CN111220708A - Ultrasonic C scanning detection method for foam sandwich structure radar cover - Google Patents
Ultrasonic C scanning detection method for foam sandwich structure radar cover Download PDFInfo
- Publication number
- CN111220708A CN111220708A CN201911235868.9A CN201911235868A CN111220708A CN 111220708 A CN111220708 A CN 111220708A CN 201911235868 A CN201911235868 A CN 201911235868A CN 111220708 A CN111220708 A CN 111220708A
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- Prior art keywords
- ultrasonic
- sandwich structure
- foam sandwich
- radar cover
- probe
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000006260 foam Substances 0.000 title claims abstract description 43
- 238000001514 detection method Methods 0.000 title claims abstract description 37
- 239000000523 sample Substances 0.000 claims abstract description 43
- 230000005284 excitation Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000919 ceramic Substances 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 2
- 230000035515 penetration Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000009659 non-destructive testing Methods 0.000 abstract description 2
- 238000001028 reflection method Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011378 penetrating method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0609—Display arrangements, e.g. colour displays
- G01N29/0645—Display representation or displayed parameters, e.g. A-, B- or C-Scan
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2437—Piezoelectric probes
- G01N29/245—Ceramic probes, e.g. lead zirconate titanate [PZT] probes
Abstract
The invention belongs to the field of nondestructive testing, and particularly relates to an ultrasonic C scanning detection method for a foam sandwich structure radar cover. The invention relates to an ultrasonic C scanning detection method of a foam sandwich structure radar cover, which adopts an ultrasonic transmitting probe arranged on the bag-leaning surface of the foam sandwich structure radar cover, an ultrasonic receiving probe arranged on the mold-attaching surface of the radar cover and coaxial with the ultrasonic transmitting probe, wherein the transmitting frequency of the ultrasonic transmitting probe is 0.1-1 MHz. The invention adopts the probe with a specific structure, and realizes the ultrasonic C scanning detection of the foam sandwich structure radome penetration method by setting the frequency and the excitation pulse parameters, thereby greatly reducing the time spent on the detection, improving the detection efficiency and simultaneously obtaining better detection effect.
Description
Technical Field
The invention belongs to the field of nondestructive testing, and particularly relates to an ultrasonic C scanning detection method for a foam sandwich structure radar cover.
Background
The radar cover with a foam sandwich structure is shown in figure 1, and has a structure form of a foam A sandwich, and the radar cover is integrally divided into a solid area 1 and a foam sandwich area 2. The foam sandwich area is of an A sandwich structure with an upper skin layer, a lower skin layer and a foam sandwich layer in the middle, the skins and the foam are glued by using glue films, debonding defects are easily generated in the manufacturing process of the structural form, and the debonding defects of the foam sandwich area need to be detected and evaluated by adopting a proper nondestructive detection method, so that the final product quality of the radome is ensured.
The most effective nondestructive detection method for debonding defects inside the foam sandwich structure is ultrasonic C scanning, and as the foam sandwich is of a porous loose structure, the ultrasonic wave is greatly attenuated, and the ultrasonic C scanning detection by a penetration method cannot be realized, the commonly adopted detection technology is pulse reflection ultrasonic C scanning. However, in the actual detection process, the pulse reflection method for detecting the foam sandwich structure radar cover has the following problems:
(1) when the pulse reflection method is adopted for detection, detection needs to be carried out on two surfaces of the foam sandwich structure radar cover, and the detection efficiency is low.
(2) When the pulse reflection method is adopted for detection, in order to obtain an ultrasonic C scanning image, interface waves of a bonding interface of the skin and the foam sandwich need to be monitored constantly, but because the thickness of the skin is generally small and the foam sandwich is porous and loose, the interface waves cannot be monitored effectively constantly, and the final detection effect of ultrasonic C scanning is poor.
Disclosure of Invention
The purpose of the invention is: the ultrasonic C scanning detection method can realize ultrasonic penetration of the foam sandwich structure radome.
The technical scheme of the invention is as follows: an ultrasonic C scanning detection method of a foam sandwich structure radar cover is characterized in that an ultrasonic transmitting probe is arranged on the bag-leaning surface of the foam sandwich structure radar cover, an ultrasonic receiving probe is arranged on the mold-attaching surface of the radar cover and is coaxial with the ultrasonic transmitting probe, and the transmitting frequency of the ultrasonic transmitting probe is 0.1-1 MHz.
The excitation pulse voltage for exciting the ultrasonic wave transmitting probe to generate ultrasonic waves is 200V-400V.
The excitation pulse width for exciting the ultrasonic emission probe to generate the ultrasonic is 300-1200 mu s.
The ultrasonic transmitting probe and the ultrasonic receiving probe are both wafer immersed flat probes.
