CN115057312A - Elevator group control system and method based on communication type encoder - Google Patents
Elevator group control system and method based on communication type encoder Download PDFInfo
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- CN115057312A CN115057312A CN202210507655.2A CN202210507655A CN115057312A CN 115057312 A CN115057312 A CN 115057312A CN 202210507655 A CN202210507655 A CN 202210507655A CN 115057312 A CN115057312 A CN 115057312A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
- B66B1/2408—Control 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
- B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3415—Control system configuration and the data transmission or communication within the control system
- B66B1/3446—Data transmission or communication within the control system
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- 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 a group control main board, wherein each single elevator control system comprises an elevator control main board and an elevator control host, the elevator control host is internally provided with the communication type encoder, the elevator control main board is in communication connection with the communication type encoder, and the group control main board is in communication connection with the elevator control main board and the communication type encoder of each single elevator control system respectively; the elevator control mainboard is used for transmitting the internal and external calling request condition and the elevator load condition of the elevator to the group control mainboard, the communication type encoder is used for transmitting the running condition information and the position information of the elevator to the group control mainboard, the group control mainboard is used for carrying out group control scheduling according to the collected internal and external calling request condition, the elevator load condition, the running condition information and the position information of the elevator and sending a corresponding group control scheduling command to each single elevator control system, and each single elevator control system is used for controlling the corresponding elevator to execute the corresponding command.
Description
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 conventional elevator group control system generally communicates with a plurality of single-elevator control main boards to achieve the purpose of group control dispatching. For a group control system formed by high-speed elevators, millisecond (ms) level communication time difference may cause asynchronous group control scheduling and elevator position real-time performance, so that an ultra-long elevator waiting phenomenon may be caused, and how to enable a group control main board to obtain the running state and position information of each single elevator more quickly and accurately is the key for optimizing the rationality of group control scheduling at present.
When the elevator runs normally, the running speed and the position information in the shaft are fed back to the control system of the single elevator through each sensor, and then the information is transmitted to the group control main board by the elevator control main board in a serial port communication or Controller Area Network (CAN) communication mode. The process is not influenced by the time sequence of the single-elevator program, and the information conversion and transmission are involved, so that the real-time performance of the information finally transmitted to the group control panel is influenced 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 type encoder, which can quickly feed back the running state and position information of an elevator in real time and can furthest ensure the real-time property of the information transmitted to a group control main board.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an elevator group control system based on a communication type encoder, comprising:
each single-elevator 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 type encoder of the elevator control host;
the elevator control mainboard is used for transmitting the internal and external calling request condition and the elevator load condition of each elevator to the group control mainboard, the communication type encoder is used for transmitting the running condition information and the position information of each elevator to the group control mainboard, the group control mainboard is used for carrying out group control scheduling according to the collected internal and external calling request condition, the elevator load condition, the running condition information and the position information of each elevator and sending a corresponding group control scheduling command to each single-elevator control system, and each single-elevator control system is used for controlling each corresponding elevator to execute the corresponding command according to the received group control scheduling command of the group control mainboard.
Further, the communication type encoder employs an absolute value encoder.
Furthermore, the communication type encoder of the elevator control host of each single elevator control system outputs a single-turn value and a multi-turn value, the single-turn value is an angle value output by the communication type encoder rotating for one turn, and the multi-turn value is added with turn information on the basis of the single-turn value.
Furthermore, the elevator control main board of each single elevator control system is in communication connection with the communication type encoder in an RS485 mode, and the communication type encoder of each single elevator control system is in communication connection with the group control main board in an RS485 mode.
Furthermore, 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 elevator group control method based on the communication type encoder adopts the elevator group control system, and comprises the following steps:
s1, the group control main board sends inquiry information to the communication type encoder of the elevator control host of each single-elevator control system at regular time;
s2, after each communication type encoder receives the inquiry information of the group control mainboard, the data packet with the unique identity information of the communication type encoder is sent to the group control mainboard;
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 type encoder, and converts the data packet into the operation condition information and the position information of each elevator;
s4, the group control main board performs group control dispatching according to the running condition information and the position information of each elevator and sends corresponding group control dispatching commands 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, each corresponding elevator is controlled to execute the corresponding command.
Further, the packet data includes a single-turn value and a multi-turn value outputted from each communication type encoder, the single-turn value is an angle value outputted from a rotation of the communication type encoder, and the multi-turn value is added with turn information on the basis of the single-turn value.
Further, the single-circle value reflects the current running speed and running direction of each elevator corresponding to each single-elevator control system, and the multi-circle 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 influencing group control dispatching from heavy communication tasks of the elevator control main board and sends the key information to the communication type encoder installed in the elevator control main machine for execution. The communication type encoder can replace the characteristics and the communication stability of some elevator shaft parts, so that the group control panel can acquire the elevator running state information and the elevator position information at the fastest speed, the group control scheduling delay 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 and even ultra-high-speed elevators.
