CN108016965A - A kind of elevator safety monitoring system and elevator - Google Patents
A kind of elevator safety monitoring system and elevator Download PDFInfo
- Publication number
- CN108016965A CN108016965A CN201711466114.5A CN201711466114A CN108016965A CN 108016965 A CN108016965 A CN 108016965A CN 201711466114 A CN201711466114 A CN 201711466114A CN 108016965 A CN108016965 A CN 108016965A
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- Prior art keywords
- elevator
- steel cable
- unit
- alarm
- hall door
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
- B66B7/1207—Checking means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
Abstract
The present invention provides a kind of elevator safety monitoring system and elevator, it is related to communal facility field.Elevator safety monitoring system includes control unit, information acquisition unit and alarm unit；Information acquisition unit is used for the steel cable information for gathering elevator steel cable, wherein, the physical property of steel cable information representation elevator steel cable；Control unit is connected with information acquisition unit and alarm unit, for judging the use state of elevator steel cable according to steel cable information, and according to use state control alarm unit alarm.Elevator safety monitoring system provided by the invention can give warning in advance, and improve the security performance of elevator.
Description
Technical field
The present invention relates to communal facility field, and system and elevator are monitored in particular to a kind of elevator safety.
Background technology
With expanding economy, elevator apartment is more and more in city.Occur again and again on elevator safety accident in recent years.
After all problems reason occur mainly two aspects, defect of the first elevator device itself, the second maintenance personal specialty
Quality is uneven.
The consideration of safe link is all related in usual apparatus for controlling elevator.1. gate is detected by sensor (such as light curtain)
Whether someone, open the door again if someone, avoid crushing passenger.2. by judging safety return circuit (connecting and disconnecting of the circuit, by several peaces
The relevant switch series connection of loopful section, proves all switch closures if having led to, and the detection is represented as safety, if obstructed
Then indicate insecurity.).3. limiter of speed limits elevator speed, then promptly stop ladder more than threshold value.4. pit buffer ensures
For elevator if there is tenesmus, this buffer can buffer the elevator that stops, and reduce accident injury.Existing elevator can not early warning so that
Cause elevator safety performance poor.
The content of the invention
It is an object of the invention to provide a kind of elevator safety to monitor system, and elevator safety provided by the invention monitors system
It can give warning in advance, improve the security performance of elevator.
It is an object of the invention to provide a kind of elevator, elevator provided by the invention can give warning in advance, and improve elevator
Security performance.
The present invention provides a kind of technical solution：
A kind of elevator safety monitors system, including control unit, information acquisition unit and alarm unit；
Described information collecting unit is used for the steel cable information for gathering elevator steel cable, wherein, described in the steel cable information representation
The physical property of elevator steel cable；
Described control unit is connected with described information collecting unit and alarm unit, for judging according to the steel cable information
The use state of the elevator steel cable, and control the alarm unit alarm according to the use state.
Further, in preferred embodiments of the present invention, described information collecting unit includes image capture module；
Described image acquisition module is used for the image information for gathering the elevator steel cable；
Described control unit is connected with described image acquisition module, for judging the elevator steel according to described image information
Whether rope has geometrical defect, and when judging that the elevator steel cable has geometrical defect, controls the alarm unit to alarm.
Further, in preferred embodiments of the present invention, described control unit is used to contrast the graphical information and go through
History image, judges whether the elevator steel cable has geometrical defect.
Further, in preferred embodiments of the present invention, described information collecting unit further includes pulling force sensor；
The pulling force sensor is used for the pulling force for detecting the elevator steel cable, and calculates value of thrust；
Described control unit is connected with the pulling force sensor, for the value of thrust and default value of thrust, and
When the value of thrust is more than the default value of thrust, the alarm unit is controlled to alarm.
Further, in preferred embodiments of the present invention, the elevator safety monitoring system further includes elevator rail prison
Survey unit；
The elevator rail monitoring unit is used for the depth of parallelism for detecting elevator rail；
Described control unit is connected with the elevator rail monitoring unit, parallel with presetting for the depth of parallelism
Degree, and when the depth of parallelism exceedes the default depth of parallelism, control the alarm unit to alarm.
