CN104401833B - A kind of elevator reparing maintenance recording method, system and device - Google Patents
A kind of elevator reparing maintenance recording method, system and device Download PDFInfo
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- CN104401833B CN104401833B CN201410652208.1A CN201410652208A CN104401833B CN 104401833 B CN104401833 B CN 104401833B CN 201410652208 A CN201410652208 A CN 201410652208A CN 104401833 B CN104401833 B CN 104401833B
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- maintenance
- power consumption
- elevator
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- time
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Classifications
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- 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
- B66B5/0025—Devices monitoring the operating condition of the elevator system for maintenance or repair
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
- B66B3/002—Indicators
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
Abstract
The invention belongs to elevator technology field, specifically disclose a kind of elevator reparing maintenance recording method, system and device.Its method comprises the following steps: the elevator arriving Real-time Collection runs power, is integrated obtaining the actual cumulative power consumption of elevator by power over time；Judge described actual cumulative power consumption whether more than or equal to the power consumption threshold value preset；When actual cumulative power consumption is more than or equal to the power consumption threshold value preset, sends maintenance and remind or alarm signal.The present invention can not only more accurately record, calculate and remind elevator reparing maintenance period, and while improving elevator safety reliability, reduces repair and maintenance cost.
Description
Technical field
The invention belongs to elevator technology field, be specifically related to a kind of elevator reparing maintenance recording method, system and device.
Background technology
Elevator is a kind of vertical conveyor with motor as power, equipped with box like gondola, takes advantage of people or carrying goods for tier building
Thing.Also having step, step plate is contained in and runs continuously on crawler belt, is commonly called as automatic elevator.
Elevator belongs to special equipment, the regulation all such as the national production to special equipment, operation, use, detection, inspection.
Elevator is during coming into operation, and the ordinary maintenance maintenance of elevator is especially important, and elevator mainteinance take good care of lift refers to
Periodically carry out to the elevator components running checking, refuel, remove laying dust, the work of debugging safety device.
At present in terms of the maintenance of elevator, Main Basis two aspect:
1st, according to related data statistics or standard, artificially defined elevator reparing maintenance period, such as specify 1 week to carry out once
Maintenance, then later with regard to periodically carrying out regular repair and maintenance once week about.The frequency using due to different occasion elevators is not
With, have and do not confirm that in a large number factor causes elevator actually used frequency differing within the identical time cycle.Use statistical analysis
Or the way handled affairs according to the rules, two problems, or the overstocked wasting manpower and material resources of repair and maintenance may be caused, or repair and maintenance are not in time
Bring potential safety hazard.
2nd, the state using machine to run elevator monitors in real time, once occurs that abnormal horse back sends alarm.This is at electricity
Ladder technical field gets a lot of applications, and this kind of repair and maintenance technology also has substantial amounts of patent application, such as China
The elevator fortune that a kind of Elevator safety precaution system of ZL201020037698.1 patent, ZL200620053340.1 data are wirelessly transferred
Row recorder, ZL200420107304.X Lift static and kinestatic data grapher, ZL201020037699.6 elevator run note
Record instrument, 201310245567.0 1 kinds of elevator total management systems and elevator integrated management approach etc..This kind of technology is all to supervise in real time
The property surveyed technology, just sends related warning or takes certain measure when only elevator goes wrong, can not really play elevator dimension
Protect desired prevention effect.
Content of the invention
In order to solve technical problem present in existing maintenance, it is an object of the invention to provide a kind of elevator reparing maintenance note
Recording method, system and device, can more accurately record, calculate and remind elevator reparing maintenance period, is improving elevator peace
While full reliability, reduce repair and maintenance cost.
In order to realize foregoing invention purpose, the technical solution adopted in the present invention is as follows:
A kind of elevator reparing maintenance recording method, comprises the following steps:
The elevator arriving Real-time Collection runs power, is integrated obtaining the actual cumulative power consumption of elevator by power over time；
Judge described actual cumulative power consumption whether more than or equal to the power consumption threshold value preset；
When actual cumulative power consumption is more than or equal to the power consumption threshold value preset, sends maintenance and remind or alarm signal.
