CN110398539A - Cantilever crane crack monitoring method and crackle monitoring device - Google Patents
Cantilever crane crack monitoring method and crackle monitoring device Download PDFInfo
- Publication number
- CN110398539A CN110398539A CN201910704448.4A CN201910704448A CN110398539A CN 110398539 A CN110398539 A CN 110398539A CN 201910704448 A CN201910704448 A CN 201910704448A CN 110398539 A CN110398539 A CN 110398539A
- Authority
- CN
- China
- Prior art keywords
- signal
- cantilever crane
- acoustic emission
- cracks
- crackle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- G01N29/14—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 using acoustic emission techniques
-
- 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
- G01N29/46—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by spectral analysis, e.g. Fourier analysis or wavelet analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- Signal Processing (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Acoustics & Sound (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The present invention provides a kind of cantilever crane crack monitoring method and crackle monitoring device, cantilever crane crack monitoring method includes: to detect the acoustic emission signal of cantilever crane；Signal of Cracks corresponding with the acoustic emission signal is determined according to the acoustic emission signal；Security level corresponding with the Signal of Cracks is determined according to the Signal of Cracks.In this programme, security level corresponding with Signal of Cracks is determined by Signal of Cracks, for artificial visual inspection cantilever crane crackle, it realizes and the online real-time perfoming of cantilever crane is detected, the acoustic emission signal detected is analyzed in real time simultaneously, its degree of danger is divided, it gives warning in advance to potential risk of breakage, effectively avoid accident, improve the safety of equipment, simultaneously, utilize the acoustic emission signal of acoustic emission sensor detection cantilever crane, without artificial detection, it is greatly saved the workload of staff, and it is more accurate compared with the testing result of visual detection.
Description
Technical field
The present invention relates to crack monitoring fields, supervise in particular to a kind of cantilever crane crack monitoring method and a kind of crackle
Survey device.
Background technique
Concrete mixer is to build common Mobile engineering machine in all kinds of modern projects building, is that a kind of will be used to pump
The pumping mechanism of concrete and the boom system for cloth is sent to be integrated in the special-purpose vehicle on automobile chassis.Concrete mixer is applied
Working hour working environment is severe, and operating condition is complicated, and wherein cantilever crane is main load bearing component, mainly includes cantilever crane self weight, concreter
Make load, inertia force, pumping other additional loads such as dynamic loading and lateral wind load, since material initial crack, welding lack
It falls into, the abnormal factors such as the fatigue fracture caused by factors such as environmental corrosion, material deformation often bringing on a disaster property consequence.Therefore,
Real-time monitoring is carried out to the fault of construction especially crackle of pumping vehicle arm rack, for effectively preventing and controlling the generation of major accident,
Safety in production is promoted to have great importance.It is predominantly artificial to the detection of concrete pump truck arm crackle at the construction field (site) at present
Visual inspection checks that frequency is difficult to determine, the labor intensity of the excessively high then testing staff of frequency is excessive, and underfrequency is then easy to make
At missing inspection.Ray detection, ultrasound detection, Magnetic testing, Liquid penetrant testing and electromagnetic detection etc. then are carried out to Suspected Area, these
The deficiency of method include it is sensitive to geometry, partial sweep can only be carried out, need to shut down test and be easy to cause missing inspection etc.,
Therefore its testing result have biggish limitation, and for crackle inspection especially equipment construction when on-line monitoring always
It is difficulties.
Summary of the invention
At least one in order to solve the above-mentioned technical problem, it is an object of the present invention to provide a kind of cantilever crane crack monitorings
Method.
It is another object of the present invention to provide a kind of crackle monitoring devices.
To achieve the above object, the embodiment of first aspect present invention provides a kind of cantilever crane crack monitoring method, comprising:
Detect the acoustic emission signal of cantilever crane；Signal of Cracks corresponding with the acoustic emission signal is determined according to the acoustic emission signal；Root
Security level corresponding with the Signal of Cracks is determined according to the Signal of Cracks.
