CN109230952A - Elevator traction steel band tension and performance degradation monitoring method and system - Google Patents
Elevator traction steel band tension and performance degradation monitoring method and system Download PDFInfo
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- CN109230952A CN109230952A CN201811158274.8A CN201811158274A CN109230952A CN 109230952 A CN109230952 A CN 109230952A CN 201811158274 A CN201811158274 A CN 201811158274A CN 109230952 A CN109230952 A CN 109230952A
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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
- B66B7/1223—Checking means specially adapted for ropes or cables by analysing electric variables
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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
- B66B5/0037—Performance analysers
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The present invention provides a kind of elevator traction steel band tension and performance degradation monitoring method and system, belongs to Elevator Monitoring field.Monitoring method of the present invention includes injecting specific currents to the Steel cord of every steel band, and detect the voltage value of the Steel cord of each steel band；Next cycle on elevator is run for the first time, calculates and record the Steel cord initial characteristic values of each steel band of elevator original state；When elevator is run, the whole data in set period of time are acquired, and calculate characteristic value and the preservation of the Steel cord of each steel band；Judge whether the Steel cord of each steel band of elevator tension imbalance or steel band performance degradation problem occurs according to characteristic value.The invention has the benefit that the wire rope core of all steel bands can be monitored simultaneously；The variable quantity and variation tendency of each steel band tension can accurately be detected；The unevenness and performance degradation trend of each steel band tension of real-time monitoring.
Description
Technical field
The present invention relates to a kind of Elevator Monitoring methods more particularly to a kind of elevator traction steel band tension and performance degradation to monitor
Method and system.
Background technique
The Steel cord that elevator traction steel band is mainly arranged in parallel by several is applied with high molecular material and merges.It is real
Steel cord carries most load on steel band when border works.In elevator operation, once the Steel cord in steel band
It is damaged, the tension intensity of elevator traction steel band can decline, and influence the safe handling of elevator traction steel band.When the tension of steel band
When there is uneven or performance degradation, it cannot judge and handle in time, influence the service life of elevator all parts, it can be direct
Influence the safe operation of elevator.
The country there is no unified elevator traction steel band test stone and method at present, and current standard specifications are mainly for traction
Wirerope elevator." 2009 elevator surveillance of TSGT7001-is examined and periodic inspection is regular --- traction and forcibly driving elevator "
Allow using other types suspension arrangement (such as: traction steel band).The clear clause for traction steel band examination requirements is had no at present,
We can refer to the examination requirements in Specification to wirerope." GB/T10060-2011 elevator code for erection and inspection ":
The tension force mean value of any hoist ropes or chain is no more than 5%." GB50310-2016 elevator engineering construction quality accident rule
Model ": every steel wire rope tension and mean deviation should not exceed 5%.Have in existing patent and document for wirerope in steel band
The detection of core, but all it is unable to judge accurately the tension variation and performance degradation trend of steel band.A kind of patent " monitoring elevator load
The method and device of the situation of component " it is to detect its resistance by applying Steel cord of the electric signal into steel band and determine steel wire
The situation of wire rope core, the method cannot differentiate the tension imbalance and performance degradation trend of each steel band, can not accomplish accurate safety
Monitoring and anticipation steel band service life.Patent " the disconnected rope detection method of elevator traction steel band and detection device " is by applying first electricity
Signal is pressed, final voltage signal is detected, judges whether Steel cord normally connects in steel band, and the method can only judge that Steel cord is
No fracture, the method cannot differentiate the tension imbalance and performance degradation trend of each steel band, can not accomplish accurate safety monitoring
With anticipation steel band service life.Mainly have the uniformity coefficient measurement method of traditional elevator traction steel-cable tension with lower section
Method: (1) carrying out conjunction measuring by tensiometer and straight steel ruler, first run lift car to upper 2/3rds of stroke,
Testing staff measures tension value when each wirerope is pulled same distance in elevator car top, with tensiometer respectively.It is this
Because of operating difficulties, not only measurement accuracy not can guarantee method, can only detect the tension value of wirerope part, and need elevator
It stops working, efficiency is very low, and it is even more impossible to realize real-time monitoring；(2) " DGZ elevator wire rope even tension degree tester is ground document
System and application " it is the uniformity coefficient measurement for being directed to traditional elevator traction steel-cable tension, basic principle is by wirerope
The analysis of deformation characteristics after radial force, derives the relational model of radial force and longitudinal force, and the method first can not be applied to
The tension of steel band detects, and can only detect the tension value of wirerope part, can not detect the tension variation of whole wirerope；
(3) patent " tester for analyzing stress uniformity when elevator dragging steel rope " is also for the equal of traditional elevator traction steel-cable tension
Even degree measurement, the instrument are the vibration periods for acquiring each wirerope respectively using photoelectric probe, will be converted to the vibration period
Vibration frequency, then calculate by the functional relation of the frequency and tension the percent strain value of each wirerope.The test side
Method is not used to the tension detection of steel band, and the functional relation of the method cannot be general to different traction steel-cables.
Summary of the invention
To solve the problems of the prior art, the present invention provides a kind of elevator traction steel band tension and performance degradation monitoring side
Method also provides a kind of system for realizing the monitoring method.
The method of the present invention includes the following steps:
S1: specific currents I is injected to the Steel cord of every steel band, and detects the voltage value of the Steel cord of each steel band
U；
S2: next cycle on elevator is run for the first time, calculates and record the Steel cord of each steel band of elevator original state
Initial characteristic values；
S3: when elevator is run, the whole data in set period of time are acquired, and calculate the spy of the Steel cord of each steel band
Value indicative simultaneously saves；
S4: judge whether the Steel cord of each steel band of elevator tension imbalance occurs or steel band performance is moved back according to characteristic value
Change problem.
The present invention is further improved, and further includes step S5: each characteristic value and initial characteristic values being compared, according to right
Than result and variation tendency, the service life of each steel band is assessed.
The present invention is further improved, and in step s 2, setting elevator runs initial floor, and a cycle is elevator from first
Beginning layer arrives the bottom to top again, then returns initiation layer, and the initial characteristic values include each steel band of initiation layer
The resistance value r of Steel cord0, undulating value vpp when operation0, variance S0 2, standard deviation S0And the covariance of the data of each steel band
Matrix V0。
The present invention is further improved, and in step s3, the characteristic value includes: initiation layer resistance r, when operation
Undulating value vpp, variance S2, the covariance matrix V of standard deviation S and each radical evidence.
The present invention is further improved, in step s 4, the evaluation method of steel band tension imbalance are as follows:
In this period, the undulating value of certain root steel band resistance is much larger than or is less than other steel bands, then this root steel band exists
With the problem of other steel band tension unevenness, i.e.,OrM root steel band exists and other steel
Problem with tension unevenness, vppmRefer to the undulating value of m root steel band resistance,Refer to other all steel band electricity in addition to m root steel band
Hinder the average value of undulating value, a1、a2Refer to the threshold value of setting, m root steel band there is a problem of and other steel band tension unevenness；
In this period, the growth trend of each steel band resistance value, the growth trend of certain root steel band and other steel bands are compared
Inconsistent, then this root steel band there is a problem of and other steel bands tension are uneven, i.e.,Rm' refer to m root steel band electricity
The change rate of resistance,Refer to the average value of other all steel band resistance change rates except m root steel band,Refer to m root steel
The reduced value of strip resistance growth trend and other steel bands, a3Refer to the threshold value of setting, m root steel band exists with other steel band tension not
Equal problem；
In this period, when certain root steel band resistance value elevator run when do not fluctuate, then this root steel band exist and other
The problem of steel band tension unevenness, i.e. vppm<a4, vppmRefer to the undulating value of m root steel band resistance, a4Refer to the threshold value of setting, m root
Steel band there is a problem of and other steel band tension unevenness.
The present invention is further improved, the evaluation method of steel band performance degradation are as follows:
The different characteristic value variation tendency follow regularity of same root steel band, when the variation of some characteristic value of certain root steel band becomes
Gesture suddenly change, then there is performance degradation problem in this root steel band, i.e., ought meet g1(rm) > b1、g2(vppm) > b2And g3(Sm) >
b3When these three one of conditions, there is performance degradation problem in m root steel band, needs to monitor the steel band characteristic, wherein b1、
b2、b3For the threshold value of setting, rmFor the initiation layer resistance of m root steel band, vppmFor the undulating value of m root steel band resistance, Sm
For the standard deviation of m root steel band resistance, g1(rm)、g2(vppm)、g3(Sm) be respectively steel band operation when resistance value, undulating value,
The variation tendency of standard deviation；
According to covariance matrixWhen certain root steel band parameter suddenly change, then there is performance in this root steel band
Degenerate problem, n refer to steel band number in total, vijFor i-th and the covariance value of jth root steel band resistance, as h (vi1,…,vin) > b4When,
There is performance degradation problem in i-th steel band, needs to monitor the steel band characteristic, wherein b4For the threshold value of setting, h (vi1,…,vin)
For the average value of i-th steel band resistance and other steel band resistance covariances；
Compare the variation tendency of the same characteristic features value of each steel band, the variation of the data of certain root steel band compared to other steel bands
Trend is inconsistent, then performance degradation problem occurs in this root steel band, that is, works as satisfactionWithWhen these three one of conditions, there is performance degradation problem in m root steel band, needs to monitor steel band spy
Property, wherein c1、c2、c3For the threshold value of setting, rmFor the initiation layer resistance of m root steel band,For in addition to m root steel band its
The average value of its all steel band initiation layer resistance, vppmFor the undulating value of m root steel band resistance,For except m root steel
Average value with outer other all steel band resistance fluctuation values, vppmFor the undulating value of m root steel band resistance, SmFor m root steel band electricity
The standard deviation of resistance,For the average value of all steel band resistance standard differences other in addition to m root steel band,For m root
The reduced value of steel band initiation layer resistance growth trend and other steel bands,For m root steel band steel band electricity
The reduced value of undulating value growth trend and other steel bands is hindered,Become for the increase and decrease of m root steel band steel band resistance standard difference
The reduced value of gesture and other steel bands.
The present invention is further improved, and several Steel cords, the elevator traction steel band tension and property are equipped in steel band
The monitoring method that can degenerate and system further include single steel band detecting step: all being injected to every Steel cord in single steel band specific
Electric current, and the voltage value of each Steel cord in the root steel band is detected, then using step S2-S4 to every wirerope in steel band
Core carries out implementation monitoring.
The present invention also provides a kind of systems for realizing the elevator traction steel band tension and performance degradation monitoring method, including
Specific currents occurring source, voltage detection module, memory module, data processing module, wherein the specific currents occurring source includes
Several groups periodic current source, is connected with the Steel cord of each steel band respectively；The voltage detection module is for acquiring each
The Steel cord voltage of steel band, and detect according to the specific currents of acquisition the resistance of the Steel cord of each root steel band；At data
The data that reason module receives voltage detection module simultaneously calculate characteristic value, are stored in memory module, and determine each steel band and each
Whether the Steel cord of root steel band is normal.
The present invention is further improved, and the data processing module further includes service life assessment unit, is used for each spy
Value indicative and initial characteristic values compare, and according to comparing result and variation tendency, assess the service life of each steel band.
The present invention is further improved, and further includes warning device, and the warning device is connected with data processing module.
The present invention is further improved, further include display module for showing each steel band state and with elevator master control list
Member communication, uploads the communication module of each steel band data of elevator.
The present invention is further improved, and when the performance for monitoring in single steel band each Steel cord and assesses its service life
When, the specific currents occurring source of this example further includes the week that several groups are connected with each Steel cord in every steel band respectively
Phase property current source；The voltage detection module is also used to acquire each Steel cord voltage in every steel band, and according to acquisition
Specific currents detect the resistance of each Steel cord.
Compared with prior art, the beneficial effects of the present invention are: all steel wire ropes of all steel bands can be monitored simultaneously
Core；The variable quantity and variation tendency of each steel band tension can accurately be detected；The unevenness of each steel band tension of real-time monitoring
With performance degradation trend.
Detailed description of the invention
Fig. 1 is the method for the present invention flow chart；
Fig. 2 is that tension imbalance monitors flow diagram；
Fig. 3 is that performance degradation monitors flow diagram；
Fig. 4 is present system structural schematic diagram；
Fig. 5 is the resistance Value Data of No. 1 steel band Steel cord；
Fig. 6 is the resistance Value Data of No. 2 steel band Steel cords；
Fig. 7 is the resistance Value Data of No. 3 steel band Steel cords.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawings and examples.
As shown in Figure 1, monitoring method of the present invention is each of the system real-time detection through the invention after elevator installation
The resistance value of Steel cord in steel band, the tension and performance of steel band with above-mentioned resistance value be it is directly related, it is corresponding by extracting
Characteristic value, and the historical data by comparing each steel band resistance value analyze the variation and performance degradation of each steel band tension
Situation monitors variable quantity, unevenness and the performance degradation trend of tension.Each step is described in detail below.
Step1: specific currents I is injected to the Steel cord of every steel band；This example injects the Steel cord of every steel band
Specific currents I, specific currents are that size of current is arranged according to steel band resistance value, make to detect voltage range in preset voltage range
It is interior, voltage range is such as detected between 0.8V~1.2V, and the resistance value of 9 layers of elevator steel band is about 15 Ω, then electric current is set as
70mA, i.e. detection voltage value are 1.05V.
Step2: after injection specific currents I, the voltage value U of the Steel cord of each steel band is detected；
Step3: according to the voltage value U of detection and specific current value I, the Steel cord resistance value of each at this time steel band is calculated
R。
Step4: this monitoring method is used when first time, elevator initiation layer is set, needs elevator from initiation layer to highest point
The bottom is arrived again and returns to the operation of initiation layer whole process, records whole data, and calculate characteristic value and the preservation of each steel band, the spy
Value indicative includes: the resistance value r of initiation layer0(resistance when elevator stops at initiation layer is calibration value R0), undulating value when operation
vpp0, variance S0 2, standard deviation S0And the covariance matrix V of each radical evidence0；
Step5: set period of time saves each steel band electricity in set period of time when elevator operation stops arriving initiation layer
Data are hindered, the characteristic value and record of each steel band is calculated, judges whether steel band tension imbalance problem occurs.
Certainly, this example can also be detected using 2 kinds of situations of following two:
(1) periodic detection (setting time according to demand), elevator is in service mode at this time, according to from initiation layer to highest
Place arrives the bottom again and returns to the operation of initiation layer whole process, records whole data, and calculate characteristic value and the preservation of each steel band, such as may be used
Detection acquisition data are repaired to set weekly fixed a few minutes；
(2) real-time detection saves each steel band resistance data, calculates each steel band after elevator works a period of time T
Characteristic value simultaneously records, and judges whether steel band tension imbalance problem occurs, wherein working environment and operation of the time T according to elevator
Situation setting, when elevator is in frequent situation about running or working environment is severe, time T is set as the short period, and (such as 3 is small
When), when elevator is in the preferable situation of seldom operation or working environment, Ei long period (such as 8 hours) are arranged in time T.
