Application of Wireless Transmission Technology in the Detection of Capacitive Charged Device

2014 ◽  
Vol 1049-1050 ◽  
pp. 691-694
Author(s):  
Jian Li Zhao ◽  
Quan Xin Bai ◽  
Peng Zhang
Keyword(s):  
Power System ◽  
Measurement Method ◽  
Detection Method ◽  
Wireless Transmission ◽  
Wireless Measurement ◽  
Charged Device ◽  
Synchronous Measurement

The capacitive device is a important equipment in the power system. Its working state is usually monitored by charged detection. However, the traditional detection method needs a lot of cable wiring for each test, which makes a big security hidden danger. In order to solve the problem, a new wireless measurement method based on 2.4G wireless and Bluetooth technology is proposed in this paper, which not only achieves wireless synchronous measurement of current and voltage, but also meets the requirements of capacitive equipment charged detection.

Study on Liquid Volume Measurement Based on Wireless Transmission and Hydraulic Sensors

2012 ◽  
Vol 263-266 ◽  
pp. 392-397
Author(s):  
Jie Luo ◽  
Yun Hui Wang ◽  
Qian Wen Zhao ◽  
Hui Guo ◽  
Fei She
Keyword(s):  
Measurement System ◽  
Measurement Method ◽  
Pressure Sensors ◽  
Volume Measurement ◽  
Wireless Transmission ◽  
Liquid Volume ◽  
Hydraulic Pressure ◽  
General Packet Radio Service ◽  
Service Module ◽  
Wireless Measurement

Based on hydraulic sensors and wireless transmission, a new wireless measurement method of liquid volume in a tank is introduced. This measurement system includes hydraulic pressure sensors, A/D converter, GPRS (General Packet Radio Service) module and upper monitor in a computer, from which the users can get aware of the liquid volume in a tank at any time. The measurement system has been built，calibrated and tested. The experimental results show that this measurement system works well and the measurement error is less than 1%.

The MOA Live Detection System Based on Wireless Synchronization

2015 ◽  
Vol 734 ◽  
pp. 46-51
Author(s):  
Yong Xing Cao ◽  
Hui Fen Liao ◽  
Qian Peng ◽  
Wei Wang ◽  
Liang He ◽  
...  
Keyword(s):  
Power System ◽  
Online Monitoring ◽  
Clock Synchronization ◽  
Detection System ◽  
Wireless Transmission ◽  
Lightning Protection ◽  
Monitoring Device ◽  
Safety Risks ◽  
The Status ◽  
Wireless Measurement

The MOA is the main lightning protection equipment in power system, The status is generally monitored by online monitoring and offline test in routine maintenance. Traditional MOA live detection requires a lot of wiring, and has operation problems and safety risks. A new distributed MOA online monitoring wireless measurement is presented in this paper, that is, 433M wireless transmission and GPS clock synchronization technology fulfill distributed wireless synchronization measurement in MOA online monitoring device. Focusing on the design principles, implementation methods and the device composition, it is indicated that the wireless synchronization testing result is same with wired synchronization testing result, which can meet the requirements of MOA online monitoring.

scholarly journals JOM-4S Overhauser Magnetometer and Sensitivity Estimation

Sensors ◽  
2021 ◽  
Vol 21 (22) ◽  
pp. 7698
Author(s):  
Xiaorong Gong ◽  
Shudong Chen ◽  
Shuang Zhang
Keyword(s):  
Magnetic Field ◽  
Direct Measurement ◽  
Measurement Method ◽  
Technical Specification ◽  
Estimation Method ◽  
Earth’S Magnetic Field ◽  
Sensitivity Estimation ◽  
Earth's Magnetic Field ◽  
Direct Measurement Method ◽  
Synchronous Measurement

The Overhauser magnetometer is a scalar quantum magnetometer based on the dynamic nuclear polarization (DNP) effect in the Earth’s magnetic field. Sensitivity is a key technical specification reflecting the ability of instruments to sense small variations of the Earth’s magnetic field and is closely related to the signal-to-noise ratio (SNR) of the free induction decay (FID) signal. In this study, deuterated 15N TEMPONE radical is used in our sensor to obtain high DNP enhancement. The measured SNR of the FID signal is approximately 63/1, and the transverse relaxation time T2 is 2.68 s. The direct measurement method with a single instrument and the synchronous measurement method with two instruments are discussed for sensitivity estimation in time and frequency domains under different electromagnetic interference (EMI) environments and different time periods. For the first time, the correlation coefficient of the magnetic field measured by the two instruments is used to judge the degree of the influence of the environmental noise on the sensitivity estimation. The sensitivity evaluation in the field environment is successfully realized without electrical and magnetic shields. The direct measurement method is susceptible to EMI and cannot work in general electromagnetic environments, except it is sufficiently quiet. The synchronous measurement method has an excellent ability to remove most natural and artificial EMIs and can be used under noisy environments. Direct and synchronous experimental results show that the estimated sensitivity of the JOM-4S magnetometer is approximately 0.01 nT in time domain and approximately 0.01 nT/ in frequency domain at a 3 s cycling time. This study provides a low-cost, simple, and effective sensitivity estimation method, which is especially suitable for developers and users to estimate the performance of the instrument.

Network attack detection method for power system terminal based on improved random forest

2021 ◽  
Author(s):  
Tong Yu ◽  
Ming Xie ◽  
Xin Li ◽  
Ying Ling ◽  
Dongmei Bin ◽  
...  
Keyword(s):  
Random Forest ◽  
Power System ◽  
Detection Method ◽  
Attack Detection ◽  
Network Attack

Synchronous Measurement Method of Trans-Micron Scale Mixed Particle Size

2020 ◽  
Vol 40 (7) ◽  
pp. 0712001
Author(s):  
赵蓉 Zhao Rong ◽  
潘科玮 Pan Kewei ◽  
杨斌 Yang Bin ◽  
平力 Ping Li ◽  
蔡小舒 Cai Xiaoshu
Keyword(s):  
Particle Size ◽  
Measurement Method ◽  
Synchronous Measurement

Low-Power WSN Measurement Node for Greenhouse

2013 ◽  
Vol 391 ◽  
pp. 501-504
Author(s):  
De Hai Chen ◽  
Wei Feng Chao
Keyword(s):  
Energy Consumption ◽  
Low Power ◽  
Wireless Transmission ◽  
Wireless Sensor ◽  
Transmission Model ◽  
Working Process ◽  
Operating Model ◽  
Active Model ◽  
Wireless Measurement ◽  
Reduce Energy Consumption

The component of the greenhouse wireless sensor network was introduced, as the same time, its working process was presented. The wireless measurement nodes were designed based on nRF9E5. The hardware and software of the actuator nodes were studied, and according to the wireless communication system characteristic designing the system of hardware and software. The system was also debugged and test run. To reduce energy consumption, low-power components and low-power wireless transmission model were utilized, and the node had two operating model: active model and standby model. The wireless measurement system is reliable and expansibility.

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