CN203365274U - Full-automatic asphalt penetrometer - Google Patents
Full-automatic asphalt penetrometer Download PDFInfo
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- CN203365274U CN203365274U CN 201320425776 CN201320425776U CN203365274U CN 203365274 U CN203365274 U CN 203365274U CN 201320425776 CN201320425776 CN 201320425776 CN 201320425776 U CN201320425776 U CN 201320425776U CN 203365274 U CN203365274 U CN 203365274U
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Abstract
The utility model discloses a full-automatic asphalt penetrometer. The penetrometer comprises a working table, wherein a vertical bracket is mounted on the working table; an upper horizontal bracket is fixed on the vertical bracket; a linear guide rail is mounted on the vertical bracket; a programmable controller is mounted on the upper horizontal bracket, and a hydraulic cylinder is fixed at the bottom of the upper horizontal bracket; a lower horizontal bracket is connected with the lower end of the hydraulic cylinder which is connected with the programmable controller; one end of the lower horizontal bracket is mounted on the linear guide rail; the lower horizontal bracket is connected with a stepping motor, below which a cantilever is arranged; an electromagnet and a needle connecting rod are mounted on the cantilever; a standard needle is mounted at the lower end of the needle connecting rod; an ultrasonic sensor is mounted below the cantilever, and a displacement sensor is mounted above the cantilever; the upper end of the needle connecting rod extends into the displacement sensor; the programmable controller, the stepping motor, the electromagnet, the displacement sensor, a temperature sensor, a heating wire and the ultrasonic sensor are all connected with a computer. The penetrometer effectively overcomes the defect of inexact result in the prior art.
Description
Technical field
The utility model belongs to earthwork engineering test detecting instrument device field, relates to a kind of bi tumenf orr oad performance testing device, specifically a kind of full-automatic bitumen needle forcemeter.
Background technology
In new asphalt test rules, the mensuration of regulation pen. adopts penetrometer to complete, and the accuracy of pen. test data and penetrometer crudy, resistance to overturning, automaticity etc. have very large relation.Yet, the factor of analyzing influence pitch pen. test accuracy, key factor comprises the control of contacting of test Plays pin and bituminous sheaths and water temperature.In testing regulations, require standard pin just to contact with bituminous sheaths, be not only seamless but also do not exist needle point to enter the situation of asphalt membrane between standard pin and asphalt film, but during practical operation because the pitch color is pitchy or black, the standard pin needle point is very elongated, add to operate in water and carry out, the range estimation needle point tends to cause observational error while whether contacting with bituminous sheaths, there will be test point too early or crosses late and insert in pitch, causes the most at last test result bigger than normal or less than normal.And if unskilled to this operation, the operating process time lengthening, the temperature of water will reduce, and need to ceaselessly regulate water temperature, has increased the difficulty of experiment.In addition, owing to making the reasons such as material, misoperation, easily occur bending, needle point passivation when the pitch standard pin is used, clean variations such as totally not being stained with pitch, impel standard pin very easily to wear and tear, while still using when not changing in time, needle point is contacted just with bituminous sheaths, can make test findings less than normal.To sum up, test result is subject to man's activity very large.Based on this, on the basis of traditional penetrometer, design and a kind ofly can steadily control the experiment water temperature, accurately adjusting standard pin, to fall into the full-automatic numerical control penetrometer of the degree of depth necessary.
Summary of the invention
In order to overcome defect or the deficiency existed in above-mentioned prior art, the object of the invention is to, a kind of full-automatic bitumen needle forcemeter is provided, this penetrometer adopts the radar range finding principle to measure the distance between pitch sample and standard pin, then automatic rotation cantilever, by the Controlled by Programmable Controller hydraulic jack, make the needle point of standard pin just contact with bituminous sheaths, in this process, by water temp. auto-control, make it the Pass Test temperature.
