384results about How to "Improve safe operation" patented technology

The invention discloses a cooperative control method for variable lanes of a city artery, mainly relates to a cooperative method for variable lanes from flat hump to peak and aims to fully utilize indication lights of variable lanes and coil detectors arranged on the variable lanes to cooperate signal timing of each intersection, give play to signal control technology to the maximum limit, smoothly complete direction conversion of the variable lanes , increase road safety operation condition of the variable lanes and establish the cooperative control method for the variable lanes of the city artery. The cooperative control method specifically includes improving signal timing of each intersection through which each variable lane passes; cooperating signal timing of all the intersection through which the variable lanes pass; and converting direction of the variable lanes of the city artery.

The invention provides an intelligent on-line monitoring system and method of a high-voltage switchgear. The intelligent on-line monitoring system comprises a partial discharge on-line monitoring system, a switchgear temperature measurement system, an intelligent data exchange terminal, a comprehensive monitoring system, a cloud platform diagnostic service system and a background management system. The partial discharge on-line monitoring system is used for monitoring the partial discharge activity of the high-voltage switchgear; the switchgear temperature measurement system is used for collecting temperature parameters of the high-voltage switchgear; the intelligent data exchange terminal can obtain intelligent sensor data in real time; the comprehensive monitoring system selectively anddeeply analyzes the equipment exception causes, finds out equipment failure points, and uploads data and diagnostic results to the cloud platform expert diagnostic system; the cloud platform diagnostic service system is used for comprehensively analyzing the operation state of the equipment by utilizing data uploaded by the intelligent data exchange terminal and data uploaded by the movable comprehensive monitoring system, and evaluating the partial discharge condition of the switchgear by combining with a failure case library; and the background management system logs in according to different user rights, and can use different functions according to the rights, and the system has the main functions of being responsible for data management, statistics and analysis, and classified storageof monitoring data. Interaction between operation and maintenance personnel and equipment management can be achieved, and the practical significance for guaranteeing safe operation of the high-voltageswitchgear is achieved.

The invention discloses a NanoSat satellite house-keeping health management system based on a Bayes network model. The system includes a whole satellite level health management system, sub-system level health management modules, and part level health management units. The whole satellite level health management system is intended for conducting health evaluation and fault recovery on the whole satellite electronic system. Each sub-system level management module is intended for monitoring, diagnosing and evaluating each sub-system and constituting a comparatively independent sub-system level diagnosis evaluation module. Each part level health management unit is intended for processing and transmitting data acquired by a part or a sensor; the whole satellite level management system is connected to a plurality of sub-system level health management modules which are connected to a plurality of part level health management unit. According to the invention, the system establishes a hierarchical and distributed satellite house-keeping health management system architecture, can realize automatic management function of a satellite, and prolongs service life and safe operation of the satellite.

The invention discloses an elastic supporting device vibration strain monitoring method. A supporting body of an elastic supporting device comprises a bearing pedestal and a plurality of elastic cage strips which are distributed in the circumferential direction of the bearing pedestal, wherein one end of each elastic cage strip outwards extends in the radial direction of the supporting body to form an installation edge, and a gap is formed between the circumferential outer wall of the bearing pedestal and a machine box and filled with lubricating oil so as to form an extruded oil film damper. The method includes the steps that a strain gauge is attached to at least one elastic cage strip and connected to a vibration strain measuring instrument outside the machine box through a lead, and the vibration strain value of the strain gauge is detected through the vibration strain measuring instrument; whether the detected vibration strain value is larger than the preset vibration strain alarm threshold value or not is judged, and an alarm signal is generated if yes. By detecting the vibration strain value of the strain gauge, the vibration strain of the elastic supporting device is accurately detected, it is ensured that a journal of the bearing pedestal works within an extruded oil film linear area, an alarm is given once the vibration strain value exceeds the threshold value, and safe running performance of a rotor is improved.

The invention discloses a high-speed electric multiple unit axle box bearing three-degree-of-freedom dynamic load reliability test platform and aims to overcome a problem that an axle box bearing reliability test can be not carried out in a practical operation. The test platform comprises a torque detection testing device and an axle box bearing reliability test device. The torque detection testing device is connected with the axle box bearing reliability test device through a cross shaft type universal shaft coupler. The axle box bearing reliability test device comprises a simulated frame side beam test device, a three-degree-of-freedom vibration simulation test device and a shaft assembly for an axle box bearing test. The three-degree-of-freedom vibration simulation test device comprises a vibration T type beam and a lateral actuator. The shaft assembly for the axle box bearing test is fixed on the vibration T type beam through bolts. The simulated frame side beam test device and the three-degree-of-freedom vibration simulation test device are placed in a parallel way. The parallel distance of the vibration T type beam in the three-degree-of-freedom vibration simulation test device and a simulated frame side beam supporting platform in the simulated frame side beam test device is 20 mm to 40 mm.

The invention discloses transformer oil with excellent cooling heat-radiating and moisture preventing properties. The transformer oil is mainly prepared from the following raw materials: hydrogenated stock oil, naphthene thickened oil, an antioxidant and a metal passivator, wherein the ratio of the hydrogenated stock oil to the naphthene thickened oil is (72-82):(18-28) in terms of parts by weight, the amount of the used antioxidant accounts for 0.3-0.5% relative to the total mass of the hydrogenated stock oil and the naphthene thickened oil, and the amount of the used metal pasivator accounts for 0.1-0.2% relative to the total mass of the hydrogenated stock oil and the naphthene thickened oil. The invention further discloses a preparation method of the transformer oil. The transformer oil has excellent cooling heat-radiating and moisture preventing properties, thus being very suitable for being used in southern areas of China.

The present invention provides a generic technique to perform access control check for data access and/or for doing an operation in a COM based system comprised of multiple servers and having multiple users. A unique user security context number is generated after validating the user for a session, based on user entered authentication parameters. The generation of the security context numbers and the fetching of the access control information from storage medium is managed by a central security server. The generated unique user security context number is then used throughout the session to check for access permission for data access and/or to perform an operation requested by the user during the session.

The invention relates to the field of motor fault diagnosis, and discloses a motor fault diagnosis method and system, which can find abnormal conditions of motor operation in time and perform fault diagnosis, and is convenient to use and easy to implement. The method comprises the following steps of selecting a normal training data set, calculating a first detection statistic, and calculating a detection threshold; selecting different types of fault data as a fault training data set, calculating a second detection statistic, calculating a fault probability density function of the second detection statistic by adopting a kernel density estimation method, and constructing a probability density function set of all types of fault samples; selecting a test data set, calculating a third detection statistic according to the test data set, comparing the third detection statistic with a detection threshold, and judging whether the motor has a fault or not; and if a fault occurs, calculating a fault density function of the third detection statistics by adopting a kernel density estimation method, and constructing a probability density function set of the test data set so as to diagnose the fault type.

The invention provides a suction type SF6 gas leakage monitoring device and method. The device comprises an air outlet (1), an air inlet (2), an infrared light supply (3), a window piece I (4), a window piece II (5), a reference spectral filter (6), a measuring spectral filter (7), a dual channel infrared detector (8), a temperature probe(9), a signal conditioning module (10), an A/D (Analog/Digital) conversion module (11), a data processing module (12), a light source driving module (13), a device body (14), an end cover I (15) and an end cover II (16). The invention provides the suction type SF6 gas leakage monitoring device and method have the advantages that the suction type SF6 gas leakage monitoring device has a digital output and thermal compensation function and is simple and reliable, and the sensitivity is high. The method and the device can carry out ration monitoring on SF6 leaking so as to externally output a high-precision SF6 leaking concentration value, and the method and the device have the advantages that the monitoring accuracy is high, the method and the device are stable and reliable, the structure is compact, the volume is small and exquisite and the like.

The invention relates to a method for simultaneously determining various metal elements in transformer oil. An analyzing sample of the transformer oil of the invention is weighed quantificationally after a collected oil sample is heated and stirred uniformly; an infrared heating method is adopted for carrying out vaporizing and carbonizing at constant temperature on the analyzing sample of the quantificational transformer oil, a box type high temperature furnace is adopted for carrying out high temperature cineration on the carbonized sample, acid liquid is adopted for carrying out dissolving on the incinerated sample under the lower temperature heating condition, a soluzione leggermente acida is adopted for carrying out diluting and volume fixing on the dissolved sample to be prepared into analyzing liquid. The analyzing liquid accurately determines the content of various metal elements by using a complete spectrum direct reading plasma emission spectrum apparatus. The method of the invention can determine a plurality of elements and has high accuracy, can determine oil mediums with different varieties and content ranges, being capable of accurately showing the change current of the metals in the oil mediums and being convenient for accurately analyzing and finding out hidden troubles in time.

