CN219929327U - Stress sensor of elevator wire rope - Google Patents
Stress sensor of elevator wire rope Download PDFInfo
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- CN219929327U CN219929327U CN202321331616.8U CN202321331616U CN219929327U CN 219929327 U CN219929327 U CN 219929327U CN 202321331616 U CN202321331616 U CN 202321331616U CN 219929327 U CN219929327 U CN 219929327U
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- 230000006698 induction Effects 0.000 claims abstract description 61
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 230000005291 magnetic effect Effects 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 230000005284 excitation Effects 0.000 claims description 20
- 238000009434 installation Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 11
- 230000005415 magnetization Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The utility model discloses a stress sensor of an elevator steel wire rope, which comprises: a base; the coil bearing part is arranged on the base, a through hole is formed in the coil bearing part, and the elevator steel wire rope can be movably arranged in the through hole in a penetrating manner along the axial direction of the through hole; an exciting coil arranged on the coil bearing part and spaced from the elevator wire rope by a first preset distance in the direction perpendicular to the axis, wherein the exciting coil receives exciting current to generate an exciting magnetic field; the induction coil is arranged on the coil bearing part, is perpendicular to the axis direction and is spaced from the elevator steel wire rope by a second preset distance, and outputs an induced electromotive force signal. The stress sensor provided by the embodiment of the utility model can improve the accuracy of monitoring the stress of the elevator steel wire rope.
Description
Technical Field
The utility model relates to the technical field of electromagnetism, in particular to a stress sensor of an elevator steel wire rope.
Background
The steel wire rope (also called steel cable and steel strand) is used as a flexible bearing member, has the characteristics of good tensile property, high fatigue resistance, strong shock resistance and the like, and is a main stress and force transmission component of equipment such as an elevator, a hoisting apparatus and the like. The elevator steel wire rope is uneven in stress or invalid due to various factors such as corrosion, overload, torsion, fatigue and defects, so that safety accidents such as sliding, unexpected movement of a car, top rushing, squatting and the like of the elevator are easy to occur, and huge threat is caused to the life safety of passengers. The stress state of the elevator steel wire rope plays a vital role in the evaluation of the safety and health state of the elevator. Therefore, monitoring the stress of the elevator wire rope is of great importance to ensure safe operation of the elevator.
The existing elevator steel wire rope stress measurement method mainly comprises a pressure sensor method, a strain monitoring method, a vibration frequency method and the like. The pressure sensor method has high short-term precision, but the sensor is stressed for a long time, so that data distortion or failure is easy to occur due to material creep; strain detection can only monitor stress variation values, cannot monitor absolute values, is easily affected by temperature, boundary conditions and the like, and is difficult to obtain real stress; the vibration frequency method is affected by boundary conditions, bending rigidity, vibration damping devices and the like, has low precision and is only suitable for long steel wire ropes.
How to provide a stress sensor of elevator wire rope to improve elevator wire rope stress measurement's precision, and then can carry out real-time accurate monitoring to elevator wire rope stress and change condition in the operation process, in time get rid of elevator potential safety hazard, ensure that the safe operation of elevator is the technical problem that needs to solve at present.
Disclosure of Invention
The embodiment of the utility model aims to provide a stress sensor of an elevator steel wire rope, which is used for solving the problem of low stress measurement precision of the existing elevator steel wire rope.
In order to solve the technical problems, the present specification is implemented as follows:
in a first aspect, there is provided a stress sensor for an elevator wire rope, comprising:
a base;
the coil bearing part is arranged on the base, a through hole is formed in the coil bearing part, and the elevator steel wire rope can be movably arranged in the through hole in a penetrating manner along the axial direction of the through hole;
an exciting coil arranged on the coil bearing part and spaced from the elevator wire rope by a first preset distance in the direction perpendicular to the axis, wherein the exciting coil receives exciting current to generate an exciting magnetic field;
the induction coil is arranged on the coil bearing part, is perpendicular to the axis direction and is spaced from the elevator steel wire rope by a second preset distance, and outputs an induced electromotive force signal.
Optionally, the coil bearing part is an integrated sleeve structure, the sleeve structure forms the through hole, and the elevator wire rope is movably arranged in the through hole of the sleeve structure in a penetrating manner along the axial direction.
Optionally, the exciting coil and the induction coil are respectively wound on the inner side surface of the sleeve structure, which is correspondingly formed with the through hole, and are spaced by a third predetermined distance along the axis direction.
Optionally, the exciting coil and the induction coil are overlapped and wound on the inner side of the sleeve structure corresponding to the through hole.
Optionally, the excitation coil is wound on the inner side surface of the sleeve structure, which is correspondingly formed with the through hole, and the induction coil is overlapped on the excitation coil; or alternatively
The induction coil is wound on the inner side surface of the sleeve structure, which is correspondingly formed with the through hole, and the exciting coil is overlapped on the induction coil.
Optionally, the coil bearing part is a split structure and comprises a first coil bearing part and a second coil bearing part which are opposite, the first coil bearing part is fixed on the base, the second coil bearing part is detachably mounted on the first coil bearing part, the first coil bearing part and the second coil bearing part form the through hole, and the elevator wire rope movably penetrates through the through hole of the split structure along the axis direction.
Optionally, the exciting coil is disposed on an inner side surface of the first coil bearing portion corresponding to the through hole, and the induction coil is disposed on an inner side surface of the second coil bearing portion corresponding to the through hole; or alternatively
The exciting coil is arranged on the inner side surface of the second coil bearing part, which is correspondingly formed with the through hole, and the induction coil is arranged on the inner side surface of the first coil bearing part, which is correspondingly formed with the through hole.
Optionally, the base is fixed at the installation position of the elevator traction sheave, and the elevator wire rope is wound on the elevator traction sheave.
Optionally, the first predetermined distance is 2-5 mm, and the second predetermined distance is 2-5 mm.
Optionally, the elevator comprises a plurality of coil bearing parts which are respectively arranged on the base, and each coil bearing part is used for penetrating one elevator steel wire rope.
In the embodiment of the utility model, the stress sensor of the elevator steel wire rope comprises a base, a coil bearing part, an exciting coil and an induction coil, wherein the exciting coil and the induction coil are respectively spaced from the elevator steel wire rope by a preset distance, so that the non-contact stress measurement of the elevator steel wire rope is realized, and under the condition that the elevator steel wire rope reaches saturation magnetization due to uniform exciting magnetic field, the influence of magnetic field attenuation caused by an air gap or interval between the elevator steel wire rope and the induction coil can be eliminated, and the precision of the stress measurement is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
fig. 1 is a schematic structural view of a stress sensor of an elevator wire rope according to an embodiment of the present utility model.
Fig. 2 is a schematic perspective view of a stress sensor of an elevator wire rope according to a first embodiment of the present utility model.
Fig. 3 is a partial perspective structural sectional view of a stress sensor of an elevator wire rope according to a first embodiment of the present utility model.
Fig. 4 is a schematic perspective view of a stress sensor of an elevator wire rope according to a second embodiment of the present utility model.
Fig. 5 is an exploded perspective view of a stress sensor of an elevator wire rope according to a second embodiment of the present utility model.
Fig. 6 is a schematic diagram of the installation position of a stress sensor of an elevator wire rope according to an embodiment of the utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. The reference numerals in the present utility model are only used for distinguishing the steps in the scheme, and are not used for limiting the execution sequence of the steps, and the specific execution sequence controls the description in the specification.
In order to solve the problems in the prior art, an embodiment of the utility model provides a stress sensor of an elevator steel wire rope, and fig. 1 is a schematic structural diagram of the stress sensor of the elevator steel wire rope.
