CN114382401B - Water supply security protection cat ladder device based on visual identification system - Google Patents
Water supply security protection cat ladder device based on visual identification system Download PDFInfo
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- CN114382401B CN114382401B CN202210051202.3A CN202210051202A CN114382401B CN 114382401 B CN114382401 B CN 114382401B CN 202210051202 A CN202210051202 A CN 202210051202A CN 114382401 B CN114382401 B CN 114382401B
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- Prior art keywords
- ladder
- image information
- water supply
- control system
- electromagnetic actuator
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 241000282326 Felis catus Species 0.000 title claims abstract description 69
- 230000000007 visual effect Effects 0.000 title claims abstract description 30
- 230000010365 information processing Effects 0.000 claims abstract description 12
- 230000009193 crawling Effects 0.000 claims description 33
- 238000012544 monitoring process Methods 0.000 claims description 15
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000009194 climbing Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/02—Extending means
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/383—Foldable ladders in which the longitudinal members are brought together on folding
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/08—Special construction of longitudinal members, or rungs or other treads
- E06C7/082—Connections between rungs or treads and longitudinal members
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
The invention discloses a water supply security ladder device based on a visual identification system, which comprises a ladder assembly, wherein the ladder assembly is provided with an inner ladder and an outer ladder, a slide way is fixedly arranged on the inner ladder, the upper end of the outer ladder is connected with the upper end of the inner ladder through the slide way, electromagnetic actuators are arranged on the inner side of the upper end of the outer ladder and the inner side of the upper end of the inner ladder, the electromagnetic actuators can drive the outer ladder to slide along the slide way on the inner ladder to slide outwards to open the ladder assembly, and the electromagnetic actuators can reversely drive the outer ladder to slide along the slide way on the inner ladder to slide inwards to close the ladder assembly through closing of the electromagnetic actuators. The invention can instruct the electromagnetic actuator to open or close through the visual identification information processing system component, so that the cat ladder component can be opened or closed, thereby realizing the maintenance of the water tank, or avoiding the threat of irrelevant personnel to the safety of the water body in the water tank, and being suitable for popularization and use as a security cat ladder device matched with water supply equipment.
Description
Technical Field
The invention relates to the technical field of water supply security ladder stand devices based on visual identification systems, in particular to a water supply security ladder stand device based on a visual identification system.
Background
The water tank is a common matching device in water supply equipment of a living pump room. A large amount of domestic drinking water is stored in the water tank of the water supply device, and the height is usually more than two meters. The water tank outside of water supply equipment can be equipped with cat ladder device generally, and ordinary cat ladder device exists when using: on one hand, lawbreakers can climb into the water tank through the ladder climbing device without barriers, and the safety of drinking water of water bodies in the water tank is threatened; on the other hand, the non-high altitude staff can threaten the personal safety of the non-high altitude staff when arriving at the top of the water tank through the ladder stand.
Disclosure of Invention
The invention aims to solve the problems existing in the use of a common ladder stand device for a water tank of water supply equipment. According to the invention, the electromagnetic actuator can be instructed to be opened or closed through the visual identification information processing system component, so that the cat ladder component can be opened or closed, when the cat ladder is opened, a high-altitude staff can climb the water tank of the water supply equipment through the cat ladder, overhaul and maintenance on the water tank are realized, when the cat ladder is closed, irrelevant staff and non-high-altitude staff can be prevented from climbing the water tank of the water supply equipment through the cat ladder, the threat to the water body safety in the water tank is avoided, the threat to the personal safety of the non-high-altitude staff is prevented, and the cat ladder is suitable for being popularized and used as a security cat ladder device matched with the water supply equipment.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
water supply security protection cat ladder device based on visual identification system, including cat ladder subassembly, cat ladder subassembly has interior cat ladder and outer cat ladder, still includes:
The inner ladder is fixedly provided with a slide way, the upper end of the outer ladder is connected with the upper end of the inner ladder through the slide way, the inner side of the upper end of the outer ladder and the inner side of the upper end of the inner ladder are both provided with electromagnetic actuators, the electromagnetic actuators can drive the outer ladder to slide outwards along the slide way on the inner ladder through opening the electromagnetic actuators, the ladder assembly can be opened in an outward sliding manner, and the electromagnetic actuators can reversely drive the outer ladder to slide inwards along the slide way on the inner ladder through closing the electromagnetic actuators, so that the ladder assembly can be closed in an inward sliding manner;
The electromagnetic actuator can be connected with the visual identification information processing system component through the wire harness, the visual identification information processing system component can acquire image information on the cat ladder component, and can carry out identification judgment on the image information, the electromagnetic actuator is determined to be instructed to be opened or closed so as to enable the cat ladder component to be opened or closed, the cat ladder component can be connected with the water supply equipment water tank, workers can conveniently overhaul, maintain and climb the water supply equipment water tank, and threat to water body safety in the water supply equipment water tank by irrelevant people can be avoided.
