CN111780708B - Strain gauge - Google Patents
Strain gauge Download PDFInfo
- Publication number
- CN111780708B CN111780708B CN202010508766.6A CN202010508766A CN111780708B CN 111780708 B CN111780708 B CN 111780708B CN 202010508766 A CN202010508766 A CN 202010508766A CN 111780708 B CN111780708 B CN 111780708B
- Authority
- CN
- China
- Prior art keywords
- leg part
- leg
- piece
- glue solution
- measuring
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention relates to a strain gauge, which comprises a first leg part and a second leg part, wherein the first leg part and the second leg part are connected with a measured object, the first leg part and the second leg part are arranged left and right, one side of the first leg part, facing the second leg part, is provided with an abutting positioning surface used for abutting and matching with the second leg part, a positioning spring or a magnetic structure used for forcing the first leg part and the second leg part to move relatively is arranged between the first leg part and the second leg part, and a displacement measuring mechanism used for measuring displacement change between the first leg part and the second leg part is also arranged between the first leg part and the second leg part. The present invention provides a strain gauge that does not require leg spacing measurement determinations.
Description
Technical Field
The invention relates to a strain gauge in the field of bridge strain detection.
Background
Newly-built bridge and the bridge after having carried out reinforcement or reconstruction, whether normal operating condition and bearing capacity of bridge structures meet the design requirement can be examined through the load test.
It is common practice to pass a vehicle under a certain load through a bridge and then measure the strain, deflection and inclination deformation of the bridge according to corresponding sensors on the bridge. For example, for strain measurement, a surface type strain gauge is fixed on the bottom surface of a beam, wherein the strain gauge is matched with the beam as shown in fig. 1, the strain gauge comprises fixing legs 2 which are independently arranged, fixing holes for the corresponding fixing legs to pass through are respectively arranged on a body of the strain gauge 3, during specific operation, a worker is lifted to the lower side of the beam body 1 through a lifting machine, the worker measures the distance between the two fixing legs 2 on the bottom surface of the beam, then the fixing legs are fixedly bonded on the bottom surface of the beam, finally the strain gauge 3 is sleeved on the fixing legs, and the strain gauge is fixed on the supporting legs through screwing nuts 4 on screw rods 5 of the fixing legs. When the beam is deformed by a load, the distance between the two legs changes, and the strain gauge measures the amount of change.
The existing strain gauge has the problems that: the distance between the two fixed legs is actually at the deformation zero point of the positioning strain gauge, and workers are required to measure the distance between the legs and the like, so that the time of high-altitude operation is seriously prolonged, and the high-altitude operation is not facilitated.
Disclosure of Invention
The present invention is directed to a strain gauge that does not require leg spacing measurement determinations.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a strain gauge comprises a first leg portion and a second leg portion, wherein the first leg portion and the second leg portion are connected with a measured part, the first leg portion and the second leg portion are arranged left and right, one side, facing the second leg portion, of the first leg portion is provided with an abutting positioning surface used for abutting and matching with the second leg portion, a positioning spring or a magnetic structure used for forcing the first leg portion and the second leg portion to move relatively is arranged between the first leg portion and the second leg portion, and a displacement measuring mechanism used for measuring displacement changes between the first leg portion and the second leg portion is further arranged between the first leg portion and the second leg portion.
The first leg portion is fitted to the second leg portion in a guided movable manner in the left-right direction.
The displacement measuring mechanism comprises a flexible measuring piece, one end of the flexible measuring piece is fixed on the first supporting leg part, a measuring piece winding drum for winding the other end of the flexible measuring piece is arranged on the second supporting leg part, the displacement measuring mechanism further comprises a winding drum encoder for detecting the rotation of the measuring piece winding drum, and a winding drum spring for tensioning the flexible measuring piece is connected to the measuring piece winding drum.
The upper end surfaces of the first leg part and the second leg part are bonding connection surfaces for bonding connection with a measured member.