In order to realize above-mentioned task, the utility model adopts following technical scheme to be solved:
A kind of full-automatic bitumen needle forcemeter, comprise worktable, and perpendicular support is installed on described worktable, it is characterized in that, perpendicular support upper end is fixed with the upper lateral frame of level, on the perpendicular support of upper lateral frame below, line slideway is installed; Top rail is propped up Programmable Logic Controller is installed, and the top rail frame bottom is fixed with hydraulic jack, and the lower end of hydraulic jack is connected with lower lateral frame by piston rod, and hydraulic jack is connected with Programmable Logic Controller; The bottom rail support level arranges, and the one end is arranged on line slideway by pulley; Lower lateral frame below connects stepper motor by connecting link, and the stepper motor below is provided with the cantilever of level, and cantilever is positioned at directly over worktable; Stepper motor drives cantilever and rotates in surface level;
In described cantilever one end, electromagnet is installed, the other end is vertically passed by the pin connecting rod, and the pin connecting rod is provided with successively the first cavity and the second cavity be connected in the cantilever of electromagnet, the first cavity and the second cavity is column and the former is larger than latter xsect; Xsect is installed in the first cavity and is greater than the tight screw of stopping of the second cavity; Stop tight screw one termination contact pilotage connecting rod side, the other end and slide bar are connected, and a slide bar part is positioned at the first cavity, and another part is positioned at the second cavity; Overlap to have spring, the xsect of spring to be greater than the second cavity and be less than on the part that is positioned at the first cavity of slide bar and stop tight screw; Spring is fixed on the pin connecting rod in cantilever the thrust of stopping tight screw; The top that slide bar is positioned at the part of the second cavity is provided with the irony head, and the irony head is over against the electromagnet magnetic head on electromagnet; Pin connecting rod lower end is equipped with standard pin;
The below that is provided with electromagnet one end of described cantilever is equipped with ultrasonic sensor; The top of an end that is provided with the pin connecting rod of cantilever is equipped with displacement transducer, and the upper end of pin connecting rod is stretched in displacement transducer; Be provided with the temperature control tank on worktable, on the temperature control tank, be provided with heater strip; Be provided with temperature sensor in the temperature control tank;
Described Programmable Logic Controller, stepper motor, electromagnet, displacement transducer, temperature sensor, heater strip and ultrasonic sensor all are connected with computing machine.
Further, described cantilever is equipped with blade in upper end, and the rotating shaft of described stepper motor is connected with blade by shaft joint, and stepper motor drives blade rotation.
Further, the first cavity and the second cavity are cylindric.
Further, described full-automatic bitumen needle forcemeter also comprises the time relay be connected with computing machine.
Compare with existing penetrometer, the utlity model has following advantage:
1, the utility model is by the ultrasonic sensor measuring distance, by the lifting of hydraulic jack fine adjustment, standard pin is contacted just with bituminous sheaths, avoided in water observing the error that the contact position deviation of pitch standard pin and bituminous sheaths causes, make to test accuracy and fundamentally be improved.
2, by joining day relay and temperature controller, by computing machine full-automatic accurately control time and experimental temperature, simplified process of the test, greatly reduced experimental error simultaneously, make result more accurate.
3, when standard pin weares and teares, by automatic control, make needle point and bituminous sheaths that minimum gap be arranged, made up to a certain extent the measurement result caused due to tip wear less than normal.
Below in conjunction with accompanying drawing, content of the present utility model is further explained.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Each label implication in figure: 1, Programmable Logic Controller; 2, upper lateral frame; 3, hydraulic jack; 3-1, piston rod; 4, lower lateral frame; 5, connecting link; 6, stepper motor; 7, cantilever; 8, ultrasonic sensor; 9, temperature control tank; 10, temperature sensor; 11, computing machine; 12, worktable; 13, perpendicular support; 14, pulley; 15, line slideway; 16, pin connecting rod; 17, displacement transducer; 18, standard pin; 19, heater strip; 20, water; 21, pitch sample; 22, blade; 23, electromagnet; 24, shaft joint; 25, spring; 26, slide bar; 26-1, irony head; 27, electromagnet magnetic head; 28-1, the first cavity; 28-2, the second cavity; 29, stop tight screw.
Fig. 2 is the connection diagram of cantilever and pin connecting rod.
Embodiment
As shown in Figure 1, full-automatic bitumen needle forcemeter of the present utility model, comprise worktable 12, and perpendicular support 13 is installed on worktable 12, and perpendicular support 13 upper ends are fixed with the upper lateral frame 2 of level, on the perpendicular support 13 of upper lateral frame 2 belows, line slideway 15 are installed; On upper lateral frame 2, Programmable Logic Controller 1 is installed, upper lateral frame 2 bottoms are fixed with hydraulic jack 3, and the lower end of hydraulic jack 3 is connected with lower lateral frame 4 by piston rod 3-1, and hydraulic jack 3 is connected with Programmable Logic Controller 1; Lower lateral frame 4 is horizontally disposed with, and the one end is arranged on line slideway 15 by pulley 14; Lower lateral frame 4 belows connect stepper motor 6 by connecting link 5, and there is horizontally disposed cantilever 7 stepper motor 6 belows, and the rotating shaft of stepper motor 6 is connected with the blade 22 in being fastened on cantilever 7 upper ends by shaft joint 24; Cantilever 7 is positioned at directly over worktable 12; The rotating shaft of stepper motor 6 is rotated by shaft joint 24 band moving vanes 22, thereby drive cantilever 7, rotates; Hydraulic jack 3 drives lower lateral frame 4 and moves up and down along line slideway 15, thereby drive cantilever 7, moves up and down.
As shown in Figure 2, in described cantilever 7 one ends, electromagnet 23 is installed, the other end is vertically passed by pin connecting rod 16, pin connecting rod 16 is provided with successively the first cavity 28-1 and the second cavity 28-2 be connected in the cantilever 7 of electromagnet 23, the first cavity 28-1 and the second cavity 28-2 is column and the former is larger than latter xsect; Xsect is installed in the first cavity 28-1 and is greater than the tight screw 29 of stopping of the second cavity 28-2, make and stop tight screw 29 only in the first cavity 28-1 and can not enter the second cavity 28-2; Stop tight screw 29 1 termination contact pilotage connecting rod 16 sides, the other end and slide bar 26 are connected, and slide bar 26 parts are positioned at the first cavity 28-1, and another part is positioned at the second cavity 28-2; On the part that is positioned at the first cavity 28-1 of slide bar 26, cover has spring 25, the xsect of spring 25 to be greater than the second cavity 28-2 and to be less than to stop tight screw 29, make spring 25 be compressed in and stop between tight screw 29 and the first cavity 28-1 sidewall; The thrust that 25 pairs, spring stops tight screw 29 is fixed on pin connecting rod 16 in cantilever 7; The top that slide bar 26 is positioned at the part of the second cavity 28-2 is provided with an irony 26-1, and an irony 26-1 is over against the electromagnet magnetic head 27 on electromagnet 23; Pin connecting rod 16 lower ends are equipped with standard pin 18;
The below that is provided with electromagnet 23 1 ends of cantilever 7 is equipped with ultrasonic sensor 8; The top of an end that is provided with pin connecting rod 16 of cantilever 7 is equipped with displacement transducer 17, the upper end of pin connecting rod 16 is stretched in displacement transducer 17, the resistance variations that displacement transducer 17 causes for the dropping distance of electromagnetic induction pin connecting rod 16 comes bioassay standard pin 18 to insert the degree of depth of pitch samples 21, i.e. penetration number; Be provided with temperature control tank 9 on worktable 12, be provided with heater strip 19 on temperature control tank 9; Be provided with temperature sensor 10 in temperature control tank 13.
While utilizing penetrometer of the present utility model to carry out the pitch penetration test, test is carried out as follows:
1, preliminary work
Referring to Fig. 1, the worktable 12 of regulating penetrometer makes it level, in temperature control tank 9, adds water, and the water surface is 20, and pitch sample 21 is put into to water, and the water surface 20 is higher than pitch sample 21; By pin connecting rod 16, be fixed on cantilever 7 and installation code pin 18; Computing machine 11 is controlled heater strips 19 and is heated, and in warm water tank 9 to be controlled, water temperature reaches the regulation test temperature and can be tested.
2, test procedure
1) position of adjustment pitch sample 21 makes it in ultrasonic sensor 8 belows;
2) the start-up temperature sensor 10, make water temperature meet the requirement of experiment temperature;
3) start ultrasonic sensor 8, the data that computing machine 11 transmits according to ultrasonic sensor 8 calculate ultrasonic sensor 8 and pitch sample 21 measuring points apart from d; The rotating shaft of computer-controlled stepper motor 6 turns clockwise 180 °, and stepper motor 6 drives cantilever 7 rotations by blade 22, makes standard pin 18 just forward the original position of ultrasonic sensor 8 to; Computing machine 11 by d be scaled the needle point of standard pin 18 and pitch sample 21 measuring points now apart from d1.
4) thus computing machine 11 drives lower lateral frames 4 and moves down the d1 distance along line slideway 15 by controlling electromagnetic valve piston rod 3 in high-precision hydraulic oil cylinder 3 by Programmable Logic Controller 1, lower lateral frame 4 drives cantilever 7 and moves down, thereby makes standard pin 18 move down until needle point contacts just with pitch sample 21; The displacement transducer 17 of now resetting;
5) computing machine 11 is controlled electromagnet 23 and is passed into electric current, an irony 26-1 of slide bar 26 1 sides is adsorbed on the electromagnet magnetic head 27 of electromagnet 23, slide bar 26 againsts the force of the spring are to electromagnet 23 motions, stopping tight screw 29 separates with pin connecting rod 16, pin connecting rod 16 and standard pin 18 are released, and now, by time relay control time (acquiescence 5s), arrive the stipulated time, computing machine 11 is controlled electromagnet 23 outage streams, stops tight screw 29 and lock immediately pin connecting rod 16 under the elastic force power of Compress Spring 25.
6) distance that displacement transducer 17 bioassay standard pins 18 enter pitch sample 21, and the output displacement signal obtains the value of pen. to computing machine 11 after computing machine 11 processing;
7) same pitch sample replication is at least three times, and the distance between each measuring point and between measuring point and pitch sample edge is no less than 10mm.Each mensuration changed a clean standard pin or wipes clean with toluene or other solvents, then dries by clean cloth.When mensuration pen. is greater than 200 pitch sample 21, at least use three standard pins, could take out pin from the pitch sample until measured for three times, get the mean value of three times as experimental result.Note testing each time manually pin connecting rod 16 is fixed to relevant position.
8) experiment finishes, and cuts off the electricity supply.
It should be noted that, the utility model needs manually opened temperature sensor 10, in temperature control tank 9, water temperature reaches the rear manually opened ultrasonic sensor 8 of regulation requirement, all the other operations are computing machine 11 controls and carry out, the distance of the water temperature of experimentation Computer 11 simultaneous display temperature control tanks 9 and standard pin 18 and the water surface 20, final penetration number and the running time that shows the asphalt test recorded.
Principle of work of the present utility model is as follows:
Ultrasonic transducer system, pin connecting rod lifting device, temperature controller, pin connecting rod delivery system.
(1) ultrasonic transducer system: ultrasonic sensor 8 is the sensors that utilize hyperacoustic characteristic to develop, and by sending sensor, receiving sensor and controller, forms.Ultrasound wave is the mechanical wave of a kind of vibration frequency higher than sound wave, has good directionality, can become ray and the characteristics such as direction propagation.Ultrasound wave is very large to the penetrating power of liquid, gas, encountering impurity or interphase can produce significantly to reflect to form and be reflected into echo, therefore in test by receiving sensor, receiving ultrasound wave enters water and to form corresponding two kinds of reflection waves when in water, contacting bituminous sheaths from air, the corresponding time of computer recording, calculate the distance of ultrasonic transducer system and pitch sample by corresponding correction factor, because standard pin 18 and ultrasonic sensor 8 have known difference in height, thereby determine the distance of standard pin 18 needle points and bituminous sheaths.
(2) pin connecting rod lifting device principle of work: stepper motor is electric impulse signal to be changed into to the open loop control element of angular displacement or displacement of the lines.In the situation that non-overload, frequency and the umber of pulse of pulse signal are only depended in the rotating speed of motor, the position stopped, and are not subject to the impact of load variations, to motor, add a pulse signal, and motor turns over a step angle.After computing machine is determined the difference in height of bituminous sheaths and standard pin 18, make the lucky Rotate 180 ° of stepper motor by certain pulses, drive cantilever 7 Rotate 180s ° by blade 22, make standard pin 18 be in the position of the front ultrasonic sensor 8 of rotation, so just reduced the error caused because of the asphalt surface out-of-flatness, notice that pin connecting rod 16 and ultrasonic transducer system 8 central shafts are about connecting link 5 central shaft full symmetrics, the position that after the rotation, needle point 18 inserts like this is only the position of ultrasonic sensor 8 tests; On upper lateral frame 2 fixedly Programmable Logic Controller 1 and with the high-precision hydraulic oil cylinder of electromagnetic valve UNICOM, Programmable Logic Controller 1 is connected with electromagnetic valve with computing machine 11 by wire, the lower end of high-precision hydraulic oil cylinder 3 is connected with lower lateral frame 4 by piston rod 3-1, electromagnetic valve links by conduit and hydraulic power source, and high-precision hydraulic oil cylinder 3 piston rod 3-1 move up and down.Test Computer 11 is controlled Programmable Logic Controller 1 and is promoted piston rod 3, makes it the respective distance that descends, and now needle point 18 contacts just with bituminous sheaths.
(3) pin connecting rod delivery system principle of work: during off working state, the pin connecting rod is clamped by the tight screw 29 of stopping of right side, when standard needle point 18 contacts just with bituminous sheaths, computing machine 11 passes into electric current to electromagnet system 23, a slide bar irony 26-1 is adsorbed on electromagnet magnetic head 27, slide bar 26 drive right sides are stopped tight screw 29 againsts the force of the spring and are moved right, pin connecting rod 16 is discharged fully under Action of Gravity Field, the time relay starts timing simultaneously, after reaching official hour, computing machine is accepted the signal of time relay transmission, the automatic cutout electric current, electromagnet discharges slide bar 26, under the effect of Compress Spring 25, bullet to the left, make right side stop tight screw-clamped pin connecting rod, 16 moments of pin connecting rod are static.
(4) water temperature control device principle of work: temperature sensor 10 imports the water temperature information in temperature control tank 9 into computing machine 11 in real time, computing machine 11 is by changing its power to after identifying heater strip 19 control signals, as heating, constant temperature signal, make it to meet the water temperature range of requirement of experiment.
(5) displacement sensor device principle of work: the pin connecting rod of metal material stretches in the displacement transducer sleeve, displacement transducer depends on the movement of pin connecting rod in coil rack, when elementary coil is supplied with the alternating voltage (driving voltage) of certain frequency, iron core is the mobile Distribution of Magnetic Field that has just changed space in coil, thereby at the beginning of having changed, mutual induction amount between secondary coil, secondary coil just produces induction electromotive force, position difference along with the pin connecting rod, mutual induction amount is also different, the induction electromotive force of secondary generation is also different, so just the displacement of pin connecting rod has been become to voltage signal output.At first the pin connecting rod is demarcated in practical application, the pin connecting rod is all inserted in displacement transducer, now the signal post of output location 0, and by pin connecting rod decline 50mm, now being demarcated as the 50(range is 0～500), relevant position is demarcated respectively in centre.During test not from, but the displacement difference between the pin connecting rod (can initial value be made zero by reset button, final value is displacement difference).Displacement signal converts electric signal to and converts digital signal to and outputs to computing machine 11 the most at last, and computing machine 11 calculates the pen. of pitch to be measured.
Claims (3)
1. a full-automatic bitumen needle forcemeter, comprise worktable (12), perpendicular support (13) is installed on described worktable (12), it is characterized in that, perpendicular support (13) upper end is fixed with the upper lateral frame (2) of level, on the perpendicular support (13) of upper lateral frame (2) below, line slideway (15) is installed; Programmable Logic Controller (1) is installed on upper lateral frame (2), upper lateral frame (2) bottom is fixed with hydraulic jack (3), the lower end of hydraulic jack (3) is connected with lower lateral frame (4) by piston rod (3-1), and hydraulic jack (3) is connected with Programmable Logic Controller (1); Lower lateral frame (4) is horizontally disposed with, and the one end is arranged on line slideway (15) by pulley (14); Lower lateral frame (4) below connects stepper motor (6) by connecting link (5), and stepper motor (6) below is provided with the cantilever (7) of level, and cantilever (7) is positioned at directly over worktable (12); Stepper motor (6) drives cantilever (7) and rotates in surface level;
In described cantilever (7) one ends, electromagnet (23) is installed, the other end is vertically passed by pin connecting rod (16), pin connecting rod (16) is provided with successively the first cavity (28-1) and the second cavity (28-2) be connected in the cantilever (7) of electromagnet (23), the first cavity (28-1) and the second cavity (28-2) is column and the former is larger than latter xsect; What be equipped with in the first cavity (28-1) that xsect is greater than the second cavity (28-2) stops tight screw (29); Stop tight screw (29) one termination contact pilotage connecting rod (16) sides, the other end and slide bar (26) are connected, and slide bar (a 26) part is positioned at the first cavity (28-1), and another part is positioned at the second cavity (28-2); Overlap to have spring (25), the xsect of spring (25) to be greater than the second cavity (28-2) and be less than on the part that is positioned at the first cavity (28-1) of slide bar (26) and stop tight screw (29); Spring (25) is fixed on pin connecting rod (16) in cantilever (7) the thrust of stopping tight screw (29); The top that slide bar (26) is positioned at the part of the second cavity (28-2) is provided with irony head (26-1), and irony head (26-1) is over against the electromagnet magnetic head (27) on electromagnet (23); Pin connecting rod (16) lower end is equipped with standard pin (18);
The below that is provided with electromagnet (23) one ends of described cantilever (7) is equipped with ultrasonic sensor (8); The top of an end that is provided with pin connecting rod (16) of cantilever (7) is equipped with displacement transducer (17), and the upper end of pin connecting rod (16) is stretched in displacement transducer (17); Be provided with temperature control tank (9) on worktable (12), be provided with heater strip (19) on temperature control tank (9); Be provided with temperature sensor (10) in temperature control tank (13);
Described Programmable Logic Controller (1), stepper motor (6), the time relay, electromagnet (23), displacement transducer (17), temperature sensor (10), heater strip (19) and ultrasonic sensor (8) all are connected with computing machine (11).
