CN111307829A - Nondestructive testing device and method for porous ceramic-based radome - Google Patents
Nondestructive testing device and method for porous ceramic-based radome Download PDFInfo
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- CN111307829A CN111307829A CN202010209000.8A CN202010209000A CN111307829A CN 111307829 A CN111307829 A CN 111307829A CN 202010209000 A CN202010209000 A CN 202010209000A CN 111307829 A CN111307829 A CN 111307829A
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- G—PHYSICS
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses a nondestructive testing device and a nondestructive testing method for a porous ceramic-based radome, wherein the device comprises the following components: the device comprises a base, a rotation detection system and a light source system; the rotation detection system and the light source system are arranged on the base; the rotation detecting system includes: the device comprises a rotary table, a transition table combination which is arranged on the rotary table and can rotate along with the rotary table, a lifting table combination which is arranged on the rotary table, a camera motion control mechanism which is arranged on the lifting table combination, and a detection camera combination which is connected with the camera motion control mechanism; the camera motion control mechanism and the detection camera are combined to be sealed in the antenna housing to be detected when the antenna housing is detected. The method provided by the invention can be used for carrying out nondestructive detection on the defects such as cracks, pores and scratches of the porous ceramic radome by utilizing the characteristic of micro light transmission of the porous ceramic, has strong detection capability and high efficiency, can meet the nondestructive detection of the thick-wall porous ceramic radome, and is simple in detection process and stable in detection result.
Description
Technical Field
The invention relates to the field of nondestructive testing of ceramic materials, in particular to a nondestructive testing device and a nondestructive testing method for a porous ceramic-based radome.
Background
The porous ceramic radome is widely applied to various high-speed aircrafts due to good comprehensive properties of heat, force and electricity. The porous ceramic radome is generally formed by high-temperature sintering, is brittle and fragile, has inevitable defects of microcracks, holes, impurities and the like in the forming process, is very easy to introduce the defects of cracks, scratches and the like in the processes of processing, post-treatment, testing, turnover and the like, and greatly influences the structural reliability of the radome due to the defects. Therefore, it is necessary to detect defects such as cracks, scratches, holes, and impurities of each radome by means of non-destructive inspection. At present, the nondestructive testing methods for ceramic and ceramic-based antenna covers mainly comprise CT, X-ray, infrared, ultrasonic, knocking, dye, illumination and the like.
The nondestructive testing technologies such as a light irradiation method, industrial CT and X-ray are compared in the nondestructive testing technology research on quartz ceramic radomes, published by Zhao Zhongzhao glass fiber reinforced plastic research institute, Inc. in the journal of ceramic science and newspaper, the maturity of the industrial CT and the X-ray in the porous ceramic testing application is not high, and the testing effect is limited, while the light irradiation testing technology has the advantages of simplicity and convenience in operation, low testing cost, visual testing result and the like. The illumination detection mentioned in the article is a manual detection state, and the detection result completely depends on manual experience.
The application of detection technologies such as ultrasonic, X-ray, infrared thermal imaging and the like in nondestructive detection of ceramics is summarized and the development prospect is analyzed in the application analysis of nondestructive detection technology in ceramic material detection in the issue of journal of ceramic industrial ceramics in Jiangxi province. The description herein focuses on the principles of the technology and its application.
The application of an instrument knocking method and a small hammer knocking method to a radome is introduced in the application of knocking detection technology to the active detection of a certain radome by the Chinese letters of wang, shines and the like of Beijing aviation material research institute in the journal of nondestructive detection, and the detection method is greatly influenced by environmental factors.
The application of an ultrasonic C scanning detection system in nondestructive detection of an antenna housing is researched by a large-scale rotating member water spray coupling ultrasonic C scanning detection system which is published in the journal of electronic mechanical engineering by Liu of Nanjing electronics technology institute. The system has stable operation and high detection precision, but has high cost, complex system structure and detection process and difficult simple application.
The hujiang peak of shanghai junbo composite technology limited introduces an online detection machine for ceramic radome cracks in patent CN207557138U, the detection machine utilizes a coloring agent to color the radome, then cleans the radome surface through a cleaning agent, and then identifies residual colors in the surface cracks through a CCD camera. However, the detection method is only suitable for detecting surface cracks in the early stage of the production process of the ceramic radome, and simultaneously needs more chemical color agents and cleaning agents, so that the environmental friendliness is low.
