This page is updated frequently with new Fault Detection-related patent applications.
|Fault detection system and circuits|
A device, system, and method is disclosed for improving safety of a power system. For example, a differential current may be detected using at least one sensor by temporarily enabling sampling of current flowing through one or more conductors.
Solaredge Technologies Ltd.
|Devices, methods, and systems for a distributed rule based automated fault detection|
Devices, methods, and systems for distributed rule based automated fault detection are described herein. One system includes a data extractor engine configured to: extract configuration data relating to an environment based on a number of defined rules, and receive monitored data relating to the environment, an afd engine configured to evaluate the monitored data in view of the configuration data to determine a state of the environment, and a fault generation engine to determine whether the state of the environment is outside a range defined by the number of defined rules..
Honeywell International Inc.
|Distributed industrial performance monitoring and analytics|
A technique is provided for providing early fault detection using process control data generated by control devices in a process plant. The technique determines a leading indicator of a condition within the process plant, such as a fault, abnormality, or decrease in performance.
Fisher-rosemount Systems, Inc.
|Valve fault detection|
Methods and systems are described for detecting valve actuation faults in internal combustion engines operating in a skip fire operational mode. In one aspect, for each skip fire working cycle, an expected exhaust pressure is determined for a time period corresponding to a potential exhaust event.
Tula Technology, Inc.
|Ground fault detection circuit|
A ground fault detection circuit comprising a fuse and a fuse detect circuit. The fuse and the fuse detect circuit are arranged to be coupled in parallel between a reference point and a second point of a monitored circuit for which ground faults are to be detected.
Control Techniques Limited
|Circuit protection device|
A circuit protection device comprises a housing consisting of a base and an upper cover. The device also comprises a clapboard, a circuit board, an ac power source path, a synchrotrans unit, a synchronous control switch, a tripping and resetting mechanism, a ground fault detection drive unit and a test and reset switch, to perform a function of ground fault protection, and to switch synchronously on or off the ac power path.
Jiaxing Shouxin Electrical Technology Co., Ltd.
|Time-domain directional line protection of electric power delivery systems|
The present disclosure relates to detection of faults in an electric power system. In one embodiment, an incremental quantities subsystem is configured to determine a forward torque, an operating torque, and a reverse torque based on the plurality of time-domain representations of electrical conditions.
Schweitzer Engineering Laboratories, Inc.
|Electrical system with arc fault detection|
A unique electrical system includes a first electrical component and a second electrical component. A conductor electrically couples the first electrical component with the second electrical component.
Abb Technology Ltd.
|Service chain fault detection method and apparatus|
This application discloses a service chain fault detection method and an apparatus. The method includes: obtaining, by a service forwarding entity sfe, a first fault tracing detection request packet, and then determining to communicate with a first service function sf node, where the first fault tracing detection request packet includes a path identifier id and an address of a device for initiating fault detection, and the path id is used to identify a path of a service chain; obtaining, by the sfe, an id of the first sf node; and sending, by the sfe, a first fault tracing detection response packet to the device for initiating fault detection, where the first fault tracing detection response packet includes the path id, the id of the first sf node, and the address of the device for initiating fault detection..
Huawei Technologies Co., Ltd.
|Detection of generator stator inter-circuit faults|
Aspects of the invention provide a system and method for detecting inter-circuit faults within a generator stator. In one embodiment, a computer system includes: a sampler for sampling phase voltages and phase currents of a generator stator; a plurality of pre-defined blocks for enabling, based on the sampled phase voltages and currents, an inter-circuit fault detection scheme; a level detection block for determining, in response to the enabled inter-circuit fault detection scheme, a plurality of differences between the sampled phase voltages; and a comparison logic device for comparing, in response to the enabled inter-circuit fault detection scheme, each of the differences of the sampled phase voltages and determining, based on the differences, an inter-circuit fault within at least one phase of the generator stator.
General Electric Company
Fault detection and diagnosis for refrigerator from compressor sensor
A refrigerator, a sealed refrigerant system, and method are provided where the refrigerator includes at least a refrigerated compartment and a sealed refrigerant system including an evaporator, a compressor, a condenser, a controller, an evaporator fan, and a condenser fan. The method includes monitoring a frequency of the compressor, and identifying a fault condition in the at least one component of the refrigerant sealed system in response to the compressor frequency.
Apparatus with device with fault detection protection
A device such as a laser diode is provided with a monitoring arrangement. The monitoring arrangement has voltage to current converters arranged to provide respectively currents which are proportional to the respective voltages on an anode and on a cathode of the laser diode.
