http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
리드 스위치 센서를 이용한원격 검침용 상수도 계량기에서 채터링 오차 감소 방안 연구
Odgerel Ayurzana,김희식 대한전자공학회 2007 電子工學會論文誌-SC (System and control) Vol.44 No.4
To reduce the chattering errors of reed switch sensors in the automatic remote measurement of water meter, a reed switch sensor was analyzed and improved. The operation of reed switch sensors can be described as a mechanical contact switch by approximation of permanent magnet piece to generate an electrical pulse. The reed switch sensors are used mostly in measurement application to detect the rotational or translational displacement. To apply for water flow measurement devices, the reed switch sensors should keep high reliability. They are applied for the electronic digital type of water flow meters. The reed switch sensor is just mounted simply on the conventional mechanical type flow meter. A small magnet is attached on a pointer of the water meter counter rotor. Inside the reed sensor, two steel leaf springs make mechanical contact and apart repeatedly as rotation of flow meter counter. The counting electrical contact pulses can be converted as the water flow amount. The MCU sends the digital flow rate data to the server using the wireless communication network. But the digital data is occurred difference or errors by chattering noise. The reed switch sensor contains chattering error by it self at the force equivalent position. The vibrations such as passing vehicle near to the switch sensor installed location causes chattering. In order to reduce chattering error, most system uses just software methods, for example using filter algorithm and also statistical calibration methods. The chattering errors were reduced by changing leaf spring structure using mechanical hysteresis characteristics. 상수도 원격 검침에서는 리드 스위치의 채터링 오차를 감소시키기 위한 센서 연구 및 개선이 필요하다. 센서의 동작은 전기적 펄스를 발생시키기 위한 영구 자석 주각의 접근에 의한 기계적 접촉스위치처럼 나타낼 수 있다. 대부분 회전 또는 전달 이동을 잡기 위해 사용되고 수류 측정 장치에 적용하기 위해서는 높은 신뢰성이 필수이다. 동작 형태를 간단히 설명하게 되면 미터기 작동 모터 끝에 달려있는 작은 자석이 미터기 회전에 의해 리드 스위치 내부에 있는 두 개의 스프링과 기계적 접촉 형식으로 반복적으로 떨어지게 된다. 즉 수류량에 따라 펄스의 수가 증가하는 것이다. 이렇게 측정된 값은 무선 이동 통신을 통해 서버로 전달되게 된다. 문제는 자석과 리드 스위치가 만나는 지점에서 스위치가 멈추게 되면 떨리면서 펄스가 잘못 올라가는 오차가 생기는 것이다. 이러한 오차를 감소시키기 위해 보통 소프트웨어적인 방법을 사용한다. 필터 알고리듬을 사용하는 것과 통계적인 보정방법을 사용하는 것이 그러한 예이다. 하지만 그러한 방법보다는 하드웨어적으로 문제를 해결하는 것이 오차를 줄일 수 있는 더 직접적인 방법이다. 본 논문에서는 기계적인 이력현상의 특성을 이용하여 리프 스프링 구조의 변화로 오차를 감소시키는 연구를 수행하였다.
Monitoring System of Agriculture Fields using ZigBee Modules
Ayurzana, Odgerel,Tsagaanchuluun, Sugir The Institute of Internet 2021 International journal of advanced smart convergenc Vol.10 No.1
The goal of this study is to develop experiment monitoring system of agriculture fields using ZigBee wireless modules. Soil moisture, ambient temperature, atmospheric pressure and intensity of sunlight are the most important factorsto grow a wheat crop and other vegetables. In orderto monitorthe factorssoil moisture (YL69), air pressure (BMP180), temperature (DS18B20), photoresistor were used for sensing environment data. The TI CC2530 RF SoC chip was used in the system. ZigBee modules were connected to star topology. ZigBee modules send data wirelessly to a data center. This data can be displayed and analyzed on the main monitoring program as needed also sent to the client mobile. Characteristics of the sensors were determined by experiment results.
Monitoring System of Agriculture Fields using ZigBee Modules
Odgerel Ayurzana,Sugir Tsagaanchuluun 한국인터넷방송통신학회 2021 Journal of Advanced Smart Convergence Vol.10 No.1
The goal of this study is to develop experiment monitoring system of agriculture fields using ZigBee wireless modules. Soil moisture, ambient temperature, atmospheric pressure and intensity of sunlight are the most important factors to grow a wheat crop and other vegetables. In order to monitor the factors soil moisture (YL69), air pressure (BMP180), temperature (DS18B20), photoresistor were used for sensing environment data. The TI CC2530 RF SoC chip was used in the system. ZigBee modules were connected to star topology. ZigBee modules send data wirelessly to a data center. This data can be displayed and analyzed on the main monitoring program as needed also sent to the client mobile. Characteristics of the sensors were determined by experiment results.
Reed Switch 센서를 이용한 원격 검침용 상수도 계량기에서 Chattering 오차 감소 방안 연구
Odgerel Ayurzana,권종원(Jong-Wok Kwon),박용만(Yong-Man Park),구상준(Sang-Jun Koo),김희식(Hie-Sik Kim) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.4
To reduce the chattering errors of reed switch sensors used for automatic remote measurement of water supply system, a reed switch sensor was analyzed and improved. The operation of reed switch sensors can be described as a mechanical contact by approximation of permanent magnet piece to generate an electrical pulse. The reed switch sensors are used in measurement application by detecting the rotational or translational displacement. To apply for flow measurement devices, the reed switch sensors should keep high reliability. They are applied for the electronic digital type of water flow meters. The reed switch sensor is just installed simply on the mechanical type flow meter. A small magnet is attached on a pointer of the water meter counter rotor. Inside the reed sensor, two steel leaf springs make mechanical contact and apart as rotation of flow meter counter. The counting electrical contact pulses can be converted as the water flow amount. The MCU sends the digital flow rate data to the server using the wireless communication network. But it occurs data difference or errors by chattering noise. The reed switch sensor contains chattering error by it self at the force equivalent position. The vibrations such as passing car near to the switch sensor installed location. In order to reduce chattering error, most system uses just software methods for example using filter and also statistical calibration methods. The chattering errors were reduced by changing leaf spring structure using mechanical hysteresis characteristics.
Improvement of Data Receive Ratio in Remote Water Meter System by Upgrading Sensor
김희식,Odgerel Ayurzana 제어·로봇·시스템학회 2009 International Journal of Control, Automation, and Vol.7 No.1
A remote Automatic Meter Reading (AMR) system was developed for water supply organizations and implemented in the field. To improve data acquisition, a water AMR sensor was modified. A water meter sensor with lower noise was introduced and efficient wireless transmission was studied. Low reliability of data acquisition was the most difficult problem in the field. A success ratio of at least 98% is required for stable and economical operation of an AMR. The ratio of reliable data acquisition in a trial AMR with image acquisition using a digital camera was only 67.8%, but tests using the improved sensor showed a reliable acquisition ratio of up to 97.38%. The MR (Magnetic Resistive) Reed switch and CYBLE sensor modules were simply mounted on mechanical water meters to achieve remote metering. The terminal was connected by a cable to the meter. For short distance transmission to a collector, RF (Radio Frequency) and Zigbee modules were used. For long distance transmission to a server, a CDMA cellular network was employed.