CN103538982B - A kind of escalator monitoring device - Google Patents
A kind of escalator monitoring device Download PDFInfo
- Publication number
- CN103538982B CN103538982B CN201310532652.5A CN201310532652A CN103538982B CN 103538982 B CN103538982 B CN 103538982B CN 201310532652 A CN201310532652 A CN 201310532652A CN 103538982 B CN103538982 B CN 103538982B
- Authority
- CN
- China
- Prior art keywords
- elevator
- sedan
- signal
- speed
- coder
- 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
- B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
- B66B3/002—Indicators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3492—Position or motion detectors or driving means for the detector
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
A kind of escalator monitoring device, in elevator speed sedan-chair, read out instrument gathers elevator real-world operation speed signal by being arranged on main frame axle head coder, control mainboard is sent to by PG card, elevator control program according to collection running speed signal analyzing and processing, then is sent to display panel in sedan-chair by CAN communication.Compared to the prior art, tool of the present invention has the following advantages: read out instrument in elevator speed sedan-chair, can the current running velocity of clear display car, makes passenger understand the running velocity of taken elevator, enriches display frame in sedan-chair.Multiple monitoring mode ensure that the monitoring reliability to elevator operation, the setting of optical detection module, makes elevator monitoring systems more simple, eliminates redundancy wiring and elevator rocks impact on monitoring system.
Description
Technical field
The present invention relates to elevators field, specifically refer to a kind of monitoring device of elevator speed position.
Background technology
Existing elevator does not have running velocity display in sedan-chair, and only just can check elevator speed when mainboard attended operation device, so passenger cannot understand the real-world operation speed of taken elevator, especially express elevator problem is more outstanding.This problem can by realizing in encoder feedback data transmission to the telltale in car, its critical component is coder, and the signal that elevator safety controls also comes from coder, as: the reason producing elevator stall fault has following two kinds of situations: 1. elevator runs, i.e. speed V > 0m/s, if the speed V=0 returned by encoder feedback now detected, and this situation maintains 5s clock, then occur stall fault, elevator emergency stops.If do not revised after repeating 4 times, then master controller is out of service.2. the direction of current operation established by elevator, but elevator does not run, if at this moment detect that the impulse speed fed back by rotary encoder is less than the half of rated speed of lift, and this state maintains 0.15s clock, then elevator does not rerun, and elevator is disannuled a call simultaneously.Elevator slips according to current established direction, if record direction that encoded device feeds back and current direction inconsistent, and speed V > 0.35m/s, this kind of state maintains 0.8s, then elevator emergency stops.Elevator overspeed elevator is in the middle of normal course of operation, if detect that speed that encoder feedback is returned is greater than 1.15 times of rated speed of lift, this state can only maintain 0.8s, then elevator emergency stops.If do not revised after repeating 4 times, then master controller does not rerun.Need the artificial T that maintenance/normal switch on control housing first pushed to overhaul T, then be restored to the normal T of T; Or first power-off re-powers reset again.Attempt the proportionality coefficient by strengthening during converter low-frequency; Or the coefficient strengthening T delay contracting 1T solves; Or add load compensation solution.Dislocation (more than 45CM), revise under non-write layer state when bumping against short speed reducing switch at lower end, in the middle of the downward operational process of elevator, compared with these data recorded when to write layer in the position (descending individual layer speed reducing switch is by → action of being failure to actuate) being fed back car by rotary encoder, when the absolute value of its difference is greater than 45CM, in the moment of descending individual layer speed reducing switch action, the data of the descending individual layer speed reducing switch of record during original to write layer are revised.Visible code device signal runs elevator and serves vital effect, because coder is arranged on mair motor usually, by monitoring motor or with on the power wheel of motor linkage, its inefficacy will cause the confusion of elevator operation, and its error in data also likely causes the generation of elevator safety accident, therefore increases very necessary to the monitoring mode of elevator operation, at present, institute's employing means mainly install the modes such as approach switch sensor additional, which increase elevator pipeline, complicated layout.
Summary of the invention
First the present invention will provide the speed display device in a kind of lift car,
And then a kind of both sides' formula acquisition of signal is provided, coder can be prevented malfunctioning, accurately can show the device of elevator speed, can in elevator the current running velocity of the clear display in railway carriage or compartment car, make passenger understand the running velocity of taken elevator, enrich display frame in sedan-chair.
A nearlyer step provide a kind of both sides' formula acquisition of signal, the safety device of abnormal elevator condition monitoring.
The present invention adopts following technical scheme: a kind of escalator monitoring device, in elevator speed sedan-chair, read out instrument gathers elevator real-world operation speed signal by being arranged on main frame axle head coder, control mainboard is sent to by PG card, elevator control program according to collection running speed signal analyzing and processing, then is sent to display panel in sedan-chair by CAN communication.
This elevator comprises driving circuit and drives mair motor motion, the output shaft of mair motor connects the fifth wheel with coder, coder by the electric machine rotation Signal transmissions that monitored by fifth wheel on PG card, PG card outputs on elevator control panel after being processed by the signal of the coder of different output form, the signal of binding time parametric t process is converted into speed parameter v1 by elevator control panel, pass through CAN, be transferred on sedan-chair top board, this speed parameter v1, by data bus connection, is real-time transmitted to and is arranged on the telltale of cab interior by sedan-chair top board.
Further, this device is also provided with optical detection module, it is arranged on outside lift car, car displacement parameter can be obtained, this car displacement parameter s is real-time transmitted to and controls on its micro controller system by optical detection module, by the time parameter t of micro controller system self crystal oscillator, calculate the real-time speed parameter v2 of this elevator, speed parameter v2 is transferred to elevator control panel, itself and the speed parameter v1 that self calculated by code device signal are compared by elevator control panel, if difference is at tolerance interval, data are effective, checking coder effectively works, elevator is working properly.
The car run in hoistway is by wirerope 2 traction, and this wirerope 2 is driven by electrical motor 1, and this electrical motor 1 is provided with drive pulley; .Indicia band 4 is equipped with in the side of hoistway, and car is then equipped with optical detection module 3.Indicia band 4 makes of reflex-reflective material.Indicia band is arranged on hoistway specific position, as with car when every layer of exit position, car glazing detecting module correspondence position, each indicia band width is different.When optical detection module is by indicia band, because its principle accepts diffuse light to realize detection, it is through the reflex-reflective material of mirror-reflection, there will be without diffusing signal, the situation of signal deletion, now by calculating the distance that disappearance occurs, can judge lift car present position.
Optical detection module forms one by illuminating lamp 7, lens 12, pectination photoelectric device 10, aperture dividing plate 11, amplifier 9 and outer casing stand 6, light beam is launched by illuminating lamp, impinge upon on object 8, its reflected light scioptics 12 enter in detecting head, after aperture dividing plate, imaging is on dressing photoelectric device, form signal after amplifier 9 processes, transfer on micro controller system.Wherein detecting head and object 8 surface is vertical, and illuminating lamp and detecting head are acute angle, is especially good with 45 degree.
The multiple photosensitive bar that pectination photoelectric device 10 is made up of silicon photodiode array detector, connects into two groups, symmetrically alternate pectination arrangement.
Compared to the prior art, tool of the present invention has the following advantages: read out instrument in elevator speed sedan-chair, can the current running velocity of clear display car, makes passenger understand the running velocity of taken elevator, enriches display frame in sedan-chair.Multiple monitoring mode ensure that the monitoring reliability to elevator operation, the setting of optical detection module, makes elevator monitoring systems more simple, eliminates redundancy wiring and elevator rocks impact on monitoring system.
