162results about How to "Eliminate hidden dangers of failure" patented technology

The invention discloses a distribution network fault prediction method and system based on big data, and belongs to the technical field of power network safety maintenance. The method comprises the following steps of: S1, acquiring original data, S2, processing the original data by using Tableau software so as to obtain analyzable sample data, wherein the processing comprises data cleaning, data transformation and data integration; S3, analyzing the correlation of the fault influencing factors of the distribution network; S4, building a fault prediction model based on an improved random forestalgorithm; wherein the improved random forest algorithm generates a plurality of classification trees which are combined through modes of voting or arithmetic mean decision. The method achieves the fault prediction of the local distribution network line. And fault early warning information is timely issued to provide targeted line operation and maintenance guidance for power distribution networkoperation and maintenance departments. The hidden trouble of line failure is eliminated in advance, the failure rate of the distribution network is reduced, and the power supply reliability of the distribution network is improved.

The invention provides a power cable real-time state monitoring and operation management system and a measuring method of the temperature of a cable. The power cable real-time state monitoring and operation management system comprises a distributed Raman temperature measurement sensing unit, a data acquisition subunit, an optical magnetic field sensing unit, a current data demodulator, an FPGA core processing subunit, an ARM core processing subunit, a magnetic field sensing head and an operation management server, wherein a temperature demodulator of the distributed Raman temperature measurement sensing unit and the current data demodulator of the optical magnetic field sensing unit are connected with the operation management server through Ethernet interfaces, an optical filter carries out band-pass filtering processing on Stokes light and Anti-Stokes light, light intensity signals of filtered back Raman scattering light are converted into electric signals through a photoelectric detection unit, the electric signals are amplified to obtain voltage signals corresponding to the temperature, the data acquisition subunit carries out A/D conversion on the voltage signals, an actual temperature value is obtained through calculation, the hidden danger of faults, with unobvious surface temperature rise, of the cable is eliminated, real-time fault recording is carried out on important cable taps, rapid contact locating of the hidden danger of the faults and accident analysis are facilitated, and real-time calculation of the current-carrying capacity is achieved.

The invention discloses a device for testing the characteristics of breaker opening and closing coils. The device comprises a controller, a coil resistance testing unit and a coil insulation and number-of-turns testing unit. The controller is respectively connected with a signal source, the coil resistance testing unit and the coil insulation and number-of-turns testing unit, the coil resistance testing unit and the coil insulation and number-of-turns testing unit perform testing through a coil to be tested, tested data are sent to the controller, the controller performs fault diagnosis on the breaker opening and closing coils in real time, and therefore real-time monitoring of the breaker opening and closing coils is realized. According to the device, the performance and the quality of the coils are estimated through testing of the characteristics of the coils, quality defects and fault hidden dangers are eliminated, the reliability and the stability of products in use are guaranteed, and the operation safety of a power system is improved.

The invention discloses a submersible pump simulation produce method which has steps as follow: (1) process hydraulic design accord to design parameters; (2) establish three-dimensional digital product model based on fractional steps cooperative design platform; (3) supply three-dimensional digital product model by product data management platform to simulation tools in several fields process virtual simulation; (4) process product structure, performance analysis prediction to simulation virtual prototype on synergistic simulation platform; (5) production of prototype. The invention also discloses a submersible pump simulation produce system which contains fractional steps cooperative design platform, cooperative simulation platform and product data management platform which execute data exchange between fractional steps cooperative design platform and cooperative simulation platform. The invention can effective shorten the development cycle and development cost, and realize the optimization design of product.

The invention discloses a power grid equipment fault identification method and system. The method comprises the following steps: collecting large-class equipment data of power grid equipment; Whereinthe large-class equipment data comprises an operation state, an equipment standing book, historical faults, equipment defects, equipment overhaul, an equipment environment and equipment safety; classifying the large-class equipment data into a plurality of small-class equipment data through a naive Bayes machine learning model; counting the number of faults of each subclass equipment data in a preset time range; and according to the fault number, predicting the number of faults to be generated by the equipment in the future time through a time sequence prediction model. According to the methodor the system, the fault occurrence of the power grid equipment can be predicted, countermeasures are taken in advance, and the fault occurrence is avoided.

