44results about How to "Reduce fault detection time" patented technology

The communication device has a frame transfer unit that executes frame transfer via the first communication link and the second communication link, a link confirmation frame sending unit, and a return link confirmation frame monitoring unit. The link confirmation frame sending unit causes the frame transfer processing unit to send a link confirmation frame for use in confirming a normal link status via the first communication link from the communication device to the counterpart communication device. The return link confirmation frame monitoring unit performs fault detection of the first and second communication links by monitoring a return link confirmation frame which is to be returned from the counterpart communication device to the communication device via the second communication link when the counterpart communication device receives the link confirmation frame via the first communication link.

Provided are a method, device and system for processing a fault in at least one distributed cluster. At least one distributed cluster comprises a first distributed cluster, and the first distributed cluster comprises a first Master node, a first Slave node, a first reference node, and a first backup node serving as a backup of the first Master node. The first backup node receives a heartbeat message which is sent by the first reference node and comprises first indication information used for indicating that the first reference node and the first Master node are in a disconnected state; according to the first indication information, the first backup node determines that the first reference node and the first Master node are in a disconnected state; when it is detected that the heartbeat message sent to the first backup node by the first Master node is interrupted, the first backup node determines that the first backup node and the first Master node are also in a disconnected state; and the first backup node determines that the first Master node is faulty. In the embodiments of the present invention, fault detection time can be effectively shortened.

The invention discloses a vehicle body controller fault test method and a system based on an industrial personal computer. The system comprises an industrial personal computer (100), a vehicle body controller (200) with an interface circuit board (400), a programmable power supply (300) and a data transmission device (103). The industrial personal computer (100) is used for simulating a group of input signals for a fault test on the vehicle body controller (200) when a vehicle body controller fault test instruction is received. The data transmission device (103) is used for inputting the group of input signals to the vehicle body controller (200) via the interface circuit board (400). The data transmission device (103) is also used for receiving a group of output signals outputted by the vehicle body controller (200) via the interface circuit board (400) and inputting the group of output signals to the industrial personal computer (100). The industrial personal computer (100) is also used for acquiring a fault test result for the vehicle body controller (200) through carrying out waveform feature analysis on the group of output signals.

The invention provides a matrix switch relay fault detection device and method. Through adding a circuit board, signal output channels of matrix switches are respectively connected in series with a resistor having identical resistance, parallel resistor resistance measurement on the multiple switch channels is carried out, and whether a switch relay is in fault is determined according to change of measurement values. The method is advantaged in that sequentially closing and opening all the matrix switch relays is not needed, a step-by-step average grouping method is utilized to carry out resistance measurement of the multiple switches having relay faults, a detection scope is reduced step by step, the fault detection time can be shortened, detection efficiency is improved, and the method has the obvious effect on large-scale matrix switches.

The invention relates to a detection method for a cable grounding fault. A method for detecting a grounding fault of a bridge cable, which includes: connecting one end of the faulty cable to the output end of a DC stabilized power supply, and the other end to be short-circuited to any other intact phase cable; connecting the output end of the DC stabilized power supply to the other The other end of any phase cable; turn on the DC stabilized power supply to keep the output current stable at 5-10A; use a DC voltmeter to measure the values ​​V1 and V2 of the voltage range of the two ends of the faulty cable to the bridge frame; The rough position of the fault point of the cable can be calculated; then the DC stabilized power supply is released, and one end of the resistance gear of the multimeter is connected to one end of the faulty cable, and the other end is grounded; the insulating rope is used to trap the faulty cable near the rough measurement position and move. When the resistance value of the multimeter points to the maximum value, that is, the position where the insulating rope moves is the fault point. The invention can be used for fast and accurate detection of the grounding fault point of the cable laying bridge.

An embodiment of the invention provides a method and a device for detecting faults of an electricity consumption information collecting system and relates to the field of communication. By the method and the device, the faults of the electricity consumption information collecting system can be detected automatically, and fault detection efficiency of the electricity consumption information collecting system is improved. The method is applied to the device and includes that the device acquires a copying-reading result, about first electricity meter, acquired by a concentrator in the electricity consumption information collecting system, wherein the copying-reading result is used for indicating whether copying-reading is successful or not; if the copying-reading result indicates that copying-reading is failed, the device detects a communication channel between the concentrator and the first electricity meter to acquire a detection result of about communication channel, wherein the detection result is used for indicating whether the communication channel has a fault or not; the device determines whether the communication channel or the first electricity meter has a fault according to the detection result.

