29 results about "Failure detector" patented technology

The invention relates to an electronic circuit, an electronic system and a method. The electronic circuit includes a fault output node switchable between a fault state indicative of a fault operating state and a normal state indicative of a normal operating state, the electronic circuit further including a fault detector configured to place a number of fault event signals of a plurality of fault event signals in an active state, each of the plurality of fault event signals indicates a different fault event associated with the electronic circuit; a failure mode signal generator configured to generate a failure mode signal based on the plurality of failure event signals placed in the active state; and a fault output node control unit configured to receive the fault mode signal, and in response to receiving the fault mode signal: switch the fault output node to a fault state, and output the fault mode signal at the fault output node by switching the fault output node according to the fault mode signal.

A failure detection device according to one embodiment of the present invention includes a first resistive voltage divider circuit, a second resistive voltage divider circuit, a comparator, and a determination unit. The first resistive voltage division circuit is configured to be capable of dividing a high voltage applied to a first pixel control line among the plurality of pixel control lines. The second resistive voltage division circuit is configured to be capable of dividing a low voltage applied to the first pixel control line. The comparator is capable of comparing a reference voltage with a first voltage generated by the first resistive voltage division circuit or a second voltage generated by the second resistive voltage division circuit. The determination section is capable of performing failure determination of the drive circuit and each of the pixel control lines based on a result of the comparator.

The application relates to the technical field of unmanned aerial vehicle fault detection, and discloses an unmanned aerial vehicle real-time fault detection method based on a deep domain adaptive BiLSTM, which comprises the following steps: a feature extractor and a fault detector are pre-trained in a source domain, then past and future features are extracted from the flight data of the unmanned aerial vehicle time sequence under one working condition by using the feature extractor, and a feature set of the source domain and the target domain is obtained; the feature set is sent to a domain adapter for processing, the source domain and the target domain are classified by using the domain adapter, and the maximum difference between the source domain and the target domain is measured; the fault detector is optimized and trained in a minimum health state classification error mode, then the flight data of the unmanned aerial vehicle under any working condition is acquired, the fault detector is used for real-time fault detection of the unmanned aerial vehicle, and a health state report of the unmanned aerial vehicle is obtained. The application has the beneficial effects of reducing the difference between different working condition data and improving the accuracy of the unmanned aerial vehicle fault detection result.

1. Name of the product in this design: Four-channel DC arc fault detector. 2. Purpose of this design: For arc fault detection at the high-voltage DC end of a photovoltaic inverter. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

A fault detection system and method for detecting a fault condition in a direct current (DC) system. A power transmitter energizes a cable with electrical power. A power receiver connected to the cable provides the electrical power to a load. At the power receiver, a signal generator coupled to the cable generates and propagates a deterministic signal on the cable. At the power transmitter, a fault detector is coupled to the cable to receive the deterministic signal and noise after propagation through the cable. The fault detector has a plurality of filter branches with each of the filter branches having an associated bandwidth. Adjusting a gain of one or more of the filter branches in response to a signal-to-noise ratio of the cable. The cable is deenergized when a fault is detected on at least one of the filter branches.

An apparatus for detecting fault conditions in a power system is described. The apparatus may include one or more powered lines configured to output electricity to an electrical distribution system, a neutral line, an interrupter, and a controller. The controller may be configured for detecting when a fault condition is present in the power system. In response to detecting that the fault condition is present, the controller may cause the interrupter to interrupt the power supplied by the one or more powered lines. In response to detecting that the fault condition is no longer present, the controller may determine a power restoration delay time and cause the one or more powered lines to supply power to the electrical distribution system when the power restoration delay time has been elapsed.

An electronic circuit comprises a fault output node that is switchable between a fault state, indicating a fault operating state, and a normal state, indicating a normal operating state, wherein the electronic circuit further comprises: a fault detector configured to detect a number of fault event signals from a plurality of fault event signals, each of the plurality of fault event signals indicating a different fault event associated with the electronic circuit; a fault mode signal generator configured to generate a fault mode signal based on the detected number of fault event signals; and a fault output node control unit configured toto receive the error mode signal and, in response to receiving the error mode signal: to switch the error output node to the error state and to output the error mode signal at the error output node by switching the error output node according to the error mode signal.

Reduce the number of ground fault detectors or circuits. [Solution] A ground fault detector 50 for power equipment includes a resistance grounding circuit 51 that grounds the P-phase power line 60P and N-phase power line 60N connecting a DC power supply 20 and a power converter 30 to the neutral point via a resistor, and a detection unit 53 that detects a ground fault based on at least one of the P-phase voltage and N-phase voltages V1 and V2 of the DC power supply 20. The detection unit 53 determines that there is an abnormality or an AC ground fault if periodically fluctuating voltage components S1 and S2 are superimposed on at least one of the P-phase voltage or N-phase voltages V1 and V2 of the DC power supply 20.