In a kind of cantilever crane crack monitoring method that the above embodiment of the present invention provides, believe by the way that Signal of Cracks is determining with crackle
Number corresponding security level is realized and is detected to the online real-time perfoming of cantilever crane, simultaneously compared with for manually visualizing and checking cantilever crane crackle
The acoustic emission signal detected is analyzed in real time, its degree of danger is divided, it is pre- in advance to potential risk of breakage
It is alert, accident is effectively avoided, the safety of equipment is improved, meanwhile, utilize the sound emission of acoustic emission sensor detection cantilever crane
Signal is not necessarily to artificial detection, is greatly saved the workload of staff, and more accurate compared with the testing result of visual detection,
Acoustic emission sensor obtains acoustic emission signal in real time, and detection is efficiently and accurate, can effectively avoid the risk of missing inspection.
In addition, the cantilever crane crack monitoring method in above-described embodiment provided by the invention can also have following supplementary technology
Feature:
In above-mentioned technical proposal, it is described detection cantilever crane acoustic emission signal the step of before, it is further comprising the steps of: really
The area to be tested of the fixed cantilever crane；Voice sending sensor corresponding with the area to be tested is determined according to the area to be tested
Number of channels in device and acoustic emission detector, so that in the acoustic emission signal of the detection cantilever crane the step of, sound hair
Penetrate the acoustic emission signal that sensor detects the corresponding area to be tested.
In the present solution, determine cantilever crane area to be tested, and according to area to be tested determination it is corresponding with area to be tested
Acoustic emission sensor and acoustic emission detector in number of channels, in this way, each area to be tested be designed with it is corresponding
It is improved so that treating detection zone is measured in real time acoustic emission signal in channel in acoustic emission sensor and acoustic emission detector
The precision of detection, and then improve the safety of equipment.
In above-mentioned technical proposal, the area to be tested of the determination cantilever crane is specifically included: detecting the load of the cantilever crane
Lotus distribution, and according to the area to be tested of the determining cantilever crane of load distribution.
In the present solution, the area to be tested for determining cantilever crane is distributed according to the load of cantilever crane, in this way, passing through the load to cantilever crane
The calculating of lotus distribution, finds out the region that the stress on cantilever crane is biggish, is easy to produce crackle, realizes for relatively weak on cantilever crane
Region be measured in real time, determine the cracks of weakness zone on cantilever crane in real time, so that detection efficiency is higher, detect more smart
It is quasi-.
In above-mentioned technical proposal, the area to be tested of the determination cantilever crane is specifically included: acquisition is opened with model cantilever crane
The historical statistical data of failure is split, and the area to be tested is determined according to the historical statistical data.
In the present solution, the region for being also easy to produce crackle according to the cantilever crane of the same model counted in historical statistical data is true
Determine area to be tested, in the region that same model cantilever crane has cracked, realization is directed on cantilever crane and is easy to happen cracking for emphasis detection
Region be measured in real time, determine the cracks of weakness zone on cantilever crane in real time, so that detection efficiency is higher, detect more smart
It is quasi-.
It is described that sound emission corresponding with the area to be tested is determined according to the area to be tested in above-mentioned technical proposal
Number of channels in sensor and acoustic emission detector specifically includes: to each area to be tested, determining described at least three
Acoustic emission sensor is corresponding to it, and determines that the channel of acoustic emission detector described at least three is corresponding to it.
In the present solution, each area to be tested determines that acoustic emission sensor described at least three is corresponding to it, and determine extremely
The channel of few 3 acoustic emission detectors is corresponding to it, and multiple acoustic emission sensors simultaneously carry out area to be tested real-time
Detection realizes that acoustic emission sensor preferably captures acoustic emission signal, improves the precision of detection.
In any of the above-described technical solution, described corresponding with the acoustic emission signal according to acoustic emission signal determination
Among the step of Signal of Cracks, comprising the following steps: the acoustic emission signal is amplified and recorded；It extracts amplified
The signal characteristic of the acoustic emission signal；The progress of the signal characteristic in the obtained signal characteristic and database will be extracted
Match, and the Signal of Cracks is determined according to matching result.
In the present solution, amplified to acoustic emission signal, the signal characteristic of acoustic emission signal is extracted, passes through what is extracted
Signal characteristic match with the signal characteristic in database obtaining Signal of Cracks, and acoustic emission detector is to acoustic emission signal
Effective selection is carried out, determines the acoustic emission signal generated in acoustic emission signal by crackle, and the sound emission generated by crackle is believed
It number is denoted as crackle and penetrates signal, it is accurate and effective to filter out crackle from multiple acoustic emission signals and penetrate signal, improve the accurate of detection
Degree.
In any of the above-described technical solution, safety corresponding with the Signal of Cracks is determined according to the Signal of Cracks described
In the step of rank, comprising the following steps: extract the characteristic parameter of the Signal of Cracks；According to the Signal of Cracks extracted
Characteristic parameter determine corresponding with Signal of Cracks security level.
In the present solution, determine determination security level corresponding with Signal of Cracks according to the characteristic parameter of Signal of Cracks, lead to
The degree of danger of cantilever crane crackle can more intuitively be determined by crossing security level, so that more rapid make corresponding processing, be saved
Staff analyzes the time of Signal of Cracks, and for relatively manually visualizing and checking cantilever crane crackle, judges the standard of security level
It is apparent clear, judge that the accuracy rate of security level is higher.
In above-mentioned technical proposal, the characteristic parameter includes crackle event number and interior average crack letter per second in per second
Number amplitude, wherein if the crackle event number in per second is lower than 3, the arm support safe rank is I grades；If splitting in per second
Line event number is 3~8, and interior average crack signal amplitude per second is greater than 60dB and when being less than or equal to 70dB, then described
Arm support safe rank is II grades；If the crackle event number in per second is to continue to increase or be greater than 8, and interior average crack per second
When signal amplitude is greater than 70dB, then the arm support safe rank is III level.
In the present solution, security level is divided into three-level, the degree of danger from I grades to III level is gradually increased, by safety
The division of rank, make testing staff can with clear and definite understanding cantilever crane degree of danger, to make corresponding processing rapidly,
For example, indicating that Signal of Cracks is relatively weak, equipment is in a safe condition, can continue to use, be not necessarily to when security level is I grades
Reinspection, when security level is II grades, expression needs to pay close attention to crackle, and periodically rechecks, and is III level in security level
When, indicate that equipment is in the hole, it is necessary to stop using, and recheck immediately using other means.
In above-mentioned technical proposal, if internal fissure event number per second has no less than 5 amplitudes to be greater than 70dB Signal of Cracks, institute
It states arm support safe rank and is at least III level.
In the present solution, if internal fissure event number per second has no less than 5 amplitudes to be greater than 70dB Signal of Cracks, expression crackle
Signal is stronger, and cantilever crane has the danger of fracture, needs to arouse attention, stop using immediately, and is rechecked using other means.
In any of the above-described technical solution, safety corresponding with the Signal of Cracks is determined according to the Signal of Cracks described
It is further comprising the steps of after the step of rank: alarm corresponding with the security level is issued according to the security level.
In the present solution, issue corresponding with security level alarm according to security level, such as pass through the modes such as blow a whistle
Staff is reminded, so that staff is timely determined the security situation of cantilever crane by alarm, is set without observing always
It is standby, greatly alleviate the workload of staff.
The embodiment of second aspect of the present invention provides a kind of crackle monitoring device, comprising: processor；It is described for storing
The memory of processor-executable instruction, wherein the processor be used to execute stored in the memory it is described executable
The step of cantilever crane crack monitoring method as described in any one of the above embodiments is realized when instruction.
The crackle monitoring device that the above embodiment of the present invention provides, by executing arm described in any of the above-described technical solution
Frame crack monitoring method, to have all of the above beneficial effect, details are not described herein.
Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention
Recognize.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the schematic flow diagram of cantilever crane crack monitoring method described in one embodiment of the invention；
Fig. 2 is the schematic flow diagram of cantilever crane crack monitoring method described in one embodiment of the invention；
Fig. 3 is the waveform diagram of Signal of Cracks in database described in one embodiment of the invention；
Fig. 4 is the spectrogram of Signal of Cracks in database described in one embodiment of the invention；
Fig. 5 is the structural schematic diagram of cantilever crane described in one embodiment of the invention；
Fig. 6 is the structural schematic diagram of cantilever crane and acoustic emission sensor described in one embodiment of the invention；
Fig. 7 is cantilever crane loading procedure timing diagram described in one embodiment of the invention；
Fig. 8 is the acoustic emission signal amplitude versus time relational graph of cantilever crane described in one embodiment of the invention；
Fig. 9 is the waveform diagram of the Signal of Cracks of cantilever crane described in one embodiment of the invention；
Figure 10 is the spectrogram of the Signal of Cracks of cantilever crane described in one embodiment of the invention；
Figure 11 is the schematic block diagram of crackle monitoring device described in one embodiment of the invention.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
The cantilever crane crack monitoring method described according to some embodiments of the invention and crackle prison are described referring to Fig. 1 to Figure 11
Survey device.
As shown in Figure 1, the cantilever crane crack monitoring method that the embodiment of first aspect present invention provides, comprising: step 102,
Detect the acoustic emission signal of cantilever crane；Step 104, Signal of Cracks corresponding with acoustic emission signal is determined according to acoustic emission signal；Step
Rapid 106, security level corresponding with Signal of Cracks is determined according to Signal of Cracks.
In a kind of cantilever crane crack monitoring method that the above embodiment of the present invention provides, believe by the way that Signal of Cracks is determining with crackle
Number corresponding security level is realized and is detected to the online real-time perfoming of cantilever crane, simultaneously compared with for manually visualizing and checking cantilever crane crackle
The acoustic emission signal detected is analyzed in real time, its degree of danger is divided, and potential risk of breakage is shifted to an earlier date
Early warning effectively avoids accident, improves the safety of equipment, meanwhile, it is sent out using the sound of acoustic emission sensor detection cantilever crane
Signal is penetrated, artificial detection is not necessarily to, is greatly saved the workload of staff, and more smart compared with the testing result of visual detection
It is quasi-.
In a specific embodiment of the invention, as shown in Figures 2 to 11, the performance of concrete mixer is as shown in table 1,
Middle cantilever crane steel plate material: SG1000 steel (tensile strength 1000MPa rank).
Acoustic emission detection instrument, data collecting card port number are 3.
Acoustic emission sensor: 140 ± 20%kHz of its resonant frequency.
1 concrete mixer of table and cantilever crane key dimension table
| Vehicle overall length (m) | Beam overall (m) | Total height (m) | It is self-possessed (kg) |
| 10.05 | 2.53 | 3.85 | 23000 |
| Cantilever crane vertical height (m) | Cantilever crane horizontal length (m) | Cantilever crane vertical depth (m) | Minimum expansion height (m) |
| 36.5 | 31.8 | 24.8 | 7.5 |
As shown in Fig. 2, step 202: testing common different size cantilever crane acoustic emission signal, extract signal characteristic, establish number
According to library, specifically, common different size steel plate mother metal and weldment is counted, using three-point bending fatigue test method, tried
It tests room and studies fatigue crack initiation, the acoustic emission signal of expansion process on small exemplar, signal characteristic is extracted, such as Fig. 3 and Fig. 4 institute
The waveform diagram and spectrogram of 6mm base material and 8mm base material butt welding fitting Typical Cracks signal, establish data in the present embodiment shown
Library.
As shown in Fig. 2, step 204: determining the larger carrying position or the biggish portion of cracking risk of concrete pump truck arm
Position specifically according to the actual use operating condition of cantilever crane, carries out force analysis of finite element for jib structure, determines larger carrying
Position is located at the second joint arm stub end side plate and top plate fillet weld concentration, i.e. in Fig. 5 at A.