The invention discloses an inverter online open circuit fault detection method. Firstly, the two-phase current of an inverter is collected; calculating is performed to obtain the amplitude and the phase of the three-phase current at the sampling moment; calculating is performed to obtain a per-unit value of the sum of absolute values of the three-phase current at the sampling moment; the per-unitvalue is compared with a preset threshold value; whether an open circuit fault occurs is judged, if yes, fault positioning is performed according to the three-phase current. The method comprises the following specific steps: carrying out per unit processing on the three-phase current, carrying out zero-crossing one-resetting processing on the per unit current, calculating a fault positioning identifier at the sampling moment, and comparing the fault positioning identifier with a preset threshold value to realize the positioning detection of the open-circuit fault phase and the fault tube. According to the method, the detected load current is subjected to online processing for open-circuit fault detection, so that the fault detection time is shortened, and online fault detection is realized.

An embodiment of the invention provides a method of realizing a heartbeat mechanism, an apparatus and a system thereof. A quantity of heartbeat responses sent by a node can be reduced so that unnecessary resource occupation cost in a distributed database system can be decreased. The scheme comprises the following steps that an exchange node acquires a heartbeat request sent by a first node to a second node, wherein the heartbeat request includes an identification of the first node and an identification of the second node; the exchange node records and receives a first moment of the heartbeat request; the exchange node inquires a second moment of receiving a second node sending message most recently by the exchange node in buffer memory information according to the identification of the second node, wherein the buffer memory information stores a corresponding relation of a moment for any one node to send a message and the identification of the node and the moment is received by the exchange node; and if an absolute value of a difference value between the first moment and the second moment is less than a threshold, the exchange node sends the heartbeat responses to the first node.

The invention discloses an implementation method of hybrid AC / DC distribution network protection, which comprises a central unit and a plurality of local units communicated with the central unit. Theimplementation method comprises the following steps: each local unit adds a time mark to analog sampling data and then sends the analog sampling data to the central unit with switching values, event information and tripping information together, and the central unit determines a fault point of a hybrid AC / DC distribution network according to the received data, and feeds back the tripping information and latching information to an associated local unit according to the fault type of the fault point so as to implement fault isolation of the associated local unit. The implementation method provided by the invention can keep the stable operation of an AC / DC system to the greatest extent, guarantees the normal power supply of non-fault regions in an AC / DC hybrid system, and reduces the power failure time and the low-voltage running time of a user so as to have very high application value.

The invention discloses a pitch fault detection system and a method and relates to a pitch fault detection system. The system comprises at least one blade, a pitch instruction generator, a blade pitch system, a model storage unit and a monitoring unit. The pitch instruction generator is used for generating at least one pitch instruction. The blade pitch system is used for regulating the pitch angle of the blade according to the pitch instruction and outputting an actual response that represents the actual pitch state of the blade. The model storage unit is used for receiving the pitch instruction and outputting an expected response that represents the expected pitch state of the blade based on a nonlinear model of the blade. The monitoring unit is used for comparing the deviation between the actual response and the expected response with a preset threshold value and judging the operation state of the blade based on the comparison result. The invention also discloses a wind turbine and a method for monitoring the blade operation state of the wind turbine.

The invention provides a port fault detection circuit. The port fault detection circuit comprises at least one repeater circuit and a processor. The at least one repeater circuit is connected with an output circuit of a port to be detected and an input circuit of the port to be detected and / or an output circuit of another port to be detected and an input circuit of the port to be detected. The processor is used for comparing a first signal acquired from the input circuit of the port to be detected with a first threshold, when the difference between the first signal and the first threshold is larger than a second threshold, it is determined that the port to be detected is faulty, wherein the first signal is a signal received by the repeater circuit from the output circuit of the port to be detected and passing through the input circuit of the port to be detected or is a signal received by the repeater circuit from another port to be detected and passing through the input circuit of the port to be detected. According to the invention, problems that the port detection cost is too high, and the detection efficiency is relatively low are solved; when the port is detected, external extra loads are not needed; by means of the connected repeater circuit, the fault port and the fault circuit can be positioned quickly.

The invention discloses a method and equipment for detecting a link fault. The method includes the steps that the detection device of network equipment detects that a first numerical value of the voltage of an interface is changed into a second numerical value; the detection device of the network equipment generates an interruption signal and outputs the interruption signal to a controller of the network equipment; after receiving the interruption signal, the controller of the network equipment determines fault point information corresponding to the interface and determines that a link corresponding to the fault point information breaks down. According to the method and equipment, fault detection time can be shortened, whole network fault perception is accelerated, and convergence time of whole network services is shortened.

The invention performs deep analysis on fault detection behaviors of process monitoring and studies change conditions of statistics when a fault happens and looks for an effective method to avoid missed detection of the fault and solve problems that monitoring statistics are not uniform and the like and looks for an effective method to improve the performance of fault diagnosis. Based on study work at present, we find that specific hidden variables which cannot be obtained through direct measurement may include characteristic information of a specific process fault and through measurement of a changing tendency of some statistics, the hidden variables which include the characteristic information are determined so that loss of useful information during statistical process monitoring can be prevented effectively and process monitoring and fault diagnosis effects can be improved. The process monitoring improvement algorithm improves the performance of the process monitoring significantly and included are mainly the following aspects: 1. fault detection time is reduced so that it is convenient for a process fault to be found timely and thus system operation risks are reduced; 2. the missed detection rate for faults, particularly some faults which cannot be detected through traditional methods is reduced; 3.loss of useful information can be prevented effectively so that conditions are provided for further fault diagnosis and fault clearing.

The communication device has a frame transfer unit that executes frame transfer via the first communication link and the second communication link, a link confirmation frame sending unit, and a return link confirmation frame monitoring unit. The link confirmation frame sending unit causes the frame transfer processing unit to send a link confirmation frame for use in confirming a normal link status via the first communication link from the communication device to the counterpart communication device. The return link confirmation frame monitoring unit performs fault detection of the first and second communication links by monitoring a return link confirmation frame which is to be returned from the counterpart communication device to the communication device via the second communication link when the counterpart communication device receives the link confirmation frame via the first communication link.

The invention relates to a test set reordering method based on estimated test performance. The method comprises the following steps: S1, generating a test set and performing simulation test; S2, estimating the fault test performance of test vectors in the test set; and S3, reordering the test set after estimation to obtain a new test set. The invention further discloses a test set reordering device based on estimated test performance. The test vectors are reordered according to the test performance, and the reordered test vectors are used for testing. Therefore, the test time of a fault circuit can be shortened, and the test efficiency can be improved.

The invention discloses a fault detection instrument of an electromobile and a fault detecting method. The instrument comprises an aerial socket,a gear selecting switch,a detection convertor,a speed controller and an instrument shell body of a voltage displayer electrically connected with the detection convertor. The gear selecting switch comprises a forward gear,a back gear and a stop gear whichcorrespond to forward,back and stop gears of the electromobile. The speed controller corresponds to an electronic throttle of the electromobile and comprises a potentiometer and a rotary knob linked switch. A first gear detecting circuit,a second gear detecting circuit,a third gear detecting circuit,a fourth detecting circuit,a fifth detecting circuit and a sixth detecting circuit which respectively detect battery set voltage,electronic throttle power supply voltage,electronic throttle speed changing voltage,stop gear voltage,forward gear voltage and back gear voltage are correspondingly connected with the detection convertor and the aerial socket. The detecting method that the instrument is in communication with the interface of a controller is adopted,based on the detecting circuits,theinstrument detects whether or not faults exist in the controller,and the detection is quick,comprehensive and high in universality.

The invention discloses an AC contactor with fault display, which includes an AC contactor body, a controller, and an indicator light; the invention uses the controller to collect pulse signals generated when each contact is powered on and off, and the controller uses the pulse signal to Judging whether each contact is faulty, and according to the judgment result, control the indicator light to indicate whether each contact is faulty or not. The invention has a simple structure, and the staff can intuitively judge the faulty contacts, which greatly saves fault detection time and manpower and material resources.

The invention relates to a detection method for a cable grounding fault. A method for detecting a grounding fault of a bridge cable, which includes: connecting one end of the faulty cable to the output end of a DC stabilized power supply, and the other end to be short-circuited to any other intact phase cable; connecting the output end of the DC stabilized power supply to the other At the other end of any one-phase cable; turn on the DC stabilized power supply to keep the output current stable at 5-10A; use a DC voltmeter to measure the values ​​V1 and V2 within the voltage range of the two ends of the faulty cable to the bridge frame; that is The rough location of the fault point of the cable can be calculated; then the DC stabilized power supply is released, and one end of the resistance gear of the multimeter is connected to one end of the faulty cable, and the other end is grounded; When the resistance value of the multimeter reaches the maximum value, that is, the position where the insulating rope moves is the fault point. The invention can be used for fast and accurate detection of the grounding fault point of the cable laying bridge.

