CN103175846A - Infrared thermal wave imaging system for thermally exciting by utilizing solar energy - Google Patents
Infrared thermal wave imaging system for thermally exciting by utilizing solar energy Download PDFInfo
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- CN103175846A CN103175846A CN2013100865971A CN201310086597A CN103175846A CN 103175846 A CN103175846 A CN 103175846A CN 2013100865971 A CN2013100865971 A CN 2013100865971A CN 201310086597 A CN201310086597 A CN 201310086597A CN 103175846 A CN103175846 A CN 103175846A
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Abstract
The invention relates to an infrared thermal wave imaging online nondestructive testing system for thermally exciting by utilizing solar energy and is used for solving the problem that the outdoor thermal exciting power is insufficient. The system comprises an infrared thermal imager, a solar energy focusing system, a control system and a data processor. The system has a function of automatically tracking the movement of the sun and is specifically suitable for infrared thermal wave nondestructive testing of internal defects and structures of large outdoor objects.
Description
Technical field
The present invention relates to a kind of infrared thermal wave imaging nondestructive detection system with thermal excitation, adopt sun power as the thermal excitation source, be particularly suitable for the heat wave Non-Destructive Testing of outdoor object.The technical field that belongs to Infrared Non-destructive Testing.
Background technology
Infrared thermal wave imaging technique with thermal excitation is in development in recent years a kind of Novel lossless detection method rapidly, be characterized in noncontact at a distance, large tracts of land fast detecting, thereby be particularly suitable for online, in-service detection, for the various material internal hidden danger of timely discovery, reduce or avoid the generation of major accident, have important using value.
Thermal wave imaging Non-Destructive Testing ultimate principle is to adopt the thermal excitation source to project on testee, and detected zone is heated, and makes its temperature apparently higher than environment temperature, and this temperature difference can cause the heat conduction, and heat energy is conducted to interior of articles from the surface.If the thermal characteristic of interior of articles has heterogeneity, such as defectives such as fracture or spaces, will have influence on hot flow path and propagate, just the surface temperature distribution of testee can be subject to corresponding impact.Utilize infrared video camera to receive from the heat radiation that is heated the zone, can learn over time inner structure and the defective of testee by analyzing the testee infrared image.
Thermal excitation infrared thermal wave imaging technique has been used in the Non-Destructive Testing of various materials effectively.Compare traditional nondestructiving detecting means, such as ultrasound wave, eddy current, the technology such as X ray, thermal excitation infrared thermal wave imaging technique has unique advantage.And this technology is especially very effective to the detection of compound substance.The utilization of compound substance has become one of advanced important symbol of modern aerospace field equipment.Along with the application at positions such as fuselage, wing, turbo blade, storepipe, aeromotor jet pipe, turbo blade and airframe structures of various particulate metal materials and compound substance, the requirement of Non-Destructive Testing is progressively increased.Use also at Fast Growth at the compound substance of new energy field equally, mainly all made by glass fibre potting resin material at present as the blade of aerogenerator.Usually compound substance is mode or the honeycomb sandwich construction that adopts the multi-layer fiber gummed, has high strength and lightweight advantage.Owing to often can produce inherent vice in the process of making and using, as layering, unsticking, crack etc., greatly affected intensity and the serviceable life of material.Although the Non-Destructive Testing to compound substance can be adopted traditional Ultrasonic Flaw Defect, this technical requirement probe contact testee, point by point scanning is wasted time and energy.For baroque material, as cellular sheet material, the detection of ultrasonic technology is very difficult.
The demand of a lot of Non-Destructive Testings is out of doors, as the blade of aerogenerator, and radome, buildings comprises aircraft etc. very entirely.These objects are all very huge, for thermal excitation infrared thermal wave imaging technique, in order to arrive higher detection speed, need to use very large thermal excitation power.Take blade of wind-driven generator as example, its area is very large, and length can reach five, 60 meters, and width can be more than two meters.And blade material is the about glass fiber compound material of two, 30 millimeters thick, temperature conductivity is very low, in the time of thermal wave imaging, thermal excitation and image acquisition cycle are very long, in order to reach certain detection speed, system must can carry out the large tracts of land imaging, therefore thermal excitation power is at least at thousands of watts even more than tens thousand of watts, and these thermal excitations sources should be to be projected onto larger distance.Although laser instrument is optimal selection, because it is particularly suitable for heating at a distance.Even but the price of the high power laser of multikilowatt is also very expensive, and accurate optical system can not be born and jolted, require high to environment temperature, its power consumption is large simultaneously, need a large amount of chilled waters, be not suitable for operation in the open air, these problems have seriously limited its practical application out of doors.
