CN110132777A - A kind of construction material rigidity detection device - Google Patents
A kind of construction material rigidity detection device Download PDFInfo
- Publication number
- CN110132777A CN110132777A CN201910347961.2A CN201910347961A CN110132777A CN 110132777 A CN110132777 A CN 110132777A CN 201910347961 A CN201910347961 A CN 201910347961A CN 110132777 A CN110132777 A CN 110132777A
- Authority
- CN
- China
- Prior art keywords
- plate
- clamping plate
- construction material
- hardometer
- hydraulic cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- 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
-
- 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
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
Abstract
The invention discloses a kind of construction material rigidity detection devices, including pedestal, support plate, hardometer case and sleeve, by column slide back and forth with telescopic rod it is flexible can comprehensive adjustment hardometer case position, second hydraulic cylinder adjusts the height of hardometer case up and down simultaneously, facilitate adjustment hardness determination range, the lifting belt moving sleeve of first hydraulic cylinder is gone up and down, it can adjust the height of construction material to be detected, it is placed on unit to be placed convenient for fixed construction material, carry out hardness determination, first clamping plate is realized elastic under the promotion of locking bar in sleeve, when guide wheel gripping rods object in first clamping plate carries out hardness determination, shaft can be mobile with guide wheel, facilitate the comprehensive hardness determination of shaft, in addition first clamping plate can be used for clamping plate object by flower pattern bar fixed concave plate, therefore the present invention can be simultaneously to shaft in construction material, plate Shape object carries out hardness determination, and multi-purpose content improves rigidity detection device use scope.
Description
Technical field
The invention belongs to building material apparatus technical field, in particular to a kind of construction material rigidity detection device.
Background technique
In building construction process, in order to guarantee construction quality, need to detect construction material, wherein when hardness
A building materials quality important indicator whether up to standard, since construction material not only includes the plate objects such as floor tile, ceramic tile, and
And further include the classes shaft such as the bars such as reinforcing bar or water pipe, if publication No. is one kind disclosed in CN109211677A convenient for clamping
Steel pipe is inserted into sleeve, is fixed steel pipe using electromagnetic force by the rigidity detection device of steel pipe, although good fixing effect, electricity
The lasting existing electric power support of magnetic force needs, waste of resource, in addition, limitation of the conventional hardness detection device due to fixed device,
Single rigidity detection device is merely capable of carrying out hardness determination for particular kind of material, it is difficult to various each in construction material
Plate object and shaft carry out hardness determination in all directions, and purchase multiple rigidity detection devices and will increase construction cost,
The waste of resource is caused, therefore is directed to construction material hardness determination, one kind is needed to be able to detect various equipment, to save
Cost improves efficiency.
Summary of the invention
The purpose of the present invention is to provide a kind of construction material rigidity detection devices, to solve to propose in above-mentioned background technique
The problem of, to achieve the above object, the invention provides the following technical scheme: a kind of construction material rigidity detection device, including bottom
Seat, support plate, hardometer case and sleeve, four end of Its lower side are equipped with universal wheel, and the sliding rail of left end is equipped on the upside of pedestal
Column capable of sliding back and forth, the upper end of the column are connect by telescopic rod and second hydraulic cylinder with hardometer case, immediately below hardometer case
For the mounting table of middle side part on pedestal, the pedestal position of mounting table front side and rear side is equipped with first hydraulic cylinder, first hydraulic cylinder
It is connect with support plate, support plate is fixedly connected by fixed plate with sleeve both ends, and the rotating cylinder covered in the middle part of sleeve passes through third liquid
Cylinder pressure is connect with support plate.
It is equipped with display screen on the right side of the hardometer case, servo motor is fixed in hardometer case, servo motor passes through first
Gear, second gear and lead screw connect, and lead screw upper end is slidably connected with the first limiting slot on the upside of hardometer case, and lead screw lower end is worn
It crosses on the downside of hardometer case, and lead screw lower end is fixedly connected with pressure sensor, is fixedly connected with pressure head, and pressure on the downside of pressure sensor
Sensors sides annular spread has infrared lamp.
The locked groove of the rotating cylinder interior annular distribution and the push plate of locking bar one end, which cooperate, to be connected, and the push rod other end runs through
It is connect after sleeve with first clamping plate outside, the push rod position on the outside of push plate and sleeve is cased with the first spring.
