• Title/Summary/Keyword: meter data

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A Study on Measurement Accuracy and Required Time based on SCPI of Power Meter in Ka Band (Ka 밴드에서 Power Meter 계측 명령어에 따른 측정 정확도와 소요시간에 대한 연구)

  • Cho, Tae-Chong;Shin, Suk-Ho
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.20 no.5
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    • pp.51-56
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    • 2020
  • Measurement accuracy and required time is important to make ATE(Automatic test equipment) system in Ka band, and SCPI commands of power meter which is a representative RF test equipment are studied in this paper. Comparison data between FETCH and MEASURE which are SCPI commands are measured in 30 G ~ 31 GHz and -70 ~ +20 dBm using two power sensor. The data show that FETCH which is the fastest SCPI is able to get reliable data in linear interval above noise level. MEASURE which is the best accurate command takes longer time than FETCH, and the longest time is 13.2 seconds. These results offer that measurement accuracy and required time of the two SCPI for power meter and would be used as a guideline for efficient ATE system in Ka band.

An Experimental Study on the Measurement of Temperature and Thermal Stress of Wall Type Mass Concrete Structure (벽체형 매스콘크리트구조물의 온도 및 온도응력측정에 관한 실험적 연구)

  • 강석화;이용호;정한중;박칠림
    • Proceedings of the Korea Concrete Institute Conference
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    • 1995.10a
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    • pp.173-177
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    • 1995
  • Thermal cracks ard occured when thermal stress due to the hydration of cement exceeds the tensile strength of concrete. Since cracking causes poor durability of concrete, the effect of thermal cracking should be included for the desing and construction of massive concrete structures. In this study, an experiments are performed for the investigation of time dependent temperature and thermal stress of massive concrete structure at early ages. In order to measure temperatures and thermal stresses, concrete stress meter, embedded strain meter, non-stress meter, and thermocouples are used. Based on the analyses of measured thermal stress data, measured values by concrete stress meter are more reliable than those by embedded strain meter and non-stress meter, And measured values by concrete stress meter are compared with the calculated values by FEM program developed by DICT (DWTS2D). Calculated values by DWTS2D show good agreement with measured values.

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Spatio-temporal Load Analysis Model for Power Facilities using Meter Reading Data (검침데이터를 이용한 전력설비 시공간 부하분석모델)

  • Shin, Jin-Ho;Kim, Young-Il;Yi, Bong-Jae;Yang, Il-Kwon;Ryu, Keun-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.11
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    • pp.1910-1915
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    • 2008
  • The load analysis for the distribution system and facilities has relied on measurement equipment. Moreover, load monitoring incurs huge costs in terms of installation and maintenance. This paper presents a new model to analyze wherein facilities load under a feeder every 15 minutes using meter reading data that can be obtained from a power consumer every 15 minute or a month even without setting up any measuring equipment. After the data warehouse is constructed by interfacing the legacy system required for the load calculation, the relationship between the distribution system and the power consumer is established. Once the load pattern is forecasted by applying clustering and classification algorithm of temporal data mining techniques for the power customer who is not involved in Automatic Meter Reading(AMR), a single-line diagram per feeder is created, and power flow calculation is executed. The calculation result is analyzed using various temporal and spatial analysis methods such as Internet Geographic Information System(GIS), single-line diagram, and Online Analytical Processing (OLAP).

Development of LoRa IoT Automatic Meter Reading and Meter Data Management System for Smart Water Grid (스마트워터그리드를 위한 LoRa IoT 원격검침 및 계량데이터 시스템 개발)

  • Park, Jeong-won;Park, Jae-sam
    • Journal of Advanced Navigation Technology
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    • v.26 no.3
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    • pp.172-178
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    • 2022
  • In this paper, water meter AMR(automatic meter reading), one of the core technologies of smart water grid, using LoRa IoT network is studied. The main content of the research is to develop the network system and show the test results that one PC server receives the readings of water meters from multiple households through LoRa communication and stores them in the database, and at the same time sends the data to the web server database through internet. The system also allows users to monitor the meter readings using their smartphones. The hardware and firmware of the main board of the digital water meter are developed. For a PC server program, MDMS(meter data management system) is developed using Visual C#. The app program running on the user's smartphone is also developed using Android Studio. By connecting each developed parts, the total network system is mounted on a flow test bench in the laboratory and tested. For the fields test, 5 places around the university are selected and the transmission distances are tested. The test result show that the developed system can be applied into the real field. The developed system can be expanded to various social safety nets such as monitoring the living alone or elderly with dementia.

