CN101301977A - Elevator - Google Patents
Elevator Download PDFInfo
- Publication number
- CN101301977A CN101301977A CNA2008100956715A CN200810095671A CN101301977A CN 101301977 A CN101301977 A CN 101301977A CN A2008100956715 A CNA2008100956715 A CN A2008100956715A CN 200810095671 A CN200810095671 A CN 200810095671A CN 101301977 A CN101301977 A CN 101301977A
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- China
- Prior art keywords
- speed
- elevator
- setting speed
- lift car
- brake equipment
- 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.)
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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
- B66B5/02—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
- B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
- B66B1/32—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on braking devices, e.g. acting on electrically controlled brakes
Abstract
An elevator has a first setting speed that is set according to a position of an elevator car (70) and a second setting speed that is set higher than the first setting speed wherein a first brake device (11) is actuated when a speed of the car (70) becomes higher than the first setting speed and a second brake device (13) is actuated when the speed of the car (70) becomes higher than the second setting speed. The elevator further has a third setting speed that is set higher than the second setting speed; and a vibration detector (8) that detects a change in the speed of the car (70) when the speed of the car (70) exceeds the first setting speed and the first brake device (11) is actuated wherein the second brake device (13) is actuated based on the change in the speed of the car (70) and on the second setting speed or the third setting speed.
Description
Technical field
The present invention relates to make when a kind of car speed at elevator reaches abnormal speed the drg action, thus the elevator that lift car is stopped.
Background technology
In existing elevator, the defence measure as when having taken place that fault causes elevator to stop when the speed of elevator has surpassed command speed, makes the action of drg (electrical motor drg) and mechanical type emergency braking apparatus, thereby elevator is stopped.In addition, as the defence measure when drg and emergency braking apparatus can't make elevator stop, energy disperser has been installed in the bottom of hoist trunk.Because the size of energy disperser must be set according to the command speed of elevator, so, when the command speed of elevator improves, also have to correspondingly increase energy disperser, at this moment, will cause the length lengthening of hoist trunk.
In order to address the above problem, a kind of scheme is for example disclosed in patent documentation 1, its position according to lift car correspondingly changes the speed that drg and emergency braking apparatus are started, speed when colliding with the energy disperser that reduces lift car and hoist trunk bottom, and with this length of dwindling energy disperser and shortening hoist trunk.
In addition, for example disclose a kind of scheme in patent documentation 2, it moves under unnecessary situation for fear of brake equipment, is designed to be able to change the criterion of overrunning according to the position of lift car.
Patent documentation 1: No. 2004/031064 communique of international publication
Patent documentation 2: No. 2004/028947 communique of international publication
In above-mentioned prior art, along with the position of lift car near the orlop building, electrical motor just can be started under lower elevator speed with drg (as the dynamo-electric brake of the 1st brake equipment) and emergency braking apparatus (as the mechanical brake of the 2nd brake equipment), and the elevator speed participant that can cause drg to start causes the velocity contrast between the elevator speed that emergency braking apparatus starts to dwindle.For this reason, may occur receiving instruction back to its actual time difference till beginning to move because of drg, before the drg action, elevator will reach the speed that emergency braking apparatus is started, thereby make and only need make the drg action just can make under the situation that lift car stops the problem that emergency braking apparatus is moved original.
In addition, because the speed of drg and emergency braking apparatus startup is diminished, when vibration etc. had taken place lift car, elevator reached the speed that can cause the emergency braking apparatus startup easily and causes the emergency braking apparatus action.For this reason, emergency braking apparatus may take place move under the situation that does not need its action originally, thus the problem that guide rail is sustained damage.
Summary of the invention
The objective of the invention is to solve existing problem in the above-mentioned prior art, for this reason, the invention provides a kind of elevator brake system, this elevator brake system can reduce brake shoe for elevator emergency stop and move under unnecessary situation, thereby can shorten the length of hoist trunk.
