A real time non-invasive monitoring system for detection of hypovolemic state using RR interval variability in very low frequency ranges

2004 ◽  
Vol 58 ◽  
pp. S28-S30 ◽  
Author(s):  
Takemi Matsui ◽  
Bonpei Takase ◽  
Kousuke Hagisawa ◽  
Makoto Kikuchi ◽  
Minoru Suzuki ◽  
...  
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Low Frequency ◽  
Invasive Monitoring ◽  
Very Low Frequency ◽  
Non Invasive ◽  
Rr Interval

INVESTIGATION OF HAND KINEMATICS TOWARDS FRONT CRAWL SWIMMING USING NON-INVASIVE REAL-TIME MONITORING SYSTEM

2014 ◽  
Author(s):  
Rozaimi Ghazali ◽  
◽  
Asiah Mohd Pilus ◽  
Wan Mohd Bukhari Wan Daud ◽  
Mohd Juzaila Abd Latif ◽  
...  
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Real Time Monitoring ◽  
Front Crawl ◽  
Non Invasive ◽  
Hand Kinematics

scholarly journals Methodology: non-invasive monitoring system based on standing wave ratio for detecting water content variations in plants

Plant Methods ◽  
2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Yunjeong Yang ◽  
Ji Eun Kim ◽  
Hak Jin Song ◽  
Eun Bin Lee ◽  
Yong-Keun Choi ◽  
...  
Keyword(s):  
Water Content ◽  
Monitoring System ◽  
Standing Wave ◽  
Magnetic Particles ◽  
Experimental Plant ◽  
Invasive Monitoring ◽  
Monitoring Method ◽  
Non Invasive ◽  
Content Variation ◽  
Stem Water

Abstract Background Water content variation during plant growth is one of the most important monitoring parameters in plant studies. Conventional parameters (such as dry weight) are unreliable; thus, the development of rapid, accurate methods that will allow the monitoring of water content variation in live plants is necessary. In this study, we aimed to develop a non-invasive, radiofrequency-based monitoring system to rapidly and accurately detect water content variation in live plants. The changes in standing wave ratio (SWR) caused by the presence of stem water and magnetic particles in the stem water flow were used as the basis of plant monitoring systems. Results The SWR of a coil probe was used to develop a non-invasive monitoring system to detect water content variation in live plants. When water was added to the live experimental plants with or without illumination under drought conditions, noticeable SWR changes at various frequencies were observed. When a fixed frequency (1.611 GHz) was applied to a single experimental plant (Radermachera sinica), a more comprehensive monitoring, such as water content variation within the plant and the effect of illumination on water content, was achieved. Conclusions Our study demonstrated that the SWR of a coil probe could be used as a real-time, non-invasive, non-destructive parameter for detecting water content variation and practical vital activity in live plants. Our non-invasive monitoring method based on SWR may also be applied to various plant studies.

A Method for Determining Quasi-Static and Dynamic Riser Inclination Using Collocated Accelerometers and Angular Rate Sensors

2014 ◽  
Author(s):  
Scot McNeill ◽  
Paul Angehr ◽  
Dan Kluk ◽  
Tomokazu Saruhashi ◽  
Ikuo Sawada ◽  
...  
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Body Force ◽  
Angular Rate ◽  
Low Frequency ◽  
Monitoring Systems ◽  
Rate Data ◽  
Fatigue Monitoring ◽  
Inclination Angles ◽  
Force Components

A method is described for determining quasi-static and dynamic riser angles using measured data typically found in a riser fatigue monitoring system, specifically acceleration and angular rate data. Quasi-static riser inclination and orientation of the inclination plane are determined from the low frequency triaxial accelerations, containing measurement of the gravitational body force. Components of the gravitational body force along the accelerometer axes vary slowly with the riser quasi-static response. The slowly varying Euler angles are determined from the components of gravity along the three axes. Dynamic riser inclination along and transverse to the quasi-static inclination plane are determined by integration of the angular rates, followed by transformation into a coordinate system aligned with the quasi-static inclination plane. The quasi-static and dynamic inclination angles are combined to arrive at the time trace of riser inclination angles. Following implementation of the method in Matlab®, the procedure was validated and the program verified using laboratory test data. A double-gimbaled platform was constructed, on which were mounted a triaxial accelerometer, biaxial angular rate and biaxial inclinometer (reference sensor). A battery of static and dynamic tests was carried out on the platform. Machinists’ levels and angle gauges were used to set the inclination in the various tests. The angles derived from the acceleration and angular rate data were compared to those of the reference inclinometer. Angle estimates were shown to match the reference angles with negligible error. The method was then implemented into the real-time Riser Fatigue Monitoring System (RFMS) aboard the Chikyu drillship. The algorithm was run using data from an emergency disconnect event that occurred in November, 2012. Quasi-static riser inclination angles were quite large due to high currents near the sea surface. Dynamic riser inclination angles proved to be significant due to Vortex Induced Vibration of the lower portion of the riser that immediately followed the disconnect event. It is important to note that the method uses data that is typically already included in real-time riser monitoring systems. Therefore only a software update is required to provide real-time riser angle information. If the method is built into data processing routines for real-time riser monitoring systems, the need for additional instrumentation, such as inclinometers near flex joints, may be circumvented. On the other hand, if inclinometers already exist, the method serves as an independent source of riser angle information at several locations on the riser. The method can also be used to calculate riser and Blow out Preventer (BOP) stack angles from data recorded using stand-alone, battery-powered loggers.

The Applied Research of Real-Time Monitoring System for Earthquake

2010 ◽  
Vol 143-144 ◽  
pp. 837-840
Author(s):  
Ying Li Liu ◽  
Te Liang Yan ◽  
Zhen Jiang
Keyword(s):  
Seismic Response ◽  
Real Time ◽  
Monitoring System ◽  
Strong Earthquake ◽  
Applied Research ◽  
Low Frequency ◽  
Observation System ◽  
Low Frequencies ◽  
Earthquake Observation ◽  
Type Apparatus

In the vibration isolating foundation buildings, build strong earthquake observation system, at the same time, join the seismic observation to this system, underground observation is carrying along with the observation of the seismic response on the ground and the buildings. The dynamic accelerator-type apparatus applied in the system, comes into being an accelerator-characteristics from 0.05HZ to 50HZ by electronics feeding back, enormously decrease affects of super low frequency interference and the linear and dynamic ranges can suffice the actual functions, avoids obviously errors of displacement-type apparatus in low frequencies, acquires satisfied effects.

A non-invasive monitoring system

2007 ◽  
Author(s):  
Christopher Paul Hancock ◽  
Sabih Chaudhry
Keyword(s):  
Monitoring System ◽  
Invasive Monitoring ◽  
Non Invasive
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