CN109655880A - A kind of detection method of large cylindrical structure movement fifth wheel - Google Patents
A kind of detection method of large cylindrical structure movement fifth wheel Download PDFInfo
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Abstract
一种大型圆柱结构活动多余物的检测方法，在电机驱动转动的大型圆柱结构上设置有无线数据采集装置和声发射传感器构成的无线信号采集系统，无线信号采集系统与PC机连接进行数据及指令的传输；通过控制柜控制电机旋转，进而带动大型圆柱结构转动，同时无线信号采集系统通过无线传输方式将声发射传感器采集到的数据发送到PC机上，经安装在PC机上的算法分析，计算信号的得分，即可判定是否存在多余物以及多余物的类型；本发明首先能够实现大型圆柱结构的旋转；其次能够通过无线传输，实现被测物体旋转过程中活动多余物的检测；同时，实现活动多余物的判断及定位，检测精度和检测效率得到提高，检测对象增大。
A method for detecting excess activity in a large cylindrical structure. A wireless signal acquisition system composed of a wireless data acquisition device and an acoustic emission sensor is arranged on the large cylindrical structure driven and rotated by a motor, and the wireless signal acquisition system is connected with a PC to carry out data and instructions. Through the control cabinet to control the rotation of the motor, and then drive the rotation of the large cylindrical structure, at the same time, the wireless signal acquisition system sends the data collected by the acoustic emission sensor to the PC through wireless transmission, and the algorithm is installed on the PC. If the score is obtained, it can be determined whether there is any excess and the type of the excess; the invention can firstly realize the rotation of the large cylindrical structure; secondly, it can realize the detection of the moving excess during the rotation of the measured object through wireless transmission; Judgment and positioning of redundant objects, detection accuracy and detection efficiency are improved, and detection objects are enlarged.
Description
Technical field
The present invention relates to fifth wheel detection technique field, in particular to a kind of detection of large cylindrical structure movement fifth wheel
Method.
Background technique
Fifth wheel refers to present in product by external all unrelated with product specified states entered or inside generates
Substance.It may cause product and loses its defined function, cause product failure, be puzzlement aerospace equipment reliability
A great problem.In March, 1993, when in the U.S., Kennedy Space Center carries out shuttle Columbia pre-flight preparation,
It was found that solid booster rocket fuel losses, have found the hairline being mixed into an O-ring seals after dismantling rocket sub-assembly.
2000~2007, it is total that the fifth wheel problematic amount that total Physical Culture Institute, China occurs during certain Project R&D accounts for annual problem
The average annual percentage of quantity is 9.2%, these fifth wheel problems cause the flight test progress of the model to be affected.
With the development of China's aerospace field, fifth wheel problem is also more and more paid close attention to.Such as Chinese patent
CN102435672A " a kind of monitor station and avionics equipment fifth wheel automatic detection device and detection using this monitor station
Method " drive the electronic equipment placed on the table to swing using crank and rocker mechanism, fifth wheel is mobile in swing process produces
Raw sound and vibration is acquired by sensor, is transmitted to host computer and is analyzed and determined.Chinese patent CN103472196A " one
Kind fifth wheel detection device " it is rotated using detection device drive product around two axial lines, be by being listened in product in quiet room
It is no to make a sound and observe whether interiors of products has fifth wheel movement to determine whether there is the generation of fifth wheel.
Above-mentioned patent greatly improves the efficiency of extra analyte detection, improves the reliability of space product, but it is only capable of
The fifth wheel test problems for solving small-sized space product, for aerospace field, largely existing large cylindrical structure (is such as store
Case, shell section) extra analyte detection is helpless.China's analyte detection research extra for large cylindrical structure is also fewer.Such as standard
QJ2850A-2011 " space product fifth wheel prevention and control " mainly by the process of Specification Design, processing, assembling stage come
Remaining fifth wheel is reduced, given extra object detecting method includes the methods of ocular examination, sense of hearing inspection technique, these sides
Method detection efficiency is low, low precision.A kind of Chinese patent CN102955178A " detection method and dress of fifth wheel in spacecraft module body
Set " spacecraft cabin being fixed in cantilever design is shaken by handle, using observation and listens to method judgement and check space flight
Whether there is fifth wheel in device cabin, the disadvantage is that the reliability of cantilever design is lower, observation and listening method are by people's subjective factor
It is affected, detection accuracy is low.A kind of Chinese patent CN201555700U " detection dress of closed cylindrical structure active redundant articles
Set " realize the detections of closed cylindrical structure active redundant articles, but the disadvantage is that flange guide rail connecting rod need to be rotated manually, in case of
Detection efficiency is low when large cylindrical structure, and PZT (piezoelectric transducer) stability is poor.
Summary of the invention
In view of the above problems, the purpose of the present invention is to provide a kind of inspections of large cylindrical structure movement fifth wheel
Survey method can judge large cylindrical structure with the presence or absence of active redundant articles with precise and high efficiency.
In order to achieve the above object, the technical scheme of the present invention is realized as follows:
A kind of detection method of large cylindrical structure movement fifth wheel, comprising the following steps:
Step 1: first by 4 clamping of rolling ring 7 surface of large cylindrical structure lean on close end position, make rolling ring 4 with
7 surface of large cylindrical structure is without relative motion；Rolling ring 4, which is placed in unwheeling 6, again enables large cylindrical structure 7 around certainly
Body axis rotation；The rotation axis connection motor 8 of unwheeling 6,8 signal of motor are drivingly connected control cabinet 9；Then data line is utilized
2 connect the wireless data acquisition device 3 being arranged in large cylindrical structure 7 and acoustic emission sensor 1, form wireless communication
Number acquisition system；Finally wireless signal acquiring system is connect by way of wireless data transmission with PC machine 5 carry out data and
The transmission of instruction；
Wireless signal acquiring system parameter is set and is sent to wirelessly by wireless transmission method Step 2: opening PC machine 5
Data acquisition device 3；Then 9 power supply of control cabinet is connected, motor 8 is controlled by control cabinet 9 and is rotated, and then drives 4 He of rolling ring
Large cylindrical structure 7 rotates, while wireless data acquisition device 3 is collected acoustic emission sensor 1 by wireless transmission method
Data be sent in PC machine 5, the analysis of algorithm through being mounted in PC machine 5 when not having active redundant articles generation, is carried out continuously
Data acquisition, acquisition time exceeds schedule time, and thinks that large cylindrical structure does not have active redundant articles, when there is active redundant articles
When generation, PC machine 5, which issues, alarms and shows active redundant articles position, closes motor 8 at this time, extra by personnel's carry out activity
The pickup of object, pickup, which finishes, continues active redundant articles detection.
The large cylindrical structure 7 is connected by multistage and is combined, and when multistage combines, must all arrange that sound emission passes on every section
Sensor 1.
The acoustic emission sensor 1 and wireless data acquisition device 3 is arranged in large cylindrical structure 7, large cylindrical
Acoustic emission sensor 1 is separated by 180 ° of installations, adjacent acoustic emission sensor 1 in the axial direction of large cylindrical structure 7 in the circumferential direction of structure 7
It is separated by 90 ° of installations.
Algorithm analysis in PC machine 5 described in step 2, specifically: signal data received by calculating PC machine 5 first
Characteristic value, comprising: shock, event count, Ring-down count, energy counting, amplitude, the duration, the rise time, virtual value electricity
Pressure, average signal level etc.；Then the score score of each single item characteristic value is calculatedi, in which: scorei=Ei/ETi, EiIndicate special
The value of value indicative i, ETiIndicate threshold value corresponding to characteristic value i；Then calculate each sensor collected signal data
Total score Score, in which:The number of n expression characteristic value；Finally compare sensor to be adopted
The total score Score and total score threshold value Score of the signal data collectedTIf Score > ScoreT, then determine large-scale circle
There are fifth wheels in rod structure 7, issue alarm；If Score < ScoreT, then determine that there is no more in large cylindrical structure 7
Excess；When there is active redundant articles generation, it is extra that the maximum three sensors composition sensor group of algorithms selection total score carries out
The positioning of object.
Advantages of the present invention are as follows:
1, algorithm analysis, each independent characteristic value is merged, reduce list by score calculation formula
Rate of false alarm when one characteristic value judges, simultaneously as different (some characteristic values of the characteristic for the fifth wheel that each characteristic value can reflect
Can reflect fifth wheel size, some characteristic values can react extra species), the fusion through score calculation formula is finally obtained
Total score includes all characteristics that each characteristic value is included, and is a comprehensive index.
2, the present invention can be realized the rotation of large cylindrical structure first；Secondly, can be realized tested by wireless transmission
The detection of active redundant articles in object rotary course；It can be realized comprehensive, comprehensive, accurately inspection by introducing algorithm analysis simultaneously
Survey the size and type of fifth wheel；The final positioning for realizing active redundant articles.
Detailed description of the invention
Fig. 1 is equipment scheme of installation used in the embodiment of the present invention one.
Fig. 2 is detection method flow chart.
Fig. 3 is mounted in the diagnostic process of the algorithm in PC machine 5.
