CN105954502B - A kind of radar wave lossless detection method of ancient building pin internal flaw - Google Patents
A kind of radar wave lossless detection method of ancient building pin internal flaw Download PDFInfo
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- CN105954502B CN105954502B CN201610354065.5A CN201610354065A CN105954502B CN 105954502 B CN105954502 B CN 105954502B CN 201610354065 A CN201610354065 A CN 201610354065A CN 105954502 B CN105954502 B CN 105954502B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/46—Wood
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Abstract
A kind of radar wave lossless detection method of ancient building pin internal flaw, radar wave detection device is placed on the starting test point of first unit area, the each unit region in the group is detected one by one upwards by the unit detection zone, and when each unit area is detected, it need to complete a full circumferences scanning, and real-time recording detection data, the collected whole detection datas of set institute, and it is handled and is analyzed, the inside detection image for generating this group of detection zone of pin judges that pin whether there is internal flaw according to image is generated：It is as internal flaw is all not present in all unit areas, then directly qualitative；If any internal flaw, then it is no complete further to judge that the internal flaw having detected that is shown, it is incomplete to display to carry out extending out continuous inspection, until display is complete, finally obtain qualitative detection result.It, which live can rapidly and accurately be detected, whether there is the defects of empty, rotten in ancient building pin, and can determine that position and the size of these defects.
Description
Technical field
The present invention relates to a kind of radar wave lossless detection methods of ancient building pin internal flaw, belong to Wood Science and skill
Art field.
Background technology
The defect condition of load-bearing pin plays the safety of whole timber structure vital in wood-structure old building, holds
Weight pin can directly result in caving in for building when rotten serious, and serious security risk is brought to pedestrian and landmark.
And the safety generaI investigation of previous ancient building pin, mainly judged by the empirical methods such as estimating, tapping, in view of wood-structure old building
Load-bearing pin to be mostly large diameter timber and pin surface have paint colour painting, inside to occur relying on when the defects of rotten, empty more
Empirical method possibly can not be discovered in time, it is difficult to decision structure overall security.For this purpose, developing and using in new ancient building pin
Portion's defect inspection method has great importance, and the lossless detection method for making a general survey of current ancient building pin internal flaw mainly has resistance
Power instrument and measure on stress pulse method, when resistance dynamometer detects at the channel that wooden component inside formation diameter is about 3mm, measure on stress pulse
The hole of diameter about 4mm is formed in the wooden component surface, both the above method category non-destructive testing will not to the security performance of timber structure
It impacts, but for the particularity of part ancient building, also there is an urgent need to a kind of lossless detection methods of complete non-intrusion type.
Invention content
The object of the present invention is to provide a kind of radar wave lossless detection methods of ancient building pin internal flaw, not only can be with
Scene, which is rapidly and accurately detected, whether there is the defects of empty, rotten in ancient building pin, and can determine that cavity, rotten defect
Position and size, to for the protection of wood-structure old building provide data supporting.
To achieve the above object, the present invention takes following design scheme：
A kind of radar wave lossless detection method of ancient building pin internal flaw has a radar wave detection device, by thunder
It is positioned in radar wave detection device up to wave launcher and radar wave receiver, and the two is made to be located at upper and lower same vertical line
On；One group of detection zone is set for pin to be detected, a unit area is included at least in this group of detection zone；It is specific
Method is as follows：
1) radar wave detection device is placed on the starting test point of first unit area, it is upward by the unit detection zone
The each unit region in the group is detected one by one, and when each unit area is detected, need at least complete a complete circle
Week scanning：
A) when carrying out the detection of each unit area, the starting test point of this unit area is marked first and is recorded and is somebody's turn to do
The orientation for originating test point, the radar wave detection device is fitted on pin, is pushed since the starting test point of label
The radar wave detection device is at the uniform velocity around pin one week, until return to the starting test point of the unit area, and it is right one by one in moving
Each test point is scanned detection, and recording detection data；
B) after the detection for completing a unit area, radar wave detection device is moved on into next cellular zone to be detected
Domain, the detection process next round for a that repeats the above steps；
2) the collected whole detection datas of set institute, and handled and analyzed, generate this group of detection zone of pin
Internal detection image；
3) judge that pin whether there is internal flaw in this group of detection zone according to the detection image of generation：
As internal flaw is all not present in all unit areas, then below step 4 is directly gone to；
If any more than one unit area memory in internal flaw, then further judge to lack inside the pin having detected that
It falls into it is shown that no complete：If all display is complete, then continue below step 4；It is incomplete if any showing, then not to these
Unit area where the internal flaw completely shown carries out extending out continuous inspection, until the internal flaw is shown completely, carries out next
Step；
4) qualitative detection result is made.
