Accession Number : ADD010064

Title :   Radio Frequency Coupled Differential Sensor Coil.

Descriptive Note : Patent Application,


Personal Author(s) : Schmidt,Jimmy Q

Report Date : 08 Sep 1982

Pagination or Media Count : 14

Abstract : A radio frequency coupled differential sensor provides measurement of projectile muzzle velocity with substantially improved accuracy. The present differential sensor coil is designed to effectively suppress extraneous signals while at the same time detecting the passage of the projectile over a specific interval of time. The differential sensor coil utilizes two concentric single loop inductors in a configuration such that only the inner loop is responsive to the passage of the projectile, while the inner and outer loops are equally responsive to excitation from extraneous sources. An electrically coupled differential amplifier is used to cancel out the signals from the extraneous sources while amplifying the signal from the projectile. An object of the present invention is to provide a radio frequency coupled differential sensor coil for improved muzzle velocity measurements. (Author)

Descriptors :   *Patent applications, *Detectors, *Muzzle velocity, *Electric coils, *Projector charges, Coupling(Interaction), Electrical properties, Guns, Amplifiers, Measurement, Internal, Instrumentation, External, Coils, Loops, Accuracy

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE