CN115057312B - Elevator group control system and group control method based on communication encoder - Google Patents

Elevator group control system and group control method based on communication encoder Download PDF

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Publication number
CN115057312B
CN115057312B CN202210507655.2A CN202210507655A CN115057312B CN 115057312 B CN115057312 B CN 115057312B CN 202210507655 A CN202210507655 A CN 202210507655A CN 115057312 B CN115057312 B CN 115057312B
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elevator
group control
main board
control system
communication
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CN115057312A (en
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王琛
黄棣华
聂益波
蓝秀清
吴锦龙
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Guangzhou Guangri Elevator Industry Co Ltd
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Guangzhou Guangri Elevator Industry Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00Control systems of elevators in general
    • B66B1/24Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/2408Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration where the allocation of a call to an elevator car is of importance, i.e. by means of a supervisory or group controller
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00Control systems of elevators in general
    • B66B1/24Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/28Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00Control systems of elevators in general
    • B66B1/34Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/3415Control system configuration and the data transmission or communication within the control system
    • B66B1/3446Data transmission or communication within the control system

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
  • Elevator Control (AREA)

Abstract

The invention discloses an elevator group control system based on a communication type encoder, which comprises a plurality of single-elevator control systems and group control main boards, wherein each single-elevator control system comprises an elevator control main board and an elevator control host, the communication type encoder is arranged in the elevator control host, the elevator control main board is in communication connection with the communication type encoder, and the group control main board is respectively in communication connection with the elevator control main board and the communication type encoder of each single-elevator control system; the elevator control main board is used for transmitting the elevator calling request condition and elevator loading condition to the group control main board, the communication encoder is used for transmitting the elevator running condition information and position information to the group control main board, and the group control main board is used for carrying out group control dispatching according to the collected elevator calling request condition, elevator loading condition, running condition information and position information and transmitting corresponding group control dispatching commands to each single elevator control system, and each single elevator control system is used for controlling the corresponding elevator to execute corresponding commands.