To achieve these goals, elevator of the present invention has corresponding to along the 1st setting speed of the set positions of guide rail lift car of lifting in hoist trunk and be set to the 2nd setting speed greater than described the 1st setting speed, when the speed of described lift car has surpassed described the 1st setting speed, the action of the 1st brake equipment, and when the speed of described lift car has surpassed described the 2nd setting speed, the action of the 2nd brake equipment, this elevator further has: be set at the 3rd setting speed more than described the 2nd setting speed, and be used for that speed at described lift car has surpassed the 1st setting speed and the vibrating detector that causes detecting under the situation of the 1st brake equipment action the velocity variations of described lift car makes variation and described 2nd setting speed of described the 2nd brake equipment according to described elevator car speed, perhaps the variation of described elevator car speed and described the 3rd setting speed move.
According to the present invention, because can be after dynamo-electric brake action as the 1st brake equipment, according to elevator car position and setting speed, judge whether and only elevator to be stopped by dynamo-electric brake, and make as the action of the emergency braking apparatus of the 2nd brake equipment according to judged result, therefore, can avoid emergency braking apparatus under unnecessary situation, to move and guide rail is sustained damage, thereby can shorten the length of hoist trunk.
Description of drawings
Fig. 1 is the integrally-built diagram of block in expression an embodiment of the present invention.
Fig. 2 be expression in one embodiment with diagram of curves corresponding each setting speed of elevator car position.
Fig. 3 is the diagram of curves that the expression elevator car speed changes.
Fig. 4 is the diagram of block of the vibration analysis part of the elevator car speed in the embodiment.
Fig. 5 is the diagram of curves of the filter characteristic of the vibrating detector in expression one embodiment.
Fig. 6 is the diagram of curves of the waveform after the filter process of representing in the embodiment.
Fig. 7 is the action flow chart of an embodiment.
Fig. 8 is the integrally-built diagram of block of other embodiment of expression.
Fig. 9 represents the action flow chart of other embodiment.
Among the figure:
1 elevator car position detector
2 elevator car speed detectors
3 the 1st setting speed makers
4 the 2nd setting speed makers
5 the 3rd setting speed makers
6 comparators
8 vibrating detectors
10 the 1st brake equipment controllers
11 the 1st brake equipments
12 the 2nd brake equipment controllers
13 the 2nd brake equipments
The specific embodiment
Fig. 1 represents the constructional drawing of elevator brake system.
The last figure of Fig. 1 is the elevator scheme drawing, and as shown in the figure, lift car 70 is along guide rail 75 lifting in hoist trunk.Be connected with rope sheave 76 and the 1st brake equipment 11 on the electrical motor 73.Hoist cable 77 volumes hang on the rope sheave 76, and the two ends of hoist cable 77 are suspended lift car 70 and counterbalanced weight 78 respectively in midair.The 2nd brake equipment 13 is installed in the lift car 70.In lift car 70 and motor portion 73, be provided with the sensor 71,72 of the position that is used for detecting lift car 70 and speed etc.In addition, be provided with the 1st not shown brake equipment controller 10 and the 2nd brake equipment controller 12, the 1 brake equipment controllers 10 and the 2nd brake equipment controller 12 in the control setup 74 and make the 1st brake equipment 11 and 13 actions of the 2nd brake equipment according to information from sensor 71,72.
Elevator car position detector 1 is used for measuring the position of lift car, and this detector for example is the coder on being installed in electrical motor and governor sheave etc. and is installed in the device that reads data the sign in the hoist trunk.Elevator car speed detector 2 is used for detecting the speed of lift car in travelling, this elevator car speed detector 2 calculates the speed of lift car in travelling according to the signal that is installed in the coder on electrical motor and the governor sheave etc., perhaps calculates the speed of lift car in travelling according to the signal of the reading device output that the sign of installing at certain intervals in the hoist trunk is read.
The 1st setting speed maker 3 is according to the elevator cage operation velocity mode that is generated, set ratio and the bigger velocity amplitude of the corresponding running velocity of a certain elevator car position, the 2nd setting speed maker 4 generates sets the bigger speed of speed that is generated than the 1st setting speed maker 3 for, and the 3rd setting speed maker 5 generates the bigger speed of speed that is generated than the 2nd setting speed maker 4 of setting for.
6 pairs of comparators are by elevator car position detector 1 detected elevator car position, compared in the speed at a certain elevator car position place and the lift car setting speed that is generated by the 1st setting speed maker 3 by elevator car speed detector 2 detected lift cars, when elevator car speed surpasses the 1st setting speed, to the 1st brake equipment controller 10 output signals, make 11 actions of the 1st brake equipment.
7 pairs of elevator car positions of comparator, elevator car speed and the lift car setting speed that is generated by the 2nd setting speed maker 4 compare.9 pairs of elevator car positions of comparator, elevator car speed and the lift car setting speed that is generated by the 3rd setting speed maker 5 compare.
In order to detect the variation of elevator car speed, more specifically to say so and whether vibration has taken place in order to detect lift car, vibrating detector 8 extracts oscillating component from the signal of elevator car speed detector 2.The 2nd brake equipment controller 12 drives the 2nd brake equipment 13 according to the output of comparator 7, comparator 9 and vibrating detector 8.
Followingly the fundamental operation of brake equipment is described according to Fig. 2.
Fig. 2 represents the example by the setting speed pattern of the 1st setting speed maker the 3, the 2nd setting speed maker 4 and 5 generations of the 3rd setting speed maker, when lift car from lowest floor when uppermost storey moves, perhaps from uppermost storey when lowest floor moves, the target velocity of the lift car target velocity 20 that is set to shown in dotted line.
Make the 1st setting speed 21 that starts with drg as the electrical motor of the 1st brake equipment be set to velocity amplitude, and the 2nd setting speed 22 is set to the velocity amplitude greater than the 1st setting speed 21 greater than target velocity 20.
Specifically, be that the 2nd setting speed 22 is set at the value that satisfies following formula 1, make electrical motor with can before lift car and the energy disperser that is positioned at the hoist trunk bottom come in contact, lift car being stopped after the drg action.
In the formula 1, V
2Represent the 2nd setting speed, a
bThe mean deceleration of expression electrical motor when move with drg, h are represented the elevator car position of starting at from the upper surface that is arranged on the energy disperser bottom the hoist trunk, and α represents rich amount speed.
The 3rd setting speed 23 is configured to the value bigger than the 2nd setting speed 22, can before lift car and the energy disperser that is positioned at the hoist trunk bottom come in contact lift car be stopped after making the emergency braking apparatus action, the 3rd setting speed 23 be set to and satisfies following formula 2.
In the formula 2, V
3Represent the 3rd setting speed, a
sMean deceleration during the action of expression emergency braking apparatus, β represents rich amount speed.In the 2nd setting speed 22 and the 3rd setting speed 23, the value that will become constant speed is set at 1.4 times of constant speed line of lift car target velocity 20.
Can be according to from whether including big oscillating component in the signal of elevator car speed detector 2, change the setting speed that makes as the action of the emergency braking apparatus of the 2nd brake equipment.For example, skid because of hoist cable, the braking force deficiency of hoist cable fracture or the 1st brake equipment etc. is former thereby when causing elevator car speed to increase, do not comprise big oscillating component in this signal, and when causing lift car that very big rocking taken place, then can comprise big oscillating component in the elevator car speed signal because of the fierceness action in the lift car etc.
And, skidding because of hoist cable or hoist cable fracture etc. is former thereby when causing that elevator car speed increases, be necessary to make immediately emergency braking apparatus action as the 2nd brake equipment, and iff being when waiting the vibration that causes lift car to increase owing to fierce action, then will restrain soon, so not necessarily need to make the emergency braking apparatus action owing to this vibration.
The signal of elevator car speed detector 2 is inputed in the vibrating detector 8 wherein whether include big oscillating component to judge.If do not comprise big oscillating component, then when elevator car speed surpasses the 2nd setting speed, make the action of the 2nd brake equipment.When in the signal that is judged as elevator car speed detector 2, including big oscillating component, then when the speed of lift car surpasses the 3rd setting speed, make the action of the 2nd brake equipment.