The first leg part and the second leg part are provided with a storage capsule, the upper end of the storage capsule is higher than the bonding connection surface and is used for being extruded by a measured part, the storage capsule is connected with a glue solution channel, the glue solution channel comprises a glue solution outlet hole positioned on the bonding connection surface and a connection channel connected with the glue solution outlet hole and the storage capsule, and the glue solution channel is provided with a breakable membrane.
The glue solution outlet is a big belly hole with a small upper part and a big lower part.
The upper ends of the first leg part and the second leg part are provided with mounting grooves, and the capsule storage is positioned in the mounting grooves.
The upper ends of the first leg part and the second leg part are provided with mounting grooves, pushing eccentric wheels are rotatably mounted in the mounting grooves and driven by a motor, and the pushing eccentric wheels are provided with pushing surfaces which are used for being matched with the part to be measured in a pushing mode so that the bonding connection surfaces are separated from the part to be measured.
The invention has the beneficial effects that: when the measured piece is deformed, the first leg part and the second leg part overcome the acting force of the positioning spring to generate relative displacement, and the displacement measuring mechanism measures the displacement. The first leg part and the second leg part of the strain gauge are contacted, so that the measurement and the ensuring of the distance between the two legs are not needed as in the prior art, and the operation is simple.
Drawings
FIG. 1 is a schematic diagram of a strain gauge and a beam in the background art of the present invention;
FIG. 2 is a schematic diagram of the construction of one embodiment of a strain gauge of the present invention;
FIG. 3 is an enlarged view taken at A in FIG. 2;
FIG. 4 is a schematic diagram of the strain gage of the present invention in cooperation with a drone;
fig. 5 is a schematic view of the strain gage and beam of the present invention in combination.
Detailed Description
An embodiment of a strain gauge is shown in FIGS. 2-5:
the leg comprises a first leg part 1 and a second leg part 2 which are arranged at the left and right, wherein the first leg part 1 is matched with the second leg part 2 in a guiding and moving way along the left and right direction, a specific second leg part is provided with a guide hole 14 extending along the left and right direction along the guiding direction, and the first leg part is provided with a guide rod 13 extending into the guide hole and matched with the guide hole in a guiding and sliding way. The right end face of the first leg part forms a top abutting positioning face 20 which is used for abutting the matched top with the second leg part, a positioning spring 15 is arranged in the guide hole, the positioning spring 15 is an extension spring, the right end of the positioning spring is fixedly connected with the hole bottom of the guide hole, the left end of the positioning spring is fixedly connected with the guide rod 13, the positioning spring 15 exerts a right-facing pulling force on the first leg part 1, and it is guaranteed that the top abutting positioning face 20 on the first leg part 1 abuts against the second leg part 2 in a free state. A displacement measuring mechanism for measuring the relative displacement change of the first leg part and the second leg part is arranged between the first leg part 1 and the second leg part 2, in the embodiment, the displacement measuring mechanism is a stay cord displacement sensor 3, the displacement measuring mechanism comprises a flexible measuring part 4, one end of the flexible measuring part 4 is fixed on the first leg part, a measuring part winding drum 5 for winding the other end of the flexible measuring part is arranged on the second leg part, the displacement measuring mechanism further comprises a drum encoder for detecting the rotation of the measuring part winding drum, and a drum spring for tensioning the flexible measuring part is connected on the measuring part winding drum.
In order to adapt to the connection with the bottom surface of the beam body of the bridge, the upper end surfaces of the first leg part and the second leg part are adhesive connection surfaces 11 used for being adhesively connected with the measured piece. The left shoulder on the first leg portion and the right shoulder of second leg portion are provided with mounting groove 7, first leg portion, all be provided with the storage capsule 8 that is used for storing the glue solution in the mounting groove of second leg portion, the upper end of storage capsule 8 is higher than adhesive bonding face 11 and is used for being extruded by the measured part, be connected with the glue solution passageway on the storage capsule, the glue solution passageway is including being located glue solution outlet 10 on the adhesive bonding face and connecting the glue solution outlet 10 and the passageway 12 that is connected capsule 8, glue solution outlet 10 is big tripe hole from top to bottom, be provided with breakable membrane 9 on the glue solution passageway, breakable membrane 9 sets up in the aperture department of glue solution outlet 10 in this embodiment. In this embodiment, there are a plurality of glue outlets 10 on the first leg portion and the second leg portion, and the glue outlets on the same leg portion are connected by a connecting channel 12.
And pushing eccentric wheels 6 are rotatably arranged in the mounting grooves 7 of the first leg part and the second leg part and are driven by a motor, and the pushing eccentric wheels are provided with pushing surfaces 21 which are used for being in pushing fit with the measured piece so as to separate the bonding connection surface from the measured piece. And at the angle shown in fig. 3, the pushing eccentric wheel 6 on the first leg part rotates clockwise, and the pushing eccentric wheel on the second leg part rotates anticlockwise, so that the strain gauge can be pushed and separated from the lower side of the beam body. The glue solution outlet 10 is of a big belly structure with a small upper part and a big lower part, the breakable membrane 9 is arranged at the opening of the glue solution outlet 10, so that the breakable membrane can be torn by pressure, after the glue solution is solidified, the solidified glue solution, namely the bonding structure, is filled on the glue solution outlet and the bonding connection surface, the solidified glue solution and the leg part have stopping force of the big upper part and the small lower part besides the bonding force, when the strain gauge is separated from the bottom of the beam body, the bonding structure is separated from the bottom of the beam along with the strain gauge, and the problem that the surface of the bottom of the beam needs to be cleaned again in high-altitude operation due to the fact that the bonding structure remains on the surface of the bottom of the beam is solved.
When the strain gauge is not fixed at the bottom of the beam body, as shown in fig. 2, under the action of the positioning spring, the abutting positioning surface 20 on the right side of the first leg part 1 abuts against the left end of the second leg part 2, which is the measurement zero point of the displacement measurement mechanism, and the positioning spring also connects the first leg part and the second leg part into a whole.
In the actual bridge, the downside that has a lot of bridges all is water, can't set up elevating system, can't send the bottom of bridge to the staff, even can set up elevating system some places, high altitude construction also is a challenge to staff's psychology. In the invention, in order to completely free workers, gluing, fixing and dismantling of the strain gauge are set to be automatic modes, so that the strain gauge can be installed by means of some jacking mechanisms. For example, the strain gauge is fixed at the bottom of the beam 19 by the unmanned aerial vehicle 17, as shown in fig. 4, a support frame 16 is placed at the top of a housing 18 of the unmanned aerial vehicle, a positioning groove 22 is formed at the top of the support frame, the strain gauge is placed in the positioning groove 22, the unmanned aerial vehicle drives the whole strain gauge to fly upwards until the adhesive connecting surface is contacted with the bottom surface of the beam, in the process, the capsule is compressed, the pressure of the glue solution in the connecting channel is increased, the breakable membrane is squeezed open, the glue solution flows to the whole adhesive connecting surface through an orifice, so that the adhesive connecting surface is fixed with the bottom of the beam, the glue solution outlet is a big belly hole, on one hand, the breakable membrane can be smoothly squeezed open, in addition, after the glue solution is solidified, a stop structure is formed by the glue solution and the belly hole, the fixing strength of the strain gauge and the beam can be ensured, the glue solution is preferably quick-drying glue, for the unmanned aerial vehicle only needs to push for 5-30 seconds, the glue solution can reach 85% of the curing strength, and then the unmanned aerial vehicle can be evacuated and can reach 100% of the curing strength after standing for one day. After a load is applied to the upper side of the bridge, the beam body deforms, the first leg portion and the second leg portion overcome the acting force of the positioning spring to generate relative displacement, and the stay rope displacement sensor measures the displacement value to obtain the strain of the beam body. After the detection is finished, the motor drives the pushing eccentric wheel to rotate, the pushing eccentric wheel pushes the beam body to separate the first leg part and the second leg part from the beam body, the strain gauge drops, the strain gauge can be received by the net bag to prevent the strain gauge from being broken, or the strain gauge is received by the unmanned aerial vehicle, the pushing eccentric wheel acts again to push the strain gauge off from the beam body.
In other embodiments of the invention: the positioning spring can also be a pressure spring, and the pressure spring applies acting force towards the right direction to the first leg part, so that the propping positioning surface of the first leg part props against the second leg part in a natural state; the displacement measuring mechanism may not be a stay wire displacement sensor, for example, the displacement measuring mechanism is a laser displacement sensor disposed between the first leg portion and the second leg portion; the strain gauge can also be jacked to the bottom of the beam body through other jacking mechanisms, for example, the strain gauge is jacked to the bottom of the beam body through a lifting vehicle; of course, the positioning spring may also be replaced by a magnetic structure, for example, the magnetic mechanism includes a first magnetic body disposed on the first leg portion and a second magnetic body disposed on the second leg portion, and the first magnetic body and the second magnetic body attract each other, so that the abutting positioning surface of the first leg portion always abuts against the second leg portion before the first leg portion is not fixed.
Claims (4)
1. A strain gauge, characterized by: the measuring device comprises a first leg part and a second leg part which are used for being connected with a measured piece, the first leg part and the second leg part are arranged left and right, one side of the first leg part, facing the second leg part, is provided with an abutting positioning surface which is used for abutting and matching with the second leg part, a positioning spring or a magnetic structure which is used for forcing the first leg part and the second leg part to move relatively is arranged between the first leg part and the second leg part, a displacement measuring mechanism which is used for measuring displacement change between the first leg part and the second leg part is also arranged between the first leg part and the second leg part, the upper end surfaces of the first leg part and the second leg part are bonding connection surfaces which are used for being bonded and connected with the measured piece, a storage capsule is arranged on the first leg part and the second leg part, and the upper end of the storage capsule is higher than the bonding connection surfaces and is used for being extruded by the measured piece, the glue solution channel is connected to the storage capsule, and the glue solution channel is including being located the glue solution on the bonding connection face and holing and connecting the glue solution is provided with the breakable membrane with the connected channel of storage capsule, and the mounting groove has been seted up to the upper end of first shank portion, second shank portion, the storage capsule is located in the mounting groove, still rotate in the mounting groove of first shank portion, second shank portion and install the top and push away the eccentric wheel, push away the eccentric wheel by motor drive, push away the eccentric wheel have be used for with to be measured piece top push away the cooperation so that the bonding connection face with be measured the piece separation push away the face.
2. The strain gage of claim 1 wherein: the first leg portion is fitted to the second leg portion in a guided movable manner in the left-right direction.
3. The strain gage of claim 1 wherein: the displacement measuring mechanism comprises a flexible measuring piece, one end of the flexible measuring piece is fixed on the first supporting leg part, a measuring piece winding drum for winding the other end of the flexible measuring piece is arranged on the second supporting leg part, the displacement measuring mechanism further comprises a winding drum encoder for detecting the rotation of the measuring piece winding drum, and a winding drum spring for tensioning the flexible measuring piece is connected to the measuring piece winding drum.