Description

Elevator group control system and group control method based on communication encoder
Technical Field
The invention relates to the technical field of elevators, in particular to an elevator group control system and an elevator group control method.
Background
The current elevator group control system generally uses a plurality of single-ladder control mainboards to communicate with a group control mainboard so as to achieve the purpose of group control scheduling. For a group control system formed by high-speed elevators, the communication time difference in millisecond (ms) level may cause the asynchronous of the group control dispatching and the real-time of the elevator position, so that the extremely long waiting elevator phenomenon may be caused, and therefore, how to enable the group control main board to obtain the running state and the position information of each single elevator more quickly and accurately is the key for optimizing the rationality of the group control dispatching at present.
In normal operation of the elevator, the running speed and the position information in the hoistway are fed back to a control system of the single elevator through sensors, and then the elevator control main board transmits the information to the group control main board through serial communication or controller area network (Controller Area Network, CAN) communication. The process is not only affected by the time sequence of a single ladder program, but also involves the conversion and transmission of information, and the real-time performance of the information finally transmitted to the group control board is affected to a certain extent.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an elevator group control system and a group control method based on a communication encoder, which can feed back the running state and position information of an elevator in real time at maximum and ensure the real-time property of the information transmitted to a group control main board to the maximum.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an elevator group control system based on a communication encoder, comprising:
each single-ladder control system comprises an elevator control main board and an elevator control host, a communication type encoder is arranged in the elevator control host, and the elevator control main board is in communication connection with the communication type encoder of the elevator control host;
the group control main board is respectively in communication connection with the elevator control main board of each single-elevator control system and the communication encoder of the elevator control host;
the elevator control main board is used for transmitting the internal and external call request condition and the elevator load condition of each elevator to the group control main board, the communication encoder is used for transmitting the running condition information and the position information of each elevator to the group control main board, the group control main board is used for carrying out group control dispatching according to the collected internal and external call request condition, elevator load condition, running condition information and position information of each elevator, and transmitting corresponding group control dispatching commands to each single elevator control system, and each single elevator control system is used for controlling each corresponding elevator to execute corresponding commands according to the received group control dispatching commands of the group control main board.
Further, the communication type encoder adopts an absolute value encoder.
Further, the communication type encoder of the elevator control host of each single-elevator control system outputs a single-circle value and a multi-circle value, wherein the single-circle value is an angle value output by the communication type encoder in one circle of rotation, and the multi-circle value is the information of the added circle on the basis of the single-circle value.
Furthermore, the elevator control main board of each single-ladder control system is in communication connection with the communication type encoder in an RS485 mode, and the communication type encoder of each single-ladder control system is in communication connection with the group control main board in an RS485 mode.
Furthermore, the elevator control main board and the group control main board of each single-ladder control system are in communication connection in a CAN mode.
An elevator group control method based on a communication encoder adopts the elevator group control system, and comprises the following steps:
s1, a group control main board regularly transmits inquiry information to a communication encoder of an elevator control host of each single-elevator control system;
s2, after each communication encoder receives the inquiry information of the group control main board, the communication encoder sends a data packet with unique identity information to the group control main board;
s3, the group control main board determines the elevator number of each elevator corresponding to each single elevator control system according to the fixed identity information of each communication encoder, and converts the data packet data into the running state information and the position information of each elevator;
s4, the group control main board performs group control scheduling according to the running condition information and the position information of each elevator, and sends a corresponding group control scheduling command to each single elevator control system;
and S5, after each single-elevator control system receives the group control dispatching command of the group control main board, controlling each corresponding elevator to execute the corresponding command.
Further, the data packet data includes a single-turn value and a multi-turn value output by each communication type encoder, the single-turn value is an angle value output by the communication type encoder in one turn, and the multi-turn value is the information of the added turns based on the single-turn value.
Further, the single-turn value reflects the current running speed and running direction of each elevator corresponding to each single-elevator control system, and the multi-turn value reflects the position information of each elevator corresponding to each single-elevator control system in the hoistway.
Compared with the prior art, the invention eliminates some key information affecting group control dispatching from the heavy communication task of the elevator control main board and gives the key information to the communication type encoder arranged in the elevator control main board for execution. The communication encoder can replace the characteristics of some elevator well parts and the communication stability thereof, so that the group control board can acquire the elevator running state information and the elevator position information fastest, the group control scheduling lag caused by the communication time difference is avoided, the real-time performance of the whole group control system is optimized, and the method has great significance in the group control system of high-speed or even ultra-high-speed elevators.
Drawings
Fig. 1 is a schematic diagram of a group control system based on a communication encoder.
Detailed Description
The elevator group control system and the group control method based on the communication encoder of the invention are further described below with reference to the accompanying drawings and the specific embodiments.
Referring to fig. 1, the invention discloses an elevator group control system based on a communication encoder, which comprises: each single-ladder control system comprises an elevator control main board and an elevator control host, a communication type encoder is arranged in the elevator control host, and the elevator control main board is in communication connection with the communication type encoder of the elevator control host; the group control main board is respectively in communication connection with the elevator control main board of each single-elevator control system and the communication encoder of the elevator control host.
The elevator control main board is used for transmitting the internal and external call request condition and the elevator load condition of each elevator to the group control main board, the communication encoder is used for transmitting the running condition information and the position information of each elevator to the group control main board, the group control main board is used for carrying out group control dispatching according to the collected internal and external call request condition, elevator load condition, running condition information and position information of each elevator, and transmitting corresponding group control dispatching commands to each single elevator control system, and each single elevator control system is used for controlling each corresponding elevator to execute corresponding commands according to the received group control dispatching commands of the group control main board.
In the embodiment, the communication encoder adopts an absolute value encoder, the model is TS5720N8602, and the single-ladder control system adopts a single-ladder frequency conversion logic control system. The elevator control main board of each single-ladder control system is in communication connection with the communication type encoder in an RS485 mode, and the communication type encoder of each single-ladder control system is in communication connection with the group control main board in an RS485 mode. The elevator control main board of each single-elevator control system is in communication connection with the group control main board in a CAN mode.
