86results about How to "Avoid critical failure" patented technology

The invention provides a wind generating set remote on-line multi-mode health state monitoring and fault diagnosis system. The system comprises a wind speed/generated energy monitoring device, a temperature/vibration monitoring device, a voice frequency monitoring device and video monitoring device. The system is characterized by further comprising a lower computer and an upper computer, wherein the lower computer is connected with a wind generating set, and the upper computer is connected with a network client. Meanwhile, the audio and video technique is utilized, and remote observation of the operation state of the set is achieved. The system has the advantages of being simple in operation, and capable of achieving remote monitoring and remote diagnosis of faults.

The invention belongs to the technical field of testing and relates to a performance degradation testing method of an insulated gate bipolar transistor. According to the method, the insulated gate bipolar transistor is taken as an object, a programmable pulse generator, a programmable electronic switch, a programmable digital universal meter, a power resistor, a working resistor and a direct current power supply are utilized, and offset values of conduction saturation voltage of the insulated gate bipolar transistor along with the impact number of times of short-circuit current under different short-circuit current values can be obtained through short-circuit current impact and further used as performance degradation data of the insulated gate bipolar transistor. According to the method, the accurate performance degradation data of the insulated gate bipolar transistor caused by short-circuit current can be obtained within a short period of time, and the data can be utilized for accurately predicting the failure time of the insulated gate bipolar transistor in the using process so as to take measures in time before the failure of the insulated gate bipolar transistor, prevent serious faults caused by the failure of the insulated gate bipolar transistor and further reduce the economic loss.

The invention discloses a rainwater-collection recycling system and a construction method thereof. The rainwater-collection recycling system comprises a control system, an initial-rainwater flow dividing well, a water storage pool, a first lifting well, a filtering disinfecting chamber, a clean water pool and a second lifting well, wherein the initial-rainwater flow dividing well, the water storage pool, the first lifting well, the filtering disinfecting chamber, the clean water pool and the second lifting well are sequentially communicated. The first lifting well is communicated with the bottom of the water storage pool and arranged in the water storage pool, and the second lifting well is communicated with the bottom of the clean water pool, arranged in the clean water pool and connected with a recycling point pipe; a stopping weir is arranged in the initial-rainwater flow dividing well, a flow discarding groove is formed in the lower portion of the stopping weir, a rainwater feeding pipe is arranged on the side wall of a water distribution area, the height of the rainwater feeding pipe and the height of the pipe bottom of a first water discharging pipe are larger than or equal to the height of the groove top of the flow discarding groove, and the pipe bottom of an overflowing pipe is flush with the groove bottom of the flow discarding groove; a plurality of back washing pipes are laid on the bottom of the water storage pool, the outer surface of the water storage pool and the outer surface of the clean water pool are sequentially covered with an anti-seepage film layer preventing water seepage and a geotechnical cloth layer from inside to outside, construction and maintenance are convenient, and the recycled rainwater quality is high.

The invention discloses an over temperature protection method for an ISG (Integrated Starter Generator) of a hybrid electric vehicle. When the ISG is about to achieve a temperature threshold value, the purpose of preventing the ISG from being burnt due to overhigh temperature is achieved by virtue of restricting the power of the ISG. By virtue of the motor, ISG over temperature protection is timely and effective, and charge and discharge performances of an entire-vehicle power battery are slightly influenced.

The invention discloses an abnormity identification method and a monitoring platform for domestic sewage treatment facility. The method comprises the following steps: S1, acquiring current and outletflow data of a sewage lift pump in a normal working state within a specific time, and current and outlet flow data of the sewage lift pump before a fault occurs and within a specific time, so as to construct an abnormity analysis data set, S2, performing clustering analysis on the abnormity analysis data set through a clustering algorithm to obtain an abnormity data cluster; S3, obtaining a numerical boundary according to the exception type data cluster, and constructing an abnormity identification model; S4, collecting current and outlet flow data of the sewage lift pump, and inputting the current and outlet flow data into the abnormality identification model to perform abnormality judgment, and further performing sequential analysis on the abnormal data cluster to obtain a time boundary,and adding the time boundary into the abnormal recognition model. According to the abnormity identification method, comprehensive judgment is carried out on the data in the time boundary, and early warning can be carried out on initial abnormal operation of the sewage treatment facility.