Accompanying drawing explanation
Fig. 1 is that schematic diagram arranged by elevator of the present invention;
Fig. 2 is control circuit figure of the present invention;
Fig. 3 is optical detection modular construction schematic diagram of the present invention;
Detailed description of the invention
In elevator speed sedan-chair, read out instrument gathers elevator real-world operation speed signal by being arranged on main frame axle head coder, control mainboard is sent to by PG card, elevator control program according to collection running speed signal analyzing and processing, then is sent to display panel in sedan-chair by CAN communication.
Coder that the present invention adopts is absolute rotary-type magnetic coder, it makes use of hall principle and comes detection axis position, and it is attached on the axle of apparatus and a twin shaft Hall effect transducer be arranged in encoder housing against a permanent magnet.When axle and magnet rotate, Hall effect transducer is measured the change in magnetic field and is provided angle measurement to control system.
Coder is a kind of digital transducer, and can be used for needs in elevator to carry out in the kinematic scheme of accurately control speed.Compared with optical encoder, magnetic encoder is not subject to the impact of environmental pollution, humidity and ray, and reliability is high, simple and compact for structure, and volume is little, and cost is low, fast response time.
Measured the rotation of motor by coder, make coder export continuous print impulse singla to PG card, realize Digit Velocity.PG card, outputs on elevator control panel after the signal of the coder of different output form can being processed, and can realize motor speed and control and position control (location).
Coder is by the real-world operation speed of fifth wheel reflection elevator, and elevator speed is faster, and operated motor rotating speed is higher.When elevator runs with command speed, operated motor normal operation; When elevator speed exceedes command speed and constantly accelerates to reach operated motor overspeed switch responsiveness, overspeed switch produces electrical action, cutting-off controlling circuit stop elevator; If stop is invalid and elevator continues acceleration row, when reaching more than 120% of its command speed, by mechanical action, its rope sheave is shut down, and has lifted the connecting rod mechanism be arranged on car beam by the friction force in rope sheave or rope grip mechanism, thus make lift car by force stop on guide rail.Only after all safety switchs reset, elevator just can restart.
This elevator comprises driving circuit and drives mair motor motion, the output shaft of mair motor connects the fifth wheel with coder, coder by the electric machine rotation Signal transmissions that monitored by fifth wheel on PG card, PG card outputs on elevator control panel after being processed by the signal of the coder of different output form, the signal of binding time parametric t process is converted into speed parameter v1 by elevator control panel, pass through CAN, be transferred on sedan-chair top board, sedan-chair top board passes through data bus connection, this speed parameter v1 is real-time transmitted to, is arranged on the telltale of cab interior.
Further, this device is also provided with optical detection module, it is arranged on outside lift car, car displacement parameter can be obtained, this car displacement parameter s is real-time transmitted to and controls on its micro controller system by optical detection module, by the time parameter t of micro controller system self crystal oscillator, calculate the real-time speed parameter v2 of this elevator, by speed parameter v2, transfer to elevator control panel, itself and the speed parameter v1 that self calculated by code device signal are compared by elevator control panel, if difference is at tolerance interval, data are effective, checking coder effectively works, elevator is working properly.
The car run in hoistway is by wirerope 2 traction, and this wirerope 2 is driven by electrical motor 1, and this electrical motor 1 is provided with drive pulley.Indicia band 4 is equipped with in the side of hoistway, and car is then equipped with optical detection module 3.Indicia band 4 makes of reflex-reflective material.Indicia band is arranged on hoistway specific position, as with car when every layer of exit position, car glazing detecting module correspondence position, each indicia band width is different.When optical detection module is by indicia band, because its principle accepts diffuse light to realize detection, it is through the reflex-reflective material of mirror-reflection, there will be without diffusing signal, the situation of signal deletion, now by calculating the distance that disappearance occurs, can judge lift car present position.
Optical detection module forms one by illuminating lamp 7, lens 12, pectination photoelectric device 10, aperture dividing plate 11, amplifier 9 and outer casing stand 6, light beam is launched by illuminating lamp, impinge upon on object 8, its reflected light scioptics 12 enter in detecting head, after aperture dividing plate, imaging is on dressing photoelectric device, form signal after amplifier 9 processes, transfer on micro controller system.Wherein detecting head and object 8 surface is vertical, and illuminating lamp and detecting head are acute angle, is especially good with 45 degree.
Pectination photoelectric device 10 forms the multiple photosensitive bar of n>>1 by silicon photodiode array detector, connects into A, B two groups, symmetrically alternate pectination arrangement, if the spacing of the photosensitive bar of same group is T, x is sense of motion.Image on this large area pectination device by the image of lens forming, form photocurrent Ia, Ib, circuit makes both subtract each other.In general, both are irregular because of image, the difference of illuminating area and unequal, and when sensor moves, image is in change, and Ia, Ib are also in change.
When image moves past T/2 on pectination device, a photosensitive bar the most front except working direction receives except new images, and it is constant that remaining receives image, but the image being originally in the photosensitive bar of A group has moved on in B group, and vice versa.Due to n>>1, so the photocurrent produced becomes Ia<Ib, namely the electric signal of instrumentation amplifier reception is anti-phase.Equally, when image moves past T distance, on the basis of T/2, except the photosensitive bar image change that sense of motion is the most front, the image of all the other photosensitive bars restores to the original state again, so electric signal is again anti-phase, forms the pseudo sine wave of one-period.At this moment due to the image convergent-divergent effect of lens, the T-phase on pectination device is worked as in the distance MT of ground image movement.That is, ground distance MT is transformed into electric signal, has just been equivalent to a pseudo sine wave.Sensor design coefficient is 4mm/ pulse, and namely 4mm distance in road surface can produce a waveform.Due to photosensitive number n>>1, and image to move be gradual change, so the amplitude of electric signal is also gradual change.As long as signal conditioning circuit becomes TTL square wave this signal transacting, microcomputer system counting square wave number, in addition time reference just can calculate distance, speed, acceleration/accel easily.
During elevator motion, due to problems such as vibrations and sensor manufacturing process, total containing suitable humorous wave excitation in actual sensor signal, and with the DC component that waveform twists.Although sensor has considered when manufacturing and has jolted and have employed special light path design, the beam center incided on the photosensitive bar of every bar is made to be strictly parallel to lens primary optical axis, even if object distance changes, the centre distance of the disc of confusion that focal plane produces is constant all the time, but the noise of signal and changes in amplitude are still larger.This signal can must be used by microcomputer system by after modulate circuit process.
DC component in signal is removed by 20Hz-20KHz bandpass filter by sensor signal, and by the interference rejection outside band due to image and the reason such as to jolt, the changes in amplitude of signal is very large, and restrict margin amplifying level makes low level signal amplification, large-signal amplitude limit, prevents dropout.
Claims (2)
1. an escalator monitoring device, it is characterized in that: driving circuit drives mair motor motion, the output shaft of mair motor connects the fifth wheel with coder, coder by the electric machine rotation Signal transmissions that monitored by fifth wheel on PG card, PG card outputs on elevator control panel after being processed by the signal of the coder of different output form, the signal of binding time parametric t process is converted into speed parameter v1 by elevator control panel, pass through CAN, be transferred on sedan-chair top board, sedan-chair top board passes through data bus connection, being real-time transmitted to by this speed parameter v1 is arranged on the telltale of cab interior, this device is also provided with optical detection module, it is arranged on outside lift car, car displacement parameter s can be obtained, this car displacement parameter s is real-time transmitted to and controls on its micro controller system by optical detection module, by the time parameter t of micro controller system self crystal oscillator, calculate the real-time speed parameter v2 of this elevator, speed parameter v2 is transferred to elevator control panel, itself and the speed parameter v1 that self calculated by code device signal are compared by elevator control panel, if difference is at tolerance interval, data are effective, checking coder effectively works, and elevator is working properly, optical detection module forms one by illuminating lamp (7), lens (12), pectination photoelectric device (10), aperture dividing plate (11), amplifier (9) and outer casing stand (6), light beam is launched by illuminating lamp, impinge upon on object (8), its reflected light scioptics (12) enter in detecting head, after aperture dividing plate, imaging is on dressing photoelectric device, form signal after amplifier (9) process, transfer on micro controller system, wherein detecting head is vertical with object (8) surface, and illuminating lamp and detecting head are acute angle, the multiple photosensitive bar that pectination photoelectric device (10) is made up of silicon photodiode array detector, connects into two groups, symmetrically alternate pectination arrangement.
2. a kind of escalator monitoring device as claimed in claim 1, it is characterized in that: the car run in hoistway is by wirerope (2) traction, this wirerope (2) is driven by electrical motor (1), and this electrical motor (1) is provided with drive pulley; Indicia band (4) is equipped with in the side of hoistway, car is then equipped with optical detection module (3), and indicia band (4) reflex-reflective material makes, and each indicia band width is different.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310532652.5A CN103538982B (en) | 2013-11-01 | 2013-11-01 | A kind of escalator monitoring device |
| PCT/CN2014/079740 WO2015062280A1 (en) | 2013-11-01 | 2014-06-12 | Elevator monitoring device |
| DE202014010508.1U DE202014010508U1 (en) | 2013-11-01 | 2014-06-12 | Elevator monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310532652.5A CN103538982B (en) | 2013-11-01 | 2013-11-01 | A kind of escalator monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103538982A CN103538982A (en) | 2014-01-29 |
| CN103538982B true CN103538982B (en) | 2016-02-24 |
Family
ID=49962912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310532652.5A Active CN103538982B (en) | 2013-11-01 | 2013-11-01 | A kind of escalator monitoring device |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN103538982B (en) |
| DE (1) | DE202014010508U1 (en) |
| WO (1) | WO2015062280A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103538982B (en) * | 2013-11-01 | 2016-02-24 | 苏州德奥电梯有限公司 | A kind of escalator monitoring device |
| CN107572332A (en) * | 2017-09-15 | 2018-01-12 | 广西建工集团建筑机械制造有限责任公司 | A kind of building hoist state feedback control system |
| CN107986119A (en) * | 2017-12-18 | 2018-05-04 | 广东卓梅尼技术股份有限公司 | A kind of apparatus for controlling elevator for possessing external memory |
| EP3650387A1 (en) * | 2018-11-06 | 2020-05-13 | Otis Elevator Company | System and method for displaying safety related data |
| CN113979260B (en) * | 2021-10-27 | 2023-06-02 | 日立楼宇技术（广州）有限公司 | Elevator overspeed protection method, device, equipment and storage medium |
| CN114604707A (en) * | 2022-03-29 | 2022-06-10 | 河南经贸职业学院 | Elevator operation monitoring method |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR900001962B1 (en) * | 1985-10-30 | 1990-03-27 | 미쓰비시전기 주식회사 | Control devices of display of elevator |
| JP3206967B2 (en) * | 1992-07-28 | 2001-09-10 | 三菱電機株式会社 | Elevator display device |
| JPH09208143A (en) * | 1996-02-07 | 1997-08-12 | Hitachi Ltd | Operation control method for elevator to be driven by linear motor |
| US7040459B2 (en) * | 2002-04-12 | 2006-05-09 | Mitsubishi Denki Kabushiki Kaisha | Elevator display system and method |
| KR20040011622A (en) * | 2002-07-27 | 2004-02-11 | 권재현 | An odomater for elevator system |
| JPWO2008004300A1 (en) * | 2006-07-06 | 2009-12-03 | 三菱電機株式会社 | Elevator display |
| EP1894874A1 (en) * | 2006-08-31 | 2008-03-05 | Inventio Ag | Safety device for an elevator |
| CN101450762B (en) * | 2007-12-06 | 2010-10-13 | 中国恩菲工程技术有限公司 | Monitoring apparatus for lifting machine |
| CN102159483A (en) * | 2008-10-17 | 2011-08-17 | 三菱电机株式会社 | Elevator monitoring system |
