CN210375001U - Efficient marshall test piece altitude measurement appearance - Google Patents
Efficient marshall test piece altitude measurement appearance Download PDFInfo
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- CN210375001U CN210375001U CN201920890842.7U CN201920890842U CN210375001U CN 210375001 U CN210375001 U CN 210375001U CN 201920890842 U CN201920890842 U CN 201920890842U CN 210375001 U CN210375001 U CN 210375001U
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Abstract
The utility model provides a pair of efficient marshall test piece height measurement appearance, including laser rangefinder sensor, display, support mount, test bench and singlechip, wherein, hit real fashioned marshall test piece and place on the test bench, support the one end of mount and fix on the test bench, the other end connects laser rangefinder sensor, laser rangefinder sensor places in and hits the top of real fashioned marshall test piece, simultaneously, laser rangefinder sensor electricity is connected the singlechip, the singlechip electricity is connected the display; the measuring instrument effectively avoids the problems of inaccurate measurement, labor waste, low test efficiency and the like caused by measuring the height of the Marshall test piece by using the vernier caliper, and obviously improves the experimental efficiency.
Description
Technical Field
The utility model belongs to bituminous mixture experimental facilities innovation field, concretely relates to efficient marshall test piece height measuring instrument.
Background
The Marshall stability test of the asphalt mixture introduced in the national industry Standard 'road engineering asphalt and asphalt mixture test Specification' JTG E20-2011 is a key step for determining the mix proportion and composition of the asphalt mixture, and the Marshall stability test is characterized by preparing the asphalt mixture into a cylindrical test piece and then measuring the stability and the flow value of the cylindrical test piece on a stability instrument so as to represent the stability and the deformation resistance of the asphalt mixture at high temperature. While the height of the cylindrical marshall test piece has a significant impact on the experimental results. The height of the Marshall test piece formed by the T0702 standard compaction method is in accordance with the requirement of 63.5 +/-1.3 mm, and the height of the large Marshall test piece is in accordance with the requirement of 95.3 +/-2.5 mm.
At present, the height measurement method of the Marshall test specimen is to measure the height of 10mm from the edge in 4 symmetrical directions of a cross by using a vernier caliper, the accurate value is 0.1mm, and the average value is taken as the height of the test specimen. If the height of the test piece does not meet the requirements of 63.5 +/-1.3 mm or 95.3 +/-2.5 mm or the height difference of the two sides is more than 2mm, the test piece is discarded. Measuring the height of the marshall test piece with a vernier caliper has the following disadvantages: (1) the specification requires that 4-direction values of cross symmetry are measured by using a vernier caliper, the number of a group of Marshall test pieces is not less than 4, and 4-5 groups of different oilstone ratios need to be measured in one experiment, so that at least 64 times of measurement are needed, and the manual measurement is low in efficiency. (2) When the vernier caliper reading is carried out, the reading size can be inaccurate due to the influence of the eye parallax of the experimenter, and the reading is accurate to 0.1 mm. (3) Because the vernier caliper needs to be adjusted before the height of the Marshall specimen is measured every time, the experimenter needs to adjust the vernier caliper in the whole process, the labor is wasted, and the operation is complicated.
Disclosure of Invention
An object of the utility model is to provide an efficient marshall test piece height measurement appearance has solved current marshall test piece height measurement method and has adopted slide caliper to measure, has the defect that the precision is not high.
In order to achieve the above purpose, the utility model discloses a technical scheme is:
the utility model provides a pair of efficient marshall test piece altitude measurement appearance, including laser ranging sensor, display, support mount, test bench and singlechip, wherein, hit real fashioned marshall test piece and place on the test bench, the one end of supporting the mount is fixed on the test bench, and laser ranging sensor is connected to the other end, and laser ranging sensor arranges the top of hitting real fashioned marshall test piece in, and simultaneously, the singlechip is connected to laser ranging sensor electricity, singlechip electricity connection display.
Preferably, the upper end of the test bed is provided with a bottom die, the compacted Marshall test piece is placed on the bottom die, and the top die is arranged on the top of the compacted Marshall test piece.
Preferably, a suction cup is arranged between the test bed and the bottom die.