2. full-automatic bitumen needle forcemeter as claimed in claim 1, it is characterized in that, described cantilever (7) is equipped with blade (22) in upper end, and the rotating shaft of described stepper motor (6) is connected with blade (22) by shaft joint (24), and stepper motor (6) band moving vane (22) rotates.
3. full-automatic bitumen needle forcemeter as claimed in claim 1, is characterized in that, described the first cavity (28-1) and the second cavity (28-2) are cylindric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320425776 CN203365274U (en) | 2013-07-17 | 2013-07-17 | Full-automatic asphalt penetrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320425776 CN203365274U (en) | 2013-07-17 | 2013-07-17 | Full-automatic asphalt penetrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203365274U true CN203365274U (en) | 2013-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320425776 Expired - Fee Related CN203365274U (en) | 2013-07-17 | 2013-07-17 | Full-automatic asphalt penetrometer |
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| Country | Link |
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| CN (1) | CN203365274U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280316A (en) * | 2014-09-28 | 2015-01-14 | 广东惠利普路桥信息工程有限公司 | Asphalt penetration tester capable of changing needles |
| CN104990838A (en) * | 2015-08-05 | 2015-10-21 | 交通运输部公路科学研究所 | Calibration device and method of bitumen needle forcemeter |
| CN106970204A (en) * | 2017-05-09 | 2017-07-21 | 绍兴市容纳测控技术有限公司 | A kind of liquid plastic combine tester |
| CN107966385A (en) * | 2017-11-21 | 2018-04-27 | 卢锦福 | A kind of full-automatic petroleum asphalt penetration measuring instrument |
| CN108169073A (en) * | 2017-10-30 | 2018-06-15 | 甘肃达利食品有限公司 | A kind of detection method of potato full-powder stability |
| CN110082262A (en) * | 2019-04-16 | 2019-08-02 | 交通运输部公路科学研究所 | A kind of automatic penetrometer and its to needle method |
-
2013
- 2013-07-17 CN CN 201320425776 patent/CN203365274U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280316A (en) * | 2014-09-28 | 2015-01-14 | 广东惠利普路桥信息工程有限公司 | Asphalt penetration tester capable of changing needles |
| CN104990838A (en) * | 2015-08-05 | 2015-10-21 | 交通运输部公路科学研究所 | Calibration device and method of bitumen needle forcemeter |
| CN106970204A (en) * | 2017-05-09 | 2017-07-21 | 绍兴市容纳测控技术有限公司 | A kind of liquid plastic combine tester |
| CN108169073A (en) * | 2017-10-30 | 2018-06-15 | 甘肃达利食品有限公司 | A kind of detection method of potato full-powder stability |
| CN107966385A (en) * | 2017-11-21 | 2018-04-27 | 卢锦福 | A kind of full-automatic petroleum asphalt penetration measuring instrument |
| CN110082262A (en) * | 2019-04-16 | 2019-08-02 | 交通运输部公路科学研究所 | A kind of automatic penetrometer and its to needle method |
| CN110082262B (en) * | 2019-04-16 | 2024-05-10 | 交通运输部公路科学研究所 | Automatic needle penetration instrument and needle alignment method thereof |
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| 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: 20131225 Termination date: 20140717 |
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| EXPY | Termination of patent right or utility model |