The invention discloses a bending plate type tire device. The bending plate type tire device comprises a wheel rim, wherein a plurality sets of supporting pieces which are continuously bended are fixed on the circumference annular surface of the wheel rim through fastening pieces; a band lining is arranged on the outer parts of the supporting pieces in a padding manner, and is wrapped with a packing piece, or an inflatable cover tire is arranged on the outer part of each of the supporting pieces; the longitudinal section of each supporting piece is in a flat S shape, and each supporting piece is divided into a mounting section, a neck bend, a straight section, a shoulder bend, a working section and a tail section, wherein a tail inserting groove is formed in the surface of the tail end of the working section, and is circular; a jointed part of the tail inserting groove and the tail section of each supporting piece forms a triangular space; a plurality of bosses radially facing outwards are arranged at the position, close to the tail section, of the tail inserting groove. According to the bending plate type tire disclosed by the invention, compared with the prior art, one or more sets of plate-shaped elastic supporting pieces which are mutually connected and continuously bended are mounted on the wheel rim, so that the functions of elastically supporting a wheel load, driving and braking are realized, and the requirement that a vehicle can durably and safely operate in multiple complex and harsh environment is met.

The invention discloses a control system and a method thereof for realizing uniform pulverized coal distribution for a direct firing pulverizing system. The method comprises the following steps: measuring in real time to obtain pulverized coal flow rate and pulverized coal concentration in each pulverized coal conveying pipe; according to an equation that pulverized coal mass flow rate is equal to the pulverized coal concentration multiplied by the pulverized coal flow rate multiplied by the cross section area of each pulverized coal conveying pipe, calculating to obtain the pulverized coal mass flow rate in each pulverized coal conveying pipe; adjusting the openness of a throttling valve in each pulverized coal conveying pipe, so that the pulverized coal flow rate deviation among each group of pulverized coal conveying pipes is smaller than plus or minus 5 percent; adjusting the angle of a pulverized coal concentration adjusting plate in each coal mill pulverized coal distributor, so that the pulverized coal mass flow rate among the pulverized coal conveying pipes is smaller than plus or minus 10 percent. By adopting the control system and method, direct on-line monitoring on the pulverized coal concentration and the pulverized coal flow rate is realized, so that the pulverized coal concentration and the pulverized coal flow rate are both controlled to be within effective deviation ranges, and thus the effect of uniform pulverized coal distribution for the direct firing pulverizing system is realized.

The invention discloses a machine vision-based method and device for online detecting multi-rope multi-layer wound rope guiding states. The method comprises the following steps of: setting an industrial camera at each rope guiding area; carrying out inter-frame template image matching on an acquired image sequence; obtaining a final target tracking frame; automatically tracking the rope guiding state by utilizing judgement carried out on position information of the target tracking frame; and when transition among a plurality of ropes is out of sync or a single rope guiding area has a rope disorder fault, carrying out real-time detection and giving alarm information. According to the method and device, the condition that a single rope is highly stressed as the transition is out of sync or abrasion of steel wire ropes is increased due to rope disorder is avoided, and benefit is brought to ensure the safe operation of ultra-deep well enhancing equipment and decrease the economic loss.

The invention relates to a rail vehicle grounding drainage test apparatus, and more specifically relates to a rail vehicle shaft end grounding apparatus wear test bench. The test bench comprises a test equipment assembling body, a heat dissipation fan assembling body and a test apparatus protective cover assembling body, wherein the test apparatus protective cover assembling body is fixed above the test equipment assembling body; the heat dissipation fan assembling body is fixed above the test apparatus protective cover assembling body, the test equipment assembling body comprises two symmetrically arranged test shaft assembly and bearing pedestal assembling bodies and a motor and motor support column assembling body; and the motor and motor support column assembling body and the two test shaft assembly and bearing pedestal assembling bodies are respectively in transmission connection through driving belt assemblies. Through a double-test-shaft transmission test apparatus provided by the invention, the rotating speed and the current working condition of a motor train unit in an actual track can be accurately simulated, a quite good test foundation is provided for a loss test of a rail vehicle shaft end grounding apparatus, and the accuracy of test data is guaranteed.

The invention discloses a state detection and protection method for a circuit breaker opening and closing coil. The invention provides a state detection and protection system for a circuit breaker opening and closing coil, deduces a coil equivalent heating formula through theoretical calculation and coil opening and closing material analysis, and achieves the purpose of protecting the coil by cutting off the electrified loop before the coil reaches a heat melting point through the calculation of heat productivity. IGBT power electronic components are easy to damage after long-term operation, the service life of an IGBT is prolonged by combining with a relay, and the purpose of performing reliable operation and cutting off a loop reliably can be achieved; a theoretical basis is provided for the circuit breaker maintenance; the safe reliability of the circuit breaker opening and closing coil is improved; the safe operation capability of a transformer substation can be effectively improved, the field maintenance workload can be effectively reduced, and the economic benefit is remarkable; and the state detection and protection method guarantees the safe and economical operation of the transformer substation system, and improves the power supply reliability of the transformer substation.

The invention discloses a cable well cover board capable of realizing intelligent monitoring, which comprises a cable well seat fixed on a ground, a cable well cover fixed on the cable well seat in a rotary mode, a monitoring device arranged below the cable well seat and a connection shaft connected between the cable well seat and the cable well cover, wherein the monitoring device comprises a sensor module, a microprocessor connected with the sensor module, a CT power taking module providing power for the microprocessor and measuring the working voltage, a communication interface connected with the microprocessor, a GSM module connected with the communication interface and a wireless transmitting and receiving module connected with the communication interface. According to the cable well cover board capable of realizing intelligent monitoring provided by the invention, the state of the cable well cover can be monitored in real time, the cable well cover board can be locked automatically when a theft risk is found out, the water level, the smoke, the temperature and the high-voltage cable metal protection layer grounding point current value can be monitored at the same time, early warning is given if the values exceed a safety range, all possible power grid dangers can be avoided, and the safety operation degree of the power grid is improved.

The present invention relates to a high-speed wheel-rail relation reliability test bed. The high-speed wheel-rail relation reliability test bed comprises a rail wheel motion device and a power truck simulation loading framework, wherein two unilateral shafts of the rail wheel are respectively connected with number 1 roller linkage transmission shaft assembly body and a number 3 roller linkage transmission shaft assembly body; the power truck simulation loading framework includes a counter-force square tube beam frame vibration excitation device, a bearing frame-type support assembly body, a number 1 counter-force base fixed device and a number 2 counter-force base fixed device; the counter-force square tube beam frame vibration excitation device, the number 1 counter-force base fixed device and the number 2 counter-force base fixed device are respectively fixedly connected with globe joint bearing block assembly bodies of the numbers 1-3, the loading framework side beams of the side beam clamping plate assembly bodies of the numbers 1-2; and the outer sides of a number 5 spherical guide strip and a number 6 spherical guide strip are fixedly connected at the inner side of the number 1 bearding frame-type support. According to the invention, the problem is solved that a train is difficult to perform the wheel rail relation reliability test in the process of actual operation in the prior art, and the requirement of the reliability parameter detection of a rail vehicle wheel in a plurality of operation conditions is satisfied.

The invention relates to a safety and stability analysis method for a power grid. The method comprises steps as follows: sensitivity calculation, risk result analysis, risk prevention and control and risk rating. The safety and stability analysis method has the advantages as follows: with adoption of the analysis method, all sets of failure equipment are sequenced through sensitivity calculation, a risk value of each risk source is given out, risk prevention and control are performed, the risk grade is given out according to regulations, and an important basis is provided for safety and stability analysis of the regional power grid; compared with a conventional analysis method, the analysis result is good, risks of the power grid can be well analyzed and assessed, risk rating by an operator and operation overhaul by the operator are facilitated, and the safety operation of the power grid is improved.

The invention provides a comprehensive monitoring and diagnosis system and method of state information of a mobile transformer. The comprehensive monitoring and diagnosis system of state information of a mobile transformer includes an intelligent wireless sensor which is used for collecting quantity of state of the transformer, an intelligent data exchange terminal which can obtain the data of theintelligent sensor in real time, a comprehensive monitoring system which selectively and deeply analyzes the reasons for equipment anomalies and searches equipment failure points and uploads the dataand the diagnostic result to a cloud platform expert diagnosis system, a cloud platform diagnosis service system which utilizes the intelligent data exchange terminal to movingly and comprehensivelymonitor the data uploaded by the equipment and comprehensively analyze operation state of the equipment, and evaluates the health of the transformer by combining failure case library so as to make anoverhauling strategy, and a background management system which logs in according to different user rights and can use different functions according to the rights, wherein the main function of the system is responsible for data management, data statistics, data analysis, and classified storage of monitoring data. The comprehensive monitoring and diagnosis system of state information of a mobile transformer can realize interaction between operation and maintenance staff and equipment management, and has practical significance for improving the monitoring efficiency of a substation and safe operation of the equipment.

The invention relates to the field of permanent magnet motor health state monitoring, and discloses a permanent magnet synchronous motor health state monitoring method and system based on multi-mode canonical correlation analysis to discover abnormal conditions of a permanent magnet motor during multi-working-condition operation in time, and the method and system are convenient to use and easy toimplement. The method comprises the following steps: selecting normal operation data of the permanent magnet synchronous motor under more than two working conditions as a training data set, and inputting the training data set into an EM algorithm to calculate and obtain parameters required by modeling; acquiring online operation data of the permanent magnet synchronous motor, and establishing a multi-modal monitoring model according to the parameters and the operation data; and monitoring the health state of the permanent magnet synchronous motor in combination with the evaluation indexes obtained by the model and a preset fault probability threshold.