CN202066456U - Interlayer strain sensor for asphalt road surface - Google Patents
Interlayer strain sensor for asphalt road surface Download PDFInfo
- Publication number
- CN202066456U CN202066456U CN2011200425003U CN201120042500U CN202066456U CN 202066456 U CN202066456 U CN 202066456U CN 2011200425003 U CN2011200425003 U CN 2011200425003U CN 201120042500 U CN201120042500 U CN 201120042500U CN 202066456 U CN202066456 U CN 202066456U
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- road surface
- bituminous pavement
- sensor
- deformation
- asphalt road
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Abstract
The utility model relates to a displacement sensor, in particular to an interlayer strain sensor for an asphalt road surface which is suitable for detecting interlayer deformation of a compound asphalt road surface, and aims to provide a sensor for detecting interlayer vertical deformation of the asphalt road surface. The interlayer strain sensor for the asphalt road surface comprises a sensing element, a deformation transducing device, a lower fixing component and a data link device, wherein the sensing element is a directional displacement detecting element and is connected with the lower fixing component; the deformation transducing device is used for transmitting a displacement signal sensed by the deformation transducing device to the sensing element, and comprises a telescopic protecting hood with a telescopic function; the telescopic protecting hood can only stretch and retract in the vertical direction; and the data link device is used for transmitting information sensed by the sensing element to other peripheral. The technical scheme is characterized in that the interlayer strain sensor for the asphalt road surface can sense the vertical deformation at a partial position in a certain asphalt layer of the asphalt road surface.
Description
Technical field
The utility model relates to a kind of displacement transducer, is a kind of sensor that detects strain between the composite asphalt supercrust that is applicable to specifically.
Background technology
The bituminous pavement deformation detection is the focus of international road circle research under the traveling load, be research different pitches pavement structure and material rut under the dynamic loads effect produce reason and rule necessary condition.Adopt the built-in type sensor, the interlayer strain of each road surface structare layer of bituminous pavement is the effective means of carrying out the pavement structure Study on dynamic response under the research actual traffic load, but complicated mal-conditions such as the high temperature when being subjected to asphalt pavement construction, high pressure limit, there is the problem that embedding survival rate is low, sensitivity is low in conventional deformation-sensor, is difficult to reach the effect of strain between effective detection layers.This aspect research at present also is in the starting stage at home, and the bituminous pavement interlayer strain transducer of research and development practical is the key of carrying out the experimental study of pavement structure dynamic deformation, also is a present weak link.External corresponding sensor is less, price is also very expensive, and external sensor is used for the measurement of instantaneous microstrain under the dynamic loads effect mostly, be difficult to carry out the accurate measurement of bituminous pavement interlayer moderate finite deformation, and bituminous pavement all can produce 5mm even the rutting deformation more than the 20mm usually under local function.To sum up, the development of the sensor that the interlayer dynamic deformation of asphalt mat, basic unit and resistant strata etc. detects under the traffic loading just seems particularly necessary.
Summary of the invention
The technical problems to be solved in the utility model is: a kind of sensor that can be used for the vertical deformation detection of bituminous pavement interlayer is provided.
The purpose of this utility model can reach by following measure: it comprises that sensor, distortion pass Jie's device, following retaining element and data link device.Wherein sensor is directed displacement detecting element; it links together with following retaining element; described retaining element down is used for the sensor shell is fixed on testers such as bituminous pavement; not because of the flow deformation change of occurrence positions easily of testers such as bituminous pavement; described distortion passes Jie's device and is used for its displacement signal that perceives is passed to sensor; it includes the flexible protective cover that possesses Telescopic; described flexible protective cover can only be flexible at vertical direction; the information transmission that described data link device is used for sensor is perceived is given other external units, generally uses general lead just passable.
