CN203535014U - Asphalt mixture acoustic emission tester - Google Patents
Asphalt mixture acoustic emission tester Download PDFInfo
- Publication number
- CN203535014U CN203535014U CN201320729088.1U CN201320729088U CN203535014U CN 203535014 U CN203535014 U CN 203535014U CN 201320729088 U CN201320729088 U CN 201320729088U CN 203535014 U CN203535014 U CN 203535014U
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- acoustic emission
- loading
- pair
- loading head
- pedestal
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Abstract
The utility model discloses an asphalt mixture acoustic emission tester which comprises a base, wherein four insulating partitioning plates which are perpendicular to the upper surface of the base are arranged on the base; the insulating partitioning plates are sequentially and adjacently connected together to form a loading space, the cross section of which is square; a top plate covers the top end of the loading space; a hydraulic servo closed loop loading machine is arranged in the loading space; the lower end of the loading head of the hydraulic servo closed loop loading machine is fixedly connected on a support plate parallel to the upper surface of the base; the upper end of the loading head is connected with the top plate through a telescopic connecting rod; a force testing sensor is arranged on the connecting rod; a cylindrical testing piece is arranged in the loading head; a pair of acoustic emission sensors and a pair of displacement sensors are arranged on the outer surface of the testing piece; the acoustic emission sensors, the displacement sensors and the force testing sensors are all connected with an acoustic emission device. The tester has the advantages of reasonable design, accurate measurement and the like, whether the interior of an asphalt mixture is damaged and the size of strain can be accurately confirmed, and a reliable basis is provided for pavement remediation.
Description
Technical field
The utility model relates to a kind of checkout equipment of asphalt fatigure failure, is specifically related to a kind of asphalt acoustic emission detector.
Background technology
Along with the construction of highway, a large amount of highways enter into the maintenance interval, especially bituminous pavement in recent years.Determine whether bituminous pavement needs repairing and the grade of keeping in repair is very important for optimizing resource.Therefore, necessary by the detection of asphalt being determined to whether bituminous pavement destroys.
China's acoustic emission detector is mainly used in concrete road surface and concrete-bridge, is not applied at present the acoustic emission detector that asphalt detects, and does not have way well to determine the destruction of asphalt internal microstructure.
Summary of the invention
Technical problem to be solved in the utility model is to determine that the fatigure failure of asphalt internal microstructure and intensity recovers, provide a kind of simple in structure, easy to operate, be suitable for shop experiment research and Site Detection bituminous pavement destroys and the detector of recovery.
Solving the problems of the technologies described above adopted technical scheme is:
An asphalt acoustic emission detector, comprises pedestal, is provided with the thermal-insulation baffle plate vertical with pedestal upper surface on pedestal, and thermal-insulation baffle plate arranges four sides and in abutting connection with forming xsect, is foursquare loading space successively, loads space top end cover top board is housed;
Load in space and be provided with hydraulic servo closed loop shovel loader, the loading head lower end of hydraulic servo closed loop shovel loader is cemented on a supporting plate parallel with pedestal upper surface, the upper end of loading head is connected with top board by a telescopic connecting link, and force cell is installed on connecting link;
Cylinder specimen is installed in loading head, on test specimen outside surface, is provided with a pair of calibrate AE sensor and a pair of displacement transducer; Calibrate AE sensor, displacement transducer and force cell all be connected to an acoustic emission device.
Further, the line of described a pair of calibrate AE sensor and the line of a pair of displacement transducer are all by the axle center of test specimen and mutually vertical.
The utlity model has reasonable in designly, measure the advantages such as accurate, can determine accurately the size of strain when whether asphalt inside is damaged and is damaged, for road surface, repair reliable basis is provided, and simple in structure, easy to operate.
Accompanying drawing explanation
Fig. 1 is front elevation of the present utility model;
Fig. 2 is the vertical view of test specimen part;
Fig. 3 is vertical view of the present utility model;
Number in the figure representative: 1-acoustic emission device, 2-top board, 3-calibrate AE sensor, 4-connecting link, 5-displacement transducer, 6-force cell, 7-thermal-insulation baffle plate, 8-loading head, 9-supporting plate, 10-pedestal, 11-test specimen;
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Embodiment
Defer to technique scheme, a kind of asphalt acoustic emission detector, comprise pedestal 10, on pedestal 10, be provided with the thermal-insulation baffle plate 7 vertical with pedestal 10 upper surfaces, thermal-insulation baffle plate 7 arranges four sides and in abutting connection with forming xsect, is foursquare loading space successively, loads space top end cover top board 2 is housed;
Load in space and be provided with hydraulic servo closed loop shovel loader, loading head 8 lower ends of hydraulic servo closed loop shovel loader are cemented on a supporting plate 9 parallel with pedestal 10 upper surfaces, the upper end of loading head 8 is connected with top board 2 by a telescopic connecting link 4, and force cell 6 is installed on connecting link 4;
Further, the line of described a pair of calibrate AE sensor 3 and the line of a pair of displacement transducer 5 are all by the axle center of test specimen 11 and mutually vertical.
As shown in Figure 1, Fig. 1 is front section view of the present utility model, in order to show, loads interior volume structure, does not draw positive thermal-insulation baffle plate 7; Fig. 3 is vertical view.
