Patents
Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850)
02/1996
02/27/1996US5494496 Battery voltage tester for end of cell
02/22/1996WO1996005565A1 Method of detecting signals by means of fuzzy-logic classification
02/22/1996DE4429191A1 Algorithm for modelling status changes e.g. in electrical power transmission networks
02/21/1996CN1117152A Decision circuit operable at a wide range of voltages
02/20/1996US5493211 Current probe
02/15/1996DE4428673A1 Magnetic proximity detector
02/15/1996DE4428658A1 Verfahren zur Erkennung von Signalen mittels Fuzzy-Klassifikation Method for detecting signals by means of fuzzy classification
02/15/1996DE19528501A1 Current sensor with signal compensation for polarity inversion
02/14/1996EP0696741A2 Bipolar cascadable circuit for signal limiting and field strength detection
02/14/1996EP0696738A1 Apparatus for digitizing AC signals of unknown or changing frequency
02/13/1996US5491434 Circuit and method of differential amplitude detection
02/10/1996CA2155616A1 Apparatus for digitizing ac signals of unknown or changing frequency
02/08/1996WO1996003826A1 Data signal zero crossing detection process
02/08/1996DE4431397C1 Output current and voltage detection system for pulsed current regulator
02/08/1996DE19524931A1 Device for measuring, storing and evaluating control signals of control and signalling appts.
02/08/1996DE19504271C1 Impedance measuring system for AS network
02/07/1996EP0695944A1 Single-pole voltage tester, especially for electrical overhead line
02/07/1996CN2219498Y Portable high-voltage AC electroscope
02/07/1996CN1116464A Method and apparatus for detecting an input signal level
02/07/1996CN1116309A Current measurement circuit comprising a mutally couples transformer and an integration circuit
02/07/1996CN1116308A Power transmission line hot-line measuring method and device
02/06/1996US5489874 Inverting amplifier having negative-resistance circuit
02/06/1996US5489872 Transconductance-capacitor filter circuit with current sensor circuit
02/06/1996CA2155463A1 Single-pole voltage detector, namely for overhead electric line
02/01/1996DE4426712A1 Verfahren zum Erfassen der Nulldurchgänge eines Datensignals A method of detecting the zero crossings of a data signal
02/01/1996DE4423763C1 Verfahren zum digitalen Bestimmen des Effektivwertes eines periodischen elektrischen Meßsignals A method for determining the digital rms value of a periodic electrical measurement signal
01/1996
01/30/1996US5488324 Detection circuit for detecting a state of a control system with improved accuracy
01/30/1996US5488304 Method and apparatus for judging active/dead status of communication cable
01/24/1996EP0693691A2 Battery charge indicators
01/24/1996CN1115489A Current signal correction process and device
01/24/1996CN1030800C Method and electrical measuring apparatus for analyzing impedance of source of actual alternating voltage
01/23/1996US5486756 DC current sensor
01/17/1996EP0692876A2 Power-out reset system
01/17/1996CN2217806Y Hand-touch type test pencil
01/16/1996US5485078 Method for analyzing a circuit board waveform for faults
01/11/1996WO1996000906A1 Digital process for determining the effective value of a periodic electric measurement signal
01/10/1996EP0691545A1 Process and appliance in digital systems for measuring alternating voltage, current and phase angle of a signal
01/10/1996EP0691543A1 Device for testing and/or measuring electric variables
01/10/1996CN1114749A Electric current sensor
01/09/1996US5483232 Method and apparatus for predicting peak voltage of a cable conveyed tool
01/09/1996US5483153 Transient event detector for use in nonintrusive load monitoring systems
01/03/1996CN2216681Y Voltage indicator for battery of vehicle
01/02/1996US5481468 Method and apparatus for storing an increasing number of sequential real-time samples in a fixed amount of memory
01/02/1996US5481211 Automatic polarity switching output circuit
01/02/1996US5481182 Up/down spectrum scaling of signals
12/1995
12/27/1995EP0689063A2 Electron detector with high back-scattered electron acceptance for particle beam apparatus
12/27/1995EP0689058A2 Circuit for monitoring a switching point regarding a leaking resistance
12/27/1995EP0689057A2 Monitoring device secured to power distribution system conductors
12/27/1995EP0688434A1 Power meter
12/27/1995EP0688433A1 Improved power meter
12/26/1995US5479120 High speed sampler and demultiplexer
12/26/1995US5479119 High speed active overvoltage detection and protection for overvoltage sensitive circuits
12/26/1995US5479103 For measuring the value of an unknown voltage
12/19/1995US5477171 Full wave rectifier using current mirror bridge
12/19/1995US5477135 Current probe
12/13/1995EP0686850A1 DC current measuring circuit with voltage isolation between current path and measuring circuit
12/13/1995CN2215119Y Signal-driven digital current meter
12/12/1995US5475371 For detecting the presence of faults on an electrical conductor
12/12/1995US5475301 DC current sensor using a continuous annularly shaped detection core
12/07/1995DE4419200A1 Testprobe for monitoring condition of 3 pole lighting circuit
12/07/1995DE19517373A1 Voltage generating circuit for testing large scale integrated circuit
12/06/1995EP0685743A1 Current measurement circuit comprising a mutually coupled transformer and an integration circuit
12/06/1995CN1030478C Low impedance, high voltage protection circuit
12/05/1995US5473529 Circuit arrangement for rectifying an AC voltage signal with a plurality of differential amplifier stages
12/05/1995US5473241 Method and apparatus for RMS measurements in induction motor without sampling
11/1995
11/30/1995DE4432963C1 Detection of current distribution in conductor of electric machine
11/29/1995EP0683856A1 Device and method for digitally measuring a voltage varying within a given range, and uses thereof.
11/29/1995CN1112676A Continuous detection apparatus for thermoelectric potential homogeneity of thermocouple wire material and its detection method
11/28/1995US5471396 Estimator of amplitude and frequency of a noisy-biased sinusoid from short bursts of samples
11/28/1995US5471169 Circuit for sinking current with near-ground voltage compliance
11/28/1995US5471162 High speed transient sampler
11/28/1995US5471161 Circuit for calculating the minimum value
11/28/1995US5471134 Measuring apparatus with adjustable indicator for measuring the real load factor on an electricity source
11/28/1995US5470417 Method of making multi-layer female component for refastenable fastening device
11/22/1995EP0683567A1 Precision analog-to-digital converter with low-resolution and high-resolution conversion paths
11/21/1995US5469365 Power monitor unit
11/21/1995US5469090 Transistor circuit for holding peak/bottom level of signal
11/21/1995US5469063 Method and apparatus for testing for a high voltage on the chassis of an electronic apparatus
11/21/1995US5468966 System for tomographic determination of the power distribution in electron beams
11/15/1995EP0682258A1 Obstruction detection circuit for sample probe
11/15/1995CN1111753A DC current sensor
11/14/1995US5467286 Metering unit with downloadable firmware
11/14/1995US5467141 Modulator circuit for use with a plurality of operating standards
11/14/1995US5467030 Circuit for calculating a maximum value
11/14/1995US5466940 Electron detector with high backscattered electron acceptance for particle beam apparatus
11/10/1995CA2138857A1 Obstruction detection circuit for sample probe
11/09/1995WO1995030277A1 Reverse current prevention circuits
11/08/1995CN2212209Y Circuit fault detector of motor vehicle
11/08/1995CN2212207Y Improved two-channel voltage monitor
11/07/1995US5465044 Analog multiplying-averaging circuit and wattmeter circuit using the circuit
11/07/1995US5465043 Non-contact type probe and non-contact type voltage measuring apparatus, wherein the probe's irradiation surface is coated with a conductive film having a pinhole
11/02/1995WO1995029553A1 Self-powered powerline sensor
11/02/1995WO1995029525A1 A window discriminator controlled current breaker
11/02/1995WO1995029407A1 Device for displaying the voltage of a conductor of a high-voltage power supply system
11/02/1995WO1995029405A1 Device for connecting a voltage display apparatus to a sensor
11/02/1995EP0679128A1 Junction box having integrally formed shunt
11/02/1995DE19514806A1 Stromdetektor Current detector
10/1995
10/31/1995US5463379 Electrostatic discharge detector
10/31/1995US5463350 Biasing circuit of an amplifier
10/31/1995US5463345 Circuit for converting unipolar input to bipolar output