As shown in fig. 1, the stress sensor of the elevator wire rope includes: a base 10; a coil bearing part 20 arranged on the base 10, wherein the coil bearing part 20 forms a through hole 30, and an elevator wire rope 40 is movably penetrated in the through hole 20 along the axial direction A of the through hole 20; an exciting coil 50 provided on the coil bearing part 20 and spaced apart from the elevator wire rope 40 by a first predetermined distance H1 perpendicular to the axial direction a, the exciting coil 50 receiving an exciting current to generate an exciting magnetic field; an induction coil 60 disposed on the coil bearing part 20 and spaced apart from the elevator wire rope 40 by a second predetermined distance H2 perpendicular to the axial direction a, the induction coil 60 outputting an induced electromotive force signal.
In an embodiment of the utility model the elevator wire rope 40 is passed through the coil carrier 20 provided with an excitation coil 50 and an induction coil 60, whereby the excitation coil and the induction coil enclose the elevator wire rope 40. The exciting coil 50 is used for generating an exciting magnetic field by exciting current, and the induction coil 60 is used for generating induced electromotive force according to the elevator wire rope 40 magnetized by the exciting magnetic field.
The excitation magnetic field generated by the excitation current supplied to the excitation coil 50 is a uniform excitation magnetic field that can achieve saturation magnetization of the elevator wire rope 40. The saturation magnetization is the maximum magnetization that can be achieved when the elevator wire rope 40 is magnetized in an externally applied excitation magnetic field, and after the elevator wire rope 40 reaches the saturation magnetization, the magnetic attraction of the elevator wire rope 40 does not increase with the increase of the excitation magnetic field. A uniform excitation magnetic field refers to a magnetic field of constant magnetic field strength. The uniform excitation magnetic field is an alternating periodic excitation magnetic field, and correspondingly, the elevator wire ropes 40 can periodically reach saturation magnetization.
The elevator wire rope 40 is a ferromagnetic material having high magnetic permeability, and can be strongly magnetized to exhibit a large magnetic property after being placed in an external magnetic field of a certain strength. When the elevator wire rope 40 is subjected to a uniform magnetic field and stress, the change of elastic energy is generated inside, so that the magnetization of the elevator wire rope is reoriented, and the change of magnetic permeability is caused. The change of the magnetic permeability can generate an equivalent magnetic field, and the existence of the equivalent magnetic field can lead to the change of the magnetic induction intensity inside the elevator steel wire rope, and the change of the magnetic induction intensity can be reflected by induced electromotive force. That is, there is a correspondence between the stress to which the elevator wire rope is subjected and the induced electromotive force.
By acquiring the induced electromotive force signal output from the induction coil 60, it can be used to measure the stress to which the elevator wire rope 40 is subjected.
As shown in fig. 1, in the embodiment of the present utility model, the exciting coil 50 and the induction coil 60 are spaced apart from the elevator wire rope 40 or air gap, respectively, that is, the exciting coil 50 and the induction coil 60 are wound around the elevator wire rope 40 in a non-contact manner. The elevator wire rope 40 may pass through the corresponding turns of the exciting coil 50 and the induction coil 60 through the through-hole 30, and the stress sensor including the exciting coil 50 and the induction coil 60 does not move following up and down movement of the elevator wire rope 40 while operating, and the stress sensor measures the stress on the elevator wire rope 40 in a non-contact manner.
Optionally, the first predetermined distance is 2-5 mm, and the second predetermined distance is 2-5 mm.
Here, the first and second predetermined distances refer to the minimum distances between the excitation coil 50 and the induction coil 60, respectively, and the elevator wire rope 40 on the corresponding sides. Taking an elevator rope diameter of 8 mm as an example, the through-hole 30 has a diameter of 12-18 mm.
Under the condition that the elevator wire rope 40 reaches saturation magnetization by uniformly exciting the magnetic field, the intensity of magnetization of the elevator wire rope 40 is not changed, and when the stress of the elevator wire rope 40 can be measured in a non-contact mode by the stress sensor, the influence of magnetic field attenuation caused by an air gap or an interval between the elevator wire rope 40 and the exciting coil 50 and the induction coil 60 of the stress sensor is eliminated, so that the precision of the stress sensor on the elevator wire rope 40 is ensured.