Further, also include after sending maintenance prompting or alarm signal:
Accept user and maintain instruction, record the maintenance time, and store the corresponding currently practical cumulative power consumption of service time；
Reset the power consumption threshold value of next maintenance period.
A kind of elevator reparing maintenance record system, including with lower module:
Actual cumulative power consumption computing module, is run power for the elevator arriving Real-time Collection, is integrated by power over time
Obtain the actual cumulative power consumption of elevator；
Whether maintenance computation of Period module, for judging described actual cumulative power consumption more than or equal to the power consumption threshold value preset；
Maintenance prompting module, for when actual cumulative power consumption is more than or equal to the power consumption threshold value preset, sending maintenance
Remind or alarm signal.
Further, this system also includes with lower module:
Maintenance log module, maintains instruction for accepting user after sending maintenance prompting or alarm signal,
The record maintenance time, and store the corresponding currently practical cumulative power consumption of service time；
Next maintenance period computing module, for resetting the power consumption threshold value of next maintenance period.
A kind of elevator reparing maintenance tape deck, comprising:
Current transformer, for gathering the current value of elevator main circuit；
Voltage transformer, for gathering the magnitude of voltage of elevator main circuit；
Power programmer, is connected with described current transformer and voltage transformer, based on according to the electric current collecting and magnitude of voltage
Calculate and obtain the realtime power that elevator runs；
Central processing unit, is connected with described power programmer, runs power for the elevator arriving Real-time Collection, by power pair
Whether the time is integrated obtaining the actual cumulative power consumption of elevator, and judge described actual cumulative power consumption more than or equal to the work(preset
Consumption threshold value, when actual cumulative power consumption is more than or equal to the power consumption threshold value preset, sends maintenance and reminds or alarm signal.
Further, described central processing unit is additionally operable to, after sending maintenance prompting or alarm signal, accept user's maintenance
Maintenance instruction, records the maintenance time, stores the corresponding currently practical cumulative power consumption of service time, and resets the next one
The power consumption threshold value of maintenance period.
Further, current filtering circuit, is connected between current transformer and power programmer, signal when being used for filtering sampling
Waveform burr；Voltage filtering circuit, is connected between voltage transformer and power programmer, signal waveform when being used for filtering sampling
Burr.
Further, it is also associated with clock circuit and memory at described central processing unit.
Further, described central processing unit is also associated with gather the card reader that user maintains instruction.
Further, described central processing unit is also associated with for output repair maintenance remind or alarm signal indicator lamp and/or
Data communication module.
The present invention breaches tradition and measures repair and maintenance cycle or the conventional thought of moment monitoring abnormal operation of elevator situation with the time, logical
Cross integration and accurately obtain the actual motion power consumption parameter of elevator, and determine the need for tieing up by this actual cumulative power consumption
Protecting, the condition (power consumption threshold value) setting as reached repair and maintenance is issued by maintenance and reminds or alarm signal.The present invention is relative to now
Some repair and maintenance technology, can more accurately obtain the actual operating state of elevator, determined by the repair and maintenance cycle will be more preferably accurate
And science, and then while improving elevator safety reliability, reduce repair and maintenance cost.
Brief description
Fig. 1 is the method flow diagram of the present invention；
Fig. 2 is the system block diagram of the present invention；
Fig. 3 is the circuit structure diagram of elevator reparing of the present invention maintenance tape deck.
Detailed description of the invention
In order to be fully understood from the purpose of the present invention, feature and effect, below with reference to accompanying drawing to the design of the present invention, specifically tie
The technique effect of structure and generation is described further.
Embodiment 1
As it is shown in figure 1, present embodiment discloses a kind of elevator reparing maintenance recording method, comprise the following steps:
S01, the elevator arriving Real-time Collection run power, are integrated obtaining the actual cumulative power consumption of elevator by power over time,
Concrete formula can be such thatWherein: W is border power consumption, P (t) is the power that elevator runs, and t is the time,
The t1=0 for example starting, t2=1 hour, P (t) is constant is 1 kilowatt, then W=1 kilowatt hour；Why this step uses integration,
The P (t) being because in elevator actual moving process is an amount being continually changing, different occasions, different application, different time,
All may differ, previous example is only a special case, therefore uses the mode of integration relatively can obtain accurately actual tired
Meter power consumption；
S02, judge described actual cumulative power consumption whether more than or equal to the power consumption threshold value preset, the power consumption threshold value reality of this step is just
Be equivalent to a maintenance period, such as often run 10 kilowatt hours according to the actual conditions of elevator and maintain 1 time, relatively rationally, then
Just sets position power consumption threshold value as 10 kilowatt hours, meet or exceed this power consumption threshold value once the power consumption of elevator operation and just trigger next
Step；
S03, when actual cumulative power consumption more than or equal to preset power consumption threshold value when, send maintenance remind or alarm signal, this
The power consumption threshold value setting in step, in the actual cycle being equal to repair and maintenance, simply this repair and maintenance cycle is relative to being measured by the time merely
Cycle more fit elevator running state, also more science；Maintenance described in this step is reminded or reports to the police, and may refer to show
Lamp is reminded or reports to the police, and can be sound and light alarm, it is possible to use various communication modes realize closely or long-range warning, such as GPRS
Communication mode, Ethernet mode etc. are all the protection domains of the application；
S04, accept user and maintain instruction, record the maintenance time, and it is corresponding currently practical accumulative to store service time
Power consumption；This step and next step reality are all the effects played record and reset, and after once warning reminding triggers, repair and maintenance workman will
Go on request to maintain elevator, once starting to maintain or maintain to complete, being typically necessary and carrying out a record to maintenance,
In order to inquire about from now on, this step accepts repair and maintenance workman exactly and maintains instruction, then record the maintenance time, and store guarantor
Support time corresponding currently practical cumulative power consumption, certainly can also record some other parameters such as, identity of maintenance people etc.,
These are all the protection domains of the application；
S05, the power consumption threshold value resetting next maintenance period, once maintained, then is accomplished by carrying out next guarantor
Power consumption parameter is such as made zero by the calculating in the cycle of supporting, then the power consumption threshold value of next maintenance period then keeps constant, then maintenance
After actual cumulative power consumption will again send prompting or report to the police when reaching same power consumption threshold value last time；Power consumption can not certainly be said
Parameter makes zero, but plus the maintenance power consumption threshold value preset on current power consumption parameter basis, this scheme is the optimal choosing of the application
Select scheme, not only need not reset, and the setting of maintenance period is also reasonable；Certainly, the setting of this power consumption threshold value is all right
Being a fixing function, maintenance time point is that power consumption reaches 5 kilowatt hours, second time maintenance time point is that power consumption reaches such as the first time
10 kilowatt hours, third time maintenance time point are that power consumption reaches 15 kilowatt hours, and maintenance period is identical；Or maintenance period gradually contracts
Maintenance of short first time time point is that power consumption reaches 5 kilowatt hours, second time maintenance time point is that power consumption reaches 9.5 kilowatt hours, third time is protected
Foster time point is that power consumption reaches 13.5 kilowatt hours, and maintenance period was gradually shortened with the use of elevator more maintenance later stages.The application is
What to reset the power consumption threshold value of maintenance period, after sending maintenance prompting such as the first time, when workman has crossed very long
Between just carry out repair and maintenance, if do not reset, it is likely that what situation occurs, it is simply that just maintained, sends again prompting,
So just less reasonable, first time of the maintenance power consumption threshold value being such as fixedly installed maintenance time point be power consumption reach 5 kilowatt hours,
Second time maintenance time point is that power consumption reaches 10 kilowatt hours, third time maintenance time point is that power consumption reaches 15 kilowatt hours, maintenance for the first time
After completing, elevator continues to run, and elevator having run to 8 kilowatt hours and just maintained, if do not reset, having arrived
When 10 kilowatt hours are with regard to reminding again, just less reasonable；
As in figure 2 it is shown, the present embodiment also discloses a kind of consistent elevator reparing maintenance record system completely corresponding with said method,
Including with lower module:
Actual cumulative power consumption computing module 1, is run power for the elevator arriving Real-time Collection, is amassed by power over time
Get the actual cumulative power consumption of elevator；
Whether maintenance computation of Period module 2, for judging described actual cumulative power consumption more than or equal to the power consumption threshold value preset；
Maintenance prompting module 3, for when actual cumulative power consumption is more than or equal to the power consumption threshold value preset, sending maintenance and protecting
Support and remind or alarm signal.
Maintenance log module 4, maintains instruction for accepting user after sending maintenance prompting or alarm signal,
The record maintenance time, and store the corresponding currently practical cumulative power consumption of service time；
Next maintenance period computing module 5, for resetting the power consumption threshold value of next maintenance period.
The present embodiment is accurately obtained the actual motion power consumption parameter of elevator by integration, and is determined by this actual cumulative power consumption
The need of carrying out repair and maintenance, the condition (power consumption threshold value) setting as reached repair and maintenance is issued by maintenance and reminds or alarm signal.
The present invention, relative to existing repair and maintenance technology, can more accurately obtain the actual operating state of elevator, determined by repair and maintenance week
Phase is by more preferably accurately science, and then while improving elevator safety reliability, reduces repair and maintenance cost.
Embodiment 2
As it is shown on figure 3, present embodiment discloses a kind of elevator reparing maintenance tape deck, this device includes:
Current transformer, for gathering the current value of elevator main circuit；Current transformer principle is based on electromagnetic induction principle,
Current transformer is made up of the iron core closing and winding；Its umber of turn is little, and string is at the line of the electric current needing measurement
Lu Zhong, therefore it often has whole electric currents of circuit to flow through, and Secondary Winding turn ratio is more, is serially connected in measuring instruments and protects back
Lu Zhong, operationally, its 2 minor loops are Guan Bis to current transformer all the time, therefore measuring instruments and protective loop series line
The impedance of circle is very little, and the duty of current transformer is close to short circuit；
Voltage transformer, for gathering the magnitude of voltage of elevator main circuit；Voltage transformer is a transformer with iron core.It is main
To be made up of first and second coil, iron core and insulation；When applying a voltage U1 on a winding, just produce in iron core
A raw magnetic flux, according to the law of electromagnetic induction, then in Secondary Winding, just produce a secondary voltage U2；Change once or two
The number of turn of secondary winding, can produce different primary voltages and secondary voltage ratio, and this can form not voltage transformer on year-on-year basis；
Power programmer, is connected with described current transformer and voltage transformer, based on according to the electric current collecting and magnitude of voltage
Calculate and obtain the realtime power that elevator runs；The present embodiment select be CS5490 binary channels electric energy metrical IC, current sensor,
The flexibility of serial communication and numeral output facet ensure that CS5490 is suitable for any application of needs high accuracy electric energy metrical, with
When price very low；It, except measuring/calculate meritorious, idle and apparent energy, can also measure/calculate effective voltage and electricity
Stream, power factor and line frequency, instantaneous voltage, electric current and power, be especially suitable for the application and gather what elevator ran in real time
Power, can also record voltage and current all the time, in order to for judgement and the application of other exceptions；
Central processing unit, is connected with described power programmer, runs power for the elevator arriving Real-time Collection, by power pair
Whether the time is integrated obtaining the actual cumulative power consumption of elevator, and judge described actual cumulative power consumption more than or equal to the work(preset
Consumption threshold value, when actual cumulative power consumption is more than or equal to the power consumption threshold value preset, sends maintenance and reminds or alarm signal.
So that the repair and maintenance cycle that the application device sets can be more reasonable, central processing unit is additionally operable to sending maintenance
Reminding or after alarm signal, accepting user and maintain instruction, record the maintenance time, storage service time is corresponding works as
Front actual cumulative power consumption, and reset the power consumption threshold value of next maintenance period.
Certainly, in order to ensure the operation of device own, this device also includes the peripheral circuit of some routines, such as in described central authorities
Processor is also associated with clock circuit and memory etc., the power consumption in each moment of record, virtual voltage/electric current etc. in memory,
Contribute to elevator faults etc. to analyze and application.
In order to filter burr improve circuit reliability, this device be also in series with between current transformer and power programmer one for
The current filtering circuit of signal waveform burr when filtering sampling, this device is also in series with between voltage transformer and power programmer
One for filter sampling when signal waveform burr voltage filtering circuit.Record repair and maintenance for convenience and calculate the next repair and maintenance cycle,
Being also associated with gathering the card reader that user maintains instruction on described central processing unit, after Card Reader, central processing unit will set again
Put the next repair and maintenance cycle.
For the ease of reminding or reporting to the police, the application is also associated with repairing maintenance for output on described central processing unit and reminds or report to the police
The indicator lamp of signal and/or data communication module, described data communication module includes RS232/485, USB interface, GPR communication
Module, Ethernet interface, SMS communication module etc..It should be noted that everything is connected on central processing unit to protect
The device that foster prompting or alarm signal are transmitted out is all the protection domain of the application.
It should be noted that everything uses integration to obtain elevator actual motion power consumption, and judge maintenance period by power consumption,
It is all the protection domain of this patent.
The preferred embodiment of the present invention described in detail above, it will be appreciated that those of ordinary skill in the art is without creating
Property work just can make many modifications and variations according to the design of the present invention.Therefore, all technical staff in the art are according to this
Inventive concept on the basis of prior art by logic analysis, reasoning or according to the limited available technical scheme of experiment,
All should be among protection domain determined by the claims.
Claims (10)
1. an elevator reparing maintenance recording method, it is characterised in that comprise the following steps:
The elevator arriving Real-time Collection runs power, is integrated obtaining the actual cumulative power consumption of elevator by power over time；
Judge described actual cumulative power consumption whether more than or equal to the power consumption threshold value preset；
When actual cumulative power consumption is more than or equal to the power consumption threshold value preset, sends maintenance and remind or alarm signal.
2. elevator reparing according to claim 1 maintenance recording method, it is characterised in that: send maintenance remind or
Also include after alarm signal:
Accept user and maintain instruction, record the maintenance time, and store the corresponding currently practical cumulative power consumption of service time；
Reset the power consumption threshold value of next maintenance period.
3. an elevator reparing maintenance record system, it is characterised in that include with lower module:
Actual cumulative power consumption computing module, is run power for the elevator arriving Real-time Collection, is integrated by power over time
Obtain the actual cumulative power consumption of elevator；
Whether maintenance computation of Period module, for judging described actual cumulative power consumption more than or equal to the power consumption threshold value preset；
Maintenance prompting module, for when actual cumulative power consumption is more than or equal to the power consumption threshold value preset, sending maintenance
Remind or alarm signal.
4. elevator reparing according to claim 3 maintenance record system, it is characterised in that this system also includes with lower module:
Maintenance log module, maintains instruction for accepting user after sending maintenance prompting or alarm signal,
The record maintenance time, and store the corresponding currently practical cumulative power consumption of service time；
Next maintenance period computing module, for resetting the power consumption threshold value of next maintenance period.
5. an elevator reparing maintenance tape deck, it is characterised in that include:
Current transformer, for gathering the current value of elevator main circuit；
Voltage transformer, for gathering the magnitude of voltage of elevator main circuit；
Power programmer, is connected with described current transformer and voltage transformer, based on according to the electric current collecting and magnitude of voltage
Calculate and obtain the realtime power that elevator runs；
Central processing unit, is connected with described power programmer, runs power for the elevator arriving Real-time Collection, by power pair
Whether the time is integrated obtaining the actual cumulative power consumption of elevator, and judge described actual cumulative power consumption more than or equal to the work(preset
Consumption threshold value, when actual cumulative power consumption is more than or equal to the power consumption threshold value preset, sends maintenance and reminds or alarm signal.
6. elevator reparing according to claim 5 maintenance tape deck, it is characterised in that:
Described central processing unit is additionally operable to, after sending maintenance prompting or alarm signal, accept user and maintain instruction,
The record maintenance time, store the corresponding currently practical cumulative power consumption of service time, and reset next maintenance period
Power consumption threshold value.
7. the elevator reparing maintenance tape deck according to claim 5 or 6, it is characterised in that include:
Current filtering circuit, is connected between current transformer and power programmer, signal waveform burr when being used for filtering sampling；
Voltage filtering circuit, is connected between voltage transformer and power programmer, signal waveform burr when being used for filtering sampling.
8. the elevator reparing maintenance tape deck according to claim 5 or 6, it is characterised in that include:
It is also associated with clock circuit and memory at described central processing unit.
9. the elevator reparing maintenance tape deck according to claim 5 or 6, it is characterised in that include:
Described central processing unit is also associated with gather the card reader that user maintains instruction.
10. the elevator reparing maintenance tape deck according to claim 5 or 6, it is characterised in that include:
Described central processing unit is also associated with repair indicator lamp and/or the data communication maintaining prompting or alarm signal for output
Module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410652208.1A CN104401833B (en) | 2014-11-17 | 2014-11-17 | A kind of elevator reparing maintenance recording method, system and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410652208.1A CN104401833B (en) | 2014-11-17 | 2014-11-17 | A kind of elevator reparing maintenance recording method, system and device |
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| Publication Number | Publication Date |
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| CN104401833A CN104401833A (en) | 2015-03-11 |
| CN104401833B true CN104401833B (en) | 2016-10-05 |
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| CN201410652208.1A Expired - Fee Related CN104401833B (en) | 2014-11-17 | 2014-11-17 | A kind of elevator reparing maintenance recording method, system and device |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891290A (en) * | 2015-04-29 | 2015-09-09 | 中联重科股份有限公司 | Reminding message sending system, method and device and construction elevator |
| CN106682741A (en) * | 2016-11-16 | 2017-05-17 | 国网山东省电力公司青岛供电公司 | Equipment maintenance method and equipment maintenance device |
| CN107194477A (en) * | 2017-06-13 | 2017-09-22 | 芜湖桑乐金电子科技有限公司 | The maintaining method of heating picture |
| CN107132781A (en) * | 2017-06-13 | 2017-09-05 | 芜湖桑健电子科技有限公司 | Maintaining method between Saunas |
| CN107192004A (en) * | 2017-06-13 | 2017-09-22 | 芜湖桑乐金电子科技有限公司 | Automatically the heating picture pointed out |
| DE102019206984A1 (en) * | 2018-05-31 | 2019-12-05 | Robert Bosch Engineering And Business Solutions Private Limited | AN INSPECTION-FREE ELEVATOR MONITOR |
| SG11202012606TA (en) | 2018-07-19 | 2021-02-25 | Inventio Ag | Method and device for monitoring a state of a passenger transport system using a digital double |
| CN109726831A (en) * | 2018-11-29 | 2019-05-07 | 深圳市元征科技股份有限公司 | A kind of corrective maintenance based reminding method and device |
| CN112811275B (en) * | 2020-12-30 | 2022-05-20 | 重庆厚齐科技有限公司 | Elevator maintenance-on-demand period measuring and calculating system and method based on Internet of things |
| CN112830358B (en) * | 2020-12-30 | 2022-05-20 | 重庆厚齐科技有限公司 | System and method for predicting elevator maintenance cycle on demand by machine learning |
| CN112830357B (en) * | 2020-12-30 | 2022-05-17 | 重庆厚齐科技有限公司 | System and method for measuring and calculating elevator health value based on Internet of things and big data |
| CN113060613B (en) * | 2021-03-31 | 2022-09-09 | 浙江新再灵科技股份有限公司 | Elevator maintenance real-time identification method based on multi-source internet of things data |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8028807B2 (en) * | 2004-11-09 | 2011-10-04 | Inventio Ag | Remote recording of maintenance operations for an elevator or escalator installation |
| JP5517432B2 (en) * | 2008-10-16 | 2014-06-11 | 三菱電機株式会社 | Elevator safety system |
| CN102285565A (en) * | 2011-07-20 | 2011-12-21 | 广州市特种机电设备检测研究院 | Automatic recognition method for overhaul running state of elevator |
| CN202346530U (en) * | 2011-11-01 | 2012-07-25 | 大连科信起重电器有限公司 | Motor protection system for construction hoist |
| CN102826437B (en) * | 2012-09-18 | 2014-07-30 | 广州市特种机电设备检测研究院 | Device for recording and monitoring running of staircase |
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