Fig. 4 is equipment scheme of installation used in the embodiment of the present invention two.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment one
A kind of detection method of large cylindrical structure movement fifth wheel, comprising the following steps:
Step 1: referring to Fig.1,4 clamping of rolling ring being leaned on the position of close end on 7 surface of large cylindrical structure first, is made
Rolling ring 4 and 7 surface of large cylindrical structure are without relative motion；Rolling ring 4 is placed in unwheeling 6 again, makes large cylindrical structure 7
It can be around own axis；The rotation axis connection motor 8 of unwheeling 6,8 signal of motor are drivingly connected control cabinet 9；Then number is utilized
Wireless data acquisition device 3 and acoustic emission sensor 1 are connected according to transmission line 2, form wireless signal acquiring system；Sound hair
It penetrates sensor 1 and wireless data acquisition device 3 is arranged in large cylindrical structure 7, sound emission in the circumferential direction of large cylindrical structure 7
Sensor 1 is separated by 180 ° of installations, and adjacent acoustic emission sensor 1 is separated by 90 ° of installations in the circumferential direction of large cylindrical structure 7；Last nothing
Line signal acquiring system connect the transmission for carrying out data and instruction by way of wireless data transmission with PC machine 5；
Step 2: opening PC machine 5 referring to Fig. 2 and wireless signal acquiring system parameter being arranged and is sent out by wireless transmission method
Give wireless data acquisition device 3；Then the power supply for connecting control cabinet 9 controls motor 8 by control cabinet 9 and rotates, and then drives
Rolling ring 4 and large cylindrical structure 7 rotate, while wireless data acquisition device 3 passes through wireless transmission method for voice sending sensor
The collected data of device 1 are sent in PC machine 5, and the algorithm analysis through being mounted in PC machine 5, analysis process is as shown in figure 3, first
Calculate the characteristic value of signal data received by PC machine 5, comprising: shock, event count, Ring-down count, energy counting, width
Degree, duration, rise time, RMS voltage, average signal level etc.；Then the score of each single item characteristic value is calculated
scorei, in which: scorei=Ei/ETi, EiIndicate the value of characteristic value i, ETiIndicate threshold value corresponding to characteristic value i；Then it calculates
Each sensor collected signal data total score Score, in which:N is indicated
The number of characteristic value；Finally compare sensor collected signal data total score Score and total score threshold value ScoreT,
If Score > ScoreT, then determine that there are fifth wheels in large cylindrical structure 7, issue and alarm and select total score maximum
Three sensor composition sensor groups carry out the positioning of fifth wheel.；If Score < ScoreT, then determine large cylindrical structure 7
It is interior that fifth wheel is not present.
When not having active redundant articles generation, it is carried out continuously data acquisition, acquisition time exceeds schedule time, and thinks big
Type cylindrical structure does not have active redundant articles, and when there is active redundant articles generation, PC machine 5, which issues, alarms and show active redundant articles
Motor is closed in position at this time, and the pickup of active redundant articles is carried out by personnel, and pickup, which finishes, continues active redundant articles inspection
It surveys.
Embodiment two
A kind of detection method of large cylindrical structure movement fifth wheel, comprising the following steps:
Step 1: 4 clamping of rolling ring is leaned on the position of close end on 7 surface of large cylindrical structure first, is made referring to Fig. 4
Rolling ring 4 and 7 surface of large cylindrical structure are without relative motion；Rolling ring 4 is placed on the upper of unwheeling 6 again, makes large cylindrical knot
Structure 7 can be around own axis；The rotation axis connection motor 8 of unwheeling 6,8 signal of motor are drivingly connected control cabinet 9；Then sharp
Wireless data acquisition device 3 is connected with setting in acoustic emission sensor 1 with data line 2, composition wireless signal is adopted
Collecting system；Acoustic emission sensor 7 and wireless data acquisition device 3 are fixed in large cylindrical structure 7, large cylindrical structure 7
Acoustic emission sensor 1 is separated by 180 ° of installations in circumferential direction, and adjacent acoustic emission sensor 1 is separated by the circumferential direction of large cylindrical structure 7
90 ° of installations；Referring to Fig. 4, since large cylindrical structure 7 is riveted by multistage, arrangement position is determined according to riveting location, by riveting
Acoustic emission sensor must be arranged (on i.e. every section) on two structural members connect；The advantage that this kind arrangement requires is: can guarantee
Large cylindrical structure 7 realizes comprehensive signal acquisition, guarantees the reliability of extra analyte detection.Last wireless signal acquiring system
The transmission for carrying out data and instruction is connect with PC machine 5 by way of wireless data transmission；
Step 2: opening PC machine 5 referring to Fig. 2 and wireless signal acquiring system parameter being arranged and is sent out by wireless transmission method