Summary of the invention
Purpose of the present invention is exactly the deficiency for above-mentioned heat wave Dynamic Non-Destruction Measurement, and a kind of thermal wave imaging nondestructive detection system that is suitable for outdoor application is provided.It adopts the technology of focused solar energy, has effectively solved the problem of high-power thermal excitation source deficiency in the prior art.It is large that its system has power, and stable performance is with low cost, is easy to the advantages such as transportation, is particularly suitable for field work.
According to technical scheme provided by the invention, its system comprises infrared thermography, data collection and control system, thermal excitation source.Described infrared video camera is used for gathering the heat wave image of testee, and the sensitive band of its detection is usually at the 2-12 micrometer range; Described data collection and control system is used for the heat wave image is processed, and controls the operation of whole system; Described thermal excitation source is comprised of a plurality of large-area catoptrons, is used for solar light focusing and projects the testee surface.Although catoptron can adopt the arc shape that can focus on, restricted to the distance of testee like this, require near focal length.This has limited a lot of application scenarios, so level crossing is better selection.Each catoptron has mechanical control system independently to control the angle of minute surface, forms an array mirror system, makes the energy of the sun to be brought together, and significantly increases the heat energy of unit area.Every square metre of the sun power of earth surface is probably 1000 watts of left and right, if adopt the mirror of 1 square metre of area to form the array of a 4x4, the energy that can gather can reach 16000 watts of left and right.And sunshine collimates substantially, as long as minute surface is smooth, reflected light can project far place.Only have single wavelength with respect to laser instrument in addition, sunshine has broadband spectral, from ultraviolet to infrared, thereby to the testee of various optical characteristics, absorption preferably can be arranged.
A little application scenarios are needed long heat time heating time, and described solar heat excitation system has the function of automatic tracking position of sun, is radiated on the fixed position of testee to keep sunshine always.Automatic tracking system can be installed a two-dimensional adjusting device on each mirror support, namely can deflection at both direction.The advantage of this arrangement is that the adjustment System of all catoptrons is all unified design, and each regulating system only need be rotated a catoptron, loads low, is easy to control.Another method is that an one dimension adjusting gear is installed on each mirror support, is used for adjusting the overlapping distance of hot spot, the i.e. position of focus.Whole reflection mirror array is done the as a whole tracking of carrying out the sun.The adjusting of this integral body need to be at both direction.The advantage of design is following the tracks of the solar time like this, only has an adjusting mechanism to need to control, and the hot spot repeatability is constant, and the load of certain required adjustment is much bigger.Certainly the movement of the sun is very slow, and the driving power that needs needn't be very high.
Description of drawings
Fig. 1 is traditional thermal excitation infrared thermal wave imaging nondestructive detection system schematic diagram, adopts laser as the thermal excitation source.
Fig. 2 is thermal wave imaging nondestructive detection system schematic diagram of the present invention, adopts the solar heat energisation mode.
Fig. 3 is a kind of example of the array plane mirror combination for focused solar energy.
Fig. 4 is one embodiment of the present invention schematic diagram, and each catoptron of catoptron matrix has independently two-dimensional adjustment mechanism.
Fig. 5 is one embodiment of the present invention schematic diagram, and the catoptron matrix can two-dimensional adjustment, and each catoptron has independently one dimension governor motion.
Fig. 6 is one embodiment of the present invention schematic diagram, has the function of automatic tracking position of sun.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
Shown in Figure 1 is the thermal excitation infrared thermal wave imaging nondestructive detection system of a routine, the light beam of driving source 44 emissions heats and the conduction of generation heat thus the detected part 42 of testee 43, the surface emissivity infrared waves energy of described detected part 42 is received by infrared video camera 45, and the image that produces is sent to data acquisition control unit 46 and processes and store.