And the stress sensor does not move along with the elevator wire rope 40, so that the movement of the elevator wire rope 40 is not interfered, the structure of the elevator wire rope 40 is not damaged, and the operation safety of the elevator is not influenced.
The structures of the pressure sensors according to the embodiments of the present utility model will be described below with reference to the different embodiments, respectively.
Referring to fig. 2, fig. 2 is a schematic perspective view of a stress sensor with an integrated structure according to an embodiment of the present utility model.
In the embodiment of fig. 2, the coil bearing portion 20 is a sleeve structure 210 integrally formed, the sleeve structure 210 forms the through hole 30, and the elevator wire rope 40 is movably disposed in the through hole 30 of the sleeve structure 210 along the axial direction.
For a newly installed elevator, a stress sensor of a sleeve structure can be selected, and the elevator wire rope 10 is directly passed through the through hole 30 of the sleeve structure 210 when the elevator wire rope 10 is installed or the elevator wire rope 10 is replaced, so that non-contact stress measurement of the stress sensor is realized.
In one example, referring to fig. 1, the exciting coil 50 and the induction coil 60 are respectively wound on the inner side surfaces of the sleeve structures 210 where the through holes 30 are correspondingly formed and spaced apart from each other by a third predetermined distance H3 in the axial direction a.
In this embodiment, the exciting coil 50 and the induction coil 60 may be wound around both ends of the inner side surface of the sleeve structure 210, respectively, and there is no contact between the exciting coil 50 and the induction coil 60.
Referring to fig. 3, fig. 3 is a perspective view of a stress sensor of an elevator wire rope of the embodiment of fig. 2, with a corresponding portion of a dotted line area C removed, in a direction of an axis line direction a, so as to clearly know a positional relationship between the exciting coil 50 and the induction coil 60, such as a spacing of the exciting coil 50 and the induction coil 60 by a third predetermined distance H3.
In one example, the exciting coil 50 and the induction coil 60 are overlapped and wound on the inner side of the sleeve structure 210 corresponding to the through hole 30.
In this embodiment, the excitation coil 50 and the induction coil 60 are arranged to overlap, i.e. in contact between the excitation coil 50 and the induction coil 60.
Specifically, the exciting coil 50 is wound on the inner side surface of the sleeve structure 210 corresponding to the through hole 30, and the induction coil 60 is stacked on the exciting coil 50. Alternatively, the induction coil 60 is wound on the inner side surface of the sleeve structure 121 corresponding to the through hole 30, and the exciting coil 50 is stacked on the induction coil 60.
In the embodiment of the present utility model, the through hole 30 is, for example, cylindrical or rectangular columnar. In the example of fig. 3, the through hole 30 is cylindrical.
Referring to fig. 4 and 5, fig. 4 is a schematic perspective view of a split-structure stress sensor according to an embodiment of the present utility model, and fig. 5 is an exploded perspective view of a stress sensor of an elevator wire rope according to a second embodiment of the present utility model.
In this embodiment, the coil bearing portion 20 is a split structure 220, and includes a first coil bearing portion 222 and a second coil bearing portion 224 opposite to each other, where the first coil bearing portion 222 is fixed on the base 10, the second coil bearing portion 224 is detachably mounted on the first coil bearing portion 222, the first coil bearing portion 222 and the second coil bearing portion 224 form the through hole 30, and the elevator wire rope 40 is movably disposed in the through hole 30 of the split structure 220 along the axis direction.
The exciting coil 50 is disposed on the inner side surface of the first coil bearing portion 222 corresponding to the through hole 30, and the induction coil 60 is disposed on the inner side surface of the second coil bearing portion 224 corresponding to the through hole 30; alternatively, the exciting coil 50 is disposed on the inner side surface of the second coil bearing portion 224 corresponding to the through hole 30, and the induction coil 60 is disposed on the inner side surface of the first coil bearing portion 222 corresponding to the through hole 30.
In the example of fig. 4 and 5, the exciting coil 50 is disposed on the inner side surface of the second coil bearing portion 224 corresponding to the through hole 30, and the induction coil 60 is disposed on the inner side surface of the first coil bearing portion 222 corresponding to the through hole 30.
In the example of fig. 4 and 5, the through hole 30 is rectangular columnar. The exciting coil 50 is disposed on three sides of the first coil bearing portion 222, the second coil bearing portion 224 may have a symmetrical structure with the first coil bearing portion 222, and the induction coil 60 is disposed on three sides of the second coil bearing portion 224. Alternatively, the second coil supporting part 224 may have a planar structure, and the induction coil 60 is wound around a side of the second coil supporting part 224 corresponding to the plane, for example, four sides of fig. 5.
The exciting coil 50 may be disposed on 8 sides corresponding to three sides of the first coil bearing part 222, and the induction coil 60 may be disposed on 8 sides corresponding to three sides of the second coil bearing part 224. When the elevator wire rope 40 is inserted into the through hole 30, the elevator wire rope is surrounded by the exciting coil 50 and the induction coil 60, and the stress sensor can realize non-contact elevator wire rope stress measurement.
Of course, in another embodiment, the positions of the excitation coil 50 and the induction coil 60 may be interchanged, as well as a stress sensor that can measure the stress of the elevator rope without contact.
For an in-service elevator, a stress sensor with a split structure can be selected for installation, the excitation coil 50 and the induction coil 60 are mutually separated by the stress sensor with the split structure, the elevator wire rope 40 can be directly placed in the middle of the stress sensor during installation, and the first coil bearing part 222 and the second coil bearing part 224 are combined and installed to form the through hole 30, so that the stress sensor for measuring the stress of the elevator wire rope 40 in a non-contact mode is obtained.
Alternatively, the base 10 is fixed at the installation position of the elevator traction sheave 70, and the elevator wire rope 40 is wound around the elevator traction sheave 70.
With reference to fig. 6, fig. 6 is a schematic diagram of an installation position of a stress sensor 100 of an elevator wire rope according to an embodiment of the present utility model.
As shown in fig. 6, since the exciting coil 50, the induction coil 60 and the elevator wire rope 40 of the stress sensor 100 are spaced apart by a predetermined distance, that is, the stress sensor 100 is of a non-contact design, by fixing the base 10 at the installation position of the elevator traction sheave 70, for example, at the installation frame position of the traction sheave 70, and passing the elevator wire rope through the through-hole 30 of the coil bearing part 20.
In this way, the stress sensor 100 can be installed at a fixed position, so that the elevator operation is not affected, and the stress measurement effect can be ensured.
In one embodiment, the stress sensor 100 for an elevator wire rope includes a plurality of coil bearing parts 20 respectively disposed on the base 10, and each coil bearing part 20 is used for threading one elevator wire rope 40.
As shown in fig. 6, the stress sensor 100 includes 3 coil carriers 20, each of which has an exciting coil 50 and an induction coil 60 disposed therein, respectively, and is spaced apart from the elevator wire rope 40 by a predetermined distance. Thus, the final stress measurement result of the elevator wire rope 40 can be obtained by comprehensively analyzing the induced electromotive force output from each induction coil 60, thereby further improving the stress measurement accuracy of the elevator wire rope 40.
In the embodiment of the utility model, the stress sensor of the elevator steel wire rope comprises a base, a coil bearing part, an exciting coil and an induction coil, wherein the exciting coil and the induction coil are respectively spaced from the elevator steel wire rope by a preset distance, so that the non-contact stress measurement of the elevator steel wire rope is realized, and under the condition that the elevator steel wire rope reaches saturation magnetization due to uniform exciting magnetic field, the influence of magnetic field attenuation caused by an air gap or interval between the elevator steel wire rope and the induction coil can be eliminated, and the precision of the stress measurement is ensured.
In addition, the exciting coil and the induction coil do not move along with the elevator wire rope, so that the movement of the elevator wire rope is not interfered, the structure of the elevator wire rope is not damaged, and the operation safety of the elevator is not influenced.
The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are to be protected by the present utility model.
Claims (10)
1. A stress sensor for an elevator wire rope, comprising:
a base;
the coil bearing part is arranged on the base, a through hole is formed in the coil bearing part, and the elevator steel wire rope can be movably arranged in the through hole in a penetrating manner along the axial direction of the through hole;
an exciting coil arranged on the coil bearing part and spaced from the elevator wire rope by a first preset distance in the direction perpendicular to the axis, wherein the exciting coil receives exciting current to generate an exciting magnetic field;
the induction coil is arranged on the coil bearing part, is perpendicular to the axis direction and is spaced from the elevator steel wire rope by a second preset distance, and outputs an induced electromotive force signal.
2. The stress sensor according to claim 1, wherein the coil bearing portion is a sleeve structure integrated with the through hole, the sleeve structure forming the through hole, the elevator wire rope being movably penetrating the through hole of the sleeve structure in the axial direction.
3. The stress sensor according to claim 2, wherein the excitation coil and the induction coil are respectively wound on inner sides of the sleeve structure where the through holes are correspondingly formed and spaced apart from each other by a third predetermined distance in the axial direction.
4. The stress sensor of claim 2, wherein the excitation coil and the induction coil are overlapped and wound on the inner side of the sleeve structure corresponding to the through hole.
5. The stress sensor of claim 4, wherein,
the exciting coil is wound on the inner side surface of the sleeve structure, which is correspondingly formed with the through hole, and the induction coil is overlapped on the exciting coil; or alternatively
The induction coil is wound on the inner side surface of the sleeve structure, which is correspondingly formed with the through hole, and the exciting coil is overlapped on the induction coil.
6. The stress sensor of claim 1, wherein the coil bearing portion is of a split structure and comprises a first coil bearing portion and a second coil bearing portion which are opposite to each other, the first coil bearing portion is fixed on the base, the second coil bearing portion is detachably mounted on the first coil bearing portion, the first coil bearing portion and the second coil bearing portion form the through hole, and the elevator wire rope is movably arranged in the through hole of the split structure in a penetrating manner along the axis direction.
7. The stress sensor of claim 6, wherein,
the exciting coil is arranged on the inner side surface of the first coil bearing part, which correspondingly forms the through hole, and the induction coil is arranged on the inner side surface of the second coil bearing part, which correspondingly forms the through hole; or alternatively
The exciting coil is arranged on the inner side surface of the second coil bearing part, which is correspondingly formed with the through hole, and the induction coil is arranged on the inner side surface of the first coil bearing part, which is correspondingly formed with the through hole.
8. The stress sensor according to any one of claims 1 to 7, characterized in that the base is fixed at the installation position of an elevator traction sheave, on which the elevator wire rope is wound.
9. The stress sensor of any of claims 1 to 7, wherein the first predetermined distance is 2-5 millimeters and the second predetermined distance is 2-5 millimeters.
10. The stress sensor according to any one of claims 1 to 7, comprising a plurality of the coil carrying portions, each for threading one elevator wire rope, respectively, provided on the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321331616.8U CN219929327U (en) | 2023-05-29 | 2023-05-29 | Stress sensor of elevator wire rope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321331616.8U CN219929327U (en) | 2023-05-29 | 2023-05-29 | Stress sensor of elevator wire rope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219929327U true CN219929327U (en) | 2023-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321331616.8U Active CN219929327U (en) | 2023-05-29 | 2023-05-29 | Stress sensor of elevator wire rope |
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| Country | Link |
|---|---|
| CN (1) | CN219929327U (en) |
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2023
- 2023-05-29 CN CN202321331616.8U patent/CN219929327U/en active Active
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