Give wireless data acquisition device 3；Then 9 power supply of control cabinet is connected, motor 8 is controlled by control cabinet 9 and is rotated, and then drives rolling
Rotating ring 4 and large cylindrical structure 7 rotate, while wireless data acquisition device 3 passes through wireless transmission method for acoustic emission sensor 1
Collected data are sent in PC machine 5, and the algorithm analysis through being mounted in PC machine 5, analysis process is not as shown in figure 3, when having
When active redundant articles generate, it is carried out continuously data acquisition, acquisition time exceeds schedule time, and thinks that large cylindrical structure does not have
Active redundant articles, when there is active redundant articles generation, PC machine 5, which issues, alarms and selects the maximum three sensors composition of total score
Sensor group carries out the positioning of fifth wheel, closes motor at this time, and the pickup of active redundant articles is carried out by personnel, and pickup finishes continuation
Carry out active redundant articles detection.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Any modifications, equivalent replacements, and improvements etc. done within mind and principle, should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of detection method of large cylindrical structure movement fifth wheel, which comprises the following steps:
Step 1: rolling ring (4) clamping is leaned on the position of close end on large cylindrical structure (7) surface first, make rolling ring (4)
With large cylindrical structure (7) surface without relative motion；Rolling ring (4), which is placed on unwheeling (6), again makes large cylindrical structure (7)
It can be around own axis；The rotation axis connection motor (8) of unwheeling (6), motor (8) signal are drivingly connected control cabinet (9)；So
Wireless data acquisition device (3) and voice sending sensor on large cylindrical structure (7) will be arranged in using data line (2) afterwards
Device (1) connects, and forms wireless signal acquiring system；The side that wireless signal acquiring system is finally passed through into wireless data transmission
Formula connect the transmission for carrying out data and instruction with PC machine (5)；
Step 2: opening PC machine (5), wireless signal acquiring system parameter is arranged and being sent to no line number by wireless transmission method
According to acquisition device (3)；Then control cabinet (9) power supply is connected, by control cabinet (9) control motor (8) rotation, and then drives and rolls
Ring (4) and large cylindrical structure (7) rotation, while wireless data acquisition device (3) is passed sound emission by wireless transmission method
Sensor (1) collected data are sent on PC machine (5), the algorithm analysis being mounted on PC machine (5), movable extra when not having
When object generates, it is carried out continuously data acquisition, acquisition time exceeds schedule time, and thinks that large cylindrical structure is extra without activity
Object, when there is active redundant articles generation, PC machine (5), which issues, alarms and shows active redundant articles position, closes motor at this time
(8), the pickup of active redundant articles is carried out by personnel, pickup, which finishes, continues active redundant articles detection.
2. a kind of detection method of large cylindrical structure movement fifth wheel according to claim 1, which is characterized in that described
Large cylindrical structure (7) connected and combine by multistage, must all arrange acoustic emission sensor (1) when multistage combines, on every section.
3. a kind of detection method of large cylindrical structure movement fifth wheel according to claim 1, which is characterized in that described
Acoustic emission sensor (1) and wireless data acquisition device (3) be arranged on large cylindrical structure (7), large cylindrical structure (7)
Circumferential direction on acoustic emission sensor (1) be separated by 180 ° of installations, adjacent acoustic emission sensor in the axial direction of large cylindrical structure (7)
(1) it is separated by 90 ° of installations.
4. a kind of detection method of large cylindrical structure movement fifth wheel according to claim 1, which is characterized in that step
Algorithm analysis in PC machine described in two (5), specifically: the characteristic value of signal data received by calculating PC machine (5) first,
It include: shock, event count, Ring-down count, energy counting, amplitude, duration, rise time, RMS voltage, average letter
Number level；Then the score score of each single item characteristic value is calculatedi, in which: scorei=Ei/ETi, EiIndicate the value of characteristic value i,
ETiIndicate threshold value corresponding to characteristic value i；Then calculate each sensor collected signal data total score
Score, in which:The number of n expression characteristic value；It is collected finally to compare sensor institute
The total score Score and total score threshold value Score of signal dataTIf Score > ScoreT, then determine large cylindrical structure
(7) there are fifth wheels in, issue alarm；If Score < ScoreT, then determine that there is no extra in large cylindrical structure (7)
Object；When there is active redundant articles generation, the maximum three sensors composition sensor group of algorithms selection total score carries out fifth wheel
Positioning.
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Application publication date: 20190419 |