The Duyinflue of Anhui Yihuoshan casting Limited introduces a method for detecting cracks in a ceramic mould shell with a complex cavity in patent CN107941432A, and the detection method realizes detection of the penetrating cracks of the ceramic mould shell by applying pressure to methylene blue/alcohol colored solution. However, this pressure dyeing method is not suitable for the detection of porous ceramics, and also has a problem of environmental suitability.
In a Jiang of Yixing Bowdatake industrial equipment Limited company, a ceramic bottle leakage detection device based on machine vision is introduced in a patent CN109530266A, and aiming at the defects of ceramic wine bottles, the device adopts hot air or steam heating and combines an infrared camera photographing and machine vision analysis technology to realize online leakage detection of the leakage of the ceramic wine bottles. However, the hot air and steam heating is difficult to uniformly heat the whole large-size ceramic radome, so that the product size applicable to the method is limited.
The Liangkangning of the intelligent honest ceramic automation technology Limited company in the North Guangxi province introduces a daily ceramic crack detection device in the patent CN205982177U, and the device adopts a sound sensor to identify the knocking audio frequency based on manual knocking and analyzes and judges the audio frequency through a computer. However, the device can only detect small household products, and has the problem of high difficulty in positioning and quantitative analysis.
Yangjinlong of Qinghua university introduces a radome nondestructive testing device and method based on a knocking sound wave method in CN108508088A, the device adopts a precise electric rotary indexing table, an automatic volleyball and ball returning device, a sound collecting device and a computer analysis system aiming at a ceramic radome, and realizes automatic positioning and detection of defect positions by positioning and multipoint knocking the radome and collecting sound signals and comparing and analyzing the difference of the sound signals. However, the detection device and method cannot perform quantitative detection on the size of the defect, the detection result is easily affected by mechanical motion noise, the number of detection points is large, and the efficiency is low.
Zhao yu gang of Shandong's university of science has introduced a pottery radome optical transmission scanning detection device at CN 102749884A, the device arranges the light source in the radome inner chamber, arrange image acquisition device in the radome outside, control image acquisition device's position and angle through the motor, distance and the angle of guaranteeing image acquisition device and radome surface are invariable, combine the revolving stage to drive the radome and do rotatory coordinated movement simultaneously, realized the crackle of thin wall pottery radome, the gas pocket, mar automatic scanning detects, the device structure is simple relatively, the testing process is easy to operate, the testing result is also more directly perceived, easily realize the online integration at radome production process. However, the device is limited by the size of the inner cavity of the antenna housing, and a light source with a too complicated structural form is not suitable for being adopted, so that the brightness of the light source is difficult to improve; the distances between different positions of the antenna housing and the light source are greatly different, so that the illumination of the inner surface of the antenna housing is not uniform; the light transmittance of the porous ceramic is not high, the light intensity transmitted to the outer surface is insufficient, and the light intensity is rapidly reduced along with the increase of the thickness of the ceramic, so that the detection result is extremely easily influenced by the environmental light factor. Therefore, the device is not suitable for nondestructive testing of porous ceramics and antenna covers with thick wall thickness.
Disclosure of Invention
The invention aims to provide a nondestructive testing device and a nondestructive testing method for a porous ceramic-based radome, which are used for solving the problems of insufficient overall brightness of a light source, inconsistent surface illumination of the radome, serious influence of ambient light on a testing result and the like, have stronger testing capability and higher efficiency, can meet the nondestructive testing requirement of the thick-wall porous ceramic-based radome, and are simple in testing process and stable in testing result.
In order to achieve the above object, the present invention provides a nondestructive testing device for a porous ceramic-based radome, comprising: the antenna comprises a base, a rotation detection system and a light source system for irradiating an antenna housing to be detected; the rotation detection system and the light source system are arranged on the base; the rotation detecting system includes: the detection device comprises a rotary table, a transition table combination, a lifting table combination, a camera motion control mechanism and a detection camera combination, wherein the transition table combination is arranged on the rotary table, can rotate along with the rotary table and is used for placing an antenna housing to be detected; the camera motion control mechanism and the detection camera are combined to be sealed in the antenna housing to be detected when the antenna housing is detected.
The nondestructive testing device for the porous ceramic-based radome comprises a light source system and a detection system, wherein the light source system comprises: the device comprises a light source motion control mechanism, a quick-change device connected with the light source motion control mechanism and a detection light source arranged on the quick-change device.