In the radar wave lossless detection method step 3) of the ancient building pin internal flaw, sentence in the detection image of generation
There are the standards of internal flaw to be for disconnected pin：There is exception, and the exceptions area in the detection image of at least one unit area
The edge in domain is in irregular shape.
The continuous inspection that extends out in the radar wave lossless detection method step 3) of the ancient building pin internal flaw is to be directed to institute
Several adjacent unit regions continue to detect upward or downward for the unit area for stating where internal flaw, until there is a cellular zone
No longer occur in the detection image of domain abnormal.
In the qualitative detection result that the radar wave lossless detection method step 4) of the ancient building pin internal flaw obtains：
If there are internal flaws for pin, then quantity, size, position and the space scale of construction of internal defects are shown or export.
The inspection of each unit area is carried out in the radar wave lossless detection method step 1 of the ancient building pin internal flaw
When survey, a test point is set every 5mm, allows radar wave detection device in the surface moving process of the unit area pin, it is every
1 group of data is then acquired up to a test point.
In the radar wave lossless detection method of the ancient building pin internal flaw, defect dipoles are carried out to pin to be measured
Before, the abnormal area occurred for the detection image of display will carry out true and false judgement, the image for being split column with exclusion.
In the radar wave lossless detection method of the ancient building pin internal flaw, ancient building pin internal flaw is carried out
When Site Detection, one group of detection zone is set in the bottom of ancient building pin first, such as zero defect is judged, then terminates to detect；
Such as judge defective, then continue up to set another group of detection zone, so recycles, until no longer find defect, display or defeated
Go out quantity, size, position and the space scale of construction of the ancient building pin internal flaw.
Detection object-timber of the radar wave lossless detection method of ancient building pin internal flaw of the present invention is a kind of non-
Homogeneous material and make after pin its it is external hold layer with having, if it is desired to which non-intrusion type non-destructive testing completely is previous detection method
It is not easy to realize.The method of the present invention can further discriminate between simultaneously qualitative deficiency simultaneously in detection defect, according to various defects in timber
The characteristics of, the position of the presence of defect and type and defect and size are judged by analyzing reflection of radar wave situation.
The present invention can also effectively analyze the characteristics of various defects in timber while detecting defect, to distinguish not
The defect that need to be handled.
The present invention has many places different compared with some prior arts：Timber is heterogeneous material first；Secondly armored concrete
Presence and the position of reinforcing bar are only detected in the radar wave non-destructive testing patent of plate, and this patent simultaneously can be into one in detection defect
Step is distinguished and qualitative deficiency, according in timber the characteristics of various defects, by analyzing presence of the reflection of radar wave image to defect
And the position and size of type and defect are judged.The two has larger difference.
The advantage of the invention is that：(1) Site Detection is carried out to ancient building pin, historical relic present situation can be kept；(2) to ancient architecture
The non-destructive testing that pin carries out complete non-intrusion type is built, its structure safety is not interfered with；It (3) can be in quantitative display ancient building pin
Quantity, position and the size for the defects of portion is empty, rotten, reliable data supporting is provided for the protection of wood-structure old building.
Description of the drawings
Fig. 1 is that the radar wave testing principle in the radar wave lossless detection method of ancient building pin internal flaw of the present invention shows
It is intended to.
Fig. 2 is judgement effect diagram (a certain area of ancient building pin detection zone of defect in radar wave of the present invention detection
The detection image in domain, is determined to have defect).
Fig. 3 is judgement effect diagram (a certain area of ancient building pin detection zone of defect in radar wave of the present invention detection
The detection image in domain is determined as split column, is not belonging to defect).
