Patents
Sitemap › G01 - Measuring; Testing › G01R - Measuring electric variables; Measuring magnetic variables › G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503)
05/2014
05/06/2014US8718961 Frequency measurement method, frequency measurement device and apparatus equipped with frequency measurement device
05/06/2014US8718960 System and method of selecting white gaussian noise sub-band using singular value decomposition
05/06/2014US8717040 Method for instantaneously determining rates of distortion of signals on an AC electrical network, and associated device
05/06/2014US8717006 Method of performing synthetic instrument based noise analysis using proportional bandwidth spectrum analysis techniques
05/01/2014WO2014025436A3 Systems and methods for detecting transient acoustic signals
04/2014
04/30/2014DE102013217181A1 Verfahren und System zum Durchführen einer Spektralanalyse eines nicht stationären Signals in Echtzeit A method and system for performing a spectral analysis of a non-stationary signal in real-time
04/30/2014CN203572885U Conductivity/frequency converting circuit
04/30/2014CN203572878U FPGA circuit for achieving frequency measurement
04/30/2014CN203572877U Front interval frequency shift reception sensor
04/30/2014CN103760417A Simple AC signal phase acquisition circuit with frequency measurement function
04/30/2014CN103760414A Low-velocity pulse period collecting method based on anti-interference low-pass filtering
04/30/2014CN102411091B Device for detecting multi-channel signal stability and detection method
04/29/2014US8712717 Computer device with digitizer calibration system and method
04/24/2014US20140111184 Internal chirp generator with time aligned acquisition in a mixed-domain oscilloscope
04/24/2014DE102012020551A1 Prüfen eines Schaltkreises Check a circuit
04/23/2014EP2721422A1 Method and measuring device for suppressing interfering signals
04/23/2014CN103743949A Detection method of harmonic and inter-harmonic based on single-channel FastICA (Fast Independent Component Analysis)
04/23/2014CN103743471A Acoustical signal-based time parameter testing method during contactor motion process
04/23/2014CN102035554B System and method for metering and analyzing electric energy as well as analog-to-digital conversion circuit
04/22/2014US8706435 Signal detection and triggering using a difference bitmap
04/22/2014US8706434 Nonlinear systems measurement system and method
04/22/2014US8704533 Method and apparatus to measure differential phase and frequency modulation distortions for audio equipment
04/17/2014WO2014059153A1 Periodic time segment sequence based decimation
04/16/2014EP2720049A1 Device and method for alternating current physical quantity measurement and data collection
04/16/2014CN203551739U Simple multifunctional logic testing pen
04/16/2014CN203551660U An electrical parameter harmonic analyzer
04/16/2014CN203551659U Device capable of simultaneously testing three-phase harmonic wave and single-phase harmonic wave
04/16/2014CN203551658U Non-contact type AC neon-electroscope having frequency measuring function
04/16/2014CN103728523A Urban power grid yield measuring method
04/16/2014CN103728506A Method for judging saturated harmonic instability of HVDC system converter transformer iron core
04/16/2014CN103728498A Electrical conductivity/frequency switching circuit
04/16/2014CN103728494A System and method for measuring and tracking resonance frequency
04/16/2014CN102375645B Method for detecting frequency and frequency change
04/16/2014CN102193046B Diagnostic device for electric machine, diagnostic method and carrier of diagnostic device
04/15/2014US8700360 System and method for monitoring and detecting faults in a closed-loop system
04/15/2014US8698482 UWB measuring device capable of reducing disturbance in external signals
04/10/2014WO2014053610A1 Frequency estimation
04/10/2014WO2014016357A3 Analysing rf signals from a plasma system
04/10/2014US20140097825 Duty Cycle Detecting Circuit for Pulse Width Modulation
04/10/2014DE102012109494A1 Method for determining frequency component of signal received by signal receiving unit in motor vehicle, involves digitizing third signal by first analog-to-digital converter and digitizing second signal in parallel by second converter
04/09/2014EP2717469A2 Method and apparatus for detecting cut-off frequency of pulse signal
04/09/2014CN203535210U Frequency characteristic testing device for all-fiber electronic current transformer
04/09/2014CN203535115U Power grid disturbing signal spectrum analyzer
04/09/2014CN203535099U Output frequency spectrum measuring device for power frequency electric device
04/09/2014CN103718060A Radar pulse detection using a digital radar receiver
04/09/2014CN103713192A Spectrum analyzer
04/09/2014CN103713191A Voltage converting device and sub-harmonic detector
04/09/2014CN103713183A CVT embedded power-grid voltage harmonic-wave monitoring system
04/08/2014US8694269 Reducing the ringing of actuator elements in ultrasound based health monitoring systems
04/03/2014US20140095161 System and method for channel equalization using characteristics of an unknown signal
04/03/2014US20140091783 System and method for monitoring ac ripple
04/02/2014CN203519731U Pulse-width automatic measurement circuit
04/02/2014CN203519725U Frequency stability measuring apparatus
04/02/2014CN103698603A Chip, chip clock testing method and chip clock testing system
04/02/2014CN103698602A Large dynamic high-precision synchronization continuous frequency measurement method
04/02/2014CN103698601A Sensor for measuring output voltage frequency of generator
04/02/2014CN103698600A Frequency measuring system for universal voltage input power frequency signal
04/02/2014CN103698599A Method and system for automatically measuring inflection point temperature of oven controlled crystal oscillator
04/02/2014CN102331529B Stability testing method and system of switch power supply feedback loop
04/01/2014US8686802 Bias voltage tuning of MEMS resonator operation point
04/01/2014US8686711 High-frequency measuring device and high-frequency measuring device calibration method
03/2014
03/26/2014CN203502494U Power grid harmonic online detection device
03/26/2014CN203502493U Power harmonic real-time detection system based on phase-locked loop
03/26/2014CN203502492U Frequency measuring device for water turbine generator set
03/26/2014CN203502476U Power monitoring device
03/26/2014CN103675776A In-pulse frequency spectrum parameter testing device and method for emission channel of digital array module
03/26/2014CN103675512A Sensing element and signal sensing device
03/26/2014CN103675448A Vector measurement method for passive intermodulation interference
03/26/2014CN103675447A High-precision real-time harmonic wave analysis method of electrified railway
03/26/2014CN103675446A Real-time accurate harmonic source positioning system and method
03/26/2014CN103675445A Capacitive voltage mutual inductor with high-voltage harmonic measurement function and measurement method
03/26/2014CN103675444A High-precision time-frequency analysis method
03/26/2014CN103675443A FPGA global clock detection technique for manned spacecraft
03/26/2014CN103674550A Real-time mixing denoising method for rolling bearing static monitoring signal
03/26/2014CN102508082B High-precision multimode low-voltage load power property recording instrument and working method thereof
03/19/2014EP2707733A1 Signal analysis in time and frequency
03/19/2014CN203490280U Electric signal measuring circuit
03/19/2014CN103645379A TTL signal frequency hopping monitoring system and method
03/19/2014CN102650658B Time-varying non-stable-signal time-frequency analyzing method
03/19/2014CN102508029B Phase angle tracking method for power grid
03/19/2014CN102269777B Synchronous signal detection apparatus and detection method thereof having frequency response adaptability
03/18/2014US8676526 High speed frequency and phase estimation for flow meters
03/18/2014US8674680 Method and device for fast measurement of frequency response with scalable short chirp signals
03/13/2014US20140070819 Technique for Determining Performance Characteristics Of Electronic Devices And Systems
03/13/2014DE102012215994A1 Verfahren und Schaltungsanordnung zum Bestimmen eines Arbeitsbereichs eines Ultraschall-Schwinggebildes Method and circuit for determining a workspace of an ultrasonic vibrating structure
03/12/2014CN203479903U Universal spectrum analyzer tracking source system
03/12/2014CN203479902U Sigma-delta pll frequency measuring circuit
03/12/2014CN103634024A Device and method for realizing frequency spread function of signal analyzer
03/12/2014CN103631582A Graph drawing method and system based on WPF technology
03/12/2014CN103630743A Method for correcting frequency of heterodyne type frequency spectrum analyzer
03/12/2014CN103630742A Dynamic signal parameter acquisition method
03/12/2014CN103630741A Circuit for measuring the resonant frequency of nanoresonators
03/12/2014CN102636694B Single-response microwave photonic filter-based frequency measurement device and measurement method
03/12/2014CN102590617B Method for realizing output of double sources of frequency spectrograph by using integrated broadband local oscillator and switch filter array
03/12/2014CN102590613B Method and device for measuring arrival time difference of radio-frequency signal
03/12/2014CN102412914B PXI bus-based radio frequency real-time measurement vector analysis plug-in structural module
03/06/2014US20140063257 Intrusion detection
03/06/2014US20140062455 Measurement apparatus and measurement method
03/05/2014EP2702421A1 System and method for detecting a fundamental frequency of an electric power system
03/05/2014CN103618287A Lightning protection method and system
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