensor according to claim 9, which is characterized in that institute
It states in step C, the value of a is 1,000.
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| CN110547825A (en) * | 2019-09-03 | 2019-12-10 | 上海交通大学 | Ultrasonic elastography technology based on multi-frequency shear wave amplitude analysis |
| CN112557515A (en) * | 2020-10-30 | 2021-03-26 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Acoustic emission sensor test system |
| CN113219411A (en) * | 2021-05-06 | 2021-08-06 | 哈尔滨工业大学 | Nondestructive equivalent sound source excitation method for simulating ultrahigh-speed impact sound emission of space debris |
| CN114813964A (en) * | 2022-04-24 | 2022-07-29 | 中国工程物理研究院化工材料研究所 | Method for deciding crack initiation damage of brittle material structural part by adopting time domain information |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5767853A (en) * | 1980-10-15 | 1982-04-24 | Yakichi Higo | Method for standardization of ae signal and discrimination of ae signal source |
| JPH0194258A (en) * | 1987-10-06 | 1989-04-12 | Koyo Seiko Co Ltd | Diagnostic apparatus |
| KR20080102082A (en) * | 2007-05-18 | 2008-11-24 | 한국전기연구원 | The position controlling and noise eliminating apparatus for calibrating acoustic emission sensors |
| CN101446507A (en) * | 2008-09-02 | 2009-06-03 | 北京声华兴业科技有限公司 | USB2.0 multifunctional acoustic emission detection system |
| CN105277623A (en) * | 2015-11-11 | 2016-01-27 | 华北理工大学 | Determination method for rock catastrophe acoustic emission dominant frequency band |
| CN206146884U (en) * | 2016-09-22 | 2017-05-03 | 沈阳工学院 | Acoustic emission sensor calbiration system |
| US20170199162A1 (en) * | 2016-01-11 | 2017-07-13 | Fisher Controls International Llc | Methods and apparatus to verify operation of acoustic emission sensors |
| CN210427470U (en) * | 2019-06-27 | 2020-04-28 | 中国工程物理研究院化工材料研究所 | Test system for amplitude-frequency characteristic of acoustic emission sensor |
-
2019
- 2019-06-27 CN CN201910568305.5A patent/CN110118829A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5767853A (en) * | 1980-10-15 | 1982-04-24 | Yakichi Higo | Method for standardization of ae signal and discrimination of ae signal source |
| JPH0194258A (en) * | 1987-10-06 | 1989-04-12 | Koyo Seiko Co Ltd | Diagnostic apparatus |
| KR20080102082A (en) * | 2007-05-18 | 2008-11-24 | 한국전기연구원 | The position controlling and noise eliminating apparatus for calibrating acoustic emission sensors |
| CN101446507A (en) * | 2008-09-02 | 2009-06-03 | 北京声华兴业科技有限公司 | USB2.0 multifunctional acoustic emission detection system |
| CN105277623A (en) * | 2015-11-11 | 2016-01-27 | 华北理工大学 | Determination method for rock catastrophe acoustic emission dominant frequency band |
| US20170199162A1 (en) * | 2016-01-11 | 2017-07-13 | Fisher Controls International Llc | Methods and apparatus to verify operation of acoustic emission sensors |
| CN206146884U (en) * | 2016-09-22 | 2017-05-03 | 沈阳工学院 | Acoustic emission sensor calbiration system |
| CN210427470U (en) * | 2019-06-27 | 2020-04-28 | 中国工程物理研究院化工材料研究所 | Test system for amplitude-frequency characteristic of acoustic emission sensor |
Non-Patent Citations (3)
| Title |
|---|
| 于忠涛 等: "《桥隧结构检测技术》", 30 September 2007, 人民交通出版社, pages: 148 * |
| 何肇弘 等: "《既有建筑物质量检验与可靠性评定》", 30 April 1992, 中国铁道出版社, pages: 123 - 125 * |
| 陈潇 等: "基于NI LabVIEW的声发射传感器校准系统的设计", 《工业仪表与自动化装置》, no. 6, pages 45 - 48 * |
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|---|---|---|---|---|
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| CN110547825B (en) * | 2019-09-03 | 2022-04-26 | 上海交通大学 | Ultrasonic elastography technology based on multi-frequency shear wave amplitude analysis |
| CN112557515A (en) * | 2020-10-30 | 2021-03-26 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Acoustic emission sensor test system |
| CN112557515B (en) * | 2020-10-30 | 2023-12-12 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Acoustic emission sensor test system |
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