The employing focused solar energy that the present invention that shown in Figure 2 is proposes is as the outer thermal wave imaging nondestructive detection system in thermal excitation source.Condenser system 48 is with solar focusing and reflex to the detected part 42 of testee 43, and described condenser system 48 has two-dimensional adjustment mechanism 46, is used for the position of the tracking lock sun, stably is radiated at detected position 42 with the hot spot that keeps sun power always.
Because the area of catoptron is very large, so can adopt the way of combined planar mirror to realize.Level crossing 49 combinations of shown in Figure 3 is a 3x3 array, its focal spot is of a size of the area of single level crossing 49, and intensity of illumination is the stack of all flat mirror reflects light, i.e. the sunlight irradiation of 9 times and near the thermal excitation power of 10000 watts.
According to the distance of testee, described planar mirror array possesses the ability of the focus point that changes, the function of the line trace sun also simultaneously, so each level crossing mechanism that need to have two dimension to adjust independently.
That shown in Figure 4 is a kind of embodiment that realizes that the level crossing two dimension is adjusted.Solar focusing of the present invention system comprises a plurality of plane mirrors 49, each described catoptron 49 is arranged on the adjustable support 51 of one dimension angle of pitch, all angle of pitch adjustable support 51 is positioned on brace table 52 and forms ordered array, leaves a little space between catoptron so that the rotation of minute surface.The pitch regulation direction of described angle of pitch adjustable support 51 is the centers 54 that face reflection mirror array.Described brace table 52 is connected on a two-dimentional adjustable supporting mechanism 50.
Each independently the deflection angle of catoptron 49 be decided by that the distance of this catoptron and whole array center and array center are to the distance that is heated the zone.Whole array forms focusing effect, be decided by the size of single catoptron in the size of the position of focus focal spot, and light intensity is decided by the quantity of catoptron.Take Fig. 4 as example, if each catoptron is of a size of 1 square metre, will form 1 square metre of size on testee, luminous power is at the hot spot of more than 9000 watts of left and right.
The advantage of above-described embodiment is the function of the focusing of object and the tracking sun is adjusted respectively, the stabilized intensity of focal spot.But when number of mirrors was large, the load of two-dimentional adjustable supporting mechanism 50 can be very large.For this reason, Fig. 5 shows that another kind realizes the embodiment that level crossing two dimension is adjusted.Each independently catoptron 49 be arranged on two-dimentional adjustable supporting mechanism 55, whole two-dimentional adjustable supporting mechanisms 55 are placed on supporting substrate 52 and form ordered array.
The angular adjustment of each catoptron 49 needs to satisfy simultaneously the requirement that focuses on testee and follow the tracks of the sun.Its advantage is 55 deflections of bearing a catoptron of each two-dimentional adjustable supporting mechanism, load low, and the two-dimentional adjustable supporting mechanism 55 of all catoptrons is all identical, is conducive to produce install.
It is very ripe that the solar tracking technology develops at present, has a lot of modes to adopt.Shown in Figure 6 is the aided tracking system that adopts visible light camera 58.Described visible light camera 58 constantly gathers the image of the hot spot 42 of testee 43 and solar focusing, and relatively hot spot with respect to the movement of testee, calculates the deviation that side-play amount is corrected facula position by controlling two-dimentional adjustable supporting mechanism 50 again.
Claims (7)
1. an infrared thermal wave imaging nondestructive detection system, comprise infrared video camera (45), and thermal excitation source, and data acquisition control unit (46) is characterized in that: focused solar energy is adopted in described thermal excitation source.
2. infrared thermal wave imaging nondestructive detection system according to claim 1, it is characterized in that: described focusing solar energy driving source (48) has the function that moves from the motion tracking sun, makes the focus of described focusing solar energy driving source (48) not be offset because the sun moves on testee.
3. infrared thermal wave imaging nondestructive detection system according to claim 1, it is characterized in that: described focusing solar energy driving source (48) comprises at least can be at one-dimensional square to the pedestal of regulating (50), described pedestal (50) is provided with brace table (52), and described brace table (52) is provided with a plurality of catoptrons (49); Each described catoptron (49) has independently at least can be in the mechanism (51) of one-dimensional square to pitch regulation.
4. infrared thermal wave imaging nondestructive detection system according to claim 3, it is characterized in that: described catoptron (49) is concave mirror.