The invention discloses an anomaly detection method and an anomaly detection system, which relate to the field of detection. The anomaly detection method comprises the steps of: acquiring a multi-dimensional time sequence matrix used for representing a normal state of an object to be detected; establishing a two-dimensional self-organized mapping feature network structure, and performing iterativetraining on the multi-dimensional time sequence matrix by means of the two-dimensional self-organized mapping feature network structure, so as to obtain a multivariable state estimation memory matrix; and performing anomaly detection on data to be detected of the object to be detected according to the multivariable state estimation memory matrix. The anomaly detection method and the anomaly detection system provided by the invention improve the precision of anomaly detection of complex hop data, and can effectively solve the problem of high erroneous detection rate of anomaly detection of thecomplex hop data.

The invention relates to an anticipated accident selection method for an electric power system with uncertain injection power. The method comprises the following steps: (1) performing static security analysis modeling on the electric power system with uncertain bus injection power; (2) generating anticipated accident set data information; (3) simulating anticipated accidents and determining that an uncertain amount of electric power system state information is contained after the accidents; (4) determining system state interval indexes after the anticipated accidents; (5) comparing corresponding interval indexes of the accident set; (6) sequencing fault indexes and selecting an anticipated event. By adopting the static safety analysis anticipated accident selection method for the system, system running personnel can know the static safety level of the electric power system within a future period of time, and the power grid running reliability and stability are enhanced.

The invention provides a wine cabinet allowing a wine bottle to be stored and taken out automatically and a control method of the wine cabinet. The wine cabinet comprises a hollow cabinet body, multiple wine bottle retaining members, a wine bottle storage and take-out mechanism and a control device, wherein wine storage spaces are defined in the hollow cabinet body, and a storage and take-out opening is formed in the top wall of the hollow cabinet body; the multiple wine bottle retaining members are fixed on the circumferential side wall of the hollow cabinet body; the wine bottle storage and take-out mechanism is configured to perform storage and take-out operation on the wine bottle and comprises a motion actuation mechanism and a wine bottle take-out and storage member fixed on the motion actuation mechanism; the control device comprises a self-inspection module and a motion control module, the self-inspection module is configured to determine that the wine bottle take-out and storage member is located in a preset original position, and the motion control module is configured to drive the motion actuation mechanism to drive the wine bottle take-out and storage member to store the wine bottle on a designated wine bottle retaining member or take out the wine bottle from the designated wine bottle retaining member from the original position. Accordingly, whether the wine bottle storage and take-out mechanism is located in the preset original position can be determined before the storage and take-out process, and the wine cabinet allowing the wine bottle to be stored and taken out automatically can store and take out the wine bottle reliably.

The invention discloses a centralized monitoring transformer substation risk identification early warning system and a working method thereof, and relates to the field of electric power operation andmaintenance. A traditional monitoring means is difficult to realize effective management and control on three monitoring risks of equipment defects, frequent light words and suppression signals. The centralized monitoring transformer substation risk identification early warning system synchronously collects data of a master station and a station server, performs statistical analysis, calculation,verification and special analysis on the data including equipment defects, frequent light words and suppression signals, and generates an intelligent risk identification result and a corresponding risk list based on a centralized monitoring risk library; corresponding on-site operation and maintenance units and automatic operation and maintenance personnel are informed and disposed according to safety risk levels, and timely management and control of the equipment defects, constant light words and suppression signals are realized. According to the technical scheme, the risk online management and control rate is improved, the risk management and control time limit is shortened, and the power grid monitoring risk management and control level is improved.

The invention discloses a control method for a head shaking system. The head shaking system comprises a shell, a head shaking assembly, a magnet, a detection assembly, a head shaking rotating shaft and a two-way synchronous motor; the detection assembly is used for generating a midpoint detection signal when the magnet approaches; the control method comprises the following steps: judging whether the midpoint detection signal is detected within a first preset time; if the midpoint detection signal is not detected, increasing a count value; judging whether the count value reaches a preset threshold; if the count value reaches the preset threshold value, controlling the two-way synchronous motor to stop rotating; if the midpoint detection signal is detected, controlling the two-way synchronous motor to continue rotating in the original head shaking direction, and after a second preset time, controlling the two-way synchronous motor to rotate reversely to change the head shaking direction. According to the control method, the head shaking system can be controlled to work normally, and corresponding treatment can be performed in fault or abnormal situations, so that the stability of the system is improved. The invention also discloses the head shaking system, a fan and a warm air blower.

The invention relates to a cable buffer layer state evaluation method based on electric field analysis, and the method is mainly characterized in that the method comprises the following steps: carrying out the state detection of an XLPE cable in an operation state, and checking an XLPE cable which may have a defect; acquiring characteristic parameters of the XLPE cable which may have defects; building a cable structure platform by utilizing finite element software COMSOL, and building a finite element simulation model; adding a physical field; adding materials; setting boundary conditions; setting the grid as a physical field control network; setting a research type, and calculating electric field intensity; and judging the state of the cable buffer layer according to the calculated electric field intensity. The invention is not limited to qualitative analysis of the defect problem of the cable buffer layer any more, a quantitative analysis model is established based on a finite element method, a clear judgment basis is provided, maintainers can make accurate pre-judgment and take measures in advance, serious faults are avoided, and safe and reliable operation of an urban power system is guaranteed.