The communication type encoder of the elevator control host of each single-elevator control system outputs a single-circle value and a plurality of circle values, wherein the single-circle value is an angle value output by the communication type encoder in one circle of rotation, and the plurality of circle values are the circle information added on the basis of the single-circle value. The single-circle value can effectively embody the current running speed and running direction of each elevator corresponding to each single-ladder control system, and the position information of each elevator corresponding to each single-ladder control system in a well can be effectively obtained according to the multi-circle value.
The communication encoder can feed back the running state and position information of the elevator in real time most quickly through the elevator control host. The conversion from analog quantity to digital quantity is not involved, and the communication encoder can be directly communicated with the group control main board, so that the multi-step information transmission is directly reduced to one-step information transmission. The function of the program in the communication encoder is mainly data transmission, the control of single ladder operation logic is not involved, and the real-time property of information transmitted to the group control main board can be ensured to the greatest extent.
In the elevator group control system based on the communication encoder, a group control main board is responsible for collecting the internal and external call request condition of each elevator, and the elevator is static or running state information, and then makes scheduling judgment which is most in line with the current working condition. In the invention, the data with low real-time requirements such as the internal and external call request condition, whether the elevator is in full load or not and the like are transmitted through the elevator control main board. The information that whether the elevators start, are in acceleration or deceleration and the relative position of each elevator in the whole group control system change quite rapidly in the high-speed running process can be directly given to the group control main board through a 485 bus connected between the communication type encoder and the group control main board.
The invention also discloses an elevator group control method based on the communication type encoder, which adopts the elevator group control system based on the communication type encoder and comprises the following steps:
s1, the group control main board regularly transmits inquiry information to a communication type encoder of an elevator control host of each single-elevator control system.
S2, after each communication encoder receives the inquiry information of the group control main board, the communication encoder sends the data packet with the unique identity information to the group control main board.
S3, the group control main board determines the elevator number of each elevator corresponding to each single elevator control system according to the fixed identity information of each communication encoder, and converts the data packet data into the running state information and the position information of each elevator.
And S4, the group control main board performs group control scheduling according to the running condition information and the position information of each elevator, and sends a corresponding group control scheduling command to each single-elevator control system.
And S5, after each single-elevator control system receives the group control dispatching command of the group control main board, controlling each corresponding elevator to execute the corresponding command.
The data packet data comprises a single-circle value and a plurality of circles of values output by each communication type encoder, wherein the single-circle value is an angle value output by the communication type encoder in one circle of rotation, and the plurality of circles of values are added with circle information on the basis of the single-circle value. The single-circle value can effectively embody the current running speed and running direction of each elevator corresponding to each single-ladder control system, and the position information of each elevator corresponding to each single-ladder control system in a well can be effectively obtained according to the multi-circle value.
The group control main board can regularly inquire a single-circle value or a multi-circle value to each communication type encoder, after receiving the inquiry information of the group control main board, the communication type encoder sends a data packet with unique identity information, the group control main board determines the elevator number of each elevator corresponding to each single-elevator control system according to the fixed identity information of each communication type encoder, and the data of the single-circle value or the multi-circle value in the data packet is converted into the running condition information and the position information of each elevator to be used as a main basis for making group control scheduling judgment. The elevator control main board can avoid losing the key information caused by too many communication tasks processed by the elevator control main board, so that one elevator is started, but the group control main board still distributes the call to the started elevator due to communication delay, and the situation that passengers wait for the elevator excessively long is caused.
The elevator group control method based on the communication encoder is described in detail below by way of example.
The elevator group control system based on the communication type encoder consists of four single-elevator control systems corresponding to four elevators and a group control main board, wherein the communication type encoder is arranged in an elevator control host of each single-elevator control system. The elevator control main board of each single-ladder control system is in communication connection with the communication type encoder in an RS485 mode, and the communication type encoder of each single-ladder control system is in communication connection with the group control main board in an RS485 mode. The elevator control main board of each single-elevator control system is in communication connection with the group control main board in a CAN mode.
In the running process of the four elevators, the group control main board receives data with identity information of 1, 2, 3 and 4 on a 485 bus. If the elevator 1 with the identity information of the communication type encoder is the same as the elevator 2 with the identity information of the communication type encoder, the number of passengers in the elevator is exactly the same, and when the two elevators reach the same elevator calling request floor quickly, the forward calling of the elevator calling request floor is pressed, and at the moment, the display floors of the two elevators are the same under the condition of external display. According to the communication mode of the common group control system, the running conditions of the two elevators are the same for the group control main board, and the group control main board generally distributes an external calling request to a number 1 elevator with priority. In practice, according to the multi-turn value transmitted by the two communication encoders, it can be determined that the elevator No. 2 is one closer to the call request floor, and only because the leveling position sensor in the elevator car is not triggered yet, it is still considered that the elevator No. 2 is still located at the same floor as the elevator No. 1, so that it is more reasonable to assign the call request to the elevator No. 2.
In addition, when the elevator has a time difference from closing the door to starting operation, if starting operation information is timely given to the group control main board, when the elevator is just closed and the door is not started to operate, the elevator on the floor can be enabled to be restarted by the outward calling request. In the communication mode of the common group control system, the starting operation information is transmitted to the group control main board with a large probability to have time delay, so that the situation that the elevator is started to operate and leave the door zone position and the calling request is still distributed to the elevator frequently occurs. According to the embodiment, through action feedback of the elevator control host and communication reliability of the communication encoder, communication pressure of the part of data in the single elevator control system is relieved, and all parts in the elevator group control system can be matched more in a coordinated manner.
In summary, the present invention eliminates some key information affecting group control scheduling from the heavy communication tasks of the elevator control main board of each single-elevator control system, and sends the key information to the communication type encoder installed in the elevator control main machine for execution. The communication encoder can replace the characteristics of some elevator well parts and the communication stability thereof, so that the group control main board can acquire the elevator running state information and the elevator position information fastest, the group control dispatch lag caused by the communication time difference is avoided, the real-time performance of the whole elevator group control system is optimized, and the communication encoder has great significance in the group control system of high-speed or even ultra-high-speed elevators.
The foregoing description is directed to the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the invention, and all equivalent changes or modifications made under the technical spirit of the present invention should be construed to fall within the scope of the present invention.

