34results about How to "Accurately judge the fault" patented technology

The invention discloses a switching value acquisition method and device. The method comprises that a signal delay unit is added in a switching value circuit, a self-checking signal is added in an acquisition circuit during acquisition, the switching value circuit performs delay processing on the self-checking signal through the signal delay unit, a self-checking feedback signal after the acquisition delay of the acquisition circuit delay, and whether the acquisition is accurate is determined through the fact that whether the delay of the self-checking feedback signal relative to the self-checking signal is a preset delay time. An acquisition loop of the switching value acquisition device comprises the acquisition circuit and the switching value circuit, wherein the acquisition circuit comprises a self-checking signal generation unit, and the switching value circuit comprises the signal delay unit. According to the switching value acquisition method and device, not only the number of external wires can be reduced, but also whether faults or mixing occurs to external cables can be determined accurately, and accordingly, the effectiveness and the accuracy of switching value acquisition are improved greatly.

The invention discloses a tail gas disposal system and a DPF temperature control system and a control method thereof. The tail gas disposal system comprises a catalyst conversion device which comprises a tail gas channel, a cone-shaped neck, a DOC and DPF. An external hydrocarbon injection device is connected to the tail gas channel, a first temperature sensor is arranged on the upstream side of the DOC, a first differential pressure sensor is arranged on the upstream side of the DOC, a second temperature sensor and a third temperature sensor are separately arranged on the upstream and downstream sides of the DPF, and a second differential pressure sensor for measuring the outlet pressure of the DPF and the pressure difference of the DPF is arranged on the DPF. A controller is electricallyconnected to an internal combustion engine, the first temperature sensor, the second temperature sensor, the third temperature sensor, the first differential pressure sensor and the second differential pressure sensor separately. Whether the tail gas disposal system has faults or not can be judged accurately and the fault type can be judged accurately according to the hydrocarbon conversion efficiency of the DOC and the DPF for maintenance, so that the maintenance judging time is shortened.

Disclosed is an overvoltage protection circuit. An output voltage analog signal which basically changes along with an output voltage synchronously is obtained, and meanwhile, whether the output voltage analog signal and a feedback voltage represent totally opposite information or not is judged. On the basis, whether overvoltage is caused by the fault of a potential-divider network of an external resistor can be judged accurately, so as to provide effective overvoltage protection. Meanwhile, the invention also discloses an integrated circuit and a switch converter applying the overvoltage protection circuit.

The light signal the fault part inside closed electric power equipment produces is acquired with optical fiber, signal distinguished and amplified in the signal distinguishing and amplifying circuit to separate discharge signal and / or overheat signal; and the type, degree and position of the fault inside the equipment are judged in the signal processing circuit based on the signal type, size and distribution. The said method is simple, practical, accurate and reliable, and may be used in the in-situ monitoring of main transformer equipment.

The invention relates to a fault detection and positioning method for a rotary rectifier of an aeronautical brushless electric excitation synchronous motor. Through Euler distance and the proximity principle, a condition that whether a fault occurs and a type of the fault are judged, then an upper arm fault or a lower arm fault is judged through a sum of a maximum value and a minimum value of fault phase current in one cycle, and the fault diagnosis and positioning can be realized. The method has the advantages that (1) whether the rotary rectifier is failed can be accurately determined, and (2) a diode with an open circuit can be accurately positioned.

The application discloses a transformer on-load tap changer fault diagnosis system that includes an acceleration sensor arranged on the housing of a transformer and configured to detect a vibration signal during the operation of an on-load tap changer; a current sensor having a signal detection end clamped to any phase of power line of a driving motor for driving the on-load tap changer to operate in order to detect the current signal of the driving motor; an interference signal filtering module connected with the current sensor and the acceleration sensor and configured to filter out interference signals; a host computer comprising an envelope detection module, an analysis module and a display module, wherein the envelope detection module and the analysis module are connected with the interference signal filtering module and are connected with the display module. The transformer on-load tap changer fault diagnosis system inputs the filtered vibration signal and current signal into the envelope detection module and the analysis module for analysis to accurately determine the faults of the on-load tap changer.

The invention provides a dredging control system for a pump truck, which comprises a discharging height collecting unit, a pumping state collecting unit, a processor and a control element, wherein the discharging height collecting unit is used for collecting the present discharging height information of the pump truck; the pumping state collecting unit is used for collecting the present pumping state information of the pump truck; a pumping state threshold value corresponding to the discharging height is preset in the processor; the processor is used for confirming the present pumping state threshold value according to the present discharging height information of the pump truck, comparing the present pumping state information with the present pumping state threshold value, confirming a pipe plugging fault if the present pumping state information is more than or equal to the present pumping state threshold value, and sending an actuating signal to the control element; and the control element executes the corresponding operation according to the actuating signal so as to eliminate the pipe plugging fault. According to the technical scheme provided by the invention, the pipe plugging fault can be accurately judged and effectively warned, and the effective measures are taken for solving the pipe plugging fault. The invention also provides the pump truck and a dredging control method for the pump truck.

An intelligent elevator monitoring system based on NB-IOT wireless communication comprises an elevator state monitoring device, an NBIOT wireless communication module, an unvarnished transmission cloud server and a server. The elevator state monitoring device is connected with the elevator control cabinet and used for collecting elevator running state information and transmitting the abnormal elevator running state information to the transparent transmission cloud server through the NB-IOT wireless communication module, and the transparent transmission cloud server summarizes received serial port data of all elevators into original data streams and then sends the original data streams to the server. The server carries out timing processing on the summarized abnormal elevator data, and if the abnormal data does not reach the occurrence frequency standard within the limited time range, the abnormal data is marked as early warning information; and if the number of times of continuous reporting of the abnormal data exceeds a threshold range set within a limited time range, the abnormal data is marked as fault data, and an alarm is reported. According to the invention, faults can be judged more accurately under the condition of ensuring timeliness, and the false alarm rate of the monitoring system is reduced.

The invention discloses a hand strap protection device which comprises a hand strap, a rolling wheel for tensioning the hand strap, a metal component arranged on the rolling wheel, a support installed on the rolling wheel and a probe which is arranged on the support and can detect the metal component. The rolling wheel can be connected to the support in the manner that the rolling wheel rotates in the axial direction of the rolling wheel. The support is connected to an escalator component in a vertical moving manner through guide rods, and elastic parts are connected between the guide rods and the escalator component. The escalator component is further provided with a round check block, and the round check block is provided with a groove. The escalator component is further fixedly provided with a safety switch, and a contact of the safety switch is contained in the groove. Connecting pieces capable of pulling the round check block to rotate are connected between the round check block and the guide rods. After the round check block rotates, the groove ejects the contact of the safety switch to trigger the safety switch. The hand strap protection device has the various functions of automatic hand strap tensioning, hand strap loosening interference resistance, hand strap excessive loosening protection, hand strap breakage protection and the like, and is safe, reliable and convenient to install.

The invention relates to a commutation opportunity determination method and a commutation system for three-phase unbalanced commutation. The method comprises the steps of converting a multi-objectiveoptimization problem into a single-objective optimization model through a constraint method, solving an optimal solution set of the single-objective optimization model in combination with a genetic algorithm and a simulated annealing algorithm, determining an optimal solution in the optimal solution set, determining the optimal solution as a commutation opportunity, and determining a to-be-switched load and a switching sequence thereof based on the commutation opportunity so as to carry out switching. According to the method, multiple targets are converted into one target, the calculation efficiency is improved, the number of generated current optimal solutions is controlled by adjusting breakpoints of constraint conditions, and high objectivity is achieved. Secondly, through combination of a genetic algorithm and a simulated annealing algorithm, a global optimal solution can be rapidly and accurately obtained, safety risks caused by three-phase imbalance are effectively avoided, and the level of power grid operation planning is improved. In addition, three-phase imbalance states of transformers of different types and different capacities can be analyzed, and the application rangeis wide.

The embodiment of the invention discloses relay protection method and device. After acquiring a real-time frequency of an AC signal, the relay protection device of the embodiment of the invention screens the real-time frequency in advance; if the real-time frequency is in a preset range, the relay protection device adjusts a first timer and controls an AC sampling frequency according the real-time frequency; and if the real-time frequency is not in the preset range, the relay protection device adjusts a first timer and controls the AC sampling frequency according to a rated frequency of the AC signal. Accordingly, the invention can reliably carry out relay protection to a power system.

The invention discloses an auxiliary relay protection monitoring processing system and a processing method thereof. The auxiliary relay protection monitoring processing system comprises a data obtaining unit, a data processing unit, a data information extraction unit, a data monitoring device, a real-time data recording system, a relay protection monitoring server, a fault information analysis display unit, a control unit and a relay protection unit; an input end of the data processing unit is connected with a power grid dispatching center and an output end is connected with an input end of the relay protection unit respectively through the data processing unit, the data information extraction unit, the fault information analysis display unit and the control unit; an output end of the data detection device is connected with the fault information analysis unit sequentially through the real-time data recording system, the relay protection monitoring server and the fault information analysis display unit. The auxiliary relay protection monitoring processing system and the method can accurately position the fault reason and fault points, reduces the power failure time for overhaul, improves the utilization relate and the operation reliability of equipment and meanwhile reduces overhaul costs.

An intelligent tour inspection device for a feeder cable channel comprises a body, driving wheels and a control board. A holder is movably arranged at the top of the body, a rotatable camera is arranged on the holder, and a telescopic board is movably arranged at the front end of the body. Compared with the prior art, the intelligent tour inspection device can be remotely controlled, faults can berapidly and accurately judged by the aid of the rotatable camera and an infrared temperature measuring device, the telescopic board is movably arranged at the front end of the body, so that obstaclescannot impact the body in advancing, small obstacles can be pushed away, throughput capacity is improved, various complex terrains can be overcome to perform tour inspection by the aid of a laser radar and the driving wheels with lifting structures, and the intelligent tour inspection device is small in size, wide in applicability and convenient to use.

The invention provides a driver air conditioner test bed system which comprises a controller, an air conditioner power supply control box and a power module. The controller is provided with a liquid crystal display. The air conditioner power supply control box is electrically connected with a control panel, and the control panel is used for sending control signals to the air conditioner power supply control box. The power module is electrically connected with the air conditioner power supply control box which is used for being electrically connected with a driver air conditioner to be detected. The driver air conditioner test bed system is easy and convenient to operate, and improves maintenance quality of products, ensures driving safety, reduces maintenance cost and manufacturing cost, and improves labor production efficiency.

The invention provides a trouble shooting and locating method for a power distribution network. The method includes steps of 1, current information is obtained and sent to an information collecting unit; the information collecting unit collects preset current data information of a power distribution terminal and sends the data information together with the collected current information to a data analyzing unit; 3, the data analyzing unit compares the collected data and obtains a data level corresponding to optical signals; 4, a fault locating module collects a fault level and fault analysis information after judgment and performs analysis and locating according to the received data information and displays the information after locating through a fault display unit; 5, when the fault level surpasses a preset range or the fault locating module cannot locate the fault, an alarm device sends out an alarm. The method provided by the invention can be used for locating fault reasons and fault locations accurately, time of power interruption for maintenance is reduced, equipment utilization rate and operation reliability are improved and maintenance cost is reduced at the same time.

Provided in the invention is a detection and protection system for a water cooling fault of tumour microwave ablation. A tumour microwave ablation water-cooling system is a circulating system formed by successive series connection of a water containing device, a peristaltic pump, and a microwave ablation antenna needle by a cooling circulating pipeline; and the microwave ablation antenna needle is connected with a microwave host by a microwave output coaxial cable. The detection and protection system comprises a water flow photosensitive receptor for detecting a water flow signal in the cooling circulating pipeline, an alarm device for carrying out sounding alarming when the water flow photosensitive receptor can not feel a water flow signal, and a control unit for cutting off a microwave host circuit when the water flow photosensitive receptor can not feel a water flow signal. According to the invention, the water flow situation in the cooling circulating pipeline is detected to determine whether a fault occurs at the tumour microwave ablation water-cooling system accurately, thereby guaranteeing safety implementation of the microwave thermal ablation operation. The system having advantages of simple structure and low cost is suitable for popularization and application.

The invention discloses an electric energy monitoring method for a transformer substation, which comprises the following steps: S1, data acquisition; collecting electric power data at a field monitoring terminal arranged at each detection point of the transformer substation; wherein the electric power data comprise instantaneous voltage and current amplitudes acquired by adopting a voltage transformer and a current transformer; S2: data transfer; the field monitoring terminal transmitting the acquired electric power data to a server; and S3: data processing and monitoring; the server processing the electric power data and analyzing the voltage amplitude and phase angle, the current amplitude and phase angle, the power factor, the harmonic parameters, the active power and the reactive power; storing the processing result in the server; a monitor accessing the server to acquire monitoring data through a mobile phone APP or a PC; and the electric energy monitoring method for the transformer substation can detect the electric energy quality in an all-around mode and is easy to implement.

The invention discloses a modularized electronic miniature circuit breaker, wherein a circuit signal acquiring device, a circuit board assembly and a relay are integrated in a modularized housing, so that the circuit breaker realizes functions of large-current instantaneous tripping, small-current time delay tripping, overload tripping, overvoltage protecting, undervoltage protecting, protection selectivity, multifunctionality, interactive communication, etc. The invention further discloses an electrical system with the electronic miniature circuit breaker for realizing protection selectivity, and a multi-pole modularized electronic miniature circuit breaker.

The invention provides a decision-making method and system for fault mode and influence analysis and a storage medium. The decision-making method comprises the steps of obtaining device state data ofeach monitoring point of a target device state; carrying out template matching on the target data stream template and a normal template; when the template matching degree of the target data flow template and a normal template is smaller than a first standard threshold value, determining that the target data flow template is a fault data flow; carrying out template matching on the target data flowtemplate and a fault data flow template, wherein the fault data flow template is a data flow template when equipment has a fault; when the template matching degree of the target data flow template anda fault data flow template is greater than or equal to a second standard threshold, determining that the target data flow template corresponds to a registered fault, and outputting a decision corresponding to the target data flow template; otherwise, determining that the target data flow template corresponds to a new fault. The method can adapt to the flexibility and variability of hardware forms, and can accurately judge faults and give decisions.

The invention relates to a fault detection and positioning method for a rotary rectifier of an aeronautical brushless electric excitation synchronous motor. Through Euler distance and the proximity principle, a condition that whether a fault occurs and a type of the fault are judged, then an upper arm fault or a lower arm fault is judged through a sum of a maximum value and a minimum value of fault phase current in one cycle, and the fault diagnosis and positioning can be realized. The method has the advantages that (1) whether the rotary rectifier is failed can be accurately determined, and (2) a diode with an open circuit can be accurately positioned.

The light signal the fault part inside closed electric power equipment produces is acquired with optical fiber, signal distinguished and amplified in the signal distinguishing and amplifying circuit to separate discharge signal and / or overheat signal; and the type, degree and position of the fault inside the equipment are judged in the signal processing circuit based on the signal type, size and distribution. The said method is simple, practical, accurate and reliable, and may be used in the in-situ monitoring of main transformer equipment.

The invention discloses an external hydrocarbon jetting device which comprises a control manifold, a fuel oil electromagnetic valve, a fuel injector, a pressure sensor, a buffer device and a controller. The control manifold is provided with four ports; the ports communicate mutually so as to form a hollow chamber; the controller is electrically connected with the fuel oil electromagnetic valve, the fuel injector and the pressure sensor; one port of the control manifold is connected with a hydrocarbon source through the fuel oil electromagnetic valve; one port of the control manifold is connected with the fuel injector; one port of the control manifold is connected with the pressure sensor; one port of the control manifold is connected with the buffer device; the controller controls the fuel oil electromagnetic valve to power on so as to switch on; the hydrocarbon source enters the control manifold through the fuel oil electromagnetic valve, flows to the fuel injector and is injected; the pressure sensor detects the hydrocarbon pressure in the control manifold and back-feeds to the controller; and the controller controls the flow of injected hydrocarbon compounds through controllingthe power-on and power-off time of the fuel injector. According to the external hydrocarbon jetting device provided by the invention, a temperature control performance in a tail gas treatment systemcan be improved, and meanwhile, the warranty cost is reduced.

Provided in the invention is a detection and protection system for a water cooling fault of tumour microwave ablation. A tumour microwave ablation water-cooling system is a circulating system formed by successive series connection of a water containing device, a peristaltic pump, and a microwave ablation antenna needle by a cooling circulating pipeline; and the microwave ablation antenna needle is connected with a microwave host by a microwave output coaxial cable. The detection and protection system comprises a water flow photosensitive receptor for detecting a water flow signal in the cooling circulating pipeline, an alarm device for carrying out sounding alarming when the water flow photosensitive receptor can not feel a water flow signal, and a control unit for cutting off a microwave host circuit when the water flow photosensitive receptor can not feel a water flow signal. According to the invention, the water flow situation in the cooling circulating pipeline is detected to determine whether a fault occurs at the tumour microwave ablation water-cooling system accurately, thereby guaranteeing safety implementation of the microwave thermal ablation operation. The system having advantages of simple structure and low cost is suitable for popularization and application.

The invention relates to vehicle diagnosis system and method based on an internet C / S mode. The method comprises the steps of: 1, establishing a connection between a terminal user and a server; 2, carrying out authentication on the terminal user and the server; 3, determining a vehicle type by the terminal user, sending the vehicle type information to the server to obtain a corresponding vehicle diagnosis program; 4, operating the diagnosis program, carrying out function diagnosis on the vehicle; 5, sending information to the server to obtain core library data required by the corresponding function; 6, computing the obtained core library data and displaying a result; and 7, judging whether ending the operation or not, if not, executing the next function diagnosis. The system is a C / S forming mode based on a certain central center on internet as a core, and has simple construction and convenient use. The method is convenient for uniform maintenance for the diagnosis core data, so that the fault of the vehicle can be accurately judged by using newest diagnosis data at any time as long as the server is linked.

The invention relates to an aviation three-stage synchronous motor rotating rectifier fault detection and fault locating method, which is characterized by judging whether a rotating rectifier has fault through distortion rate residual errors of waveform, and if having fault, judging whether the fault is short circuit or open circuit or upper arm diode or lower arm diode fault through the sum valueof the maximum value and the minimum value of phase current of a three-phase rotor of a main exciter, and thus the method can realize a fault diagnosis and locating function. The beneficial effects are that the method can accurately judge whether the rotating rectifier has fault and can accurate locate which diode has short circuit or open circuit.

A JTAG data capture and analysis system comprises a JTAG communication signal acquisition sub-module, a communication signal analysis and communication protocol analysis sub-module and a user interaction sub-module. The JTAG communication signal acquisition sub-module acquires a JTAG communication signal between a target processor and a simulator through an ADC. The communication signal analysis and communication protocol analysis sub-module diagnoses a communication fault existing between the target processor and the simulator by analyzing the waveform of each signal in a JTAG debugging interface and communication data of a higher layer, and determines a fault source between two communication parties. The user interaction sub-module displays the wrong communication signal and the failed communication protocol and gives a fault diagnosis result. The fault source in JTAG communication is diagnosed by analyzing the communication protocol of the JTAG debugging interface, so that the debugging efficiency of the processor is improved.

The invention relates to an AC bus differential protection method, which belongs to the technical field of flexible direct current transmission. The present invention proposes an AC bus differential protection method aiming at the topological structure of connecting the AC bus on the variable valve side in parallel with three-phase reactors and the configuration of its measuring points. Then calculate the current of each phase of the grounding reactor according to the grounding resistance and the actual parameters of the reactor; calculate the difference based on the collected current of each phase on the valve side, the current of each phase on the valve side of the starting circuit and the calculated current of each phase of the grounding reactor The absolute value of the current; judge whether the current difference is greater than the protection setting value, if greater, start the AC bus differential protection. The invention can quickly and accurately judge faults and effectively protect the whole system.