CN104181200A - Thermal image detection method for damage of spatial structure - Google Patents
Thermal image detection method for damage of spatial structure Download PDFInfo
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- CN104181200A CN104181200A CN201410437100.0A CN201410437100A CN104181200A CN 104181200 A CN104181200 A CN 104181200A CN 201410437100 A CN201410437100 A CN 201410437100A CN 104181200 A CN104181200 A CN 104181200A
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Abstract
The invention discloses a thermal image detection method for damage of a spatial structure. The thermal image detection method comprises the following steps: selecting an intact structure which is the same as a to-be-detected spatial structure in a vacuum cold dark environment, and applying a variable heat flow to the intact structure, wherein the heat flow rate changes linearly along with time; recording a temperature field change image and temperature data within a heat flow change time period by adopting a thermal imaging instrument; applying another same heat flow which changes along with the time to the to-be-detected spatial structure, and recording a temperature change image and data of the to-be-detected spatial structure; and calculating the probability of the damage in the spatial structure after two groups of temperature field change data are obtained. According to the method disclosed by the invention, whether the damage exists in the spatial structure can be detected quickly and effectively so that the support can be provided for further confirming the situation of the damage; and therefore, the reliability of a spacecraft can be effectively improved.
Description
Technical field
The invention belongs to the technical field of nondestructive testing of space structure damage.Method of the present invention is applicable to the space structures such as the compound substance, sun wing cell panel of antenna reflection panel, shuttle vehicle wing etc.
Background technology
At present, along with the development of spationautics, space structure adopts increasing compound substance, the compound substance of space structure is generally comprised of sandwich construction, endo conformation is comparatively complicated, and damage is many to be occurred by inside, is difficult to find by artificial under the general environment of ground.If the space structure transmitting with internal injury is entered the orbit, under the impact of spatial complex rugged surroundings, will further develop and worsen, when serious, by causing the disabler of space structure, even cause the failure of whole spacecraft task.Whether therefore, by effective method, detect space structure exists defect to have very important realistic meaning.
Existing lossless detection method mainly contains two kinds of UT (Ultrasonic Testing) and x radiographic inspections.For this inner complicated structure of space structure, make the calculating of ultrasound wave and x radiographic inspection become very complicated, judge whether structure occurs that abnormal difficulty increases greatly.The main method by environmental stress screening increases the suffered environmental stress intensity of space structure now, makes internal injury be exposed to early the degree that manually can find, then makes corresponding innovative approach, improves spacecraft reliability.But, increase environmental stress and can cause the overtesting problem of intact structure to expose ahead of time the method for defect, reduce the serviceable life of space structure.In addition, for the space structure that can reuse in shuttle vehicle, the feasibility of this detection method is lower.Therefore,, in order to improve space structure reliability, must realize the Non-Destructive Testing to space structure.
Summary of the invention
Goal of the invention of the present invention is to provide a kind of fast and effeciently detection space inside configuration whether to have the detection method of damage, thereby for further confirming that degree of impairment provides support, effectively improves the reliability of spacecraft.
To achieve these goals, the present invention has adopted following technical scheme:
A damage thermal imagery detection method for space structure, comprises the following steps:
1) under the cold darkness environment of vacuum, select an intact structure identical with space structure to be detected, one side is applied to a variable heat flux, hot-fluid size is linear change in time, and minimum value and maximal value are respectively 0 and 10 solar constant;
2), along with the applying of variable heat flux, adopt thermal imaging system to record modified-image and the temperature data in the temperature field of this intact structure in the additional changes of heat flux time period;
3) treat detection space structure and apply same time dependent hot-fluid, adopt thermal imaging system to record temperature variation image and the data of space structure to be detected; After obtaining two groups of change of temperature field data, by thermal imagery nondestructive determination, calculate the inner probability size that has damage of space structure, and provide position and the magnitude range of damage.
Wherein, variable heat flux applies by infrared hot plate, heat lamp and LASER HEATING mode.
Wherein, in the situation that can contrast without standard component (i.e. the intact structure identical with space structure to be detected), adopt the intact structure of calculating temperature fields under hot-fluid outside applied transient state such as Numerical Temperature software for calculation ANSYS, SINDA/FLUINT, UG, adopt thermal imagery nondestructive determination compare of analysis damage position and size.