The nondestructive testing device for the porous ceramic-based radome comprises a light source motion control mechanism and a detection mechanism, wherein the light source motion control mechanism comprises: the device comprises a motor bracket, a first linear motor arranged on the motor bracket, a second linear motor arranged on the first linear motor and capable of vertically moving up and down along the first linear motor, and a first rotating motor arranged at one end of a quick-change device and capable of driving a detection light source to rotate; the other end of the quick-change device is arranged on the second linear motor and can horizontally move left and right along the second linear motor.
The nondestructive testing device for the porous ceramic-based radome comprises a turntable, wherein the turntable comprises: an outer layer rotating part and an inner layer fixing part.
The nondestructive testing device for the porous ceramic-based radome comprises a transition table assembly and a plurality of transition tables, wherein the transition tables comprise: the antenna housing comprises a lower transition ring arranged on the outer layer rotating part, an upper transition ring used for placing the antenna housing to be detected and a plurality of support columns arranged between the upper transition ring and the lower transition ring.
The nondestructive testing device for the porous ceramic-based radome comprises a lifting platform, wherein the lifting platform comprises: the antenna housing comprises a lifting mechanism arranged on an inner layer fixing part, a mounting platform arranged on the lifting mechanism and attached to an upper transition ring when the antenna housing is detected, and a sealing ring arranged on the mounting platform and used for shading and sealing between the mounting platform and the upper transition ring.
The nondestructive testing device for the porous ceramic-based radome comprises a camera motion control mechanism and a detection mechanism, wherein the camera motion control mechanism comprises: the third linear motor is arranged on the mounting platform; a second rotating electric machine provided on the third linear electric machine and capable of moving linearly along the third linear electric machine; the fourth linear motor is arranged on the second rotating motor and is driven by the second rotating motor to do rotating work; the camera transition bracket is arranged on the fourth linear motor and can linearly move along the fourth linear motor; and the third rotating motor is arranged on the camera transition support and drives the detection camera assembly to rotate.
The nondestructive testing device for the porous ceramic-based radome comprises the following components in combination: a camera support connected with the third rotating motor, and a wide-angle industrial camera and a high-power industrial camera arranged at two ends of the camera support.
The nondestructive testing device for the porous ceramic-based radome comprises: the detection control system is used for controlling the detection device in the detection process; and the detection analysis system is used for analyzing the detection image and the detection result and outputting a detection report.
The invention also provides a nondestructive testing method for the porous ceramic-based radome, which is realized based on the nondestructive testing device for the porous ceramic-based radome and comprises the following steps:
step S1: opening the antenna housing nondestructive testing device, and entering a standby state after the device performs self-testing;
step S2: placing an antenna housing to be detected on the upper transition ring;
step S3: selecting a corresponding detection program according to the specification of the antenna housing to be detected;
step S4: installing a rough inspection light source, and starting an antenna housing rough inspection program;
step S5: the lifting mechanism drives the mounting platform to ascend until the sealing ring is completely attached to the upper transition ring, a closed black cavity is formed inside the antenna housing, and the device enters a state to be detected;
step S6: the antenna housing nondestructive testing device automatically turns on a testing light source and calls a rough inspection camera;
step S7: the antenna housing nondestructive testing device performs rough testing according to a rough testing program under the control of the testing control system;
step S8: after the rough inspection is finished, the antenna housing nondestructive testing device automatically restores to a state to be detected, the detection analysis system analyzes the rough inspection result, if a defect or suspected defect exists, the operation jumps to S9, otherwise, the operation jumps to S15;
step S9: based on the positions of the defects and the suspected defects, the detection control system automatically forms a secondary fine detection program;
step S10: dismantling the rough inspection light source device, installing a fine inspection light source, and starting a secondary fine inspection program of the antenna housing;
step S11: the antenna housing nondestructive testing device automatically turns on a testing light source and calls a fine inspection camera;
step S12: the antenna housing nondestructive testing device carries out secondary fine inspection according to the program under the control of the detection control system;
step S13: after the secondary fine inspection is finished, the radome nondestructive testing device automatically restores to a state to be tested;
step S14: the detection analysis system analyzes the secondary fine inspection result to determine the type, size and position distribution of the defects;
step S15: and forming a detection conclusion, outputting a detection report, restoring the device to a standby state, and closing the device.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the nondestructive testing device for the porous ceramic-based radome, the testing light source is arranged on the outer side of the radome to be tested, so that the limitation of the size of the light source is removed, a high-brightness parallel light source with a complex structure is applied, and the brightness of the testing light source is greatly improved;
(2) the nondestructive testing device for the porous ceramic-based radome realizes the constancy of the distance between the detection light source and the surface of the radome in the testing process through the detection light source motion control mechanism, and effectively ensures the stability of the illumination of the detection light source at different detection positions of the radome;
(3) according to the nondestructive testing device for the porous ceramic-based radome, the detection camera is arranged in the inner cavity of the radome to be tested, and meanwhile, the inner cavity of the radome is sealed, so that the interference of ambient light on a testing result is effectively avoided.
(4) According to the nondestructive testing device and the nondestructive testing method for the porous ceramic-based radome, two testing modes of rough testing and fine testing are formed through the combination of the testing light sources with different specifications and the cameras, the suspected defect area is rapidly determined through the rough testing, then the secondary fine testing is carried out on the suspected defect area, and the testing efficiency is greatly improved on the basis of ensuring the testing quality.
Drawings
FIG. 1 is a schematic view of a nondestructive testing apparatus for a porous ceramic-based radome in accordance with the present invention;
FIG. 2 is a schematic view of a rotation detection system according to the present invention;
FIG. 3 is a schematic diagram of a nondestructive testing device for a porous ceramic-based radome in accordance with the present invention in a standby state;
FIG. 4 is a schematic diagram of the nondestructive testing device for the porous ceramic-based radome in the invention;
FIG. 5 is a schematic top view of the nondestructive testing apparatus for a porous ceramic-based radome of the present invention;
FIG. 6 is a schematic flow chart of a nondestructive testing method for a porous ceramic-based radome in accordance with the present invention.
Detailed Description
The invention will be further described by the following specific examples in conjunction with the drawings, which are provided for illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1-2, the present invention provides a nondestructive testing apparatus for a porous ceramic-based radome, comprising: the detection device comprises a base 1, a rotation detection system 2, a light source system 3 for irradiating an antenna housing 4 to be detected, a detection control system and a detection analysis system; the rotation detection system 2 and the light source system 3 are arranged on the base 1; the base 1 is used for supporting, installing and fixing the rotation detection system 2 and the light source system 3, and ensures the stability of the relative positions of the rotation detection system 2 and the light source system 3. The detection control system is used for controlling the detection device in the detection process; the detection analysis system is used for analyzing the detection image and the detection result and outputting a detection report.
The rotation detecting system 2 includes: the detection device comprises a rotary table 21, a transition table combination 22, a lifting table combination 23, a camera motion control mechanism 24 and a detection camera combination 25, wherein the transition table combination 22 is arranged on the rotary table 21 and can rotate along with the rotary table 21 and is used for placing the antenna housing 4 to be detected; during detection, the radome 4 to be detected (in the schematic diagram, the radome in a half-open state, actually, a complete revolving body) is buckled on the transition table assembly 22, and the camera motion control mechanism 24 and the detection camera assembly 25 are sealed in the inner cavity.
The turntable 21 includes: an outer rotating portion 211 and an inner fixing portion 212. Wherein the outer layer rotating part 211 can rotate under the control of the detection control system.
The transition table assembly 22 includes: a lower transition ring 221 provided on the outer layer rotating part 211, an upper transition ring 223 for placing the radome 4 to be inspected, and a plurality of support columns 222 provided between the upper transition ring 223 and the lower transition ring 221. A plurality of locating pins 224 are also provided on the upper transition ring 223. The supporting column 222 is used for connecting the lower transition ring 221 and the upper transition ring 223 and ensuring the parallelism of the lower transition ring 221 and the upper transition ring 223, the upper transition ring 223 is used for placing the radome 4 to be detected, and the accuracy and consistency of the placing position of the radome 4 to be detected are ensured through the positioning pin 224.
The lifting platform assembly 23 includes: the inner layer fixing part 212 comprises a lifting mechanism 231 arranged on the inner layer fixing part 212, an installation platform 232 arranged on the lifting mechanism 231 and attached to the upper transition ring 223 during antenna cover detection for installing the camera motion control mechanism 24, and a sealing ring 233 arranged on the installation platform 232 and used for shading and sealing between the installation platform 232 and the upper transition ring 223. The elevating mechanism 231 can move up and down under the control of the detection control system, and the mounting platform 232 is used for mounting the camera motion control mechanism 24.
The camera motion control mechanism 24 is disposed on the mounting platform 232, preferably a motor assembly formed by a linear motor and a rotating motor or a standard mini-robot arm, and can drive the detection camera assembly 25 to perform two-dimensional position motion and rotation motion under the control of the detection control system. Preferably, the camera motion control mechanism 24 includes: a third linear motor 241 provided on the mounting platform 232; a second rotating electric machine 242 provided on the third linear electric machine 241 and capable of moving linearly along the third linear electric machine 241; a fourth linear motor 243 provided on the second rotating motor 242 and driven by the second rotating motor 242 to perform rotational work; a camera transition bracket 245 provided on the fourth linear motor 243 and capable of moving linearly along the fourth linear motor 243; and a third rotating motor 244 disposed on the camera transition bracket 245 and driving the detecting camera assembly 25 to rotate.
The inspection camera assembly 25 includes: a camera mount 251 connected to the third rotating motor 244, and a wide-angle industrial camera 252 and a high-power industrial camera 253 provided at both ends of the camera mount 251. Wherein the wide-angle industrial camera 252 is used for rough inspection and the high-power industrial camera 253 is used for fine inspection. The camera motion control 24 is invoked by the detection control system in accordance with the detection mode.
The light source system 3 mounting plane is higher than the detection system mounting plane by about 500mm, and comprises: the device comprises a light source motion control mechanism 31, a quick change device 32 connected with the light source motion control mechanism 31 and a detection light source 33 arranged on the quick change device 32.
The light source motion control mechanism 31 is arranged on the base 1, preferably a motor combination or a standard mechanical arm consisting of a linear motor and a rotating motor, and can drive the detection light source 33 to move in two-dimensional positions and rotate under the control of the detection control system. Preferably, the light source motion control mechanism 31 includes: the detection device comprises a motor bracket 313, a first linear motor 311 arranged on the motor bracket 313, a second linear motor 312 which is arranged on the first linear motor 311 and can vertically move up and down along the first linear motor 311, and a first rotating motor 314 which is arranged at one end of the quick-change device 32 and can drive the detection light source 33 to rotate; the other end of the quick-change device 32 is arranged on the second linear motor 312 and can horizontally move left and right along the second linear motor 312.
The detection light source 33 is preferably a large-area medium-high-intensity parallel light source device and a medium-area medium-small-area ultrahigh-intensity parallel light source device, and the quick switching of different light source devices can be realized through the quick-change device 32. Wherein, the large-area medium-high intensity parallel light source device is used for rough inspection, and the medium-small area ultrahigh intensity parallel light source device is used for fine inspection. The lowest reachable position of the central point of the detection light source 33 should be slightly lower than the mounting platform 232, and the highest reachable position should be higher than the standing point of the radome to be detected.
The wide-angle industrial camera 252, the high-power industrial camera 253 and the detection light source 33 are controlled by the detection control system, and the distance between the wide-angle industrial camera 252, the high-power industrial camera 253 and the detection light source 33 and the inner and outer surfaces of the radome detection area center 41 is kept constant during detection, and is positioned in the same plane with a bus 42 where the radome detection area center 41 is located and is overlapped with a curved surface normal 43 of the radome detection area center 41.
As shown in fig. 3, when the porous ceramic-based radome nondestructive testing apparatus is in a standby state, the lifting platform assembly 23, the camera motion control mechanism 24 and the detection camera assembly 25 are contracted inside the transition platform assembly 22, and are integrally higher than the upper transition ring 223 by no more than 100mm, so as to reduce the influence on placing the radome 4 to be detected. When the lifting mechanism 231 drives the mounting platform 232 to ascend to the sealing ring 233 to be completely attached to the upper transition ring 223 under the control of the detection control system, the inner cavity of the antenna housing becomes a quasi-closed black cavity, and at the moment, the equipment enters a state to be detected.
