CN113109437A - Pultrusion multi-cavity plate composite material nondestructive testing device - Google Patents
Pultrusion multi-cavity plate composite material nondestructive testing device Download PDFInfo
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- CN113109437A CN113109437A CN202110404119.5A CN202110404119A CN113109437A CN 113109437 A CN113109437 A CN 113109437A CN 202110404119 A CN202110404119 A CN 202110404119A CN 113109437 A CN113109437 A CN 113109437A
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- 239000002131 composite material Substances 0.000 title claims abstract description 34
- 238000009659 non-destructive testing Methods 0.000 title claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 32
- 238000004458 analytical method Methods 0.000 claims abstract description 17
- 230000001133 acceleration Effects 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 5
- 238000010408 sweeping Methods 0.000 claims description 4
- 238000011897 real-time detection Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 11
- 230000007547 defect Effects 0.000 description 10
- 238000012545 processing Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000013598 vector Substances 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000012706 support-vector machine Methods 0.000 description 4
- 238000003745 diagnosis Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
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- 239000000835 fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
Abstract
A pultrusion multi-cavity plate composite material nondestructive testing device relates to a composite material nondestructive testing device, and the pultrusion multi-cavity plate composite material nondestructive testing device consists of a multi-cavity plate knocking testing device and a data acquisition analysis and drive testing system circuit control part; the device comprises a movable sliding table track (1), a welding support frame (2), a vibration exciter (3), a composite material multi-cavity plate (4), a clamping plate (5), a lower support frame (6), an acceleration sensor (7), a data acquisition card (8), a sweep frequency signal generator (9), a computer (10) and a driving system control circuit (11); a multi-cavity plate to be detected of the device is arranged between an upper clamping plate and a lower support and is connected and fastened through an M screw and a nut, a movable sliding table track is installed and fixed on the support, and a knocking device moves back and forth in all directions on the upper surface; the invention realizes the real-time nondestructive detection of the composite material pultrusion multi-cavity knocking vibration signal extraction.
Description
Technical Field
The invention relates to a nondestructive testing device for a composite material, in particular to a nondestructive testing device for a pultruded multi-cavity plate composite material.
Background
The composite material pultrusion process is a process of heating and curing molding continuous fibers impregnated with resin glue solution through a molding die under the action of the pulling force of a tractor. However, in the pultrusion production process, production factors such as temperature, traction speed, traction force, pressure and the like have certain influence on the product. These instability factors can cause incomplete curing and local defects of the product. If a production line end observation method is adopted, the method can only detect the product before hours, has large hysteresis, does not pay attention to the defects at first, and can influence the reliability of the product due to rapid development of the defects, and can stop the product in a whole line when the defects are more serious. Therefore, real-time nondestructive detection of the composite material produced on line is required. The nondestructive inspection is a technology for detecting defects, chemical and physical parameters of materials, parts and equipment by adopting ray, ultrasonic, infrared, electromagnetic and other principle technologies and combining with instruments on the premise of not damaging or influencing the use performance of an object to be detected. However, the above method is expensive and increases the production cost and working time of the multi-cavity plate composite material for the processing, production and detection of the enterprises. And the detection is based on the principle technologies of ultrasound, ray, infrared, electromagnetism and the like, and is not feasible.
When the composite material pultrusion multi-cavity plate is produced on line, defects are sometimes generated, so that the production line is in failure or even completely stops, and therefore real-time nondestructive detection needs to be carried out on the composite material produced on line.
Disclosure of Invention
The invention aims to provide a nondestructive testing device for a pultruded multi-cavity plate composite material, which utilizes a vibration principle, wavelet packet analysis and digital signal processing, is adsorbed on the multi-cavity plate through an acceleration sensor, realizes real-time processing and analysis on vibration signals of the multi-cavity plate, aims at solving the problem of production line failure and even complete shutdown caused by the possible defects generated during online production of the composite multi-cavity plate.