Drawings
Fig. 1 is a schematic structural diagram of a group control system based on a communication type encoder.
Detailed Description
The elevator group control system and the group control method based on the communication type encoder of the present invention will be further described with reference to the accompanying drawings and the specific embodiments.
Referring to fig. 1, the present invention discloses an elevator group control system based on a communication type encoder, which includes: the elevator control system comprises a plurality of single elevator control systems, each single elevator 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; and the group control main board is in communication connection with the elevator control main board of each single elevator control system and the communication type encoder of the elevator control host machine respectively.
The elevator control mainboard is used for transmitting the internal and external calling request condition and the elevator load condition of each elevator to the group control mainboard, the communication type encoder is used for transmitting the running condition information and the position information of each elevator to the group control mainboard, the group control mainboard is used for carrying out group control scheduling according to the collected internal and external calling request condition, the elevator load condition, the running condition information and the position information of each elevator and sending a corresponding group control scheduling command to each single-elevator control system, and each single-elevator control system is used for controlling each corresponding elevator to execute the corresponding command according to the received group control scheduling command of the group control mainboard.
In this embodiment, the communication encoder is an absolute value encoder, the model is TS5720N8602, and the single-ladder control system is a single-ladder frequency conversion logic control system. And the elevator control main board of each single elevator control system is in communication connection with the communication type encoder in an RS485 mode, and the communication type encoder of each single elevator control system is in communication connection with the group control main board in an RS485 mode. And 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-turn value and a multi-turn value, the single-turn value is an angle value output by the communication type encoder rotating a turn, and the multi-turn value is added with turn information on the basis of the single-turn value. The single-circle value can effectively reflect the current running speed and running direction of each elevator corresponding to each single-elevator control system, and the position information of each elevator corresponding to each single-elevator control system in the hoistway can be effectively acquired according to the multi-circle value.
The communication type encoder can feed back the running state and the position information of the elevator in real time as fast as possible through the elevator control host. The conversion from analog quantity to digital quantity is not involved, and the communication type encoder can be directly communicated with the group control main board, so that the multi-step information transmission is directly reduced into one-step information transmission. And the program in the communication type encoder mainly plays a role of data transmission, does not relate to the control of single-elevator operation logic, and can ensure the real-time performance of information transmitted to the group control main board to the greatest extent.
In the elevator group control system based on the communication type encoder, a group control main board is responsible for collecting the internal and external calling request condition of each elevator, the static or running state information of the elevator, and then the dispatching judgment which is most consistent with the current working condition is made. In the invention, data with low real-time requirement such as internal and external calling request conditions, whether the elevator is over-full load and the like are transmitted through the elevator control main board. And the information that whether the elevator starts, whether the elevator is accelerated or decelerated and the relative position of each elevator in the whole group control system, which changes quite fast in the high-speed running process, can be directly provided 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 and comprises the following steps:
and S1, the group control main board sends inquiry information to the communication type encoder of the elevator control host of each single-elevator control system at regular time.
And S2, after each communication type encoder receives the inquiry information of the group control main board, the data packet with the unique identity information of the communication type encoder is sent to the group control main board.
And 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 type encoder, and converts the data packet into the operating condition information and the position information of each elevator.
And S4, the group control main board performs group control dispatching according to the running condition information and the position information of each elevator, and sends a corresponding group control dispatching 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, each corresponding elevator is controlled to execute the corresponding command.
The data packet data comprises a single-circle value and a multi-circle value output by each communication type encoder, the single-circle value is an angle value output by one rotation of the communication type encoder, and the multi-circle value is added with circle number information on the basis of the single-circle value. The single-circle value can effectively reflect the current running speed and running direction of each elevator corresponding to each single-elevator control system, and the position information of each elevator corresponding to each single-elevator control system in the hoistway can be effectively acquired according to the multi-circle value.
The group control mainboard inquires a single-turn value or a multi-turn value from each communication type encoder at regular time, the communication type encoders send data packets with own unique identity information after receiving inquiry information of the group control mainboard, the group control mainboard 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, converts the data of the single-turn value or the multi-turn value in the data packets into the running condition information and the position information of each elevator, and uses the running condition information and the position information as the main basis for making group control scheduling judgment. The loss of key information caused by too many communication tasks processed by the elevator control main board can be avoided, so that one elevator starts, but the group control main board still calls the outside to be allocated to the started elevator due to communication delay, and the passenger overlong elevator waiting condition is caused.
The elevator group control method based on the communication type encoder will be described in detail by way of example.
The elevator group control system based on the communication type encoder is composed of four single-elevator control systems corresponding to four elevators and a group control main board, and 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-elevator control system is in communication connection with the communication type encoder in an RS485 mode, and the communication type encoder of each single-elevator control system is in communication connection with the group control main board in an RS485 mode. And 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 mainboard receives data with identity information of 1, 2, 3 and 4 on the 485 bus respectively. If the calling conditions of the No. 1 elevator with the communication type encoder identity information of 1 and the No. 2 elevator with the communication type encoder identity information of 2 are the same, and the number and the weight of passengers in the elevators are the same, when the two elevators reach the same calling floor, the forward calling of the calling floor is pressed, and the display floors of the two elevators are the same under the external display condition. According to the communication mode of the common group control system, the operation conditions of the two elevators are the same for the group control main board, and the group control main board can distribute an external call request to the elevator number 1 with the priority of the elevator number under the common condition. In fact, according to the multi-turn values transmitted by the two communication type encoders, the 2 th elevator can be judged to be the elevator closer to the floor of the external call request, and only because the flat position sensor in the elevator car is not triggered, the 2 nd elevator is still considered to be positioned on the same floor with the 1 st elevator, so that the allocation of the external call request to the 2 nd elevator is more reasonable judgment.
In addition, when the elevator has a time difference from door closing to starting operation, if starting operation information is sent to the group control main board in time, and the elevator does not start operation when the elevator just closes the door, an external call request to the floor can enable the elevator just closing the door to reopen the door to respond to the external call request. In the communication mode of the common group control system, the starting operation information is transmitted to the group control main board at a time delay, so that the elevator is started to operate and leaves the door area, and the external call request is still allocated to the elevator. According to the embodiment, the communication pressure related to the data in the single-elevator control system is released through the action feedback of the elevator control host and the communication reliability of the communication type encoder, so that all parts in the elevator group control system can be more coordinately matched.
In summary, the invention eliminates some key information influencing group control dispatching from the heavy communication tasks of the elevator control main board of each single elevator control system, and sends the information to the communication type encoder installed in the elevator control main machine for execution. The communication type encoder can replace the characteristics and the communication stability of some elevator shaft parts, so that the group control main board can acquire the elevator running state information and the elevator position information at the fastest speed, the group control scheduling delay caused by the communication time difference is avoided, the real-time performance of the whole elevator group control system is optimized, and the communication type encoder has great significance in the group control system of high-speed and even ultra-high-speed elevators.
The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.
Claims (8)
1. An elevator group control system based on a communication type encoder, comprising:
the elevator control system comprises a plurality of single elevator control systems, each single elevator 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 type encoder of the elevator control host;
the elevator control mainboard is used for transmitting the internal and external calling request condition and the elevator load condition of each elevator to the group control mainboard, the communication type encoder is used for transmitting the running condition information and the position information of each elevator to the group control mainboard, the group control mainboard is used for carrying out group control scheduling according to the collected internal and external calling request condition, the elevator load condition, the running condition information and the position information of each elevator and sending a corresponding group control scheduling command to each single-elevator control system, and each single-elevator control system is used for controlling each corresponding elevator to execute the corresponding command according to the received group control scheduling command of the group control mainboard.
2. The group control system for elevators based on communication-type encoders of claim 1, wherein the communication-type encoder employs an absolute value encoder.
3. The group control system of claim 1, wherein the communication type encoder of the elevator control main unit of each individual elevator control system outputs a single-turn value and a multi-turn value, the single-turn value being an angle value outputted by one rotation of the communication type encoder, and the multi-turn value being added with the turn information on the basis of the single-turn value.
4. The group control system of elevators based on communication type encoders as claimed in claim 1, wherein the elevator control board of each single elevator control system is communicatively connected to the communication type encoder in an RS485 manner, and the communication type encoder of each single elevator control system is communicatively connected to the group control board in an RS485 manner.
5. The group control system for elevators based on communication-type encoders as claimed in claim 1, wherein the elevator control board of each individual elevator control system is in communication connection with the group control board in a CAN manner.
6. A group control method for elevators based on a communication type encoder using the group control system for elevators according to any one of claims 1 to 5, comprising the steps of:
s1, the group control main board sends inquiry information to the communication type encoder of the elevator control host of each single-elevator control system at regular time;
s2, after each communication type encoder receives the inquiry information of the group control main board, the data packet with the unique identity information of the communication type encoder is sent 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 type encoder, and converts the data packet into the operation condition information and the position information of each elevator;
s4, the group control main board performs group control dispatching according to the running condition information and the position information of each elevator and sends corresponding group control dispatching commands 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, each corresponding elevator is controlled to execute the corresponding command.
7. The communication-type-encoder-based group control method for elevators according to claim 6, wherein the packet data includes a single-turn value and a multi-turn value outputted from each communication-type encoder, the single-turn value being an angle value outputted from one rotation of the communication-type encoder, and the multi-turn value being added with the turn number information on the basis of the single-turn value.
8. The group control method for elevators based on communication-type encoders of claim 7, wherein the single-turn value reflects a current operation speed and a current operation direction of each elevator corresponding to each individual elevator control system, and the multi-turn value reflects position information of each elevator corresponding to each individual elevator control system in the hoistway.
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