CN112129838B - Double-channel defect positioning device - Google Patents
Double-channel defect positioning device Download PDFInfo
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- CN112129838B CN112129838B CN202011179320.XA CN202011179320A CN112129838B CN 112129838 B CN112129838 B CN 112129838B CN 202011179320 A CN202011179320 A CN 202011179320A CN 112129838 B CN112129838 B CN 112129838B
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- 230000007547 defect Effects 0.000 title claims abstract description 41
- 230000007246 mechanism Effects 0.000 claims abstract description 128
- 238000001514 detection method Methods 0.000 claims abstract description 70
- 239000000523 sample Substances 0.000 claims description 36
- 230000033001 locomotion Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 238000013519 translation Methods 0.000 claims description 8
- 230000004807 localization Effects 0.000 claims description 7
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
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- 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
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0232—Glass, ceramics, concrete or stone
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
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- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a double-channel defect positioning device, which comprises a fixing mechanism, a first moving mechanism, a second moving mechanism and a flaw detection mechanism, wherein the fixing mechanism is used for fixing the double-channel defect positioning device on a target object to be detected, the first moving mechanism is arranged on the U-shaped bottom of the fixing mechanism, and the second moving mechanism is arranged on the first moving mechanism; the flaw detection mechanism is arranged on the second moving mechanism, and the first moving mechanism and the second moving mechanism are used for controlling the whole flaw detection mechanism to translate in different directions in the detection area.
Description
Technical Field
The invention relates to the technical field of building defect positioning machinery, in particular to an automatic defect detection positioning device for a building beam.
Background
Many times, the safety condition of the building concrete needs to be monitored and detected, and defects of cracks, leakage, calcium precipitation, exposed ribs, damage and the like affecting the safety of the concrete structure can be timely found in the detection of the concrete. At present, most of defect detection on building beams is carried out manually by using an ultrasonic detection method, and mechanical devices such as mechanical arms are adopted to simulate hands to detect the building beams, and both methods are carried out manually, so that the problems that time and labor are consumed in detection, defect details and development processes are difficult to control and the like are unavoidable, the detection workload of a handheld transducer for an operator is large, the detection cannot be completed on time generally, and each detection is extremely inconvenient for the operator and has danger, the detection precision cannot meet the requirement, and the detection is easily influenced by environmental factors; the latter adopts mechanical device to replace the staff, has reduced operator's work load to a great extent, but the scope of every detection is less and detects the device that needs the operator to remove again, and the detection time is also very long.
In the prior art, the two detection modes can only detect that the building beam has defects, but cannot accurately position the defect positions.
Disclosure of Invention
Aiming at the problems of the detection method, the invention provides a binaural defect positioning device and a fixing device thereof, which can detect the defects of a girder by mechanical automation and can realize accurate positioning of the defects.
The invention provides a double-channel defect positioning device which comprises a fixing mechanism, a first moving mechanism, a second moving mechanism and a flaw detection mechanism, wherein the fixing mechanism is used for fixing the double-channel defect positioning device on a target object to be detected, the fixing mechanism is a U-shaped bracket, and the first moving mechanism is arranged on the U-shaped bottom of the fixing mechanism and is responsible for moving in a first direction; the second moving mechanism is arranged on the first moving mechanism and is responsible for moving in the second direction perpendicular to the first direction, the flaw detection mechanism is arranged on the second moving mechanism and comprises two groups of upright posts which are oppositely arranged, a support post capable of sliding along the length direction of each group of upright posts is arranged between each group of upright posts, a binaural ultrasonic transmitting end probe in the binaural defect positioning device is arranged on one support post, a binaural ultrasonic receiving end probe in the binaural defect positioning device is arranged on the other support post, and meanwhile, the flaw detection mechanism can move along the first direction and the second direction under the driving of the first moving mechanism and the second moving mechanism.
Preferably, the fixing mechanism further comprises long bolts arranged at two ends above the U-shaped support, and the long bolts are used for fixing the binaural defect positioning device on the object to be detected.
Preferably, the first moving mechanism comprises a first fixing plate, two first guide rails and a first sliding block, the fixing plate is arranged on the U-shaped bottom of the fixing mechanism, the first guide rails are arranged on the fixing plate, and the first sliding block is placed on the first guide rails and used for controlling the second moving mechanism to translate in the front-back direction.
Preferably, the second moving mechanism comprises a second fixing plate, two second guide rails and a second sliding block, wherein the second fixing plate is arranged on the first sliding block, the second guide rails are arranged on the fixing plate, and the second sliding block is arranged on the second guide rails and used for controlling the flaw detection mechanism to translate in the left-right direction.
