CN106744161A - A kind of method and system for monitoring the elevator traction medium life-span - Google Patents
A kind of method and system for monitoring the elevator traction medium life-span Download PDFInfo
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- CN106744161A CN106744161A CN201611228396.0A CN201611228396A CN106744161A CN 106744161 A CN106744161 A CN 106744161A CN 201611228396 A CN201611228396 A CN 201611228396A CN 106744161 A CN106744161 A CN 106744161A
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- traction medium
- elevator
- elevator traction
- span
- life
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Classifications
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- 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
- B66B7/1215—Checking means specially adapted for ropes or cables
Abstract
The invention discloses a kind of method and system for monitoring the elevator traction medium life-span, wherein, the method for monitoring the elevator traction medium life-span is comprised the following steps：The bending of elevator traction medium unit length is monitored, in elevator run time, bending number of times is carried out respectively to elevator traction medium constituent parts length in real time and is added up, the life-span of elevator traction medium is weighed with the bending number of times the maximum that added up in unit length.The method and system in the monitoring elevator traction medium life-span that the present invention is provided, can accurately monitor the service life of elevator traction medium, be conducive to the supervision of repair and maintenance, and ensure the safety of elevator operation.
Description
Technical field
The present invention relates to elevator technology field, and in particular to a kind of method and system in monitoring elevator traction medium life-span.
Background technology
Using the elevator of traditional traction hanging steel rope, wire and strand breaking can be recognized by naked eyes viewing in repair and maintenance,
When steel wire rope occurs levigate, also by the instrument accurate measurement such as slide calliper rule, and whether the conclusion for meeting the condition of scrapping can be drawn.《GB/
T31821-2015 elevator critical pieces scrap technical conditions》Define traction hanging steel rope scraps condition, refers to《GB/
T31821-2015》4.4.2 save, by kind of calliper diameter, and determine whether to reach with reference to steel rope fault quantity and scrap.
With the development of traction suspension arrangement technology, the traction medium of elevator occurs in that flat steel band or carbon fiber are flat
Band, the type product is formed in the outside coated high molecular material of steel wire rope or carbon fiber tape, and macromolecular material is mainly adopted
With polyurethane, the wire and strand breaking of inner cable or is attenuated cannot all be recognized by naked eyes,《GB/T31821-2015 elevator masters
Want component exhaustion technical conditions》4.4.4 regulation there are one of following situations, be considered as to reach and scrap technical conditions：
A) there is crackle, impression, bending, puncture, depression or bulge in steel band；
B) any one rope strand fracture in steel band；
C) steel strip surface abrasion or damage expose inner wire；
D) there is serious corrosion in steel band；
E) steel band traction does not meet 9.3a in GB7588-2003) or b) requirement.
From scrapping in terms of technical conditions, a)~d) all it is to judge from outside by estimation mode, but it is not directed to inner wire
That restricts sentences useless technical conditions.
By retrieving Chinese patent, notification number is a kind of for elevator for the patent of invention document of CN101362570B is disclosed
Cable diagnostic system, including data determination portion, stopping time or enabling of the data determination portion to car in foundation floor
Number of times is measured, and as real data.In implementation, specify that the hawser is the conventional traction steel wire for meeting GB
Rope, you can to recognize and judge by naked eyes, if meet the condition of scrapping.
Data determination portion in above-mentioned patent, by the floor stopping time or door opening times and and predicted value that gather elevator
Compare whether to judge traction medium in scrapping state, acquired results are inaccurate because the floor stopping time of elevator or
Door opening times are all discrete discrete messages of interruption, and traction medium is all continuous with the contact of traction sheave or directive wheel
, because discrete message coverage has missing, the appearance of weak link can be caused, so as to cause potential safety hazard.
Meanwhile, the patent of invention document of Publication No. CN101362570B and needs only for the diagnosis of ordinary steel rope
Hardware and software are all improved, the operating cost of elevator is improve.
The content of the invention
The invention provides a kind of method and system for monitoring the elevator traction medium life-span, can accurately monitor elevator and drag
Draw the service life of medium, be conducive to the supervision of repair and maintenance, and ensure the safety of elevator operation.
A kind of method for monitoring the elevator traction medium life-span, comprises the following steps：
The bending of elevator traction medium unit length is monitored, it is each to elevator traction medium in real time in elevator run time
Unit length carries out bending number of times and adds up respectively, and to be added up in unit length, bending number of times the maximum weighs elevator traction medium
Life-span.
Elevator traction suspension includes drive system, car, counterweight and traction medium, and traction medium is used to drive
The movement output of system is transferred to car and counterweight, and is established a connection between car and counterweight, by car and to resuspended
Hang in drive system.
Traction medium can use traditional steel wire rope, it would however also be possible to employ flexible flat belt-like structure, for example steel band or
Person's carbon fiber tape (in the Flat belt that the outside coated high molecular material of steel wire rope or carbon fiber tape is formed).
In elevator traction suspension, traction medium around the home on multiple active wheels, for draging for flexible flat banding
Draw medium, because the stress traction element such as steel wire rope or carbon fiber tape is internally positioned, in the process (counterweight of car upstream or downstream
Correspondingly downlink or uplink) in, traction medium can not stall around corresponding active wheel, but stress traction element is not directly and work
Make wheel contact, thus will not also produce abrasion, using the disconnected rope quantity of traditional measurement, or wear extent of restricting weighs traction medium
Life-span is infeasible.
In different elevator traction suspension, the installation site and quantity of active wheel are all had any different, the work
Wheel is at least including the driving main frame traction sheave of elevator device, crosshead sheave, to roller, computer room directive wheel, hoistway directive wheel.Setting is led
Occasion to wheel has various, for example, changing the direction around the home of traction medium, or changes bag of the traction medium around a certain active wheel
Angle.
Drawing the Failure Factors of force-summing element includes tractive force and bending, and tractive force pumps for providing car
Power, be the index of a relative quiescent, be not easy to monitoring, the present invention draged to weigh by monitoring the bending number of times of traction medium
Draw the service life of medium, the true loss situation of traction medium can be objectively responded.
In unit length add up bending number of times the maximum reflect in whole run times of elevator, traction medium it is curved
Folding situation, the server of elevator can transfer the cumulative bending number of times of constituent parts length, so as to the service condition to elevator is carried out
Overall monitor.
Preferably, any point on elevator traction medium is taken as starting point, with residing for active wheel on elevator traction medium
The distance of position and starting point as corresponding active wheel absolute position；
Normally run in elevator or during abnormal running, detect the homeposition of active wheel and the distance of destination locations, according to
Absolute position varied sections are drawn according to the distance between homeposition and destination locations change calculations, in the varied sections of absolute position
Traction medium bend.
The abnormal running of elevator mainly includes operation during some non-normal uses such as maintenance, debugging, abnormal running
When, the traction medium of elevator can equally bend, and bending number of times during by abnormal running is same when using with normal operation
Cumulative mode, it is possible to increase the traction medium life-span monitoring precision.
Be convenience of calculation, it is generally the case that with car be located at top layer when as initial position, take cage side fag end as rise
Point.
The absolute position of the active wheel refers to：Elevator traction medium is stretched to a straight line, active wheel present position with
The distance of starting point.
When car is at a certain height, each active wheel corresponds to an absolute position, correspondingly, each active wheel respectively
There are corresponding absolute position varied sections when elevator runs.
In running process of elevator, the stress traction element inside traction medium continuously bends, in the running of elevator
In, the bending number of times of each point of traction medium is different, the method provided using the present invention, can comprehensively react traction medium
Bending situation, even if stroke is larger, a certain unit of traction medium simultaneously by crosshead sheave and traction sheave when, it is also possible to it is accurate
Metering bending number of times.
When car completes once to run, there is flat bed twice in homeposition (or floor) and destination locations (or floor),
The distance between homeposition (or floor) and destination locations (or floor) are calculated, and according to homeposition (or floor) and purpose
The distance between position (or floor) calculates absolute position varied sections.
For example, the distance of starting layer and target zone is D, according to the difference of active wheel position, absolute position varied sections
Size is the integral multiple of D, the appearance bending of the traction medium in the varied sections of absolute position.
The operation of car is divided into uplink and downlink, and when up or descending, absolute position varied sections do positive and negative differentiation,
Such as active wheel A initial absolute position is La0, when the downward range ability of elevator is D, the corresponding absolute positions of active wheel A are
La0+ D, absolute position varied sections are the L on traction mediuma0~La0+ D sections, the L on traction mediuma0~La0+ D sections there occurs
Bending；When elevator runs up distance for D, the corresponding absolute positions of active wheel A are La0- D, absolute position varied sections are traction
L on mediuma0- D~La0Section, the L on traction mediuma0- D~La0Section there occurs bending.
Preferably, elevator traction medium is divided into some unit lengths, absolute position conversion section is projected into list
On bit length, the bending number of times to traction medium in unit length adds up.
In a running process of elevator, the accumulation calculating process for illustrating bending number of times is as follows：
Under original state：The corresponding absolute positions of active wheel A are La0, the corresponding absolute positions of active wheel B are Lb0；Elevator
When downward range ability is D, the corresponding absolute positions of active wheel A are La0The corresponding absolute position of+D, active wheel B is Lb0+D；Work
The absolute position varied sections for making wheel A are the L on traction mediuma0~La0+ D sections, the absolute position varied sections of active wheel B are
L on traction mediumb0~Lb0+ D sections.
The absolute position varied sections of the absolute position varied sections of active wheel A and active wheel B are projected into traction medium
Some unit lengths on, if the absolute position varied sections of active wheel A are not weighed with the absolute position varied sections of active wheel B
Folded, then it is 1 time to project to the bending number of times in the unit length of traction medium；
If the absolute position varied sections of active wheel A have overlap with the absolute position varied sections of active wheel B, overlay region
In domain, it is 2 times to project to the bending number of times in the unit length of traction medium；The other unit length for removing overlapping region is draged
The bending number of times for drawing medium is 1 time.
Preferably, meeting following either condition, elevator traction medium is pointed out to reach the condition of scrapping：
A, elevator traction Media Usage life-span reach natural life-span；
Maximum bending number of times in b, elevator traction medium any unit length reaches capacity bending number of times.
The real-time bending number of times of each unit length on traction medium is real-time monitored, it is cumulative by assignment, can obtain
The maximum bending number of times of certain unit length on arbitrary period traction medium, according to life-span of traction suspension arrangement and set in advance
The limit bends number of times final rejection condition, points out repair and maintenance personnel to be overhauled and changed traction medium, if traction medium is most
Big bending number of times reaches the limit bending number of times for pre-setting, there is provided mandatory failure, points out to need to change traction medium.
For the simplicity for calculating, active wheel only includes traction sheave, crosshead sheave and to roller, by these three active wheels
React the bending situation of traction medium.When limit by row bending time number limiting is entered, it is considered to which other active wheels are curved to traction medium
Folding is acted on, and for example the limit bending number of times to theoretical calculation gives a discount, or the accumulation bending number of times of actual monitoring is multiplied by
Coefficient carries out scaling.
Present invention also offers a kind of system for monitoring the elevator traction medium life-span, including：
Monitoring unit, the bending for monitoring elevator traction medium unit length；
Summing elements, in elevator run time, being carried out respectively to elevator traction medium constituent parts length in real time curved
Folding number of times adds up；
Judging unit, the life-span for weighing elevator traction medium with the bending number of times the maximum that added up in unit length.
The system in the monitoring elevator traction medium life-span need not increase the hardware of any outside, by operating in elevator
Software in control unit is realized, before the traction medium life-span is monitored, the system of typing traction medium in elevator control unit
The date is made, the build date must not be changed in building site, and power down loss will not occur.
Following parameter is at least preset in elevator control unit：The length of a, traction medium；It is b, traction sheave, crosshead sheave, right
The corresponding initial absolute position of the active wheels such as roller；C, traction sheave, crosshead sheave, the corresponding absolute position of the active wheels such as roller is become
Change the formula of section；The hoisting depth of d, car；E, car size.
When each elevator runs, the motion amplitude of elevator is automatically converted to the bending time of traction medium by monitoring unit
Number, and bending number of times is added in the unit length of traction medium, obtain cumulative curved in arbitrary period arbitrary unit length
The cumulative bending number of times of maximum on folding number of times, and all unit lengths of arbitrary period.
Preferably, the monitoring unit includes：
Absolute position computing module, for taking any point on elevator traction medium as starting point, with elevator traction medium
The distance of upper active wheel present position and starting point as corresponding active wheel absolute position；
Varied sections computing module, for normally being run or during abnormal running in elevator, detects the position of setting out of active wheel
The distance with destination locations is put, absolute position variation zone is drawn according to the distance between homeposition and destination locations change calculations
Section, the traction medium in the varied sections of absolute position bends.The summing elements include：
Unit length division module, for elevator traction medium to be divided into some unit lengths；
Projection module, for absolute position conversion section to be projected into unit length；
Accumulator module, adds up for the bending number of times to traction medium in unit length.
Preferably, also including scrapping monitoring unit, following either condition is met, point out elevator traction medium to reach and scrap
Condition：
A, elevator traction Media Usage life-span reach natural life-span；
Maximum bending number of times in b, elevator traction medium any unit length reaches capacity bending number of times.
The method and system in the monitoring elevator traction medium life-span that the present invention is provided, can avoid traction suspension arrangement week long
Phase postrun failure, once reaching life expectancy, need to force to scrap traction suspension arrangement, it is ensured that the safety of elevator device.
Brief description of the drawings
Fig. 1 a, 1b are the schematic diagram of elevator device in embodiment 1；
Fig. 2 a, 2b are for when elevator traction medium launches linear state in embodiment 1, the corresponding absolute position of active wheel shows
It is intended to；
Fig. 3 is the relation schematic diagram of each active wheel absolute position and floor when elevator device runs in embodiment 1；
Fig. 4 is the system composition schematic diagram in the monitoring elevator traction medium life-span of embodiment 2；
Fig. 5 is the flow chart for monitoring elevator traction medium life approach.
In figure：1st, crosshead sheave；2nd, traction sheave；3rd, to roller；4th, car；5th, counterweight.
Specific embodiment
Below in conjunction with the accompanying drawings, the method and system to the present invention monitoring elevator traction medium life-span are described in detail.
Embodiment 1
It is 2 with wiring ratio：As a example by 1 elevator traction suspension, as shown in Figure 1a, elevator traction suspension includes：
Car 4, counterweight 5, traction main frame and traction medium, the top of car 4 are fixed with crosshead sheave 1, and it is right that the top of counterweight 5 is fixed with
Roller 3, the two ends of traction medium are fixed with hoistway top respectively, and traction medium is bypassed to roller 3, traction sheave 2 and sedan-chair successively
Top wheel 1.
The flow of the method in the present embodiment monitoring elevator traction medium life-span is as shown in figure 5, circular is described such as
Under.
As shown in Figure 1a, as initial position when being located at top layer with car 4, the side fag end of car 4 is taken as starting point O, elevator is draged
Draw suspension parameters determine after, crosshead sheave 1, traction sheave 2 and roller 3 is also determined therewith with the distance of starting point,
When moving down occurs in car 4, as shown in Figure 1 b, crosshead sheave 1, traction sheave 2 and the position to the relative starting point of roller 3 can accordingly change
Become.
In Fig. 1 a, as initial position when being located at top layer with car 4, the distance of traction sheave 2 and starting point is L2, to roller 3 with
The distance of starting point is L3, and crosshead sheave 1 is L1 with the distance of starting point, and for the simplicity of description, the present embodiment chooses two crosshead sheaves
Centre position as the residing point on traction medium of crosshead sheave 1.
More intuitively as shown in Fig. 2 a, 2b, traction medium is launched in a straight line, when elevator off-position is in along its length
During beginning position, position c, b, a on traction medium are corresponded to respectively to roller 3, traction sheave 2 and crosshead sheave 1, take the side of car 4 rope
Used as starting point O, as initial position when being located at top layer with car 4, crosshead sheave 1 and the distance of starting point O are L1 to head, traction sheave 2 with rise
The distance of point O is L2, and the distance to roller 3 and starting point O is L3.
As shown in Figure 2 b, when moving down occurs in car 4, and the distance for moving down is when being D, then crosshead sheave 1 and starting point O away from
From L1+D is changed into, traction sheave 2 is L2+2*D with the distance of starting point O, and the distance to roller 3 and starting point O is L3+D.
As shown in Figure 2 a, car 4 has been in top layer, and L1 sections will not bend, when car 4 occurs moving down and distance is D
When, that is, show that L1~L1+D sections of traction medium there occurs bending around crosshead sheave 1, similarly L2+2*D sections and L3+D sections of traction
Medium also bends.
Traction medium is divided into some unit lengths, L1~L1+D sections of traction medium is projected into constituent parts length
On, the bending number of times in the unit for projecting on degree increases by 1 time, similarly, L2+2*D sections and L3+D sections of traction medium projection
Onto constituent parts length, the bending number of times in the unit for projecting on degree increases by 1 time.
, for the simplicity of description, two centre positions of crosshead sheave of selection are as crosshead sheave on traction medium for the present embodiment
Residing point, in actual mechanical process, the need for accurately calculating, it is also possible to by each crosshead sheave respectively in traction medium
It is upper it is abstract be calculating that a point bend number of times.
As shown in figure 3, ordinate is floor number, abscissa projects to the seat on traction medium for the position of active wheel
Mark, wherein, the corresponding round dots of D1~D10 are represented to roller, and the corresponding round dots of Z1~Z10 represent traction sheave, and J1~J10 is corresponding
Round dot represents crosshead sheave, for example, when elevator is when 1 building goes upward to 8 buildings, the absolute position varied sections to roller are D8-D1, are draged
The absolute position varied sections of running wheel are Z8-Z1, and the absolute position varied sections of crosshead sheave are J8-J1, by the exhausted of each active wheel
Position varied sections are projected in the unit length of traction medium respectively, for example, throwing the absolute change section D8-D1 of roller
Shadow to being in the unit length of traction medium：Region between D8 and the abscissa of D1, the area between D8 and the abscissa of D1
Domain, bending number of times is 1 time；Similarly,
The absolute change section Z8-Z1 of traction sheave is projected in the unit length of traction medium and is：The abscissa of Z8 and Z1
Between region, the region between Z8 and the abscissa of Z1, bending number of times be 1 time；
The absolute change section J8-J1 of crosshead sheave is projected in the unit length of traction medium and is：The abscissa of J8 and J1
Between region, the region between J8 and the abscissa of J1, bending number of times be 1 time.
The distance moved or move down in elevator actual moving process, on car can be by the position that is arranged in hoistway
Sensor accurate measurement, position sensor can be using the magnetic stripe and magnetic switch for cooperating, or optoelectronic switch.
During elevator actual motion, with uplink and downlink both direction, for different moving directions, absolute position is being set
Should be distinguished by when putting varied sections computing formula.
The computational methods provided using the present invention, even stroke is larger, suspension medium passes through crosshead sheave and traction simultaneously
Wheel, it is also possible to avoid bending number of times from adding up and mistake occur.
If running into elevator faults, when performing inspection travel or returning the instruction such as pedestal, bending times no longer add up, but pair event
Barrier operations number is added up, and weighted accumulation is to cumulative bending number of times, to reserve safe clearance.
When the cumulative bending number of times in any unit length reaches capacity bending number of times, life time failures warning is carried out, carried
The user that wakes up changes traction medium, only changes after traction medium, and elevator device can remove failure, it is ensured that what elevator was used
Security.
Before elevator reaches capacity bending number of times, multistage prompt message can be set, for example, reach 0.8 times of limit bending
During number of times, early warning is carried out, point out concern and safeguard the use state of traction medium.
Embodiment 2
As shown in figure 4, a kind of system for monitoring the elevator traction medium life-span, including：
Monitoring unit, the bending for monitoring elevator traction medium unit length；
Summing elements, in elevator run time, being carried out respectively to elevator traction medium constituent parts length in real time curved
Folding number of times adds up；
Judging unit, the life-span for weighing elevator traction medium with the bending number of times the maximum that added up in unit length；
Monitoring unit is scrapped, points out elevator traction medium to reach the condition of scrapping：
A, elevator traction Media Usage life-span reach natural life-span；
Maximum bending number of times in b, elevator traction medium any unit length reaches capacity bending number of times.
Monitoring unit includes：
Absolute position computing module, for taking any point on elevator traction medium as starting point, with elevator traction medium
The distance of upper active wheel present position and starting point as corresponding active wheel absolute position；
Varied sections computing module, for normally being run or during abnormal running in elevator, detects the position of setting out of active wheel
The distance with destination locations is put, absolute position variation zone is drawn according to the distance between homeposition and destination locations change calculations
Section, the traction medium in the varied sections of absolute position bends.
Summing elements include：
Unit length division module, for elevator traction medium to be divided into some unit lengths；
Projection module, for absolute position conversion section to be projected into unit length；
Accumulator module, the bending number of times for traction medium in the unit length to projecting to adds up.
The announcement and teaching of book according to the above description, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula carries out appropriate change and modification.Therefore, the invention is not limited in specific embodiment disclosed and described above, to this
Some modifications and changes of invention should also be as falling into scope of the claims of the invention.Although additionally, this specification
In used some specific terms, but these terms are merely for convenience of description, do not constitute any limitation to the present invention.
Claims (10)
1. it is a kind of monitor the elevator traction medium life-span method, it is characterised in that comprise the following steps：
The bending of elevator traction medium unit length is monitored, in elevator run time, in real time to elevator traction medium constituent parts
Length carries out bending number of times and adds up respectively, and the longevity of elevator traction medium is weighed with the bending number of times the maximum that added up in unit length
Life.
2. the method for monitoring the elevator traction medium life-span as claimed in claim 1, it is characterised in that take on elevator traction medium
Any point as starting point, using elevator traction medium on active wheel present position and starting point distance as the exhausted of corresponding active wheel
To position；
Normally run in elevator or during abnormal running, detect the homeposition of active wheel and the distance of destination locations, according to going out
Hair the distance between position and destination locations change calculations draw absolute position varied sections, draging in the varied sections of absolute position
Draw medium to bend.
3. the method for monitoring the elevator traction medium life-span as claimed in claim 2, it is characterised in that draw elevator traction medium
Be divided into some unit lengths, by absolute position conversion section project in unit length, in unit length traction medium it is curved
Folding number of times is added up.
4. the method for monitoring the elevator traction medium life-span as claimed in claim 2, it is characterised in that the active wheel is at least wrapped
Include the driving main frame traction sheave of elevator device, crosshead sheave, to roller, computer room directive wheel, hoistway directive wheel.
5. as described in any one of Claims 1 to 4 monitoring the elevator traction medium life-span method, it is characterised in that meet with
Lower either condition, points out elevator traction medium to reach the condition of scrapping：
A, elevator traction Media Usage life-span reach natural life-span；
Maximum bending number of times in b, elevator traction medium any unit length reaches capacity bending number of times.
6. it is a kind of monitor the elevator traction medium life-span system, it is characterised in that including：
Monitoring unit, the bending for monitoring elevator traction medium unit length；
Summing elements, in elevator run time, carrying out bending time respectively to elevator traction medium constituent parts length in real time
Number is cumulative；
Judging unit, the life-span for weighing elevator traction medium with the bending number of times the maximum that added up in unit length.
7. the system for monitoring the elevator traction medium life-span as claimed in claim 6, it is characterised in that the monitoring unit bag
Include：
Absolute position computing module, for taking any point on elevator traction medium as starting point, with work on elevator traction medium
Make the distance of wheel present position and starting point as the absolute position of corresponding active wheel；
Varied sections computing module, for normally being run or during abnormal running in elevator, detect active wheel homeposition and
The distance of destination locations, absolute position varied sections are drawn according to the distance between homeposition and destination locations change calculations,
Traction medium in the varied sections of absolute position bends.
8. the system for monitoring the elevator traction medium life-span as claimed in claim 6, it is characterised in that the summing elements bag
Include：
Unit length division module, for elevator traction medium to be divided into some unit lengths；
Projection module, for absolute position conversion section to be projected into unit length；
Accumulator module, adds up for the bending number of times to traction medium in unit length.
9. the system for monitoring the elevator traction medium life-span as claimed in claim 7, it is characterised in that the active wheel is at least wrapped
Include the driving main frame traction sheave of elevator device, crosshead sheave, to roller, computer room directive wheel, hoistway directive wheel.
10. the system for monitoring the elevator traction medium life-span as claimed in claim 6, it is characterised in that also including scrapping monitoring
Unit, meets following either condition, points out elevator traction medium to reach the condition of scrapping：
A, elevator traction Media Usage life-span reach natural life-span；
Maximum bending number of times in b, elevator traction medium any unit length reaches capacity bending number of times.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109665411A (en) * | 2017-10-11 | 2019-04-23 | 上海峰景移动科技有限公司 | A kind of elevator detection system of steel rope fault broken skin |
| CN110550525A (en) * | 2019-09-17 | 2019-12-10 | 东北大学 | elevator safety detection method based on bending times of elevator steel wire rope |
| CN112158696A (en) * | 2020-09-29 | 2021-01-01 | 中国人民解放军国防科技大学 | Method for judging elevator strain degree |
| CN115684197A (en) * | 2022-07-14 | 2023-02-03 | 荣耀终端有限公司 | Test method of folding screen, electronic equipment and device |
| WO2024056933A1 (en) * | 2022-09-13 | 2024-03-21 | Kone Corporation | Method and elevator arrangement |
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| US20030111298A1 (en) * | 2001-12-19 | 2003-06-19 | Logan Douglas E. | Load bearing member for use in an elevator system having external markings for indicating a condition of the assembly |
| CN101668692A (en) * | 2007-05-11 | 2010-03-10 | 奥蒂斯电梯公司 | Elevator load bearing assembly having an initial factor of safety based upon a desired life of service |
| CN101362570A (en) * | 2007-08-10 | 2009-02-11 | 东芝电梯株式会社 | Elevator cable diagnostic system |
| CN102099279A (en) * | 2008-07-18 | 2011-06-15 | 因温特奥股份公司 | Method and device for determining the degree of service life use of a carrying means of an elevator |
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| CN110550525A (en) * | 2019-09-17 | 2019-12-10 | 东北大学 | elevator safety detection method based on bending times of elevator steel wire rope |
| CN110550525B (en) * | 2019-09-17 | 2020-11-03 | 东北大学 | Elevator safety detection method based on bending times of elevator steel wire rope |
| CN112158696A (en) * | 2020-09-29 | 2021-01-01 | 中国人民解放军国防科技大学 | Method for judging elevator strain degree |
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