CN115468593A - Equipment for detecting compressive capacity of pavement buried sensor - Google Patents

Equipment for detecting compressive capacity of pavement buried sensor Download PDF

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Publication number
CN115468593A
CN115468593A CN202211312635.6A CN202211312635A CN115468593A CN 115468593 A CN115468593 A CN 115468593A CN 202211312635 A CN202211312635 A CN 202211312635A CN 115468593 A CN115468593 A CN 115468593A
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pressure head
base
circular
test piece
sensor
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CN202211312635.6A
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Chinese (zh)
Inventor
赵永利
李照成
韩东东
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Southeast University
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Southeast University
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Priority to CN202211312635.6A priority Critical patent/CN115468593A/en
Publication of CN115468593A publication Critical patent/CN115468593A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/06—Special adaptations of indicating or recording means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/06—Special adaptations of indicating or recording means
    • G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention discloses a device for detecting the compressive capacity of a buried road sensor, which relates to the technical field of road sensors. This detection equipment of underground sensor compressive capacity in road surface can carry out three test piece and detect in proper order, satisfies simultaneously and carries out the upper surface and local unfavorable point to the sensor test piece and carry out the compression test, has left out the step that later stage manual work inspection sunken fracture and sensor pull strain test, and save time improves detection efficiency, has improved the safety in utilization and the data reliability of sensor.

Description

Equipment for detecting compressive capacity of pavement buried sensor
Technical Field
The invention relates to the technical field of pavement sensors, in particular to a device for detecting the compressive capacity of a pavement buried sensor.
Background
With the continuous development of computer and sensor technologies, various sensors are gradually embedded into a road surface structure in the road construction process to acquire various data and traffic parameters of the road surface structure during operation, and further road intellectualization is promoted. The pressure resistance test is needed before the sensor is buried, and because the evaluation indexes and the evaluation system of the buried asphalt pavement sensor are not perfect, most of the existing pressure tests adopt a pressurizing barrel for testing.
At present, when the compression resistance test is being carried out to the pressurization bucket, put into the bucket with whole sensor test piece usually and pressurize, this kind of pressurization mode can only test the whole compressive strength of sensor, in road surface compaction process, the upper surface damage that often appears or local point contact atress damage, research shows, when bituminous paving is under construction, because the compaction of road roller, lead to burying ground the sensor and can receive great load, and, the contact stress that receives of the upper surface of sensor encapsulation at the same moment is 7 to 10 times that receives the contact stress of lower surface.
Because the actual asphalt mixture is not a homogeneous body, the coarse aggregate often applies great concentrated stress to the buried sensor in a small contact range in the compaction process, the problems cannot be well solved by adopting the pressurizing barrel to carry out uniform pressurizing test, vibration factors are not considered in the pressurizing barrel test, after the test, the problems such as cracking and sinking of the test piece need to be judged manually, the subjectivity is strong, and therefore, the test method for testing the pressure resistance by adopting the pressurizing barrel alone needs to be improved.
Disclosure of Invention
The invention aims to provide a device for detecting the compressive capacity of a buried road sensor, which is used for carrying out pressure test on a damaged surface and a damaged point from the actual road construction, further solving the problems of low self survival rate and low data reliability of the current buried sensor, accelerating the detection efficiency as much as possible and improving the detection quality.
The technical purpose of the invention is realized by the following technical scheme:
a detection device for the compressive capacity of a pavement buried sensor comprises a base and an external control console arranged outside the base, wherein the base is provided with a detection device for the compressive capacity of the pavement buried sensor
The test device comprises a circular experiment frame, a base and a test piece clamping mechanism, wherein the circular experiment frame is used for clamping and fixing a test piece, the test piece is clamped in the circumferential direction of the circular experiment frame and is provided with a plurality of groups, and the circular experiment frame is parallel to a horizontal plane, is connected to the base and can rotate and transversely move on the base;
the pressure head assembly is connected to the base in a lifting mode towards the circular experiment frame and used for applying test pressure to the test piece;
the digital speckle scanner is fixed on one side of the base, the data scanning surface faces towards the test piece clamped by the circular experiment frame, and the digital speckle scanner is used for acquiring a state image of the test piece;
the pressure head assembly is connected with the base and the external controller through leads.
Further setting: the base is fixed with a plurality of vertical support columns arranged in the vertical direction, the vertical support columns are provided with a top plate, the pressure head assembly is arranged on the top plate, and a steel strand is further arranged between the pressure head assembly and the top plate.
Further setting: the pressure head subassembly includes the cuboid pressure head, and cuboid pressure head internal rotation is connected with the cylinder pressure head, and one side of cylinder pressure head is equipped with the concentrated load pressure head, and concentrated load pressure head straight line direction distributes in cylinder pressure head side, and the cylinder pressure head can rotate in the cuboid pressure head.
Further setting: a pressure sensor is arranged on the contact surface of the cylindrical pressure head and the test piece, a pressure sensor II is arranged on the concentrated load pressure head and used for detecting the pressure applied to the test piece, and the pressure sensor I and the pressure sensor II are connected with the base through a lead.
Further setting: the circular experiment frame comprises a circular stainless steel rod piece, the middle position of the circular stainless steel rod piece is parallel to the horizontal plane, two ends of the circular stainless steel rod piece are connected with a circular rotating disk, and a plurality of clamping grooves which are arranged around the outer edge of the circular rotating disk and penetrate through the circular rotating disk are formed in the circular rotating disk and used for clamping and fixing the test piece.
Further setting: the number of the clamping grooves is three, the cross section of each clamping groove is rectangular, two parallel fixed steel supports are arranged on the base, and the circular stainless steel rod piece is connected between the two fixed steel supports.
Further setting: the base rear side is connected through No. two wires with external control platform, is equipped with the display screen on the external control platform, and the bottom of external control platform is equipment control district, and external control platform back is equipped with the wire preformed hole.
Further setting: the digital speckle scanner is provided with a camera which is arranged towards one side of the circular experimental frame.
In conclusion, the invention has the following beneficial effects:
1. in the invention, a sensor test piece is fixed on circular experiment frames at two sides, a lead of the sensor test piece is connected into an external control console, the circular experiment frame is transversely moved by operating the control console, the outer side of the circular experiment frame is tightly attached to the inner side of a flange of the sensor test piece, a certain amount of pressure is applied to the flange, the numerical value of the numerical value is output on a display of the control console, three sensor test pieces can be simultaneously arranged at one time, and the strain value of the test piece is obtained;
2. in the invention, during operation, the circular experiment frame rotates anticlockwise, after the digital speckle scanner at the front side finishes the first scanning of a first test piece, the test piece is rotated right above, the pressure head applies impact load, the cylindrical pressure head rotates ninety degrees and applies the impact load again, meanwhile, the digital speckle scanner finishes the first scanning of a second test piece, and when a third test piece is loaded, the test result of the first test piece can be obtained through the display;
3. the invention has higher automation degree, the experimental equipment can detect three test pieces at one time, which is beneficial to improving the working efficiency, the numerical value of the applied pressure can be intuitively obtained on the display through the pressure sensor on the surface of the pressure head, the test tests on the vulnerable surface and the vulnerable point are respectively simulated through rotating the cylindrical pressure head, compared with the test of a pressurizing barrel, the safety of the test piece in later use can be ensured, the problems of surface cracking, dent and the like after the test piece is loaded are quantitatively evaluated through using the digital speckle technology, the workload of the testing personnel is reduced, the subjective errors of different testing personnel are avoided, the strain value of the test piece can be obtained in the whole test process, and the reliability of the data obtained in the later use process of the test piece can be ensured through observing the numerical curve of the strain value in the test and after the test.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a circular experimental framework structure according to the present invention;
FIG. 3 is a schematic view of the ram configuration of the present invention;
fig. 4 is a simplified diagram of a digital speckle scanner of the present invention.
In the figure, 1, a base; 2. a support; 3. a digital speckle scanner; 4. fixing a steel support; 5. a camera; 6. a circular stainless steel rod member; 7. a circular experimental frame; 8. a circular rotating disc; 9. a card slot; 10. a vertical support column; 11. a top plate; 12. steel strand wires; 13. a ram assembly; 14. a cuboid indenter; 15. a cylindrical press head; 16. a concentrated load pressure head; 17. a first pressure sensor; 18. a second pressure sensor; 19. a first conductive line; 20. a second lead; 21. an external console; 22. a display screen; 23. a device control area.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
The technical scheme adopted by the invention is as follows:
the utility model provides a detection equipment of road surface buried sensor compressive capacity, as shown in fig. 1 to 3, includes base 1, and base 1 lower part is fixed with four supports 2, and 1 upper portion fixed mounting digital speckle scanner 3 of base and fixed steel support 4, as shown in fig. 4, 3 internally mounted of digital speckle scanner have camera 5 for acquire test piece state image.
As shown in fig. 1 to 3, a circular stainless steel rod member 6 parallel to the horizontal plane is arranged between the fixed steel support 4, the fixed steel support 4 is welded with the circular stainless steel rod member 6, a circular experiment frame 7 capable of moving transversely and rotating is mounted on the circular stainless steel rod member 6, and the circular experiment frame 7 is connected to the base 1 in parallel to the horizontal plane and used for clamping and fixing a test piece.
As shown in fig. 1 to 3, three circular rotating disks 8 are arranged inside the circular experiment frame 7, three clamping grooves 9 are arranged inside the circular rotating disks 8, and the cross section of each clamping groove 9 is rectangular. The circular rotating disk 8 rotates to make the digital speckle scanner 3 obtain a complete image.
Base 1 upper portion fixed mounting vertical support post 10, vertical support post 10's upper surface sets up roof 11, and roof 11 passes through steel strand wires 12 and is connected with pressure head subassembly 13, and pressure head subassembly 13 includes cuboid pressure head 14, and the 14 internal rotations of cuboid pressure head are connected with cylinder pressure head 15, and cylinder pressure head 15 can be rotatory in cuboid pressure head 14. The surface of the cylindrical pressure head 15 is provided with a concentrated load pressure head 16, and the concentrated load pressure heads are distributed on the side surface of the cylindrical pressure head 15 in the linear direction.
The position of the concentrated load pressure head 16 is changed by the cylindrical pressure head 15 through rotation, a first pressure sensor 17 and a second pressure sensor 18 are arranged on the lower surface of the cylindrical pressure head 15 and the surface of the concentrated load pressure head 16, and the first pressure sensor 17 and the second pressure sensor 18 are connected with the base 1 through a first lead 19.
An external control console 21 is arranged outside the base 1, the rear side of the base 1 is connected with the external control console 21 through a second lead 20, a display screen 22 is arranged on the external control console 21, the bottom of the external control console 21 is an equipment control area 23, and a lead preformed hole is formed in the back of the external control console 21.
The specific implementation mode is as follows:
the equipment for detecting the compressive capacity of the pavement buried sensor is characterized in that three sensors to be tested are sequentially fixed on a clamping groove 9 in a circular experiment frame 7, a sensor lead is connected to an external control table 21, the transverse position of the circular experiment frame 7 is adjusted to enable a display to obtain tensile strain data, an equipment control area 23 is operated, a digital speckle scanner 3 is enabled to scan the surface of a first test piece for the first time by rotating a circular rotating disc 8, the circular experiment frame 7 is rotated to scan a second rod piece, meanwhile, a cylindrical pressure head 15 of a pressure head assembly 13 applies load to the test piece, and the cylindrical pressure head 15 is rotated to enable a concentrated load pressure head 16 to vertically face downwards;
and (3) loading again, rotating the circular rotating disk 8 again, repeating the loading process, scanning the surface of the first test piece for the second time by the digital speckle scanner 3 when the first test piece returns to the initial position, analyzing by the external control console 21 to obtain a test result of the test piece, displaying on the display screen 22, and ending the experiment when a detection result of the third test piece is obtained.
The invention can sequentially detect three test pieces, simultaneously meets the requirement of carrying out compression resistance test on the upper surface and local unfavorable points of the sensor test piece, omits the steps of later manual detection of pit cracking and sensor tensile strain test, saves time, improves detection efficiency, and improves the use safety and data reliability of the sensor.
The present invention is not intended to be limited to the above embodiments, and any simple modifications, equivalent changes and modifications made by the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims (8)

1. The utility model provides a detection equipment of road surface buried sensor compressive capacity, includes base (1) and outside locating base (1) outside external control platform (21), its characterized in that: the base (1) is provided with
The test bed comprises a circular experiment frame (7) used for clamping and fixing a test piece, wherein the test piece is clamped in the circumferential direction of the circular experiment frame (7) and is provided with a plurality of groups, and the circular experiment frame (7) is parallel to a horizontal plane, is connected to the base (1), and can rotate and transversely move on the base (1);
the pressure head assembly (13) is connected to the base (1) in a lifting mode towards the circular experiment frame (7) and is used for applying test pressure to the test piece;
the digital speckle scanner (3) is fixed on one side of the base (1), and a data scanning surface faces to a test piece clamped by the circular experiment frame (7) and is used for acquiring a test piece state image;
the pressure head assembly (13) is connected with the base (1) and the external controller through leads.
2. The device for detecting the compressive capacity of the buried road sensor according to claim 1, wherein: the base (1) is fixed with a plurality of vertical support columns (10) arranged in the vertical direction, the vertical support columns are provided with a top plate (11), the pressure head assembly (13) is arranged on the top plate (11), and a steel strand (12) is further arranged between the pressure head assembly and the top plate.
3. The device for detecting the compressive capacity of the buried road sensor according to claim 2, wherein: pressure head subassembly (13) include cuboid pressure head (14), and cuboid pressure head (14) internal rotation is connected with cylinder pressure head (15), and one side of cylinder pressure head (15) is equipped with the concentrated load pressure head, and concentrated load pressure head rectilinear direction distributes in cylinder pressure head (15) side, and cylinder pressure head (15) can be rotatory in cuboid pressure head (14).
4. The device for detecting the compressive capacity of the buried road sensor according to claim 3, wherein: the device is characterized in that a first pressure sensor (17) is arranged on the contact surface of the cylindrical pressure head (15) and the test piece, a second pressure sensor (18) is arranged on the concentrated load pressure head and used for detecting the pressure applied to the test piece, and the first pressure sensor and the second pressure sensor (18) are connected with the base (1) through a first lead (19).
5. The equipment for detecting the compressive capacity of the buried road sensor according to claim 1, characterized in that: circular experiment frame (7) include that intermediate position is on a parallel with the circular stainless steel member (6) of horizontal plane, and circular stainless steel member (6) both ends are connected with circular rotary disk (8), are equipped with a plurality of on circular rotary disk (8) and encircle its outer fringe setting and run through draw-in groove (9) of circular rotary disk (8) for the fixed test piece of joint.
6. The equipment for detecting the compressive capacity of the buried road sensor according to claim 5, characterized in that: the number of the clamping grooves (9) is three, the cross section of each clamping groove (9) is rectangular, two fixing steel supports (4) and (2) which are parallel to each other are arranged on the base (1), and the circular stainless steel rod pieces (6) are connected between the two fixing steel supports (4) and (2).
7. The device for detecting the compressive capacity of the buried road sensor according to claim 1, wherein: base (1) rear side with external control platform (21) are connected through No. two wire (20), be equipped with display screen (22) on external control platform (21), the bottom of external control platform (21) is equipment control district (23), external control platform (21) back is equipped with the wire preformed hole.
8. The device for detecting the compressive capacity of the buried road sensor according to claim 1, wherein: the digital speckle scanner (3) is provided with a camera (5), and the camera (5) is arranged towards one side of the circular experiment frame (7).
CN202211312635.6A 2022-10-25 2022-10-25 Equipment for detecting compressive capacity of pavement buried sensor Pending CN115468593A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211312635.6A CN115468593A (en) 2022-10-25 2022-10-25 Equipment for detecting compressive capacity of pavement buried sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211312635.6A CN115468593A (en) 2022-10-25 2022-10-25 Equipment for detecting compressive capacity of pavement buried sensor

Publications (1)

Publication Number Publication Date
CN115468593A true CN115468593A (en) 2022-12-13

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ID=84336398

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211312635.6A Pending CN115468593A (en) 2022-10-25 2022-10-25 Equipment for detecting compressive capacity of pavement buried sensor

Country Status (1)

Country Link
CN (1) CN115468593A (en)

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