Preferably, the flaw detection mechanism further comprises four third guide rails, third sliding blocks, two support posts and four fourth sliding blocks, wherein each third guide rail is arranged on the side face of the upright post in the vertical direction, the third sliding blocks are arranged on the third guide rails, each fourth sliding block is provided with a binaural ultrasonic wave transmitting end or receiving end probe, and each binaural ultrasonic wave transmitting end or receiving end probe is arranged on the opposite face of each two support posts in a group, and is used for placing two groups of binaural ultrasonic wave transmitting ends or receiving end probes. Each transmitting end probe and each receiving end probe form an ultrasonic channel for detection, and the two groups of double-channel ultrasonic probes work on the same plane in a time-sharing mode according to a detection method to find out the specific position of the defect.
Preferably, when the flaw detection mechanism detects in a plane, the two groups of probes only move in parallel in the plane, and the movement of the two groups of probes can be controlled according to a set method.
Preferably, the third slider and the third guide rail control the probe of the ultrasonic receiving end or the ultrasonic transmitting end to translate in the vertical direction.
Preferably, the first guide rail, the second guide rail and the third guide rail further comprise stop blocks, and the stop blocks are arranged at two ends of the guide rails.
The sliding blocks can stop moving after touching the stop blocks so as to limit the sliding blocks to move in a translational mode on the guide rails, unrestricted movement of the mechanisms is avoided, and meanwhile, the translational range of each sliding block on the guide rails can be controlled through the position of the stop blocks so as to limit the movement of each mechanism.
The beneficial effects of the invention are as follows:
1. The whole device can be fixed on a house beam, and automatic and rapid detection is realized in different areas within the range of a fixing mechanism;
2. The vertical up-down translation of the probe can be controlled in the flaw detection mechanism, and the probe moves on different planes of the area, so that the comprehensive detection of the flaws in the area is realized;
3. The double-channel defect positioning device not only can automatically detect and reduce the workload of operators, but also has wide detection area each time and shortens the detection time of one room beam.
Drawings
FIG. 1 is a two-channel defect localization apparatus;
FIG. 2 is a schematic view of a securing mechanism;
FIG. 3 is a schematic view of a first movement mechanism;
FIG. 4 is a schematic diagram of a flaw detection mechanism;
Wherein: 10 is a fixing mechanism, 20 is a first moving mechanism, 30 is a second moving mechanism, 40 is a flaw detection mechanism, 11 is a fixing bracket, 12 is a long bolt, 21 is a first fixing plate, 22 is a first guide rail, 23 is a first slide block, 31 is a second fixing plate, 32 is a second guide rail, 33 is a third slide block, 41 is a stand column, 42 is a third guide rail, 43 is a support column, 44 is a third slide block, 45 is a fourth slide block, and 46 is a stop block.
Detailed Description
The present invention will be described in detail below with reference to the specific embodiments shown in the drawings, but these embodiments are not limited to the present invention, and structural, method, or functional modifications made by those skilled in the art based on these embodiments are included in the scope of the present invention.
As shown in fig. 1, the present invention provides a binaural defect positioning device and a fixing device thereof, wherein the binaural defect positioning device comprises a fixing mechanism 10, a first moving mechanism 20, a second moving mechanism 30, and a flaw detection mechanism 40, wherein the fixing mechanism 10 is used for fixing the binaural defect positioning device, the first moving mechanism 20 is arranged on the fixing mechanism 10, the first moving mechanism 20 is responsible for moving in a first direction, and the second moving mechanism 30 is arranged above the first moving mechanism and is responsible for moving in a second direction perpendicular to the first direction; the flaw detection mechanism 40 is provided on the second movement mechanism 20.
As shown in fig. 2, the fixing mechanism 10 includes a fixing bracket 11 and a long bolt 12, the fixing bracket 11 is in a U-shaped structure, and the long bolt 12 is arranged at the top of two ends of the fixing bracket 11 to fix the whole defect positioning device, the weight borne by the fixing mechanism 10 exceeds the whole defect positioning device, the fixing mechanism 10 can fix the whole device, and the whole defect positioning device cannot move in the detection process.
As shown in fig. 3, the first moving mechanism 20 includes a first fixing plate 21, two first guide rails 22, and a first slider 23, where the fixing plate 21 is disposed on the fixing bracket 11, the two first guide rails 22 are disposed on the fixing plate 21, and the first slider 23 is disposed on the first guide rails 22 to control the forward and backward translation of the second moving mechanism 30. The second moving mechanism 30 is disposed on the first slider 23 of the first moving mechanism 30, and as shown in fig. 4, the second moving mechanism 30 includes a second fixing plate 31, two second rails 32, and a second slider 33, where the structure of the second moving mechanism 30 is the same as that of the first moving mechanism 20, and the second moving mechanism 30 controls the whole flaw detection mechanism 40 to translate in the left-right direction on the second rails 32.