| CN101633460A (en) * | 2009-05-22 | 2010-01-27 | 苏州新达电扶梯部件有限公司 | Elevator display device |
| CN101723213B (en) * | 2009-12-25 | 2012-11-21 | 上海永大吉亿电机有限公司 | SinCos coder based method for detecting position and speed |
| CN101875458A (en) * | 2010-07-07 | 2010-11-03 | 四川润智兴科技有限公司 | Elevator speed-measuring and positioning method and device |
| JP5526092B2 (en) * | 2011-09-06 | 2014-06-18 | 株式会社日立製作所 | Electronic elevator |
| CN202358784U (en) * | 2011-10-27 | 2012-08-01 | 沈金根 | Elevator control device with automatic reposition function |
| CN202936049U (en) * | 2012-11-30 | 2013-05-15 | 江南嘉捷电梯股份有限公司 | Lift speed measuring device |
| CN103253576B (en) * | 2013-04-28 | 2016-04-20 | 广州日滨科技发展有限公司 | Elevator car speed monitored control system |
| CN203624747U (en) * | 2013-10-08 | 2014-06-04 | 苏州德奥电梯有限公司 | Elevator running speed in-car display device |
| CN103538982B (en) * | 2013-11-01 | 2016-02-24 | 苏州德奥电梯有限公司 | A kind of escalator monitoring device |
-
2013
- 2013-11-01 CN CN201310532652.5A patent/CN103538982B/en active Active
-
2014
- 2014-06-12 WO PCT/CN2014/079740 patent/WO2015062280A1/en active Application Filing
- 2014-06-12 DE DE202014010508.1U patent/DE202014010508U1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE202014010508U1 (en) | 2015-11-03 |
| WO2015062280A1 (en) | 2015-05-07 |
| CN103538982A (en) | 2014-01-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103538982B (en) | A kind of escalator monitoring device | |
| EP2583928B1 (en) | Elevator system | |
| RU2369554C2 (en) | Monitoring lift status | |
| CN102666341B (en) | Method and device for determining the movement and/or the position of an elevator car | |
| KR101334712B1 (en) | Over-acceleration and over-speed detection and processing system | |
| CN1795137B (en) | Emergency stop device of elevator | |
| CN101023016B (en) | Measuring strip and system for determining the motion of a moving object | |
| CN104860148B (en) | Elevator device | |
| EP1602610A1 (en) | Elevator supervision | |
| US11242220B2 (en) | Safety braking systems for elevators | |
| CA2543848A1 (en) | Elevator apparatus | |
| CN107879229B (en) | Safe intelligent home elevator | |
| US11591183B2 (en) | Enhancing elevator sensor operation for improved maintenance | |
| CN104822614A (en) | Elevator device | |
| CN101226111A (en) | Test experimental equipment of rope-breaking protective equipment for cradle safety lock and wire rope elevator | |
| CN108059048A (en) | The detection early warning system and method for early warning of a kind of elevator brake | |
| CN111285222B (en) | Elevator safety actuator system | |
| CN202542667U (en) | Escalator or moving sidewalk safety protecting device | |
| CN212832218U (en) | Elevator car position detection device | |
| CN106185526B (en) | Lift appliance | |
| CN210001366U (en) | roller speed measuring device | |
| CN102815584B (en) | Achieve the safe operation type controller for elevator of electronization | |
| CN101602458A (en) | Elevator device based on electronic safety tongs | |
| CN201411297Y (en) | Elevator device based on electronic safety tongs | |
| CN101602460A (en) | Elevator brake device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |