Foreword
Driven by the rapid development of elevator intelligence and related information technology, people have put forward higher requirements for the operation control and management of elevator equipment, and the interactive objects of elevators also show diversified characteristics - not only need to interact with passengers, but also need to interact with other modern equipment. In the process of China's modern industrial development, machinery and equipment have become the main factor affecting the development of modern industry, among which the application of automatic guided vehicles can improve industrial production efficiency and realize automatic transportation of goods. In the process of industrial production, the freight elevator has become an important infrastructure, in order to improve the efficiency of the operation and management of the freight elevator, it is necessary to adopt an intelligent management system to optimize the design scheme of the elevator and the interactive system to ensure that it can play a good application effect. Because the elevator is a special equipment, the elevator interaction system needs to meet the relevant requirements of special equipment, and at the same time, the stability, safety and reliability of the interaction system must be ensured. The interactive system should adopt a scientific design scheme to ensure the efficient and safe operation of the elevator. 1. Overview of a**a**Equipped with electromagnetic or optical automatic guidance device, it can run according to the set guidance path, has safety protection and a variety of transplanting functions, and plays an important role in the field of modern production. a** is a wheeled mobile robot, which is a vehicle that can be automatically handled without a driver in industrial production, mainly through the computer to control its travel route and behavior. Although China's A** field started late, due to the increasing investment in this field, many self-developed high-performance A** have been produced, which has broken the situation of China's long-term dependence on imports. Second, the interaction between a** and the elevatorWhen designing the interaction system between A** and the elevator, it is first necessary to establish a data communication connection between A** and the elevator. Because A** has the characteristics of mobility, the communication between A** and its management server can be realized by wireless network, or WAN wireless communication, such as the 5th generation (5G) communication technologya**The wired network can be applied to connect the management server and the elevator. It becomes an integral part of the elevator system, including a management server, elevator, a communication module and a local area networka** management server needs to have a good communication connection with the elevator, use the network interface to enter the local area network to interact with the elevator, and the elevator communicates with the management server through the serial portIn the a** management server end and the elevator signal transmission unit, the communication module needs to be added, and a perfect connection channel is constructed, so that the a** management server can interact with a plurality of elevatorsA wireless access point (AP) is used to complete the communication connection between the management server and the a**;After obtaining the running status information of the elevator, the management server uses AP to transmit the corresponding action instructions to A**, and after receiving the action instructions, A** executes the corresponding actions of entering and exiting the elevator. 3. Design of a** interaction system with elevatorIn order to reduce the total amount of data generated during the interaction between A** and the elevator, the interactive system is designed to carry out data interaction between A** management server and the elevator, and the results can be analyzed, so that the execution command is transmitted to A**, so that A** executes the corresponding command. In the interactive system design scheme, the interaction process between A** and the elevator is as follows: A**Apply for elevator registration Elevator feedback registration is successful A**Query the floor where the elevator is located A**Request the elevator to open the door The elevator door is open and keep A**Enter or exit A**Stop request The elevator executes the door closing instruction The elevator is carried out. a**After applying for elevator registration, the next action can only be executed after the elevator feedback is successful, and there is a perfect logical relationship between the interactive processesIn the communication protocol, every bit of data can be fully used and verified, which can prevent data transmission errors and reduce the total amount of data. 3.1 a** Elevator information interaction designA**In the process of entering the elevator, information interaction is required between the A** system and the elevator, and its basic operation process is: A**Send elevator instruction registration Elevator responds to the instruction registration in the car A**Query the elevator operation status Elevator response query A**Send door opening request instruction Elevator door opening After the elevator opens the door send a ready instruction A**Enter the elevator A**Stop sending the elevator door opening signal The elevator closes. 3.2 a** out of the elevator information interaction designA**In the process of driving out of the elevator, A** system and the elevator also need information interaction, and its basic operation process is: A**Send elevator instruction registration Elevator responds to the instruction registration in the car A**Query the elevator operation status Elevator response query A**Send door opening request instruction Elevator door opening After the elevator opens the door to send a ready instruction A**Drive out of the elevator A**Stop sending the elevator door opening signal The elevator closes. 3.3 a** and elevator heartbeat flow designIn the design of the interactive system, A** transmits heartbeat messages to the elevator every 5S, which can detect the connection between A** and the elevator. The design scheme of the heartbeat flow between a** and the elevator is as follows: a** sends a heartbeat message and the elevator responds to the heartbeat message. 