Electricity: measuring and testing – Testing potential in specific environment – Voltage probe
Patent
1991-04-09
1993-10-26
Strecker, Gerard R.
Electricity: measuring and testing
Testing potential in specific environment
Voltage probe
324115, 324128, 324247, 324258, 324260, 340600, G01R 3302, G01R 2908, G01R 3102, G01R 1300
Patent
active
052569608
ABSTRACT:
The invention discloses a magnetic field radiation monitor which comprises at least one sense coil adapted to sense magnetic flux from the electromagnetic field to be measured for both ELF and VLF type of fields. The sense coil is coupled to a detection circuit wherein an EMF generated in the sense coil will be amplified and frequency compensated in the circuit to give an extremely flat frequency response allowing accurate detection of complex magnetic fields. The circuit consists of an ELF and VLF stage, both selectively coupled to the sense coil and incorporated into the circuit by a user activated switch. The output of either the ELF or VLF stages is further processed and the output is provided to a display to indicate the magnetic field strength measured. The magnetic field radiation monitor may be calibrated to yield a true RMS measuring platform using a RMS detector circuit which will give an accurate indication of magnetic energy content for complex waveforms. An isotropic monitor may be provided where the configuration of the sense coil is designed to provide a non-directional magnetic sensor and appropriate detection circuitry to determine the total magnetic flux density detected by the magnetic sensor. The isotropic magnetic field radiation monitor will simplify use of the apparatus and will provide more accurate electromagnetic field measurements while maintaining the cost effectiveness of the apparatus.
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