CA2980636C - Elevator carriage positioning and encoding system and control method - Google Patents
Elevator carriage positioning and encoding system and control method Download PDFInfo
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- CA2980636C CA2980636C CA2980636A CA2980636A CA2980636C CA 2980636 C CA2980636 C CA 2980636C CA 2980636 A CA2980636 A CA 2980636A CA 2980636 A CA2980636 A CA 2980636A CA 2980636 C CA2980636 C CA 2980636C
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/02—Cages, i.e. cars
Abstract
An elevator carriage positioning and encoding system and control method. The positioning and encoding system comprises a single elevator control system (1), carriage control system (2), an encoding cable system (3), and a group control system (4). A sensing antenna container (3-2) on the carriage transmits a signal generated by an encoded address generator and having a specific frequency to an encoding cable (3-5) via electromagnetic coupling. The signal is transmitted over the encoding cable (3-5) arranged and intertwisted according to a gray code to provide an encoded address signal. An encoded address receiver is configured to receive the encoded address signal and decode the same. The positioning system employs the encoding cable system to implement various functions such as carriage positioning, operation speed monitoring, leveling control, rope-free speed limit protection, anti-carriage slipping protection, anti-cutting protection and terminal position limiting protection.
Description
Description ELEVATOR CARRIAGE POSITIONING AND ENCODING SYSTEM AND
CONTROL METHOD
I. Technical field The present invention relates to the elevator field, in particular to an elevator carriage encoding and positioning system, which is especially applicable to high-speed, ultra high-speed and long-travel elevators in underground ultra-deep mines and super high-rise buildings on the ground.
Background Art As people pursue higher quality of life increasingly, they have higher and higher requirements for elevators. Users expect that the elevators are more convenient and quicker, on the premise of safety.
Designers seek for elevator systems that are simpler and more reliable on the premise of meeting the requirements of the users. To ensure safe operation of elevators, elevator carriage positioning system, operation speed monitoring system, leveling control system, speed limiting system, anti-sliding protection system, anti-shearing protection system, terminal limit protection system and the like are added into elevator control systems. In the existing elevator systems, the additional systems described above are separate systems, and require a series of sensors distributed in every part of the elevator system. Each system requires separate acquisition modules, and the acquired signals are transmitted to a master control module in an elevator control cabinet. Consequently, the elevator control systems are bulky and complex, cause increased elevator construction cost, and have impacts on operating reliability of the elevators.
Most of traditional elevator positioning systems and elevator carriage operation speed monitoring systems employ rotary encoders. Usually, the rotary encoders can be mounted on the main shaft of the traction machine, and some encoders can be mounted on the main shaft of the speed governor, so as to obtain the current speed of the elevator through conversion from the rotation speed of the main shaft and then ascertain the position of the elevator by accumulation of the codes. Since the value in the positioning system is obtained through conversion and there are clearance between gears and relative slippage between belts, such a positioning method relatively involves some accumulative errors.
Most of traditional elevator leveling control systems employ a combined control by means of the photoelectric switches installed at destination landing and the rotary encoder installed on the main shaft of the traction machine, however, such a scheme can only realize deceleration on the basis of speed principle. If the brake on the traction machine takes actions when the elevator carriage reaches a destination landing and blocks the photoelectric switch, the speed of the elevator carriage will be reduced to zero suddenly, and the resultant braking acceleration will cause the passengers discomfortable. A traditional speed limiting system comprises a governor, safety gears, a governing rope, and a tensioning device. In a high-speed elevator system in a high-rise building, the governing rope may sway and cause incorrect action of the safety gears. Most of traditional anti-sliding protection systems and anti-shearing protection systems employ photoelectric switches, and their working principle is similar to that of leveling control. When the elevator carriage lands at a destination landing, the traction rope may slide in the rope groove of the traction sheave and result in movement of the elevator carriage; in addition, in extreme cases where the speed of the elevator carriage doesn't reach the speed for mechanical actions, the traditional systems are unable to trigger the safety gears to act and unable to accomplish anti-sliding protection and anti-shearing protection.
The terminal limit protection system employs limit switches. If the elevator carriage hits the ceiling or floor at a high speed, the limit switch will be triggered, and the safety gears will act immediately and the elevator carriage will be stopped suddenly, resulting in a high braking acceleration and causing severe harms to the passengers. In summary, all existing systems described above employ separate sensors, and the systems are complex and involve complicated control.
Consequently, the systems may be liable to fail and have impacts on elevator safety.
III. Contents of the Invention Technical problem: To solve the problems existing in the prior art, the present invention provides an elevator carriage encoding and positioning system and a control method, which can realize elevator carriage positioning, operation speed monitoring, leveling control, rope-free speed limit protection, anti-sliding protection, anti-shearing protection, and terminal limit protection, etc.
Technical scheme: The elevator carriage encoding and positioning system provided in the present invention comprises elevator positioning systems and a group control system connected to a main elevator controller in elevator shafts, wherein, the elevator positioning system comprises a single elevator control system in an elevator control cabinet, a carriage control system installed in an elevator carriage, and an encoding cable system connected to the single elevator control system and the carriage control system through a communication cable;
The single elevator control system comprises a main elevator controller and a wireless module I
connected to the main elevator controller through a communication cable;
The carriage control system comprises a carriage controller installed in the elevator carriage, and a display screen connected to the carriage controller through communication cables and a wireless module II, the carriage controller is connected to an electromagnet installed on the elevator carriage through a control cable, the electromagnet is connected to a link mechanism and connected via the link mechanism to safety gears arranged on the two sides of the elevator carriage near an elevator guide rail;
The encoding cable system comprises a start end container installed on the top of the elevator shaft, a terminal end container installed on the bottom of the elevator shaft, and an encoding cable that connects the start end container and the terminal end container, wherein, an encoded address receiver is provided at the start end container, and an encoded address generator and an induction antenna container are provided on the elevator carriage near the encoding cable;
The group control system comprises a communication bus connected to the main elevator controllers in the elevator shafts, and a group control module and landing calling modules connected to the communication bus, wherein, a monitoring module is provided on the group control module.
A control method for elevator carriage encoding and positioning utilizing the device described above comprises the following steps:
(1) elevator carriage encoding and positioning: the induction antenna container transmits a signal at a special frequency generated by the encoded address generator to the encoding cable through electromagnetic coupling, and the signal is then transmitted through the encoding cable to the encoded address receiver installed on the top of the elevator shaft, the signal is transmitted through the encoding cable arranged and intertwisted according to a Gray code scheme to form an encoded address signal, the encoded address receiver performs address decoding for the received encoded address signal, parses the address signal and transmits the address to the main elevator controller, the main elevator controller transmits the encoded address of the elevator carriage back to the carriage control system via the wireless module I, and the wireless module II receives the encoded address and transmits it to the carriage controller;
CONTROL METHOD
I. Technical field The present invention relates to the elevator field, in particular to an elevator carriage encoding and positioning system, which is especially applicable to high-speed, ultra high-speed and long-travel elevators in underground ultra-deep mines and super high-rise buildings on the ground.
