Development of methods and instruments for noninvasive magnetopneumography of coal mine dust in the lungs of coal workers. Progress report, September 15, 1983-September 14, 1984

Technical Report · Wed Aug 01 04:00:00 EDT 1984

OSTI ID:6801769

Freedman, A P; Robinson, S E

Progress was made in improved magnetometer sensors, fabrication of printed circuit boards for instrumentation, start of construction of new MPG scanner, improved mathematical solution for lung dust from MPG measurements, improved techniques for measuring lungs clearance by MPG. The instrumentation package for field portable magnetopneumography is nearly complete. This package consists of five two-axis low-noise fluxgate magnetometer sensors and their support electronics, a microprocessor controller, and a capacitive-discharge electromagnet power supply. These electronics have been designed to interface with a portable MPG scanner for non-invasive determination of coal mine dust and coal fly ash in the lungs of workers. After successful construction of prototype magnetometers, printed circuit boards have been fabricated for the electronics to be used in the field. The fluxgate sensor noise, previously reported by us to range from 10.1 to 18.9 pT rms per root Hz (dc to 10 Hz bandwidth), has been improved considerably after rewinding and reannealing sensor cores. A typical noise performance of 4 to 6 pT rms per root Hz (same bandwidth) is now seen. 5 figures.

• Research Organization: Hahnemann Univ. Hospital, Philadelphia, PA (USA)
• DOE Contract Number: AC02-81ER60029
• OSTI ID: 6801769
• Report Number(s): DOE/ER/60029-3; ON: DE84017031
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
016000 -- Coal
Lignite
& Peat-- Health & Safety
550600* -- Medicine
62 RADIOLOGY AND NUCLEAR MEDICINE
BODY
BODY BURDEN
CHALCOGENIDES
CLEARANCE
COAL MINERS
CONSTRUCTION
DESIGN
DIAGNOSTIC TECHNIQUES
DUSTS
EXCRETION
FLUXGATE MAGNETOMETERS
IN VIVO
IRON COMPOUNDS
IRON ORES
IRON OXIDES
LUNG CLEARANCE
LUNGS
MAGNETITE
MAGNETOMETERS
MEASURING INSTRUMENTS
MINERALS
MINERS
ORES
ORGANS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PERSONNEL
RESPIRATORY SYSTEM
TRANSITION ELEMENT COMPOUNDS