Embodiments of the present invention provide a method, device and system for handling faults in at least one distributed cluster, at least one distributed cluster includes a first distributed cluster, and the first distributed cluster includes a first Master node and a first Slave A node, a first reference node, and a first standby node serving as a backup of the first Master node, the first standby node receiving a message sent by the first reference node including a message indicating that the first reference node and the first Master node are in a disconnected state The heartbeat message of the first indication information; the first backup node determines that the first reference node and the first Master node are in a disconnected state according to the first indication information; the first backup node sends a message to the first backup node after detecting that the first Master node In the case that the heartbeat message is interrupted, it is determined that the first backup node is also in a disconnected state with the first Master node; the first backup node determines that the first Master node has failed. In the embodiment of the present invention, the fault detection time can be effectively shortened.

A windshield impact deformation fault identification and detection method, storage medium and equipment belong to the technical field of image detection. In order to solve the problems of low detection accuracy and low detection efficiency in the existing manual image inspection method. The present invention utilizes the image input windshield hitting deformation fault recognition network to detect the fault of the image to be detected; the windshield hitting deformation fault recognition network adopts the combined network of Trident and residual network, and in each branch of the combined network, the last level of residual network the output of a l+1 , passed to the GAP layer and the FC layer, and then passed to the ReLU activation function, and then passed through a FC layer, passed to the activation function to obtain the threshold; the threshold and the output of the last level of residual network are soft-thresholded; at the same time, the activation The output result of the function is branched, and it is normalized through an FC layer and a Softmax activation layer, and then combined with a l+1 Multiply to get the branch detection result; add the detection results of the three branches to get the final output. Fault identification for windshield strike deformation.

A distribution protection collaborative architecture including a flexible interconnection device, a device, and a collaboration method. Under a frame of collaborative control, the rapid state sensing of a power electronic device of the alternating current (AC) and direct current (DC) flexible interconnection device and the AC side feeder protection control device are used to achieve rapid fault locating and fault removal, enabling rapid self-recovery of a region fault of a full AC and DC system. The present invention is proposed to achieve, by means of a GOOSE communication network based on region high-speed information interaction, global information high-speed communication of smart devices, including the flexible DC interconnection device, in the same AC and DC system, and automatically realize rapid fault locating and isolation of a protection device according to a pre-set condition. With respect to a protection configuration manner of a traditional power distribution system, the present invention has a higher fault handling speed and a better collaborative fault handling capability.

The invention discloses an SSTDR-based handheld cable fault detection system and method, and belongs to the field of line detection. The method uses an SSTDR method for building hardware models for signal loading, receiving, collection, processing and the like of a detection system; the cable fault positioning, fault type judgment and uninterruptible power online detection are realized; a power supply department is helped to timely and accurately discover and eliminate the fault and to conveniently perform operation inspection work; the power supply reliability is improved. The system and themethod are suitable for the detection and position of the cable gap fault; the cable can be reliably detected under the condition of not interference the normal work signals; the cable fault positioning, fault type judging and uninterruptible power online detection are realized; the system and the method help the power supply department to timely and accurately discover and eliminate the fault; the operation and inspection work is convenient; the power supply reliability is improved.

The application discloses an intelligent voltage fault detecting device, which comprises a surge voltage detecting module, an operation overvoltage detecting module, a fault alarm module, a main control module, a communication module and a power module, wherein the surge voltage detecting module and the operation overvoltage detecting module are connected with the same line in a power grid respectively, the surge voltage detecting module is connected with the fault alarm module and the main control module by means of high-speed optocouplers respectively, the operation overvoltage detecting module is connected with the fault alarm module and the main control module by means of optocouplers respectively, and the main control module is connected with a main station by means of a communicationmodule. The intelligent voltage fault detecting device can detect an operation overvoltage fault with a small voltage value and long duration and a transient surge voltage with a great voltage valuein a targeted manner respectively, and activates the fault alarm module by means of the high-speed optocouplers and the transient, so as to identify the overvoltage condition in the line quickly and automatically, thereby being convenient for taking troubleshooting measures timely, being conductive to shortening the fault detection time and improving the fault detection efficiency.

The invention discloses a crash consistency fault detection method and system for a persistent memory concurrent program, and the method comprises the steps: S1, carrying out the instrumentation of a memory access instruction in a to-be-detected persistent memory concurrent program and a persistent memory related interface through a compiler, and obtaining an executable program; S2, according to an input rule of the to-be-tested persistent memory concurrent program, generating a plurality of input parameters as input of an executable program to form an input parameter set; S3, separately acquiring a memory access mode corresponding to a persistent memory address accessed by each memory access instruction in the executable program under each input parameter, and controlling the executable program to generate a memory access time sequence of writing first and then reading, and then controlling the memory access mode corresponding to the persistent memory address accessed by each memory access instruction in the executable program; determining whether a mode of writing a persistent memory based on unpersistent data exists in each memory access mode, and if so, determining that a consistency fault exists. According to the method, the consistency fault in the persistent memory concurrent program can be efficiently and accurately detected.

The invention discloses an inverter online open-circuit fault detection method. Firstly, the two-phase current of the inverter is collected, and then the amplitude and phase of the three-phase current at the sampling time are calculated, and then the three-phase current at the sampling time is calculated based on the method. The per-unit value of the sum of the absolute values ​​of the current, compare this per-unit value with the preset threshold to determine whether an open-circuit fault occurs, and if it occurs, perform fault location based on the three-phase current. The specific method is to perform a per-unit Then perform zero-crossing and “one” processing on the unitized current, calculate the fault location identification at the sampling time, compare the fault location identification with the preset threshold, and realize the location detection of the open circuit fault phase and the fault tube. The invention performs on-line processing on the detected load current to perform open-circuit fault detection, reduces fault detection time, and realizes on-line fault detection.

The invention provides a matrix switch relay failure detection device and detection method. By adding a circuit board, a resistor with the same resistance value is connected in series with each signal output channel of the matrix switch, and the resistance value of the parallel resistance is measured for multiple switch channels. According to The change of the measured value judges whether there is a fault in the switching relay. The present invention does not need to close and disconnect all matrix switch relays sequentially, and adopts the level-by-level average grouping method to measure the resistance value of multi-way switches with relay faults, and narrows the detection range step by step, which can greatly shorten the fault detection time and improve the detection efficiency , especially for large-scale matrix switches.

The invention discloses a real-time detection device and method for the breakage of the down-conductor of the fan blade, comprising a sensor installed between the down-conductor inside the blade and the flange of the blade, and the sensor includes a first sensor electrically connected to the down-conductor A terminal and a second terminal electrically connected to the blade flange, a spark gap is formed between the first terminal and the second terminal; both the first terminal and the second terminal are electrically connected to a spark gap charge measurement circuit; the sensor is wired or wirelessly connected There are signal analysis and logic units. The invention can judge the operation state of the down conductor of the blade in real time, quickly locate the faulty fan, monitor in real time, ensure the operation reliability of the fan and greatly shorten the fault detection time of the fan.

Embodiments of the present invention provide a method and device for detecting faults in an electricity consumption information collection system, which relate to the field of communication, can automatically detect faults in the power consumption information collection system, and improve the fault detection efficiency of the power consumption information collection system. The detection method is applied to a detection device for faults in the electricity consumption information collection system, and includes: the detection device obtains the reading result of the reading of the first electric meter by the concentrator in the electricity consumption information collection system, and the reading result is used to indicate whether the reading is successful ; If the reading result indicates that the reading fails, then the detection device detects the communication channel between the concentrator and the first ammeter, and obtains the detection result of the communication channel, and the detection result is used to indicate whether there is a fault in the communication channel; As a result, it is determined that there is a failure in the communication channel or that there is a failure in the first electric meter.

The invention provides a self-detection method for a rotating mechanism control system in an airborne photoelectric detection device. The method comprises the self-detection of a control element, a control circuit board and the shafting friction moment uniformity. An angle measurement coded disc, a speed measurement gyro, a power supply board and a power amplifier board are provided with hardware self-detection signals. Whether the work is normal is judged by reading a hardware self-detection signal. A motor does not have a self-detection signal. On the basis of normal work of the angle measurement coded disc, the power supply board and the power amplifier board, a positive force is applied to the motor. If increased coded disc angle is detected, the motor is normally works. When the motor is detected, the coded disc differential speed is calculated in real time. If the differential speed of a position is less than a certain threshold, the friction torque of the position is too large. Through the detection method, whether all parts of the control system normally work can be quickly acquired, so as to timely carry out abnormal protection measures; the fault detection time is reduced; and the detection efficiency is improved.

The invention discloses a clutch and separation device for a running-in rack of an engine. Two bilateral side supports (2) are fixed on a chassis (1), a cross beam is connected between the upper parts of the two bilateral side supports (2) and provided with a clutch pedal assembly (3) and an upper support (4), an oil storage tank (5) is supported on the upper support (4) and connected with a main pump oil port of the clutch pedal assembly (3) by a first oil pipe (6), and the main pump oil port of the clutch pedal assembly (3) is connected with a second oil pipe (7). Through the principle for simulating clutch separation of the whole car, the abnormal sound fault position of the engine can be accurately found by a running-in person, the fault detection time of the engine can be saved, and the detection efficiency can be effectively improved; and the clutch separation device is further helpful for gear shifting simulation in running-in test of the engine, leading the gear shifting operation to be easy and effort-saving, and eliminates the misjudgment drawbacks including clamping in gear shifting and incapability of gear shifting in the background art.