4. The strain gage of claim 1 wherein: the glue solution outlet is a big belly hole with a small upper part and a big lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010508766.6A CN111780708B (en) | 2020-06-06 | 2020-06-06 | Strain gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010508766.6A CN111780708B (en) | 2020-06-06 | 2020-06-06 | Strain gauge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111780708A CN111780708A (en) | 2020-10-16 |
| CN111780708B true CN111780708B (en) | 2021-12-14 |
Family
ID=72754102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010508766.6A Active CN111780708B (en) | 2020-06-06 | 2020-06-06 | Strain gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111780708B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113029774A (en) * | 2020-06-06 | 2021-06-25 | 河南交院工程技术有限公司 | Sensor support and sensor device using same |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5577411A (en) * | 1994-06-03 | 1996-11-26 | Aluminum Company Of America | Molten metal sensing in a closed opaque vessel |
| CN2669133Y (en) * | 2003-12-19 | 2005-01-05 | 长安大学 | Double cantilever concrete structure strain measuring meter |
| CN201772973U (en) * | 2010-06-30 | 2011-03-23 | 李永信 | Automatic stress calibrator |
| CN102353598A (en) * | 2011-07-12 | 2012-02-15 | 武汉钢铁(集团)公司 | Composite strain path forming test device |
| CN102353530A (en) * | 2011-07-22 | 2012-02-15 | 上海理工大学 | Large tonnage lifting hook performance test bench |
| JP2013250120A (en) * | 2012-05-31 | 2013-12-12 | Ttes Inc | Damage detection method for structure |
| CN205642347U (en) * | 2015-11-16 | 2016-10-12 | 北京化工大学 | Vertical pressure vessel strain hardening hoop strain measurement system |
| CN106906854A (en) * | 2017-03-10 | 2017-06-30 | 中铁十四局集团有限公司 | Monitoring device and construction monitoring component |
| CN207585513U (en) * | 2017-10-24 | 2018-07-06 | 健研检测集团有限公司 | Stone arch bridge bottom surface strain gauge means under a kind of load |
| CN208012523U (en) * | 2018-04-28 | 2018-10-26 | 郑州大学 | Exempt to destroy U-shaped strain gauge |
| CN109883308A (en) * | 2019-04-19 | 2019-06-14 | 西安桥邦智能科技有限公司 | Assembling multipurpose strain gauge sensors |
| CN209432073U (en) * | 2019-03-20 | 2019-09-24 | 沈阳建筑大学 | Measure the coaxial multiple casing packaged fiber grating sensor of long gauge length of tension and compression strain |
| CN110595657A (en) * | 2019-09-23 | 2019-12-20 | 煤炭科学技术研究院有限公司 | Small-aperture 16-component conical strain gauge |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8024980B2 (en) * | 2008-01-24 | 2011-09-27 | Microstrain, Inc. | Independently calibrated wireless structural load sensor |
| CN212158549U (en) * | 2020-06-06 | 2020-12-15 | 河南交院工程技术有限公司 | Strain gauge |
-
2020
- 2020-06-06 CN CN202010508766.6A patent/CN111780708B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5577411A (en) * | 1994-06-03 | 1996-11-26 | Aluminum Company Of America | Molten metal sensing in a closed opaque vessel |
| CN2669133Y (en) * | 2003-12-19 | 2005-01-05 | 长安大学 | Double cantilever concrete structure strain measuring meter |
| CN201772973U (en) * | 2010-06-30 | 2011-03-23 | 李永信 | Automatic stress calibrator |
| CN102353598A (en) * | 2011-07-12 | 2012-02-15 | 武汉钢铁(集团)公司 | Composite strain path forming test device |
| CN102353530A (en) * | 2011-07-22 | 2012-02-15 | 上海理工大学 | Large tonnage lifting hook performance test bench |
| JP2013250120A (en) * | 2012-05-31 | 2013-12-12 | Ttes Inc | Damage detection method for structure |
| CN205642347U (en) * | 2015-11-16 | 2016-10-12 | 北京化工大学 | Vertical pressure vessel strain hardening hoop strain measurement system |
| CN106906854A (en) * | 2017-03-10 | 2017-06-30 | 中铁十四局集团有限公司 | Monitoring device and construction monitoring component |
