CN113405923A - Torsion test device for optical cable - Google Patents
Torsion test device for optical cable Download PDFInfo
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- CN113405923A CN113405923A CN202110576202.0A CN202110576202A CN113405923A CN 113405923 A CN113405923 A CN 113405923A CN 202110576202 A CN202110576202 A CN 202110576202A CN 113405923 A CN113405923 A CN 113405923A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 111
- 238000012360 testing method Methods 0.000 title claims abstract description 93
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 238000005096 rolling process Methods 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims description 7
- 230000010405 clearance mechanism Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 239000003351 stiffener Substances 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 3
- 210000002414 leg Anatomy 0.000 claims 6
- 210000003127 knee Anatomy 0.000 claims 1
- 238000000034 method Methods 0.000 description 12
- 238000004140 cleaning Methods 0.000 description 11
- 238000005452 bending Methods 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
- G01N3/26—Investigating twisting or coiling properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor
-
- 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
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- 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
- G01N2203/0014—Type of force applied
- G01N2203/0021—Torsional
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- 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
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
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- General Health & Medical Sciences (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
The invention relates to the technical field of optical cable testing equipment and discloses a torsion testing device for an optical cable, which comprises a top plate, wherein supporting legs are fixedly connected to four corners of the lower surface of the top plate, the outer walls of a plurality of supporting legs are fixedly connected with a supporting plate and a counterweight plate together, two circular through holes are formed in the upper surface of the top plate, a rolling bearing is fixedly connected to the hole wall of each circular through hole, a rotating rod is fixedly connected to the inner wall of each rolling bearing, and a linkage mechanism is fixedly connected to the upper surface of the top plate. This a twist reverse test device for optical cable can effectively improve the convenience and the efficiency that optical cable twist reverse test device used, has improved optical cable twist reverse test's efficiency simultaneously to can avoid external factor to disturb, improve the accuracy that optical cable twists reverse test data, and not only make the twist reverse test device have the optical cable clearance function, can also improve the stability that twist reverse test device placed, and the guarantee twists reverse the reliability of test device work.
Description
Technical Field
The invention relates to the technical field of optical cable testing equipment, in particular to a torsion testing device for an optical cable.
Background
The optical cable is a communication cable assembly which uses one or more optical fibers as transmission media and can be used individually or in groups, wherein the optical cable is mainly composed of optical fibers (such as glass fibers of hair), a plastic protective sleeve and a plastic outer skin, the optical cable is a cable core composed of a certain number of optical fibers according to a certain mode, the optical cable is externally coated with a sheath, and is also coated with an outer protective layer to realize a communication line of optical signal transmission, and the torsion test of the optical cable is an indispensable link for monitoring and detecting the quality of optical cable products and even for optical cable manufacturers to grasp the quality of the optical cable.
The torsion test process of the existing optical cable is inconvenient, the optical cable needs to be tested firstly and then is tested, the process is time-consuming, the efficiency and convenience of the torsion test of the optical cable are affected, and external interference factors are more, if the clamping positions are not uniform every time, the accuracy of the torsion test data of the optical cable is easily affected, and the using effect of the torsion test device of the optical cable is affected.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the torsion test device for the optical cable, which can effectively improve the convenience and the efficiency of the use of the torsion test device for the optical cable, simultaneously improve the efficiency of the torsion test for the optical cable, avoid the interference of external factors, improve the accuracy of data of the torsion test for the optical cable, ensure that the torsion test device has an optical cable cleaning function, improve the placing stability of the torsion test device, ensure the working reliability of the torsion test device, and solve the problems that the torsion test process of the existing optical cable is inconvenient, the optical cable needs to be tested firstly and then is tested, the efficiency and the convenience of the torsion test for the optical cable are influenced, external interference factors are more, the accuracy of the data of the torsion test for the optical cable is easily influenced, and the use effect of the torsion test device for the optical cable is influenced.
(II) technical scheme
In order to achieve the purposes of effectively improving the convenience and the efficiency of the optical cable torsion test device, simultaneously improving the efficiency of an optical cable torsion test, improving the accuracy of data of the optical cable torsion test, enabling the torsion test device to have an optical cable cleaning function, improving the placing stability of the torsion test device and ensuring the working reliability of the torsion test device, the invention provides the following technical scheme: a torsion test device for an optical cable comprises a top plate, wherein supporting legs are fixedly connected to four corners of the lower surface of the top plate, a supporting plate and a counterweight plate are fixedly connected to the outer walls of a plurality of supporting legs together, two circular through holes are formed in the upper surface of the top plate, rolling bearings are fixedly connected to the hole walls of the circular through holes, rotating rods are fixedly connected to the inner walls of the rolling bearings, a linkage mechanism is fixedly connected to the upper surface of the top plate, a torsion meter and two fixing rods are fixedly connected to the upper surface of the supporting plate, a supporting plate is movably connected to the connecting end of the torsion meter, a first chuck is fixedly connected to the upper surface of the supporting plate and the lower surface of one of the rotating rods, two bending rods are fixedly connected to the bottom end of the other rotating rod, a second chuck is fixedly connected to the rod walls of the two bending rods and the fixing rods, and, the output end and the input end of the optical cable test equipment are both connected with connectors through lead signals, the upper surface of the counterweight plate is fixedly connected with a cleaning mechanism, and the lower surface of the counterweight plate is fixedly connected with an anti-skidding mechanism.
Preferably, the linkage mechanism comprises a driving motor fixedly connected with the upper surface of the top plate, the output end of the driving motor is fixedly connected with a first helical gear, two chain wheels are fixedly sleeved on the rod walls of the rotating rods, two chains are sleeved on the outer walls of the chain wheels, one chain wheel is fixedly sleeved on the outer wall of the chain wheel, and the outer wall of the second helical gear is vertically meshed with the outer wall of the first helical gear.
Preferably, the cleaning mechanism comprises two supporting blocks fixedly connected with the upper surface of the counterweight plate, the upper surface of each supporting block is fixedly connected with two limiting rods, the rod walls of the two limiting rods are jointly sleeved with a pressing block, the top ends of the two limiting rods are jointly fixedly connected with a stop block, the rod walls of the two limiting rods are movably sleeved with springs, and the supporting blocks and the pressing block are fixedly connected with a cleaning sponge block on the opposite side.
Preferably, anti-skidding mechanism includes two L shaped plates with counterweight plate lower surface fixed connection, two the common sliding connection in one side that the L shaped plate is relative has the non slipping spur, the threaded hole has been seted up to the lateral wall of L shaped plate, and the pore wall threaded connection of threaded hole has fixing bolt, the lateral wall of non slipping spur is seted up and is connected logical groove with L shaped plate lateral wall matched with.
Preferably, the upper surfaces of the two pressing blocks are fixedly connected with a U-shaped pull rod.
Preferably, the lower surfaces of the supporting legs are fixedly connected with universal wheels, and the lower surfaces of the universal wheels and the lower surfaces of the anti-skid blocks are located on the same horizontal plane.
Preferably, the outer wall of the two connectors is fixedly connected with two fixing ropes.
Preferably, the outer walls of two of the supporting legs are fixedly connected with a U-shaped push rod.
Preferably, the lower surface of the optical cable test equipment is fixedly connected with a reinforcing rod in an inclined mode, and the bottom end of the reinforcing rod is fixedly connected with the outer wall of the supporting leg.
(III) advantageous effects
Compared with the prior art, the invention provides a torsion test device for an optical cable, which has the following beneficial effects:
1. the torsion test device for the optical cable is provided with a first chuck, a second chuck, a linkage mechanism, a torsion meter and optical cable test equipment, when the optical cable needs to be subjected to torsion test, firstly two optical cables with the same specification are taken out and respectively placed at the first chuck and the second chuck, two ends of each optical cable are fixed through the first chuck and the second chuck, two ends of each optical cable at the second chuck are respectively connected with a connector through signals, at the moment, the signals sent by the optical cable test equipment can completely penetrate through the optical cable and be received, then a driving motor is started, the driving motor enables a rotating rod to rotate through a first bevel gear and a second bevel gear, the two rotating rods synchronously rotate through a chain wheel and a chain, the rotating rod can twist the optical cables through the first chuck and the second chuck, the torsion meter can measure the torsion force born by the optical cable in real time in the torsion process of the second chuck and continuously twists, the staff observes the torsion meter, optical cable surface and optical cable test equipment, then in time stop driving motor when the signal that optical cable test equipment sent can't pass the optical cable, and the data of record torsion meter, this process does not need flat frequent installation optical cable, and twist reverse and test and go on in step, labour saving and time saving, this mechanism can effectively improve the optical cable and twist reverse convenience and the efficiency that test device used, improved the optical cable simultaneously and twisted reverse experimental efficiency, and can avoid external factor interference, the accuracy of optical cable torsion test data has been improved.