The wafer type water immersion probe comprises a shell, a wafer, a transmission wave plate and a binding post, wherein the shell is a metal shell, the wafer is a ceramic wafer and is arranged in the shell, a vibration plate is arranged on the wafer and is packaged by the transmission wave plate, and the binding post is communicated with the shell and is internally provided with a connecting wire connected with the vibration plate of the wafer.
The transmission wave plate is a planar lens.
The ceramic wafer is a sheet structure with a certain thickness, and the thickness direction of the ceramic wafer is a sound production end.
The ceramic wafer is of a wafer structure, and the diameter of the ceramic wafer is 15-25 mm.
The invention has the technical effects that: the invention adopts the probe with a specific structure, and realizes the ultrasonic C scanning detection of the foam sandwich structure radome penetration method by setting the frequency and the excitation pulse parameters, thereby greatly reducing the time spent on the detection, improving the detection efficiency and simultaneously obtaining better detection effect.
Drawings
FIG. 1 is a schematic view of a foam sandwich structured radar cover;
FIG. 2 is a schematic diagram of the principle of the ultrasonic C-scan detection method of the foam sandwich structure radar cover of the present invention;
fig. 3 is a schematic view of the probe structure.
The device comprises a solid area 1, a foam interlayer area 2, an ultrasonic wave transmitting probe 3, an ultrasonic wave receiving probe 4, a binding post 5, a cable 6, a piezoelectric wafer 7, a shell 8, a damping block 9 and a transmission wave plate 10.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples, which are not intended to be exhaustive or to be limiting.
Example 1:
referring to fig. 2, when the method for ultrasonic C-scan detection of a radar cover with a foam sandwich structure according to the present invention is implemented, an ultrasonic transmitting probe 3 is disposed on a bag-side surface of the radar cover with a foam sandwich structure, and another ultrasonic receiving probe 4 is disposed on a mold-attaching surface of the radar cover and is coaxial with the ultrasonic transmitting probe. In the invention, in order to ensure that the ultrasonic wave can penetrate through the foam, the ultrasonic wave excitation parameters are specifically controlled. For this reason, the excitation pulse voltage for exciting the ultrasonic wave transmission probe to generate the ultrasonic wave is 300V, and the excitation pulse width for exciting the ultrasonic wave transmission probe to generate the ultrasonic wave is 800 μ s, so that under the ultrasonic excitation, the ultrasonic wave transmission probe can transmit the ultrasonic wave of 0.5MHz, so that the penetration of the foam can be effectively achieved.
Meanwhile, in order to ensure the ultrasonic C scanning penetration effect, the ultrasonic wave transmitting probe and the ultrasonic wave receiving probe are specially arranged. The ultrasonic transmitting probe and the ultrasonic receiving probe have the same structure and are both wafer immersed flat probes.
Referring to fig. 3, the wafer-type probe includes a terminal 5, a piezoelectric wafer 7, a housing 8, a damping block 9 and a wave-transmitting plate 10. Wherein, the shell 8 is a metal shell for protecting the internal structure of the probe. The piezoelectric wafer 7 is a ceramic wafer and is arranged in the shell, the damping block 9 is used for filling the piezoelectric wafer to prevent the piezoelectric wafer 7 from moving backwards, and the wave-transmitting window of the shell 8 is packaged by the wave-transmitting piece 10. The ceramic wafer is of a wafer structure with a certain thickness, the diameter of the ceramic wafer is 20mm, and the thickness direction of the ceramic wafer is a sound production end. Meanwhile, an electric vibration plate is disposed on the ceramic wafer. The binding post 5 is communicated with the shell 8, and a connecting wire for connecting the wafer vibrating piece is arranged in the binding post. When the electric vibration piece is connected with a power supply, the electric vibration piece vibrates to drive the ceramic wafer to vibrate, so that ultrasonic waves are generated in the thickness direction of the ceramic wafer and penetrate through the transmission wave plate to be transmitted. The wave-transmitting plate is a planar lens, the sound beam is wide, the energy is high, and the ultrasonic wave can effectively penetrate through the foam by matching with the vibration of the ceramic wafer.
According to the ultrasonic C scanning detection method of the foam sandwich structure radar cover, through the design of the probe and the optimization of the detection process parameters of the penetrating method ultrasonic C scanning, the ultrasonic penetration of the foam sandwich structure radar cover is finally realized, and the pulse reflection method ultrasonic C scanning is replaced, so that the detection efficiency is improved, and a better detection effect is obtained.
Claims (8)
1. An ultrasonic C scanning detection method of a foam sandwich structure radar cover is characterized in that an ultrasonic transmitting probe is arranged on the bag-leaning surface of the foam sandwich structure radar cover, an ultrasonic receiving probe is arranged on the mold-pasting surface of the radar cover and is coaxial with the ultrasonic transmitting probe, and the transmitting frequency of the ultrasonic transmitting probe is 0.1-1 MHz.
2. The ultrasonic C-scan detection method of the foam sandwich structure radar cover according to claim 1, wherein an excitation pulse voltage for exciting the ultrasonic wave emission probe to generate ultrasonic waves is 200V-400V.
3. The ultrasonic C-scan detection method of the foam sandwich structure radar cover according to claim 2, wherein the excitation pulse width for exciting the ultrasonic wave emission probe to generate ultrasonic waves is 300-1200 μ s.
4. The method for ultrasonic C-scan inspection of a foam sandwich structure radar cover of claim 1, wherein the ultrasonic transmission probe and the ultrasonic reception probe are both water immersion wafer type flat probes.
5. The method for ultrasonic C-scan inspection of a radome with a foam sandwich structure according to claim 1, wherein the wafer-immersed probe comprises a housing, a wafer, a wave-transmitting plate and a terminal, wherein the housing is a metal housing, the wafer is a ceramic wafer and is disposed in the housing, the wafer is provided with a vibrating plate and is packaged by the wave-transmitting plate, the terminal is communicated with the housing, and a connecting wire connected to the vibrating plate of the wafer is disposed inside the terminal.
6. The method for ultrasonic C-scan detection of a foam sandwich structure radar cover of claim 5, wherein the transmission plate is a planar lens.
7. The method for ultrasonic C-scan detection of a foam sandwich structure radar cover according to claim 6, wherein the ceramic wafer is a sheet structure with a certain thickness, and the thickness direction of the ceramic wafer is a sound emitting end.
8. The ultrasonic C-scan detection method of the foam sandwich structure radar cover according to claim 7, wherein the ceramic wafer is of a wafer structure and has a diameter of 15-25 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235868.9A CN111220708A (en) | 2019-12-05 | 2019-12-05 | Ultrasonic C scanning detection method for foam sandwich structure radar cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235868.9A CN111220708A (en) | 2019-12-05 | 2019-12-05 | Ultrasonic C scanning detection method for foam sandwich structure radar cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111220708A true CN111220708A (en) | 2020-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911235868.9A Pending CN111220708A (en) | 2019-12-05 | 2019-12-05 | Ultrasonic C scanning detection method for foam sandwich structure radar cover |
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| CN (1) | CN111220708A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308118A (en) * | 2007-05-14 | 2008-11-19 | 中国科学院金属研究所 | High-sensitivity ultrasonic probe |
| CN102226784A (en) * | 2011-04-11 | 2011-10-26 | 中国铁道科学研究院金属及化学研究所 | Ultrasonic probe |
| CN202974955U (en) * | 2012-11-27 | 2013-06-05 | 桂林电子科技大学 | High frequency short pulse immersion focusing ultrasonic probe |
| CN103954692A (en) * | 2014-05-06 | 2014-07-30 | 常州市常超电子研究所有限公司 | Reflection type adjustable ultrasonic probe |
| CN104977356A (en) * | 2015-07-31 | 2015-10-14 | 中航复合材料有限责任公司 | Composite material foam structure ultrasonic detection method based on reflection theory |
| CN105004793A (en) * | 2015-07-31 | 2015-10-28 | 中航复合材料有限责任公司 | Ultrasonic testing method used for composite material foaming structures |
| CN106353408A (en) * | 2016-08-26 | 2017-01-25 | 中国科学院声学研究所 | Piezoelectric ultrasonic straight probe |
-
2019
- 2019-12-05 CN CN201911235868.9A patent/CN111220708A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308118A (en) * | 2007-05-14 | 2008-11-19 | 中国科学院金属研究所 | High-sensitivity ultrasonic probe |
| CN102226784A (en) * | 2011-04-11 | 2011-10-26 | 中国铁道科学研究院金属及化学研究所 | Ultrasonic probe |
| CN202974955U (en) * | 2012-11-27 | 2013-06-05 | 桂林电子科技大学 | High frequency short pulse immersion focusing ultrasonic probe |
| CN103954692A (en) * | 2014-05-06 | 2014-07-30 | 常州市常超电子研究所有限公司 | Reflection type adjustable ultrasonic probe |
| CN104977356A (en) * | 2015-07-31 | 2015-10-14 | 中航复合材料有限责任公司 | Composite material foam structure ultrasonic detection method based on reflection theory |
| CN105004793A (en) * | 2015-07-31 | 2015-10-28 | 中航复合材料有限责任公司 | Ultrasonic testing method used for composite material foaming structures |
| CN106353408A (en) * | 2016-08-26 | 2017-01-25 | 中国科学院声学研究所 | Piezoelectric ultrasonic straight probe |
Non-Patent Citations (1)
| Title |
|---|
| 张光建: "《传感器技术及技能训练》", 31 December 2014, 电子科技大学出版社 * |
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| PB01 | Publication | ||
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Application publication date: 20200602 |