The purpose of the invention is realized by the following technical scheme:
a pultrusion multi-cavity plate composite material nondestructive testing device is composed of a multi-cavity plate knocking testing device and a data acquisition, analysis and drive testing system circuit control part; the device comprises a movable sliding table track, a welding support frame, a vibration exciter, a composite material multi-cavity plate, a clamping plate, a lower support, an acceleration sensor, a data acquisition card, a sweep frequency signal generator, a computer and a driving system control circuit; a multi-cavity plate to be detected of the device is arranged between an upper clamping plate and a lower support and is connected and fastened through an M screw and a nut, a movable sliding table track is installed and fixed on the support, and a knocking device moves back and forth in all directions on the upper surface;
the data acquisition and analysis part is formed by attaching an acceleration sensor to the surface of the composite material multi-cavity plate, a sweep frequency signal generator, a signal acquisition card, a data bus connection and a computer;
the control part of the detection device is externally provided with a two-phase stepping motor to provide power to enable the vibration exciter knocking device to do reciprocating motion on the moving sliding table track through a program preset by a controller, and then the mode of selecting a control signal and the subdivision setting of current are selected through a driver; the running speed is uniform motion, real-time detection can be carried out on the multi-cavity plate, the knocking frequency is controlled by the sweep frequency signal generator, meanwhile, the knocking frequency can be subjected to parameter setting in advance, and then the system works according to the set parameters.
The nondestructive testing device for the pultrusion multi-cavity plate composite material is characterized in that a vibration exciter is fixed on an I-shaped sliding table and is externally connected with a sweep frequency signal generator, and the vibration exciter receives a waveform sent by the signal generator and makes corresponding knocking vibration.
The nondestructive detection device for the pultrusion multi-cavity plate composite material is characterized in that the detection device provides power through a two-phase stepping motor, converts electric energy into mechanical energy for controlling a vibration exciter to do reciprocating motion on a movable sliding table, and then is connected with the vibration exciter through a frequency sweeping signal generator to control the knocking frequency through different waveforms, amplitudes, rotating speeds and control modes.
The invention has the advantages and effects that:
1. the invention aims at the problem that the production line is failed or even completely stopped because the composite multi-cavity plate possibly has defects during online production. The invention relates to a test bed of an intelligent knocking detection device, which is characterized in that a vibration principle, wavelet packet analysis and digital signal processing are applied, and an acceleration sensor is adsorbed on a multi-cavity plate, so that real-time processing and analysis of vibration signals of the multi-cavity plate can be realized.
2. The detection device consists of a vibration knocking test bed, a computer signal analysis system and a detection driving system, and can complete the real-time nondestructive detection task of the composite material multi-cavity plate.
3. The detection principle of the experimental detection device is mainly that the SA-SG030 frequency sweep signal generator controls the knocking frequency of the vibration exciter, the detection control system is driven to control the knocking stroke of the vibration exciter, then corresponding vibration signals are collected through an LMS data acquisition card to carry out wavelet packet analysis, the characteristic vector of the vibration signals is extracted, and then whether defects exist is judged according to the energy ratio. Compare in traditional hammer of power and strike the judgement, this multicavity board detects experimental apparatus and obtains vibration signal more accurate, is favorable to the nondestructive test of multicavity board when on-line production.
4. The knocking stroke of the experimental device is mainly controlled by a driving control system. The external power supply installs step motor in KNK and removes corresponding position on the slip track, then the stroke is controlled through double-phase step driver, controller to reach accurate omnidirectional and strike the diagnosis.
Drawings
FIG. 1 is a schematic structural view of a multi-cavity plate knock detection apparatus according to the present invention;
FIG. 2 is a schematic diagram of the computer signal analysis components of the present invention;
FIG. 3 is a schematic view of the detection control components of the driving system of the present invention.
The components in the figure are as follows: the device comprises a movable sliding table track 1, a welding support frame 2, a vibration exciter 3, a composite material multi-cavity plate 4, a clamping plate 5, a lower support frame 6, an acceleration sensor 7, a data acquisition card 8, a sweep frequency signal generator 9, a computer 10 and a driving system control circuit 11.
Detailed Description
The present invention will be described in detail with reference to the embodiments shown in the drawings.
The invention consists of a multi-cavity plate knocking detection device and a data acquisition analysis and drive detection system circuit control part. The device comprises a movable sliding table track 1, a welding support frame 2, a vibration exciter 3, a composite material multi-cavity plate 4, a clamping plate 5, a lower support frame 6, an acceleration sensor 7, a data acquisition card 8, a sweep frequency signal generator 9, a computer 10 and a driving system control circuit 11.