To descend retaining element and sensor to bury underground to the sub-layer of brea bed to be measured during installation; to be out of shape biography Jie device is embedded in the brea bed to be measured; to go up stator and be positioned at brea bed end face to be measured; because retaining element was respectively at the end face and the bottom surface of brea bed to be measured under last stator reached; can follow the vertical Free Transform of brea bed end face to be measured and bottom surface; thereby make distortion pass the interlayer strain that Jie's device can obtain brea bed to be measured; described flexible protective cover can play the effect of shade protection simultaneously; avoid high temperature; destructions such as extruding; its Telescopic that has is intended to effectively guarantee moving freely between the stator up and down; guarantee the relative fixed of described sensor shell simultaneously, avoid interference the motion that distortion passes Jie's device.
The characteristics of technique scheme are: the vertical distortion of part position in can a certain brea bed of perception bituminous pavement.
Further: the top of flexible protective cover has been horizontally disposed with stator, is horizontal positioned because go up stator in brea bed, thus responsive to the displacement of vertical direction, and be not subject to the interference of horizontal direction displacement, the distortion of better perception brea bed.When the pitch top layer is detected, described upward stator and asphalt surface can be bonded together, to know its distortion accurately.
Further: the described stator middle part of going up is provided with screw, can allow described distortion pass Jie's device by the bolt that different length is installed and be in different initial positions, to allow described sensor possess different initial values.
Further: described retaining element down has the stator of a circle, ellipse, quadrilateral, polygon or other approximate shapes.Its advantage is simple in structure, and it is easy to process to draw materials.
Further: the described sensor of answering includes the main body protective cover, and the main body protective cover mainly plays the shade protection, avoids destructions such as high temperature, extruding.
Further: described telescoping mechanism at least two hard pipes pivot bush unit successively together, its advantage is to possess the excellent protection supporting role, is difficult for protecting sensitive original paper feeler lever to make its retractable because of the distortion of shearing generation side.
Further: described distortion passes Jie's device and includes resetting means, and resetting means helps to guarantee that distortion passes Jie's device and is in the initial position of going up most when burying this sensor underground.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Fig. 1 is embedded in synoptic diagram in the composite asphalt layer for the utility model embodiment.
Embodiment
Known concrete structure and characteristic are no longer set forth at this in this programme.As shown in Figure 1: the shell 1 of rod-pulling type linear displacement transducer links together by screw thread and disc type fixture 2, and rod-pulling type linear displacement transducer below is provided with lead, and disc type fixture 2 connects together with main body protective cover 3.Induction pull bar 4 peripheries of rod-pulling type linear displacement transducer are provided with telescopic tube 5, its similar telescopic mast, and the top of telescopic tube 5 is provided with stator, is provided with stage clip 6 between induction pull bar 4 and the shell 1.Shell 1, disc type fixture 2 and main body protective cover 3 are embedded in the sub-layer 21, and induction pull bar 4 and telescopic tube 5 are arranged in brea bed 22 to be measured.
What another embodiment was different with the foregoing description is: the described stator center of going up is provided with the countersunk head screw, also have a dormant bolt to pass described countersunk head screw, described dormant bolt will be responded to pull bar 4 and push one centimetre downwards, make the initial output voltage of described rod-pulling type linear displacement transducer be adjusted to analog value, to reach actual needs.
Above-described only is preferred implementation of the present utility model; should be understood that; for a person skilled in the art; under the prerequisite that does not break away from the utility model structure; can also make some distortion and improvement; these also should be considered as protection domain of the present utility model, and these can not influence effect and practical applicability that the utility model is implemented.
Claims (7)
1. bituminous pavement interlayer strain transducer; comprise that sensor and connected distortion pass Jie's device, data link device; it is characterized in that: described sensor is the displacement detecting element; it is connected with following retaining element, and described distortion passes Jie's device and comprises the flexible protective cover that possesses directed Telescopic.
2. bituminous pavement interlayer strain transducer according to claim 1 is characterized in that: the top of described flexible protective cover is provided with the last stator of level.
3. bituminous pavement interlayer strain transducer according to claim 2 is characterized in that: the described stator middle part of going up is provided with screw.
4. according to each described bituminous pavement interlayer strain transducer in the claim 1 to 3, it is characterized in that: described retaining element down comprises an oval or circular stator.
5. bituminous pavement interlayer strain transducer according to claim 4, it is characterized in that: described sensor includes the main body protective cover.
6. bituminous pavement interlayer strain transducer according to claim 5 is characterized in that: described flexible protective cover includes telescopic tube, and it is formed by at least two hard pipes pivot bush unit successively.
7. bituminous pavement interlayer strain transducer according to claim 6 is characterized in that: described distortion passes Jie's device and includes resetting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200425003U CN202066456U (en) | 2011-02-18 | 2011-02-18 | Interlayer strain sensor for asphalt road surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200425003U CN202066456U (en) | 2011-02-18 | 2011-02-18 | Interlayer strain sensor for asphalt road surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202066456U true CN202066456U (en) | 2011-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200425003U Expired - Fee Related CN202066456U (en) | 2011-02-18 | 2011-02-18 | Interlayer strain sensor for asphalt road surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202066456U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928644A (en) * | 2016-06-29 | 2016-09-07 | 中交第二公路勘察设计研究院有限公司 | Strain gauge for monitoring pavement structure |
| CN106644727A (en) * | 2017-02-22 | 2017-05-10 | 长沙理工大学 | Testing device of rigid and flexible composite test piece asphalt layer rebound modulus and method thereof |
| CN107143975A (en) * | 2017-05-05 | 2017-09-08 | 南京慧和建筑技术有限公司 | A kind of capillary pipeline sensor mount |
| CN108534661A (en) * | 2018-03-30 | 2018-09-14 | 山东高速科技发展集团有限公司 | A kind of strain transducer and its application method of monitoring asphalt pavement rut compressive strain |
| CN110081845A (en) * | 2019-05-30 | 2019-08-02 | 福州大学 | Cement pavement morning age three-dimensional full panel warped shapes monitoring device and implementation method |
| CN115045164A (en) * | 2022-04-19 | 2022-09-13 | 四川省交通勘察设计研究院有限公司 | Asphalt strain gauge embedding device and method |
-
2011
- 2011-02-18 CN CN2011200425003U patent/CN202066456U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928644A (en) * | 2016-06-29 | 2016-09-07 | 中交第二公路勘察设计研究院有限公司 | Strain gauge for monitoring pavement structure |
| CN105928644B (en) * | 2016-06-29 | 2018-07-31 | 中交第二公路勘察设计研究院有限公司 | A kind of strain gauge for pavement structure monitoring |
| CN106644727A (en) * | 2017-02-22 | 2017-05-10 | 长沙理工大学 | Testing device of rigid and flexible composite test piece asphalt layer rebound modulus and method thereof |
| CN107143975A (en) * | 2017-05-05 | 2017-09-08 | 南京慧和建筑技术有限公司 | A kind of capillary pipeline sensor mount |
| CN107143975B (en) * | 2017-05-05 | 2022-11-08 | 南京慧和建筑技术有限公司 | Capillary pipeline sensor mounting rack |
| CN108534661A (en) * | 2018-03-30 | 2018-09-14 | 山东高速科技发展集团有限公司 | A kind of strain transducer and its application method of monitoring asphalt pavement rut compressive strain |
| CN110081845A (en) * | 2019-05-30 | 2019-08-02 | 福州大学 | Cement pavement morning age three-dimensional full panel warped shapes monitoring device and implementation method |
| CN110081845B (en) * | 2019-05-30 | 2020-05-08 | 福州大学 | Device for monitoring warping shape of three-dimensional comprehensive plate of cement pavement in early age and implementation method |
| CN115045164A (en) * | 2022-04-19 | 2022-09-13 | 四川省交通勘察设计研究院有限公司 | Asphalt strain gauge embedding device and method |
| CN115045164B (en) * | 2022-04-19 | 2024-04-26 | 四川省交通勘察设计研究院有限公司 | Asphalt strain gauge burying device and method thereof |
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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 |
Granted publication date: 20111207 Termination date: 20200218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |