Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1996-06-11
1999-03-02
O'Shea, Sandra L.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
600 14, 1286531, G01N 2772, G01R 3312
Patent
active
058776273
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns a device for determining the effect of pulsed magnetic fields on an organism.
Pulsating magnetic fields affecting an organism are, for example, of particular interest with regard to the transport of ions from intracorporeal fluids into and through the vessel walls and membranes of organisms which surround these fluids. Devices for this purpose have been described, for example, in German published document 42 21 739 A1. This laid open document also describes devices for determining the effect of such magnetic fields. For this purpose, the organism is either subjected to an approximately sinusoidal signal in the frequency range of 100 kHz during the pulse intervals, and the corresponding received signal is picked up by a measurement coil, or the measurement coil is used with a suppression circuit to pick up the secondary field signal which is induced in the measurement coil following each impulse in the primary magnetic field by means of the secondary and transient magnetic field arising within the organism.
The present invention concerns a further development of such a device, with the aim of increasing the amount of information conveyed by the measurement results.
SUMMARY OF THE INVENTION
The device for determining the effect of pulsed primary magnetic fields on an organism according to the present invention is primarily characterized by: organism in response to the primary magnetic fields; magnetic field signals such that the sequential secondary magnetic field signals are combined to a cumulative signal in the memory unit; and circuit.
The measuring pick-up is preferably a measuring coil.
The evaluation circuit has a suppression circuit connected between the measuring pick-up and the memory unit, the suppression circuit comprising a control unit for allowing processing of the sequential secondary magnetic field signals only in a periods of rest after the primary magnetic pulses.
Preferably, the control device is designed such that the cumulative signal is a mean value of the sequential secondary magnetic field signals.
Expediently, the control device comprises a correlator for calculating the mean value, wherein the correlator performs an algebraic addition for the sequential secondary magnetic field signals and a geometric addition for disruptive signals.
The evaluation circuit, the memory unit and the control device are designed such that an amplitude of the sequential secondary magnetic field signals is determined.
Advantageously, the evaluation circuit, the memory unit and the control device are designed such that an energy contents of the sequential secondary magnetic field signals is determined.
The evaluation circuit, the memory unit and the control device are designed such that differential signals are calculated from the sequential secondary magnetic field signals and the differential signals are saved.
The device preferably further comprises a second memory device for saving the cumulative signals.
The evaluation circuit and the control device are designed such that, at the beginning of subjecting the organism with the pulsed primary magnetic fields, the cumulative signals are sent to the second memory device.
The evaluation circuit and the control device are designed such that, at the end of subjecting the organism with the pulsed primary magnetic fields, the cumulative signals are sent to the second memory device.
The evaluation circuit and the control device are designed such that, at the beginning and the end of subjecting the organism with the pulsed primary magnetic fields, the cumulative signals are sent to the second memory device.
The second memory device is preferably detachable from the device, and, in a preferred embodiment, is a chip card.
The second memory device comprises a plurality of sectors, wherein a first one of the sectors saves the cumulative signals as measured values, a second sector saves treatment parameters, and a third sector saves personal data of the organism.
The device may also further comprise a cir
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patent: 4819648 (1989-04-01), Ko
patent: 4969469 (1990-11-01), Mills
patent: 4985678 (1991-01-01), Gangarosa et al.
patent: 5073858 (1991-12-01), Mills
patent: 5152288 (1992-10-01), Hoenig et al.
patent: 5480373 (1996-01-01), Fischer et al.
Fischer Gerhard
Warnke Ulrich
Dr. Fischer Aktiengesellschaft
O'Shea Sandra L.
Patidar Jay M.
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