Method and apparatus for using stochastic excitation and a superconducting quantum interference device (SAUID) to perform wideband frequency response measurements
September 8, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesRotating SQUID magnetometers and gradiometers Magnetic field gradiometer with trimming element SQUID Canister with conical coupling cavity Integrated miniature DC SQUID susceptometer for measuring properties of very small samples Device for the multi-channel measurement of weak variable magnetic fields with squids and superconducting gradiometers arranged on a common substrate Measuring device having a squid magnetometer with a modulator for measuring magnetic fields of extremely low frequency Circuit for detecting AC magnetic field due to magnetic resonance with a variable resistance for noise suppression Superconducting DC SQUID magnetometer working in liquid nitrogen Superconductive quantum interference device for the non-destructive evaluation of metals Apparatus and methodology for the non-contact testing of materials for superconductivity by detecting odd harmonics above a threshold InventorsApplicationNo. 941527 filed on 09/08/1992US Classes:324/239, Induced voltage-type sensor324/224, With temperature control of material or element of test circuit324/248, Superconductive magnetometers324/318, Spectrometer components327/527, Superconductive (e.g., cryogenic, etc.) device505/846Using superconductive quantum interference device (i.e., SQUID): (Class 324/248)ExaminersPrimary: Strecker, Gerard R.Assistant: Edmonds, Warren S. Attorney, Agent or FirmInternational ClassesG01R 033/12G01R 033/035 G01R 033/46 AbstractA stochastic excitation, SQUID detection system for determining the frequency response of a sample. A pair of counterwound detection coils are adjacent to an excitation coil. The sample is selectively placed in one of the detection coils for taking measurements. The SQUID sensor is a broadband, high sensitivity device which enables the frequency response of the sample to be determined over a wide bandwidth with a single measurement.Other References
Field of SearchSusceptibilityCalibration Permanent magnet testing Induced voltage-type sensor Plural sensors Superconductive magnetometers Magnetic field detection devices With support for article Magnetic test structure elements Using a magnetometer To determine direction Superconductors Spectrometer components Random access (i.e., bit organized memory type): (Class 365/160) Measuring and testing: (Classes 73, 324, 356, and 374) Electrical: (Class 324) Nuclear magnetic resonance (NMR) system or device: (Class 324) Magnetometer: (Class 324/248) Using superconductive quantum interference device (i.e., SQUID): (Class 324/248) Josephson junction present Magnetic coil With three or more terminals Granular or powdered mixtures Wound, braided, or woven casing or housing | |
