CN1771183A - Electromagnetic/ultrasonic roll-calling/answering (EURA) system for elevator positioning - Google Patents
Electromagnetic/ultrasonic roll-calling/answering (EURA) system for elevator positioning Download PDFInfo
- Publication number
- CN1771183A CN1771183A CN03826554.0A CN03826554A CN1771183A CN 1771183 A CN1771183 A CN 1771183A CN 03826554 A CN03826554 A CN 03826554A CN 1771183 A CN1771183 A CN 1771183A
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- signal
- emission
- ultrasonic
- ultrasonic signal
- wireless transceiver
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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
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/36—Means for stopping the cars, cages, or skips at predetermined levels
- B66B1/40—Means for stopping the cars, cages, or skips at predetermined levels and for correct levelling at landings
-
- 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
- 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
- B66B1/46—Adaptations of switches or switchgear
- B66B1/50—Adaptations of switches or switchgear with operating or control mechanisms mounted in the car or cage or in the lift well or hoistway
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
A positioning system for an elevator cab (37) includes transponder modules (10) having a unique ID for receiving a signal (39) and emitting an ultrasonic signal when the signal is equivalent to the unique ID with a determination of position based on the time duration of the signals.
Description
The field of the invention
The present invention relates to a kind of equipment and method of using ultrasonic and radio frequency (RF) signal to determine the position of moveable platform, more specifically say, relate to a kind of method that the elevator car position that wireless transceiver and emission-transponder module be in operation with measurement is set.
The explanation of correlation technique
Positioning reference system (PRS) is a component part of apparatus for controlling elevator, and it can provide rapid and precise measurement to the position of the elevator cage in the hoist-hole.Many existing P RS are to be foundation to be attached at coder on elevator motor, governor or the independent sheaves.These PRS can suffer the difference between coder reading and the actual position, and this difference is that the stretching owing to slip, rope, mechanical wear and/or the rocking of building in the subsystem cause.In order to reduce this difference, should fix and known illustrating landed the reference point of the actual position in floor and horizontal location and often proofreaied and correct according to some.Need to set up an aiming chip system that constitutes by aiming sheet reader (Vane reader) and some aiming sheets for this reason these reference points and checkout facility thereof are provided.Consider that this aiming chip system is simply functional, its cost efficiency is extremely low, because all will adorn an aiming sheet by the skilled worker on each floor in hoist-hole, each sheet needs 10 dollars of fee of materials, 0.5 hour set-up time, about 0.1 hour of adjustment time.In a word, in existing P RS, one of significant problem is exactly that cost performance is very low.
Because the shortcoming of existing PRS, people once researched and developed the ultrasonic RF identification of passive type (RF-ID) system of penetrating, and were called for short PURIS.But the PURIS system causes other problem.The wireless power supply that transmits by super sonic excitation-emission-responser inadequately for example.In addition, aerodynamic interference may reduce location usefulness significantly.
Above-mentioned two problems can both be solved technically.Can in rfid system, supply required electric power for first problem, can on each doorframe, use 4 emission-responsers (PURIS) to substitute 2 for second problem with RF.
Though this two solution reaches, they may spend manyly than what need, because first scheme need customize solid-state RFID, and alternative plan almost will be doubled the expense of the material of last construction system.Adopt wired supply electric power can easily solve first problem.But in the framework of PURIS, still can not solve second problem.
Therefore people need, and to be one all be high-precision cheaply localization method in material, installation and maintenance.
Summary of the present invention
Therefore, an object of the present invention is to provide a kind of equipment and method of using ultrasonic and RF signal to determine the position of a moveable platform.
Comprise according to position fixing system of the present invention: a plurality of respectively have emission-transponder module of unique ID (identifier) so that receive an electromagnetic signal with coding and launch a ultrasonic signal simultaneously as the ID of this coding and uniqueness etc.; One has every group of wireless transceiver module of at least one group wherein that is at least three ultrasonic signal receptors, for transmission to the electromagnetic signal of a few coding and receive said ultrasonic signal; Be used for determining launching the electromagnetic signal of said coding to the facility that receives the time length the said ultrasonic signal from these at least three ultrasonic receivers; And the facility of determining the position of said wireless transceiver module from said time length.