5. infrared thermal wave imaging nondestructive detection system according to claim 3, it is characterized in that: described catoptron (49) is level crossing.
6. infrared thermal wave imaging nondestructive detection system according to claim 2, it is characterized in that: described focusing solar energy driving source (48) automatic tracking system further comprises visible light camera (58).
7. a solar heat excitation infrared thermal wave imaging nondestructive inspection method, comprise the steps:
A., solar focusing system (48) is set, makes the reflected light of each plane mirror (49) focus on upper position to be measured at testee;
B. data acquisition control unit (46) by the image of visible light camera (58), analyze the focal position of described sun power with respect to the displacement of object under test;
C. by regulating the yawing moment of described focusing solar energy driving source (48), make the position of focus on described testee of described sun power remain unchanged;
D. data acquisition control unit (46) gather the infrared thermal wave image and process and store.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283652A (en) * | 2020-09-29 | 2021-01-29 | 南京飞赫电器有限公司 | Solar lighting system and method for shielding downward and sunny movement |
| CN113406146A (en) * | 2021-07-23 | 2021-09-17 | 中国航空综合技术研究所 | Infrared phase-locking thermal imaging defect identification method for honeycomb sandwich structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6195221A (en) * | 1984-10-16 | 1986-05-14 | Seiki Suyama | Image diagnosis of surface temperature of exfoliated tile of outer wall |
| CN101059452A (en) * | 2007-05-29 | 2007-10-24 | 浙江大学 | Fruit quality damage-free detection method and system based on multiple spectral imaging technique |
| CN101457991A (en) * | 2009-01-09 | 2009-06-17 | 丁建东 | Solar focus-fixing receiving arrangement for synchronously adjusting curvature and elevation angle |
| CN102331795A (en) * | 2011-08-26 | 2012-01-25 | 浙江中控太阳能技术有限公司 | Method for controlling sunlight reflecting device to automatically track sun based on facula identification |
| DE102010046493B3 (en) * | 2010-09-24 | 2012-03-08 | Thermosensorik Gmbh | Method for non-contact and non-destructive inspection of fault in rotor blades of wind power plant using heat flow thermography, involves arranging flying carrier at controlled distance from rotor blade to be tested |
| CN102789046A (en) * | 2012-07-30 | 2012-11-21 | 中国科学技术大学 | Multi-plane reflecting mirror solar energy condensation device |
-
2013
- 2013-03-19 CN CN2013100865971A patent/CN103175846A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6195221A (en) * | 1984-10-16 | 1986-05-14 | Seiki Suyama | Image diagnosis of surface temperature of exfoliated tile of outer wall |
| CN101059452A (en) * | 2007-05-29 | 2007-10-24 | 浙江大学 | Fruit quality damage-free detection method and system based on multiple spectral imaging technique |
| CN101457991A (en) * | 2009-01-09 | 2009-06-17 | 丁建东 | Solar focus-fixing receiving arrangement for synchronously adjusting curvature and elevation angle |
| DE102010046493B3 (en) * | 2010-09-24 | 2012-03-08 | Thermosensorik Gmbh | Method for non-contact and non-destructive inspection of fault in rotor blades of wind power plant using heat flow thermography, involves arranging flying carrier at controlled distance from rotor blade to be tested |
| CN102331795A (en) * | 2011-08-26 | 2012-01-25 | 浙江中控太阳能技术有限公司 | Method for controlling sunlight reflecting device to automatically track sun based on facula identification |
| CN102789046A (en) * | 2012-07-30 | 2012-11-21 | 中国科学技术大学 | Multi-plane reflecting mirror solar energy condensation device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283652A (en) * | 2020-09-29 | 2021-01-29 | 南京飞赫电器有限公司 | Solar lighting system and method for shielding downward and sunny movement |
| CN113406146A (en) * | 2021-07-23 | 2021-09-17 | 中国航空综合技术研究所 | Infrared phase-locking thermal imaging defect identification method for honeycomb sandwich structure |
| CN113406146B (en) * | 2021-07-23 | 2022-02-22 | 中国航空综合技术研究所 | Infrared phase-locking thermal imaging defect identification method for honeycomb sandwich structure |
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Application publication date: 20130626 |