| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 324525000 | By resistance or impedance measuring | 14 |
| 20080278174 | Circuit and Method for Detecting a Dielectric Breakdown Fault - An improved circuit and method for detecting dielectric breakdown and ground fault conditions is provided. The circuitry and method of the present invention include taking a continuous voltage reading of the high voltage battery and sampling the continuous voltage reading of the high voltage battery at a fixed time interval. The circuitry and method calculate a change in the continuous voltage reading of the high voltage battery over the change in time and repeatedly calculate an optimum fixed time interval and an optimum change in voltage over time. Storage of the optimum fixed time interval and optimum change in voltage over time provides for repeatedly comparing the optimum change in voltage over the fixed time interval to the constant voltage of the high voltage battery to calculate the resistance of the dielectric breakdown fault. The calculation of the resistance of the dielectric breakdown fault is carried out independently of the capacitance of the electric circuit. The circuit and method provide adjustment of the optimum fixed time interval to improve the speed of the comparison of the optimum change in voltage over time to the constant voltage of the high voltage battery to calculate the resistance of the dielectric breakdown fault. | 11-13-2008 |
| 20090039895 | METHOD OF DETECTING FAULTY VIA HOLES IN PRINTED CIRCUIT BOARDS - A method of detecting faulty via holes of a printed circuit board. The printed circuit board including a number of electric trace segments. The method includes steps of: providing a testing system, the testing system comprising a processor, a storing means and a resistance measuring device, the storing means for storing a function Y | 02-12-2009 |
| 20090212786 | Impedance-Based Arc Detector for Computed Tomography Scanner and Method of Use Thereof - The present disclosure relates to an impedance-based arc detector for CT scanners and method of use and diagnosis therewith, and more specifically, to a two- or three-way conductive probe detector system and associated signal processing unit to distinguish the location of arc faults on a CT scanner at either the high-voltage cable of an x-ray tube, an anode connected to the x-ray tube, a cathode also connected to the x-ray tube, a high-voltage well, or a power distribution unit of the tube. | 08-27-2009 |
| 20090284264 | LOCATING A LOW-RESISTANCE FAULT IN AN ELECTRICAL CABLE - An inductance-based cable length-to-fault measurement device and method are described. The cable under test having a per-unit-length inductance is coupled to an inductance-sensitive oscillator, and the frequency of oscillations is evaluated using the following serially coupled modules: a comparator for digitizing the oscillator output, a pre-scaler for oscillation frequency down-conversion, and a microprocessor for counting pulses from the pre-scaler. To remove environmental and manufacturing tolerance dependencies, as well as a battery voltage dependence, the measured frequency of oscillations is compared to a frequency of oscillations of the oscillator having coupled thereto a reference inductor. | 11-19-2009 |
| 20100013492 | STORAGE BATTERY INSPECTING SYSTEM - A storage battery inspecting system includes a power supply unit and an inspecting unit. The inspecting unit includes two inspecting terminals to be connected to a battery soldering spot so as to detect response of the soldering spot to application of a test power signal by the power supply unit, and a control module for determining if a detected response of the soldering spot falls within a predetermined range configured in the control module, generating an indication signal if the detected response falls outside the predetermined range, and generating an inspection result corresponding to the detected response. The inspecting unit further includes an indication interface for outputting the indication signal, a transmission interface permitting supply of the inspection result to a processing device, and a control interface permitting supply of a control signal generated by the control module to a peripheral device for controlling operation of the peripheral device based on the detected response. | 01-21-2010 |
| 20100066384 | IDENTIFYING DAMAGE TO A WIRE - Methods, systems, and articles of manufacture consistent with the present invention determine the type of damage to a wire, the amount of damage, and the location of the damage based on the wire's broadband impedance measured from a single measurement point. The type of damage is determined by comparing the wire's calculated dielectric function, resistance and inductance to known values that correspond to types of wire damage. The amount of damage is determined by comparing the wire's low-frequency impedance phase to known low-frequency impedance phase information that corresponds to a known amount of wire damage. The location of damage is determined by comparing the wire's high-frequency impedance phase to known high-frequency impedance phase information that corresponds to a known location of wire damage. | 03-18-2010 |
| 20100097070 | METHOD FOR PERFORMING A SHIELD INTEGRITY TEST AND FOR ISOLATING TROUBLE IN THE SHIELD USING GRAPHICAL ANALYSIS - A method for evaluating the integrity of a cable shield utilizing wideband noise-to-ground measurements is provided. Upon determining that trouble with the cable shield exists, a method s is provided to isolate the location of the trouble with the cable shield. The method utilizes access locations along the cable and therefore does not require opening of the cable shield to isolate the trouble in the shield. | 04-22-2010 |
| 20100225329 | LOAD COMPENSATION IN DISTANCE PROTECTION OF A THREE-PHASE POWER TRANSMISSION LINE - A load compensation method for phase-to-ground loops in distance protection. A first reactive reach is estimated assuming zero fault resistance or with a positive sequence current. A second reactive reach is estimated with a zero sequence current. A third reactive reach is estimated with a negative sequence current. An import or export condition is estimated. A fourth reactive reach for import or export condition is estimated based on the first, second and third reactive reach. A fault impedance is estimated based on the estimated fourth reactive reach. | 09-09-2010 |
| 20100259276 | ARCHITECTURE AND METHOD TO DETERMINE LEAKAGE IMPEDANCE AND LEAKAGE VOLTAGE NODE - A circuit, system and method for detecting the presence of a leakage path in a multi-cell voltage source is described. The system includes a detection circuit, the detection circuit having a first amplifier and a second amplifier, a first input of the first amplifier connected to a first terminal of the voltage source and the first input of the second amplifier connected to a second terminal of the voltage source, a second input of each of the first and second amplifiers connected to a reference voltage point, and an output of each of the first and second amplifiers connected to a respective first and second output of the detection circuit; and a processor having inputs connected to the first and second outputs of the detection circuit. | 10-14-2010 |
| 20110043214 | Method and apparatus for locating a parallel arc fault - Methods to determine the location of an arc fault include a first method utilizing the inherent resistance per unit length of the wire. A second and a third method utilize an inherent inductance per unit length of the wire. The second method derives the inherent inductance from the output voltage and a rate of current rise. The third method derives the inherent inductance from a resonant frequency of an oscillating current. The information is useful to locate a fault emanating from a wire member of a wiring harness used to distribute power about an aircraft. | 02-24-2011 |
| 20130057296 | Systems, Methods, and Apparatus for Locating Possible Fault Locations in an Electrical Power Network - Certain embodiments of the invention may include systems, methods, and apparatus for locating possible fault locations in an electrical power network. According to an example embodiment of the invention, a method is provided for locating possible fault locations in an electrical power network. The method can include receiving fault information including one or more of: an identifier associated with at least one tripping device or a fault impedance value associated with a faulted section of the electrical power network; determining a fault direction; and generating a list of possible fault locations based at least in part on the received fault information and the fault direction. | 03-07-2013 |
| 20130113497 | FAULT POSITION ANALYSIS METHOD AND FAULT POSITION ANALYSIS DEVICE FOR SEMICONDUCTOR DEVICE - A fault position analysis method and a fault position analysis device for a semiconductor device, through which a fault position of a SiC semiconductor device can be analyzed and specified by an OBI RCH method, are disclosed. The fault position analysis method for the semiconductor device scans and irradiates a device and a circuit on a front surface of a substrate with a laser beam from a rear surface side of the substrate of the semiconductor device to heat the device and the circuit. It causes a current to flow to the device and the circuit while being heated, detects a change in a resistance value caused by a change in a current, and analyzes the fault position. The semiconductor device is a semiconductor device which uses an N-doped SiC substrate. Laser beams having wavelengths of 650 to 810 nm are used. | 05-09-2013 |
| 20130249565 | POWER STORAGE APPARATUS, MOBILE DEVICE, AND ELECTRIC-POWERED VEHICLE - Provided is a power storage apparatus having an impedance measuring function and is capable of, when the apparatus has a large number of power storage elements connected in series, judging a deteriorated power storage element in a short period of time. The power storage apparatus having the impedance measuring function measures and compares impedances of power storage units in a high-voltage side half and a low-voltage side half using a first judgment circuit, measures impedances of high-voltage side and low-voltage side power storage elements by selectively using a second judgment circuit installed adjacent to a power storage unit judged to have a large impedance. With this, the power storage apparatus identifies a power storage element that has high impedance among the whole and its impedance, and detects and displays deterioration or malfunction through a threshold-value judgment. | 09-26-2013 |
| 324526000 | Using a bridge circuit | 1 |
| 20110169497 | SHUNT CALIBRATION FOR ELECTRONIC PRESSURE SWITCHES - Disclosed herein is an electronic switch that comprises a pressure sensitive bridge array adapted to monitor pressure and activate an indicator when the monitored pressure exceeds a predetermined value indicative of a dangerous condition. The electronic switch further comprises a monitoring circuit adapted to test the overall operability of the pressure sensitive bridge array and its accompanying electronics control circuitry. | 07-14-2011 |