The invention discloses a method and system for monitoring a fault of a secondary exciter. The method comprises: phase voltages of a secondary exciter end are detected in real time; if all positive sequence voltages in the detected phase voltages are reduced to be a first threshold value and negative sequence voltages occur at the same time, inter-turn short circuit fault occurrence is determinedand alarming is carried out; if the phase voltages include three-phase voltages and the three-phase voltages are simultaneously lowered to be second threshold values or the phase voltages include two-phase voltages and negative sequence voltages occur in the two-phase voltages, inter-phase short circuit fault occurrence is determined and alarming is carried out; and if a zero-sequence voltage occurs, grounding short-circuit fault occurrence is determined and alarming is carried out. According to the invention, uninterrupted real-time monitoring is carried out during the running of the motor and thus the operating state, a fault part, and a fault cause of the single machine are determined. Alarming is carried out accurately before a serious fault occurring at a permanent-magnet auxiliary exciter and thus emergency measures are taken conveniently, so that the serious fault occurrence of burning the secondary exciter is avoided.

The invention relates to an ultraviolet light catalyzed waste water degradation reactor dilation method for self inspection of lamp source states and belongs to the technical field of waste water treatment. Problems that functions and states of electrodeless lamps cannot be known instantly, cavities of quartz tubes for shielding the electrodeless lamps have water burst, catalyst can be lost, microwave energy is wasted, capacity of single tanks is small, degradation reaction endpoint time is difficult to tell and the like exist in the prior art. The ultraviolet light catalyzed waste water degradation reactor dilation method is used for solving the problems and comprises: guiding one end of an optical fiber to the periphery of a quartz tube, enabling the end of the optical fiber to point to the inner cavity of the quartz tube, enabling the other end of the optical fiber to adhere to and point to a detection window of an ultraviolet light strength detector. The ultraviolet light catalyzed waste water degradation reactor dilation method further comprises other steps and totally solves all relevant problems.

The invention relates to a health state evaluation method, system and device for a numerical control machine tool and a medium, and the method comprises the steps: training model parameters of a health state analysis model based on each pre-obtained training sample data set, and calculating a corresponding likelihood probability, forming a preset model parameter set representing different preset working condition states of the machine tool by each group of trained model parameters, and forming a preset likelihood probability set by each likelihood probability; and based on the obtained preset model parameter set and the preset likelihood probability set, evaluating the health state of the current numerical control machine tool. According to the method, the historical monitoring data of the numerical control machine tool is utilized to construct the multi-dimensional data vector, the health state of the numerical control machine tool is evaluated by calculating the health degree, the number of machine tool sensors does not need to be increased, the model has wider practicability, the calculation complexity is reduced, and accurate, rapid and real-time health degree evaluation is achieved; the method can be widely applied to the numerical control machine tool health state monitoring field.

The invention belongs to the technical field of aero-engine fault diagnosis, and relates to an aero-engine blade damage online identification method. Comprising the following steps: establishing a damage-free blade finite element model, and calculating modal frequency and vibration mode of each order; establishing a non-damage blade test model, and identifying test modal frequency and vibration mode; taking the previous 10-order test modal frequency as a target value, taking the blade material parameter as a variable, correcting the blade finite element model, obtaining an accurate finite element model, and calculating a stiffness matrix of each element, where the unit stiffness matrix is assembled into an overall vibration mode stiffness matrix; measuring blade vibration parameters in a working state; reading vibration parameters and rotating speed parameters in real time through an online monitoring system, correcting the finite element model to complete damage positioning, calculating the modal strain energy change rate to complete damage evaluation, and displaying an alarm when the damage amount exceeds the limit. The blade damage position and the damage degree can be determined online to complete feedback, serious faults are prevented, the repair cost is reduced, and the flight safety is guaranteed.

The invention relates to a lamp source state self-inspection ultraviolet catalytic wastewater degradation reactor expansion method, belonging to the technical field of wastewater treatment. The existing related background technique has the problems of difficulty in instantly knowing the functional state of the electrodeless lamp easily, magnetron corrosion by water invasion and ozone inversion cross flow in the quartz tube cavity for electrodeless lamp shielding, incapability of well utilizing electrical charge characteristics of the catalyst, and the like. The invention aims to solve the problems. The method mainly comprises the following steps: introducing one end of an optical fiber to the periphery of the quartz tube so that the tip of the optical fiber points to the inner cavity of the quartz tube; enabling the other end of the optical fiber to be close to and point to a detection window of an ultraviolet intensity detection instrument; continuously supplying air to the quartz tube cavity region with a minitype air pump to counteract air leakage due to various regions, and keeping the positive pressure state of the air in the region to prevent water invasion accidents; hermetically isolating a waveguide tube with a microwave-permeable material to prevent the ozone inversion cross flow; and finely intercepting the catalyst particles with a plurality of cascade-connected negatively-charged filter membranes, and the like.

The invention relates to an air cylinder cover suitable for a supercharged and intercooled structure engine. The air cylinder cover comprises an air cylinder cover body. An air inlet valve seat is arranged at the part, corresponding to an air inlet valve, of the bottom of the air cylinder cover body; an air exhaust valve seat is arranged at the part, corresponding to an air exhaust valve, of the bottom of the air cylinder cover body; a cooling water sleeve is arranged inside the air cylinder cover body; a plurality of cooling water holes are formed in the air cylinder cover body; each cooling water hole communicates with the interior of the cooling water sleeve to form a cooling water circulating channel; a cavitation erosion preventing casing arranged on the air exhaust valve seat in a sleeving mode is further arranged at the bottom of the air cylinder cover body; a cooling water cavity is formed between the cavitation erosion preventing casing and the air exhaust valve seat; and through holes with one ends communicating with the cooling water cavity and the other ends communicating with the cooling water circulating channels are formed in the cavitation erosion preventing casing. The influence of cavitation erosion on the air cylinder cover can be relieved, and the service life of the air cylinder cover is prolonged substantially.

The invention provides a method and system for automatically controlling synchronous action of filter plates of a filter press. The method comprises the steps that: pressure data at two sides of eachfilter plate suspension rod and limiting switch state data at two sides of each filter plate arecollected when it is recognized thatthe filter press has a plate closing/opening action instruction; anoil pump of a filter pressing system and related valves for plate closing/opening are controlled according to a real-time plate closing pressure monitoring value and a pressing pressure monitoring value, and the plurality of filter plates of the filter press are automatically controlled to synchronously realize the plate opening/closing action according to set plate closing/opening requirements. By the means of the technical schemes of the invention, the automatic synchronous control over all the filter plates of the filter press in the plate closing and opening operation process can be achieved, operation data of all structures are collected in multiple directions to serve as the basis of real-time control, timely response can be achieved when fault hidden dangers exist or faults just happen, the fault removal efficiency is guaranteed, time and material resource losses of fault expansion are avoided, and the intelligence of synchronous control of the multiple filter plates of the filter press is improved.

The invention discloses a water guide shoe temperature trend early warning method, device and system based on machine learning. The method comprises steps of obtaining a water guide shoe temperature prediction model which is obtained based on machine learning training and comprises the water guide shoe temperature sum, an input factor and the relation between the water guide shoe temperature sum and the input factor; publishing the water guide shoe temperature prediction model as a temperature prediction service; wherein the temperature prediction service responds to a temperature prediction request sent by the early warning application module and a real-time sampling value of an input factor, calculates a prediction temperature, and sends the prediction temperature to the early warning application module, so the early warning application module compares the prediction temperature with an actual sampling temperature according to a predefined warning rule, and sends the actual samplingtemperature to the early warning application module; and determining whether to issue an alarm. The method can scientifically and effectively predict the temperature of the water guide shoe of the hydroelectric generating set, gives out related early warning in advance, avoids severe faults of the hydroelectric generating set, and greatly improves operation reliability of the hydroelectric generating set.

The invention discloses a main transformer oil conservator state prediction method and device based on digital twinning and electronic equipment. The method comprises the following steps: establishing a digital twinning main transformer oil conservator model; establishing a target variable prediction model, a quantifiable influence factor prediction model and a total influence factor prediction model; running the digital twin main transformer oil conservator model, and acquiring detection data; respectively inputting the detection data into the target variable prediction model, the quantifiable influence factor prediction model and the total influence factor prediction model, and respectively obtaining a first oil temperature prediction trend line, a second oil temperature prediction trend line and a third oil temperature prediction trend line; and according to the first oil temperature prediction trend line, the second oil temperature prediction trend line and the third oil temperature prediction trend line, conducting state prediction of the main transformer oil conservator. According to the method, the future health state of the main transformer oil conservator can be effectively predicted and analyzed, and a solution is provided for reliable operation of equipment.