| CN207585513U (en) * | 2017-10-24 | 2018-07-06 | 健研检测集团有限公司 | Stone arch bridge bottom surface strain gauge means under a kind of load |
| CN208012523U (en) * | 2018-04-28 | 2018-10-26 | 郑州大学 | Exempt to destroy U-shaped strain gauge |
| CN209432073U (en) * | 2019-03-20 | 2019-09-24 | 沈阳建筑大学 | Measure the coaxial multiple casing packaged fiber grating sensor of long gauge length of tension and compression strain |
| CN109883308A (en) * | 2019-04-19 | 2019-06-14 | 西安桥邦智能科技有限公司 | Assembling multipurpose strain gauge sensors |
| CN110595657A (en) * | 2019-09-23 | 2019-12-20 | 煤炭科学技术研究院有限公司 | Small-aperture 16-component conical strain gauge |
Non-Patent Citations (3)
| Title |
|---|
| Development of microscale flexible nylon/Ag strain sensor wire for real-time monitoring and damage detection in composite structures subjected to three-point bend test;Y.Qureshi等;《Composites Science and Technology》;20190908;第181卷;第107693页 * |
| 大跨度预应力混凝土桥施工应力监测;叶方谦等;《交通科技》;20041231(第4期);第1-4页 * |
| 混凝土箱梁钢悬臂拓宽法试验研究与数值模拟;李泽涛等;《土木工程与管理学报》;20181231;第35卷(第5期);第128-133页 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113029774A (en) * | 2020-06-06 | 2021-06-25 | 河南交院工程技术有限公司 | Sensor support and sensor device using same |
| CN113029774B (en) * | 2020-06-06 | 2024-07-09 | 河南交院工程技术集团有限公司 | Sensor support and sensor device using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111780708A (en) | 2020-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111780707B (en) | Strain measuring device | |
| CN111780806B (en) | Sensor and sensor support thereof | |
| CN111780708B (en) | Strain gauge | |
| CN109775212B (en) | Test production line | |
| CN212158549U (en) | Strain gauge | |
| CN109341917B (en) | Rudder force measuring device of rudder wing combined control surface for water tunnel | |
| CN212158515U (en) | Sensor holder and sensor device using the same | |
| CN113019811B (en) | Sensor device and sensor support thereof | |
| CN212158646U (en) | Sensor device and sensor support thereof | |
| CN111779925B (en) | Bridge bottom measuring part mounting equipment | |
| CN212158547U (en) | Strain measuring device | |
| ITPI20130072A1 (en) | MEASUREMENT SYSTEM OF BRAKING FORCE OF A VEHICLE | |
| CN111780792B (en) | Method for mounting measuring piece for bridge detection | |
| CN212158548U (en) | Bridge bottom measuring piece mounting equipment | |
| CN111665005B (en) | Deflection measurement method of bridge | |
| EP2192395A1 (en) | Method of checking the pulling load of an anchor fixed in a wall or ceiling | |
| CN113029774B (en) | Sensor support and sensor device using same | |
| CN110779798A (en) | Construction site engineering quality supervision auxiliary detection device and method | |
| CN210603687U (en) | Torque detection device | |
| CN212228088U (en) | Sensor and sensor support thereof | |
| CN213121032U (en) | Deflection measuring device of bridge | |
| CN207816581U (en) | One kind being used for the automatic full inspection test equipment of automobile power back door screw rod | |
| CN111665006B (en) | Deflection measurement method of bridge | |
| CN212228339U (en) | Level gauge device for bridge deflection measurement | |
| CN110926306A (en) | Guide wheel shaft detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 450000 No. 165 Nautical Middle Road, Erqi District, Zhengzhou City, Henan Province Applicant after: Henan Jiaoyuan Engineering Technology Group Co.,Ltd. Applicant after: Henan niupa Mechanical Engineering Research Institute Address before: 450000 No. 165 Nautical Middle Road, Erqi District, Zhengzhou City, Henan Province Applicant before: HENAN JIAOYUAN ENGINEERING TECHNOLOGY Co.,Ltd. Applicant before: Henan niupa Mechanical Engineering Research Institute |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |