CN-121986469-A - Data transmission system

Abstract

It is simply determined on the delivery side whether or not the process of delivering the operation information concerning the operation status of the elevator is continued. The data transmission system (100) includes a first server device (4) that functions as a proxy, and a communication device (3). A delivery unit (312) of the communication device, in a transmission mode, when the communication device receives a transmission continuation request before a predetermined period has elapsed after receiving a transmission continuation request delivered to the first server device in the second topic from the request source device (8), continues the transmission mode, and when the communication device has not received the transmission continuation request after the transmission continuation request has been received last, switches to a non-transmission mode.

Inventors

• URABE SHUNSUKE

Assignees

• 富士达株式会社

Dates

Publication Date

20260505

Application Date

20241216

Priority Date

20240227

Claims (6)

1. 1. A data transmission system including a server device and one or more communication devices which can communicate with each other using a publish/subscribe communication scheme and function as a proxy; The communication device is provided with: a receiving unit that receives, from an elevator control device that is communicably connected to the own device, operation information related to an operation state of an elevator controlled by the elevator control device; A distribution unit configured to switch an operation mode to any one of a transmission mode in which the operation information received by the reception unit is distributed to the server device on a predetermined first basis every time the operation information is received, and a non-transmission mode in which the distribution is not performed, A subscribing unit that subscribes, when switching to the transmission mode, to the server device, a second topic created based on the identification information of the elevator; the server device is provided with: A first transmitting unit that transmits, to the communication device that has subscribed to the second topic with the server device, a transmission continuation request of the action information issued from a request source device to the server device with the second topic; The issuing unit is configured to, in the transmission mode, When the communication device receives the transmission continuation request before a predetermined period of time has elapsed after receiving the transmission continuation request last time, continuing the transmission mode, And switching to the non-transmission mode when the predetermined period of time has elapsed since the communication device received the transmission continuation request last time and the transmission continuation request was not received.
2. 2. The data transmission system according to claim 1, wherein the elevator control device transmits the operation information to the communication device every time an operation condition of an elevator controlled by the elevator control device changes.
3. 3. The data transmission system according to claim 1, wherein the request source device has a function of providing the operation information of a specified elevator available to a terminal device of a user of the data transmission system; The transmission continuation request is issued to the server device with the second theme created from the identification information of the specified elevator while the terminal device is providing the operation information from the request source device to the terminal device at a predetermined frequency by using the function.
4. 4. The data transmission system according to claim 1, wherein the server device includes: A second transmitting unit that, when receiving the action information issued by the issuing unit, transmits the received action information to a transmission destination device that subscribes to the first topic with respect to the server device; The transmission destination device performs a process of storing the received motion information in a storage device each time the motion information is received from the server device; The request source device has the function of providing the action information of the specified elevator available to the terminal device of the user of the data transmission system; When the terminal device is utilizing the function, the operation information of the specified elevator is sequentially acquired from the storage device, and the acquired operation information is transmitted to the terminal device.
5. 5. The data transmission system according to claim 1, wherein the request source device has a function of providing the operation information of a specified elevator available to a terminal device of a user of the data transmission system; When the function is used from the terminal device after the predetermined period has elapsed since the last time the function was used by the terminal device, performing a process of transmitting a transmission start request of the operation information to the communication device; When the communication device receives the transmission start request, the issuing unit switches the operation mode to the transmission mode.
6. 6. A data transmission system according to any one of claims 3 to 5, the functionality being provided by an application programming interface API.

Description

Data transmission system Technical Field An aspect of the present invention relates to a data transmission system for transmitting motion information related to a motion situation of an elevator. Background Patent document 1 discloses an example of a system for monitoring an elevator. In the system of patent document 1, a specific monitor's mobile phone is connected in response to a call from an intercom in an elevator car, and video data of a monitoring camera provided in an elevator hall is transmitted to the monitor's mobile phone. In this system, image data to be transmitted to a mobile phone is switched in accordance with a switching instruction of image data to be monitored. Prior art literature Patent literature Patent document 1 Japanese patent application No. 4369253 Disclosure of Invention Problems to be solved by the invention However, patent document 1 does not disclose a technique related to transmission and reception of information related to an elevator using a publish/subscribe communication system. An object of one aspect of the present invention is to simply determine on a release side whether or not to continue a process of releasing operation information related to an operation status of an elevator using a publish/subscribe communication scheme. Technical means adopted for solving the problems A data transmission system according to an aspect of the present invention includes a server device and one or more communication devices that can communicate with each other using a publish/subscribe type communication scheme, wherein the communication device includes a reception unit that receives operation information related to an operation state of an elevator controlled by the elevator control device from an elevator control device communicably connected to the communication device, a publication unit that switches an operation mode to any one of a transmission mode in which the received operation information is published to the server device with a predetermined first theme each time the reception unit receives the operation information, and a non-transmission mode in which the transmission is not performed, and a subscription unit that subscribes to a second theme created based on identification information of the elevator from the server device when switching to the transmission mode, wherein the server device includes a first transmission unit that transmits the communication device having subscribed to the second theme to the server device, and continues the transmission of the request from the request source device to the server device with the predetermined first theme, and continues the transmission of the request until the transmission is continued until the request is received from the request device and the transmission device continues in the transmission mode. Effects of the invention According to one aspect of the invention, it can be simply judged on the issuing side whether or not the process of issuing the operation information related to the operation status of the elevator using the publish/subscribe type communication method is continued. Drawings Fig. 1 is a block diagram showing an example of the configuration of a data transmission system according to an embodiment of the present invention. Fig. 2 is a sequence diagram showing an example of a data flow based on the first use API. Fig. 3 is a sequence diagram showing an example of a data flow based on the API used for the second and subsequent times after switching to the transmission mode. Fig. 4 is a sequence diagram showing an example of the data flow when the API is not used for a predetermined period. Detailed Description The data transmission system 100 of the present embodiment will be described below. [ Outline of data Transmission System ] First, an outline of the data transmission system 100 will be described based on fig. 1. Fig. 1 is a block diagram showing an example of the configuration of a data transmission system 100. The data transmission system 100 is a system capable of transmitting operation information related to the operation status of the elevator 1 controlled by the elevator control device 2 from the elevator control device 2 to the terminal device 9. The data transmission system 100 transmits the operation information of the elevator 1 to the terminal device 9, whereby the user of the terminal device 9 can grasp the operation state of the elevator 1. The operation information includes, for example, information such as an abnormal occurrence state in the elevator 1 and an operation state of the elevator 1. The information indicating the operation condition may include, for example, information such as the position of the car, the weight in the car, and the opening/closing condition of the door. The motion information corresponds to the identification information of the elevator 1. The identification information of the elevator 1 may correspond to, for example, the model name of the elevator 1 an