Further, in preferred embodiments of the present invention, the elevator rail monitoring unit includes the first Distance-sensing
Device and second distance sensor, first range sensor and the second distance sensor are separately positioned on the elevator rail
The both ends in road,
First range sensor is used to detect first distance of the elevator rail in the first position；
The second distance sensor is used to detect second distance of the elevator rail in the second place；
Described control unit is connected with first range sensor and the second distance sensor, for according to described in
First distance and the second distance calculate the depth of parallelism.
Further, in preferred embodiments of the present invention, it is single that the elevator safety monitoring system further includes circuit monitoring
Member, the lift loop include multiple hall door circuits, multiple hall door circuit in series, and the circuit monitoring unit is used to identify
The hall door circuit of generating loop failure.
Further, in preferred embodiments of the present invention, the circuit monitoring unit includes detection module, multiple distances
Sensor group and multiple identification modules, the range sensor group and the identification module are corresponded with the hall door circuit；
The range sensor group is used for the shutdown signal during gate closing for detecting the hall door circuit；
The detection module is used for the current signal that the lift loop is detected when the gate in hall door circuit is closed；
Multiple identification modules are used for when the detection module is not detected by the current signal, successively detection and institute
The corresponding hall door circuit of identification module is stated, to identify the hall door circuit of generating loop failure；
Described control unit is connected with the identification module, for detecting the loop fault when the identification module
When, control the alarm unit to alarm.
Further, in preferred embodiments of the present invention, the identification module is contact-relay, with multiple Rooms
Door circuit is in parallel, and multiple identification modules are used for when the detection module is not detected by the current signal, close successively,
Until the detection module detects the current signal, to position the loop fault.
A kind of elevator, including elevator safety monitoring system, the elevator safety monitoring system includes control unit, information is adopted
Collect unit and alarm unit；
Described information collecting unit is used for the steel cable information for gathering elevator steel cable, wherein, described in the steel cable information representation
The physical property of elevator steel cable；
Described control unit is connected with described information collecting unit and alarm unit, for judging according to the steel cable information
The use state of the elevator steel cable, and control the alarm unit alarm according to the use state.
Elevator safety monitoring system provided by the invention and the beneficial effect of elevator are：Information acquisition unit is used to gather electricity
The steel cable information of terraced steel cable, wherein, the physical property of steel cable information representation elevator steel cable；Control unit and information acquisition unit and
Alarm unit connects, and controls alarm single for judging the use state of elevator steel cable according to steel cable information, and according to use state
Member alarm.Elevator safety monitoring system provided by the invention can give warning in advance, and improve the security performance of elevator.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the composition frame chart that the elevator safety that the embodiment of the present invention one provides monitors system.
Fig. 2 is the composition frame chart for the information acquisition unit that the elevator safety that the embodiment of the present invention one provides monitors system.
Fig. 3 is the composition frame for the elevator rail monitoring unit that the elevator safety that the embodiment of the present invention one provides monitors system
Figure.
Fig. 4 is the composition frame chart for the circuit monitoring unit that the elevator safety that the embodiment of the present invention one provides monitors system.
Icon：100- elevator safeties monitor system；110- control units；120- information acquisition units；122- Image Acquisition
Module；124- pulling force sensors；130- alarm units；140- elevator rail monitoring unit；The first range sensors of 142-；144-
Second distance sensor；150- circuits monitoring unit；152- detection modules；154- range sensor groups；156- identification modules.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.The present invention implementation being usually described and illustrated herein in the accompanying drawings
The component of example can be arranged and designed with a variety of configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this area is common
Technical staff's all other embodiments obtained without creative efforts, belong to the model that the present invention protects
Enclose.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the present invention, it is to be understood that term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, or should
Invention product using when the orientation usually put or position relationship, or the orientation or position that those skilled in the art usually understand
Relation is put, it is of the invention necessary with simplified description, rather than the equipment or element of instruction or hint meaning to be for only for ease of description
With specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and it is not intended that instruction or hint
Relative importance.
In the description of the present invention, it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ",
" installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or one
Connect body；Can mechanically connect or be electrically connected；It can be directly connected, can also be indirect by intermediary
It is connected, can is the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
Embodiment one
Referring to Fig. 1, a kind of elevator safety monitoring system 100 is present embodiments provided, elevator peace provided in this embodiment
Full monitoring system 100 can improve the security performance of elevator.
In the present embodiment, elevator safety monitoring system 100 includes control unit 110, information acquisition unit 120 and alarm
Unit 130.
Information acquisition unit 120 is used for the steel cable information for gathering elevator steel cable, wherein, steel cable information representation elevator steel cable
Physical property.