2. This a twist reverse test device for optical cable, through anti-skidding mechanism and clearance mechanism, spring force promotes the briquetting among the clearance mechanism, when the optical cable surface needs the clearance, pass two sponge clearance pieces to the optical cable, then take out the optical cable, make the optical cable surface can be cleaned fast by sponge clearance piece, in addition when twisting reverse test device and using, through inserting the non-skidding piece in the L shaped plate, it is fixed that rotatory fixing bolt is again afterwards, enlarge the ground connection area of device, improve the stability that twists reverse test device and place, this mechanism not only makes twist reverse test device have the optical cable clearance function, can also improve the stability that twist reverse test device placed, guarantee twists reverse test device reliability of work.
Drawings
Fig. 1 is a schematic structural view of a torsion testing apparatus for an optical cable according to the present invention;
FIG. 2 is a schematic structural view of a portion A of a torsion testing apparatus for an optical fiber cable according to the present invention;
FIG. 3 is a schematic structural view of a portion B of a torsion testing apparatus for an optical cable according to the present invention;
fig. 4 is a schematic structural diagram of a portion C of a torsion testing apparatus for an optical cable according to the present invention.
In the figure: 1 top plate, 2 supporting legs, 3 supporting plates, 4 weight plates, 5 rolling bearings, 6 rotating rods, 7 linkage mechanisms, 71 driving motors, 72 first bevel gears, 73 chain wheels, 74 chains, 75 second bevel gears, 8 cleaning mechanisms, 81 supporting blocks, 82 limiting rods, 83 pressing blocks, 84 stoppers, 85 springs, 86 cleaning sponge blocks, 9 anti-skidding mechanisms, 91L-shaped plates, 92 anti-skidding blocks, 93 fixing bolts, 94 connecting through grooves, 10 torsion meters, 11 fixing rods, 12 supporting plates, 13 first chucks, 14 bent rods, 15 second chucks, 16 optical cable testing equipment, 17 connectors, 18U-shaped pull rods, 19 universal wheels, 20 fixing ropes, 21U-shaped push rods and 22 reinforcing rods.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a torsion test apparatus for an optical cable includes a top plate 1, supporting legs 2 are fixedly connected to four corners of a lower surface of the top plate 1, a supporting plate 3 and a weight plate 4 are fixedly connected to outer walls of the supporting legs 2, two circular through holes are formed in an upper surface of the top plate 1, rolling bearings 5 are fixedly connected to walls of the circular through holes, rotating rods 6 are fixedly connected to inner walls of the rolling bearings 5, a linkage mechanism 7 is fixedly connected to an upper surface of the top plate 1, a torsion meter 10 and two fixing rods 11 are fixedly connected to an upper surface of the supporting plate 3, a supporting plate 12 is movably connected to a connecting end of the torsion meter 10, a first chuck 13 is fixedly connected to an upper surface of the supporting plate 12 and a lower surface of one of the rotating rods 6, two bending rods 14 are fixedly connected to a bottom end of the other rotating rod 6, and second chucks 15 are fixedly connected to rod walls of the two bending rods 14 and the fixing rods 11, the outer wall fixedly connected with optical cable test equipment 16 of one of them supporting leg 2, optical cable test equipment 16's output and input all have connector 17 through wire signal connection, and the last fixed surface of weight plate 4 is connected with clearance mechanism 8, and the lower fixed surface of weight plate 4 is connected with anti-skidding mechanism 9.
The linkage mechanism 7 comprises a driving motor 71 fixedly connected with the upper surface of the top plate 1, the output end of the driving motor 71 is fixedly connected with a first bevel gear 72, the rod walls of the two rotating rods 6 are fixedly sleeved with chain wheels 73, the outer walls of the two chain wheels 73 are sleeved with chains 74 together, the outer wall of one chain wheel 73 is fixedly sleeved with a second bevel gear 75, and the outer wall of the second bevel gear 75 is vertically meshed with the outer wall of the first bevel gear 72.