3.4 a** Interactive message design with the elevatorThe design scheme of the message interaction process between A** and the elevator is as follows: STX bnk nod len data sum etx. The details of the interactive packet are as follows: (1) STX is the header of the packet, which indicates the start of the communication data, is 2 bytes in length, and has 0xaa0x55 in content. (2) BNK is the elevator group number, the length is 1 byte, the No. 1 group is 0, the No. 2 group is 1, and so on. (3) NOD represents the elevator number in the group, the length is 1 byte, the No. 1 elevator is 0x00, the No. 2 elevator is 0x01, and so on. (4) len indicates the number of data bytes, and the length is 1 byte, which is determined according to the data content. (5) data indicates the content of the data. (6) sum indicates the checksum, the length is 1 byte, sum=-(bnk+nod+len+data)+1. (7) ETX is the end of the packet, indicating the end of the communication data, with a length of 1 byte and 0x03. The data content includes the request instruction of A** and the feedback information of the elevator, and the instructions defined in the design of this interactive system are as follows: (1) 0x02 means that A** queries the elevator operation status. (2) 0x82 indicates the elevator response status inquiry. (3) 0x03 indicates that A** requests the registration of instructions in the car. (4) 0x83 indicates the result of instruction registration in the elevator car. (5) 0x05 indicates the instruction of A** to request the elevator to open the door. (6) 0x85 indicates the state of the elevator responding to the state of opening the door in place. (7) 0x06 indicates that a** transmits heartbeat packets. (8) 0x86 indicates that the elevator transmits heartbeat messages. Fourth, the reliability design of the interaction system between a** and the elevatorIn the context of the rapid development of modern industrial automation, the interactive application scenarios between A** and elevators are gradually increasing, such as shopping malls, residences, etc., and A** will be applied in the future. Under the situation of the integration of 5G communication technology and industrial Internet, the application scope of A** has gradually expanded, and the industry span has gradually increased, and A** has become an important part of industrial logistics and distribution. In order to realize the efficient operation of the distribution system and improve its operation efficiency, it is necessary to do a good job in the design of the interaction system between the elevator and the elevator to ensure the reliability of the interaction between the elevator and the elevator. Judging from the current interactive system design, there is a problem of poor reliability of interaction between A** and the elevator. In the specific interaction process, A** needs to carry out multiple data exchanges with the elevator, because the service reliability provided by Ethernet is insufficient, and there will be problems such as packet loss, wrong packet error and data error in the transmission process. If the data transmission is not smooth, the operation of A** will be hindered, so it is necessary to improve the reliability of A** and the elevator interaction system. In the design of this interactive system, the data received is stored in the receiving queue by using the mode of building a data queue at the receiving end, so as to avoid the problem of untimely post-processing or data loss caused by data congestionIt is then processed by extracting legitimate packets from the receive queue to achieve efficient data transmission and processing. In the process of data sending, all data is located in the sending queue, the corresponding data packets are obtained from the sending queue according to the sending unit cycle, and the sending instruction is executed. The basic process of data interaction between a** and the elevator buffer is as follows: a**Send the message, send the buffer, read the buffer, read the message, and the elevator;Elevator Send Message Read Buffer Read Message a**. In addition, through the optimization and adjustment of the sending frequency of data packets in the sending unit, the problem of data blockage in the buffer area of the elevator can be solved, so that the interaction between A** and the elevator is smoother. Fifth, the practical application of a** and elevator interaction systemThe design scheme of this interactive system is applied to a pharmaceutical enterprise, and A** can transport the medicine box to the elevator entrance, interact with the elevator by using the message instruction, and then enter the elevator car;Finally, the elevator transports A** to the corresponding floor, which can realize the automatic operation of the whole process. In the operation process of the interactive system, after A** arrives at the elevator floor door with the drug that needs to be transported, the request signal to enter the elevator is transmitted, and the elevator system responds to the request;After the elevator runs to the floor where A** is located, the car door is opened, and the status is transmitted to A**;A**After receiving the instruction that the elevator car door is ready to open, enter the elevator, and then transmit the instruction to enter the ready, and the elevator will close the car door after responding to the instruction. After arriving at the corresponding floor, A** sends a request to leave the elevator, and the elevator opens the car door after responding to the instruction, and the state data of the car door is fully opened is transmitted to A**;a**Automatically drive out of the car door, transmit data after all drive out, and automatically close the car door after the elevator receives the data. In this process, due to the use of reliable design scheme, data transmission can be completed in a short period of time, and the problem of data transmission channel congestion can be avoided, ensuring the efficient operation of the interaction system between A** and the elevator, so as to realize the automation of goods transportation such as medicines, and save cargo handling personnel for the enterprise.
- Good article, worth sharing ---
Author: Tang Baosheng Luo Wei, Suzhou Branch of Jiangsu Special Equipment Supervision and Inspection Institute**: China Elevator
The editors of Logistics Literature and Vision are only for the purpose of conveying more information and do not represent the views of this number. If there is any infringement, **WeChat: a1799315 joint deletion.