According to an embodiment, a control device includes a controller and a fault detector. The controller controls an electric motor. The fault detector detects a fault of the electric motor. The fault detector performs a frequency analysis of a voltage signal and a current signal that drive the electric motor. The fault detector determines, based on a result of the frequency analysis, whether or not the current signal includes an odd-order harmonic having a frequency that is odd multiples of a fundamental wave of the voltage signal. The fault detector determines, based on the result of the frequency analysis, whether or not the odd-order harmonic has a first phase angle that is a phase angle of an opposite phase with respect to a phase angle of the fundamental wave.

Systems, devices, methods, and computer-readable media for improved hyperspectral images are provided. A method includes determining first pixel data of a first frequency band of frequency bands of a pixel of a hyperspectral image corresponds to a failed detector, determining a neighboring pixel of neighboring pixels of the pixel that has a corresponding first spectral profile (i) most similar to a second spectral profile of the pixel and (ii) corresponds to a non-failed detector, determining second pixel data from the first spectral profile, and replacing the first pixel data with second pixel data in the second spectral profile.

The application belongs to the technical field of fault detection and analysis in control system, and discloses a kind of hot reactor fault detection method based on polytope. Through the discretization analysis of the nonlinear model of hot reactor, the system dynamics under the condition of hot reactor failure is described by T-S fuzzy 2-D model. To solve the problem of unknown antecedent variables, a T-S fuzzy state observer is designed to calculate the estimated value of the antecedent variables using state estimation. On this basis, a T-S fuzzy fault detector is designed to generate a residual signal. Using the estimated-based method, a fault detection mechanism based on polytope is established to determine whether a fault has occurred according to the residual signal. Finally, the feasibility and effectiveness of the application are verified through simulation. The application first designs a T-S fuzzy 2-D model fault detector for hot reactor, and conducts fault detection based on polytope under the condition of unknown antecedent variables.

The present invention provides a glitch detector including a first inverter, second inverter, a charge sharing component and a warning flag generator. The first inverter is configured to receive a first signal at a first node to generate a second signal to a second node. The second inverter is configured to receive the second signal at the second node to generate the first signal to the first node. The charge sharing component is configured to selectively connect the first node to the second node. The warning flag generator is coupled to the first node or the second node, and configured to determine whether a supply voltage of the glitch detector suffers an under voltage glitch according to a voltage level of the first signal or a voltage level of the second signal, to determine whether to output a warning flag.

The disclosure relates to an electronic circuit, an electronic system, and a method. The electronic circuit includes a fault output node switchable between a fault state indicating a fault operating state and a normal state indicating a normal operating state, the electronic circuit further including: a fault detector configured to assert a number of fault event signals of a plurality of fault event signals, wherein each of the plurality of fault event signals indicates a different fault event associated with the electronic circuit, a fault mode signal generator configured to generate a fault mode signal based on the asserted number of fault event signals, and a fault output node control unit configured to receive the fault mode signal and, in response to receiving the fault mode signal, switch the fault output node to the fault state.

1. The name of the design product: portable acoustic emission mechanical seal failure detector shell (ESL). 2. The use of the design product: used for loading and protecting the acquisition board card, operation board card composition, wireless WiFi module (detachable) and hard disk storage module. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The application belongs to the technical field of aircraft component and assembly design and manufacturing, and discloses an aircraft cabin door control system, which comprises a microprocessor module, an interface circuit module, a driving module, a cabin door signal logic control module and a self-detection module, the microprocessor unit comprises an A / D conversion module and a data processing and logic judgment unit, the interface circuit module comprises a plurality of aircraft cabin door position sensors and a slide pre-position inductance sensor signal, the driving module comprises a door driving, a slide driving and a fire alarm driving, and the self-detection module comprises a fault detector. The application provides the collection, transmission, processing, position state indication and cabin door abnormal alarm of the aircraft cabin door position sensor signal by designing the aircraft cabin door signal control system and control assembly, simultaneously provides the BITE self-detection function of the aircraft cabin door control system, reduces the operation failure probability of the crew, and improves the safety during flight.

