CN102353586A - Steel strand strain measuring device - Google Patents
Steel strand strain measuring device Download PDFInfo
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- CN102353586A CN102353586A CN2011101683295A CN201110168329A CN102353586A CN 102353586 A CN102353586 A CN 102353586A CN 2011101683295 A CN2011101683295 A CN 2011101683295A CN 201110168329 A CN201110168329 A CN 201110168329A CN 102353586 A CN102353586 A CN 102353586A
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Abstract
The invention discloses a steel strand strain measuring device. The steel strand strain measuring device is characterized in that an upper end of a lower left grip block is provided with an upper left grip block connected to a displacement sensor; semicircular taper holes having inner semicircle radiuses of 3 to 9 millimeters are arranged at left and right sides of an axis of an upper end center of the lower left grip block and a lower end center of the upper left grip block; an included angle between the semicircular taper hole on the left and a side surface of the semicircular taper hole on the right is in a range of 60 to 150 degrees; each one of inner peripheries of the upper end of the lower left grip block and a lower end of the upper left grip block are provided with 2 to 5 ring grip teeth; An upper end of a lower right grip block is provided with an upper right grip block connected to a sensor support; the shape of the upper end of the lower right grip block is the same as the shape of the upper end of the lower left grip block; the shape of a lower end of the upper right grip block is the same as the shape of the lower end of the upper left grip block; a left end of a connecting rod is arranged at the displacement sensor; a right end of the connecting rod is arranged at the sensor support; the lower left grip block and the upper left grip block are connected by a screw sleeved in a spring; and the lower right grip block and the upper right grip block are connected by a screw sleeved in a spring.
Description
Technical field
The invention belongs to the equipment technical field of measuring relative displacement, be specifically related to steel strand wires displacement strain gauge means.
Background technology
Steel strand wires are that steel mill is with the cold working of carbon constructional quality steel process; Be prepared from processing technology such as strand sth. made by twisting many steel wires are tempered again; Steel strand wires have that plasticity is good, non junction, easy to use, intensity advantages of higher; Be widely used at present in the buildings of various prestressed reinforced concrete constructions, for example buildingss such as bridge, high-rise building, stadiums, departure hall, industrial premises, mine bunker.
When the prestressed reinforced concrete construction engineering construction; In order to obtain the significant data of aspects such as loss of prestress, ground tackle serviceability and tensioning process quality; Must effectively and exactly measure the strain value of steel strand wires; The particularly application of high efficient prestress in the long span building structure, the strain measurement of steel strand wires becomes more and more important.
The strain measurement of steel strand wires at present mainly contains two kinds of methods, and a kind of is on steel wire, directly to paste foil gauge, but technology difficulty is big, and the scrappage of foil gauge is very high, influence such as local bending and extruding in addition, and measurement result is very undesirable; Another kind method is on whole bundle steel strand wires, arcuate bombing leaf to be installed; Obtain the strain value of steel strand wires through the indoor standardization curve; But the disadvantage of this arc strain gauge sensors is a poor linearity; Cause measuring error bigger, its measuring accuracy can not satisfy the requirement of professional technique standard.
The patent No. is 200320109969.X, the denomination of invention Chinese patent for " two cantilever xoncrete structure strain measurement meter ", adopts an end and the strain transducer of strain bar to link, the other end and bearing link.The strain measurement meter of this structure; On-the-spot test through laboratory and bridge construction room; Prove it have highly sensitive, be easy to demarcate, linear error is little, long-time stability good, gauge length is adjustable, production cost is low, applied widely, humidity-proof ability strong, stable output signal, advantage such as easy to use; But this strain measurement meter; Can only the measurement structure thing strain of the direction in surface, and can not directly be used for the strain of tested steel twisted wire.How the strain that two cantilever xoncrete structure strain measurement meters are used for measuring steel strand wires is the technical matters that steel strand wires strain testing technical field need solve.
Summary of the invention
Technical matters to be solved by this invention is to overcome the defective of above-mentioned concrete strain meter, a kind of reasonable in design, easy for installation, good stability is provided, the steel strand wires strain gauge means that measuring accuracy is high.
Solving the problems of the technologies described above the technical scheme that is adopted is: the upper end of grip block is provided with the upper left grip block that connects with displacement transducer under a left side; The grip block center, upper end and the axial left and right sides, center, upper left grip block lower end are processed with the semi arch bellmouth under the left side; The radius of semicircle is 3.1～9.0mm in left side semi arch bellmouth and the right side semi arch bellmouth; Angle between left side semi arch bellmouth and the semi arch bellmouth side, right side is 60 °～150 °; The upper end of bottom right grip block is provided with the upper right grip block that connects with sensor support base; The grip block center, upper end, bottom right and the axial left and right sides, center, upper right grip block lower end are processed with the semi arch bellmouth; The radius of the interior semicircle of left side semi arch bellmouth and right side semi arch bellmouth is 3.1～9.0mm; Angle between left side semi arch bellmouth and the semi arch bellmouth side, right side is 60 °～150 °; The left end of connecting rod is set in place on the displacement sensor; Right-hand member is arranged on the sensor support base; The lower end inner periphery of the upper end of grip block and upper left grip block is provided with 2～5 circle clamping teeth under the left side; The lower end inner periphery of the upper end of bottom right grip block and upper right grip block is provided with 2～5 circle clamping teeth; Grip block connects with the screw rod that overlaps in the spring of packing into upper left grip block under the left side, and the bottom right grip block connects with the screw rod that overlaps in the spring of packing into upper right grip block.
The clamping gear ring number of grip block upper end is identical with the clamping gear ring number of upper left grip block lower end under the left side of the present invention, and the clamping gear ring number of bottom right grip block upper end is identical with the clamping gear ring number of the clamping gear ring number of upper right grip block lower end, following grip block upper end.
The tooth depth of clamping tooth of the present invention is 0.3～1mm, and tooth angle α is 30 °～90 °, and tooth depth the best of clamping tooth is 0.5mm, and tooth angle α the best is 60 °.
The present invention adopts a left side down to be processed with 2～5 circle clamping teeth on the lower end inner periphery of upper end and the upper left grip block of grip block; Be processed with 2～5 circle clamping teeth on the lower end inner periphery of the upper end of bottom right grip block and upper right grip block; Left side grip block down connects with the screw rod that overlaps in the spring of packing into upper right grip block with upper left grip block, bottom right grip block; Guaranteed the reliability of clamping in the steel strand wires drawing process; Avoid the relative slippage between grip block and steel strand wires, improved the measuring accuracy of displacement transducer.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is a upper left grip block 2 and the left connection synoptic diagram of grip block 9 down among Fig. 1.
Fig. 3 is the A-A cut-open view of Fig. 2.
Fig. 4 is the structural representation of displacement transducer 1 among Fig. 1.
Embodiment
To further explain of the present invention, but the invention is not restricted to these embodiment below in conjunction with accompanying drawing and embodiment.
In Fig. 1,2,3, grip block 9, spring 10, screw rod 11 connections constitute the steel strand wires strain gauge means of present embodiment down by displacement transducer 1, upper left grip block 2, connecting rod 3, sensor support base 4, wing nut 5, bottom right grip block 6, upper right grip block 7, a left side.
The both sides of grip block 9 short transverse center lines respectively are processed with 1 hole under a left side; Axial left side, center, grip block 9 upper end is processed with the semi arch bellmouth down, axially the right side is processed with the semi arch bellmouth on a left side; The radius of the interior semicircle of the left side semi arch bellmouth of grip block 9 and right side semi arch bellmouth is 6.35mm under the left side; Angle between left side semi arch bellmouth and the semi arch bellmouth side, right side is 100 °; 3 circle clamping teeth are processed on the grip block 9 upper end inner peripherys down in a left side, and the left side tooth depth of the clamping tooth of grip block 9 down is that 0.5mm, tooth angle α are 60 °.The both sides of upper left grip block 2 short transverse center lines respectively are processed with 1 screw; Center, upper left grip block 2 lower end axially left side is processed with the semi arch bellmouth; Axially the right side is processed with the semi arch bellmouth; The radius of semicircle is 6.35mm in the left side semi arch bellmouth of upper left grip block 2 and the right side semi arch bellmouth; Angle between upper left grip block 2 left side semi arch bellmouths and the semi arch bellmouth side, right side is 100 °; Be processed into 3 circle clamping teeth on the upper left grip block 2 lower end inner peripherys, the tooth depth of the clamping tooth of upper left grip block 2 is 0.5mm; Tooth angle α is 60 °.The upper end of upper left grip block 2 is with the screw threads for fastening connector displacement transducer 1 that has been fixedly connected, and the deformation signal that displacement transducer 1 is used to receive steel strand wires to be tested converts electric signal output to.The geometry of the geometry of bottom right grip block 6 and lower-left grip block 9 is identical; The geometry of the geometry of upper right grip block 7 and upper left grip block 2 is identical; When measuring the strain of steel strand wires 8; Upper left grip block 2 and lower-left grip block 9 are clamped in the left side of tested steel strand wires 8; Upper right grip block 7 and bottom right grip block 6 are clamped in the right side of tested steel strand wires 8; Two screw rods 11 penetrate respectively in the spring 10 by thread connection with lower-left grip block 9 and upper left grip block 2 be linked together; In addition two screw rods 11 penetrate respectively in the spring 10 by thread connection with bottom right grip block 6 and upper right grip block 7 be linked together; Spring 10 is used to guarantee that chucking power is constant; Thereby guaranteed the reliability of clamping; Avoid the relative slippage between grip block and steel strand wires, improved the certainty of measurement of displacement transducer.The present invention is employed in upper left grip block 2 lower ends, a left side descends grip block 9 upper ends, upper right grip block 7 lower ends, bottom right grip block 6 upper ends to be processed into the wheel flange of said structure, has improved the sensitivity and the precision of tested steel twisted wire dependent variable greatly.The upper end of upper right grip block 7 is equipped with sensor support base 4 through thread connection.The left end of connecting rod 3 is installed on the displacement transducer 1, right-hand member is fixed on the sensor support base 4 with wing nut 5.
In Fig. 4, the sensor 1 of present embodiment is that foil gauge 1-17, upper left foil gauge 1-18 connection constitute down by housing 1-1, upper end cover 1-2, left spring sheet 1-3, output plug 1-4, last cushion block 1-5, upper right foil gauge 1-6, stiff end fixture block 1-7, right spring leaf 1-8, bottom right foil gauge 1-9, auxiliary connecting rod 1-10, lower cushion block 1-11, bottom end cover 1-12, potentiometer 1-13, bottom end cover thermofin 1-14, nut 1-15, housing thermofin 1-16, a left side.
Upper end in housing 1-1 is equipped with upper end cover 1-2; The lower end is equipped with bottom end cover 1-12; The left side of the symmetrical center line in housing 1 is equipped with left spring sheet 1-3; The right side is equipped with right spring leaf 1-8; Left spring sheet 1-3 and right spring leaf 1-8 are used to experience the relative displacement of concrete component; And generation deformation; On between left spring sheet 1-3 and the right spring leaf 1-8 cushion block 1-5 is installed; Under lower cushion block 1-11 is installed; The top of left spring sheet 1-3 and right spring leaf 1-8 is inserted and secured in the stiff end fixture block 1-7; Stiff end fixture block 1-7 is installed in upper end cover 1-2 bottom; The thickness of left spring sheet 1-3 and right spring leaf 1-8 is 0.6mm; The length of left spring sheet 1-3 and right spring leaf 1-8 is 60mm, and the distance between left spring sheet 1-3 and the right spring leaf 1-8 is 5mm.Through changing left spring sheet 1-3 and the thickness of right spring leaf 1-8 or the length of left spring sheet 1-3 and right spring leaf 1-8, adjust output sensitivity of the present invention and strain measurement scope at an easy rate, can produce the sensor 1 of various different resolutions.Be bonded with on the lateral surface of left spring sheet 1-3 upper left foil gauge 1-17, down be bonded with a left side under foil gauge 1-16; On the lateral surface of right spring leaf 1-8, be bonded with upper right foil gauge 1-6, be bonded with bottom right foil gauge 1-9 down, also can foil gauge 1-16 be bonded on the medial surface of left spring sheet 1-3 down, upper right foil gauge 1-6 and bottom right foil gauge 1-9 be bonded on the medial surface of right spring leaf 1-8 with upper left foil gauge 1-17 and a left side.Be placed with thermofin 1-14 on side in housing 1-1 and the bottom end cover 1-12; When thermofin 1-14 is used for outer atmospheric temperature and changes, can not cause upper left foil gauge 1-18, a left side down foil gauge 1-17, upper right foil gauge 1-6, bottom right foil gauge 1-9 deforms and influence measuring accuracy.Potentiometer 1-13 is installed on the bottom end cover 1-12 in housing 1-1; Upper left foil gauge 1-18; A left side is foil gauge 1-17 down; Upper right foil gauge 1-6; Bottom right foil gauge 1-9 connects into bridge circuit; The end of potentiometer 1-13 is connected with the left end of foil gauge 1-17 down with upper left foil gauge 1-18 with adjustable end; Another termination 2v positive source; The end of upper right foil gauge 1-6 and bottom right foil gauge 1-9 is connected with output plug 1-4 through lead; Another termination 2v power cathode; Output plug 1-4 is connected with strainmeter through cable; Resistance variations through adjustment potentiometer 1-13 can change output sensitivity of the present invention.The bottom of left spring sheet 1-3 and right spring leaf 1-8 is equipped with auxiliary connecting rod 1-10 through thread connection in housing 1-1; The right-hand member of auxiliary connecting rod 1-10 is processed with internal thread, left end are fixed on left spring sheet 1-3 and right spring leaf 1-8 with nut 1-14 bottom; The right-hand member of auxiliary connecting rod 1-10 stretches out outside the right flank of housing 1-1; Right-hand member at auxiliary connecting rod 1-10 is processed with screw, and screw is used for connecting with the end of connecting rod 3.
Be processed into 3 circle clamping teeth under the left side of present embodiment on the grip block 9 upper end inner peripherys; The left side tooth depth of the clamping tooth of grip block 9 down is that 0.5mm, tooth angle α are 30 °; Be processed into 3 circle clamping teeth on the upper left grip block 2 lower end inner peripherys, the tooth depth of the clamping tooth of upper left grip block 2 is that 0.5mm, tooth angle α are 30 °.The geometric configuration of bottom right grip block 6 is identical with the geometric configuration of left grip block 9 down, and the geometric configuration of the geometric configuration of upper right grip block 7 and upper left grip block 2 is identical.The connecting relation of other parts and parts is identical with embodiment 1.
Be processed into 3 circle clamping teeth under the left side of present embodiment on the grip block 9 upper end inner peripherys; The left side tooth depth of the clamping tooth of grip block 9 down is that 0.5mm, tooth angle α are 90 °; Be processed into 3 circle clamping teeth on the upper left grip block 2 lower end inner peripherys, the tooth depth of the clamping tooth of upper left grip block 2 is that 0.5mm, tooth angle α are 90 °.The geometric configuration of bottom right grip block 6 is identical with the geometric configuration of left grip block 9 down, and the geometric configuration of the geometric configuration of upper right grip block 7 and upper left grip block 2 is identical.The connecting relation of other parts and parts is identical with embodiment 1.
In above embodiment 1～3; 3 circle clamping teeth are processed on the grip block 9 upper end inner peripherys down in a left side; The left side tooth depth of the clamping tooth of grip block 9 down is that 0.3mm, tooth angle are identical with respective embodiments; Be processed into 3 circle clamping teeth on the upper left grip block 2 lower end inner peripherys, the tooth depth of the clamping tooth of upper left grip block 2 is that 0.3mm, tooth angle are identical with respective embodiments.The geometric configuration of bottom right grip block 6 is identical with the geometric configuration of left grip block 9 down, and the geometric configuration of the geometric configuration of upper right grip block 7 and upper left grip block 2 is identical.The connecting relation of other parts and parts is identical with embodiment 1.
In above embodiment 1～3; 3 circle clamping teeth are processed on the grip block 9 upper end inner peripherys down in a left side; The left side tooth depth of the clamping tooth of grip block 9 down is that 1mm, tooth angle are identical with respective embodiments; Be processed into 3 circle clamping teeth on the upper left grip block 2 lower end inner peripherys, the tooth depth of the clamping tooth of upper left grip block 2 is that 1mm, tooth angle are identical with respective embodiments.The geometric configuration of bottom right grip block 6 is identical with the geometric configuration of left grip block 9 down, and the geometric configuration of the geometric configuration of upper right grip block 7 and upper left grip block 2 is identical.The connecting relation of other parts and parts is identical with embodiment 1.
In above embodiment 1～5; Axial left side, center, grip block 9 upper end is processed with the semi arch bellmouth down, axially the right side is processed with the semi arch bellmouth on a left side; The radius of the interior semicircle of the left side semi arch bellmouth of grip block 9 and right side semi arch bellmouth is 3.1mm under the left side; Angle between left side semi arch bellmouth and the semi arch bellmouth side, right side is 60 °, and 2 circle clamping teeth are processed on the grip block 9 upper end inner peripherys down in a left side.Axially the left side is processed with the semi arch bellmouth to center, upper left grip block 2 lower end, axially the right side is processed with the semi arch bellmouth; The radius of semicircle is 3.1mm in the left side semi arch bellmouth of upper left grip block 2 and the right side semi arch bellmouth; Angle between upper left grip block 2 left side semi arch bellmouths and the semi arch bellmouth side, right side is 60 °, is processed into 2 circle clamping teeth on the upper left grip block 2 lower end inner peripherys.The upper end of bottom right grip block 6 is identical with the geometric configuration of left grip block 9 upper ends down; Upper right grip block 7 lower ends are identical with the geometric configuration of upper left grip block 2 lower ends, and upper left grip block 2, a left side other structure of grip block 9, upper right grip block 7, bottom right grip block 6 down are identical with respective embodiments.The connecting relation of other parts and parts is identical with embodiment 1.
In above embodiment 1～5; Axial left side, center, grip block 9 upper end is processed with the semi arch bellmouth down, axially the right side is processed with the semi arch bellmouth on a left side; The radius of the interior semicircle of the left side semi arch bellmouth of grip block 9 and right side semi arch bellmouth is 9.0mm under the left side; Angle between left side semi arch bellmouth and the semi arch bellmouth side, right side is 150 °, and 5 circle clamping teeth are processed on the grip block 9 upper end inner peripherys down in a left side.Axially the left side is processed with the semi arch bellmouth to center, upper left grip block 2 lower end, axially the right side is processed with the semi arch bellmouth; The radius of semicircle is 9.0mm in the left side semi arch bellmouth of upper left grip block 2 and the right side semi arch bellmouth; Angle between upper left grip block 2 left side semi arch bellmouths and the semi arch bellmouth side, right side is 150 °, is processed into 5 circle clamping teeth on the upper left grip block 2 lower end inner peripherys.The upper end of bottom right grip block 6 is identical with the geometric configuration of left grip block 9 upper ends down; Upper right grip block 7 lower ends are identical with the geometric configuration of upper left grip block 2 lower ends, and upper left grip block 2, a left side other structure of grip block 9, upper right grip block 7, bottom right grip block 6 down are identical with respective embodiments.The connecting relation of other parts and parts is identical with embodiment 1.
Claims (4)
1. steel strand wires strain gauge means; The upper end of grip block under a left side (9) is provided with the upper left grip block (2) that connects with displacement transducer (1); Grip block (9) center, upper end and the axial left and right sides, upper left grip block (2) center, lower end are processed with the semi arch bellmouth under the left side; The radius of semicircle is 3.1～9.0mm in left side semi arch bellmouth and the right side semi arch bellmouth; Angle between left side semi arch bellmouth and the semi arch bellmouth side, right side is 60 °～150 °; The upper end of bottom right grip block (6) is provided with the upper right grip block (7) that connects with sensor support base (4); Bottom right grip block (6) center, upper end and the axial left and right sides, upper right grip block (2) center, lower end are processed with the semi arch bellmouth; The radius of the interior semicircle of left side semi arch bellmouth and right side semi arch bellmouth is 3.1～9.0mm; Angle between left side semi arch bellmouth and the semi arch bellmouth side, right side is 60 °～150 °; (3 left end is set in place displacement sensor (on 1 to connecting rod; Right-hand member is arranged on the sensor support base (4); It is characterized in that: the lower end inner periphery of the upper end of grip block under the left side (9) and upper left grip block (2) is provided with 2～5 circle clamping teeth; The lower end inner periphery of the upper end of bottom right grip block (6) and upper right grip block (7) is provided with 2～5 circle clamping teeth; Grip block (9) connects with the screw rod (11) that overlaps in the spring (10) of packing into upper left grip block (2) under the left side, and bottom right grip block (6) connects with the screw rod (11) that overlaps in the spring (10) of packing into upper right grip block (7).
2. according to the described steel strand wires strain gauge means of claim 1; It is characterized in that: the clamping gear ring number of grip block under the said left side (9) upper end is identical with the clamping gear ring number of upper left grip block (2) lower end, and the clamping gear ring number of bottom right grip block (6) upper end is identical with the clamping gear ring number of the clamping gear ring number of upper right grip block (7) lower end, following grip block (3) upper end.
3. according to claim 1 or 2 described steel strand wires strain gauge means, it is characterized in that: the tooth depth of said clamping tooth is 0.3～1mm, and tooth angle α is 30 °～90 °.
4. according to the described steel strand wires strain gauge means of claim 3, it is characterized in that: the tooth depth of said clamping tooth is 0.5mm, and tooth angle α is 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101683295A CN102353586A (en) | 2011-06-22 | 2011-06-22 | Steel strand strain measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101683295A CN102353586A (en) | 2011-06-22 | 2011-06-22 | Steel strand strain measuring device |
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| CN102353586A true CN102353586A (en) | 2012-02-15 |
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| CN2011101683295A Pending CN102353586A (en) | 2011-06-22 | 2011-06-22 | Steel strand strain measuring device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914470A (en) * | 2012-11-15 | 2013-02-06 | 上海城建市政工程（集团）有限公司 | Device and method for testing concrete sample beam stiffness |
| CN109520465A (en) * | 2019-01-08 | 2019-03-26 | 同济大学 | The fixed device of the adjustable strain transducer of gauge length |
| CN109540083A (en) * | 2019-01-08 | 2019-03-29 | 同济大学 | From locking introversion formula strain transducer rapid installation device |
| 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 |
| CN110441145A (en) * | 2019-08-27 | 2019-11-12 | 青岛理工大学 | Tunnel lining concrete durability test method |
| CN112362493A (en) * | 2020-09-30 | 2021-02-12 | 中汽研（天津）汽车工程研究院有限公司 | Control method for hot compression test of thin plate |
| CN112362508A (en) * | 2020-09-30 | 2021-02-12 | 中汽研（天津）汽车工程研究院有限公司 | Low-cycle strain fatigue control method for thin plate |
| CN112577389A (en) * | 2021-01-15 | 2021-03-30 | 上海闲弄汽车用品有限公司 | High check out test set of batch gear tooth |
| CN113883998A (en) * | 2021-12-06 | 2022-01-04 | 山东隽宇电子科技有限公司 | Construction site cable detection equipment |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914470A (en) * | 2012-11-15 | 2013-02-06 | 上海城建市政工程（集团）有限公司 | Device and method for testing concrete sample beam stiffness |
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| CN109520465A (en) * | 2019-01-08 | 2019-03-26 | 同济大学 | The fixed device of the adjustable strain transducer of gauge length |
| CN109540083A (en) * | 2019-01-08 | 2019-03-29 | 同济大学 | From locking introversion formula strain transducer rapid installation device |
| CN109540083B (en) * | 2019-01-08 | 2024-05-03 | 同济大学 | Self-locking inward-tilting type quick mounting device for strain sensor |
| 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 |
| CN110441145B (en) * | 2019-08-27 | 2021-08-17 | 青岛理工大学 | Tunnel lining concrete durability test method |
| CN110441145A (en) * | 2019-08-27 | 2019-11-12 | 青岛理工大学 | Tunnel lining concrete durability test method |
| CN112362508A (en) * | 2020-09-30 | 2021-02-12 | 中汽研（天津）汽车工程研究院有限公司 | Low-cycle strain fatigue control method for thin plate |
| CN112362493A (en) * | 2020-09-30 | 2021-02-12 | 中汽研（天津）汽车工程研究院有限公司 | Control method for hot compression test of thin plate |
| CN112577389A (en) * | 2021-01-15 | 2021-03-30 | 上海闲弄汽车用品有限公司 | High check out test set of batch gear tooth |
| CN112577389B (en) * | 2021-01-15 | 2022-09-27 | 江花集团有限公司 | High check out test set of batch gear tooth |
| CN113883998A (en) * | 2021-12-06 | 2022-01-04 | 山东隽宇电子科技有限公司 | Construction site cable detection equipment |
| CN113883998B (en) * | 2021-12-06 | 2022-03-08 | 山东隽宇电子科技有限公司 | Construction site cable detection equipment |
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Application publication date: 20120215 |