CN105905729B - Elevator traction brake force monitoring method based on big data - Google Patents
Elevator traction brake force monitoring method based on big data Download PDFInfo
- Publication number
- CN105905729B CN105905729B CN201610503756.7A CN201610503756A CN105905729B CN 105905729 B CN105905729 B CN 105905729B CN 201610503756 A CN201610503756 A CN 201610503756A CN 105905729 B CN105905729 B CN 105905729B
- Authority
- CN
- China
- Prior art keywords
- elevator
- brake
- traction
- traction machine
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0037—Performance analysers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/28—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for testing brakes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Elevator Control (AREA)
Abstract
The present invention discloses a kind of elevator traction brake force monitoring method based on big data, including, elevator is preheated；Lift car rests in time top layer；Brake dead electricity holds traction sheave tightly；Transducer drive traction machine strap brake is run；Monitor the power output of frequency converter；Judge whether traction machine rotates by encoder；Before power converter output does not reach Pmax, encoder perceives the moment that traction machine starts rotation, records instantaneous power value, the performance number is uploaded by network；Lateral comparison；Longitudinal comparison；Elevator is continuing with or maintenance shut-downs.Beneficial effect is：Transducer drive power is an objective amount for reacting traction machine performance, pass through brake traction sheave, the method of transducer drive traction sheave strap brake operation, assistance by the driving power of frequency converter by elevator big data, brake force is subjected to more objective description and judge, breach the drawbacks of needing to be manually set critical value or threshold values so that evaluation result more has practical meaning in engineering.
Description
Technical field
The present invention relates to elevator detection field；More particularly to a kind of brake force intelligence of the elevator traction machine based on big data
Monitoring method can be changed.
Background technology
Elevator steps into the life of people and is increasingly becoming indispensable in the daily production and living of people set more and more
Apply, it not only accelerates the rhythm of life of people, and improves the operating efficiency of people, further improves the life bar of people
Part, irreplaceable important function is played in socio-economic development, be that one kind is directly connected to people life property safety
Special equipment.Traction machine is one of core component of elevator, for traction machine, brake be even more its important part it
One, the function of brake is that the inactive state of lift car is kept in Elevator landing；Enable car when Lift out of order
Enough emergency decelerations stop and keep its inactive state, and still elevator reparing does not maintain unit operational maintenance to the correlation test of brake force
In important maintenance project, even more inspection project important in elevator Legal Inspection.Frequently start and stop are required for traction to traction machine
The participation of brake, the working frequency of brake are high：When traction machine normally rotates, the brake near traction sheave leads to
Electric brake arm is opened completely, and traction sheave rotates freely, and when traction sheave needs to shut down, traction machine shuts down, brake
Power-off brake arm tightly holds traction sheave tightly, prevents traction sheave from rotating freely.Meanwhile frequently open and close along with brake
Close, the fixedly connected part of brake is it is possible that the phenomenon loosened, the brake force of brake is it is possible that reduce, Yi Ji
Elevator per first quarter moon maintenance in, if adjust brake arm apart from when occur error, can cause under brake force
Drop.In addition, elevator occur in the process of running brake brake rubber block abrasion or strap brake operation caused by brake rubber block abrasion and
The loosening of brake arm nut, brake ability are bound to change.
The brake force of traction machine brake, which reduces, can cause the safe operation of elevator not to be protected, therefore, for electricity
The monitoring of the brake force of terraced traction machine brake is most important.But elevator traction machine form is more, wherein coordinate with traction sheave
Brake pattern is also different.The brake structure of armful drum brake is completely exposed outer outside in addition to old-fashioned, is monitoring device
Leave outside certain installing space, the brake structural compared with new model permanent magnetic synchronous traction machine is compact, or with traction sheave melt for
One, or traction machine is non-maintaining type, for increasing mechanical structure or electric device in brake, directly monitoring is made for this
The braking shoe guide of dynamic device and the distance of traction sheave become very difficult, and larger obstacle is provided with for the direct monitoring of brake.
Elevator accident statistical analysis shows, is being rushed to summit with elevator or the severe safety accident majority at crouching bottom comes from electricity
Terraced misfunctioning of brake.Therefore, the detection of brake and those skilled in the art are always in the problem of research.
At present, patent application publication number is that CN104495547A discloses a kind of detection method of elevator brake, but should
Detection method has some places not fully up to expectations：1. need to preset the critical value of traction machine brake torque, for work
Cheng Shiji is not easy to operate.2. add human cost, it is necessary to have staff on duty when being detected every time.
Patent application publication number discloses the detection method of elevator brake braking moment, but the inspection for CN104192662A
Survey method has some places not fully up to expectations：1. the value of the first torque current and the second torque current does not consider electricity
The actual conditions of ladder, while the proposition Personalized Ways also do not suited measures to local conditions.2. the first torque current and the second torque current
Setting is complicated, does not apply to automation mechanized operation.
The content of the invention
The technical problem to be solved by the invention is to provide a kind of reliable easily quantification monitoring brake braking force
Method.
The technical solution adopted in the present invention is：A kind of elevator traction brake force monitoring method based on big data, bag
Include following steps：
A. elevator is preheated；
B. the car of elevator rests in time top layer, and N-1 layers, N is elevator top；
C. brake dead electricity, brake hold traction sheave tightly completely；
D. transducer drive traction machine strap brake is run, and electric current is started from scratch increase 0.5A per second；
E. the power output P of frequency converter is monitored, until reaching the peak power output Pmax of frequency converter；
F. judge whether traction machine rotates by encoder；
G. when power converter output P is before Pmax is reached, encoder does not perceive traction machine and starts to rotate, experiment knot
Beam, elevator can be continuing with；
H. when power converter output P is not before Pmax is reached, encoder perceives the moment that traction machine starts rotation, note
The instantaneous power value P0 of record now, and the performance number is uploaded by network；
I. lateral comparison, to the elevator of same type identical parameters, can be become after identical brake force test is carried out
Frequency device power output P1, P2 ... Pn, by P0 and P1, P2 ... Pn analyzed and compared with；
J. longitudinal comparison, frequency converter is gone through during traction machine rotation under the elevator brake closure situation periodically measured to elevator
History power output P1', P2'...Pn', by P0 and P1', P2'...Pn' analyzed and compared with；
K. elevator is continuing with or maintenance shut-downs.
The power output monitoring of step E frequency converters, pass through the program built in frequency converter or the external power sensor of increase；
The encoder that step F is carried by traction machine perceives the rotation of traction machine.
The I power converter outputs P0 is in lateral comparison, orderIfThen it is judged as occurring significantly to degenerate；
The J power converter outputs P0 is in longitudinal comparison, order IfThen it is judged as occurring significantly to degenerate.
The J power converter outputs P0 makes P in longitudinal comparison,minFor the minimum value in P1', P2'...Pn', if
1.1P0 ＜ P,min, then it is judged as occurring significantly to degenerate.
The beneficial effects of the invention are as follows：Because transducer drive power is an objective amount of reaction traction machine performance, lead to
Cross brake traction sheave, the method for transducer drive traction sheave strap brake operation, by the driving power of frequency converter by elevator
The assistance of big data, brake force is subjected to more objective description and judge, breaching needs to be manually set critical value or threshold values
The drawbacks of so that evaluation result more has practical meaning in engineering.Braking force monitoring methods based on big data, it can make up existing
There is the inconvenience that method of testing is tested brake force with inaccurate, the early warning for follow-up traction provides technical support.
Brief description of the drawings
Fig. 1 is the flow chart of traction monitoring of the present invention.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description：
The brake force of the traction machine brake different to form on the market proposes a kind of general monitoring method, overcomes difference
The problem of form brakeage principle is different, brake spaces compact, by unified method to traction machine brake
Brake force carries out indirect quantification objective description, passes through brake traction sheave, the side of transducer drive traction sheave strap brake operation
Method, the assistance by the driving power of frequency converter by elevator big data, brake force can be subjected to more objective description and judge,
Breach the drawbacks of needing to be manually set critical value or threshold values so that evaluation result more has practical meaning in engineering, intelligence
Degree height can be changed, manual operation is few.
In order to not influence passenger's boarding, improving the security of experiment and reduce damage of the experiment to equipment, experiment is usual
It is set as autonomous intelligence monitoring in two months once, but can also freely sets monitoring interval time according to the actual needs.Together
When, experiment be generally set to Elevator Transportation Flow it is at a low ebb during, such as be set in 2:00 AM and start monitoring and test, but survey
The examination time can also independently select.Do not run within elevator 15min to be tested, i.e., within 15min, elevator traction machine does not have
Rotary motion, and elevator does not have switch gate action.Elevator can formally enter test procedure, and elevator is entering experiment journey
After sequence, elevator no longer respond elevator outer calling and it is interior select signal, the door machine temporary close of elevator, do not carrying out switch gate action, with
Ensure the continuity of experiment.
The normal operating conditions of elevator traction machine is：During traction machine rotary work, brake guaranties, the band-type brake gram of brake
Take flexible member acting to open completely, traction sheave of tractor can rotate freely；When traction machine needs to stop, traction machine stops
Operating, brake dead electricity, the band-type brake of brake hold traction sheave tightly, for preventing traction sheave completely due to the effect of flexible member
Rotation.
As shown in figure 1, a kind of elevator traction brake force monitoring method based on big data of the present invention, including following step
Suddenly：
A. elevator is run to secondary top layer, elevator from the bottom and preheated with normal speed；If sent out during preheating is tested
Raw failure, experiment terminate at once, and notify elevator maintenance staff to carry out fault restoration.
B. the car of elevator rests in time top layer, and N-1 layers, N is elevator top；
C. brake dead electricity, brake hold traction sheave tightly completely, prevent rotating freely for traction sheave；
D. in the case of brake is cold, i.e., in the case that brake tightly holds traction sheave tightly, transducer drive drags
Draw the operation of machine strap brake, electric current is started from scratch increase 0.5A per second, until off-test, operating personnel also can voluntarily adjust electric current
Increase situation；
E. the power output P of frequency converter is monitored, until reaching the peak power output Pmax of frequency converter；Monitor frequency converter
Power output, the program built in frequency converter or the external power sensor of increase can be passed through；
F. being continuously increased with transducer drive electric current, the power output P of frequency converter also constantly increase, until traction
Machine starts to rotate, and perceives traction machine and starts the encoder that the device of rotation carries for traction machine.
G. the rotation of traction machine is perceived by encoder；The traction machine of every elevator can all be set before adjustment and installation operation
Determine the maximum output protection power P max of frequency converter.When frequency converter power output P in gradual increase until reaching Pmax before,
Encoder does not perceive the rotation of traction machine, and experiment can terminate, and experiment shows that the brake force of traction machine is sufficiently large, and elevator can be with
It is continuing with.
H. when power converter output P is not before Pmax is reached, encoder perceives the moment that traction machine starts rotation, note
The instantaneous power value P0 of record now, and the performance number is uploaded by network；
I. lateral comparison, to the elevator of same type identical parameters, frequency conversion can be obtained after identical brake force test is carried out
Device power output P1, P2 ... Pn, by P0 and P1, P2 ... Pn analyzed and compared with；Order
IfThen it is judged as occurring significantly to degenerate；
J. longitudinal comparison, frequency converter history is defeated when traction machine rotates under the elevator brake closure situation periodically measured to elevator
Go out power P 1', P2'...Pn', by P0 and P1', P2'...Pn' analyzed and compared with；Order
IfThen it is judged as occurring significantly to degenerate；P,minFor the minimum value in P1', P2'...Pn', 1.1P0 ＜
P,min, then it is judged as occurring significantly to degenerate；
If being K. judged as, obvious degeneration occurs for brake force, and elevator then enters pipe diameter design, and elevator is not entering normal fortune
Row mode, elevator are stopped using and notify maintenance staff to repair as early as possible at once.
If being judged as, brake force does not occur significantly to degenerate, and elevator can be continuing with.
It is worthy of note that in the overall process tested at this, the brake of traction machine no power, i.e. brake all the time
Arm is due to the holding traction sheave acted on all the time tightly of flexible member.
The present invention operation principle be：In the state of brake closure, i.e. the holding traction sheave of brake tightly
In the case of, the gradual increase of the power of frequency converter from small to large is driven, the brake force of brake is overcome, forces traction sheave to revolve
Turn, by the method for the driving power indirect monitoring brake force of frequency converter, and under the wide variety of background of big data, fully will
Operational factor carries out lateral comparison and longitudinal comparison, and assistance judges equipment running status, with the mode of thinking pair of big data management
The brake force of brake is monitored.
Embodiment：One certain brand elevator, essential information are as follows：6 layer of 6 station, nominal load capacity：800kg, normal speed：
1m/s, rated power：5kW, rated voltage：380V, rated current：12A, frequency converter maximum protection power are 7.5kW.
Elevator starts monitoring test in the 2:00 AM of one day, detected in 15min according to pre-customized dynamic monitoring program
The traction machine of elevator does not rotate, and elevator does not have switch gate action, then it is assumed that does not have passenger in car, hereafter elevator is no longer
Response outgoing call and it is interior select signal, the door machine temporary close of elevator, switch gate action is not being carried out, to ensure the continuity of experiment.
Elevator is run to secondary top layer, i.e., 5 layers, the preheating preparation before being tested with normal speed from the bottom.
Lift car carries out correlation test in 5 stops, and for brake in the case where being not powered on, brake tightly holds traction tightly
Wheel.Transducer drive traction machine strap brake is run, and driving current, which is started from scratch, to be stepped up, and setting electric current increases 0.5A with each second
Speed be stepped up, with the gradual increase of electric current, power output is also gradually increasing.
When power increases to 7.5kW, i.e., frequency converter maximum protection power when, traction machine does not rotate also, and now experiment is vertical
Quarter terminates, and elevator is recovered normal use.
When power increases to 4kW, traction machine starts to rotate, i.e. P0=4kW, instantaneous power now is passed through into network
Transmission, for big data background analysis and compare：
A) lateral comparison：The elevator of same type identical parameters, frequency conversion can be obtained after identical brake force test is carried out
Device power output：4kW、5kW、3kW.
B) longitudinal comparison：The elevator periodically measures the traction machine rotation under elevator brake closure situation, and the frequency converter is gone through
History power output：4.5kW、4kW、4kW、4kW.
In lateral comparison, Then it is judged as that significant degradation does not occur.
In longitudinal comparison, Then it is judged as that significant degradation does not occur.
In longitudinal comparison, P 'min=4kW, 1.1P0=4.4kW ＞ P 'min=4kW, then it is judged as not occurring substantially to move back
Change.
By the lateral comparison and longitudinal comparison of big data, it is judged as that significant degradation does not occur.After end to be tested, elevator
Revert to normal operating condition.
The brake force of the present invention traction machine brake different to form on the market proposes a kind of general monitoring method, gram
The problem of taking different multi-form brakeage principle, brake spaces compact, by unified method to traction mechanism
The brake force of dynamic device carries out indirect quantification objective description, the method run by traction sheave strap brake, and the driving for brake force turns
Square electric current does not need complicated setting, but carries out personalized setting according to the actual conditions of every traction machine；Work(will be driven
Rate carries out more objective description and judge by the assistance of elevator big data to brake force, breach need to be manually set it is critical
The drawbacks of value or threshold values so that evaluation result more has practical meaning in engineering, avoids carrying out various model traction machines
Identical is set, and intelligence degree is high, and manual operation is few.
Advantage of the invention is that：1. the elevator traction brake force monitoring method based on big data can be entered to brake force
Capable regularly intellectual monitoring, automaticity is high, and human intervention is few, and intelligence degree is high.To instruct traction machine preventative maintenance
Strong reference is provided, and reduces the pressure of the annual Legal Inspection of elevator.
2. the monitoring method of tested traction brake force goes for most of traction machine in the market, lead to
It is strong with property, small, convenient development is influenceed on original device.
3. the elevator traction brake force monitoring method based on big data, by way of big data, is draged with same type
Draw the data lateral comparison of brake test data and the longitudinal comparison with this traction machine brake historical data, comprehensive ratio
Compared with and judge, given full play to the advantage and convenience of big data.
4., can be whole unattended during experiment, in the case where being judged as that significant degradation occurs for brake force, just enter
The notice of row maintenance staff, can further lifting test intelligent level, reduce further human cost.