Equipment according to the position of measurement moveable platform of the present invention comprises: a plurality of emission-transponder modules, this module respectively have a RF receptor that is suitable for received code RF signal; A ultrasonic transmitter and a calculating unit that is suitable for launching ultrasonic signal; Comprise that also at least one is fixed on the wireless transceiver module on the moveable platform, this module respectively has a RF projector that is suitable for launching code RF signal; A plurality of ultrasonic receivers that are suitable for receiving ultrasonic signal; Thereby one is used for measuring a plurality of time movements that receive the time length the ultrasonic signal from launching code RF signal to a plurality of ultrasonic receivers and one and is used for handling the computing mechanism that a plurality of time lengths calculate the position.
Method according to the position of measurement moveable platform of the present invention comprises the following steps: to be provided with a plurality of wireless answering machine modules, so that receive a coding RF signal, and at the ultrasonic signal of position emission that is fixed; At least one wireless transceiver module is set so that launch a coding RF signal, and receives this ultrasonic signal with a plurality of ultrasonic receivers; Launch this coding RF signal, receive this coding RF signal and launch a ultrasonic signal as replying; Receive this ultrasonic signal with a plurality of ultrasonic receivers; Measure and a plurality ofly receive time length this ultrasonic signal to a plurality of ultrasonic receivers from launching this coding RF signal; Determine the position of this wireless transceiver module according to these time lengths.
Another method of movably moving the flat-bed position according to measurement of the present invention comprises the following steps: at least one wireless transceiver module is fixed on movably on the platform, and this module has a RF projector that is suitable for launching code RF signal; A plurality of ultrasonic receivers that are suitable for receiving ultrasonic signal; One is used for measuring a plurality of from launching this coding RF signal to the time movement of receiving the time length this ultrasonic signal; With a computing mechanism that is used for handling a plurality of time lengths; Comprise also a plurality of emission-transponder modules are separately positioned on the fixing position that this module has a RF receptor that is suitable for received code RF signal; A ultrasonic transmitter that is suitable for launching ultrasonic signal; With a calculating unit; Launch this coding RF signal from this radio transceiver module, so that by a reception in these a plurality of radio responder modules, and the starting time movement; With this coding of one in these a plurality of emission-transponder modules reception RF signal, and launch a ultrasonic signal as replying; Receive the ultrasonic signal of this emission with these a plurality of ultrasonic receivers; Utilize this time movement measure at least three from launching code RF information to the time length that receives with a plurality of ultrasonic receivers this ultrasonic signal; Utilize these positions that are fixed and these at least three time lengths of measuring to calculate the position of this moveable platform.
Brief Description Of Drawings
Fig. 1 is emission-transponder module of the present invention (transponder module).
Fig. 2 is wireless transceiver module of the present invention (transceiver module).
Fig. 3 is the preferred embodiment of EURA of the present invention system.
DETAILED DESCRIPTION OF THE PREFERRED
The present invention discloses a kind of electromagnetic/ultrasonic rotating disk and calls out/reply (EURA) system.
This EURA system is made of a plurality of emission-transponder modules and a wireless interface transmitting-receiving device module that is attached on the elevator car of one on best each floor.Used electromagnetic wave is that frequency of radio is radio frequency (RF) ripple in the disclosure of invention.But other electromagnetic waves such as microwave or light wave also can be used to realize notion of the present invention.Though this paper is with regard to elevator, the present invention is not limited to this, but can widely the EURA system be used on any movably platform.
Emission-transponder module of the present invention 10 shown in Fig. 1 is made up of ultrasonic transmitter 13 and a calculating unit 15 of a RF receptor 11, a narrow bundle cone angle.As described below, emission-transponder module will be installed in the same place of each doorframe sealing in advance along elevator hoistway.The electric wireline of emission-responser suitably is installed in the doorframe in advance.Here employed " installing in advance " means the installation of finishing in the hoist-hole outside.The ultrasonic transmitter 13 of this wireless answering module 10 will be installed into that all faces all make progress or be all downward, the faces direction of the sonac of ultrasonic transmitter in wireless transceiver that to state below will be opposite with the faces direction of this ultrasonic transmitter 13, and promptly all makes progress downwards or all.Here our supposition, emission-transponder module towards last, and wireless receipts connect facing down of device module.
This RF receptor 11 is received the signal of a preset frequency from this wireless transceiver module, its demodulation is extracted out coding and this coding is delivered to calculating unit 15, with this coding and the ID number comparison that is stored in the uniqueness in the calculating unit.The ID that this is unique or can pre-determine is acquired with special training mode by this emission-responser.Or by skilled worker's setting in this place.If should equate with this ID number by coding, this calculating unit will trigger projector 13 and make ultrasonic signal of its emission.Here supposition exists a power supply and can use for each emission-transponder module.
Distance between any two adjacent emission-responsers 10 is limited within the xm.This means one or more emission-transponder modules 10 should be installed in any two adjacent and between emission-transponder module 10 greater than xm.Because the floor gap distance is about 3.5m, have only some exception as high bottom or special sectors.Therefore, x can be set to 3.5.But x also can be any other distance that enough supplies the EURA system operation.Following will stating, this parameter will be used to set another parameter for wireless transceiver module 20 usefulness.
Wireless transceiver module of the present invention 20 shown in Fig. 2 is made of a plurality of ultrasonic receiver of two RF transmitter circuits 21, two groups 23,23 ' and two calculating unit that separates 25.These parts have drawn among the figure subsequently.In this preferred embodiment, adopting two groups of circuit is the redundancies that need for coding, and set of circuits is used for normal location and normal terminal shutdown feature (NTSD) function, and another group is used for emergency terminal shutdown feature (ETSD/ETSLD) function.Each compound ultrasonic receiver 23,23 ' all comprises two group 27 that shares with another receptor 23,23 ', 27 ', every group of each three sonac 28.Other the sensor Redundancy Design of using the less sensor of number but will increasing design complexity can also be arranged certainly.Distance in one group between two adjacent sensors 28 preferably is about 10m, but also can be less than this number.Distance Y between two groups can be provided by following formula:
Y＞X-Z
Wherein Z is that system parameter representative is in transmitter and receptor ultimate range between the two.Preferably Z is set to 3m or 2m or 1m.Less Z means less measurement and lags behind.The parameter Y that satisfies following formula can guarantee at any time, an emission-transponder module 10 is always arranged, and one group distance is less than Z in interior two the sonac groups of it and wireless transceiver module 20 27,27 '.
This wireless receiver module 20 can be installed in advance, also can be installed on the hoist-hole.Best, this wireless receiver module 20 is installed on the side of cage 37.
Only consider a group in the circuit 27,27 ' now.Every a predetermined time duration such as 10ms, this RF projector 21 is called out emission-transponder module 20 once.This time length can be any length, as long as enough to can easily carrying out the operation of EURA system.This calling is printed by calculating unit 25 constantly.How to determine which emission-responser 10 should be called out and will describe in detail afterwards.Speak briefly, will be called out by this wireless transceiver module 20 with that emission-transponder module 10 that this wireless transceiver module 20 is the most approaching.This logic is correct, because except the situation of electric power et out of order, this PRS can know the Position Approximate of this cage 37 and this emission-transponder module 10.
In case this wireless transceiver module 20 is called out emission-transponder module 10, it will wait for the arrival of ultrasonic signal on each sonac.The ultrasonic signal arrival on sensor therein each time all will be printed by calculating unit 25.
This calculating unit 25 utilizes these about calling out the position that just can calculate cage constantly with first three temporal information that arrives the earliest.Why this position calculation may be because the parameter of three the unknowns is arranged, i.e. the upright position of cage and level attitude and local speed of sound transmission, and we can obtain three independently equations from three sonacs.Note here since the communication and the hysteresis of calculating cause at the loss time memory a conclusive time deviation.In fact, important constraint will be set believing that an event horizon can assure success exactly within this boundary when realizing native system.
The final design of this EURA system is drawn in Fig. 3 in detail.The difference that please notes PURIS system and EURA system maximum again is, in the EURA system, this wireless transceiver 20 can be known the ID number of each emission-responser 10, and calls out an emission-responser 10 rather than call out emission-responser 10 more than one simultaneously with its ID number.
When operation, this EURA system plays following effect:
1. this wireless transceiver module 20 is known the position of preceding this cage of 10ms and the absolute location and the ID identifier of each emission-transponder module 10.
2. this wireless transceiver module 20 is called out emission-responser 10 near center-point between two group 27,27 ' sonac 28 by the RF radiofrequency signal 39 of a coding.This calling constantly is printed.
3. each emission-transponder module 10 is all constantly listened to this wireless transceiver module 10, with RF signal 39 decodings of any one uppick, and should encode and its ID comparison.If it is identical with its ID to encode, just triggers its ultrasonic transmitter 13 and make ultrasonic signal of its emission.
4. this wireless transceiver module detects and prints the time that this ultrasonic signal 35 arrives each sonac 28.
5. owing to use the printing of at least three times of advent, this wireless receiver just can calculate the position of this cage.This calculating can also can be compared complexity simply to as separating three simultaneous equationss.Have various echoes when for example leaving cage and/or hoistway wall when the ultrasonic signal collision.Can adopt corresponding Echo Canceling Method to reduce this interference.
Annotate: have under the situation of a plurality of lift times, each hoist-hole should have different RF and ultrasonic signal frequencies to disturb so that reduce any signal.
For NTSD and ETSD operation, emission-transponder module can be installed one every x/2m.So just, can guarantee to measure to lag behind and be reduced to original half.In the zone of NTSD and ETSD, two groups of circuit 27,27 ' run up times with 5ms differ from and carry out the normal locating procedure of political affairs.That is to say, call out emission-transponder module for one group when t=0, another group 27 ' is started working when t=5ms then.One group for NTSD with and another group is used for ETSD/ETSLD.By measuring the frequency migration that is caused by Doppler effect, or with the measurement differential of position, this wireless transceiver module can be calculated the moving velocity of this cage.
For position decided at the higher level but not officially announced, can emission-transponder module 10 be installed so that can detect the two ends in this special area earlier at the two ends in special area in special area.Emission-the responser 10 that is installed in the bottom comprises the ultrasonic transmitter of a long distance.Here suppose that its scope can cover whole special area.If can not, emission-transponder module 10 can be installed in this special area.
In case this cage 37 enters this area and through the emission-transponder module of position at special area one end, this wireless transceiver module 20 just relies on this length range transmission-transponder module 10 to locate.This wireless transceiver module 10 needs to wait for the long time until receive till ultrasonic the replying.Receive one reply after, it just can call out this emission-transponder module 10 again.
After a power failure as will recover the information of position, this wireless transceiver module 20 can be from the position begins to rotate in the module at hoist-hole top and calls out each emission-transponder module 10.Since all ultrasonic transmitters 13 this emission-transponder module 10 in all be assumed that towards on, so this wireless transceiver module 20 can not detect any one actv. ultrasonic 21 to arrive always 10 of the first emission-transponder modules in this wireless transceiver module 20 above till the first emission-transponder module, the 10 quilt callings under one group 27 the sonac 28.Owing to permissible time gate of replying is arranged, may have the additional faults allowance deviation of replying to undesirable.
In case the position in wireless transceiver module 20 above the first wireless reply device module 10 under one group of sonac 27 called out, this wireless transceiver module 20 just can recover the information of the existing position of this cage 37.
The result is, of the present inventionly can both provide split hair caccuracy, high position promptness rate to any one position measurement in the hoist-hole; Because the installation/adjusting work amount of hoist-hole seldom, only need lower installation/adjustment expense; Since simple in structure and do not have mechanical wear, do not need maintenance cost; Because the whole world is all applicable, only need lower overhead charges; And the operation of can not need proofread and correct.
Though this explanation is an example with vertical elevator traffic, it is equally applicable to general level and vertical conveying.
Though the present invention is described in detail with regard to specific embodiment, obviously those skilled in the art can make various alternative, modifications and variations after reading above-mentioned explanation.Therefore the present invention ought to comprise all these alternative, modifications and variations, as long as they are in the broad range that limits at appended claims.
Claims (15)
1. position fixing system comprises:
A plurality of emission-transponder modules that respectively have unique identifier are used for receiving the electromagnetic signal with coding, and launch a ultrasonic signal simultaneously when the identifier of said coding and said uniqueness etc.;
One has every group of wireless transceiver module of at least one group wherein that is at least three ultrasonic signal receptors, is used for launching said at least one coding electromagnetic signal, and receives said ultrasonic signal;
In order to determine the facility of the time length between the reception of the emission of said coding electromagnetic signal and said ultrasonic signal at least with said three ultrasonic signal receptors; And
In order to determine the facility of the position of said wireless transceiver module according to said time length.
2. the equipment of claim 1 is characterized in that said at least one wireless transceiver module is fixed on one movably on the platform.
3. the equipment of claim 2 is characterized in that said movably platform is an elevator.
4. the equipment of claim 1 it is characterized in that said aud. snl. is a ultrasonic signal, and said electromagnetic signal is a radiofrequency signal.
5. the equipment of claim 1 is characterized in that having every group of wherein two groups that are at least three ultrasonic receivers.
6. equipment of measuring the position of moveable platform comprises:
A plurality of emission-transponder modules, this module has:
A radio frequency receiver that is suitable for the received code radiofrequency signal;
A ultrasonic transmitter that is suitable for launching ultrasonic signal; And
A calculating unit: and
Be fixed at least one wireless transceiver module on the said moveable platform, this module has:
A radiofrequency launcher that is suitable for the launching code radiofrequency signal;
A plurality of ultrasonic receivers that are suitable for receiving ultrasonic signal;
One in order to measure the time movement of a plurality of time lengths that received by said a plurality of ultrasonic receivers from the said ultrasonic signal of being transmitted into of said coded radio frequency signal;
One in order to handle said a plurality of time length to calculate the computing mechanism of said position.
7. the equipment of claim 6 is characterized in that said movably platform is suitable for moving along a central axis.
8. the equipment of claim 6 is characterized in that said movably platform is an elevator.
9. the equipment of claim 4 is characterized in that said at least two said emission-transponder modules are installed on a plurality of doorframes.
10. the method for a definite position comprises the following steps:
A plurality of emission-transponder modules are set,, and on the position that is fixed, launch ultrasonic signal with the received code radiofrequency signal;
At least one wireless transceiver module is set,, and receives said ultrasonic signal with a plurality of ultrasonic receivers with the launching code radiofrequency signal;
Launch said coded radio frequency signal;
Receive said coded radio frequency signal, and launch a ultrasonic signal as replying;
Receive said ultrasonic signal with said a plurality of ultrasonic receivers;
Measure and a plurality ofly be transmitted into the time length that said ultrasonic signal is received by said a plurality of ultrasonic receivers from said coded radio frequency signal said, and
Determine the position of said wireless transceiver module according to said time length.
11. the method for claim 10 is characterized in that said emission-transponder module is fixed on one movably on the platform.
12. a method of measuring the position of moveable platform comprises the following steps:
At least one wireless receiver module is fixed on the said movably platform, and said wireless transceiver module has:
A radiofrequency launcher that is suitable for the launching code radiofrequency signal;
A plurality of ultrasonic receivers that are suitable for receiving ultrasonic signal;
A time movement, be used for measuring a plurality of at said coded radio frequency signal emission and the time length between the reception of said ultrasonic signal; And
A computing mechanism is used for handling said a plurality of time length;
A plurality of emission-transponder modules are separately positioned on the position that is fixed, and said emission-transponder module has;
A radio frequency receiver that is suitable for the received code radiofrequency signal;
A ultrasonic transmitter that is suitable for launching ultrasonic signal; And
A calculating unit; With
Launch said coded radio frequency signal so that by the said reception said a plurality of emission-transponder modules from said wireless transceiver module, and start a time movement;
With one in the said a plurality of emission-transponder modules said coded radio frequency signal of reception, and launch a ultrasonic signal as replying;
Receive the ultrasonic signal of said emission with said a plurality of ultrasonic receivers;
Utilize said time movement to measure at least three and receive time length between the said ultrasonic signal at the said coded radio frequency signal of emission with said a plurality of ultrasonic receivers; And
The said position that utilizes said be fixed position and said at least three measured time lengths to calculate said moveable platform.
13. the method for claim 12 is characterized in that the said step that said a plurality of emission-transponder modules are set is included in the building each layer said at least one emission-transponder module is set.
14. the method for claim 12 is characterized in that the said step that said a plurality of emission-transponder modules are set comprises along being parallel to the direction that said moveable platform moves the central axis on time institute edge said at least two emission-transponder modules are set.
15. the method for claim 12 is characterized in that said at least one step that is fixed on the wireless transceiver module on the said moveable platform that is provided with comprises said at least one wireless transceiver module is arranged on the elevator car.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2003/016936 WO2004108574A1 (en) | 2003-05-30 | 2003-05-30 | Electromagnetic/ultrasonic roll-calling/answering (eura) system for elevator positioning |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1771183A true CN1771183A (en) | 2006-05-10 |
| CN100482562C CN100482562C (en) | 2009-04-29 |
Family
ID=33509883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038265540A Expired - Fee Related CN100482562C (en) | 2003-05-30 | 2003-05-30 | Electromagnetic/ultrasonic roll-calling/answering (EURA) system for elevator positioning |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4505408B2 (en) |
| CN (1) | CN100482562C (en) |
| AU (1) | AU2003245352A1 (en) |
| HK (1) | HK1091797A1 (en) |
| WO (1) | WO2004108574A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113860100A (en) * | 2021-10-21 | 2021-12-31 | 杭州浙达精益机电技术股份有限公司 | Method and device for measuring absolute position of elevator car |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI120449B (en) * | 2008-08-12 | 2009-10-30 | Kone Corp | Arrangement and method for determining the position of the elevator car |
| CN102398808A (en) * | 2010-09-08 | 2012-04-04 | 谢君 | Elevator cage running information acquisition device and information processing method |
| US8576114B2 (en) * | 2011-06-24 | 2013-11-05 | Thales Canada Inc. | Location of a transponder center point |
| CN114803747B (en) * | 2021-01-29 | 2023-08-18 | 日立楼宇技术（广州）有限公司 | Positioning method and device for car, computer equipment and storage medium |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0474990A (en) * | 1990-07-16 | 1992-03-10 | Furuno Electric Co Ltd | Distance meter |
| US5306882A (en) * | 1991-05-13 | 1994-04-26 | Otis Elevator Company | Measuring elevator hoistway position using audible signals |
| JP3296896B2 (en) * | 1993-08-06 | 2002-07-02 | 綜合警備保障株式会社 | Moving object position measurement device |
| DE4426793C1 (en) * | 1994-07-28 | 1995-10-26 | Schmersal K A Gmbh & Co | Position measurement appts. for e.g. elevator or lift shaft |
| US5682024A (en) * | 1995-07-31 | 1997-10-28 | Otis Elevator Company | Elevator position determination |
| JPH10300849A (en) * | 1997-04-28 | 1998-11-13 | Kaijo Corp | Under-water position calculator, transponder and under-water position measuring device using both of them |
| JPH10338429A (en) * | 1997-06-05 | 1998-12-22 | Kajima Corp | Noncontact type device for detecting construction elevator landing at every floor |
| US5883345A (en) * | 1997-12-23 | 1999-03-16 | Otis Elevator Company | Sonic position measurement system |
| JP2000203772A (en) * | 1998-08-21 | 2000-07-25 | Inventio Ag | Device for generating hoistway information of elevator equipment |
| DE10133171C1 (en) * | 2001-07-07 | 2002-12-05 | Schmersal K A Gmbh & Co | Elevator position detection involves applying magnetic counter field after coupling in sound signal to compensate for residual magnetization resulting from input coupling of sound signal |
| CN1217842C (en) * | 2001-09-27 | 2005-09-07 | 三菱电机株式会社 | Lifter |
| US6554107B2 (en) * | 2001-09-27 | 2003-04-29 | Mitsubishi Denki Kabushiki Kaisha | Elevator system |
-
2003
- 2003-05-30 JP JP2005500611A patent/JP4505408B2/en not_active Expired - Fee Related
- 2003-05-30 CN CNB038265540A patent/CN100482562C/en not_active Expired - Fee Related
- 2003-05-30 AU AU2003245352A patent/AU2003245352A1/en not_active Abandoned
- 2003-05-30 WO PCT/US2003/016936 patent/WO2004108574A1/en active Application Filing
-
2006
- 2006-11-08 HK HK06112288.0A patent/HK1091797A1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113860100A (en) * | 2021-10-21 | 2021-12-31 | 杭州浙达精益机电技术股份有限公司 | Method and device for measuring absolute position of elevator car |
| CN113860100B (en) * | 2021-10-21 | 2023-03-03 | 杭州浙达精益机电技术股份有限公司 | Method and device for measuring absolute position of elevator car |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006526554A (en) | 2006-11-24 |
| AU2003245352A1 (en) | 2005-01-04 |
| JP4505408B2 (en) | 2010-07-21 |
| WO2004108574A1 (en) | 2004-12-16 |
| HK1091797A1 (en) | 2007-01-26 |
| CN100482562C (en) | 2009-04-29 |
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