Accession Number:

AD1135286

Title:

Advanced Magnetometer System

Descriptive Note:

[Technical Report, Interim Report]

Corporate Author:

GEOMETRICS INC.

Personal Author(s):

• Zhang, Rui
• Mhaskar, Rahul

Report Date:

2018-10-22

Pagination or Media Count:

22

Abstract:

Scalar magnetometers and Time-Domain Electromagnetic TDEM systems are proven and effective technologies used extensively in the field to detect, discriminate and classify unexploded ordnance UXO. However, it has not been possible to simultaneously run both sensors in close vicinity of each other due to the interruption of the magnetometer operation by the EM pulses. We propose a method minimizing the EM pulse interruption by developing advanced digital signal processing DSP techniques to drive the scalar magnetometer. The method requires the angle information of the magnetic field, which cannot be obtained using commercial scalar magnetometers. In the first phase of the project, we demonstrate the capability of extracting the field angle information based on intrinsic operating parameters of the magnetometer. Better than 0.02 deg sensitivity can be achieved in angle measurement at the optimal orientation of the magnetic field with a measurement time of 100 ms. The demonstrated angle measurement shows that it is possible to achieve the fast tracking of the EM pulse with our advanced scalar atomic magnetometer system.

Descriptors:

Subject Categories:

• Test Facilities, Equipment and Methods
• Electricity and Magnetism

Distribution Statement:

[A, Approved For Public Release]