Audio‐frequency magnetotelluric sounding—a case history at the Cavendish geophysical test range

Geophysics ◽  
1979 ◽  
Vol 44 (8) ◽  
pp. 1429-1446 ◽  
Author(s):  
D. W. Strangway ◽  
A. Koziar
Keyword(s):  
Electric Field ◽  
Test Site ◽  
Massive Sulfide ◽  
Audio Frequency ◽  
Southern Ontario ◽  
Test Range ◽  
Electric Field Sensors ◽  
Electric Field Sensor ◽  
Survey Results ◽  
Field Sensor

The Cavendish geophysical test site in southern Ontario, a highly conducting massive sulfide zone, has been studied using a variety of different geophysical prospecting methods. We present the results of an audio‐frequency magnetotelluric (AMT) survey which indicate adequate lateral resolution of the conductors. The two main conductive zones are most clearly detected when the electric field sensor is oriented normal to the zones, a feature that is characteristic of narrow buried bodies. When the electric field sensors were parallel to a conductor, the detection of narrow buried zones was limited. There is a clear indication of a broad low‐resistivity zone at depth between the two narrow, highly conducting zones. This interpretation is in general agreement with other survey results in this area.

The Numerical Simulation of Underwater Electric Field Sensor Calibration Traceability

2014 ◽  
Vol 548-549 ◽  
pp. 646-649
Author(s):  
Ping Hu ◽  
Rui Yong Yue ◽  
Ji Tian
Keyword(s):  
Numerical Simulation ◽  
Electric Field ◽  
Magnetic Field Gradient ◽  
Gradient Methods ◽  
Field Measurements ◽  
Test Methods ◽  
Sensor Calibration ◽  
Electric Field Sensors ◽  
Electric Field Sensor ◽  
Field Sensor

The traceability of underwater electric field sensors is to track the most essential reason for underwater electric field generated by the sensor.When exploring marine electromagnetic field by underwater electric field sensors ,the underwater electric field sensor calibration traceability of the underwater electric field directly affects the final research significance .Therefore,the underwater electric field sensor calibration traceability technique is very important.The underwater electric field sensor calibration traceability is still in its infancy in our country recently .In this paper,underwater electric field sensor calibration traceability based on Ohm's law and magnetic field gradient methods are proposed through theoretical analysis and numerical simulation,which provide test methods for our underwater electric field sensor calibration and solve the bottleneck problem of underwater electric field measurements.

scholarly journals An Integrated Photonic Electric-Field Sensor Utilizing a 1 × 2 YBB Mach-Zehnder Interferometric Modulator with a Titanium-Diffused Lithium Niobate Waveguide and a Dipole Patch Antenna

Crystals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 459 ◽  
Author(s):  
Jung
Keyword(s):  
Lithium Niobate ◽  
Electric Field ◽  
Optical Waveguides ◽  
Extinction Ratio ◽  
Rf Power ◽  
Applied Electric Field Strength ◽  
Electric Field Sensors ◽  
Electric Field Sensor ◽  
Electro Optic ◽  
Field Sensor

We studied photonic electric-field sensors using a 1 × 2 YBB-MZI modulator composed of two complementary outputs and a 3 dB directional coupler based on the electro-optic effect and titanium diffused lithium–niobate optical waveguides. The measured DC switching voltage and extinction ratio at the wavelength 1.3 μm were ~16.6 V and ~14.7 dB, respectively. The minimum detectable fields were ~1.12 V/m and ~3.3 V/m, corresponding to the ~22 dB and ~18 dB dynamic ranges of ~10 MHz and 50 MHz, respectively, for an rf power of 20 dBm. The sensor shows an almost linear response to the applied electric-field strength within the range of 0.29 V/m to 29.8 V/m.

scholarly journals Method for Localization Aerial Target in AC Electric Field Based on Sensor Circular Array

Sensors ◽  
2020 ◽  
Vol 20 (6) ◽  
pp. 1585
Author(s):  
Wenbin Zhang ◽  
Peng Li ◽  
Nianrong Zhou ◽  
Chunguang Suo ◽  
Weiren Chen ◽  
...  
Keyword(s):  
Electric Field ◽  
Localization Error ◽  
Circular Array ◽  
Distance Error ◽  
Electric Field Sensors ◽  
Safety Distance ◽  
Electric Field Sensor ◽  
Ac Electric Field ◽  
Measurement Principle ◽  
Field Sensor

The traditional method of using electric field sensors to realize early warning of electric power safety distance cannot measure the distance of dangerous sources. Therefore, aiming at the electric field with a frequency of 50 to 60 Hz (AC electric field), a new method for localization of aerial AC target by the capacitive one-dimensional spherical electric field sensor circular array is studied. This method can directly calculate the distance, elevation, and azimuth of the detector from the dangerous source. By combining the measurement principle of the spherical electric field sensor and the plane circular array theory, a mathematical model for the localization of aerial targets in an AC electric field is established. An error model was established using Gaussian noise and the effects of different layout parameters on the localization error were simulated. Based on mutual interference between sensors, minimum induced charge, and localization error, an optimal model for sensor layout was established, and it was solved by using genetic algorithms. The optimization results show that when the number of sensors is 4, the array radius is 20 cm, and the sensor radius is 1.5 cm, the ranging error is 8.4%. The detector was developed based on the layout parameters obtained from the optimization results, and the localization method was experimentally verified at 10 and 35 kV alarm distances. The experimental results show that when the detector is located at 10 kV alarm distance, the distance error is 0.18 m, the elevation error is 6.8°, and the azimuth error is 4.57°, and when it is located at 35 kV alarm distance, the distance error is 0.2 m, the elevation error is 4.8°, and the azimuth error is 5.14°, which meets the safety distance warning requirements of 10 and 35 kV voltage levels.

Transient Response of Electrostatic Field due to Collision ESD between Spherical Electrodes by using Bare-chip Optical Electric Field Sensor

2020 ◽  
Vol 140 (12) ◽  
pp. 599-600
Author(s):  
Kento Kato ◽  
Ken Kawamata ◽  
Shinobu Ishigami ◽  
Ryuji Osawa ◽  
Takeshi Ishida ◽  
...  
Keyword(s):  
Electric Field ◽  
Transient Response ◽  
Electrostatic Field ◽  
Electric Field Sensor ◽  
Field Sensor

A Single Chip LiNbO₃ Photonic 2D Electric Field Sensor Using Two Perpendicular Electrodes

2020 ◽  
Vol 32 (23) ◽  
pp. 1501-1504
Author(s):  
Jiahong Zhang ◽  
Dubing Yang ◽  
Changsheng Zhang ◽  
Zhengang Zhao
Keyword(s):  
Electric Field ◽  
Single Chip ◽  
Electric Field Sensor ◽  
Field Sensor

scholarly journals Graphene Electric Field Sensor Enables Single Shot Label-Free Imaging of Bioelectric Potentials

Nano Letters ◽  
2021 ◽  
Author(s):  
Halleh B. Balch ◽  
Allister F. McGuire ◽  
Jason Horng ◽  
Hsin-Zon Tsai ◽  
Kevin K. Qi ◽  
...  
Keyword(s):  
Electric Field ◽  
Single Shot ◽  
Label Free ◽  
Electric Field Sensor ◽  
Field Sensor ◽  
Bioelectric Potentials

Optical electric-field sensor using single &beta;-BaB<sub>2</sub>O<sub>4</sub> crystal

2012 ◽  
Author(s):  
Rong Zeng ◽  
Xiaoli Shen ◽  
Changsheng Li ◽  
Bo Wang
Keyword(s):  
Electric Field ◽  
Electric Field Sensor ◽  
Field Sensor

A Mode-localized DC Electric Field Sensor

2021 ◽  
pp. 113244
Author(s):  
Yongcun Hao ◽  
Chenggang Wang ◽  
Zheng Sun ◽  
Zhao Zhang ◽  
Jin Guo ◽  
...  
Keyword(s):  
Electric Field ◽  
Electric Field Sensor ◽  
Dc Electric Field ◽  
Field Sensor

Electric Field Sensor for Electromagnetic Pulse Measurement

2018 ◽  
Vol 36 (6) ◽  
pp. 614-622
Author(s):  
Dinesh Kumar ◽  
Neelam Rup Prakash ◽  
Sukhwinder Singh
Keyword(s):  
Electric Field ◽  
Electromagnetic Pulse ◽  
Pulse Measurement ◽  
Electric Field Sensor ◽  
Field Sensor
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