Analyze by occurrence cause the abnormal speed of lift car, judge that this abnormal speed is because hoist cable skids, hoist cable fracture or electronic braking force deficiency with drg etc. cause, still be because the big vibration of the generations such as fierceness action in the lift car causes, and set the speed that makes the 2nd brake equipment action according to judged result, can under the situation that only need make electrical motor lift car be stopped, limiting the emergency braking apparatus action, thereby can shorten the length of hoist trunk with the drg action.
Below to how analyzing the method that whether includes oscillating component in the elevator car speed describe.
Velocity wave form when causing that because of fierceness action of passenger etc. lift car rocks is shown in the curve 24 of Fig. 3.When the eigentone of time of rocking and lift car is close, shown in curve 24, big vibration can take place.
Because of hoist cable skids, velocity wave form when hoist cable fracture or electrical motor cause the elevator car speed increase with the braking force deficiency of drg etc. is for example shown in the curve 25 of Fig. 3.In order to distinguish this waveform of 2 types, the signal of elevator car speed detector 2 is input in the vibrating detector shown in Figure 48.
Vibrating detector 8 is made of filter 8a and determining device 8b.The oscillating component value of difference between minimum value when representing that by filter 8a extraction the signal of elevator car speed detector 2 changes and the maxim.Oscillating component value and the threshold value that configures in advance in the 8b of judgment part are compared, if this oscillating component value is greater than threshold value, then expression has oscillating component, this moment abnormal speed is judged as because fierce action etc. cause, if this oscillating component value less than threshold value, then is judged as abnormal speed is because hoist cable skids, hoist cable fracture or electrical motor cause with brake braking force deficiency etc.
Fig. 5 represents an example of the characteristic of filter 8a, wherein the gain characteristic of 26 expression filters.When the eigentone of the frequency component of external interference source and lift car system was close and produces resonance effect, lift car can produce big vibration.Therefore, preferably the gain with filter 8a is set at 1.0 near the eigentone of lift car system, and the gain setting of general's frequency band in addition becomes less gain.In addition, owing to the eigentone of lift car system can change along with the variation of charge capacity and sling length etc., so, for fear of the influence that is subjected to this variation, at least at eigentone f from minimum
1To maximum eigentone f
2Till scope in be 1.0 with the gain setting of filter 8a.
Fig. 6 is the scheme drawing that waveform 24,25 processes of presentation graphs 3 have the filtered result of filter 8a of characteristic 26 shown in Figure 5.Extract the situation of oscillating component after the waveform 24 process filter 8a filtering of waveform 27 presentation graphs 3 of Fig. 6, and almost do not had the situation of output after the waveform 25 process filter 8a filtering of waveform 28 presentation graphs 3 of Fig. 6.
Estimate by setting threshold as shown in Figure 6 and to the amplitude of vibrational waveform, can judge in the signal of elevator car speed detector 2 whether include oscillating component.As determination methods, be that example is described in this method of judging with the employing amplitude, but also can judge according to the area of waveform.After the action of the 1st brake equipment, add the absolute value of waveform, when addition calculated value surpassed threshold value, being judged as was because passenger's caused abnormal speeds such as fierceness action.In addition, also can carry out FFT (fast Fourier transform) processing by signal and extract oscillating component elevator car speed detector 2.Handle frequency and the power spectrum can know outstanding oscillating component by FFT, thus in the frequency of outstanding oscillating component near eigentone, and power spectrum is when bigger than threshold value, being judged as is because caused abnormal speeds such as fierce actions.
Fig. 7 represents the overall flow of above explanation.
Behind the destination floor of having set lift car, generate the elevator cage operation pattern in step 30, in step 31, generate the 1st, the 2nd and the 3rd setting speed pattern afterwards according to the operational mode that in step 30, generates.After lift car begins to move, the position and the speed of lift car is detected, with monitor whether taken place unusual.
In step 33, whether surpassed the 1st setting speed by the speed that monitors lift car and judged whether to have taken place unusually, when the speed of lift car has surpassed the 1st setting speed, the 1st brake equipment is moved.
After the action of the 1st brake equipment, continue the position and the speed of lift car are monitored (step 35), and in step 36, analyze in the elevator car speed whether include oscillating component.
When not comprising the big oscillating component of numerical value than prior setting (step 37), judge in step 38 whether the lift car acceleration/accel has reached the 2nd setting speed, if do not reach, then in step 35, continue the position and the speed of lift car are monitored, if reached the 2nd setting speed, make the action of the 2nd brake equipment.
Include big oscillating component if in step 37, be judged as, then when elevator car speed does not reach the 3rd setting speed, return step 35, and if when having reached the 3rd setting speed, then make the action of the 2nd brake equipment.
Fig. 8 represents other embodiment, below this other embodiment is described.
Detect the acceleration/accel of lift car, and utilize detected information Control the 2nd brake equipment 13.When detecting the acceleration/accel of lift car, the acceleration/accel Magnetric pickup that uses as acceleration detector 40 for example can be installed on lift car, and calculate the acceleration/accel of lift car according to the signal of elevator car speed detector 2.
After reaching the 1st setting speed because of elevator car speed and causing the action of the 1st brake equipment 11, by utilizing the acceleration information of lift car, can promptly detect the unusual acceleration of the lift car that causes owing to the hoist cable fracture, if acceleration/accel continues to increase, then make the action of the 2nd brake equipment, lift car is stopped.
Fig. 9 represents overall flow, and the flow process with Fig. 7 till the step 54 is identical.
In step 54, after 11 actions of the 1st brake equipment, monitor position, speed and the acceleration/accel (step 55) of lift car, when the acceleration/accel of lift car has reached the numerical value that configures in advance when above, carry out the vibration analysis (step 57) of elevator car speed, if do not detect the above oscillating component of setting value, then make the action of the 2nd brake equipment, if when having detected the oscillating component more than the setting value, then enter step 60, when elevator car speed reaches the 3rd setting speed, make the action of the 2nd brake equipment.
Claims (8)
1. elevator, this elevator has corresponding to along the position of guide rail lift car of lifting in hoist trunk and the 1st setting speed of setting and be set to the 2nd setting speed greater than described the 1st setting speed, when the speed of described lift car has surpassed described the 1st setting speed, the action of the 1st brake equipment, and when the speed of described lift car has surpassed described the 2nd setting speed, the action of the 2nd brake equipment, this elevator also has:
Be set at the 3rd setting speed more than described the 2nd setting speed; And
Be used for speed at described lift car and surpassed the 1st setting speed and make the vibrating detector that detects the velocity variations of described lift car under the situation of the 1st brake equipment action,
Described the 2nd brake equipment is moved according to the variation of described elevator car speed and the variation and described the 3rd setting speed of described the 2nd setting speed or described elevator car speed.
2. elevator as claimed in claim 1 is characterized in that, described vibrating detector extracts the variation of oscillating component as described elevator car speed.
3. elevator as claimed in claim 1 is characterized in that, when the variation of described elevator car speed below threshold value and when having surpassed described the 2nd setting speed, makes the action of the 2nd brake equipment.
4. elevator as claimed in claim 1 is characterized in that, described vibrating detector extracts the variation of oscillating component as described elevator car speed, when described oscillating component surpasses threshold value, and when having surpassed described the 3rd setting speed, makes the action of the 2nd brake equipment.
5. elevator as claimed in claim 1 is characterized in that described vibrating detector sense acceleration is used as the variation of described elevator car speed.
6. elevator as claimed in claim 1, it is characterized in that, bottom at described hoist trunk is provided with energy disperser, described the 3rd setting speed is set, make when the speed of described lift car makes described the 2nd brake equipment move above described the 3rd setting speed, can make described lift car before the described energy disperser of contact, stop.
7. elevator as claimed in claim 1, it is characterized in that, be provided with energy disperser, described the 2nd setting speed is set in the bottom of described hoist trunk, make when described the 1st brake equipment moves, described lift car is stopped before the described energy disperser of contact.
8. elevator as claimed in claim 1 is characterized in that, described vibrating detector extracts the variation of oscillating component as described elevator car speed,
When threshold value is following, the 2nd brake equipment when surpassing described the 2nd setting speed, the speed of described lift car is moved at described oscillating component,
When described oscillating component surpasses threshold value, the 2nd brake equipment when surpassing described the 3rd setting speed, the speed of described lift car is moved.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007-124055 | 2007-05-09 | ||
| JP2007124055A JP4924191B2 (en) | 2007-05-09 | 2007-05-09 | Elevator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101301977A true CN101301977A (en) | 2008-11-12 |
| CN101301977B CN101301977B (en) | 2010-08-18 |
Family
ID=39616520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100956715A Expired - Fee Related CN101301977B (en) | 2007-05-09 | 2008-05-07 | Elevator |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1997766B1 (en) |
| JP (1) | JP4924191B2 (en) |
| CN (1) | CN101301977B (en) |
| AT (1) | ATE451320T1 (en) |
| DE (1) | DE602008000370D1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718100A (en) * | 2012-06-13 | 2012-10-10 | 中山市卓梅尼控制技术有限公司 | Early warning system for elevator fault and early warning method for elevator fault |
| CN102795521A (en) * | 2011-05-25 | 2012-11-28 | 株式会社日立制作所 | Elevator |
| CN102933480A (en) * | 2010-01-18 | 2013-02-13 | 通力股份公司 | Method for monitoring the movement of an elevator car, and an elevator system |
| CN106185526A (en) * | 2014-09-26 | 2016-12-07 | 株式会社日立制作所 | Lift appliance |
| CN108639892A (en) * | 2018-07-25 | 2018-10-12 | 厦门乃尔电子有限公司 | A kind of elevator car speed detecting system and method |
| CN110844729A (en) * | 2018-08-21 | 2020-02-28 | 奥的斯电梯公司 | Elevator monitoring using vibration sensors near the elevator machine |
| CN110844723A (en) * | 2018-08-20 | 2020-02-28 | 奥的斯电梯公司 | Active braking for immediate stop |
| CN112850405A (en) * | 2020-12-31 | 2021-05-28 | 重庆能源职业学院 | Elevator car vibration management system based on MEMS system |
| US20220002114A1 (en) * | 2018-10-30 | 2022-01-06 | Hitachi, Ltd. | Control system for elevator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5241623B2 (en) * | 2009-06-11 | 2013-07-17 | 株式会社日立製作所 | Elevator with safety device |
| JP6272199B2 (en) * | 2014-09-26 | 2018-01-31 | 株式会社日立製作所 | Elevator apparatus and electronic safety system inspection method for elevator apparatus |
| DE102016100533A1 (en) * | 2016-01-14 | 2017-07-20 | Thyssenkrupp Ag | Method for monitoring a first brake of a car of an elevator system |
| JP6627636B2 (en) * | 2016-04-22 | 2020-01-08 | フジテック株式会社 | Vibration abnormality detection device and elevator control system |
| CN106429697B (en) * | 2016-09-13 | 2018-09-28 | 江苏旭云物联信息科技有限公司 | A kind of Elevator safety precaution system |
| US11136220B2 (en) * | 2017-02-17 | 2021-10-05 | Mitsubishi Electric Corporation | Elevator device |
| EP3915921A1 (en) * | 2020-05-26 | 2021-12-01 | Otis Elevator Company | Emergency terminal stopping systems |
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| JPS58135075A (en) * | 1982-02-08 | 1983-08-11 | 三菱電機株式会社 | Reduction gear at terminal stair of elevator |
| JPH04169486A (en) * | 1990-10-31 | 1992-06-17 | Toshiba Corp | Safety alarm device for elevator |
| JP2614672B2 (en) * | 1990-11-22 | 1997-05-28 | 株式会社日立製作所 | Elevator tamper sway prevention device |
| JPH08113441A (en) * | 1994-10-14 | 1996-05-07 | Hitachi Building Syst Eng & Service Co Ltd | Abnormal vibration detector for elevator |
| KR100719659B1 (en) * | 2002-09-24 | 2007-05-17 | 미쓰비시덴키 가부시키가이샤 | Elevator safety system |
| WO2004031064A1 (en) | 2002-10-04 | 2004-04-15 | Hitachi, Ltd. | Elevator system |
| JP5084113B2 (en) * | 2005-04-19 | 2012-11-28 | 三菱電機株式会社 | Elevator device abnormality detection device |
| JP4705407B2 (en) * | 2005-05-13 | 2011-06-22 | 株式会社日立製作所 | Elevator control device |
-
2007
- 2007-05-09 JP JP2007124055A patent/JP4924191B2/en not_active Expired - Fee Related
-
2008
- 2008-05-07 CN CN2008100956715A patent/CN101301977B/en not_active Expired - Fee Related
- 2008-05-08 AT AT08008669T patent/ATE451320T1/en not_active IP Right Cessation
- 2008-05-08 DE DE602008000370T patent/DE602008000370D1/en active Active
- 2008-05-08 EP EP08008669A patent/EP1997766B1/en not_active Not-in-force
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102933480A (en) * | 2010-01-18 | 2013-02-13 | 通力股份公司 | Method for monitoring the movement of an elevator car, and an elevator system |
| CN102933480B (en) * | 2010-01-18 | 2015-09-30 | 通力股份公司 | For monitoring method and the elevator device of the motion of lift car |
| CN102795521A (en) * | 2011-05-25 | 2012-11-28 | 株式会社日立制作所 | Elevator |
| CN102795521B (en) * | 2011-05-25 | 2015-07-22 | 株式会社日立制作所 | Elevator |
| CN102718100A (en) * | 2012-06-13 | 2012-10-10 | 中山市卓梅尼控制技术有限公司 | Early warning system for elevator fault and early warning method for elevator fault |
| CN106185526A (en) * | 2014-09-26 | 2016-12-07 | 株式会社日立制作所 | Lift appliance |
| CN106185526B (en) * | 2014-09-26 | 2018-09-14 | 株式会社日立制作所 | Lift appliance |
| CN108639892A (en) * | 2018-07-25 | 2018-10-12 | 厦门乃尔电子有限公司 | A kind of elevator car speed detecting system and method |
| CN108639892B (en) * | 2018-07-25 | 2020-07-10 | 厦门乃尔电子有限公司 | Elevator car speed detection system and method |
| US11866295B2 (en) | 2018-08-20 | 2024-01-09 | Otis Elevator Company | Active braking for immediate stops |
| CN110844723A (en) * | 2018-08-20 | 2020-02-28 | 奥的斯电梯公司 | Active braking for immediate stop |
| CN110844729A (en) * | 2018-08-21 | 2020-02-28 | 奥的斯电梯公司 | Elevator monitoring using vibration sensors near the elevator machine |
| CN110844729B (en) * | 2018-08-21 | 2021-06-25 | 奥的斯电梯公司 | Elevator monitoring using vibration sensors near the elevator machine |
| US20220002114A1 (en) * | 2018-10-30 | 2022-01-06 | Hitachi, Ltd. | Control system for elevator |
| US11708242B2 (en) * | 2018-10-30 | 2023-07-25 | Hitachi, Ltd. | Control system for elevator |
| CN112850405A (en) * | 2020-12-31 | 2021-05-28 | 重庆能源职业学院 | Elevator car vibration management system based on MEMS system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE602008000370D1 (en) | 2010-01-21 |
| ATE451320T1 (en) | 2009-12-15 |
| JP2008280109A (en) | 2008-11-20 |
| EP1997766B1 (en) | 2009-12-09 |
| JP4924191B2 (en) | 2012-04-25 |
| EP1997766A1 (en) | 2008-12-03 |
| CN101301977B (en) | 2010-08-18 |
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