Preferably, the supporting and fixing frame is connected with the laser ranging sensor through a connecting piece, and the connecting piece is movably connected with the supporting and fixing frame and the laser ranging sensor respectively.
Preferably, the model of the singlechip is a W77E58 chip.
Preferably, a pin P3.0 of the singlechip is connected with a pin T1IN of the laser ranging sensor, and a pin P3.1 of the singlechip is connected with a pin R1OUT of the laser ranging sensor;
the p1.0, p1.1, p1.2, p1.3, p1.4 and p1.5 pins of the single chip microcomputer are connected with a display.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a pair of efficient marshall test piece altitude measurement appearance will hit real fashioned marshall test piece and place at the test bench, survey the distance through laser rangefinder sensor to show the reading through the display, the device can be smooth carry out the measurement of marshall test piece height, reach the purpose of judging marshall test piece height in the experimentation. The measuring instrument effectively avoids the problems of inaccurate measurement, labor waste, low test efficiency and the like caused by measuring the height of the Marshall test piece by using the vernier caliper, and obviously improves the experimental efficiency.
Furthermore, a bottom die and a top die are additionally arranged on the test bed, so that the data is more accurate during measurement.
Drawings
Fig. 1 is a schematic structural diagram of a measuring instrument according to the present invention;
FIG. 2 is a circuit connection diagram of the single chip microcomputer;
the device comprises a laser ranging sensor 1, a laser ranging sensor 2, a top die 3, a bottom die 4, a compacted Marshall test piece 5, a display 6, a supporting and fixing frame 7, a test bed 8, a sucker 9, a single chip microcomputer mounting plate 10 and a single chip microcomputer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides a high-efficient marshall test piece height measuring apparatu, including laser rangefinder sensor 1, top mould 2, die block 3, hit real fashioned marshall test piece 4, display 5, support mount 6, test bench 7, sucking disc 8, singlechip mounting panel 9 and singlechip 10, wherein, sucking disc 8 adsorbs the up end at test bench 7, and die block 3 is fixed on sucking disc 8, hits real fashioned marshall test piece 4 and places on die block 3, and top mould 2 places on hitting real fashioned marshall test piece 4;
the supporting and fixing frame 6 is fixed on the upper end surface of the test bed 7, and the laser ranging sensor 1 is fixed on the supporting and fixing frame 6 and is arranged above the Marshall test piece 4 which is formed by compaction.
The supporting and fixing frame 6 is connected with the laser ranging sensor 1 through a connecting piece 6-1, a first mounting hole and a second mounting hole are formed in the connecting piece 6-1, and the center lines of the first mounting hole and the second mounting hole are perpendicular to each other and do not intersect.
One end of the laser ranging sensor 1 is arranged above the tamped and molded Marshall test piece 4, and the other end of the laser ranging sensor is assembled in the first mounting hole and is fastened and connected through a first fastening piece;
the second mounting hole is sleeved on the supporting and fixing frame 6, and the connecting piece 6-1 moves up and down along the supporting and fixing frame 6; the connecting piece 6-1 is connected with the supporting and fixing frame 6 through a second fastening piece.
The distance between the top die 2 and the test bed 7 is measured through the laser ranging sensor 1, the measured data are transmitted to the single chip microcomputer 10, the single chip microcomputer 10 processes the received data, and the processed result is transmitted to the display 9 to be read.
The singlechip 10 is a chip of W77E58 type, wherein a P3.0 pin (RXD pin) of the singlechip is connected with a T1IN pin of the laser ranging sensor 1, and a P3.1 pin (TXD pin) of the singlechip is connected with an R1OUT pin of the laser ranging sensor 1;
the p1.0, p1.1, p1.2, p1.3, p1.4 and p1.5 pins of the single chip microcomputer are connected with a display.
An efficient Marshall test piece measuring instrument comprises the following specific operation steps:
1. the position of the laser ranging sensor 1 is adjusted through the supporting and fixing frame 6, so that laser emitted by the laser ranging sensor 1 can touch the experiment table 7;
2. turning on a switch button of the display 5, inputting a ranging command 'g/n', starting to control the laser ranging sensor 1 to work by the singlechip 10, starting to execute a program by the singlechip 10 to perform ranging to obtain a distance H from the laser ranging sensor 1 to the experiment table 7, and storing the distance H by the test system;
3. the bottom mold 3 of the test piece was set at a fixed position, the tamped shaped marshall test piece 4 was placed on the bottom mold 3, and then the top mold 2 was placed above the marshall test piece 4. The height of the laser ranging sensor 1 is controlled to be unchanged through the supporting and fixing frame 6, and then the left and right positions of the laser ranging sensor 1 are adjusted through the left and right adjusting screws. Aligning the test piece to the middle position of the Marshall test piece approximately, and then fixing the laser ranging sensor 1;
4. inputting a ranging command 'g/n', executing the ranging command again by the singlechip to obtain the distance H from the ranging sensor 1 to the top die 2 on the Marshall test piece 41. The test system first aligns the distance H1Store and then execute h1＝H-H12c to obtain the height of the Marshall specimen, then stored by the system h1；
5. Rotating the compacted Marshall specimen 4 by 90 degrees, and executing the steps again to obtain the height h of the Marshall specimen2By analogy, obtain h3、h4The system averages the four heights after storing the heights
Let h be the height of the Marshall specimen height. Then the height h of the Marshall test piece is displayed through the display on the display 5, so as to judge whether the height of the Marshall test piece meets the specification requirement;
after the test of one group of test pieces is finished, clicking a reset button on the display 5, clearing data, only keeping the distance H from the laser ranging sensor 1 to the experiment table 7, and then continuing to measure the height of the next group of Marshall test pieces according to the steps. And after all the test pieces are tested, clicking a switch button and closing the measuring instrument.
Claims (6)
1. The utility model provides an efficient marshall test piece altitude measurement appearance, a serial communication port, including laser rangefinder sensor (1), display (5), support mount (6), test bench (7) and singlechip (10), wherein, hit real fashioned marshall test piece (4) and place on test bench (7), the one end of supporting mount (6) is fixed on test bench (7), laser rangefinder sensor (1) is connected to the other end, laser rangefinder sensor (1) is arranged in and is hit the top of real fashioned marshall test piece (4), simultaneously, singlechip (10) are connected to laser rangefinder sensor (1) electricity, display (5) are connected to singlechip (10) electricity.
2. The high-efficiency Marshall specimen height measuring instrument according to claim 1, characterized in that the upper end of the test bed (7) is provided with a bottom die (3), the compacted Marshall specimen (4) is placed on the bottom die (3), and the top of the compacted Marshall specimen (4) is provided with a top die (2).
3. The high-efficiency Marshall specimen height measuring instrument according to claim 2, characterized in that a suction cup (8) is arranged between the test bed (7) and the bottom die (3).
4. The efficient Marshall specimen height measuring instrument according to claim 1, wherein the supporting and fixing frame (6) and the laser ranging sensor (1) are connected through a connecting piece (6-1), and the connecting piece (6-1) is movably connected with the supporting and fixing frame (6) and the laser ranging sensor (1) respectively.
5. The efficient marshall test piece height measuring instrument as claimed in claim 1, wherein the single chip microcomputer (10) is a W77E58 chip.
6. The efficient Marshall test piece height measuring instrument as claimed in claim 5, wherein pin P3.0 of the single chip microcomputer (10) is connected with pin T1IN of the laser ranging sensor (1), pin P3.1 of the single chip microcomputer (10) is connected with pin R1OUT of the laser ranging sensor (1);
the pins p1.0, p1.1, p1.2, p1.3, p1.4 and p1.5 of the singlechip (10) are connected with a display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920890842.7U CN210375001U (en) | 2019-06-13 | 2019-06-13 | Efficient marshall test piece altitude measurement appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920890842.7U CN210375001U (en) | 2019-06-13 | 2019-06-13 | Efficient marshall test piece altitude measurement appearance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210375001U true CN210375001U (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920890842.7U Active CN210375001U (en) | 2019-06-13 | 2019-06-13 | Efficient marshall test piece altitude measurement appearance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210375001U (en) |
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- 2019-06-13 CN CN201920890842.7U patent/CN210375001U/en active Active
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