As shown in fig. 4, when the radome is subjected to nondestructive inspection, the camera assembly and the inspection light source 33 are controlled by the inspection control system to perform two-dimensional motion in the plane of the bus 42 of the radome 4 to be inspected, and the intersection point of the connection line of the center of the inspection camera assembly 25 and the center of the inspection light source 33 and the radome is the inspection area center 41. During the detection movement, the central axes of the camera assembly and the detection light source 33 are coincident with the normal line 43 corresponding to the center 41 of the radome detection area, and the distance d1 from the camera assembly to the inner surface of the center 41 of the radome detection area and the distance d2 from the detection light source 33 to the outer surface of the center 41 of the radome detection area are both kept constant, wherein d1 is generally 15mm to 50mm, and d2 is generally 50mm to 100mm within the adjustable focal length range of the detection camera. The central support double-layer rotary table 21 is matched to drive the radome 4 to be detected to do coordinated rotary motion, so that nondestructive detection of a large part of the radome 4 to be detected is realized.
As shown in fig. 5, as the center 41 of the detection area gradually rises, when the detection camera assembly 25 cannot keep the detection state shown in fig. 4 due to the influence of the size of the radome 4 to be detected, the detection control system controls the detection camera assembly 25 and the detection light source 33 to directly move to the state shown in fig. 5, so as to perform the integral detection on the top of the radome 4 to be detected, and the field of view of the detection camera is called to completely cover the area which is not detected on the top.
As shown in fig. 6, the present invention further provides a nondestructive testing method for a porous ceramic-based radome, which is implemented based on the nondestructive testing apparatus for a porous ceramic-based radome, and the method includes:
step S1: opening the antenna housing nondestructive testing device, and entering a standby state after the device performs self-testing;
step S2: placing the radome 4 to be detected on the upper transition ring 223;
step S3: selecting a corresponding detection program according to the specification of the antenna housing 4 to be detected;
step S4: installing a rough inspection light source, and starting an antenna housing rough inspection program;
step S5: the lifting mechanism 231 drives the mounting platform 232 to ascend until the sealing ring 233 is completely attached to the upper transition ring 223, a closed black cavity is formed inside the antenna housing, and the device enters a state to be detected;
step S6: the antenna housing nondestructive testing device automatically turns on the testing light source 33 and calls the rough inspection camera;
step S7: the antenna housing nondestructive testing device performs rough testing according to a rough testing program under the control of the testing control system;
step S8: after the rough inspection is finished, the antenna housing nondestructive testing device automatically restores to a state to be detected, the detection analysis system analyzes the rough inspection result, if a defect or suspected defect exists, the operation jumps to S9, otherwise, the operation jumps to S15;
step S9: based on the positions of the defects and the suspected defects, the detection control system automatically forms a secondary fine detection program;
step S10: dismantling the rough inspection light source device, installing a fine inspection light source, and starting a secondary fine inspection program of the antenna housing;
step S11: the antenna housing nondestructive testing device automatically turns on the testing light source 33 and calls the fine inspection camera;
step S12: the antenna housing nondestructive testing device carries out secondary fine inspection according to the program under the control of the detection control system;
step S13: after the secondary fine inspection is finished, the radome nondestructive testing device automatically restores to a state to be tested;
step S14: the detection analysis system analyzes the secondary fine inspection result to determine the type, size and position distribution of the defects;
step S15: and forming a detection conclusion, outputting a detection report, restoring the device to a standby state, and closing the device.
In conclusion, the invention utilizes the characteristic of micro light transmission of the porous ceramic to carry out nondestructive detection on the defects of cracks, air holes, scratches and the like of the porous ceramic radome, has strong detection capability and high efficiency, can meet the nondestructive detection of the thick-wall porous ceramic radome, and has simple detection process and stable detection result.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. A porous ceramic-based radome nondestructive testing device is characterized by comprising: the antenna comprises a base, a rotation detection system and a light source system for irradiating an antenna housing to be detected; the rotation detection system and the light source system are arranged on the base; the rotation detecting system includes: the detection device comprises a rotary table, a transition table combination, a lifting table combination, a camera motion control mechanism and a detection camera combination, wherein the transition table combination is arranged on the rotary table, can rotate along with the rotary table and is used for placing an antenna housing to be detected; the camera motion control mechanism and the detection camera are combined to be sealed in the antenna housing to be detected when the antenna housing is detected.
2. The apparatus according to claim 1, wherein the light source system comprises: the device comprises a light source motion control mechanism, a quick-change device connected with the light source motion control mechanism and a detection light source arranged on the quick-change device.