The upper surfaces of the two pressing blocks 83 are fixedly connected with a U-shaped pull rod 18, and the pressing blocks 83 can be conveniently lifted by the U-shaped pull rod 18.
The equal fixedly connected with universal wheel 19 of lower surface of a plurality of supporting legs 2, the lower surface of universal wheel 19 and non slipping spur 92's lower surface are in same horizontal plane, and universal wheel 19 can make things convenient for the device to remove, improves the convenience of its removal.
Two fixed ropes 20 of the equal fixedly connected with of outer wall of two connectors 17, fixed rope 20 can ensure the stability that connector 17 and optical cable are connected.
Wherein the outer wall of two supporting legs 2 is fixedly connected with U-shaped push rod 21 jointly, and U-shaped push rod 21 can make things convenient for thrust unit to remove.
Lower surface slope fixedly connected with stiffener 22 of optical cable test equipment 16, the bottom of stiffener 22 and the outer wall fixed connection of supporting leg 2, stiffener 22 can improve the stability that optical cable test equipment 16 placed.
In summary, when the optical cable torsion test apparatus for optical cables needs to perform torsion test, firstly, two optical cables with the same specification are taken out and respectively placed at the first chuck 13 and the second chuck 15, two ends of the optical cables are fixed through the first chuck 13 and the second chuck 15, two ends of the optical cables at the second chuck 15 are respectively connected with the connecting head 17 through signals, at this time, the optical cable test apparatus 16 sends signals which can completely penetrate through the optical cables and be received, then the driving motor 71 is started, the driving motor 71 rotates the rotating rod 6 through the first bevel gear 72 and the second bevel gear 75, the two rotating rods 6 rotate synchronously through the chain wheel 73 and the chain 74, the rotating rod 6 twists the optical cables through the first chuck 13 and the second chuck 15, the second chuck 15 measures the torsion force born by the torsion meter 10 in real time during twisting, the torsion is continuously twisted, and a worker observes the torsion meter 10, The optical cable surface and the optical cable testing equipment 16, if the signal sent by the optical cable testing equipment 16 can not pass through the optical cable, the driving motor 71 is stopped in time, and the data of the torsion meter 10 is recorded, the process does not need to install the optical cable frequently, and the twisting and the testing are carried out synchronously, time and labor are saved, the mechanism can effectively improve the convenience and the efficiency of the use of the optical cable twisting testing device, simultaneously improve the efficiency of the optical cable twisting test, avoid the interference of external factors, improve the accuracy of the data of the optical cable twisting test, when the optical cable surface needs to be cleaned, the optical cable passes through two sponge cleaning blocks 86, then the optical cable is drawn out, so that the optical cable surface can be cleaned quickly by the sponge cleaning blocks 86, in addition, when the twisting test device is used, the antiskid blocks 92 are inserted into the L-shaped plate 91 and then the fixing bolts 93 are rotated to fix, so as to enlarge the grounding area of the device, the stability of torsion test device placing is improved, the mechanism not only enables the torsion test device to have the optical cable cleaning function, but also can improve the stability of torsion test device placing, and the reliability of torsion test device work is guaranteed.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A torsion test device for optical cables, comprising a top plate (1), characterized in that: the supporting legs (2) are fixedly connected to four corners of the lower surface of the top plate (1), the outer walls of the supporting legs (2) are fixedly connected with a supporting plate (3) and a counterweight plate (4) together, two circular through holes are formed in the upper surface of the top plate (1), rolling bearings (5) are fixedly connected to the hole walls of the circular through holes, rotating rods (6) are fixedly connected to the inner walls of the rolling bearings (5), a linkage mechanism (7) is fixedly connected to the upper surface of the top plate (1), a torsion meter (10) and two fixing rods (11) are fixedly connected to the upper surface of the supporting plate (3), a connecting end of the torsion meter (10) is movably connected with a supporting plate (12), a first chuck (13) is fixedly connected to the upper surface of one of the supporting plate (12) and the lower surface of one of the rotating rods (6), and two bent rods (14) are fixedly connected to the bottom end of the rotating rod (6), two equal fixedly connected with second chuck (15) of pole wall of knee (14) and dead lever (11), one of them the outer wall fixedly connected with optical cable test equipment (16) of supporting leg (2), the output and the input of optical cable test equipment (16) all have connector (17) through wire signal connection, the last fixed surface of counterweight plate (4) is connected with clearance mechanism (8), the lower fixed surface of counterweight plate (4) is connected with anti-skidding mechanism (9).