Specific implementation mode
As shown in fig.1, the radar wave that the radar wave lossless detection method of ancient building pin internal flaw of the present invention is selected
In detection device, emitting radar waves device and receiver are placed in the detection device above and below and on a vertical line, detect
Radar wave detection device is fitted in pin surface by Cheng Zhong, pushes its radar wave detection device at the uniform velocity around the pin (setting in one week
Radar wave detection device is a unit area around one week detection zone covered of pin) and be completed at the same time on the circumference circle each
The data of collection point acquire, then move up the detection for carrying out next circle (next unit region), and circulating repetition is until need to examine
The region of survey is fully completed detection, passes through reflection of radar wave situation analysis, you can the detection image for forming covering detection zone, according to
It whether there is defect, the existence position of defect and size inside this preliminary judgement historic building fire prevention.
Below in conjunction with the accompanying drawings and specific embodiment is described in further details the present invention.
It is experiment detection object that embodiment 1--, which is about 600 millimeters of A pins with diameter in certain Chinese wood-structure old building,
The first step：The selected region to be detected of A pins, budget include 5 unit areas, the label detection starting on column
Point (is located in the first unit region of bottom), and records orientation；
Second step：Pin diameter is measured, radar non-destructive testing device is opened and radar wave detection is arranged according to pin diameter
Depth；
Third walks：By radar wave non-destructive testing device fitting pin surface, pushed since the starting point of label radar without
Detection device is damaged, keeps radar wave detection device at the uniform velocity and parallel around pin operation, and fixed interval (is moved on the surface of pin
In the process 1 group of data point is acquired every 5mm) acquisition testing data；
4th step：It completes to return to starting point after a week around pin operation, moves up, go to the starting point of next unit area
Continue the detection in next unit region；
5th step：Third step and the 4th step are repeated, until having surveyed 5 unit areas；
6th step：The analysis result of comprehensive each data point can obtain the internal image (ginseng in A pin each units region
See Fig. 2, be the corresponding detection image in a unit area in A pin detection zones)；
7th step：Gather all detection images to be analyzed and determined, it is found that one in A pin detection zones
The centre of a, multiple or whole unit areas is irregular shape (such as Fig. 2 there are the deeper region of color and edge
It is shown), A pins are thus judged there are internal flaw, and the size and location of horizontal area is also intuitive visible；
8th step：Judge whether completely to embody the internal flaw, be such as revealed as internal flaw region upper and
The detection image in next unit region there is no the image for being judged to internal flaw is shown, then terminates to detect, executes next
Step；If at least one layer of the detection image of the upper and lower unit area in the region for being revealed as internal flaw, which shows, internal flaw
Image, then continuation extend out one or more unit areas by the layer and continue to detect, and internal flaw is judged to until no longer showing
Until image, next step is executed；
9th step：Make qualitative detection result；
Tenth step：The region for continuing other detections of selection A pins according to demand repeats the above-mentioned first step to the 9th step
Step, until A pins are completely covered in the region of detection, you can obtain defect size and position of the pin at different height；
11st step：Comprehensive analysis is carried out to defect of the pin at different height, obtains lacking in relatively accurate pin
Sunken size, position and the space scale of construction.
It is experiment detection object that embodiment 2--, which is about 600 millimeters of B pins with diameter in certain Chinese wood-structure old building,
The first step：The selected region to be detected of B pins, budget include 8 unit areas, the label detection starting on column
Point (is located in the first unit region of bottom), and records orientation；
Second step：Pin diameter is measured, radar non-destructive testing device is opened and radar wave detection is arranged according to pin diameter
Depth；
Third walks：By radar wave detection device fitting pin surface, the lossless inspection of radar is pushed since the starting point of label
Device is surveyed, keeps radar wave detection device at the uniform velocity and parallel around pin operation, and fixed interval is (in the surface moving process of pin
In every 5mm acquire 1 group of data point) acquisition testing data；
4th step：It completes to return to starting point after a week around pin operation, moves up, go to the starting point of next unit area
Continue the detection in next unit region；
5th step：Third step and the 4th step are repeated, until having surveyed 8 unit areas；
6th step：The analysis result of comprehensive each data point can obtain the internal image (ginseng in B pin each units region
See Fig. 3, be the corresponding detection image in a unit area in B pin detection zones)；
7th step：Gather all detection images to be analyzed and determined, by figure it can be found that in the centre of B pins,
There are a colors compared with the deep larger region of area simultaneously, common with ancient building because the edges of regions is apparent similar round
Split column (splicing of pin) feature is similar, thus judges that B pins are non-defective for split pin；
8th step：The region for continuing other detections of selection pin according to demand, repeats the above steps, you can detect wood
Whether column has defect comprehensively.Finally, comprehensive analysis obtains relatively accurate judging result.