Claims (3)

1. An elevator group control system based on a communication encoder, comprising:
the elevator control system comprises a plurality of single-ladder control systems, wherein each single-ladder control system comprises an elevator control main board and an elevator control host, a communication type encoder is arranged in the elevator control host, the communication type encoder adopts an absolute value encoder, and the elevator control main board of each single-ladder control system is in communication connection with the communication type encoder of the elevator control host in an RS485 mode;
the group control main board is in communication connection with the elevator control main boards of each single-ladder control system in a CAN mode, and is in communication connection with the communication encoder of each single-ladder control system in an RS485 mode;
the elevator control main board is used for transmitting the internal and external call request condition and the elevator load condition of each elevator to the group control main board, the communication encoder is used for transmitting the running condition information and the position information of each elevator to the group control main board, the group control main board is used for carrying out group control dispatching according to the collected internal and external call request condition, elevator load condition, running condition information and position information of each elevator, and transmitting corresponding group control dispatching commands to each single elevator control system, and each single elevator control system is used for controlling each corresponding elevator to execute corresponding commands according to the received group control dispatching commands of the group control main board.
2. The elevator group control system based on a communication type encoder according to claim 1, wherein the communication type encoder of the elevator control host of each single elevator control system outputs a single turn value and a plurality of turn values, the single turn value being an angle value outputted by one turn of the communication type encoder, the plurality of turn values being information of adding turns on the basis of the single turn value.
3. Elevator group control method based on communication type encoder, using an elevator group control system based on communication type encoder as defined in any one of claims 1 to 2, characterized by comprising the steps of:
s1, a group control main board regularly transmits inquiry information to a communication encoder of an elevator control host of each single-elevator control system;
s2, after each communication encoder receives the inquiry information of the group control main board, the communication encoder sends a data packet with unique identity information to the group control main board;
the data packet data comprises a single-turn value and a plurality of turn values output by each communication type encoder, wherein the single-turn value is an angle value output by the communication type encoder in one turn, and the plurality of turn values are obtained by adding turn information on the basis of the single-turn value;
the single-turn value reflects the current running speed and running direction of each elevator corresponding to each single-elevator control system, and the multi-turn value reflects the position information of each elevator corresponding to each single-elevator control system in a hoistway;
s3, the group control main board determines the elevator number of each elevator corresponding to each single elevator control system according to the fixed identity information of each communication encoder, and converts the data packet data into the running state information and the position information of each elevator;
s4, the group control main board performs group control scheduling according to the running condition information and the position information of each elevator, and sends a corresponding group control scheduling command to each single elevator control system;
and S5, after each single-elevator control system receives the group control dispatching command of the group control main board, controlling each corresponding elevator to execute the corresponding command.
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Publication number Priority date Publication date Assignee Title
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CN203173621U (en) * 2013-02-21 2013-09-04 深圳市海浦蒙特科技有限公司 Elevator integrated controller
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