2. A torsion test apparatus for optical cable according to claim 1, wherein: the linkage mechanism (7) comprises a driving motor (71) fixedly connected with the upper surface of the top plate (1), the output end of the driving motor (71) is fixedly connected with a first bevel gear (72), two chain wheels (73) are fixedly sleeved on the rod wall of the rotating rod (6), two chains (74) are sleeved on the outer wall of each chain wheel (73), one chain wheel (73) is fixedly sleeved with a second bevel gear (75), and the outer wall of each second bevel gear (75) is vertically meshed with the outer wall of the first bevel gear (72).
3. A torsion test apparatus for optical cable according to claim 1, wherein: clearance mechanism (8) include two supporting shoe (81) of being connected with fixed surface on counterweight plate (4), the last fixed surface of supporting shoe (81) is connected with two gag lever post (82), two briquetting (83), two have been cup jointed jointly to the pole wall of gag lever post (82) the common fixedly connected with dog (84) in top of gag lever post (82), spring (85) have been cup jointed in the pole wall activity of gag lever post (82), the equal fixedly connected with clearance sponge piece (86) in one side that supporting shoe (81) and briquetting (83) are relative.
4. A torsion test apparatus for optical cable according to claim 1, wherein: antiskid (9) include two L shaped plate (91) with counterweight plate (4) lower surface fixed connection, two the common sliding connection in one side that L shaped plate (91) is relative has non slipping spur (92), the threaded hole is seted up to the lateral wall of L shaped plate (91), and the pore wall threaded connection of threaded hole has fixing bolt (93), the lateral wall of non slipping spur (92) is seted up and is connected logical groove (94) with L shaped plate (91) lateral wall matched with.
5. A torsion test apparatus for optical cable according to claim 3, wherein: the upper surfaces of the two pressing blocks (83) are fixedly connected with a U-shaped pull rod (18) together.
6. A torsion test apparatus for optical cable according to claim 4, wherein: the lower surfaces of the supporting legs (2) are fixedly connected with universal wheels (19), and the lower surfaces of the universal wheels (19) and the lower surfaces of the anti-skid blocks (92) are located on the same horizontal plane.
7. A torsion test apparatus for optical cable according to claim 1, wherein: two the outer wall of connector (17) is two fixed ropes (20) of equal fixedly connected with.
8. A torsion test apparatus for optical cable according to claim 1, wherein: wherein the outer walls of the two supporting legs (2) are fixedly connected with a U-shaped push rod (21) together.
9. A torsion test apparatus for optical cable according to claim 1, wherein: the lower surface slope fixedly connected with stiffener (22) of optical cable test equipment (16), the bottom of stiffener (22) and the outer wall fixed connection of supporting leg (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110576202.0A CN113405923B (en) | 2021-05-26 | 2021-05-26 | Torsion test device for optical cable |
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| CN202110576202.0A CN113405923B (en) | 2021-05-26 | 2021-05-26 | Torsion test device for optical cable |
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| CN113405923B CN113405923B (en) | 2022-12-09 |
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| CN116973086A (en) * | 2023-06-30 | 2023-10-31 | 东莞凯威计量技术有限公司 | Durability test device for digital power meter |
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| CN115014727A (en) * | 2022-07-20 | 2022-09-06 | 江苏亨通海洋光网系统有限公司 | Submarine optical cable torsional rigidity test device |
| CN115014727B (en) * | 2022-07-20 | 2023-12-15 | 江苏亨通海洋光网系统有限公司 | Submarine optical cable torsional rigidity test device |
| CN116973086A (en) * | 2023-06-30 | 2023-10-31 | 东莞凯威计量技术有限公司 | Durability test device for digital power meter |
| CN116973086B (en) * | 2023-06-30 | 2024-04-16 | 东莞凯威计量技术有限公司 | Durability test device for digital power meter |
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|---|---|
| CN113405923B (en) | 2022-12-09 |
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