The first clamping plate middle inside is equipped with guide wheel, and when first clamping plate gripping rods object, guide wheel is contacted with shaft,
Shaft is fixed, when first clamping plate and clamping flower pattern bar, flower pattern bar side face boss and the first of adjacent guide wheel position
Clamping plate contact, first clamping plate both ends are respectively gag lever post and the second limiting slot, and the second limiting slot bottom end and second spring one end are solid
Fixed connection, gag lever post are inserted into the second limiting slot of adjacent first clamping plate.
The flower pattern bar is fixedly connected far from fixed plate one end with notch plate back side, through there is slide bar on the upside of notch plate, is slided
Bar upper end is equipped with block, and slide bar bottom end is fixedly connected with second clamping plate, and the slide bar position on the upside of second clamping plate and notch plate covers
There are third spring, third spring upper end and notch plate upper contact, third lower spring end and second clamping plate upper contact.
As preferred: the second hinged seat and third hydraulic cylinder upper end on the left of the rotating cylinder are hinged, third hydraulic cylinder lower end
It is hinged with the first hinged seat on the upside of support plate.
As preferred: being equipped with groove corresponding with notch plate 25 on the upside of the mounting table, and when first hydraulic cylinder is contracted to
When most short value, notch plate downside is placed exactly in the groove of mounting table.
As preferred: lead screw top and bottom side is equipped with positive stop strip, and the first limiting slot side is equipped with and limit
The limit guide rail of position item cooperation, for limiting lead screw rotation.
Compared with prior art, the beneficial effects obtained by the present invention are as follows being: third hydraulic cylinder extension of the invention, band turn
The rotation of cylinder, the locked groove in rotating cylinder push locking bar sliding, push first clamping plate mobile by locking bar, fast implement first clamping plate
It is mobile；First clamping plate can not only clamp the shaft of construction material by guide wheel, but also can be clamped and be spent by first clamping plate
Type bar facilitates hardometer to shaft and plate object using the plate object of notch plate clamping construction material fixed on flower pattern bar
Various construction materials carry out hardness determination, additionally by guide wheel, facilitate the longer shaft construction material front and back of length
Sliding is conducive to carry out shaft construction material comprehensive hardness determination, and the present invention is slid back and forth on the slide rail by column,
The position of the flexible adjustable hardometer case of telescopic rod, when the position for just adjusting hardness determination；Pedestal of the present invention is arranged with universal
Wheel, is more become easy to remove by universal wheel；To sum up, the present invention can not only carry out hardness inspection to various construction materials
It surveys, saves equipment cost, and easy to use.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention, in the accompanying drawings:
Fig. 1 is facing structure figure of the present invention；
Fig. 2 be the present invention to shaft hardness determination when right view structure chart；
Fig. 3 be the present invention to plate analyte detection when right view structure chart；
Fig. 4 is part A partial enlarged view in Fig. 3 of the present invention；
Rotating cylinder cross-sectional view when Fig. 5 is clamping shaft in sleeve of the present invention；
Rotating cylinder cross-sectional view when Fig. 6 is clamping flower pattern bar in sleeve of the present invention；
Fig. 7 is first clamping plate structure chart of the present invention；
Fig. 8 is hardometer structure chart of the present invention.
Figure label: 1 pedestal；2 universal wheels；3 first hydraulic cylinders；4 support plates；401 first hinged seats；5 sliding rails；6 columns；
7 telescopic rods；8 second hydraulic cylinders；9 hardometer casees；901 first limiting slots；902 limit guide rails；10 third hydraulic cylinders；11 is fixed
Plate；12 rotating cylinders；1201 second hinged seats；1202 locked grooves；13 sleeves；14 shafts；15 mounting tables；16 display screens；17 pressure heads；18
Plate object；19 locking bars；1901 push plates；20 first springs；21 first clamping plates；2101 gag lever posts；2102 second limiting slots；22 lead
Wheel；23 flower pattern bars；24 second springs；25 notch plates；26 second clamping plates；27 slide bars；2701 blocks；28 third springs；29 servos
Motor；30 first gears；31 second gears；32 lead screws；3201 positive stop strips；33 pressure sensors；34 infrared lamps.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-8 is please referred to, the present invention provides a kind of technical solution: a kind of construction material rigidity detection device, including pedestal
1, support plate 4, hardometer case 9 and sleeve 13,1 downside of pedestal, four ends are equipped with universal wheel 2, and 1 upside left end of pedestal, which is equipped with, to be slided
Rail 5, sliding rail 5 are equipped with column 6 capable of sliding back and forth, and 6 upper end of column is fixedly connected with 7 bottom end of telescopic rod, 7 top of telescopic rod and
8 bottom end of second hydraulic cylinder is fixedly connected, and 8 other end of second hydraulic cylinder is fixedly connected with downwards hardometer case 9, hardometer case 9 just under
Side is the mounting table 15 of middle side part on pedestal 1, and 15 front side of mounting table and 1 position of pedestal of rear side are equipped with first hydraulic cylinder 3, the
One hydraulic cylinder 3 is connect with support plate 4, and 4 front and rear edges of support plate is equipped with fixed plate 11, the fixed company of fixed plate 11 and 13 both ends of sleeve
It connects, rotating cylinder 12 is cased in the middle part of sleeve 13, and rotating cylinder 12 is connect by third hydraulic cylinder 10 with support plate 4,12 left side of rotating cylinder
Equipped with the second hinged seat 1201, the second hinged seat 1201 and 10 upper end of third hydraulic cylinder are hinged, 10 lower end of third hydraulic cylinder
It is hinged with the first hinged seat 401 of 4 upside of support plate, the display screen 16 for showing hardness information is equipped on the right side of hardometer case 9,
Servo motor 29 is fixed in hardometer case 9, second in first gear 30 and lead screw 32 fixed on 29 rotor of servo motor
Gear 31 is cooperatively connected, and second gear 31 is threadedly coupled with the screw thread position of lead screw 32, and on 32 upper end of lead screw and hardometer case 9
First limiting slot 901 of side is slidably connected, and 32 lower end of lead screw passes through 9 downside of hardometer case, and 32 lower end of lead screw is fixedly connected with pressure
Force snesor 33 is fixedly connected with pressure head 17 on the downside of pressure sensor 33, and 33 side annular spread of pressure sensor has infrared lamp
34,32 top and bottom side of lead screw is equipped with positive stop strip 3201, and 901 side of the first limiting slot is equipped with and matches with positive stop strip 3201
The limit guide rail 902 of conjunction is rotated for limiting lead screw 32, and there are six the locked grooves of right-angled trapezium for the distribution of 12 interior annular of rotating cylinder
1202, and the trapezoidal inclined plane of locked groove 1202 is located remotely from 13 side of sleeve, 1202 trapezoidal inclined plane of locked groove is pushed away with 19 one end of locking bar
The cooperation of plate 1901 connects, and 19 other end of push rod runs through after sleeve 13, and corresponding in 13 interior annular cavity of sleeve the
It is connected on the outside of one clamping plate 21,19 position of push rod in 13 outside of push plate 1901 and sleeve is cased with the first spring 20, the first spring
20 both ends are connected on the outside of push plate 19 and sleeve 13 respectively, and 21 middle inside of first clamping plate is equipped with leading for fixing shaft object 14
Wheel 22, when 21 gripping rods object 14 of first clamping plate, guide wheel 22 is contacted with shaft 14, and shaft 14 is fixed, when the first folder
When plate 21 clamps dodecagon and is spaced the flower pattern bar 23 of six sides protrusion, 23 lateral projections position of flower pattern bar and adjacent guide wheel 22
The first clamping plate 21 at position contacts, and 21 both ends of first clamping plate are respectively gag lever post 2101 and the second limiting slot 2102, the second limit
2102 bottom end of slot is fixedly connected with 24 one end of second spring, and gag lever post 2101 is inserted into the second limiting slot of adjacent first clamping plate 21
In 2102, flower pattern bar 23 is fixedly connected far from 11 one end of fixed plate with 25 back side of notch plate being open to the right, 25 upside of notch plate
Through there is slide bar 27,27 upper end of slide bar is equipped with block 2701, and 27 bottom end of slide bar is fixedly connected with second clamping plate 26, second clamping plate
26 are cased with third spring 28,28 upper end of third spring and 25 upper contact of notch plate with 27 position of slide bar on the upside of notch plate 25,
28 lower end of third spring and 26 upper contact of second clamping plate are equipped with groove corresponding with notch plate 25 on the upside of mounting table 15, and work as
When first hydraulic cylinder 3 is contracted to most short value, 25 downside of notch plate is placed exactly in the groove of mounting table 15.