The invention relates to a remote-control system and control method for a 4D cinema. The control terminal of the remote-control system transmits a directive command aiming at terminal equipment to a central control main machine; the central control main machine analyzes the directive command and transmits one or more control commands which correspond to the directive command to terminal equipment appointed by the directive command; and the terminal equipment which receives one or more control commands executes the control commands and feeds back the executive information of one or more control commands to the central control main machine. The remote-control system disclosed by the invention has the beneficial effects that the inaccuracy of open-loop control is improved because the terminal equipment executes accurate information feedback on the control commands every time, thereby achieving the WYSIWYG (What You See Is What You Get) effect; and the using conditions of the terminal equipment and the parts thereof are fed back through feedback information, the statistic operation time and the status information in the executing process are transmitted to the central control main machine, and the replacement time of the terminal equipment or the parts thereof is defined one by one, so that the fault hidden trouble is previously eliminated and the operating cost is lowered.

Disclosed in the invention is a fault monitoring system for a power transmission line. The fault monitoring system comprises a transmission line signal collecting device and a monitoring center. The transmission line signal collecting device consists of a temperature sensor, a hall sensor, a fault indicator light, a microcontroller, a GPS positioning module, and a data transmission module; the microcontroller receives fault signals sent by the temperature sensor and the hall sensor; a line fault position is obtained by the GPS positioning module; and the data transmission module sends the fault signals and the line fault position to the monitoring center. After a fault occurs within a few minutes, a fault position can be provided and then the fault point information is sent to the monitoring center, so that the maintenance staff can go to the field rapidly and thus a potential failure can be eliminated. Therefore, reliable and effective data can be provided for the operation staff and the maintenance staff to carry out operation and maintenance, fault analyses, and line repairing, thereby substantially improving the operation reliability of the power transmission line.

The invention discloses an automatic guided vehicle maintenance and repair prompt guiding device, belonging to the technical field of the automatic guided vehicle maintenance and repair. The device comprises an embedded computer, a mileage signal collector, an electrical machine vibrating machine, a power battery output current and temperature sensor, a signal conditioning circuit, an information storage circuit, a storage card, a liquid crystal display circuit, a power circuit, a system clock circuit, an information transmission circuit, a keyboard, a vehicle-mounted sound-light alarm circuit and a wireless alarm circuit; the device can dispose through the fusion algorithm of the multi-sensors information according to the travel distance of the automatic guided vehicle, the accumulated working time of a driving electrical machine and the output current and the real-time temperature of the power battery, sends a message to the dispatching center by the vehicle-mounted alarm device or the wireless network and automatically prompts and guides a user to maintain and repair the automatic guided vehicle, eliminates the accident hidden trouble, ensures the reliability and safety of the automatic guided vehicle using and prolongs the service life of the automatic guided vehicle.

The invention discloses a power capacitor bank with a capacity monitoring function. The power capacitor bank comprises a plurality of power capacitors and a main control processing unit, wherein the power capacitors are connected with a voltage and current detection unit. The voltage and current detection unit comprises a signal collection module, a sampling processing module and a radio frequency sending module. The main control processing unit comprises a radio frequency receiving module, a data processing module and a display module. By means of real-time monitoring of short-term change characteristics and long-term change trends of capacity of each power capacitor, work conditions and failure phenomena of each power capacitor can be effectively diagnosed, so that effective measures can be taken in advance to remove hidden failure risks and serious accidents caused by spreading of failures are avoided. Additionally, a wireless radio frequency data transmission mode is adopted, direct electric connection between a high voltage side and a low voltage side is avoided, and good high voltage isolation functions and practical use values are achieved.

The invention discloses a feature extraction method of a hydraulic reciprocating seal damage state. By use of the method which is put forward by the invention, a fiber bragg grating strain sensor, a fluid pressure sensor and the movement placement sensor of an execution component are mainly used for independently collecting the strain signal of a reciprocating seal bottom surface, the pressure signal of a system and the movement signal of the execution component in a working process of the hydraulic execution component, and the extraction of hydraulic reciprocating seal damage state features is realized through the effective fusion of various pieces of sensing information so as to realize the fault prevention and the health management of the system.

The invention relates to a method for preventing a monomer from being polymerized in a storage tank, and particularly relates to a method for preventing a vinyl monomer from being polymerized in the storage tank. The method comprises the following step of brushing a coating on the inner wall of the vinyl monomer storage tank, wherein the coating comprises a bottom layer, an intermediate layer and a surface layer, the bottom layer and the surface layer are coatings which contain no polymerization inhibitor, the intermediate layer is a coating which contains the polymerization inhibitor, and the intermediate layer is prepared according to the following steps of (1) adding the polymerization inhibitor to a solvent for dissolution; (2) adding a solution obtained from the step (1) to the base material of a coating material, and stirring for mixing; (3) adding an auxiliary material solidifying agent to the base material which contains the polymerization inhibitor, stirring for mixing, and then brushing. The method disclosed by the invention solves the problem that the coating is reduced in adhesive force and short in polymerization inhibition period after the polymerization inhibitor is added in the prior art by changing the addition method of the polymerization inhibitor, effectively prevents the vinyl monomer from being polymerized in the storage tank and prolongs the tank cleaning period of the storage tank.

A disc array system is prepared as forming power supply bus by setting power supply module on back plate, connecting power supply bus to power supply circuit for supplying power onto disc, arranging power supply protection unit on power supply circuit and using said unit to switch off power supply circuit when switching off signal is detected out by said unit. The power supply protection unit applying said disc array system is also disclosed.

The invention discloses an insulation state evaluation method for a power distribution line. The method comprises the following steps that: firstly, according to internal, external and non-positioningfault information and a power distribution line operation situation, establishing an insulation state evaluation model for the power distribution line; then, when an insulation fault happens, according to the wave recording data of each monitoring point, determining the value of the insulation state evaluation index of the power distribution line; and finally, according to the value of the insulation state evaluation index of the power distribution line, utilizing the insulation state evaluation model for the power distribution line to evaluate the insulation state of each section of the power distribution line. Through the method, the accuracy and the reliability of insulation state evaluation for the power distribution line can be improved, an alarm signal can be given when the insulation state is lowered to a certain degree, the insulation state of the power distribution line can be obtained in time so as to provide a basis for line state overhauling, and therefore, the reliabilityof the power distribution line is improved.

A three-freedom-degree transmission mechanism comprises a helical pair, a revolute pair and a cylindrical pair. The axis of the helical pair is perpendicular to the axis of the revolute pair, and the axis of the revolute pair is parallel to the axis of the cylindrical pair. The revolute pair comprises a support (7), a movable sliding block (5), the helical pair (3), a nut (4), a left limiting block (1) and a right limiting block (6). The left limiting block (1) and the right limiting block (6) are fixedly arranged on the support (7), and the helical pair (3) is provided with the movable sliding block (5). The transmission mechanism is characterized in that the helical pair (3) mounted on the support (7) and the revolute pair can form 0-degree to 180-degree intersection angles through the movable sliding block (5). According to the transmission mechanism, under the condition of identical number of rotation of a screw rod, the speed of the straight line motion (opening and closing) of the nut (a door leaf) is improved. The mechanical locking of a vehicle door is achieved without another set of mechanical locking mechanism. The transmission mechanism is simple, the motion procedures of unlocking and locking are removed, procedure control is simplified, and two fault hazards are eliminated.

The present invention relates to a method for well cementing assisted by grout inflatable external packer. Grout replacing of slop or water to inflatable packed external packer eliminates the hidden trouble of packer invalidation, which is equal to make a permanence firmly clapboard among layers. So the well cementing assisted by grout inflatable external packer is realized based on matching grout inflatable external packer assistant well cementing tools. The present invention realizes the technique of well cementing assisted by grout inflatable external packer, provides new efficient technique measure for interlayer expansion cement of breakthrough prevention of multilayer complex oil reservoir: using grout filling external packer can separate different pressure layer, and water, gas and oil layers, resolve problems of interlayer disturbing and breakthrough after well cementing efficiently. Also, using grout filling external packer can form permanence envelop to protect oil gas layer which is benefit for production and operation.

The invention is applicable to the technical field of unmanned aerial vehicles (UAV), and provides a state evaluation method and apparatus for UAVs. The method includes the steps of establishing a UVA state evaluation index model, grading UVA state evaluation indexes, establishing a fuzzy determination matrix according to state evaluation indexes of each level, obtaining the constant weight of each state evaluation index according to the fuzzy determination matrix, calculating the grade of membership of each state evaluation index according to a state evaluation index membership grade model, dynamically adjusting the constant weight of each state evaluation index according to the relation between the constant weight and the membership grade of each state evaluation index and corresponding threshold, and determining the UVA state evaluation value according to the membership grade and the variable weight of each state evaluation index. The solving process using weight is more objective, the obtained evaluation result is more practical, and the weight proportionality of each index is more obvious, and actual situation can be objectively reflected.

The invention discloses a three-linkage synthesis core-pulling device of an injection mould. The three-linkage synthesis core-pulling device comprises a big sliding block (1), a small sliding block (2), a lower sliding block (3), a separation and reunion pin (4) and an oil cylinder (5), wherein the big sliding block is provided with a pipe cavity, a small sliding groove and a pin groove; the small sliding block is provided with a pipe core, an inclined sliding rail and an upper separation and reunion groove, and the inclined sliding rail is provided with a limiting step; the lower sliding block is provided with a limiting rod; a movable mould support plate is provided with a lower separation and reunion groove; the big sliding block is arranged on the movable mould support plate in a sliding way; the small sliding block is arranged in the small sliding groove in a sliding way; a cylinder body of the oil cylinder is fixedly connected with the movable mould support plate; a piston rod of the oil cylinder is fixedly connected with the small sliding block; the separation and reunion pin is arranged in the pin groove of the big sliding block; when the mould is closed, the lower end of the separation and reunion pin is clamped in the lower separation and reunion groove; when the mould works, the small sliding block is driven by the oil cylinder to enable core-puling to be firstly carried out on the pipe core and the lower sliding block; when the separation and reunion pin is inserted into the upper separation and reunion groove, the big sliding block is connected with the small sliding block, so that core-pulling is carried out on the pipe cavity; therefore, injection mould provided with a plurality of pulling cores at the narrow position achieves the aims of simplifying the structure, reducing the body form, lowering the cost and eliminating failure.

The invention belongs to the technical field of high-voltage electric appliance protection and particularly to a high-voltage insulator online monitoring system and method. The monitoring system comprises monitoring devices and a remote data center; each monitoring device comprises a data collection module, a GPS positioning module, a control module and a GSM communication module; the remote datacenter comprises a data reception unit and a console; and the console comprises a controller, a memory and a display device and is stalled with a parallel computing system. The control method of the monitoring system comprises the steps of 1) sending state information and position information of each insulator to the remote data center by each monitoring device; 2) storing and displaying the stateinformation and the position information of each insulator by the remote data center; 3) obtaining filth degree information and crack degree information on the surface of each insulator by the remotedata center through the parallel computing system to serve as a computing result and obtaining and displaying an alarm notification based on the computing result.