The training or optimization of a failure detector for detecting a presence or immanence of a failure or a degradation of a motorized system which comprises one or more closed-loop controlled electro motors may be achieved more efficiently by a more efficient generation of the dataset underlying this training, in that the more efficient generation of this dataset is achievable by providing a set of control parameters of a controller component arranged in one or more control loops of the one or more closed-loop controlled electro motors, with the settings representing different deviations from an in-use setting of the control parameters, and / or providing a set of set point signals of the one or more control loops of the one or more closed-loop controlled electro motors, the set of set point signals representing different variations of a base set point signal.

An electronic device is presented. The electronic device comprises a non-volatile memory configured for storing information independent of power supply. The electronic device further comprises a plurality of writeback registers configured for storing information parallel to operation of the electronic device. The electronic device further comprises a fault condition detector configured for detecting a fault condition of a primary power supply, activating a substitute power supply path to a substitute power supply in case of the fault condition, and initiating an information transfer from the writeback registers to the non-volatile memory in case of the fault condition. Further, a system comprising the electronic device and a method for operating the electronic device are presented.

To discriminate between failure of a current sensor and failure of a motor.SOLUTION: A failure detection method using a failure detector, the method comprising: calculating divided data by dividing one of a second harmonic amplitude of a fundamental wave frequency of a phase current detected by a current sensor that detects the phase current flowing between an inverter circuit and a motor and a fundamental wave amplitude of the phase current detected by the current sensor by the other; and determining a failure of the current sensor and a failure of the motor based on a change in the divided data due to a difference in the fundamental wave frequency.SELECTED DRAWING: Figure 10

Sensor device (10) comprising the following: at least one first sensor element (13) with a first detection direction configured to generate at least one first sensor signal (Sx, Sx1) based on the detection of a first magnetic field component of a varying magnetic field oriented in the first detection direction; at least one second sensor element (14) with a second detection direction, configured to generate at least one second sensor signal (Sy, Sx2) based on the detection of a second magnetic field component of the varying magnetic field, which is oriented in the second detection direction; a signal processing circuit (15, 16) configured to generate a first pulse signal (S1) based on the at least one first sensor signal (Sx, Sx1) and to generate a second pulse signal (S2) based on the at least one second sensor signal (Sy, Sx2); a fault detector (18) configured to detect at least one fault and to generate a fault signal indicating the at least one fault in response to the detection of the at least one fault; and an output generator (17) configured to receive the first pulse signal (S1) and the second pulse signal (S2), the error signal based on a first condition that the error detector (18) detects the at least one error, and simultaneously output a first output signal (OUT1) and a second output signal (OUT2), wherein, based on a second condition that the fault detector (18) does not detect the at least one fault, the output generator is configured to output the first pulse signal (S1) as the first output signal (OUT1) and to output the second pulse signal (S2) as the second output signal (OUT2), and wherein, in response to the first condition being satisfied, the output generator (18) is configured to keep the first output signal (OUT1) in a steady state and to output the second pulse signal (S2) as the second output signal (OUT2), wherein: the first pulse signal (S1) comprises several transition edges that define several first pulses, the second pulse signal (S2) comprises several transition edges that define multiple second pulses, and the first several transition flanks are synchronized with the second several transition flanks.

The invention discloses a multi-channel conductive slip ring transient interruption high-precision detector based on adjustable threshold comparison, which mainly relates to the technical field of conductive slip ring detection, and comprises a power supply unit, an adjustable reference resistor unit, a multi-path high-slew-rate constant-current excitation source, a data acquisition and processing unit taking an FPGA as a core, and a man-machine interaction unit, a continuously adjustable reference voltage is generated through a path of constant current excitation and a knob type precise adjustable resistor and is used as a transient-break resistance threshold reference; the other multi-path constant current excitation synchronously acts on each channel of the tested slip ring; the FPGA utilizes a high-frequency clock generated by a phase-locked loop to carry out real-time comparison and nanosecond precision timing on response voltage and reference voltage of each channel in parallel; according to the invention, continuous adjustment and visualization of the transient-current resistance threshold can be realized, and the detection precision is greatly improved.

The present embodiment relates to a memory failure analysis method that is performed by a memory test apparatus. The memory failure analysis method includes setting a test area of a memory under test (MUT), inputting a test pattern to the set test area, receiving a test result from the MUT, and an updating operation including operation (a) of storing failure information extracted from the test result and operation (b) of compressing, updating, and storing failure information, which is stored in a failure accumulator, using the stored failure information, wherein a first failure detector and a second failure detector alternately perform operation (a) and operation (b), and the test area is a non-linear area.

In-vehicle display device causes in-vehicle display terminal provided to vehicle to display one of an in-vehicle image that is an image related to in-vehicle devices provided to vehicle or a terminal image that is an image output from mobile terminal carried by a passenger of vehicle. In-vehicle display device includes: first image obtainer that obtains the terminal image from mobile terminal; second image obtainer that obtains the in-vehicle image from in-vehicle devices; failure detector that detects a render failure in a process of generating the terminal image; and display controller that switches an image to be displayed from the terminal image to the in-vehicle image and causes in-vehicle display terminal to display the in-vehicle image, when failure detector detects the render failure in the process of generating the terminal image.

The embodiment of the utility model provides a water tank and a water tank system, and the water tank comprises a tank body which is used for containing a heated medium; the heat tracing band is wound on the outer surface of the box body in the circumferential direction; the fault detector is arranged on the heat tracing band and is used for detecting the fault of the heat tracing band; the fixing band is attached to the outer surfaces of the heat tracing band and the box body and is used for fixing the heat tracing band on the box body; the outer surface of the fixing band is coated with the heat preservation layer; the temperature detector is arranged on the outer surface of the box body and used for detecting the temperature of the box body. According to the water tank and the water tank system, the heat tracing band is wound on the outer surface of the tank body, so that the heating uniformity can be improved; and the fault detector is adopted to detect whether the heating tape has faults or not, so that the faulted heating tape can be timely and accurately found, and the local heat loss of the water tank is reduced after the heating tape is timely replaced and processed.

A fault detection system and method for detecting a fault condition in a direct current (DC) system. A power transmitter energizes a cable with electrical power. A power receiver connected to the cable provides the electrical power to a load. At the power receiver, a signal generator coupled to the cable generates and propagates a deterministic signal on the cable. At the power transmitter, a fault detector is coupled to the cable to receive the deterministic signal and noise after propagation through the cable. The fault detector has a plurality of filter branches with each of the filter branches having an associated bandwidth. Adjusting a gain of one or more of the filter branches in response to a signal-to-noise ratio of the cable. The cable is deenergized when a fault is detected on at least one of the filter branches.

An apparatus (101) for detecting fault conditions in a power system is described. The apparatus may include one or more powered lines (520, 524) configured to output electricity to an electrical distribution system, a neutral line (522), an interrupter (526), and a controller (106). The controller may be configured for detecting when a fault condition is present in the power system. In response to detecting that the fault condition is present, the controller may cause the interrupter to interrupt the power supplied by the one or more powered lines. In response to detecting that the fault condition is no longer present, the controller may determine a power restoration delay time and cause the one or more powered lines to supply power to the electrical distribution system when the power restoration delay time has been elapsed.

The disclosure relates to voltage glitch detection in an integrated circuit for detection of fault injection attacks. Example embodiments include an integrated circuit comprising: a hardware accelerator including a computing module configured to perform a computing function; and a glitch detector including a delay function and a comparator arranged to compare an output from the delay function with an expected result to provide an output for detecting a glitch, wherein the delay function of the glitch detector is provided at least in part by the computing function of the computing module in the hardware accelerator.

The invention discloses a cross arm and insulator installation robot motor fault detection method based on a T-S fuzzy model, and the method comprises the following steps: 1, building a permanent magnet synchronous motor T-S fuzzy model according to electromagnetism and motor dynamics; 2, designing an observer, and obtaining a load torque estimation value; 3, designing an L (infinity) / Hfuzzy fault detector and an observation error system; 4, main problems of fault detector design are described, a fault detector gain matrix is designed, and an observation error system is made to meet a target; a fault detector design criterion is given for the target to solve the problem; and 5, designing a residual evaluation function Jr, a threshold Jth and fault judgment logic. According to the method, the advantages of the T-S fuzzy model in the aspect of approaching nonlinear dynamic are fully utilized, the nonlinear problem in fault detection is effectively solved, related frequency domain information is fully utilized, and the fault detection performance is improved.

The application provides a micro-fault distributed detection method for a direct current micro-grid. It belongs to the technical field of direct current micro-grids and solves the technical problem that the existing micro-fault detection method cannot detect the micro-fault of a direct current micro-grid with significant unknown disturbance and noise in practical application. The technical scheme is as follows: a. determining the observer gain matrix according to the optimal solution; b. collecting the residual error generated by the distributed observer under the condition of no fault; c. constructing a distributed fault detector based on the residual error correlation and using the local residual error and the associated residual error to generate a fault detection signal; d. generating a test statistic on line, giving a corresponding threshold, and setting a fault detection logic to realize the distributed detection of the micro-fault in the direct current micro-grid. The application improves the fault detection sensitivity by using the residual error correlation caused by the distributed interconnection, quickly and accurately detects the micro-fault, and thus improves the fault diagnosis reliability of the system.