As shown in fig. 4, the flaw detection mechanism 40 is disposed on the second slider of the second moving mechanism, and includes four upright posts 41, four third guide rails 42, two support posts 43, a third slider 44, and a fourth slider 45, where each upright post 41 is disposed on the slider of the second moving mechanism 30, each third guide rail 42 is disposed on a side surface of the upright post 41 in a vertical direction, the third slider 44 is disposed on the third guide rail 42, between the upright posts 41 on the same side of the different second guide rails 32, one support post is disposed to connect the third slider 44 on the two upright posts 41, and a fourth slider 45 is disposed on a side surface of the support post in a direction facing the flaw detection mechanism 40, so as to place a detection device of a dual-channel flaw positioning device, where the detection device includes two sets of dual-channel ultrasonic receiving end or transmitting end probes, each set of ultrasonic transmitting end probes and receiving end probes form a path of ultrasonic detection signal, and the two sets of probes work on the same plane according to a corresponding detection method in a time sharing manner.
The flaw detection mechanism 40 is controlled by the first moving mechanism 20 and the second moving mechanism 30 to detect flaws in the region. The first translation mechanism 20 is used for controlling the transmitting end and the receiving end to cling to the substance to be detected, the first translation mechanism 20 automatically and slowly approaches to the substance to be detected when detecting, and the third slide block 44 and the third guide rail 42 automatically leave the plane after detecting, so that the probe can translate in the vertical direction, the transmitting and receiving probes are controlled to move on the upper and lower planes of the detection area, and after each time one plane of the detection area is detected, the first translation mechanism 20 exits from the detection plane, and the third slide block 44 automatically moves upwards or downwards.
Wherein, all guide rail both ends that use in the whole fixing device still include all to be provided with dog 46, and the slider on all guide rails can stop moving after touching dog 46 to the translation motion of restriction slider on the guide rail avoids the unlimited motion of mechanism can be through setting up the position of dog 46 simultaneously, and the translation scope on the guide rail of every mechanism of control is in order to realize the restriction to each mechanism motion.
The specific operation mode is as follows: the flaw detection mechanism 40 detects flaws in the length range of the second guide rail 32 by adjusting the appropriate guide rail lengths of the first moving mechanism 20 and the second moving mechanism 30 according to the range of the detection beam, and the fixing mechanism 10 fixes the whole device on the beam.
And moving the flaw detection mechanism 40 to the leftmost end of the whole second guide rail 32, and moving two groups of probes in the flaw detection mechanism 40 to place the positions of the two groups of probes according to the scales on the mechanism and the corresponding detection method.
The first moving mechanism 20 is utilized to keep the two groups of probes away from the surface to be detected of the house beam, then the third guide rail 42 is utilized to move the two groups of probes to the top end of the whole flaw detection mechanism 40, an operator coats the couplant on the plane of the area, and the first moving mechanism 20 is utilized to move the probes close to the surface to be detected, on which the couplant is coated, of the house beam to detect the house beam.
When the flaw detection mechanism 40 detects in a plane, the two groups of probes only move in parallel in the plane, and an operator can control the movement of the two groups of probes according to a self-set method.
After each plane is detected by the flaw detection mechanism 40, an operator can determine the position of each detection according to a set method, and after the detection of the plane is finished, the first moving mechanism 20 and the second moving mechanism 30 control the flaw detection mechanism 40 to move to the other plane in the area until the detection of the whole area is finished. Similarly, after the detection of the area is completed, the first moving mechanism 20 and the second moving mechanism 30 control the flaw detection mechanism 40 to move toward the other area until all the areas of the fixing mechanism 10 are detected. The operator needs to disassemble the fixing mechanism 10, move to another position of the roof beam, fix again, and then perform a new round of detection.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims (7)
1. A binaural defect positioning device is characterized in that: the double-channel defect positioning device comprises a fixing mechanism, a first moving mechanism, a second moving mechanism and a flaw detection mechanism, wherein the fixing mechanism is used for fixing the double-channel defect positioning device on a target object to be detected, the fixing mechanism is a U-shaped bracket, and the first moving mechanism is arranged on the U-shaped bottom of the fixing mechanism and is responsible for moving in a first direction; the second moving mechanism is arranged on the first moving mechanism and is responsible for moving in a second direction perpendicular to the first direction, the flaw detection mechanism is arranged on the second moving mechanism and comprises two groups of upright posts which are oppositely arranged, a support post capable of sliding along the length direction of each upright post is arranged between each group of upright posts, a binaural ultrasonic transmitting end probe in the binaural defect positioning device is arranged on one support post, a binaural ultrasonic receiving end probe in the binaural defect positioning device is arranged on the other support post, and meanwhile, the flaw detection mechanism can move along the first direction and the second direction under the driving of the first moving mechanism and the second moving mechanism;
The first moving mechanism comprises a first fixed plate, two first guide rails and a first sliding block, wherein the first fixed plate is arranged on the U-shaped bottom of the fixed mechanism, the first guide rails are arranged on the first fixed plate, and the first sliding block is placed on the first guide rails and used for controlling the second moving mechanism to translate in the front-back direction;
The second moving mechanism comprises a second fixed plate, two second guide rails and a second sliding block, the second fixed plate is arranged on the first sliding block, the second guide rails are arranged on the first fixed plate, and the second sliding block is arranged on the second guide rails and used for controlling the flaw detection mechanism to translate in the left-right direction;
The flaw detection mechanism further comprises four third guide rails, third sliding blocks, two support posts and four fourth sliding blocks, wherein the vertical direction of each third guide rail is arranged on the side face of each upright post, the third sliding blocks are arranged on the third guide rails, each fourth sliding block is provided with a binaural ultrasonic transmitting end or receiving end probe, and each two of the four sliding blocks are respectively arranged on the opposite faces of the two support posts and used for placing two groups of binaural ultrasonic transmitting ends or receiving end probes.