Automatic Piped Water Meter Reading System Based on IEEE 802.15.4 Protocol (IEEE 802.15.4 Protocol 기반 원격 수도검침 System)

  • Seon, Yong-Ju;Lee, Ho-Eung;Park, Soo-Jin;Park, Hyun-Ju
    • 한국HCI학회:학술대회논문집
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    • 2008.02a
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    • pp.304-308
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    • 2008
  • In this paper, we present measurement method of the amount of used piped water and the communications environment for automatic piped water meter reading. The existing piped water meter reading which is carried out by the human in person by monitoring the amount of use and recording make the problem of an error of the figure and being short of staffed to carry out piped water meter reading. To solve the existing problem in this paper, the amount of used piped water is converted into data type by Photo Interrupt Sensor, and IEEE 802.15.4 Protocol is used to confirm the measurement in remote place.

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Development of Automatic Meter Reading and Meter Data Management System for Advanced Metering Infrastructure (첨단계랑인프라를 위한 원격검침 및 계량데이터관리 시스템 개발)

  • Park, Jae-Sam
    • The Journal of the Korea institute of electronic communication sciences
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    • v.12 no.5
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    • pp.829-836
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    • 2017
  • This paper is a study on development of a new structured AMR/AMI(automatic meter reading/advance metering infrastructure) system. The developed system has a faster reading and is cheaper and easier to install compared to the existing AMR/AMI system. The system can be applied to AMR/AMI for five kinds of meters, electricity, gas, water, hot-water and calorie meter, which are used in most Korean households. Test results show that the developed system is both economical and reliable both in theoretical and practical applications. The resuts also show that the developed system is more suitable than existing system for AMR/AMI applications.

Development of the Remote Meter Reading System Using a Power Line Communication and PSTN (전력선 통신과 공중 전화망에 의한 전력량의 원격 검침 시스템의 개발)

  • 박종연;조호찬;최승지
    • Proceedings of the IEEK Conference
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    • 2002.06e
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    • pp.103-106
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    • 2002
  • This paper has studied a remote AMR(Automatic Meter Reading) system using the power line and the telephone line as a communication media and the digital power meter. In the developed system, because we have used the power line and telephone, the facility is very easy and then its cost is not expensive. The system includes following elements: a digital power meter, an indoor communication system using a power line modem and a telephone line interface system for sending data to the utility company.

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Implementation of Secure System for Blockchain-based Smart Meter Aggregation (블록체인 기반 스마트 미터 집계 보안 시스템 구축)

  • Kim, Yong-Gil;Moon, Kyung-Il
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.20 no.2
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    • pp.1-11
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    • 2020
  • As an important basic building block of the smart grid environment, smart meter provides real-time electricity consumption information to the utility. However, ensuring information security and privacy in the smart meter data aggregation process is a non-trivial task. Even though the secure data aggregation for the smart meter has been a lot of attention from both academic and industry researchers in recent years, most of these studies are not secure against internal attackers or cannot provide data integrity. Besides, their computation costs are not satisfactory because the bilinear pairing operation or the hash-to-point operation is performed at the smart meter system. Recently, blockchains or distributed ledgers are an emerging technology that has drawn considerable interest from energy supply firms, startups, technology developers, financial institutions, national governments and the academic community. In particular, blockchains are identified as having the potential to bring significant benefits and innovation for the electricity consumption network. This study suggests a distributed, privacy-preserving, and simple secure smart meter data aggregation system, backed up by Blockchain technology. Smart meter data are aggregated and verified by a hierarchical Merkle tree, in which the consensus protocol is supported by the practical Byzantine fault tolerance algorithm.

Development of Oil Content Meter for Oily Water Separator in Ship (선박 유수분리기용 유분검출기의 개발)

  • 황정웅;정병건;김창화
    • Journal of Advanced Marine Engineering and Technology
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    • v.25 no.2
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    • pp.338-344
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    • 2001
  • According to the MARPOL 73/78 of Convention, all ships should have oil filtering equipment and 15 ppm bilge which satisfy Requirements of MARPOL 73/78. This study is concerned with designing and manufacturing a prototype Oil content Meter(OCM) used in machinery area of ship. The prototype OCM is composed of two parts which are oil content sensing module and data processing unit. The oil content sensing module consists of infra-red light source, photo-diode light receivers, and a glass tube for bilge water sample. The data processing unit has a micro-processor as hard core and peripheral devices. The experimental results of prototype OCM and analysis of collected data reveal linear property between transmitted light and scattered light as long as the bilge water has low level content of oil. And this linear property leads to a oil content detecting method which is programmed and loaded into the data processing unit. The performance of the prototype OCM is compared with that of the commercial OCM in the market.

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Computational Fluid Dynamics of Hydraulic Valve Meter (밸브 수압측정기의 유동해석)

  • Lee, Jong-Sun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.13 no.5
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    • pp.1963-1968
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    • 2012
  • In this research paper a hydraulic valve meter for the measurement of water pressure in fields was designed by using three dimensional automatic design program CATIA. And, also computational fluid dynamics was applied to the designed hydraulic valve meter in order to obtain flow distributions due to internal pressures. This analytical results will be provided as fundamental data in the development of new concepts of hydraulic valve meter and the hydraulic valve meter in development may reduce valve checking times and improve safety by preventing accidents earlier.