Specifically, the present invention is when in use: to reinforcing bar, 14 construction material of the shafts such as water pipe is detected the present invention
When, shaft 14 is inserted into sleeve 13, the third hydraulic cylinder 10 utilizes 12 inverse time of 10 shrinkage band turn cylinder of third hydraulic cylinder
Needle rotates, and the locked groove 1202 in rotating cylinder 12 pushes locking bar 19 to slide, and locking bar 19 pushes first clamping plate 21,21 inside of first clamping plate
Guide wheel 22 grips shaft 14, shrinks first hydraulic cylinder 3, and until shaft 14 is contacted with mounting table 15, opening is infrared
Lamp 34 is positioned, and is shunk telescopic rod 7 by sliding back and forth column 6 and elongation and is adjusted 9 position of hardometer case, until infrared lamp
34 illumination are mapped to designated position, and elongation second hydraulic cylinder 8 adjusts 9 height of hardometer case, until pressure head 17 apart from shaft 14 about
Three cm distances open servo motor 29 later, drive second gear 31 to rotate by first gear 30, in the effect of lead screw 32
Under, band dynamic head 17 moves down, and carries out hardness determination, and the information signal of hardness determination is sent to display by pressure sensor 33
Screen 16, is shown the information of hardness determination by display screen 16.
When needing the position of a wide range of adjustment shaft 14, third hydraulic cylinder 10 is extended, unclamps first clamping plate 21, directly
Shaft 14 is pulled, moves shaft 14 on guide wheel 22.
When carrying out hardness determination to 18 construction material of the plate objects such as floor tile, ceramic tile, clamped by first clamping plate 21 solid
Determine flower pattern bar 23, after fixing using notch plate 25 fixed on guide plate 23 to plate object 18, hardness determination is carried out, by plate
After 18 edge of object is placed into notch plate 25, block 2701 is unclamped, the third spring 28 on slide bar 27 pushes second clamping plate 26 will
Plate object 18 steps up to fix.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, the technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention, the claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (8)
1. a kind of construction material rigidity detection device, including pedestal, support plate, hardometer case and sleeve, it is characterised in that: described
Four end of Its lower side is equipped with universal wheel, and the sliding rail of left end is equipped with column capable of sliding back and forth on the upside of pedestal, and the upper end of the column passes through
Telescopic rod and second hydraulic cylinder are connect with hardometer case, are the mounting table of middle side part on pedestal, mounting table immediately below hardometer case
Front side and the pedestal position of rear side are equipped with first hydraulic cylinder, and first hydraulic cylinder is connect with support plate, and support plate passes through fixed plate
The rotating cylinder for being fixedly connected with sleeve both ends, and covering in the middle part of sleeve is connect by third hydraulic cylinder with support plate.
2. a kind of construction material rigidity detection device according to claim 1, it is characterised in that: on the right side of the hardometer case
Equipped with display screen, servo motor is fixed in hardometer case, servo motor is connected by first gear, second gear and lead screw,
Lead screw upper end is slidably connected with the first limiting slot on the upside of hardometer case, and lead screw lower end passes through on the downside of hardometer case, and under lead screw
End is fixedly connected with pressure sensor, is fixedly connected with pressure head on the downside of pressure sensor, and pressure sensor side annular spread have it is red
Outer lamp.
3. a kind of construction material rigidity detection device according to claim 1, it is characterised in that: the rotating cylinder interior annular
The push plate of the locked groove of distribution and locking bar one end, which cooperates, to be connected, and the push rod other end connects after sleeve with first clamping plate outside
It connects, the push rod position on the outside of push plate and sleeve is cased with the first spring.
4. a kind of construction material rigidity detection device according to claim 3, it is characterised in that: on the inside of the first clamping plate
Middle part is equipped with guide wheel, and when first clamping plate gripping rods object, guide wheel is contacted with shaft, and shaft is fixed, and works as first clamping plate
When with clamping flower pattern bar, flower pattern bar side face boss is contacted with the first clamping plate at adjacent guide wheel position, first clamping plate both ends point
Not Wei gag lever post and the second limiting slot, the second limiting slot bottom end is fixedly connected with second spring one end, gag lever post insertion adjacent the
In second limiting slot of one clamping plate.
5. a kind of construction material rigidity detection device according to claim 4, it is characterised in that: the flower pattern bar is far from solid
Fixed board one end is fixedly connected with notch plate back side, and through there is slide bar on the upside of notch plate, slide bar upper end is equipped with block, and slide bar bottom end
Be fixedly connected with second clamping plate, the slide bar position on the upside of second clamping plate and notch plate is cased with third spring, third spring upper end with
Notch plate upper contact, third lower spring end and second clamping plate upper contact.
6. a kind of construction material rigidity detection device described in -3 any claims according to claim 1, it is characterised in that: institute
It states the second hinged seat on the left of rotating cylinder and third hydraulic cylinder upper end is hinged, the first hinge on the upside of third hydraulic cylinder lower end and support plate
Joint chair is hinged.
7. a kind of construction material rigidity detection device according to claim 1, it is characterised in that: set on the upside of the mounting table
There is groove corresponding with notch plate 25, and when first hydraulic cylinder is contracted to most short value, notch plate downside is placed exactly in placement
In the groove of platform.
8. a kind of construction material rigidity detection device according to claim 2, it is characterised in that: the lead screw upper end is under
End side surface is equipped with positive stop strip, and the first limiting slot side is equipped with the limit guide rail cooperated with positive stop strip, turns for limiting lead screw
It is dynamic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910347961.2A CN110132777B (en) | 2019-04-28 | 2019-04-28 | Building material hardness detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910347961.2A CN110132777B (en) | 2019-04-28 | 2019-04-28 | Building material hardness detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110132777A true CN110132777A (en) | 2019-08-16 |
| CN110132777B CN110132777B (en) | 2021-10-15 |
Family
ID=67575380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910347961.2A Active CN110132777B (en) | 2019-04-28 | 2019-04-28 | Building material hardness detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110132777B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849086A (en) * | 2019-12-02 | 2020-02-28 | 广东汇博机器人技术有限公司 | Novel bathroom ceramic member intelligence drying equipment |
| CN110895230A (en) * | 2019-12-20 | 2020-03-20 | 芜湖舍达激光科技有限公司 | Coating detection tool for copper plate laser cladding |
| CN110926953A (en) * | 2019-11-07 | 2020-03-27 | 昆明华城兴建材有限公司 | Pressure detection mechanism of cement pressure plate |
| CN111157453A (en) * | 2020-03-17 | 2020-05-15 | 温岭云歌工艺品有限公司 | Ceramic tile surface nondestructive testing device |
| CN111948076A (en) * | 2020-08-03 | 2020-11-17 | 昆山市建设工程质量检测中心 | Method for testing surface hardness of grouting material in sleeve grouting hole and grout outlet hole |
| CN113340716A (en) * | 2021-07-15 | 2021-09-03 | 深圳森博科技有限公司 | Liquid crystal display hardness detection device |
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| CN207147909U (en) * | 2017-08-16 | 2018-03-27 | 浙江处州建设管理有限公司 | A kind of detection means for being used to detect the hardness of construction material |
| CN108680447A (en) * | 2018-08-09 | 2018-10-19 | 苏州市苏测检测技术有限公司 | A kind of construction material rigidity detection device |
| CN108732025A (en) * | 2018-07-27 | 2018-11-02 | 黄仕平 | A kind of construction engineering quality detection device |
| CN212539924U (en) * | 2020-04-30 | 2021-02-12 | 福建科华石墨科技有限公司 | Anti intensity detection device that rolls over of graphite products |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926953A (en) * | 2019-11-07 | 2020-03-27 | 昆明华城兴建材有限公司 | Pressure detection mechanism of cement pressure plate |
| CN110849086A (en) * | 2019-12-02 | 2020-02-28 | 广东汇博机器人技术有限公司 | Novel bathroom ceramic member intelligence drying equipment |
| CN110895230A (en) * | 2019-12-20 | 2020-03-20 | 芜湖舍达激光科技有限公司 | Coating detection tool for copper plate laser cladding |
| CN111157453A (en) * | 2020-03-17 | 2020-05-15 | 温岭云歌工艺品有限公司 | Ceramic tile surface nondestructive testing device |
| CN111948076A (en) * | 2020-08-03 | 2020-11-17 | 昆山市建设工程质量检测中心 | Method for testing surface hardness of grouting material in sleeve grouting hole and grout outlet hole |
| CN111948076B (en) * | 2020-08-03 | 2021-02-02 | 昆山市建设工程质量检测中心 | Method for testing surface hardness of grouting material in sleeve grouting hole and grout outlet hole |
| CN113340716A (en) * | 2021-07-15 | 2021-09-03 | 深圳森博科技有限公司 | Liquid crystal display hardness detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110132777B (en) | 2021-10-15 |
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