In the present embodiment, displacement transducer 5 adopts the 02560405-000LVDT MHR005ASSY of the U.S. Schaevitz company type sensor that active length is 100mm, the preposition 2001AEDSP-32/16 type of the binary channels device that acoustic emission device 1 WeiPAC company makes, the UTM-25 servo-hydraulic multifunctional material test unit of the Australian IPC company that hydraulic servo closed loop shovel loader is.
Hydraulic servo closed loop shovel loader is arranged on and loads in space, the upper end of its loading head 8 is connected with top board 2 by a telescopic connecting link 4, in 8 pairs of test specimen 11 loading procedures of loading head, the axially loaded of test specimen 11, connecting link 4 is stressed simultaneously, length changes, and the force cell 6 on connecting link 4 can detect the variation of test specimen 11 axial stresses in loading procedure.
Supporting plate 9 is cemented on the inwall of thermal-insulation baffle plate 7, and its effect is that loading head 8 is installed, and the lower end of loading head 8 is cemented on supporting plate 9, makes loading head 8 in loading procedure, keep stable.
When asphalt acoustic emission detection is tested, cylindrical bitumen mixture specimen 11 need to be heated to after uniform temperature, vertically be arranged on and carry out in loading head 8, therefore load space and made by thermal-insulation baffle plate 7, reduce the temperature loss of test specimen 11, the accuracy of warranty test result.In the present embodiment, thermal-insulation baffle plate 7 is comprised of two-layered steel plates and the phenolic-aldehyde heat-insulation board that is filled between steel plate.
When testing, first cylinder specimen 11 is arranged in loading head 8, with epoxide-resin glue, calibrate AE sensor 3 and displacement transducer 5 are bonded in to test specimen 11 surfaces, make the line of two calibrate AE sensors 3 and the line of two displacement transducers 5 is vertical and by test specimen 11 axle center, as shown in Figure 2; Open hydraulic servo closed loop shovel loader, test specimen 11 is carried out to the loading of vertical direction upper stress, control suitable loading speed, displacement transducer 5 and force cell 6 obtain respectively test specimen 11 perpendicular stresses to be changed and change in displacement, and the data of calibrate AE sensor 3 collections pass to simultaneously, and acoustic emission device 1 carries out digital-to-analog conversion, data are preserved and data Graphics Processing.The maximum amplitude drawing after processing according to acoustic emission device 1 determines to fixed vertical strain whether road surface destruction occurs and whether need reparation with institute's stand-down of lower frequency.
Claims (2)
1. an asphalt acoustic emission detector, comprises pedestal (10), it is characterized in that,
On pedestal (10), be provided with the thermal-insulation baffle plate (7) vertical with pedestal (10) upper surface, thermal-insulation baffle plate (7) arranges four sides and in abutting connection with forming xsect, is foursquare loading space successively, loads space top end cover top board (2) is housed;
Load in space and be provided with hydraulic servo closed loop shovel loader, loading head (8) lower end of hydraulic servo closed loop shovel loader is cemented on a supporting plate (9) parallel with pedestal (10) upper surface, the upper end of loading head (8) is connected with top board (2) by a telescopic connecting link (4), and force cell (6) is installed on connecting link (4);
Cylinder specimen (11) is installed in loading head (8), on test specimen (11) outside surface, is provided with a pair of calibrate AE sensor (3) and a pair of displacement transducer (5); Calibrate AE sensor (3), displacement transducer (5) and force cell (6) are all connected to an acoustic emission device (1).
2. asphalt acoustic emission detector as claimed in claim 1, is characterized in that, the line of described a pair of calibrate AE sensor (3) and the line of a pair of displacement transducer (5) be the axle center by test specimen (11) and mutually vertical all.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320729088.1U CN203535014U (en) | 2013-11-15 | 2013-11-15 | Asphalt mixture acoustic emission tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320729088.1U CN203535014U (en) | 2013-11-15 | 2013-11-15 | Asphalt mixture acoustic emission tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203535014U true CN203535014U (en) | 2014-04-09 |
Family
ID=50421209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320729088.1U Expired - Fee Related CN203535014U (en) | 2013-11-15 | 2013-11-15 | Asphalt mixture acoustic emission tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203535014U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527311A (en) * | 2016-01-12 | 2016-04-27 | 中国水利水电科学研究院 | Mass concrete microscopic fracture testing system |
| CN110161116A (en) * | 2018-04-25 | 2019-08-23 | 北京机电工程研究所 | Displacement and sound emission integrated sensing device |
| CN111521686A (en) * | 2020-04-27 | 2020-08-11 | 北京工业大学 | Low-temperature fracture evaluation method for asphalt mixture based on acoustic emission b-value Kalman filtering analysis |
-
2013
- 2013-11-15 CN CN201320729088.1U patent/CN203535014U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527311A (en) * | 2016-01-12 | 2016-04-27 | 中国水利水电科学研究院 | Mass concrete microscopic fracture testing system |
| CN110161116A (en) * | 2018-04-25 | 2019-08-23 | 北京机电工程研究所 | Displacement and sound emission integrated sensing device |
| CN110161116B (en) * | 2018-04-25 | 2021-10-19 | 北京机电工程研究所 | Displacement and acoustic emission integrated sensing device |
| CN111521686A (en) * | 2020-04-27 | 2020-08-11 | 北京工业大学 | Low-temperature fracture evaluation method for asphalt mixture based on acoustic emission b-value Kalman filtering analysis |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20161115 |