KR-20260064453-A - Sensor gateway

Abstract

The present invention relates to a sensor gateway and is characterized by comprising: an upper interface unit providing a communication interface with an upper server; a sensor interface unit providing a communication interface with a sensor by having a plurality of sensor channels; and a timestamp unit that measures a path delay time based on the physical distance between the sensor interface unit and the sensor by utilizing the difference between a timestamp at the time of transmitting a sensor control command from the upper server to the sensor through the sensor interface unit and a timestamp at the time of receiving a response to the sensor control command through the sensor interface unit, and estimates the time of acquiring the sensor value of the sensor based on the path delay time.

Inventors

• 김희도
• 윤기하
• 김재인
• 손병희

Assignees

• 한국전자통신연구원

Dates

Publication Date

20260507

Application Date

20250414

Priority Date

20241030

Claims (1)

1. Upper interface section providing a communication interface with an upper server; A sensor interface unit having a plurality of sensor channels to provide a communication interface with the sensor; and A sensor gateway comprising a timestamp unit that measures a path delay time based on the physical distance between the sensor interface unit and the sensor by utilizing the difference between a timestamp at the time of transmitting a sensor control command of the upper server to the sensor through the sensor interface unit and a timestamp at the time of receiving a response to the sensor control command through the sensor interface unit, and estimates the time of acquiring the sensor value of the sensor based on the path delay time.

Description

Sensor gateway The present invention relates to a sensor gateway. A sensor gateway is installed between an upper server and a sensor to receive sensing data acquired and sent by the sensor and transmit it to the upper server. The sensor gateway is connected to the sensor or the upper server through a sensor interface channel and an upper interface channel. The sensor interface channel is a conduit for receiving sensing data from sensors, transmitting sensor control commands to sensors, and receiving responses from sensors. The upper interface channel is a conduit for transmitting sensor data to the upper server, receiving upper-level commands from the upper server, and transmitting gateway responses to the upper server. Sensor data consists of information corresponding to the magnitude of parameters such as temperature, humidity, current, voltage, and vibration, and typically lacks the time at which the data was acquired. The absence of time information in sensor data can cause significant difficulties in data analysis and monitoring, such as estimating the time when abnormal conditions occurred. The characteristics of sensor data can change depending on the environment and time. When analyzing sensor data to predict and determine the state, sensor gateways equipped with only a single data analysis rule struggle to maintain the accuracy of data analysis because it is difficult to respond appropriately to changes in the data acquisition environment, such as modifying the analysis rule or adjusting parameters. The background technology of the present invention is disclosed in Korean Registered Patent Publication No. 10-2020-0001304 (January 6, 2020). FIG. 1 is a block diagram of a sensor gateway according to one embodiment of the present invention. FIG. 2 is a diagram showing a path delay time measurement procedure according to an embodiment of the present invention. FIG. 3 is a diagram showing the relationship between the timestamp at the time of receiving the sensing value and the timestamp at the time of acquiring the sensing value according to one embodiment of the present invention. FIGS. 4 to 6 are drawings illustrating examples of sensor rule mapping according to an embodiment of the present invention. Hereinafter, an embodiment of a sensor gateway according to an embodiment of the present invention is described. In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intention or convention of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the invention in the drawings, parts unrelated to the description have been omitted, and similar parts throughout the specification have been given similar reference numerals. Throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. The implementations described herein may be implemented, for example, as methods or processes, devices, software programs, data streams, or signals. Even if discussed only in the context of a single form of implementation (e.g., discussed only as a method), the implementation of the discussed features may also be implemented in other forms (e.g., devices or programs). Devices may be implemented in appropriate hardware, software, and firmware, etc. Methods may be implemented in devices such as processors, which generally refer to processing devices including, for example, computers, microprocessors, integrated circuits, or programmable logic devices. FIG. 1 is a block diagram of a sensor gateway according to one embodiment of the present invention. Referring to FIG. 1, a sensor gateway according to one embodiment of the present invention may include a processor (100), an upper interface unit (200), a data processing unit (300), a sensor rule mapping unit (400), a sensor interface (500), a PTP (Precision Time Protocol) processing unit (600), a drift correction unit (700), and a timestamp unit (800). A sensor gateway according to one embodiment of the present invention may be installed between a higher-level management device and a sensor of a field facility in a management system for managing the status of field facilities, such as power distribution network transmission lines, but is not specifically limited thereto. The processor local bus (CPU local bus) can transmit and receive data such as commands and responses between the processor (100) and other functional units, for example, an upper interface uni