Accurate voltage-to-frequency sensor with galvanic isolation and bandwidth of 375kHz

2020 ◽  
Author(s):  
Decheng Yan ◽  
Liran Zheng ◽  
Rajendra Prasad Kandula ◽  
Deepak Divan
Keyword(s):  
Frequency Sensor

scholarly journals How Good Is the STW Sensor? An Account from a Larger Shipping Company

2021 ◽  
Vol 9 (5) ◽  
pp. 465
Author(s):  
Angelos Ikonomakis ◽  
Ulrik Dam Nielsen ◽  
Klaus Kähler Holst ◽  
Jesper Dietz ◽  
Roberto Galeazzi
Keyword(s):  
High Frequency ◽  
Additional Data ◽  
Empirical Method ◽  
Influential Factor ◽  
Sensor Data ◽  
Sea State ◽  
Shipping Company ◽  
Frequency Sensor ◽  
Semi Empirical

This paper examines the statistical properties and the quality of the speed through water (STW) measurement based on data extracted from almost 200 container ships of Maersk Line’s fleet for 3 years of operation. The analysis uses high-frequency sensor data along with additional data sources derived from external providers. The interest of the study has its background in the accuracy of STW measurement as the most important parameter in the assessment of a ship’s performance analysis. The paper contains a thorough analysis of the measurements assumed to be related with the STW error, along with a descriptive decomposition of the main variables by sea region including sea state, vessel class, vessel IMO number and manufacturer of the speed-log installed in each ship. The paper suggests a semi-empirical method using a threshold to identify potential error in a ship’s STW measurement. The study revealed that the sea region is the most influential factor for the STW accuracy and that 26% of the ships of the dataset’s fleet warrant further investigation.

A Low-Power Voltage-Clamped CMOS pH to Frequency Sensor

2019 ◽  
Author(s):  
Shaghayegh Aslanzadeh ◽  
Ava Hedayatipour ◽  
Shahram Hatefi Hesari ◽  
Nicole McFarlane
Keyword(s):  
Low Power ◽  
Frequency Sensor

scholarly journals Enhancement of Island Microgrid Operation by Frequency-sensor-based Controller of Battery Storage System

2020 ◽  
Vol 32 (5) ◽  
pp. 1689
Author(s):  
Cheng-Ting Hsu ◽  
Tsun-Jen Cheng ◽  
Hung-Ming Huang
Keyword(s):  
Storage System ◽  
Battery Storage ◽  
Frequency Sensor

scholarly journals Potentialities of the ultrasonic examination by detection of the pain syndrome relapse causes in the late period of the disk herniation surgical treatment

2008 ◽  
Vol 7 (5-2) ◽  
pp. 454-456
Author(s):  
S. A. Fedyanin ◽  
G. I. Shumakher ◽  
A. S. Fedyanin ◽  
A. S. Malikov ◽  
L. V. Osintseva ◽  
...  
Keyword(s):  
Middle Age ◽  
Pain Syndrome ◽  
Spinal Canal Stenosis ◽  
Late Period ◽  
Disk Herniation ◽  
Ultrasonic Examination ◽  
Canal Stenosis ◽  
Frequency Sensor ◽  
Pathologic Alteration ◽  
Ultrasound Scanner

Checkup of 63 patients with pain syndrome relapse in the late period of disk herniation surgery by posterior approach. Among them there were 38 women (60,3%) and 25 men (39,7%). Middle age (44,3 ± 1,1) years. Ultrasonic examination was carried on the ultrasound scanner «Sonoline-Elegka» («Siemens») with the multi — frequency sensor 2,5—5,0 megahertz. Ultrasonography displays in the late period of the disk herniation surgery in 65,1% cases disk herniation and protrusion, in 23,8% cases — the spinal canal stenosis, in 44,4% — radicular canals stenosis, in 46% cases — cicatrical epiduritis visualization. These pathologic alteration and combination of them are the main causes of the pain relapse in the late period of the disk herniation surgery.

scholarly journals Low-Frequency Vibration Sensor with a Sub-nm Sensitivity Using a Bidomain Lithium Niobate Crystal

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 614 ◽  
Author(s):  
Ilya Kubasov ◽  
Aleksandr Kislyuk ◽  
Andrei Turutin ◽  
Alexander Bykov ◽  
Dmitry Kiselev ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Excitation Frequency ◽  
Low Frequency ◽  
Vibration Sensor ◽  
Gravitational Acceleration ◽  
Frequency Sensor ◽  
Linear Behavior ◽  
Low Frequency Vibration ◽  
Acceleration Amplitude ◽  
Vibrational Excitations

We present a low-frequency sensor for the detection of vibrations, with a sub-nm amplitude, based on a cantilever made of a single-crystalline lithium niobate (LiNbO3) plate, with a bidomain ferroelectric structure. The sensitivity of the sensor-to-sinusoidal vibrational excitations was measured in terms of displacement as well as of acceleration amplitude. We show a linear behavior of the response, with the vibrational displacement amplitude in the entire studied frequency range up to 150 Hz. The sensitivity of the developed sensor varies from minimum values of 20 μV/nm and 7 V/g (where g = 9.81 m/s2 is the gravitational acceleration), at a frequency of 23 Hz, to peak values of 92.5 mV/nm and 2443 V/g, at the mechanical resonance of the cantilever at 97.25 Hz. The smallest detectable vibration depended on the excitation frequency and varied from 100 nm, at 7 Hz, to 0.1 nm, at frequencies above 38 Hz. Sensors using bidomain lithium niobate single crystals, as sensitive elements, are promising for the detection of ultra-weak low-frequency vibrations in a wide temperature range and in harsh environments.

scholarly journals Multimachine Data–Based Prediction of High-Frequency Sensor Signal Noise for Resistive Wall Mode Control in ITER

2016 ◽  
Vol 70 (3) ◽  
pp. 387-405 ◽  
Author(s):  
Yueqiang Liu ◽  
S. A. Sabbagh ◽  
I. T. Chapman ◽  
S. Gerasimov ◽  
Y. Gribov ◽  
...  
Keyword(s):  
High Frequency ◽  
Sensor Signal ◽  
Signal Noise ◽  
Mode Control ◽  
Resistive Wall Mode ◽  
Frequency Sensor ◽  
Resistive Wall
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