Background Art As people pursue higher quality of life increasingly, they have higher and higher requirements for elevators. Users expect that the elevators are more convenient and quicker, on the premise of safety.
Designers seek for elevator systems that are simpler and more reliable on the premise of meeting the requirements of the users. To ensure safe operation of elevators, elevator carriage positioning system, operation speed monitoring system, leveling control system, speed limiting system, anti-sliding protection system, anti-shearing protection system, terminal limit protection system and the like are added into elevator control systems. In the existing elevator systems, the additional systems described above are separate systems, and require a series of sensors distributed in every part of the elevator system. Each system requires separate acquisition modules, and the acquired signals are transmitted to a master control module in an elevator control cabinet. Consequently, the elevator control systems are bulky and complex, cause increased elevator construction cost, and have impacts on operating reliability of the elevators.
Most of traditional elevator positioning systems and elevator carriage operation speed monitoring systems employ rotary encoders. Usually, the rotary encoders can be mounted on the main shaft of the traction machine, and some encoders can be mounted on the main shaft of the speed governor, so as to obtain the current speed of the elevator through conversion from the rotation speed of the main shaft and then ascertain the position of the elevator by accumulation of the codes. Since the value in the positioning system is obtained through conversion and there are clearance between gears and relative slippage between belts, such a positioning method relatively involves some accumulative errors.
Most of traditional elevator leveling control systems employ a combined control by means of the photoelectric switches installed at destination landing and the rotary encoder installed on the main shaft of the traction machine, however, such a scheme can only realize deceleration on the basis of speed principle. If the brake on the traction machine takes actions when the elevator carriage reaches a destination landing and blocks the photoelectric switch, the speed of the elevator carriage will be reduced to zero suddenly, and the resultant braking acceleration will cause the passengers discomfortable. A traditional speed limiting system comprises a governor, safety gears, a governing rope, and a tensioning device. In a high-speed elevator system in a high-rise building, the governing rope may sway and cause incorrect action of the safety gears. Most of traditional anti-sliding protection systems and anti-shearing protection systems employ photoelectric switches, and their working principle is similar to that of leveling control. When the elevator carriage lands at a destination landing, the traction rope may slide in the rope groove of the traction sheave and result in movement of the elevator carriage; in addition, in extreme cases where the speed of the elevator carriage doesn't reach the speed for mechanical actions, the traditional systems are unable to trigger the safety gears to act and unable to accomplish anti-sliding protection and anti-shearing protection.
The terminal limit protection system employs limit switches. If the elevator carriage hits the ceiling or floor at a high speed, the limit switch will be triggered, and the safety gears will act immediately and the elevator carriage will be stopped suddenly, resulting in a high braking acceleration and causing severe harms to the passengers. In summary, all existing systems described above employ separate sensors, and the systems are complex and involve complicated control.
Consequently, the systems may be liable to fail and have impacts on elevator safety.
III. Contents of the Invention Technical problem: To solve the problems existing in the prior art, the present invention provides an elevator carriage encoding and positioning system and a control method, which can realize elevator carriage positioning, operation speed monitoring, leveling control, rope-free speed limit protection, anti-sliding protection, anti-shearing protection, and terminal limit protection, etc.
Technical scheme: The elevator carriage encoding and positioning system provided in the present invention comprises elevator positioning systems and a group control system connected to a main elevator controller in elevator shafts, wherein, the elevator positioning system comprises a single elevator control system in an elevator control cabinet, a carriage control system installed in an elevator carriage, and an encoding cable system connected to the single elevator control system and the carriage control system through a communication cable;
The single elevator control system comprises a main elevator controller and a wireless module I
connected to the main elevator controller through a communication cable;
The carriage control system comprises a carriage controller installed in the elevator carriage, and a display screen connected to the carriage controller through communication cables and a wireless module II, the carriage controller is connected to an electromagnet installed on the elevator carriage through a control cable, the electromagnet is connected to a link mechanism and connected via the link mechanism to safety gears arranged on the two sides of the elevator carriage near an elevator guide rail;
The encoding cable system comprises a start end container installed on the top of the elevator shaft, a terminal end container installed on the bottom of the elevator shaft, and an encoding cable that connects the start end container and the terminal end container, wherein, an encoded address receiver is provided at the start end container, and an encoded address generator and an induction antenna container are provided on the elevator carriage near the encoding cable;
The group control system comprises a communication bus connected to the main elevator controllers in the elevator shafts, and a group control module and landing calling modules connected to the communication bus, wherein, a monitoring module is provided on the group control module.
A control method for elevator carriage encoding and positioning utilizing the device described above comprises the following steps:
(1) elevator carriage encoding and positioning: the induction antenna container transmits a signal at a special frequency generated by the encoded address generator to the encoding cable through electromagnetic coupling, and the signal is then transmitted through the encoding cable to the encoded address receiver installed on the top of the elevator shaft, the signal is transmitted through the encoding cable arranged and intertwisted according to a Gray code scheme to form an encoded address signal, the encoded address receiver performs address decoding for the received encoded address signal, parses the address signal and transmits the address to the main elevator controller, the main elevator controller transmits the encoded address of the elevator carriage back to the carriage control system via the wireless module I, and the wireless module II receives the encoded address and transmits it to the carriage controller;
2 (2) elevator carriage operation speed monitoring: the main elevator controller and the carriage controller carry out calculation to obtain the real-time operation speed of the elevator carriage according to a time-varying rule of the acquired encoded address of the elevator carriage;
(3) elevator leveling control: when the elevator carriage approaches to a destination landing, the main elevator controller will decelerate the elevator carriage on a distance basis according to the real-time position of the elevator carriage acquired by the encoding cable system and the speed of the elevator obtained through calculation, the position after adjustment of the elevator carriage will be fed back via the encoding cable system, and the speed of the traction machine will be controlled continuously to control the elevator carriage to land accurately and steadily at the destination landing;
(4) rope-free speed limit protection for the elevator: when the main elevator controller detects via the encoding cable system that the operation speed of the elevator carriage reaches a speed for electrical actions, the main elevator controller will make a response to stop the traction machine and decelerate the elevator carriage; when the carriage controller detects via the encoding cable system that the operation speed of the elevator carriage reaches a speed for mechanical actions, the carriage controller will make a response to de-energize the electromagnet, so that the electromagnet will act to drive the link mechanism on the elevator carriage to drive the safety gears to act and stop the elevator carriage;
(5) anti-sliding protection for the elevator: when the traction machine of the elevator is stopped, if the elevator carriage slides by accident, the carriage controller will make a response according to the position sliding of the elevator carriage acquired by the encoding cable system to drive the safety gears to act and stop the elevator carriage;
(6) anti-shearing protection for the elevator: when the elevator carriage lands at a destination landing and the door of the elevator carriage is not closed completely, if the traction machine starts to operate, the main elevator controller and the carriage controller will detect via the encoding cable system that the elevator carriage is out of the normal landing position, the main elevator controller and the carriage controller will make a response to stop the traction machine and drive the safety gears to act and stop the elevator carriage;
(7) terminal limit protection for the elevator: when the elevator carriage approaches to the top floor or bottom floor, if the main elevator controller detects via the encoding cable system that the elevator operation speed obtained through calculation doesn't meet the normal landing requirement, the main elevator controller will make a response to decelerate the traction machine; if the elevator carriage goes beyond the stop at the top floor or bottom floor, the main elevator controller and the carriage controller will detect via the encoding cable system that the position of the elevator carriage is out of the normal operation range, the main elevator controller and the carriage controller will make a response to stop the traction machine and drive the safety gears to act and stop the elevator carriage;
(8) group control system of the elevators: in the group control system, the main elevator controller of each elevator shaft transmits the position signals and operation states of the elevator carriages acquired by the encoding cable systems to the group control module in real time through the communication bus; when a landing calling module transmits a landing calling request to the group control module through the communication bus, the group control module will select an optimal operation scheme according to the current operation situation of the elevator carriages in each elevator shaft and transmit the landing calling request to the main elevator controller in a corresponding elevator shaft so that the main elevator controller will make a response.
Benefits: With the technical scheme described above, the system provided in the present invention has the following advantages over the prior art:
(1) The system achieves accurate positioning and has strong anti-interference capability: the core wires of the encoding cable in the system are arranged and intertwisted according to a Gray code scheme to eliminate electromagnetic interference, and have no overlapped junction along the entire length. Thus, the absolute address of the elevator carriage can be detected continuously with high accuracy within the travel range of the elevator carriage. The detection accuracy is 5mm, and can fully meet the requirement for accurate positioning of elevator carriage. The system eliminates accumulative errors of traditional elevator carriage positioning incurred by a rotary encoder and system errors incurred by mechanical clearance in the traction system, and achieves more accurate elevator carriage positioning under a long-time operation condition;
(2) The system is simple and reliable, has rich functions and wide applicability: the system not only realizes elevator carriage positioning with a encoding cable system, but also provides multiple functions including operation speed monitoring, leveling control, rope-free speed limit protection, anti-sliding protection, anti-shearing protection, terminal limit protection and the like, by means of the elevator control system according to the position signals acquired by the encoding and positioning system. The system realizes operation speed monitoring by means of conversion according to the rule of position change of the elevator carriage in unit time, and eliminates accumulative errors of traditional speed monitoring incurred by a rotary encoder and system errors incurred by mechanical clearance in the traction system; the system exercises deceleration on the basis of distance, realizes accurate elevator carriage leveling control, and eliminates instantaneous braking acceleration resulted from traditional leveling control; the elevator control system monitors the operation speed, the safety mechanism on the elevator carriage is controlled to act with signals transmitted through wireless transmission, so as to realize rope-free speed limit protection, and eliminates potential safety hazards related with governing ropes in high-speed elevators in high-rise buildings; the system utilizes encoded elevator carriage positioning signals, landing and door opening signals, to timely detect and make a response against any sliding or shearing accident and trigger the safety gears to act and thereby realizes anti-sliding protection and anti-shearing protection, and eliminates the defect of no response under extreme conditions in traditional systems; the system utilizes leveling control signals at the terminal landing to decelerate the elevator carriage in advance and decreases the braking acceleration in case the elevator carriage hits the ceiling or floor, and eliminates harms to the passengers resulted from instantaneous braking at a high speed in traditional systems. With the elevator carriage encoding and positioning system, it is unnecessary to deploy a series of sensors at different points in the elevator shaft for detection, and thereby the structure and control of the system are simplified, and system stability and reliability are ensured. The advantages of the system provided in the present invention are more obvious in complex systems, such as twin elevator control systems and multi-shaft elevator group control systems, etc. When the elevator carriage encoding and positioning system is applied in a twin elevator system, the positions of two elevator carriages in the same elevator shaft can be detected accurately in real time, and in case there is a tendency of collision between the two elevator carriages incurred by system failures, a warning can be provided and deceleration can be exercised in advance to prevent any collision between the two elevator carriages; when the elevator carriage encoding and positioning system is applied in a multi-shaft elevator group control system, positioning and motion detection of all elevator carriages in the elevator shafts can be realized, the algorithm of the landing calling system can be simplified, and optimal elevator scheduling can be easily realized.
IV. Description of the Drawings FIG. 1 is a structure block diagram of a single elevator system where the entire system according to the present invention is applied;
FIG. 2 is a control block diagram of the entire system according to the present invention;
FIG. 3 is a structure block diagram of a twin elevator system where the entire system according to the present invention is applied;
FIG. 4 is a structure block diagram of a multi-shaft elevator group control system where the entire system according to the present invention is applied.
In the figures: 1 - single elevator control system; 2 - carriage control system; 3 - encoding cable system; 4 - group control system; 1-1 - main elevator controller; 1-2 -wireless module 1; 1-3 -traction machine; 2-1 - display screen; 2-2 - wireless module II; 2-3 -carriage controller; 2-4 -electromagnet; 2-5 - link mechanism; 2-6 - safety gear; 2-7 - elevator carriage; 3-1 - encoded address receiver; 3-2 - induction antenna container; 3-3 - encoded address generator; 3-4 - start end container; 3-5 - encoding cable; 3-6 - terminal end container; 4-1 -communication bus; 4-2 -monitoring module; 4-3 - group control module; 4-4 - landing calling module.
V. Embodiments Hereunder the present invention will be further described with reference to the examples shown in the accompanying drawings.
As shown in Figs. 1-3, the elevator carriage encoding and positioning system provided in the present invention is applicable to single elevator systems and twin elevator systems, and mainly comprises a single elevator control system 1, a carriage control system 2, and an encoding cable system 3; the present invention is also applicable to a multi-shaft elevator group control system, and as shown in Fig. 4, the system mainly comprises single elevator control systems 1, carriage control systems 2, encoding cable systems 3, and a group control system 4. The single elevator control system 1 is located in an elevator control cabinet, the carriage control system 2 is located in an elevator carriage, the encoding cable system 3 is connected to the single elevator control system 1 and the carriage control system 2 through a communication cable, and the group control system 4 is connected to the main elevator controller in each elevator shaft through a communication bus 4-1.
The single elevator control system 1 comprises a main elevator controller 1-1 and a wireless module 1 1-2 connected to the main elevator controller 1-1 through a communication cable, wherein, the main elevator controller 1-1 is the main control center for the elevator. In a twin elevator system, the main elevator controller 1-1 controls the signal communication and control of two traction machines and two elevator carriages. In a multi-shaft elevator group control system, the main elevator controller 1-1 covers all controls except for a landing calling system.
The carriage control system 2 comprises a carriage controller 2-3, a display screen 2-1 connected to the carriage controller 2-3 through communication cables, and a wireless module II 2-2, wherein, the display screen 2-1 is configured to display the current operation state of the elevator carriage, and the two wireless modules I 1-2 and II 2-2 can communicate with each other directly through wireless communication to exchange data. A electromagnet 2-4 installed on the elevator carriage 2-7 is connected to the carriage controller 2-3 through a control cable, safety gears 2-6 are installed on two sides of the elevator carriage 2-7 near an elevator guide rail, and a link mechanism 2-5 connects the electromagnet 2-4 and the safety gears 2-6. When the carriage controller 2-3, with the help of the wireless module II 2-2, receives an elevator carriage braking command transmitted from the main elevator controller 1-1 via the wireless module I 1-2, the carriage controller 2-3 will drive the electromagnet 2-4 to act through the control cable, and the electromagnet 2-4 will drive the safety gear 2-6 to act via the link mechanism 2-5 so as to stop the elevator carriage 2-7.
The encoding cable system 3 comprises a start end container 3-4 installed on the top of the elevator shaft, a terminal end container 3-6 installed on the bottom of the elevator shaft, and an encoding cable 3-5 that connects the start end container 3-4 and the terminal end container 3-6, wherein, the encoding cable consists of a reference wire and address wires, the reference wire is used to acquire a standard signal, while the address wires are used to detect address. The address wire pairs are arranged and intertwisted according to a Gray code scheme, to ensure that the core wires of the encoding cable have no overlapped junction point along the full length. An encoded address receiver 3-1 is provided at the start end container 3-4, and an encoded address generator 3-3 and an induction antenna container 3-2 are provided on the elevator carriage near the encoding cable 3-5.
The group control system 4 comprises a communication bus 4-1 connected to the main elevator controller in each elevator shaft, and a group control module 4-3 connected to the communication bus 4-1 and landing calling modules 4-4, wherein, a monitoring module 4-2 is provided on the group control module 4-3 to display the operation positions and states of the elevator carriages in the elevator shafts.
An encoded address generator 3-3 needs to be provided in each elevator carriage 2-7. As shown in Fig. 3, in a twin elevator system, two elevator carriages 2-7 are arranged in one elevator shaft. Fig.
4 shows multi-shaft group control elevator. The function of the induction antenna container 3-2 is to transmit signals at a special frequency generated by the encoded address generator 3-3 to the encoding cable through electromagnetic coupling.
The main elevator controller 1-1 is the main control system for the elevators.
It consists of PLCs and converters, etc., and mainly controls speed and safety, etc. The carriage controller 2-3 is a sub-control system installed on an elevator carriage 2-7 and is controlled by the main elevator controller I-I. The carriage controller 2-3 controls the operation of sub-systems, including information display, frequency generation of the encoded address generator 3-3, and electrical actions of the safety gears 2-6, etc. The start end container 3-4 and the terminal end container 3-6 are junction boxes of the encoding cable at the start end and terminal end.
The elevator controller and the carriage controller described above are controllers for elevator in the prior art, and may vary depending on the elevator model.
The control method for elevator carriage encoding and positioning provided in the present invention comprises the following steps:
(1) elevator carriage encoding and positioning: the induction antenna container 3-2 transmits a signal at a special frequency generated by the encoded address generator 3-3 to the encoding cable 3-5 through electromagnetic coupling, and the signal is transmitted by the encoding cable 3-5 to the encoded address receiver 3-1 installed on the top of the elevator shaft, the signal is transmitted through the encoding cable 3-5 arranged and intertwisted according to a Gray code scheme to form an encoded address signal, the encoded address receiver 3-1 decodes the received encoded address signal, parses the address signal and transmits the address to the main elevator controller 1-1, the main elevator controller 1-1 transmits the encoded address of the elevator carriage back to the carriage control system 2 via the wireless module I 1-2, and the wireless module II 2-2 receives the encoded address and transmits the encoded address to the carriage controller 2-3;
(2) elevator carriage operation speed monitoring: the main elevator controller 1-1 and the carriage controller 2-3 carry out calculation to obtain the real-time operation speed of the elevator carriage 2-7 according to a time-varying rule of the acquired encoded address of the elevator carriage;
(3) elevator leveling control: when the elevator carriage 2-7 approaches to a destination landing, the main elevator controller 1-1 will decelerate the elevator carriage 2-7 on a distance basis according to the real-time position of the elevator carriage 2-7 acquired by the encoding cable system 3 and the speed obtained through calculation, the adjusted position of the elevator carriage 2-7 will be fed back via the encoding cable system 3, and the speed of the traction machine 1-3 will be controlled continuously to control the elevator carriage 2-7 to land accurately and steadily at the destination landing;
(4) rope-free speed limit protection for the elevator: when the main elevator controller 1-1 detects via the encoding cable system 3 that the operation speed of the elevator carriage 2-7 reaches a speed for electrical actions, the main elevator controller 1-1 will make a response to stop the traction machine 1-3 and decelerate the elevator carriage; when the carriage controller 2-3 detects via the encoding cable system 3 that the operation speed of the elevator carriages 2-7 reaches a speed for mechanical actions, the carriage controller 2-3 will make a response to de-energize the electromagnet 2-4, so that the electromagnet 2-4 will act to drive the link mechanism 2-5 on the elevator carriage to drive the safety gears 2-6 to act and stop the elevator carriage 2-7; in that control way, rope-free speed limit protection without a speed limiting steel wire rope is realized;
(5) anti-sliding protection for the elevator: when the traction machine 1-3 of the elevator is stopped, if the elevator carriage 2-7 slides by accident, the carriage controller 2-3 will make a response according to the position sliding of the elevator carriage 2-7 acquired by the encoding cable system 3 to drive the safety gears 2-6 to act and stop the elevator carriage 2-7;
(6) anti-shearing protection for the elevator: when the elevator carriage 2-7 lands at a destination landing and the door of the elevator carriage is not closed completely, if the traction machine 1-3 starts to operate, the main elevator controller 1-1 and the carriage controller 2-3 will detect via the encoding cable system 3 that the elevator carriage 2-7 is out of the normal landing position, the main elevator controller 1-1 and the carriage controller 2-3 will make a response to stop the traction machine 1-3 and drive the safety gears 2-6 to act and stop the elevator carriage 2-7;
(7) terminal limit protection for the elevator: when the elevator carriage 2-7 approaches to the top floor or bottom floor, if the main elevator controller 1-1 detects via the encoding cable system 3 that the elevator operation speed obtained through calculation doesn't meet the normal landing requirement, the main elevator controller 1-1 will make a response to decelerate the traction machine 1-3; when the elevator carriage 2-7 goes beyond the stop at the top floor or bottom floor, the main elevator controller 1-1 and the carriage controller 2-3 detect via the encoding cable system 3 that the position of the elevator carriage 2-7 is out of the normal operation range, the main elevator controller 1-1 and the carriage controller 2-3 will make a response to stop the traction machine 1-3 and drive the safety gears 2-6 to act and stop the elevator carriage 2-7;
(8) group control system of the elevators: in the group control system, the main elevator controller 1-1 in each elevator shaft transmits the position signals and operation states of the elevator carriages 2-7 acquired by the encoding cable systems 3 to the group control module 4-3 in real time through the communication bus 4-1; when a landing calling module 4-4 transmits a landing calling request to the group control module 4-3 through the communication bus 4-1, the group control module 4-3 will select an optimal operation scheme according to the current operation situation of the elevator carriages in each elevator shaft and transmit the landing calling request to the main elevator controller 1-1 in a corresponding elevator shaft so that the main elevator controller 1-1 will make a response.
What mentioned above is just example of the present invention and not used to limit the scope of the present invention. Any equivalent structure or equivalent flow variation made on the basis of the disclosure in the present invention, or any direct or indirect application in other relevant technical fields, shall be deemed as falling into the patent protection scope of the present invention.
Benefits: With the technical scheme described above, the system provided in the present invention has the following advantages over the prior art:
(1) The system achieves accurate positioning and has strong anti-interference capability: the core wires of the encoding cable in the system are arranged and intertwisted according to a Gray code scheme to eliminate electromagnetic interference, and have no overlapped junction along the entire length. Thus, the absolute address of the elevator carriage can be detected continuously with high accuracy within the travel range of the elevator carriage. The detection accuracy is 5mm, and can fully meet the requirement for accurate positioning of elevator carriage. The system eliminates accumulative errors of traditional elevator carriage positioning incurred by a rotary encoder and system errors incurred by mechanical clearance in the traction system, and achieves more accurate elevator carriage positioning under a long-time operation condition;
(2) The system is simple and reliable, has rich functions and wide applicability: the system not only realizes elevator carriage positioning with a encoding cable system, but also provides multiple functions including operation speed monitoring, leveling control, rope-free speed limit protection, anti-sliding protection, anti-shearing protection, terminal limit protection and the like, by means of the elevator control system according to the position signals acquired by the encoding and positioning system. The system realizes operation speed monitoring by means of conversion according to the rule of position change of the elevator carriage in unit time, and eliminates accumulative errors of traditional speed monitoring incurred by a rotary encoder and system errors incurred by mechanical clearance in the traction system; the system exercises deceleration on the basis of distance, realizes accurate elevator carriage leveling control, and eliminates instantaneous braking acceleration resulted from traditional leveling control; the elevator control system monitors the operation speed, the safety mechanism on the elevator carriage is controlled to act with signals transmitted through wireless transmission, so as to realize rope-free speed limit protection, and eliminates potential safety hazards related with governing ropes in high-speed elevators in high-rise buildings; the system utilizes encoded elevator carriage positioning signals, landing and door opening signals, to timely detect and make a response against any sliding or shearing accident and trigger the safety gears to act and thereby realizes anti-sliding protection and anti-shearing protection, and eliminates the defect of no response under extreme conditions in traditional systems; the system utilizes leveling control signals at the terminal landing to decelerate the elevator carriage in advance and decreases the braking acceleration in case the elevator carriage hits the ceiling or floor, and eliminates harms to the passengers resulted from instantaneous braking at a high speed in traditional systems. With the elevator carriage encoding and positioning system, it is unnecessary to deploy a series of sensors at different points in the elevator shaft for detection, and thereby the structure and control of the system are simplified, and system stability and reliability are ensured. The advantages of the system provided in the present invention are more obvious in complex systems, such as twin elevator control systems and multi-shaft elevator group control systems, etc. When the elevator carriage encoding and positioning system is applied in a twin elevator system, the positions of two elevator carriages in the same elevator shaft can be detected accurately in real time, and in case there is a tendency of collision between the two elevator carriages incurred by system failures, a warning can be provided and deceleration can be exercised in advance to prevent any collision between the two elevator carriages; when the elevator carriage encoding and positioning system is applied in a multi-shaft elevator group control system, positioning and motion detection of all elevator carriages in the elevator shafts can be realized, the algorithm of the landing calling system can be simplified, and optimal elevator scheduling can be easily realized.
IV. Description of the Drawings FIG. 1 is a structure block diagram of a single elevator system where the entire system according to the present invention is applied;
FIG. 2 is a control block diagram of the entire system according to the present invention;
FIG. 3 is a structure block diagram of a twin elevator system where the entire system according to the present invention is applied;
FIG. 4 is a structure block diagram of a multi-shaft elevator group control system where the entire system according to the present invention is applied.
In the figures: 1 - single elevator control system; 2 - carriage control system; 3 - encoding cable system; 4 - group control system; 1-1 - main elevator controller; 1-2 -wireless module 1; 1-3 -traction machine; 2-1 - display screen; 2-2 - wireless module II; 2-3 -carriage controller; 2-4 -electromagnet; 2-5 - link mechanism; 2-6 - safety gear; 2-7 - elevator carriage; 3-1 - encoded address receiver; 3-2 - induction antenna container; 3-3 - encoded address generator; 3-4 - start end container; 3-5 - encoding cable; 3-6 - terminal end container; 4-1 -communication bus; 4-2 -monitoring module; 4-3 - group control module; 4-4 - landing calling module.
V. Embodiments Hereunder the present invention will be further described with reference to the examples shown in the accompanying drawings.
As shown in Figs. 1-3, the elevator carriage encoding and positioning system provided in the present invention is applicable to single elevator systems and twin elevator systems, and mainly comprises a single elevator control system 1, a carriage control system 2, and an encoding cable system 3; the present invention is also applicable to a multi-shaft elevator group control system, and as shown in Fig. 4, the system mainly comprises single elevator control systems 1, carriage control systems 2, encoding cable systems 3, and a group control system 4. The single elevator control system 1 is located in an elevator control cabinet, the carriage control system 2 is located in an elevator carriage, the encoding cable system 3 is connected to the single elevator control system 1 and the carriage control system 2 through a communication cable, and the group control system 4 is connected to the main elevator controller in each elevator shaft through a communication bus 4-1.
The single elevator control system 1 comprises a main elevator controller 1-1 and a wireless module 1 1-2 connected to the main elevator controller 1-1 through a communication cable, wherein, the main elevator controller 1-1 is the main control center for the elevator. In a twin elevator system, the main elevator controller 1-1 controls the signal communication and control of two traction machines and two elevator carriages. In a multi-shaft elevator group control system, the main elevator controller 1-1 covers all controls except for a landing calling system.
The carriage control system 2 comprises a carriage controller 2-3, a display screen 2-1 connected to the carriage controller 2-3 through communication cables, and a wireless module II 2-2, wherein, the display screen 2-1 is configured to display the current operation state of the elevator carriage, and the two wireless modules I 1-2 and II 2-2 can communicate with each other directly through wireless communication to exchange data. A electromagnet 2-4 installed on the elevator carriage 2-7 is connected to the carriage controller 2-3 through a control cable, safety gears 2-6 are installed on two sides of the elevator carriage 2-7 near an elevator guide rail, and a link mechanism 2-5 connects the electromagnet 2-4 and the safety gears 2-6. When the carriage controller 2-3, with the help of the wireless module II 2-2, receives an elevator carriage braking command transmitted from the main elevator controller 1-1 via the wireless module I 1-2, the carriage controller 2-3 will drive the electromagnet 2-4 to act through the control cable, and the electromagnet 2-4 will drive the safety gear 2-6 to act via the link mechanism 2-5 so as to stop the elevator carriage 2-7.
The encoding cable system 3 comprises a start end container 3-4 installed on the top of the elevator shaft, a terminal end container 3-6 installed on the bottom of the elevator shaft, and an encoding cable 3-5 that connects the start end container 3-4 and the terminal end container 3-6, wherein, the encoding cable consists of a reference wire and address wires, the reference wire is used to acquire a standard signal, while the address wires are used to detect address. The address wire pairs are arranged and intertwisted according to a Gray code scheme, to ensure that the core wires of the encoding cable have no overlapped junction point along the full length. An encoded address receiver 3-1 is provided at the start end container 3-4, and an encoded address generator 3-3 and an induction antenna container 3-2 are provided on the elevator carriage near the encoding cable 3-5.
The group control system 4 comprises a communication bus 4-1 connected to the main elevator controller in each elevator shaft, and a group control module 4-3 connected to the communication bus 4-1 and landing calling modules 4-4, wherein, a monitoring module 4-2 is provided on the group control module 4-3 to display the operation positions and states of the elevator carriages in the elevator shafts.
An encoded address generator 3-3 needs to be provided in each elevator carriage 2-7. As shown in Fig. 3, in a twin elevator system, two elevator carriages 2-7 are arranged in one elevator shaft. Fig.
4 shows multi-shaft group control elevator. The function of the induction antenna container 3-2 is to transmit signals at a special frequency generated by the encoded address generator 3-3 to the encoding cable through electromagnetic coupling.
The main elevator controller 1-1 is the main control system for the elevators.
It consists of PLCs and converters, etc., and mainly controls speed and safety, etc. The carriage controller 2-3 is a sub-control system installed on an elevator carriage 2-7 and is controlled by the main elevator controller I-I. The carriage controller 2-3 controls the operation of sub-systems, including information display, frequency generation of the encoded address generator 3-3, and electrical actions of the safety gears 2-6, etc. The start end container 3-4 and the terminal end container 3-6 are junction boxes of the encoding cable at the start end and terminal end.
The elevator controller and the carriage controller described above are controllers for elevator in the prior art, and may vary depending on the elevator model.
The control method for elevator carriage encoding and positioning provided in the present invention comprises the following steps:
(1) elevator carriage encoding and positioning: the induction antenna container 3-2 transmits a signal at a special frequency generated by the encoded address generator 3-3 to the encoding cable 3-5 through electromagnetic coupling, and the signal is transmitted by the encoding cable 3-5 to the encoded address receiver 3-1 installed on the top of the elevator shaft, the signal is transmitted through the encoding cable 3-5 arranged and intertwisted according to a Gray code scheme to form an encoded address signal, the encoded address receiver 3-1 decodes the received encoded address signal, parses the address signal and transmits the address to the main elevator controller 1-1, the main elevator controller 1-1 transmits the encoded address of the elevator carriage back to the carriage control system 2 via the wireless module I 1-2, and the wireless module II 2-2 receives the encoded address and transmits the encoded address to the carriage controller 2-3;
(2) elevator carriage operation speed monitoring: the main elevator controller 1-1 and the carriage controller 2-3 carry out calculation to obtain the real-time operation speed of the elevator carriage 2-7 according to a time-varying rule of the acquired encoded address of the elevator carriage;
(3) elevator leveling control: when the elevator carriage 2-7 approaches to a destination landing, the main elevator controller 1-1 will decelerate the elevator carriage 2-7 on a distance basis according to the real-time position of the elevator carriage 2-7 acquired by the encoding cable system 3 and the speed obtained through calculation, the adjusted position of the elevator carriage 2-7 will be fed back via the encoding cable system 3, and the speed of the traction machine 1-3 will be controlled continuously to control the elevator carriage 2-7 to land accurately and steadily at the destination landing;
(4) rope-free speed limit protection for the elevator: when the main elevator controller 1-1 detects via the encoding cable system 3 that the operation speed of the elevator carriage 2-7 reaches a speed for electrical actions, the main elevator controller 1-1 will make a response to stop the traction machine 1-3 and decelerate the elevator carriage; when the carriage controller 2-3 detects via the encoding cable system 3 that the operation speed of the elevator carriages 2-7 reaches a speed for mechanical actions, the carriage controller 2-3 will make a response to de-energize the electromagnet 2-4, so that the electromagnet 2-4 will act to drive the link mechanism 2-5 on the elevator carriage to drive the safety gears 2-6 to act and stop the elevator carriage 2-7; in that control way, rope-free speed limit protection without a speed limiting steel wire rope is realized;
(5) anti-sliding protection for the elevator: when the traction machine 1-3 of the elevator is stopped, if the elevator carriage 2-7 slides by accident, the carriage controller 2-3 will make a response according to the position sliding of the elevator carriage 2-7 acquired by the encoding cable system 3 to drive the safety gears 2-6 to act and stop the elevator carriage 2-7;
(6) anti-shearing protection for the elevator: when the elevator carriage 2-7 lands at a destination landing and the door of the elevator carriage is not closed completely, if the traction machine 1-3 starts to operate, the main elevator controller 1-1 and the carriage controller 2-3 will detect via the encoding cable system 3 that the elevator carriage 2-7 is out of the normal landing position, the main elevator controller 1-1 and the carriage controller 2-3 will make a response to stop the traction machine 1-3 and drive the safety gears 2-6 to act and stop the elevator carriage 2-7;
(7) terminal limit protection for the elevator: when the elevator carriage 2-7 approaches to the top floor or bottom floor, if the main elevator controller 1-1 detects via the encoding cable system 3 that the elevator operation speed obtained through calculation doesn't meet the normal landing requirement, the main elevator controller 1-1 will make a response to decelerate the traction machine 1-3; when the elevator carriage 2-7 goes beyond the stop at the top floor or bottom floor, the main elevator controller 1-1 and the carriage controller 2-3 detect via the encoding cable system 3 that the position of the elevator carriage 2-7 is out of the normal operation range, the main elevator controller 1-1 and the carriage controller 2-3 will make a response to stop the traction machine 1-3 and drive the safety gears 2-6 to act and stop the elevator carriage 2-7;
(8) group control system of the elevators: in the group control system, the main elevator controller 1-1 in each elevator shaft transmits the position signals and operation states of the elevator carriages 2-7 acquired by the encoding cable systems 3 to the group control module 4-3 in real time through the communication bus 4-1; when a landing calling module 4-4 transmits a landing calling request to the group control module 4-3 through the communication bus 4-1, the group control module 4-3 will select an optimal operation scheme according to the current operation situation of the elevator carriages in each elevator shaft and transmit the landing calling request to the main elevator controller 1-1 in a corresponding elevator shaft so that the main elevator controller 1-1 will make a response.
What mentioned above is just example of the present invention and not used to limit the scope of the present invention. Any equivalent structure or equivalent flow variation made on the basis of the disclosure in the present invention, or any direct or indirect application in other relevant technical fields, shall be deemed as falling into the patent protection scope of the present invention.
Claims (2)
1. An elevator carriage encoding and positioning system, comprising an elevator positioning system and a group control system (4) connected to a main elevator controller in an elevator shaft, wherein, the elevator positioning system comprises a single elevator control system (1) in an elevator control cabinet, a carriage control system (2) installed in an elevator carriage, and an encoding cable system (3) connected to the single elevator control system (1) and the carriage control system (2);
the single elevator control system (1) comprises a main elevator controller (1-1) and a wireless module I (1-2) connected to the main elevator controller (1-1);
the carriage control system (2) comprises a carriage controller (2-3) installed in the elevator carriage, a display screen (2-1) connected to the carriage controller (2-3) and a wireless module II (2-2), the carriage controller (2-3) is connected to an electromagnet (2-4) installed on the elevator carriage (2-7) through a control cable, the electromagnet (2-4) is connected to a link mechanism (2-5) and connected via the link mechanism (2-5) to safety gears (2-6) arranged on the elevator carriage (2-7) near an elevator guide rail;
the encoding cable system (3) comprises a start end container (3-4) installed on the top of the elevator shaft, a terminal end container (3-6) installed on the bottom of the elevator shaft, and an encoding cable (3-5) that connects the start end container (3-4) and the terminal end container (3-6), wherein, an encoded address receiver (3-1) is provided at the start end container (3-4), and an encoded address generator (3-3) and an induction antenna container (3-2) are provided on the elevator carriage near the encoding cable (3-5);
the group control system (4) comprises a communication bus (4-1) connected to the main elevator controller in the elevator shaft, and a group control module (4-3) connected to the communication bus (4-1) and landing calling modules (4-4), wherein, a monitoring module (4-2) is provided on the group control module (4-3).
the single elevator control system (1) comprises a main elevator controller (1-1) and a wireless module I (1-2) connected to the main elevator controller (1-1);
the carriage control system (2) comprises a carriage controller (2-3) installed in the elevator carriage, a display screen (2-1) connected to the carriage controller (2-3) and a wireless module II (2-2), the carriage controller (2-3) is connected to an electromagnet (2-4) installed on the elevator carriage (2-7) through a control cable, the electromagnet (2-4) is connected to a link mechanism (2-5) and connected via the link mechanism (2-5) to safety gears (2-6) arranged on the elevator carriage (2-7) near an elevator guide rail;
the encoding cable system (3) comprises a start end container (3-4) installed on the top of the elevator shaft, a terminal end container (3-6) installed on the bottom of the elevator shaft, and an encoding cable (3-5) that connects the start end container (3-4) and the terminal end container (3-6), wherein, an encoded address receiver (3-1) is provided at the start end container (3-4), and an encoded address generator (3-3) and an induction antenna container (3-2) are provided on the elevator carriage near the encoding cable (3-5);
the group control system (4) comprises a communication bus (4-1) connected to the main elevator controller in the elevator shaft, and a group control module (4-3) connected to the communication bus (4-1) and landing calling modules (4-4), wherein, a monitoring module (4-2) is provided on the group control module (4-3).
2. A control method for encoding and positioning of an elevator carriage, comprising:
(1) encoding and positioning the elevator carriage, wherein an induction antenna container (3-2) transmits a signal at a special frequency generated by an encoded address generator (3-3) to an encoding cable (3-5) through electromagnetic coupling, and a signal is transmitted by the encoding cable (3-5) to an encoded address receiver (3-1) installed on the top of an elevator shaft, the signal is transmitted through the encoding cable (3-5) arranged and intertwisted according to a Gray code scheme to form an encoded address signal, the encoded address receiver (3-1) decodes the received encoded address signal, parses the address signal and transmits an encoded address to a main elevator controller (1-1), the main elevator controller (1-1) transmits the encoded address of the elevator carriage back to the carriage control system (2) via the wireless module I (1-2), and the wireless module II (2-2) receives the encoded address and transmits the encoded address to the carriage controller (2-3);
(2) monitoring elevator carriage operation speed, wherein the main elevator controller (1-1) and the carriage controller (2-3) carry out a calculation to obtain the real-time operation speed of the elevator carriage (2-7) according to a time-varying rule of the encoded address of the elevator carriage;
(3) providing leveling elevator control, wherein when the elevator carriage (2-7) approaches a destination landing, the main elevator controller (1-1) will decelerate the elevator carriage (2-7) on a distance basis according to the real-time position of the elevator carriage (2-7) acquired by the encoding cable system (3) and the speed obtained through calculation, the adjusted position of the elevator carriage (2-7) will be fed back via the encoding cable system (3), and speed of a hoist means (1-3) will be controlled continuously to control the elevator carriage (2-7) to land accurately and steadily at the destination landing;
(4) providing rope-free speed limit protection for the elevator, wherein when the main elevator controller (1-1) detects via the encoding cable system (3) that the operation speed of the elevator carriage (2-7) reaches a speed for electrical actions, the main elevator controller (1-1) will make a response to stop the hoist means (1-3) and decelerate the elevator carriage; when the carriage controller (2-3) detects via the encoding cable system (3) that the operation speed of the elevator carriages (2-7) reaches a speed for mechanical actions, the carriage controller (2-3) will make a response to de-energize the electromagnet (2-4), so that the electromagnet (2-4) will act to drive the link mechanism (2-5) on the elevator carriage to drive the safety gears (2-6) to act and stop the elevator carriage (2-7);
(5) providing anti-sliding protection for the elevator, wherein when the hoist means (1-3) of the elevator is stopped, if the elevator carriage (2-7) slides by accident, the carriage controller (2-3) will make a response according to the position sliding of the elevator carriage (2-7) acquired by the encoding cable system (3) to drive the safety gears (2-6) to act and stop the elevator carriage (2-7);
(6) providing anti-shearing protection for the elevator, wherein when the elevator carriage (2-7) lands at the destination landing and the door of the elevator carriage is not closed completely, if the hoist means (1-3) starts to operate, the main elevator controller (1-1) and the carriage controller (2-3) will detect via the encoding cable system (3) that the elevator carriage (2-7) is out of the normal landing position, the main elevator controller (1-1) and the carriage controller (2-3) will make a response to stop the hoist means (1-3) and drive the safety gears (2-6) to act and stop the elevator carriage (2-7);
(7) providing terminal limit protection for the elevator, wherein when the elevator carriage (2-7) approaches to the top floor or bottom floor, if the main elevator controller (1-1) detects via the encoding cable system (3) that the elevator operation speed obtained through calculation doesn't meet the normal landing requirement, the main elevator controller (1-1) will make a response to decelerate the hoist means (1-3); when the elevator carriage (2-7) goes beyond the stop at the top floor or bottom floor, the main elevator controller (1-1) and the carriage controller (2-3) detect via the encoding cable system (3) that the position of the elevator carriage (2-7) is out of the normal operation range, the main elevator controller (1-1) and the carriage controller (2-3) will make a response to stop the hoist means (1-3) and drive the safety gears (2-6) to act and stop the elevator carriage (2-7);
(8) controlling a group of the elevators, wherein the main elevator controller (1-1) in each elevator shaft transmits the position signals and operation states of the elevator carriages (2-7) acquired by the encoding cable systems (3) to the group control module (4-3) in real time through the communication bus (4-1); when a landing calling module (4-4) transmits a landing calling request to the group control module (4-3) through the communication bus (4-1), the group control module (4-3) will select an optimal operation scheme according to the current operation situation of the elevator carriages in each elevator shaft and transmit the landing calling request to the main elevator controller (1-1) in a corresponding elevator shaft so that the main elevator controller (1-1) will make a response.
(1) encoding and positioning the elevator carriage, wherein an induction antenna container (3-2) transmits a signal at a special frequency generated by an encoded address generator (3-3) to an encoding cable (3-5) through electromagnetic coupling, and a signal is transmitted by the encoding cable (3-5) to an encoded address receiver (3-1) installed on the top of an elevator shaft, the signal is transmitted through the encoding cable (3-5) arranged and intertwisted according to a Gray code scheme to form an encoded address signal, the encoded address receiver (3-1) decodes the received encoded address signal, parses the address signal and transmits an encoded address to a main elevator controller (1-1), the main elevator controller (1-1) transmits the encoded address of the elevator carriage back to the carriage control system (2) via the wireless module I (1-2), and the wireless module II (2-2) receives the encoded address and transmits the encoded address to the carriage controller (2-3);
(2) monitoring elevator carriage operation speed, wherein the main elevator controller (1-1) and the carriage controller (2-3) carry out a calculation to obtain the real-time operation speed of the elevator carriage (2-7) according to a time-varying rule of the encoded address of the elevator carriage;
(3) providing leveling elevator control, wherein when the elevator carriage (2-7) approaches a destination landing, the main elevator controller (1-1) will decelerate the elevator carriage (2-7) on a distance basis according to the real-time position of the elevator carriage (2-7) acquired by the encoding cable system (3) and the speed obtained through calculation, the adjusted position of the elevator carriage (2-7) will be fed back via the encoding cable system (3), and speed of a hoist means (1-3) will be controlled continuously to control the elevator carriage (2-7) to land accurately and steadily at the destination landing;
(4) providing rope-free speed limit protection for the elevator, wherein when the main elevator controller (1-1) detects via the encoding cable system (3) that the operation speed of the elevator carriage (2-7) reaches a speed for electrical actions, the main elevator controller (1-1) will make a response to stop the hoist means (1-3) and decelerate the elevator carriage; when the carriage controller (2-3) detects via the encoding cable system (3) that the operation speed of the elevator carriages (2-7) reaches a speed for mechanical actions, the carriage controller (2-3) will make a response to de-energize the electromagnet (2-4), so that the electromagnet (2-4) will act to drive the link mechanism (2-5) on the elevator carriage to drive the safety gears (2-6) to act and stop the elevator carriage (2-7);
(5) providing anti-sliding protection for the elevator, wherein when the hoist means (1-3) of the elevator is stopped, if the elevator carriage (2-7) slides by accident, the carriage controller (2-3) will make a response according to the position sliding of the elevator carriage (2-7) acquired by the encoding cable system (3) to drive the safety gears (2-6) to act and stop the elevator carriage (2-7);
(6) providing anti-shearing protection for the elevator, wherein when the elevator carriage (2-7) lands at the destination landing and the door of the elevator carriage is not closed completely, if the hoist means (1-3) starts to operate, the main elevator controller (1-1) and the carriage controller (2-3) will detect via the encoding cable system (3) that the elevator carriage (2-7) is out of the normal landing position, the main elevator controller (1-1) and the carriage controller (2-3) will make a response to stop the hoist means (1-3) and drive the safety gears (2-6) to act and stop the elevator carriage (2-7);
(7) providing terminal limit protection for the elevator, wherein when the elevator carriage (2-7) approaches to the top floor or bottom floor, if the main elevator controller (1-1) detects via the encoding cable system (3) that the elevator operation speed obtained through calculation doesn't meet the normal landing requirement, the main elevator controller (1-1) will make a response to decelerate the hoist means (1-3); when the elevator carriage (2-7) goes beyond the stop at the top floor or bottom floor, the main elevator controller (1-1) and the carriage controller (2-3) detect via the encoding cable system (3) that the position of the elevator carriage (2-7) is out of the normal operation range, the main elevator controller (1-1) and the carriage controller (2-3) will make a response to stop the hoist means (1-3) and drive the safety gears (2-6) to act and stop the elevator carriage (2-7);
(8) controlling a group of the elevators, wherein the main elevator controller (1-1) in each elevator shaft transmits the position signals and operation states of the elevator carriages (2-7) acquired by the encoding cable systems (3) to the group control module (4-3) in real time through the communication bus (4-1); when a landing calling module (4-4) transmits a landing calling request to the group control module (4-3) through the communication bus (4-1), the group control module (4-3) will select an optimal operation scheme according to the current operation situation of the elevator carriages in each elevator shaft and transmit the landing calling request to the main elevator controller (1-1) in a corresponding elevator shaft so that the main elevator controller (1-1) will make a response.
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| CN201510875146.5 | 2015-12-03 | ||
| CN201510875146.5A CN105384037B (en) | 2015-12-03 | 2015-12-03 | Lift car coding positioning system and control method |
| PCT/CN2015/099161 WO2017092111A1 (en) | 2015-12-03 | 2015-12-28 | Elevator carriage positioning and encoding system and control method |
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| CA2980636A1 CA2980636A1 (en) | 2017-06-08 |
| CA2980636C true CA2980636C (en) | 2019-12-31 |
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| CN (1) | CN105384037B (en) |
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| CN204342218U (en) * | 2014-12-02 | 2015-05-20 | 开封市俱进建筑机械有限公司 | A kind of building hoist electromagnetism anti-fall device |
| CN205132856U (en) * | 2015-12-03 | 2016-04-06 | 中国矿业大学 | Elevator car positioning system that encodes |
-
2015
- 2015-12-03 CN CN201510875146.5A patent/CN105384037B/en active Active
- 2015-12-28 CA CA2980636A patent/CA2980636C/en active Active
- 2015-12-28 WO PCT/CN2015/099161 patent/WO2017092111A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN105384037B (en) | 2017-07-28 |
| WO2017092111A1 (en) | 2017-06-08 |
| CA2980636A1 (en) | 2017-06-08 |
| CN105384037A (en) | 2016-03-09 |
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