Control unit 110 is connected with information acquisition unit 120 and alarm unit 130, for judging electricity according to steel cable information
The use state of terraced steel cable, and alarm according to use state control alarm unit 130.
In the present embodiment, the use state of elevator steel cable, and meeting are judged by gathering the steel cable information of elevator steel cable
Alarm unit 130 is controlled to alarm according to use state.It is in the present embodiment, it is possible to first pre- before safety problem occurs in elevator
It is alert, so as to improve the security performance of elevator.
In the present embodiment, stressing conditions of use state including elevator steel cable, surface abrasion degree, whether stranded etc..
Referring to Fig. 2, in the present embodiment, information acquisition unit 120 includes image capture module 122；Image Acquisition mould
Block 122 is used for the image information for gathering elevator steel cable.
Control unit 110 is connected with image capture module 122, for judging whether elevator steel cable has according to image information
Geometrical defect, and when judging that elevator steel cable has geometrical defect, control alarm unit 130 is alarmed.
In the present embodiment, control unit 110 is used for comparative pattern information and history image, judges whether elevator steel cable has
There is geometrical defect.
In the present embodiment, the history image of elevator steel cable, control unit 110 can be prestored in control unit 110
The image information that image capture module 122 is gathered is contrasted with history image, judges whether elevator steel cable has geometrical defect.When
Elevator steel cable there are during geometrical defect, alarm by control alarm unit 130.
In the present embodiment, geometrical defect includes surface abrasion and stranded.
In the present embodiment, when the surface abrasion of elevator steel cable reaches 50%, it is accredited as that there are geometrical defect.
In the present embodiment, image capture module 122 is industrial high speed camera.Time for exposure below 0.5ms will be modulated, led to
Excessive power LED light light filling, which just can guarantee that, photographs no smear, the good steel cable picture of effect.
In the present embodiment, image capture module 122 is continuously shot preset time, and control unit 110 uses a thread
Collection, the mode of operation that multiple threads preserve, the image information one that image capture module 122 is gathered in preset time
One discriminance analysis, judges whether geometrical defect.
In the present embodiment, information acquisition unit 120 further includes pulling force sensor 124；Pulling force sensor 124 is used to detect
The pulling force of elevator steel cable, and calculate value of thrust；
Control unit 110 is connected with pulling force sensor 124, for comparing value of thrust and default value of thrust, and in value of thrust
During more than default value of thrust, control alarm unit 130 is alarmed.
In the present embodiment, elevator steel cable includes more, and pulling force sensor 124 detects the pulling force of multiple elevator steel cables, and
Calculate the value of thrust of every elevator steel cable.Control unit 110 compares value of thrust and default value of thrust again, when value of thrust is more than in advance
If during value of thrust, control alarm unit 130 is alarmed.
It should be noted that in the present embodiment, information acquisition unit 120 includes image capture module 122 and pulling force passes
Sensor 124, gathers the image information of elevator steel cable respectively and value of thrust judges whether elevator steel cable is in safe work state.
But not limited to this, in other embodiments of the invention, other things of elevator steel cable can also be gathered by other modules
Rationality can just detect the use state of elevator steel cable.The scheme being equal with the present embodiment, can reach the effect of the present embodiment,
It is within the scope of the present invention.
Referring to Fig. 3, in the present embodiment, elevator safety monitoring system 100 further includes elevator rail monitoring unit 140；
Elevator rail monitoring unit 140 is used for the depth of parallelism for detecting elevator rail；
Control unit 110 is connected with elevator rail monitoring unit 140, for comparing the depth of parallelism and the default depth of parallelism, and
When the depth of parallelism exceedes the default depth of parallelism, control alarm unit 130 is alarmed.
In the present embodiment, elevator rail monitoring unit 140 includes the first range sensor 142 and second distance sensor
144, the first range sensor 142 and second distance sensor 144 are separately positioned on the both ends of elevator rail,
First range sensor 142 is used to detect first distance of the elevator rail in first position；
Second distance sensor 144 is used to detect second distance of the elevator rail in the second place；
Control unit 110 is connected with the first range sensor 142 and second distance sensor 144, for according to first away from
From and second distance calculate the depth of parallelism.
Referring to Fig. 4, in the present embodiment, elevator safety monitoring system 100 further includes circuit monitoring unit 150, elevator
Circuit includes multiple hall door circuits, multiple hall door circuit in series, and circuit monitoring unit 150 is used for the Room for identifying generating loop failure
Door circuit.
In the present embodiment, after hall door circuit generating loop failure, circuit monitoring unit 150 can recognize that multiple hall doors
The hall door circuit of generating loop failure in circuit, accomplishes the precise positioning of loop fault.Generating loop failure can directly be arrived
Hall door circuit carries out maintenance, the step of reducing monitoring circuit failure, improves maintenance efficiency.
In the present embodiment, circuit monitoring unit 150 includes detection module 152, multiple range sensor groups 154 and multiple
Identification module 156, range sensor group 154 and identification module 156 are corresponded with hall door circuit；
Range sensor group 154 is used for the shutdown signal during gate closing for detecting hall door circuit；
Detection module 152 is used for the current signal that lift loop is detected when the gate in hall door circuit is closed；
Multiple identification modules 156 are used for when detection module 152 is not detected by current signal, successively detection and identification module
156 corresponding hall door circuits, to identify the hall door circuit of generating loop failure；
Control unit 110 is connected with identification module 156, for when identification module 156 detects loop fault, control to be reported
Alert unit 130 is alarmed.
In the present embodiment, under normal circumstances, when gate is closed, hall door circuit closed, can produce electricity in lift loop
Stream.When range sensor group 154 detects that gate closes the current signal that still detection module 152 is not detected by lift loop
When, at least one hall door circuit produces loop fault in multiple hall door circuits, passes through identification mould corresponding with hall door circuit
Block 156 is i.e. recognizable to say loop fault.
In the present embodiment, identification module 156 is contact-relay, in parallel with multiple hall door circuits, multiple identification modules
156 are used for when detection module 152 is not detected by current signal, close successively, until detection module 152 detects that electric current is believed
Number, with position loop failure.
In the present embodiment, contact-relay is in parallel with hall door circuit, when detection module 152 is not detected by current signal
Afterwards, contact-relay closes one by one, and after one of contact-relay closes, detection module 152 detects current signal,
Illustrate that the hall door circuit that is correspondingly arranged with the contact-relay is normal, after detection module 152 is not detected by current signal, explanation
There are loop fault in hall door circuit corresponding with the contact-relay.So as to identify the hall door circuit with loop fault.
In the present embodiment, elevator safety monitoring system 100 further includes image collecting device (not shown), image collector
Put the display code for shooting elevator host.
Control unit 110 is connected with image collecting device, for comparing display code and prestored codes, whether judges elevator
Failure or fault type.
In the present embodiment, alarm unit 130 is gsm communication module, and when above-mentioned various failures occurs in elevator, control is single
Member 110 controls gsm communication module to send short message to the phone that prestores or call.
The operation principle of elevator safety monitoring system 100 provided in this embodiment：In the present embodiment, control unit 110
Judge whether elevator steel cable has geometrical defect according to image information, and when judging that elevator steel cable has geometrical defect, control
Alarm unit 130 is alarmed.When value of thrust is more than default value of thrust, control unit 110 controls alarm unit 130 to alarm.Work as electricity
When the depth of parallelism between terraced track exceedes the default depth of parallelism, control unit 110 controls alarm unit 130 to alarm.When hall door circuit
When detecting loop fault, control unit 110 controls alarm unit 130 to alarm.
In conclusion elevator safety provided in this embodiment monitoring system 100, steel cable information that can be according to elevator, electricity
The information such as the depth of parallelism of terraced track carry out early warning, improve the security performance of elevator.
Embodiment two
A kind of elevator is present embodiments provided, elevator provided in this embodiment can improve the security performance of elevator.
In order to briefly describe, the present embodiment does not refer to that part can refer to embodiment one.
In the present embodiment, the elevator safety monitoring system 100 that lift car, multiple hall doors and embodiment one provide.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of elevator safety monitors system, it is characterised in that including control unit, information acquisition unit and alarm unit；
Described information collecting unit is used for the steel cable information for gathering elevator steel cable, wherein, elevator described in the steel cable information representation
The physical property of steel cable；
Described control unit is connected with described information collecting unit and alarm unit, described in judging according to the steel cable information
The use state of elevator steel cable, and control the alarm unit alarm according to the use state.