2. A binaural defect localization apparatus as claimed in claim 1, characterized in that: the fixing mechanism further comprises long bolts arranged at two ends above the U-shaped support and used for fixing the binaural defect positioning device on an object to be detected.
3. A binaural defect localization apparatus as claimed in claim 1, characterized in that: the third sliding block and the third guide rail control the probe of the ultrasonic receiving end or the ultrasonic transmitting end to translate in the vertical direction.
4. A binaural defect localization apparatus as claimed in claim 1, characterized in that: the first guide rail, the second guide rail and the third guide rail are further provided with stop blocks, and the stop blocks are arranged at two ends of the guide rail.
5. A binaural defect localization apparatus as claimed in claim 4, characterized in that: by setting the position of the stop on the guide rail, the translation range of each slide on the guide rail can be controlled.
6. A binaural defect localization apparatus as claimed in claim 1, characterized in that: each transmitting end probe and each receiving end probe form an ultrasonic channel for detection, and the two groups of double-channel ultrasonic probes work on the same plane in a time-sharing mode according to a detection method to find out the specific position of the defect.
7. A binaural defect localization apparatus according to claim 6, characterized in that: when the flaw detection mechanism detects in a plane, the two groups of probes only move in parallel in the plane, and the movement of the two groups of probes can be controlled according to a set method.
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CN112129838B true CN112129838B (en) | 2024-06-21 |
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CN114563480B (en) * | 2022-04-28 | 2022-07-15 | 四川蜀工公路工程试验检测有限公司 | Road concrete structure strength detection device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104101646A (en) * | 2014-08-04 | 2014-10-15 | 吉林大学 | Automatic ultrasonic flaw detector |
CN110320283A (en) * | 2019-07-04 | 2019-10-11 | 江阴兴澄特种钢铁有限公司 | A kind of binary channels probe regulating mechanism and binary channels are popped one's head in the method for detection of water logging high-frequency ultrasonic |
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US7506547B2 (en) * | 2004-01-26 | 2009-03-24 | Jesmonth Richard E | System and method for generating three-dimensional density-based defect map |
CN102818844B (en) * | 2012-07-25 | 2014-11-26 | 中国石油集团渤海石油装备制造有限公司 | Transverse wave detection method for defects of spiral weld steel pipe body and flaw detection apparatus used in same |
CN104865316B (en) * | 2015-04-23 | 2017-12-05 | 同济大学 | A kind of unilateral air coupling ultrasonic scanned imagery device |
CN106226388A (en) * | 2016-08-30 | 2016-12-14 | 江苏精棱铸锻股份有限公司 | A kind of forging carrying out flaw detection device |
CN108742158A (en) * | 2018-08-16 | 2018-11-06 | 杭州道森科技有限公司 | A kind of Multi-freedom-degreemanipulator manipulator |
CN210834782U (en) * | 2019-10-16 | 2020-06-23 | 浙江泛华工程咨询有限公司 | Ultrasonic rebound detector |
CN211206362U (en) * | 2019-11-25 | 2020-08-07 | 天津海运职业学院 | Automatic liquid immersion ultrasonic detection frame for small workpiece |
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104101646A (en) * | 2014-08-04 | 2014-10-15 | 吉林大学 | Automatic ultrasonic flaw detector |
CN110320283A (en) * | 2019-07-04 | 2019-10-11 | 江阴兴澄特种钢铁有限公司 | A kind of binary channels probe regulating mechanism and binary channels are popped one's head in the method for detection of water logging high-frequency ultrasonic |
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