As shown in Fig. 2, the judge of the tension imbalance of this example follows the steps below:
Step51: the characteristic value and record of each steel band are calculated by each steel band resistance value of this period: when operation
Undulating value vpp, variance S2, the covariance matrix V of standard deviation S and each radical evidence, if elevator operation stops in this period
When to initiation layer, initiation layer resistance r is recorded；
Step52: judge in this period, if the undulating value for certain root steel band resistance occur is much larger than or is less than other
Steel band, if it is, this root steel band there is a problem of and other steel bands tension are uneven, i.e.,OrM root steel band there is a problem of and other steel band tension unevenness, vppmRefer to the fluctuation of m root steel band resistance
Value,Refer to the average value of all steel bands (except m root steel band) resistance fluctuation value, a1、a2Refer to the threshold value of setting, m root steel band
There is a problem of and other steel band tension unevenness；
Step53: in this period, the growth trend of each steel band resistance value is compared, judges whether certain root steel band occur
Growth trend and other steel bands are inconsistent, if it is, this root steel band there is a problem of and other steel bands tension are uneven, i.e.,Rm' refer to the change rate of m root steel band resistance,Refer to all steel bands (except m root steel band) resistance change rate
Average value,Refer to the reduced value of m root steel band resistance growth trend and other steel bands, a3Refer to the threshold value of setting, m
Root steel band there is a problem of and other steel band tension unevenness；
Step54: in this period, if there is certain root steel band resistance value and is not fluctuated in elevator operation, if so,
Then this root steel band there is a problem of and other steel band tension unevenness, i.e. vppm<a4, vppmRefer to the undulating value of m root steel band resistance,
a4Refer to the threshold value of setting, m root steel band there is a problem of and other steel band tension unevenness；
Step55: as elevator working time T again, each steel band resistance data is saved, original data are replaced, repeated
Step51-Step55。
It is noted that step Step51-Step54 can be detected in any order, as long as completing this four detections
?.
Step6: recording the characteristic value of each steel band, and detects each steel band of trend and comparison of each feature, judges steel
Whether band there is performance degradation problem.
As shown in figure 3, the judge of the performance degradation of this example follows the steps below:
Step61: the different characteristic value variation tendency of same root steel band is according to specific rule, when some of certain root steel band is special
The variation tendency suddenly change of value indicative, then there is performance degradation problem in this root steel band, i.e., ought meet g1(rm) > b1、g2(vppm) >
b2And g3(Sm) > b3When these three one of conditions, there is performance degradation problem in m root steel band, needs to monitor steel band spy
Property, wherein b1、b2、b3For the threshold value of setting, rmFor the initiation layer resistance of m root steel band, vppmFor m root steel band resistance
Undulating value, SmFor the standard deviation of m root steel band resistance, g1(rm)、g2(vppm)、g3(Sm) be respectively steel band operation when resistance
Value, undulating value, standard deviation variation tendency；
Step62: according to covariance matrixWhen the parameter suddenly change of certain root steel band, then this root steel
There is performance degradation problem in band, and n refers to steel band number in total, vijFor wherein i-th and the covariance value of jth root steel band resistance, work as h
(vi1,…,vin) > b4When, there is performance degradation problem in i-th steel band, needs to monitor the steel band characteristic, wherein b4For setting
Threshold value, h (vi1,…,vin) be i-th steel band resistance and other steel band resistance covariances average value.
Step63: the variation tendency of the same characteristic features value of each steel band of comparison, the data of certain root are compared to other steel bands
Variation tendency is inconsistent, then performance degradation problem occurs in this root steel band, that is, works as satisfaction
WithWhen these three one of conditions, there is performance degradation problem in m root steel band, needs to monitor steel band spy
Property, wherein c1、c2、c3For the threshold value of setting, rmFor the initiation layer resistance of m root steel band,For all steel band (m roots
Except steel band) average value of initiation layer resistance, vppmFor the undulating value of m root steel band resistance,For all steel bands (
Except m root steel band) average value of steel band resistance fluctuation value, vppmFor the undulating value of m root steel band resistance, SmFor m root steel band electricity
The standard deviation of resistance,For the average value of all steel band resistance standard differences except m root steel band,For m root steel
Reduced value with initiation layer resistance growth trend Yu other steel bands,For m root steel band steel band resistance
The reduced value of undulating value growth trend and other steel bands,Become for the increase and decrease of m root steel band steel band resistance standard difference
The reduced value of gesture and other steel bands.
Equally, the step Step61-Step63 of this example can be detected in any order, as long as completing this three detections i.e.
It can.
Step7: according to each Gent value indicative and initial characteristic values compare and variation tendency, assess making for each steel band
Use the service life.
This method be applicable not only to more steel bands, in more steel bands different wire rope cores monitoring, be equally applicable to one
The monitoring of different wire rope cores in root steel band.
Present invention is generally directed in elevator use process, because of the change of each traction steel band bearing capacity caused by many factors,
The tension variation trend and performance degradation of each steel band of real-time monitoring, it is ensured that elevator safety operation.By real-time monitoring system, when
When each steel band tension imbalance or steel band tension suddenly change and performance degradation, the steel band is monitored in time.When
When phenomenon is scrapped in appearance, stops elevator in time and work and alarm, elevator mainte-nance personnel can accurately repair elevator, exclude peace
Full hidden danger.When guaranteeing elevator safety, resource is maximally utilized, and for staff's maintenance, maintenance elevator and commented
Estimate its service life and important foundation is provided.
The present invention also provides a kind of systems for realizing the elevator traction steel band tension and performance degradation monitoring method, including
Specific currents occurring source, voltage detection module, memory module, data processing module, wherein the specific currents occurring source includes
Several groups periodic current source, is connected with the Steel cord of each steel band respectively；The voltage detection module is for acquiring each
The Steel cord voltage of steel band, and detect according to the specific currents of acquisition the resistance of the Steel cord of each root steel band；At data
The data that reason module receives voltage detection module simultaneously calculate characteristic value, are stored in memory module, and determine each steel band and each
Whether the Steel cord of root steel band is normal.Preferably, the data processing module further includes service life assessment unit, and being used for will
Each characteristic value and initial characteristic values compare, and according to comparing result and variation tendency, assess the service life of each steel band.
This example further includes warning device, and the warning device is connected with data processing module.It further include for showing each
It the display module of steel band state and is communicated with elevator main control unit, uploads the communication module of each steel band data of elevator.
As shown in figure 4,4 one end of elevator traction steel band of this example is fixed by fixed structure 1, the other end connects specific currents
Occurring source and voltage detection module 2, specific currents occurring source and voltage detection module are connected with data processing equipment 3.
Wherein, the specific currents occurring source includes the accurate periodic current source of multiple groups, is injected into the steel wire of each steel band
Wire rope core；Voltage detection module includes multiple groups collection voltages signal circuit, for acquiring the voltage of each steel band Steel cord, and root
The resistance of each steel band Steel cord is detected according to voltage and specific current value.
Processing software, integrated data processing module, display module, report on hardware are equipped with inside the data processing equipment 3
Alarm device and communication module.The memory module of this example can install individual memory cells in data processing equipment, can also be by data
Upload storage in elevator main control unit or elevator operation detection system；In addition, the alarm unit of this example can also directly connect
Enter elevator main control unit, when steel band when something goes wrong, stop elevator work.
As illustrated in figs. 5-7, at work for a certain elevator, the resistance Value Data of 1-3 steel band Steel cord, wherein vertical
Coordinate is resistance value, and abscissa is detection time.When elevator during the work time, the resistance value of 3 steel band Steel cords is trembled
Dynamic, when elevator stops at a certain layer, resistance is in certain value.As shown in Figure 6 and Figure 7, the shake of No. 2 steel bands and No. 3 steel bands
Trend is consistent, and No. 1 steel band and 2, No. 3 steel bands are inconsistent in Fig. 5, illustrates that No. 1 steel band is problematic.This example acquires each steel every 1S
The resistance value of band, wherein the resistance value of No. 1 steel band is [15.795,15.795 ..., 15.798,15.798], as shown in figure 5,2
The resistance value of number steel band is [15.612,15.611 ..., 15.612,15.612], as shown in fig. 6, the resistance value of No. 3 steel bands is
[15.374,15.374 ..., 15.379,15.379], as shown in fig. 7, No. 1 steel band resistance value is assisted with No. 2 steel band resistance values
Variance calculating f (1,2)=- 0.0106, No. 2 steel band resistance values and No. 3 steel band resistance values progress covariances calculating f (2,3)=
0.0551, No. 1 steel band resistance value carries out covariance with No. 3 steel band resistance values and calculates f (1,3)=- 0.0117, according to the present invention
Step62, No. 1 steel band and 2, No. 3 steel band relationships are negative values, so trend is different, No. 1 steel band exists and other steel band tension
Uneven and performance degradation problem.Certainly, the time interval for acquiring data can be arranged according to demand, and interval time is shorter, meter
The result calculated is more accurate.
The invention has the following advantages:
1) wire rope core of all steel bands can be monitored simultaneously using this monitoring method and system；
2) variable quantity of each steel band tension can be accurately detected using this monitoring method and system；
3) it is capable of the variation tendency of each steel band tension of real-time monitoring using this monitoring method and system；
4) it is capable of the unevenness of each steel band tension of real-time monitoring using this monitoring method and system；
5) it is capable of the performance degradation trend of each steel band of real-time monitoring using this monitoring method and system；
6) service life of steel band can be prejudged using this monitoring method and system；
7) using this monitoring method and system on the basis of guaranteeing measurement accuracy, convenience of calculation.
The specific embodiment of the above is better embodiment of the invention, is not limited with this of the invention specific
Practical range, the scope of the present invention includes being not limited to present embodiment, all equal according to equivalence changes made by the present invention
Within the scope of the present invention.
Claims (10)
1. elevator traction steel band tension and performance degradation monitoring method, it is characterised in that include the following steps:
S1: specific currents I is injected to the Steel cord of every steel band, and detects the voltage value U of the Steel cord of each steel band；
S2: next cycle on elevator is run for the first time, calculates and the Steel cord for recording each steel band of elevator original state is initial
Characteristic value；
S3: when elevator is run, the whole data in set period of time are acquired, and calculate the characteristic value of the Steel cord of each steel band
And it saves；
S4: judge whether the Steel cord of each steel band of elevator tension imbalance occurs or steel band performance degradation is asked according to characteristic value
Topic.
2. elevator traction steel band tension according to claim 1 and performance degradation monitoring method, it is characterised in that: further include
Step S5: each characteristic value and initial characteristic values are compared, and according to comparing result and variation tendency, assess making for each steel band
Use the service life.
3. elevator traction steel band tension according to claim 1 or 2 and performance degradation monitoring method, it is characterised in that:
In step S2, setting elevator runs initial floor, a cycle be elevator from initiation layer to top again to the bottom, then again
Initiation layer is returned to, the initial characteristic values include the resistance value r of the Steel cord of each steel band of initiation layer0, wave when operation
Dynamic value vpp0, variance S0 2, standard deviation S0And the covariance matrix V of the data of each steel band0。
4. elevator traction steel band tension according to claim 3 and performance degradation monitoring method, it is characterised in that: in step
In S3, the characteristic value includes: initiation layer resistance r, undulating value vpp, variance S when operation2, standard deviation S and each radical
According to covariance matrix V.
5. elevator traction steel band tension according to claim 3 and performance degradation monitoring method, it is characterised in that: in step
In S4, the evaluation method of steel band tension imbalance are as follows:
In this period, the undulating value of certain root steel band resistance be much larger than or be less than other steel bands, then this root steel band exist and its
The problem of his steel band tension unevenness, i.e.,OrM root steel band exists and other steel bands
The problem of power unevenness, vppmRefer to the undulating value of m root steel band resistance,Refer to other all steel band resistance waves in addition to m root steel band
The average value of dynamic value, a1、a2Refer to the threshold value of setting, m root steel band there is a problem of and other steel band tension unevenness；
In this period, the growth trend of each steel band resistance value is compared, the growth trend of certain root steel band and other steel bands are different
It causes, then this root steel band there is a problem of and other steel bands tension unevenness, i.e.,Rm' refer to m root steel band resistance
Change rate,Refer to the average value of other all steel band resistance change rates except m root steel band,Refer to m root steel band electricity
Hinder the reduced value of growth trend and other steel bands, a3Refer to the threshold value of setting, m root steel band exists and other steel band tension unevenness
Problem；
In this period, when certain root steel band resistance value is not fluctuated when elevator is run, then this root steel band exists and other steel bands
The problem of tension unevenness, i.e. vppm<a4, vppmRefer to the undulating value of m root steel band resistance, a4Refer to the threshold value of setting, m root steel band
There is a problem of and other steel band tension unevenness.
6. elevator traction steel band tension according to claim 3 and performance degradation monitoring method, it is characterised in that: steel band
The evaluation method that can be degenerated are as follows:
The different characteristic value variation tendency follow regularity of same root steel band, when the variation tendency of some characteristic value of certain root steel band is prominent
So variation, then there is performance degradation problem in this root steel band, i.e., ought meet g1(rm) > b1、g2(vppm) > b2And g3(Sm) > b3This
When three one of conditions, there is performance degradation problem in m root steel band, needs to monitor the steel band characteristic, wherein b1、b2、b3
For the threshold value of setting, rmFor the initiation layer resistance of m root steel band, vppmFor the undulating value of m root steel band resistance, SmFor m
The standard deviation of root steel band resistance, g1(rm)、g2(vppm)、g3(Sm) be respectively steel band operation when resistance value, undulating value, standard deviation
Variation tendency；
According to covariance matrixWhen certain root steel band parameter suddenly change, then there is performance degradation in this root steel band
Problem, n refer to steel band number in total, vijFor i-th and the covariance value of jth root steel band resistance, as h (vi1,…,vin) > b4When, i-th
There is performance degradation problem in root steel band, needs to monitor the steel band characteristic, wherein b4For the threshold value of setting, h (vi1,…,vin) it is the
The average value of i root steel band resistance and other steel band resistance covariances；
Compare the variation tendency of the same characteristic features value of each steel band, the variation tendency of the data of certain root steel band compared to other steel bands
Inconsistent, then there is performance degradation problem in this root steel band, that is, works as satisfactionWithWhen these three one of conditions, there is performance degradation problem in m root steel band, needs to monitor steel band spy
Property, wherein c1、c2、c3For the threshold value of setting, rmFor the initiation layer resistance of m root steel band,For in addition to m root steel band its
The average value of its all steel band initiation layer resistance, vppmFor the undulating value of m root steel band resistance,For except m root steel
Average value with outer other all steel band resistance fluctuation values, vppmFor the undulating value of m root steel band resistance, SmFor m root steel band electricity
The standard deviation of resistance,For the average value of all steel band resistance standard differences other in addition to m root steel band,For m root
The reduced value of steel band initiation layer resistance growth trend and other steel bands,For m root steel band steel band electricity
The reduced value of undulating value growth trend and other steel bands is hindered,For the increase and decrease of m root steel band steel band resistance standard difference
The reduced value of trend and other steel bands.
7. any one of -6 elevator traction steel band tension and performance degradation monitoring method according to claim 1, it is characterised in that:
Several Steel cords are equipped in steel band, the elevator traction steel band tension and performance degradation monitoring method and system further include list
Root steel band detecting step: specific currents are all injected to every Steel cord in single steel band, and detect each steel wire in the root steel band
Then the voltage value of wire rope core carries out implementation monitoring to every Steel cord in steel band using step S2-S4.
8. the system for realizing any one of the claim 1-7 elevator traction steel band tension and performance degradation monitoring method, special
Sign is: including specific currents occurring source, voltage detection module, memory module, data processing module, wherein the specific electricity
Flowing occurring source includes several groups periodic current source, is connected respectively with the Steel cord of each steel band；The voltage detection module
The Steel cord of each root steel band is detected for acquiring the Steel cord voltage of each steel band, and according to the specific currents of acquisition
Resistance；Data processing module receives the data of voltage detection module and calculates characteristic value, is stored in memory module, and determines each
Whether the Steel cord of a steel band and each steel band is normal.
9. system according to claim 8, it is characterised in that: the data processing module further includes that service life assessment is single
Member, according to comparing result and variation tendency, assesses making for each steel band for comparing each characteristic value and initial characteristic values
Use the service life.
10. system according to claim 8 or claim 9, it is characterised in that: it further include warning device, the warning device and number
It is connected according to processing module, further includes display module for showing each steel band state and communicate with elevator main control unit, upload
The communication module of each steel band data of elevator.
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