In the method for the various embodiments described above, the intelligence of manual type or computer can be passed through to the detection image of diagram
Processing is analyzed and determined, can be achieved by the prior art, not repeated herein.
The various embodiments described above can be subject to several variations without departing from the scope of the invention, thus it is above illustrate include and
Structure shown in attached drawing should be regarded as it is illustrative, rather than to limit the protection domain of the application patent.
Claims (6)
1. a kind of radar wave lossless detection method of ancient building pin internal flaw has a radar wave detection device, by radar
Wave launcher and radar wave receiver are positioned in radar wave detection device, and the two is made to be located on upper and lower same vertical line；
One group of detection zone is set for pin to be detected, a unit area is included at least in this group of detection zone；Its feature exists
In setting one group of detection zone in the bottom of ancient building pin first, such as judges zero defect, then terminate to detect；It is as scarce in judged to have
It falls into, then continues up to set another group of detection zone, so recycle, until no longer finding defect, show or export the ancient building
Quantity, size, position and the space scale of construction of pin internal flaw；The specific method is as follows：
1) radar wave detection device is placed on the starting test point of first unit area, upwards one by one by the unit detection zone
Each unit region in the group is detected, and when each unit area is detected, a full circumferences scanning need to be completed：
A) when carrying out the detection of each unit area, the starting test point of this unit area is marked first and records the starting
The orientation of test point fits in the radar wave detection device on pin, and the thunder is pushed since the starting test point of label
Up to wave detection device at the uniform velocity around pin one week, until return to the starting test point of the unit area, and one by one to each inspection in moving
Measuring point is scanned detection, and recording detection data；
B) after the detection for completing a unit area, radar wave detection device is moved on to the starting of next unit area to be detected
Test point, the detection process for a that repeats the above steps, until completing the detection to this group of detection zone；
2) the collected whole detection datas of set institute, and handled and analyzed, generate the inside of this group of detection zone of pin
Detection image；
3) judge that pin whether there is internal flaw in this group of detection zone according to the detection image of generation：
As internal flaw is all not present in all unit areas, then below step 4 is directly gone to)；
If any more than one unit area memory in internal flaw, then further judge that the pin internal flaw having detected that is aobvious
Whether that shows is complete：If all display is complete, then continue below step 4；It is incomplete if any showing, then it is imperfect to these
Unit area where the internal flaw of display carries out extending out continuous inspection, until the internal flaw is shown completely, carries out in next step；
4) qualitative detection result is made.
2. according to the method described in claim 1, it is characterized in that in the step 3), pin is judged in the detection image of generation
Standard there are internal flaw is：There is exception, and the side of the abnormal area in the detection image of at least one unit area
Edge is in irregular shape.
3. according to the method described in claim 1, it is characterized in that the continuous inspection that extends out in the step 3) is to be directed to the inside
Several adjacent unit regions continue to detect upward or downward for unit area where defect, until there is unit area detection
No longer occur in image abnormal.
4. according to the method described in claim 1, it is characterized in that in the qualitative detection result that the step 4) obtains：Such as pin
There are internal flaws, then show or export quantity, size, position and the space scale of construction of internal defects.
5. according to the method described in claim 1, it is characterized in that when carrying out the detection of each unit area in the step 1,
A test point is set every 5mm, allows radar wave detection device in the surface moving process of the unit area pin, often reaches an inspection
Measuring point then acquires 1 group of data.
6. according to the method described in claim 1, it is characterized in that：Before carrying out defect dipoles to pin to be measured, for display
The abnormal area that detection image occurs will carry out true and false judgement, the image for being split column with exclusion.
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| CN109213150B (en) * | 2018-08-01 | 2020-07-14 | 东北林业大学 | Antenna control platform of tree defect nondestructive testing system |
| CN110988872B (en) * | 2019-12-25 | 2023-10-03 | 中南大学 | Rapid identification method for detecting wall health state by unmanned aerial vehicle through-wall radar |
| CN112684433B (en) * | 2020-03-13 | 2024-03-01 | 中国林业科学研究院木材工业研究所 | Correction method for radar imaging of holes in wooden columns of ancient building |
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