The multi-cavity plate detection device of the invention is shown in figure 1: a multi-cavity plate to be detected is arranged between the upper clamping plate and the lower support and is connected and fastened with an M10 nut through an M10 screw, and a KNK movable sliding table rail is fixedly arranged on the support frame, so that the knocking device can conveniently do all-around reciprocating motion on the upper surface. And secondly, a vibration exciter for knocking the multi-cavity plate composite material is fixed on the I-shaped sliding table and is externally connected with a frequency sweeping signal generator, and the vibration exciter receives the waveform sent by the signal generator and performs corresponding knocking vibration. The detection device provided by the invention provides power through the two-phase stepping motor, converts electric energy into mechanical energy for controlling the vibration exciter to reciprocate on the KNK moving sliding table, and then is connected with the vibration exciter through the A-SG030 frequency sweeping signal generator to control the frequency of knocking through different waveforms, amplitudes and rotating speeds.
The data acquisition and analysis part of the invention is composed of an acceleration sensor attached to the surface of a composite material multi-cavity plate, a sweep frequency signal generator, an LMS signal acquisition card, a data bus connection and a computer, as shown in figure 2.
The control scheme of the detection device is shown in fig. 3: an additional two-phase stepping motor (57 HS 22-A) provides power to enable the vibration exciter knocking device to do reciprocating motion on the KNK moving sliding table track through a program preset by a controller, and then a control signal mode and current subdivision setting are selected through a driver. The running speed is uniform motion, real-time detection can be carried out on the multi-cavity plate, the knocking frequency is controlled by the SA-SG030 frequency sweep signal generator, meanwhile, the parameter setting can be carried out on the knocking frequency in advance, and then the system works according to the set parameters (default values).
The device comprises a motor, a power supply, a vibration sensor, a computer and a power supply, wherein the motor is arranged on a detection platform, the power supply is externally connected with the motor to supply power for the detection platform to work, the vibration sensor is used for collecting vibration signals, and the computer is used for processing and analyzing the signals received and detected in real time.
The control mode is as follows: the control mode of the detection platform is realized by manually switching on a power supply by an operator and setting corresponding knocking frequency and the rotating speed of the two-phase stepping motor.
And (3) detecting a walking process: the vibration exciter arranged on the KNK moving sliding table does reciprocating motion (uniform motion) under the condition that the external signal generator sends out corresponding waveforms by the power provided by the motor, so that the acquisition of vibration signals is realized.
Acquiring a vibration signal: as shown in fig. 2. The detection device can generate corresponding vibration signals when being knocked on the multi-cavity plate every time, and the signals generated at different parts can be visually observed through computer-aided software. Therefore, the signals generated by different parts can be used for intuitively judging which parts are defective and normal parts.
The fault diagnosis principle is as follows: the knocking vibration signals are collected and analyzed, multi-layer decomposition is carried out on the knocking vibration signals through wavelet packet analysis, and the frequency band energy after decomposition is used as a feature vector. And classifying and identifying the feature vectors subjected to normalization processing by using a Support Vector Machine (SVM), and judging by comparing different signals generated by the normal part and the defect part.
Setting knocking frequency parameters: the tapping frequency parameter of the detection platform can be determined by an SA-SG030 sweep signal generator. Under the frequency, the extraction of the knocking vibration signal is visual, the collected signal is subjected to multi-layer decomposition on the knocking vibration signal through wavelet packet analysis, and the decomposed frequency band energy is used as a feature vector.
The invention relates to a nondestructive testing technology for extracting knocking vibration signals of a composite material pultrusion multi-cavity plate. And acquiring a vibration signal by adopting a knocking test method, performing multi-layer decomposition on the knocking vibration signal by utilizing wavelet packet analysis, and taking the decomposed frequency band energy as a characteristic vector. And carrying out classification and identification on the feature vectors subjected to the normalization processing by using a Support Vector Machine (SVM). Therefore, real-time nondestructive detection of composite material pultrusion multi-cavity knocking vibration signal extraction is realized.
Claims (3)
1. The nondestructive detection device for the pultruded multi-cavity plate composite material is characterized by comprising a multi-cavity plate knocking detection device and a circuit control part of a data acquisition, analysis and drive detection system; the device comprises a movable sliding table track (1), a welding support frame (2), a vibration exciter (3), a composite material multi-cavity plate (4), a clamping plate (5), a lower support frame (6), an acceleration sensor (7), a data acquisition card (8), a sweep frequency signal generator (9), a computer (10) and a driving system control circuit (11); a multi-cavity plate to be detected of the device is arranged between an upper clamping plate and a lower support and is connected and fastened through an M screw and a nut, a movable sliding table track is installed and fixed on the support, and a knocking device moves back and forth in all directions on the upper surface;
the data acquisition and analysis part is formed by attaching an acceleration sensor to the surface of the composite material multi-cavity plate, a sweep frequency signal generator, a signal acquisition card, a data bus connection and a computer;
the control part of the detection device is externally provided with a two-phase stepping motor to provide power to enable the vibration exciter knocking device to do reciprocating motion on the moving sliding table track through a program preset by a controller, and then the mode of selecting a control signal and the subdivision setting of current are selected through a driver; the running speed is uniform motion, real-time detection can be carried out on the multi-cavity plate, the knocking frequency is controlled by the sweep frequency signal generator, meanwhile, the knocking frequency can be subjected to parameter setting in advance, and then the system works according to the set parameters.
2. The nondestructive testing device for the pultruded multi-cavity plate composite material according to claim 1, wherein the vibration exciter is fixed on the I-shaped sliding table and externally connected with a sweep frequency signal generator, and the vibration exciter receives the waveform sent by the signal generator and performs corresponding knocking vibration.
3. The nondestructive testing device for the pultruded multi-cavity plate composite material according to claim 1, wherein the testing device is powered by a two-phase stepping motor, converts electric energy into mechanical energy for controlling the vibration exciter to reciprocate on the movable sliding table, and is connected with the vibration exciter through a frequency sweeping signal generator to control the frequency of knocking through different waveforms, amplitudes and rotating speeds.
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| CN202110404119.5A CN113109437A (en) | 2021-04-15 | 2021-04-15 | Pultrusion multi-cavity plate composite material nondestructive testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117554487A (en) * | 2024-01-10 | 2024-02-13 | 中建海龙科技有限公司 | Wall structure internal damage detection method and system |
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| CN204116284U (en) * | 2014-10-27 | 2015-01-21 | 中国民航大学 | A kind of aircraft cellular structural composite material knocks and detects and non-destructive tests device |
| CN106053600A (en) * | 2016-06-29 | 2016-10-26 | 航天材料及工艺研究所 | Automatic detection system and method for multi-channel impact of composite material adhesive structure |
| CN110068612A (en) * | 2019-04-11 | 2019-07-30 | 中国民航大学 | A kind of multiple spot percussion more points collection formula technique for aircraft composite detection system |
| CN110646510A (en) * | 2019-10-09 | 2020-01-03 | 北京林业大学 | Nondestructive testing test bench and method for wooden component by knocking method |
| US20200271543A1 (en) * | 2017-09-18 | 2020-08-27 | Board Of Regents, The University Of Texas System | Mobile railway track defect detection |
| CN112097717A (en) * | 2020-07-27 | 2020-12-18 | 兰州交通大学 | Gap detection system and method based on collision vibration |
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2021
- 2021-04-15 CN CN202110404119.5A patent/CN113109437A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204116284U (en) * | 2014-10-27 | 2015-01-21 | 中国民航大学 | A kind of aircraft cellular structural composite material knocks and detects and non-destructive tests device |
| CN106053600A (en) * | 2016-06-29 | 2016-10-26 | 航天材料及工艺研究所 | Automatic detection system and method for multi-channel impact of composite material adhesive structure |
| US20200271543A1 (en) * | 2017-09-18 | 2020-08-27 | Board Of Regents, The University Of Texas System | Mobile railway track defect detection |
| CN110068612A (en) * | 2019-04-11 | 2019-07-30 | 中国民航大学 | A kind of multiple spot percussion more points collection formula technique for aircraft composite detection system |
| CN110646510A (en) * | 2019-10-09 | 2020-01-03 | 北京林业大学 | Nondestructive testing test bench and method for wooden component by knocking method |
| CN112097717A (en) * | 2020-07-27 | 2020-12-18 | 兰州交通大学 | Gap detection system and method based on collision vibration |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117554487A (en) * | 2024-01-10 | 2024-02-13 | 中建海龙科技有限公司 | Wall structure internal damage detection method and system |
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