2. elevator safety according to claim 1 monitors system, it is characterised in that described information collecting unit includes image
Acquisition module；
Described image acquisition module is used for the image information for gathering the elevator steel cable；
Described control unit is connected with described image acquisition module, for judging that the elevator steel cable is according to described image information
It is no that there is geometrical defect, and when judging that the elevator steel cable has geometrical defect, control the alarm unit to alarm.
3. elevator safety according to claim 2 monitors system, it is characterised in that described control unit is used to contrast described
Graphical information and history image, judge whether the elevator steel cable has geometrical defect.
4. elevator safety according to claim 1 monitors system, it is characterised in that described information collecting unit further includes drawing
Force snesor；
The pulling force sensor is used for the pulling force for detecting the elevator steel cable, and calculates value of thrust；
Described control unit is connected with the pulling force sensor, for the value of thrust and default value of thrust, and described
When value of thrust is more than the default value of thrust, the alarm unit is controlled to alarm.
5. elevator safety according to claim 1 monitors system, it is characterised in that the elevator safety monitoring system is also wrapped
Include elevator rail monitoring unit；
The elevator rail monitoring unit is used for the depth of parallelism for detecting elevator rail；
Described control unit is connected with the elevator rail monitoring unit, for the depth of parallelism and the default depth of parallelism, and
When the depth of parallelism exceedes the default depth of parallelism, the alarm unit is controlled to alarm.
6. elevator safety according to claim 5 monitors system, it is characterised in that the elevator rail monitoring unit includes
First range sensor and second distance sensor, first range sensor and the second distance sensor are set respectively
In the first position of the elevator rail and the second place,
First range sensor is used to detect first distance of the elevator rail in the first position；
The second distance sensor is used to detect second distance of the elevator rail in the second place；
Described control unit is connected with first range sensor and the second distance sensor, for according to described first
Distance and the second distance calculate the depth of parallelism.
7. elevator safety according to claim 1 monitors system, it is characterised in that the elevator safety monitoring system is also wrapped
Circuit monitoring unit is included, the lift loop includes multiple hall door circuits, multiple hall door circuit in series, the circuit monitoring
Unit is used for the hall door circuit for identifying generating loop failure.
8. elevator safety according to claim 7 monitors system, it is characterised in that the circuit monitoring unit includes detection
Module, multiple range sensor groups and multiple identification modules, the range sensor group and the identification module and the hall door
Circuit corresponds；
The range sensor group is used for the shutdown signal during gate closing for detecting the hall door circuit；
The detection module is used for the current signal that the lift loop is detected when the gate in hall door circuit is closed；
Multiple identification modules are used for when the detection module is not detected by the current signal, successively detection and the knowledge
The corresponding hall door circuit of other module, to identify the hall door circuit of generating loop failure；
Described control unit is connected with the identification module, for when the identification module detects the loop fault, controlling
Make the alarm unit alarm.
9. elevator safety according to claim 8 monitors system, it is characterised in that the identification module is contact relay
Device, in parallel with multiple hall door circuits, multiple identification modules are used for when the detection module is not detected by the electric current
During signal, close successively, until the detection module detects the current signal, to position the loop fault.
10. a kind of elevator, it is characterised in that monitor system including such as claim 1-9 any one of them elevator safety.
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| CN201711466114.5A CN108016965B (en) | 2017-12-28 | 2017-12-28 | Elevator safety monitoring |
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|---|---|---|---|
| CN201711466114.5A CN108016965B (en) | 2017-12-28 | 2017-12-28 | Elevator safety monitoring |
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Cited By (6)
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| CN109626164A (en) * | 2018-12-24 | 2019-04-16 | 浙江工商大学 | A kind of lift running safety monitoring system based on Internet of Things |
| CN109896391A (en) * | 2019-02-28 | 2019-06-18 | 杭州西奥电梯有限公司 | A kind of elevator safety monitoring System and method for based on Internet of Things |
| CN111071898A (en) * | 2018-10-18 | 2020-04-28 | 奥的斯电梯公司 | On-site system for health monitoring of elevator system |
| CN111453572A (en) * | 2020-04-15 | 2020-07-28 | 广东省特种设备检测研究院珠海检测院 | Elevator door lock ground fault detection and positioning method |
| CN112699757A (en) * | 2020-12-24 | 2021-04-23 | 武汉龙发包装有限公司 | Goods elevator safety monitoring method and system for transporting cartons |
| CN113620133A (en) * | 2021-07-24 | 2021-11-09 | 美迪斯智能装备有限公司 | Operation monitoring system of elevator and elevator |
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