It is of course also possible to determine that cracking risk is biggish according to the historical data that statistics fails with the Study of Boom Cracking of model
Position.
Specifically, position to be detected can be stress concentration region, the welding defect area or a certain that may be present in cantilever crane
Near the end of joint arm frame.
As shown in Fig. 2, step 206: the quantity according to the quantity at larger carrying position or the biggish position of cracking risk is true
Determine acoustic emission sensor quantity and detecting instrument port number, specifically, the larger supporting part of cantilever crane is obtained according to above-mentioned steps 204
Bit quantity is at 1, then acoustic emission sensor quantity and detecting instrument port number are 3, as shown in fig. 6, one of sound emission
Sensor is fixed on the top board surface at larger carrying position, other two acoustic emission sensor is separately fixed at larger carrying position
Side plate surface, according to the characteristic of metal material and database accumulate as a result, the monitoring frequency of acoustic emission sensor needed for determining
Rate range are as follows: 100kHz~450kHz further can also carry out disconnected lead experiment, it is ensured that acoustic emission sensor is good with cantilever crane
Good coupling, further increases the precision of detection.
As shown in Fig. 2, step 208: the collected signal of acoustic emission sensor being amplified and recorded, specifically, is protected
Support leg of pump truck expansion, cantilever crane are held close to horizontal stretching state, and closes pump truck engine, hydraulic system, electrical system etc., it is protecting
Under the premise of hindering safety, apply downward vertical load in arm support tail end according to program shown in Fig. 7, under cantilever crane loaded state,
Cracks generate acoustic emission signal, and acoustic emission signal is propagated in cantilever crane, and is picked up by acoustic emission sensor, the sound hair being picked
It penetrates signal to be transferred to acoustic emission detection instrument after pre-amplification and be recorded, obtains acoustic emission signal amplitude-as shown in Figure 8
Time chart.
It is of course also possible to detect the sound emission letter of cantilever crane that is, under pump concrete mode in pump truck actual working state
Number, realization is measured in real time the cantilever crane under working condition, it is ensured that the safety of work progress.
As shown in Fig. 2, step 210: to acoustic emission signal real-time perfoming frequency domain, time frequency analysis, signal characteristic is extracted, with number
It is compared according to library, determines Signal of Cracks, specifically, to the frequency such as acoustic emission signal real-time perfoming Fourier transformation, wavelet transformation
Sound emission signal characteristic is extracted in domain, time frequency analysis, then by the signal characteristic in the sound emission signal characteristic and database that extract
It is matched, so that it is determined that Signal of Cracks, obtains the waveform diagram and frequency spectrum of a certain frame Signal of Cracks as shown in Figure 9 and Figure 10
Figure.
As shown in Fig. 2, step 212: the characterization parameter of analysis statistics Signal of Cracks determines the grade of the cantilever crane crackle, sends out
Alarm out.Wherein characterization parameter can be the characterization parameters such as internal fissure signal event number per second, accumulative Ring-down count, by table
The analysis of sign parameter carries out safety evaluation to cantilever crane, and in detail, safety evaluation is according to for interior crackle event number per second and averagely
Amplitude, wherein average amplitude takes its average value and obtain by taking amplitude maximum first 5.
Wherein, security level is divided into third gear: I grades, safety level can be continued to use without reinspection；II grades, grade is paid close attention to,
It need to periodically recheck；III level, hazard class, it is necessary to stop using, be rechecked using other means.
Specifically, when internal fissure event number per second is less, such as less than 3/minute illustrate that arm support safe rank belongs to
I grades, inactive defect exists, and when internal fissure event number per second is larger, such as 3~8/minute, and Signal of Cracks is flat
When equal amplitude is greater than 60dB, illustrates that arm support safe rank is II grades, should pay close attention to, can be used, but regular reinspection should be done, when
Crackle event number per second continues to increase or the fuctuation within a narrow range in a high value, is greater than 8/minute, and average amplitude is big
When 70dB, then arm support safe rank is III level, should shut down and be rechecked using other detection means to cantilever crane.Further
The quantity of great care high-amplitude, high-energy value Signal of Cracks is answered on ground, for example, when having no less than 5 in crackle event number per second
High-amplitude, such as more than 70dB acoustic emission signal, then the security level of cantilever crane is at least III level.
Certainly, the judgment criteria of the above security level is only a preferred embodiment of this programme, can also be according to specific
Cantilever crane operating condition demand, divide other judgment criterias.
As shown in figure 8, crackle event number per minute is 2 in loading procedure, illustrate that this arm support safe rank belongs to I grades, nothing
Active defects exist.But the amplitude of 2 Signal of Cracks is each about 60dB, should also arouse attention in subsequent inspection.
The crackle monitoring device 100 that the embodiment of second aspect of the present invention provides, as shown in figure 11, comprising: processor
110；For storing the memory 120 of 110 executable instruction of processor, wherein the processor 110 is described for executing
The step of cantilever crane crack monitoring method as described in any one of the above embodiments is realized when the executable instruction stored in memory 120
Suddenly.
The crackle monitoring device 100 that the above embodiment of the present invention provides, by executing described in any of the above-described technical solution
Cantilever crane crack monitoring method, thus have all of the above beneficial effect, details are not described herein.
In conclusion being believed in a kind of cantilever crane crack monitoring method provided by the invention and crackle monitoring device by crackle
Number corresponding with Signal of Cracks security level is determined, compared with for manually visualizing and checking cantilever crane crackle, realizing to cantilever crane online in fact
Shi Jinhang detection, while the acoustic emission signal detected is analyzed in real time, its degree of danger is divided, to potential
Risk of breakage gives warning in advance, and effectively avoids accident, improves the safety of equipment, meanwhile, it is examined using acoustic emission sensor
The acoustic emission signal of test arm frame is not necessarily to artificial detection, is greatly saved the workload of staff, and compared with the inspection of visual detection
It is more accurate to survey result, acoustic emission sensor obtains acoustic emission signal in real time, and detection is efficiently and accurate, can effectively avoid missing inspection
Risk.
In the present invention, term " first ", " second ", " third " are only used for the purpose of description, and should not be understood as indicating
Or imply relative importance；Term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " installation ",
The terms such as " connected ", " connection ", " fixation " shall be understood in a broad sense, for example, " connection " may be a fixed connection, being also possible to can
Dismantling connection, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.For this
For the those of ordinary skill in field, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In description of the invention, it is to be understood that the instructions such as term " on ", "lower", "left", "right", "front", "rear"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched
It states, rather than the device or unit of indication or suggestion meaning must have specific direction, be constructed and operated in a specific orientation,
It is thus impossible to be interpreted as limitation of the present invention.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of cantilever crane crack monitoring method characterized by comprising
Detect the acoustic emission signal of cantilever crane；
Signal of Cracks corresponding with the acoustic emission signal is determined according to the acoustic emission signal；
Security level corresponding with the Signal of Cracks is determined according to the Signal of Cracks.
2. cantilever crane crack monitoring method according to claim 1, which is characterized in that in the sound emission letter of the detection cantilever crane
Number the step of before, it is further comprising the steps of:
Determine the area to be tested of the cantilever crane；
It is determined in acoustic emission sensor corresponding with the area to be tested and acoustic emission detector according to the area to be tested
Number of channels so that acoustic emission sensor detection is corresponding in the acoustic emission signal of the detection cantilever crane the step of
The acoustic emission signal of the area to be tested.
3. cantilever crane crack monitoring method according to claim 2, which is characterized in that
The area to be tested of the determination cantilever crane specifically includes:
The load distribution of the cantilever crane is detected, and determines the area to be tested of the cantilever crane according to load distribution；Or
The historical statistical data that fails with model Study of Boom Cracking is obtained, and is determined according to the historical statistical data described to be detected
Region.
4. cantilever crane crack monitoring method according to claim 2, which is characterized in that
It is described that acoustic emission sensor corresponding with the area to be tested and acoustic emission detection are determined according to the area to be tested
Number of channels in instrument specifically includes:
It to each area to be tested, determines that acoustic emission sensor described at least three is corresponding to it, and determines at least three institute
It is corresponding to it in the channel for stating acoustic emission detector.
5. cantilever crane crack monitoring method according to any one of claim 1 to 4, which is characterized in that
Among described the step of determining Signal of Cracks corresponding with the acoustic emission signal according to the acoustic emission signal, including
Following steps:
The acoustic emission signal is amplified and recorded；
Extract the signal characteristic of the amplified acoustic emission signal；
The obtained signal characteristic will be extracted to match with the signal characteristic in database, and institute is determined according to matching result
State Signal of Cracks.
6. cantilever crane crack monitoring method according to any one of claim 1 to 4, which is characterized in that
In described the step of determining security level corresponding with the Signal of Cracks according to the Signal of Cracks, including following step
It is rapid:
Extract the characteristic parameter of the Signal of Cracks；
Security level corresponding with the Signal of Cracks is determined according to the characteristic parameter of the Signal of Cracks extracted.
7. cantilever crane crack monitoring method according to claim 6, which is characterized in that
The characteristic parameter include it is per second in crackle event number and it is per second in average crack signal amplitude,
Wherein, if the crackle event number in per second is lower than 3, the arm support safe rank is I grades；
If it is per second in crackle event number be 3~8, and it is per second in average crack signal amplitude be greater than 60dB and be less than etc.
When 70dB, then the arm support safe rank is II grades；
If the crackle event number in per second is to continue to increase or be greater than 8, and interior average crack signal amplitude per second is greater than
When 70dB, then the arm support safe rank is III level.
8. cantilever crane crack monitoring method according to claim 7, which is characterized in that
If have that no less than 5 acoustic emission signals are more than 70dB in the crackle event number in per second, the safety level of the cantilever crane
It Zhi Shaowei not III level.
9. cantilever crane crack monitoring method according to any one of claim 1 to 4, which is characterized in that
It is described according to the Signal of Cracks determine security level corresponding with the Signal of Cracks the step of after, further include with
Lower step:
Alarm corresponding with the security level is issued according to the security level.
10. a kind of crackle monitoring device characterized by comprising
Processor；
For storing the memory of the processor-executable instruction, wherein the processor is for executing in the memory
The step of realizing cantilever crane crack monitoring method as claimed in any one of claims 1-9 wherein when the executable instruction of storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910704448.4A CN110398539A (en) | 2019-07-31 | 2019-07-31 | Cantilever crane crack monitoring method and crackle monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910704448.4A CN110398539A (en) | 2019-07-31 | 2019-07-31 | Cantilever crane crack monitoring method and crackle monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110398539A true CN110398539A (en) | 2019-11-01 |
Family
ID=68327064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910704448.4A Pending CN110398539A (en) | 2019-07-31 | 2019-07-31 | Cantilever crane crack monitoring method and crackle monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110398539A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021232554A1 (en) * | 2020-05-22 | 2021-11-25 | 中联重科股份有限公司 | Boom monitoring method and system, and construction machine comprising boom monitoring system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620204A (en) * | 2009-08-06 | 2010-01-06 | 中国特种设备检测研究院 | Method for detecting and evaluating sound emission of crane |
| CN102023185A (en) * | 2010-11-12 | 2011-04-20 | 中国农业大学 | Acoustic emission locating detection method for defects of crane boom |
| CN102998371A (en) * | 2012-12-17 | 2013-03-27 | 中联重科股份有限公司 | System and method for detecting defect of crane jib |
| CN108287197A (en) * | 2017-12-29 | 2018-07-17 | 北京城建北方建设有限责任公司 | The signal processing method of sound emission safety of tower crane detecting system |
-
2019
- 2019-07-31 CN CN201910704448.4A patent/CN110398539A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620204A (en) * | 2009-08-06 | 2010-01-06 | 中国特种设备检测研究院 | Method for detecting and evaluating sound emission of crane |
| CN102023185A (en) * | 2010-11-12 | 2011-04-20 | 中国农业大学 | Acoustic emission locating detection method for defects of crane boom |
| CN102998371A (en) * | 2012-12-17 | 2013-03-27 | 中联重科股份有限公司 | System and method for detecting defect of crane jib |
| CN108287197A (en) * | 2017-12-29 | 2018-07-17 | 北京城建北方建设有限责任公司 | The signal processing method of sound emission safety of tower crane detecting system |
Non-Patent Citations (5)
| Title |
|---|
| 中国航空综合技术研究所主编: "《2021年无损检测技术交流会论文集》", 31 October 2012, 国防工业出版社 * |
| 张永裕 张泽编: "《理化检验及热处理实用手册》", 31 August 2016, 国防工业出版社 * |
| 徐匡迪主编: "《中国科学技术前沿》", 31 July 2003, 高等教育出版社 * |
| 时彧主编: "《机械故障诊断技术与应用》", 30 April 2014, 国防工业出版社 * |
| 窦艳涛: "汽车起重机关键结构件损伤的声发射特性与源识别方法研究", 《中国博士学位论文全文数据库（电子期刊）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021232554A1 (en) * | 2020-05-22 | 2021-11-25 | 中联重科股份有限公司 | Boom monitoring method and system, and construction machine comprising boom monitoring system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hu et al. | A statistical algorithm for comparing mode shapes of vibration testing before and after damage in timbers | |
| CN104297342B (en) | A kind of ultrasonic detection method of engine air conduit electron beam weld | |
| EP2567224B1 (en) | Method and device for non-destructive material testing by means of ultrasound | |
| CN103995051B (en) | Testing device and testing method for recognizing weld defects of orthotropic steel bridge deck slab | |
| Long et al. | Prediction of guided wave scattering by defects in rails using numerical modelling | |
| CN110455917A (en) | A kind of repairing concrete crack quality determining method | |
| CN110398539A (en) | Cantilever crane crack monitoring method and crackle monitoring device | |
| Wuriti et al. | Acoustic emission test method for investigation of M250 maraging steel pressure vessels for aerospace applications | |
| CN107271564A (en) | Bridge crane box beam acoustic emission detection system and damage detecting method based on EAF and LAP composite strategies | |
| CN105738017B (en) | Constituent content influences the modification method of assessment metal material skin stress | |
| CN102590334B (en) | Complete set of eddy current flaw detection equipment for white vehicle body or parts | |
| CN105866247A (en) | Device and method for detecting sticking compactness of steel plate | |
| CN108205016A (en) | The industrial computer system of sound emission safety of tower crane detection | |
| CN203396752U (en) | Magnetizer probe detection system for nondestructive bridge sling anchor cable body guided wave testing | |
| CN108287197A (en) | The signal processing method of sound emission safety of tower crane detecting system | |
| Wang et al. | Discussion of the definition for acoustic emission event in the time series of concrete damage process | |
| CN207662845U (en) | A kind of scalable Multi probe portable detector based on Magnetic Memory | |
| CN105424803B (en) | A kind of Railway wheelset flaw detection processing method and processing device | |
| CN206020347U (en) | Ultrasonic examination detection reference block | |
| Gang et al. | A study on acoustic emission technology for tank bottom corrosion inspection | |
| Loi et al. | Vibro-Acoustic Modulation with broadband pump excitation for efficient impact damage detection in composite materials | |
| CN207774644U (en) | Safety of tower crane detection device | |
| CN207703792U (en) | Sound emission safety of tower crane detecting system | |
| Underhill et al. | Probability of detection for bolt hole eddy current in extracted from service aircraft wing structures | |
| Xu et al. | Detection of impulsive signals on tendons for hybrid wind turbines using acoustic emission measurements |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191101 |