Claims (2)
1. a kind of elevator traction brake force monitoring method based on big data, it is characterised in that comprise the following steps：
A. elevator is preheated；
B. the car of elevator rests in time top layer, and N-1 layers, N is elevator top；
C. brake dead electricity, brake hold traction sheave tightly completely；
D. transducer drive traction machine strap brake is run, and electric current is started from scratch increase 0.5A per second；
E. the power output P of frequency converter is monitored, until reaching the peak power output Pmax of frequency converter；
F. judge whether traction machine rotates by encoder；
G. when power converter output P is before Pmax is reached, encoder does not perceive traction machine and starts to rotate, off-test, electricity
Ladder can be continuing with；
H. when power converter output P is not before Pmax is reached, encoder perceives the moment that traction machine starts rotation, record
Instantaneous power value P0 now, and the performance number is uploaded by network；
I. lateral comparison, to the elevator of same type identical parameters, frequency converter can be obtained after identical brake force test is carried out
Power output P1, P2 ... Pn, by P0 and P1, P2 ... Pn analyzed and compared with；
The power converter output P0 in lateral comparison, make `P=（P1+ P2+…+ Pn）/ n, if 1.1P0 ＜ `P, sentence
Break as obvious degenerate occurs；
J. longitudinal comparison, frequency converter history is defeated during traction machine rotation under the elevator brake closure situation periodically measured to elevator
Go out power P 1', P2'... Pn', by P0 and P1', P2'... Pn' analyzed and compared with；
The power converter output P0 makes `P'=in longitudinal comparison（P1'+ P2'+…+ Pn'）/ n, if 1.1P0 ＜ `P',
Then it is judged as occurring significantly to degenerate；
The power converter output P0 makes P in longitudinal comparison, minFor the minimum value in P1', P2'...Pn', if 1.1P0 ＜
P, min, then it is judged as occurring significantly to degenerate；
K. elevator is continuing with or maintenance shut-downs.
2. the elevator traction brake force monitoring method according to claim 1 based on big data, it is characterised in that step
The power output monitoring of E frequency converters, pass through the program built in frequency converter or the external power sensor of increase；
The encoder that step F is carried by traction machine perceives the rotation of traction machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610503756.7A CN105905729B (en) | 2016-06-30 | 2016-06-30 | Elevator traction brake force monitoring method based on big data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610503756.7A CN105905729B (en) | 2016-06-30 | 2016-06-30 | Elevator traction brake force monitoring method based on big data |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105905729A CN105905729A (en) | 2016-08-31 |
| CN105905729B true CN105905729B (en) | 2018-01-26 |
Family
ID=56754170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610503756.7A Active CN105905729B (en) | 2016-06-30 | 2016-06-30 | Elevator traction brake force monitoring method based on big data |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105905729B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181519B (en) * | 2017-11-23 | 2020-09-18 | 廊坊凯博建设机械科技有限公司 | Method for dynamically testing band-type brake of elevator traction machine |
| CN109855785A (en) * | 2019-02-12 | 2019-06-07 | 明阳智慧能源集团股份公司 | Method for detecting braking torque of variable-pitch motor of wind generating set |
| CN110294380B (en) * | 2019-07-09 | 2020-11-10 | 天津市特种设备监督检验技术研究院(天津市特种设备事故应急调查处理中心) | Elevator brake band-type brake response performance monitoring method and monitoring device based on data driving |
| CN110271932A (en) * | 2019-07-09 | 2019-09-24 | 天津市特种设备监督检验技术研究院(天津市特种设备事故应急调查处理中心) | A kind of elevator traction force monitoring methods |
| CN110482352B (en) * | 2019-08-15 | 2020-10-23 | 天津鼎华检测科技有限公司 | Elevator traction force monitoring method and device based on data driving |
| CN111320048B (en) * | 2020-03-13 | 2024-06-04 | 深圳市质量安全检验检测研究院 | Elevator brake test device and test method thereof |
| CN112299180B (en) * | 2020-11-11 | 2022-04-08 | 内江市特种设备监督检验所 | Traction-driven elevator traction machine braking moment self-monitoring method |
| CN115893135A (en) * | 2021-08-06 | 2023-04-04 | 广东美的暖通设备有限公司 | Method and device for detecting brake equipment in elevator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1486921A (en) * | 2001-12-11 | 2004-04-07 | ��ʽ������������ϵͳ | Electromagnetic braking device and elevator abnormality detection device |
| CN101143670A (en) * | 2007-09-20 | 2008-03-19 | 上海三意楼宇实业有限公司 | Electrical protection method and device during frequency-changing elevator mechanical brake disabling |
| EP2460753A1 (en) * | 2010-12-03 | 2012-06-06 | Inventio AG | Method for testing elevator brakes |
| CN102653368A (en) * | 2011-03-02 | 2012-09-05 | 东芝电梯株式会社 | Elevator system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1986945A4 (en) * | 2006-02-14 | 2011-12-21 | Otis Elevator Co | Elevator brake condition testing |
| JP4470950B2 (en) * | 2007-02-28 | 2010-06-02 | 株式会社日立製作所 | Elevator system |
| WO2011002447A1 (en) * | 2009-06-30 | 2011-01-06 | Otis Elevator Company | Gravity driven start phase in power limited elevator rescue operation |
| WO2013088823A1 (en) * | 2011-12-12 | 2013-06-20 | 三菱電機株式会社 | Electromagnetic brake condition diagnosis device and method therefor |
-
2016
- 2016-06-30 CN CN201610503756.7A patent/CN105905729B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1486921A (en) * | 2001-12-11 | 2004-04-07 | ��ʽ������������ϵͳ | Electromagnetic braking device and elevator abnormality detection device |
| CN101143670A (en) * | 2007-09-20 | 2008-03-19 | 上海三意楼宇实业有限公司 | Electrical protection method and device during frequency-changing elevator mechanical brake disabling |
| EP2460753A1 (en) * | 2010-12-03 | 2012-06-06 | Inventio AG | Method for testing elevator brakes |
| CN102653368A (en) * | 2011-03-02 | 2012-09-05 | 东芝电梯株式会社 | Elevator system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105905729A (en) | 2016-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105905729B (en) | Elevator traction brake force monitoring method based on big data | |
| CN106115399B (en) | Elevator traction machine traction force monitoring methods based on big data | |
| CN103407920B (en) | A kind of intelligent deep hole rope winch being driven by variable-frequency motor | |
| CN103359559B (en) | Elevator having operation switching system | |
| CN104192662A (en) | Detecting method for braking torque of elevator brake | |
| CN102826437B (en) | Device for recording and monitoring running of staircase | |
| CN104512809A (en) | Monitoring method of braking fault of elevating mechanism in crane | |
| CN109500085A (en) | Volume unloads winding apparatus and its working method on a kind of production board band volume | |
| CN110271932A (en) | A kind of elevator traction force monitoring methods | |
| CN104401834A (en) | Detection device and method for brake force of elevator traction machine | |
| CN202785224U (en) | Escalator running recording and monitoring device | |
| CN205346554U (en) | Elevator emergency acoustic system | |
| CN207699130U (en) | A kind of direct current steel cable elevator | |
| CN106185522A (en) | Escape device on elevator | |
| CN108773742A (en) | Method for security protection, electric life controller and elevator device is driven by force | |
| CN205906844U (en) | Prevent unexpected protection device who removes of elevator | |
| CN220264824U (en) | Elevator braking inspection device | |
| CN107215798A (en) | Hydraulic hoisting crane hoisting mechanism braking ability early warning system | |
| CN206901648U (en) | Electric travelling crane hoisting mechanism braking ability early warning system | |
| CN105174065B (en) | Failure monitoring method for crane | |
| CN109538569B (en) | Detection system and method for hydraulic motor and engineering vehicle | |
| CN206901647U (en) | Hydraulic hoisting crane hoisting mechanism braking ability early warning system | |
| CN111055880B (en) | Fault-proof device for coal mine inclined roadway transportation and control method thereof | |
| CN102501857B (en) | A kind of passenger transport cableway safety device based on load distortion | |
| CN106395542A (en) | Friction hoist overwinding-preventing and failure alarm system based on ABS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 32 Space Road, Nankai District, Tianjin City, 300192 Patentee after: Tianjin Institute of Special Equipment Supervision and Inspection Technology (Tianjin Special Equipment Accident Emergency Investigation and Treatment Center) Address before: No. 32 Space Road, Nankai District, Tianjin City, 300192 Patentee before: Tianjin Inst of Special Appliances Supervision and Check Tech |
|
| CP01 | Change in the name or title of a patent holder |