3. The apparatus according to claim 2, wherein the light source motion control mechanism comprises: the device comprises a motor bracket, a first linear motor arranged on the motor bracket, a second linear motor arranged on the first linear motor and capable of vertically moving up and down along the first linear motor, and a first rotating motor arranged at one end of a quick-change device and capable of driving a detection light source to rotate; the other end of the quick-change device is arranged on the second linear motor and can horizontally move left and right along the second linear motor.
4. The apparatus according to claim 3, wherein the turret comprises: an outer layer rotating part and an inner layer fixing part.
5. The apparatus according to claim 4, wherein the transition table assembly comprises: the antenna housing comprises a lower transition ring arranged on the outer layer rotating part, an upper transition ring used for placing the antenna housing to be detected and a plurality of support columns arranged between the upper transition ring and the lower transition ring.
6. The apparatus according to claim 5, wherein the lifter assembly comprises: the antenna housing comprises a lifting mechanism arranged on an inner layer fixing part, a mounting platform arranged on the lifting mechanism and attached to an upper transition ring when the antenna housing is detected, and a sealing ring arranged on the mounting platform and used for shading and sealing between the mounting platform and the upper transition ring.
7. The non-destructive testing apparatus for a porous ceramic based radome of claim 6, wherein the camera motion control mechanism comprises: the third linear motor is arranged on the mounting platform; a second rotating electric machine provided on the third linear electric machine and capable of moving linearly along the third linear electric machine; the fourth linear motor is arranged on the second rotating motor and is driven by the second rotating motor to do rotating work; the camera transition bracket is arranged on the fourth linear motor and can linearly move along the fourth linear motor; and the third rotating motor is arranged on the camera transition support and drives the detection camera assembly to rotate.
8. The apparatus of claim 7, wherein the inspection camera assembly comprises: a camera support connected with the third rotating motor, and a wide-angle industrial camera and a high-power industrial camera arranged at two ends of the camera support.
9. The non-destructive testing apparatus for a porous ceramic based radome of claim 8, wherein the testing apparatus further comprises: the detection control system is used for controlling the detection device in the detection process; and the detection analysis system is used for analyzing the detection image and the detection result and outputting a detection report.
10. A nondestructive testing method for a porous ceramic-based radome, wherein the method is implemented based on the nondestructive testing device for a porous ceramic-based radome of claim 9, and the method comprises the following steps:
step S1: opening the antenna housing nondestructive testing device, and entering a standby state after the device performs self-testing;
step S2: placing an antenna housing to be detected on the upper transition ring;
step S3: selecting a corresponding detection program according to the specification of the antenna housing to be detected;
step S4: installing a rough inspection light source, and starting an antenna housing rough inspection program;
step S5: the lifting mechanism drives the mounting platform to ascend until the sealing ring is completely attached to the upper transition ring, a closed black cavity is formed inside the antenna housing, and the device enters a state to be detected;
step S6: the antenna housing nondestructive testing device automatically turns on a testing light source and calls a rough inspection camera;
step S7: the antenna housing nondestructive testing device performs rough testing according to a rough testing program under the control of the testing control system;
step S8: after the rough inspection is finished, the antenna housing nondestructive testing device automatically restores to a state to be detected, the detection analysis system analyzes the rough inspection result, if a defect or suspected defect exists, the operation jumps to S9, otherwise, the operation jumps to S15;
step S9: based on the positions of the defects and the suspected defects, the detection control system automatically forms a secondary fine detection program;
step S10: dismantling the rough inspection light source device, installing a fine inspection light source, and starting a secondary fine inspection program of the antenna housing;
step S11: the antenna housing nondestructive testing device automatically turns on a testing light source and calls a fine inspection camera;
step S12: the antenna housing nondestructive testing device carries out secondary fine inspection according to the program under the control of the detection control system;
step S13: after the secondary fine inspection is finished, the radome nondestructive testing device automatically restores to a state to be tested;
step S14: the detection analysis system analyzes the secondary fine inspection result to determine the type, size and position distribution of the defects;
step S15: and forming a detection conclusion, outputting a detection report, restoring the device to a standby state, and closing the device.
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| CN202010209000.8A CN111307829A (en) | 2020-03-23 | 2020-03-23 | Nondestructive testing device and method for porous ceramic-based radome |
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| US20060070453A1 (en) * | 2004-09-30 | 2006-04-06 | The Regents Of The University Of California | Ceramic inspection system |
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Application publication date: 20200619 |