Stmicroelectronics (research & Development) Limited
System and automatic high resistance ground pulse activation and detection
A system for locating a ground fault in an hrg power distribution system includes an hrg pulsing system having a ground fault sensor to detect a ground fault, a pulsing contactor to introduce a pulsing current into the power distribution system, and a controller to control the pulsing contactor to introduce the pulsing current into the power distribution system in response to a ground fault detection by the ground fault sensor. Current sensors in the power distribution system monitor three-phase current signals on conductors of the power distribution system, with the current sensors positioned on distribution networks in the power distribution system and at a protection device included on each respective distribution network.
Compressor protection and grid fault detection device
A method of operating a refrigeration system that receives power from an electrical grid includes selectively operating at least one component of the refrigeration system in a first state. The method includes selectively detecting a fault event of the electrical grid in response to a concurrent (i) increase in amount of current drawn by the component and (ii) decrease in voltage of power received by the component.
Emerson Climate Technologies, Inc.
System and fault detection
A fault monitoring system for an aircraft includes a processor having a fault diagnosis algorithm, a memory connected to the processor, a plurality of sensors located at selected nodes in an electrical network of the aircraft and connected to the processor, and a data collection algorithm in one of the processor or the plurality of sensors. Each sensor is configured to continuously monitor voltage and current of the electrical network at its selected node and to transmit data representative of the monitored voltage and current to the processor.
Ge Aviation Systems, Llc
Motor fault detection system and method
A system and method are described that can remotely track and monitor real-time parameters of electric motors and/or machines. Data such as vibration, temperature, current, location and more can be tracked regarding electric motors and/or machines in factories or other plant locations.
Ground fault protection circuit and ground fault circuit interrupter
The present invention relates to a ground fault protection circuit and a ground fault circuit interrupter. A ground fault protection circuit may include a power supply circuit, a ground fault detection circuit, a signal amplifying and shaping circuit, a microcontroller control circuit, a power supply detection and indicator circuit, a tripping mechanism control circuit, and a reverse grounding detection and execution circuit.
Angular speed detection device
The purpose of the present invention is to provide an inertial force detection device that can more accurately detect faults in a temperature sensor. Provided is an inertial force detection device configured so that in a state where an oscillating body is made to oscillate in a first direction, the amount of displacement when the oscillating body is displaced in a second direction due to the generation of angular velocity is detected as angular velocity, wherein the inertial force detection device has a means for performing control so that the oscillating body enters a state of resonance in the first direction, a temperature detection means for detecting temperature, and a means for detecting faults in the temperature detection means, and outputs a plurality of signals, which indicate the fault detection results of the three means, continuously from a single signal wire..
Hitachi Automotive Systems, Ltd.
Mobile wireless communications system and method with corrective action responsive to communications fault detection
A mobile device, wireless network and their method of operation provide fault handling in response to detection of a communications fault between a connected mobile device and the communications network. The communications network tracks location of mobile devices and stores performance data of connections between the mobile devices and the network.
Traxcell Technologies, Llc
Electrical switching apparatus including alternating current electronic trip circuit with arc fault detection circuit
An electrical switching apparatus includes a transductor circuit that senses a direct current between at least one input terminal and at least one output terminal and outputs an alternating current proportional to the direct current between the input terminal and the output terminal. The electrical switching apparatus also includes a current sensor configured to sense an alternating current component of the direct current.
According to one example, there is provided apparatus for detecting a fault in a printing system. The apparatus comprises a monitoring module to determine the length of a portion of an imaging member as the imaging member rotates; and indicate a fault condition when the determined length is different to a reference length..
Hewlett-packard Indigo B.v.
Actuator fault detection device, controlling device and control method
An actuator fault detection device that detects a fault of an actuator driven according to a manipulation variable mv output from a controlling device, including: a position acquiring portion that acquires a value of a motor position mp from a detector that detects a position of an actuator corresponding to a manipulation variable mv; a follow-up difference calculating portion that calculates a follow-up difference dm=mv−mp; and an allowable range determining portion that determines whether or not high speed operation or low speed operation of the actuator departs from an allowable range based on a manipulation variable change rate Δmv, an actuator position change rate Δmp, and the follow-up difference dm.. .
Fault detection and classification matching
Raw data from chambers is received. Based on received raw data, if a fault exists in operations of the chambers is detected.
Taiwan Semiconductor Manufacturing Co., Ltd.
Oam packet processing method, network device, and network system
An operations, administration, and maintenance (oam) packet processing method, a network device, and a network system are provided. The method includes receiving a first internet protocol (ip) packet, where the first ip packet includes an oam packet, an ip packet header of the oam packet includes a first source device identifier (id) and a first sink device id, and returning a second ip packet to reply to the oam packet, where the second ip packet includes an oam reply packet, an ip packet header of the oam reply packet includes a second source device id, a second sink device id, and a second packet type, the second source device id is an id of a local network device, and the second sink device id is the same as the first source device id.
Huawei Technologies Co., Ltd.
The present disclosure discloses a fault detection method and device. The method includes: receiving, by a terminal device, a fault detection instruction entered by a user, and determining a service type of a to-be-detected fault according to the fault detection instruction; determining fault detection content according to the service type; starting to detect the fault detection content to obtain a detection result; and presenting the detection result.
Huawei Device Co., Ltd.
Protective device with self-test
A protective electrical wiring device includes a protective assembly including a sensor portion, a fault detection portion and a switch portion. A control circuit is configured to automatically perform a test cycle from time to time, each test cycle including a series of tests that determine the operational state of the protective assembly.
Pass & Seymour, Inc.
Fault tolerant systems and using the same
Systems and methods for resolving fault detection in a control system is provided. The system includes an i/o module operably connected to a first, second, and third microcontroller for transmitting data.
Siemens Energy, Inc.
System and dynamic ground fault detection
A ground fault detector includes a relay configured to receive a first current. The ground fault detector also includes a voltage regulator configured to provide a voltage potential to ground.
Honeywell International Inc.
A driving device 5 includes: a fault detection device 11 that determines a fault in an actuator 6; a serial interface 7 that communicates with an mcu 2; a memory device 10 that stores a program received from the mcu 2 and a fault determination result by the fault detection device 11; a cpu 9 that causes the fault detection device 11 to execute the fault determination according to a fault determination request from the mcu 2; a timer device 16 that measures a limit time over which fault determination is performed and a determination period of fault determination; and a counter device 17 that counts the number of repeats of fault determination and the number of fault occurrences in the actuator 6.. .
Mitsubishi Electric Corporation
Semiconductor device and electric power control apparatus
A driver ic includes a ring-shaped termination area, and a first area and a second area that are respectively arranged outside and inside the termination area on a layout. A sense mos that is arranged between a floating terminal and a first sense node and is driven at a power supply voltage is formed in the termination area.
Renesas Electronics Corporation
Apparatus and ground-fault circuit interrupter for use in ground-return circuit
An apparatus and method for sensing a leakage current along a primary conductor are provided. A first fault detection module is deployed at a first location along the primary conductor and a second driver module is deployed at a second location along the conductor, where the conductor passes through current sensors at each of the modules.
Fault detection in electric power delivery systems using underreach, directional, and traveling wave elements
The present disclosure pertains to systems and methods for detecting faults in an electric power delivery system. In one embodiment, a system may include a data acquisition subsystem configured to receive a plurality of representations of electrical conditions.
Schweitzer Engineering Laboratories, Inc.
Fault detection system
A fault detection system is provided which includes power lines connecting between a dc power supply and electric equipment, switches respectively provided to the power lines, a capacitor connected to the power lines at a position where a distance to the electric equipment is shorter than a distance between the switches and the electric equipment, a charging unit charging the capacitor before the switches are turned on, a detection section connected to the power line at a connecting point where a distance to the dc power supply is shorter than a distance between the switches and the dc power supply, and detecting a change in an electric potential of the connecting point, and a determination section determining whether a short-circuit fault has occurred in any one of the switches based on a difference in the electric potential of the connecting point between before and after the capacitor is charged.. .
System and health monitoring of electrical systems
A method of electrical system fault detection and location determination includes measuring a baseline time domain reflectometry (tdr) waveform along a wire path of the electrical system and obtaining an operating tdr waveform along the wire path. The operating tdr waveform is compared to the baseline tdr waveform to derive a difference tdr waveform, and a difference energy is calculated utilizing the difference tdr waveform.
Sikorsky Aircraft Corporation
Motor winding fault detection circuits and methods to detect motor winding faults
Motor winding fault detection circuits and methods to detect motor winding faults are disclosed. An example fault detection circuit includes a positive sequence voltage calculator to calculate a positive sequence voltage value for a three-phase motor; a positive sequence current calculator to calculate a positive sequence current value for the three-phase motor; an interpolator to calculate an expected negative sequence voltage value based on the positive sequence voltage value, the positive sequence current value, and measured characteristics of the three-phase motor; a negative sequence voltage calculator to calculate a measured negative sequence voltage value for the three-phase motor; and a fault detector to detect that a winding fault exists in the three-phase motor when a difference between the expected negative sequence voltage value and the measured negative sequence voltage value satisfies a threshold..
Texas Instruments Incorporated
System and advanced digital economization
A system and method for advanced digital economization for an hvac system having an economizer. A digital processing unit is configured to open a damper of an economizer within a dead-band range that allows for preemptive cooling prior to a call for cooling.
Transformative Wave Technologies Llc
Fault detection and tolerance in downhole tool string assemblies
Systems, methods, and devices for fault detection and tolerance in a downhole tool string are provided. If a fault is detected in an electrical path between tools of downhole tool string, one or more switches of a fault detection and tolerance circuit may be kept open to isolate the fault in an electrical path between tools of downhole tool string.
Schlumberger Technology Corporation
Ground fault detection device
When a ground fault detection device detects a ground fault of a photovoltaic string, for example, while a power conditioner is in operation, a great current may be flowing in a switching section from the photovoltaic string, so that components resistant to a great current have been used for the switching section. A ground fault detection device includes a stop determination unit configured to determine whether a power converter for converting electric power from a solar battery is in stoppage, and a ground fault detector configured to detect a ground fault of the solar battery in a state where the solar battery and the power converter are electrically disconnected from each other by a disconnection unit arranged between the solar battery and the power converter when the stop determination unit determines that the power converter is in stoppage..
Electrical switching apparatus including alternating current electronic trip circuit with arc fault detection circuit and power supply
An electrical switching apparatus includes a transductor circuit that senses a direct current between an input terminal and an output terminal and outputs an alternating current proportional to the direct current. The electrical switching apparatus also includes a current sensor configured to sense an alternating current component of the direct current.
Control ac rotary machine
A control apparatus for an ac rotary machine includes voltage application units 3, 4 for applying voltages respectively to two sets of three-phase windings of ac rotary machine 1, control unit 5 that controls the voltage application units 3, 4, and fault detection units 6, 7 that output fault detection signals to control unit 5 varying in accordance with the ground short fault and the power short fault. When detecting, control unit 5 outputs a voltage command to faulty voltage application unit 3, 4 to set voltages of respective phases of the three-phase windings at a negative electrode side potential v− of dc power supply 2, and when detecting a power short fault, control unit 5 outputs a voltage command to set the voltages of the respective phases of the three-phase windings at a positive electrode side potential v+ of dc power supply 2..
Mitsubishi Electric Corporation
Self-learning fault detection for hvac systems
Systems and methods for self-learning fault detection and diagnosis in an hvac system include a server identifying a fault and one or more predicted causes of the fault based on measurements of operational parameters received from sensors associated with the hvac system. The operational parameters are compared to evaluation criteria, such as predetermined thresholds, to identify a potential fault.
Trane International Inc.
Apparatus and spark fault detection and typing
A spark fault tester apparatus includes an electrode; a power supply operatively connected to provide an electrical field at the electrode; a voltage monitoring module operatively connected to measure the intensity of the electrical field at the electrode; a current monitoring module operatively connected to measure a current output of the power supply; and a microprocessor operatively connected to sample the voltage monitoring module and the current monitoring module, and to adjust the power supply. The microprocessor implements a voltage regulation algorithm and a fault typing algorithm, based on samples of the voltage and current monitoring modules, to distinguish among at least two types of insulation defects..
Clinton Instrument Company
Building management system with voting-based fault detection and diagnostics
A building management system includes sensors configured to measure a plurality of monitored variables and fault detection and diagnosis (fdd) system configured to identify an operating state associated with the monitored variables. The fdd system includes a communications interface configured to receive samples of the monitored variables from the plurality of sensors.
Johnson Controls Technology Company
Post-installation learning fault detection
A fault detection module and related methods of prognostic fault detection for an hvac system are disclosed. Baseline operating parameters of an hvac system operating in a known balanced state are collected during a calibration period.
Trane International Inc.
Fault detection and diagnostics system utilizing service personnel feedback for improved accuracy
Systems and methods for fault detection and diagnosis (fdd) in a heating, ventilation and air conditioning (hvac) system include a server identifying a fault and one or more predicted causes of the fault based on measurements of operational parameters from the hvac system. The server also receives and utilizes information associated with the reported fault from service technicians who service the hvac to correct the reported fault condition.
Trane International Inc.
Catheter breach loop feedback fault detection with active and inactive driver system
A fault-detection method, system, and device for a cryosurgical system that avoids a false-positive detection of a fault condition, such as fluid ingress within the system. The fault-detection mechanism may generally include a driver having an active mode and an inactive mode, the driver generating an output signal when the driver is in active mode, a detector, the detector capable of receiving the driver output signal, and a detector verification controller in communication with the driver and the detector, the detector verification controller changing the driver from the active mode to the inactive mode when the detector receives the driver output signal.
Motor controller with flexible protection modes
A motor controller for use in a motor system includes a mode select circuit, a fault detection circuit, a protection logic circuit, and a motor control circuit. The mode select circuit sets the motor controller in one of an internal protection mode and an external protection mode.
Semiconductor Components Industries, Llc
Protection circuit and ground fault circuit interrupter
The present invention relates to a protection circuit and a ground fault circuit interrupter. A protection circuit may include a power supply circuit, a ground fault detection circuit, a signal amplifying and shaping circuit, a microcontroller control circuit, a power supply detection and indicator circuit, a tripping mechanism control circuit, and a reverse grounding detection and execution circuit.