The present invention compared with prior art, has the following advantages: whether the method fast and effeciently detection space inside configuration exists damage, thereby for further confirming that degree of impairment provides support, effectively improves the reliability of spacecraft.
Accompanying drawing explanation
Fig. 1 is the system schematic of the thermal imagery detection method of space structure of the present invention;
Embodiment
Below in conjunction with accompanying drawing, the lossless detection method implementation system of space structure of the present invention is further described.
Referring to Fig. 1, Fig. 1 is for implementing the system schematic of space structure thermal imagery detection method of the present invention, wherein, in this system, for this thermal imagery detection space structure of design, transient state heating and thermal imaging temperature measurement with to be measured (space structure to be detected) to standard component (i.e. the intact structure identical with space structure to be detected) have been realized.First select an intact structure identical with space structure to be detected, in space structure one side, apply a variable heat flux, hot-fluid size is linear change in time, and minimum value and maximal value are respectively 0 and 10 solar constant, the coefficient of heat conductivity of structured material is larger, and outer changes of heat flux speed is larger; Type of heating adopts three kinds of modes: infrared hot plate, heat lamp and LASER HEATING.
Adopt thermal imaging system to record modified-image and the temperature data in temperature field in the additional changes of heat flux time period simultaneously.Thermal imaging system is over against reference material surface, and operation thermal imaging system records surface temperature distribution data to be measured.Then treat detection piece and apply same time dependent hot-fluid, adopt thermal imaging system to record to be measured temperature variation image and data; After obtaining two groups of change of temperature field data, by thermal imagery Nondestructive Detection method (routine software for calculation described above), calculate the inner probability size that has damage of space structure, and provide position and the magnitude range of damage.Calculate and innerly to exist the method for damage probability to divide following step: a) calculate the temperature contrast between standard component and to be measured.
Thermal imagery Nondestructive Detection method is carried out degree of impairment judgement according to standard component and the measured piece same position place time dependent difference size of temperature.Certain moment same point temperature difference is:
ΔT(x，y，t)＝T(x，y，t)-Ts(x，y，t)
First under point by point scanning (x, y, t) coordinate, Δ T surpasses the point (x1, y1) of limits value Δ Tc, then scan its point around, if put Δ T (x, y, t) around, be all greater than limits value Δ Tc, continue scanning, until T (x, y, t) is less than limits value.Then calculate the area S (n, t) in this region.B) contrast with critical area according to S (n, t), judges whether this region exists damage.If S (n, t) is greater than critical area, thinks and damage.C), according to Δ Tc * S (n, t)=B, there is the probability of damage in judgement (x1, y1) region.The probability calculation that (x1, y1) damage occurs is: P=Min (B/1K*cm
2, 1).
In the situation that can contrast without standard component, adopt temperature field software for calculation to calculate intact to be measured the temperature field under hot-fluid outside applied transient state, adopt thermal imagery Nondestructive Detection software compare of analysis damage position and size.
After providing damage position and size, by manual method or other method, further confirm degree of impairment.
Although above the specific embodiment of the present invention is described in detail and is illustrated, but what should indicate is, we can make various changes and modifications above-mentioned embodiment, but these do not depart from the scope that spirit of the present invention and appended claim are recorded.
Claims (3)
1. a damage thermal imagery detection method for space structure, comprises the following steps:
1) under the cold darkness environment of vacuum, select an intact structure identical with space structure to be detected, one side is applied to a variable heat flux, hot-fluid size is linear change in time, and minimum value and maximal value are respectively 0 and 10 solar constant;
2), along with the applying of variable heat flux, adopt thermal imaging system to record modified-image and the temperature data in the temperature field of this intact structure in the additional changes of heat flux time period;
3) treat detection space structure and apply same time dependent hot-fluid, adopt thermal imaging system to record temperature variation image and the data of space structure to be detected; After obtaining two groups of change of temperature field data, by thermal imagery nondestructive determination, calculate the inner probability size that has damage of space structure, and provide position and the magnitude range of damage.
2. damage thermal imagery detection method as claimed in claim 1, wherein, variable heat flux applies by infrared hot plate, heat lamp and LASER HEATING mode.
3. damage thermal imagery detection method as claimed in claim 1, wherein, in the situation that can contrast without standard component (i.e. the intact structure identical with space structure to be detected), adopt Numerical Temperature software for calculation ANSYS, SINDA/FLUINT, UG to calculate intact structure temperature field under hot-fluid outside applied transient state, adopt thermal imagery nondestructive determination compare of analysis damage position and size.
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| CN201410437100.0A CN104181200B (en) | 2014-08-29 | 2014-08-29 | The damage thermal image detection method of space structure |
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Cited By (7)
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| CN106290471A (en) * | 2016-09-30 | 2017-01-04 | 杭州公科路桥技术有限公司 | System and method for Non-Destructive Testing bridge concrete fault of construction |
| CN106324037A (en) * | 2016-09-30 | 2017-01-11 | 杭州公科路桥技术有限公司 | System and method for nondestructive examination of bridge concrete structure defects |
| CN106643486A (en) * | 2016-10-26 | 2017-05-10 | 王琪 | Cable aging position detection device based on temperature transfer law |
| CN106645288A (en) * | 2016-09-30 | 2017-05-10 | 交通运输部公路科学研究所 | Nondestructive test system for defects of bridge concrete structure and test method thereof |
| CN109655483A (en) * | 2018-12-14 | 2019-04-19 | 四川大学 | A kind of material microstructure defect inspection method based on deep learning algorithm |
| CN112731555A (en) * | 2021-01-29 | 2021-04-30 | 上海化学工业区公共管廊有限公司 | Method for detecting accumulated water of closed steel column |
| CN117470845A (en) * | 2023-11-10 | 2024-01-30 | 甘肃电力科学研究院技术中心有限公司 | Metal part plating layer identification method and method for identifying retreaded insulator |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5376793A (en) * | 1993-09-15 | 1994-12-27 | Stress Photonics, Inc. | Forced-diffusion thermal imaging apparatus and method |
| CN1069408C (en) * | 1997-02-25 | 2001-08-08 | 中国科学院金属研究所 | Non-destructive thermal image detection method for pressure container |
| US6000844A (en) * | 1997-03-04 | 1999-12-14 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Method and apparatus for the portable identification of material thickness and defects using spatially controlled heat application |
| AU2002340508A1 (en) * | 2002-09-26 | 2004-04-19 | Siemens Aktiengesellschaft | Method and apparatus for monitoring a technical installation, especially for carrying out diagnosis |
| CN102155931B (en) * | 2010-12-02 | 2012-09-05 | 西安交通大学 | Sub-surface damage detection method based on temperature field finite element analysis and simulation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106290471A (en) * | 2016-09-30 | 2017-01-04 | 杭州公科路桥技术有限公司 | System and method for Non-Destructive Testing bridge concrete fault of construction |
| CN106324037A (en) * | 2016-09-30 | 2017-01-11 | 杭州公科路桥技术有限公司 | System and method for nondestructive examination of bridge concrete structure defects |
| CN106645288A (en) * | 2016-09-30 | 2017-05-10 | 交通运输部公路科学研究所 | Nondestructive test system for defects of bridge concrete structure and test method thereof |
| CN106643486A (en) * | 2016-10-26 | 2017-05-10 | 王琪 | Cable aging position detection device based on temperature transfer law |
| CN106643486B (en) * | 2016-10-26 | 2019-06-14 | 盐池县惠泽农机作业有限公司 | A kind of cable aging position detecting device based on temperature transfer law |
| CN109655483A (en) * | 2018-12-14 | 2019-04-19 | 四川大学 | A kind of material microstructure defect inspection method based on deep learning algorithm |
| CN112731555A (en) * | 2021-01-29 | 2021-04-30 | 上海化学工业区公共管廊有限公司 | Method for detecting accumulated water of closed steel column |
| CN117470845A (en) * | 2023-11-10 | 2024-01-30 | 甘肃电力科学研究院技术中心有限公司 | Metal part plating layer identification method and method for identifying retreaded insulator |
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