In order to enable the stability of the linkage of the outer crawling ladder and the inner crawling ladder to be good, the overall stability and the firmness of a climbing crawling ladder assembly of a worker are improved, further, the inner side of the outer crawling ladder and the inner side of the inner crawling ladder are provided with pedal plates, the side faces of the pedal plates are linked with the outer crawling ladder, meanwhile, the side faces of the pedal plates are linked with the inner crawling ladder, the pedal plates can rotate along the linkage parts of the outer crawling ladder and the inner crawling ladder, the linkage parts of the pedal plates and the linkage parts enable the linkage stability of the outer crawling ladder and the inner crawling ladder to be good, and the stability and the firmness of climbing of the worker are improved.
In order to close when the cat ladder subassembly, make irrelevant personnel and non-high altitude staff can't upwards climb through pedal piece, outer cat ladder and interior cat ladder, further, electromagnetic actuator closes, and electromagnetic actuator reverse drives outer cat ladder and inwards slides along interior cat ladder upper slide and close the cat ladder subassembly, pedal piece can rotate along outer cat ladder linking department and interior cat ladder linking department, makes outer cat ladder inwards cat ladder draw together, pedal piece oblique side erects between outer cat ladder linking department and interior cat ladder linking department, forms the vertical wall bodily form between pedal piece and outer cat ladder, the interior cat ladder three, makes irrelevant personnel can't upwards climb through pedal piece, outer cat ladder and interior cat ladder.
In order to realize the collection of the image information on the crawling ladder assembly and the identification and judgment processing of the image information, the image information on the crawling ladder assembly can be ensured to be identified, judged, stable and consistent, and clear and high in accuracy, the visual identification information processing system assembly is further provided with a monitoring camera and a control cabinet connected with the monitoring camera through a wire harness, a PLC storage control system part is arranged in the control cabinet, the monitoring camera can be connected with the PLC storage control system part through the wire harness, the monitoring camera can acquire the image information on the crawling ladder assembly and transmit relevant image information to the PLC storage control system part, and the electromagnetic actuator is connected with the PLC storage control system part through the wire harness;
the PLC storage control system component can be connected with a remote monitoring center display screen through a wire harness or a wireless local area network, the remote monitoring center display screen is connected with a corresponding management and control system, the PLC storage control system component can transmit related image information to the remote monitoring center display screen, acquire information for identifying and judging the image information through the corresponding management and control system, transmit the information for identifying and judging the image information to an electromagnetic actuator,
And then instruct electromagnetic actuator to open or close to make cat ladder subassembly open or close, ensure to be able to discern the stable uniformity of judging to the image information on the cat ladder subassembly, clear degree of accuracy is high.
Compared with the prior art, the invention provides the water supply security ladder stand device based on the visual identification system, which has the following beneficial effects:
1. The water supply security ladder device based on the visual recognition system instructs the electromagnetic actuator to open or close through the visual recognition information processing system, the electromagnetic actuator on the inner side of the outer ladder is connected with the upper end part of the inner ladder through the telescopic link condition, the electromagnetic actuator on the inner side of the inner ladder is connected with the upper end part of the outer ladder through different telescopic link conditions, the electromagnetic actuator on the inner side of the inner ladder can drive the outer ladder to slide outwards along a slideway on the inner ladder through the telescopic link condition to open a ladder assembly, and when the ladder assembly is opened, a high-altitude staff can climb a water tank of water supply equipment through the ladder to overhaul and maintain the water tank; by closing the electromagnetic actuator, the electromagnetic actuator on the inner side of the outer ladder can reversely drive the outer ladder to close the ladder assembly in an inward sliding manner along the slide way on the inner ladder through the corresponding telescopic chain condition, so that irrelevant personnel and non-high-altitude staff are prevented from climbing the water tank of the water supply equipment through the ladder, threat to the water body safety in the water tank is avoided, and threat to the personal safety of the non-high-altitude staff is prevented;
2. this water supply security protection cat ladder device based on visual identification system, inboard and the interior cat ladder inboard are provided with pedal piece through outer cat ladder, pedal piece can be followed outer cat ladder and link the department and rotate with interior cat ladder, when the cat ladder subassembly is opened, high altitude construction personnel can pass through the inboard pedal piece of cat ladder, more conveniently climb water tank of water supply equipment, when the cat ladder subassembly is closed, pedal piece and can form the vertical wall bodily form between outer cat ladder, the interior cat ladder three, make irrelevant personnel and non-high altitude staff can't upwards climb through pedal piece, outer cat ladder and interior cat ladder.
Drawings
Fig. 1 is a front schematic view of a water supply security ladder stand device based on a visual recognition system, wherein when a ladder stand assembly is opened, the overall water supply security ladder stand device is provided with a plurality of visual recognition systems;
Fig. 2 is a schematic side view of a water supply security ladder stand device based on a visual recognition system, wherein when a ladder stand assembly is opened, the whole water supply security ladder stand device is shown in side view;
FIG. 3 is a schematic front view of the water supply security ladder stand device based on the visual recognition system, when the ladder stand assembly is closed;
Fig. 4 is a schematic side view of a water supply security ladder stand device based on a visual recognition system, wherein the overall water supply security ladder stand device is shown when a ladder stand assembly is closed;
FIG. 5 is a schematic diagram of a visual recognition information handling system component frame connection in accordance with the present invention;
FIG. 6 is a schematic diagram of the program logic relationship of the control system within the PLC storage control system of the present invention.
In the figure: 1. an inner ladder stand; 2. an outer ladder stand; 3. a pedal member; 4. a slideway; 5. an electromagnetic actuator; 6. a telescopic chain condition.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The present invention will be described in further detail with reference to examples and embodiments.
Referring to fig. 1 to 6: the utility model provides a water supply security protection cat ladder device based on visual identification system, includes the cat ladder subassembly, and the cat ladder subassembly has interior cat ladder 1 and outer cat ladder 2, still includes:
The inner ladder 1 is fixedly provided with a slide way 4, the upper end of the outer ladder 2 and the upper end of the inner ladder 1 are connected through the slide way 4, the inner side of the upper end of the outer ladder 2 and the inner side of the upper end of the inner ladder 1 are both provided with electromagnetic actuators 5, meanwhile, the electromagnetic actuators 5 on the inner side of the outer ladder 2 are connected with the upper end of the inner ladder 1 through telescopic chain conditions 6, the electromagnetic actuators 5 on the inner side of the inner ladder 1 are connected with the upper end of the outer ladder 2 through different telescopic chain conditions 6, the electromagnetic actuators 5 on the outer ladder 2 can drive the outer ladder 2 to slide along the slide way 4 on the inner ladder 1, the ladder assembly is opened by sliding outwards, and the electromagnetic actuators 5 on the inner ladder 1 can reversely drive the outer ladder 2 to slide along the slide way on the inner ladder 1 by closing the electromagnetic actuators 5, and the ladder assembly is closed by sliding inwards;
The electromagnetic actuator 5 can be connected with a visual identification information processing system component through a wire harness, the visual identification information processing system component can acquire image information on the cat ladder component, can identify and judge the image information, determines to instruct the electromagnetic actuator 5 to open or close so as to open or close the cat ladder component, and can be connected with a water tank of water supply equipment, so that staff can conveniently overhaul, maintain and climb the water tank of the water supply equipment, and the threat of irrelevant staff on the safety of water bodies in the water tank of the water supply equipment can be avoided;
In order to ensure that the stability of the linkage of the outer crawling ladder 2 and the inner crawling ladder 1 is good and improve the overall stability and the firmness of the climbing crawling ladder assembly of staff, the following explanation is needed: the pedal piece 3 is arranged on the inner side of the outer crawling ladder 2 and the inner side of the inner crawling ladder 1, the side face of the pedal piece 3 is connected with the outer crawling ladder 2, meanwhile, the side face of the pedal piece 3 is connected with the inner crawling ladder 1, the pedal piece 3 can rotate along the joint of the outer crawling ladder 2 and the joint of the inner crawling ladder 1, the pedal piece 3 and the joint enable the outer crawling ladder 2 and the inner crawling ladder 1 to be good in stability, and the climbing stability and firmness of workers are improved;
in order to enable unrelated personnel and non-high altitude staff to climb upwards through the pedal 3, the outer ladder 2 and the inner ladder 1 when the ladder assembly is closed, explanation is needed: the electromagnetic actuator 5 is closed, the electromagnetic actuator 5 reversely drives the outer ladder 2 to inwards slide along the upper slideway 4 of the inner ladder 1 to close the ladder assembly, the pedal piece 3 can rotate along the joint of the outer ladder 2 and the joint of the inner ladder 1, so that the outer ladder 2 is gathered up to the inner ladder 1, the inclined side of the pedal piece 3 is erected between the joint of the outer ladder 2 and the joint of the inner ladder 1, and a vertical wall is formed between the pedal piece 3 and the outer ladder 2 and between the pedal piece 3 and the inner ladder 1, so that irrelevant personnel cannot climb upwards through the pedal piece 3, the outer ladder 2 and the inner ladder 1;
In order to realize the collection of the image information on the cat ladder assembly and the identification judgment processing of the image information, the image information on the cat ladder assembly can be ensured to be identified, judged, stabilized and consistent, clear and high in accuracy, and needs to be explained: the visual identification information processing system component is provided with a monitoring camera and a control cabinet connected with the monitoring camera through a wire harness, a PLC storage control system component is arranged in the control cabinet, the monitoring camera can be connected with the PLC storage control system component through the wire harness, the monitoring camera can acquire image information on the cat ladder component and transmit relevant image information to the PLC storage control system component, and the electromagnetic actuator 5 is connected with the PLC storage control system component through the wire harness;
The PLC storage control system component can be connected with a remote monitoring center display screen through a wire harness or a wireless local area network, the remote monitoring center display screen is connected with a corresponding management and control system, the PLC storage control system component can transmit related image information to the remote monitoring center display screen, acquire information for identifying and judging the image information through the corresponding management and control system, transmit the information for identifying and judging the image information to the electromagnetic actuator 5,
And then instruct electromagnetic actuator 5 to open or close to make cat ladder subassembly open or close, ensure that can be to the image information discernment on the cat ladder subassembly judge stable uniformity good, clear degree of accuracy is high.
The application method of the device comprises the following steps:
Step one: inputting acquired image information into a PLC storage control system part through a monitoring camera of visual identification equipment, transmitting the acquired image information to a remote monitoring center display screen in a management center by the PLC storage control system part, and simultaneously carrying out image analysis and identification on the input acquired image information by a control system program in the PLC storage control system part;
step two: the PLC storage control system part connected with the remote monitoring center display screen in the management center analyzes and identifies the image information, when the image information does not meet the requirements, the electromagnetic actuator 5 is closed to prohibit starting, and the monitoring camera is used for acquiring and collecting the image information again, and when the image information meets the requirements;
Step three: the electromagnetic actuator 5 is opened, the electromagnetic actuator 5 on the outer ladder 2 can drive the outer ladder 2 to slide outwards along the slide way 4 on the inner ladder 1 through the opening of the electromagnetic actuator 5, a high-altitude staff can overhaul and maintain the water tank of the water supply equipment through the opened ladder assembly, so that climbing is convenient;
Step four: after the high-altitude staff uses to close, the monitoring camera transmits acquired image information to the PLC storage control system part, the PLC storage control system part instructs the electromagnetic actuator 5 to close, the electromagnetic actuator 5 on the inner ladder 1 can reversely drive the outer ladder 2 to close the ladder assembly in an inward sliding manner along the slide way on the inner ladder 1, and irrelevant staff cannot climb upwards through the pedal 3 and the ladder assembly comprising the outer ladder 2 and the inner ladder 1, and meanwhile the electromagnetic actuator 5 is automatically locked.
The present invention is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed within the scope of the present invention.
Claims (1)
1. A water supply security protection cat ladder device based on visual recognition system includes cat ladder subassembly, and cat ladder subassembly has interior cat ladder and
Outer cat ladder, its characterized in that still includes:
The inner ladder is fixedly provided with a slide way, the upper end of the outer ladder is connected with the upper end of the inner ladder through the slide way, the inner side of the upper end of the outer ladder and the inner side of the upper end of the inner ladder are both provided with electromagnetic actuators, the electromagnetic actuators can drive the outer ladder to slide outwards along the slide way on the inner ladder through opening the electromagnetic actuators, the ladder assembly can be opened in an outward sliding manner, and the electromagnetic actuators can reversely drive the outer ladder to slide inwards along the slide way on the inner ladder through closing the electromagnetic actuators, so that the ladder assembly can be closed in an inward sliding manner;
The electromagnetic actuator can be connected with the visual identification information processing system component through the wire harness, the visual identification information processing system component can acquire image information on the ladder stand component, can identify and judge the image information, and determines to instruct the electromagnetic actuator to open or close so as to enable the ladder stand component to open or close, the ladder stand component can be connected with the water tank of the water supply device, so that staff can conveniently overhaul, maintain and climb the water tank of the water supply device, and the threat of irrelevant staff on the safety of water bodies in the water tank of the water supply device can be avoided;
The pedal plate is arranged on the inner side of the outer crawling ladder and the inner side of the inner crawling ladder, the side face of the pedal plate is connected with the outer crawling ladder, meanwhile, the side face of the pedal plate is connected with the inner crawling ladder, the pedal plate can rotate along the joint of the outer crawling ladder and the joint of the inner crawling ladder, and the pedal plate and the joint enable the outer crawling ladder and the inner crawling ladder to be good in stability;
The visual identification information processing system component is provided with a monitoring camera and a control cabinet connected with the monitoring camera through a wire harness, a PLC storage control system component is arranged in the control cabinet, the monitoring camera can be connected with the PLC storage control system component through the wire harness, the monitoring camera can acquire image information on the cat ladder component and transmit relevant image information to the PLC storage control system component, and the electromagnetic actuator is connected with the PLC storage control system component through the wire harness;
The PLC storage control system component can be connected with a remote monitoring center display screen through a wire harness or a wireless local area network, the remote monitoring center display screen is connected with a corresponding management and control system, the PLC storage control system component can transmit related image information to the remote monitoring center display screen, acquire information for identifying and judging the image information through the corresponding management and control system, transmit the information for identifying and judging the image information to an electromagnetic actuator,
Further instructs the electromagnetic actuator to open or close so as to open or close the ladder assembly, ensure that the image information on the ladder assembly can be identified, judged, stabilized and consistent, clear and accurate,
The electromagnetic actuator is closed, the electromagnetic actuator reversely drives the outer ladder to inwards slide along the upper slideway of the inner ladder to close the ladder assembly, the pedal plate can rotate along the joint of the outer ladder and the joint of the inner ladder, the outer ladder is folded inwards, the inclined side of the pedal plate is erected between the joint of the outer ladder and the joint of the inner ladder, and an upright wall is formed between the pedal plate and the outer ladder and between the pedal plate and the inner ladder, so that irrelevant personnel cannot upwards climb through the pedal plate, the outer ladder and the inner ladder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210051202.3A CN114382401B (en) | 2022-01-17 | 2022-01-17 | Water supply security protection cat ladder device based on visual identification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210051202.3A CN114382401B (en) | 2022-01-17 | 2022-01-17 | Water supply security protection cat ladder device based on visual identification system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114382401A CN114382401A (en) | 2022-04-22 |
| CN114382401B true CN114382401B (en) | 2024-07-02 |
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ID=81202017
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210051202.3A Active CN114382401B (en) | 2022-01-17 | 2022-01-17 | Water supply security protection cat ladder device based on visual identification system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101681032B1 (en) * | 2015-12-24 | 2016-12-13 | 이에스테크 주식회사 | Refuge management system using the refuge ladder |
| CN110578463A (en) * | 2019-09-29 | 2019-12-17 | 徐工集团工程机械股份有限公司科技分公司 | foldable engineering machinery ladder stand |
| CN217380386U (en) * | 2022-01-17 | 2022-09-06 | 安徽舜禹水务股份有限公司 | Water supply security protection cat ladder device based on visual identification system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB216039A (en) * | 1923-10-06 | 1924-05-22 | Alfred Benjamin Davis | Improvements in ladders |
| US1887301A (en) * | 1931-03-25 | 1932-11-08 | Mack Atkins | Berth ladder for sleeping cars |
| US6401861B1 (en) * | 2000-07-06 | 2002-06-11 | Great Lakes Construction Services | Adjustable floating ladder for loading a dumpster |
| CN210083074U (en) * | 2019-04-15 | 2020-02-18 | 南京海格专用车技术有限公司 | Outside hidden folding stair for car as a house |
-
2022
- 2022-01-17 CN CN202210051202.3A patent/CN114382401B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101681032B1 (en) * | 2015-12-24 | 2016-12-13 | 이에스테크 주식회사 | Refuge management system using the refuge ladder |
| CN110578463A (en) * | 2019-09-29 | 2019-12-17 | 徐工集团工程机械股份有限公司科技分公司 | foldable engineering machinery ladder stand |
| CN217380386U (en) * | 2022-01-17 | 2022-09-06 | 安徽舜禹水务股份有限公司 | Water supply security protection cat ladder device based on visual identification system |
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| Publication number | Publication date |
|---|---|
| CN114382401A (en) | 2022-04-22 |
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