3354results about How to "Timely replacement" patented technology

The invention relates to a remote maintenance decision system of engineering machinery and a method thereof. The system comprises an information acquisition terminal, a client and a maintenance decision center. The information acquisition terminal acquires characteristic parameter information of a part of the engineering machinery in real time. The maintenance decision center comprises a life cycle phase determination module, a part residual life prediction module and a fault diagnosis and maintenance decision function module. The life cycle phase determination module receives the real-time characteristic parameter information and determines a present life cycle phase of the part. The part residual life prediction module carries out residual life prediction on the part at a normal phase or a performance decline phase. The fault diagnosis and maintenance decision function module carries out fault reason diagnosis on the part at a failure phase and provides a maintenance scheme. The client displays a residual life, or a fault reason and the maintenance scheme of the part. According to the system and the method of the invention, the life prediction or the fault diagnosis can be carried out on the part, and remote maintenance is carried out on the engineering machinery.

The invention relates to the field of electric power system monitoring, in particular to a cable 10kV high voltage ring main unit remote monitoring and control system which is used for conducting real-time monitoring of operation conditions of power distribution facilities and distribution cable lines, realizing early warning and alarming of abnormal and failure states and postmortem analysis after accidents, and controlling and regulating the operating environment of equipment through remote operation. According to the cable 10kV high voltage ring main unit remote monitoring and control system, grid smart operation management serves as the target, various on-line monitoring techniques are integrated, and monitoring cameras, a fan and solar equipment are installed in a switching station; the system can be used for checking the information of the monitoring cameras in the switching station in real time, monitoring the operating state of the fan, realizing the early warning and alarming of the abnormal and failure states and the postmortem analysis after the accidents, realizing dynamic evaluation of health conditions of the equipment, and realizing remote operation control over monitoring of the equipment; a multi-dimensional display technology is combined, safe and reliable operation capacity of a distribution network is enhanced, trouble shooting efficiency and maintenance efficiency are improved, and therefore a complete set of grid visual monitoring system is formed.

The invention relates to system and method for detecting the transformer winding state by using constant-current sweep frequency power source excitation. A measurement and control analysis module controls sweep frequency power source and applies output constant-current sweep frequency excitation signals by an exciting transformer at a high-voltage side of the transformer to be detected; a vibration sensor measures vibration response signals of a transformer winding to be detected at different excitation frequencies; a vibration signal collector collects and preprocesses the signals measured by the vibration sensor; and the measurement and control analysis nodule carries out spectrum analysis to the received and processed vibration response signal data, displays and records a resonant frequency curve of the transformer winding on a frequency domain, compares with the resonant frequency curve previously measured and recorded as well as the vibration frequency curve of a transformer three-phase coil, and judges the state of the transformer winding to obtain the measuring result. The invention can effectively and sensitively detect the states of looseness or deformation of the transformer winding for prompt repair or replacement so as to avoid a fault of abrupt short circuit of the transformer caused by damage of the winding structure.

The invention discloses a correlation analyzing method based on vehicle, road conditions and safe travel big data in a network of vehicles. The method comprises the following steps of data acquiring, data transmitting and storing, data de-noising, data analyzing, and data display and feedback. The data acquiring process is not limited to data of the vehicles, and it also includes data related to roads and surrounding vehicles. With data classification and storage, removal of abnormal values through de-noising, as well as multivariate linear regression fitting analysis, the correlations can be determined and sent back to the owner of a vehicle among the conditions for dangerous driving, vehicle's hardware state, road environments, surrounding vehicles and driving behaviors. The analyzing method provided by the invention can enable drivers to learn about their driving behaviors and their vehicles' states. For the instant replacement of parts with potential to bring danger and the rectification of bad driving behaviors, the purposes can be achieved including energy reduction, vehicle lifetime extending, and safe driving.

The invention provides an infrared humidifying device and a control method of the infrared humidifying device. The infrared humidifying principle is adopted for humidification, that is, water is heated to form water vapor for achieving the humidifying purpose by infrared ray radiation, and the requirement for water quality is low; the infrared humidifying device comprises multiple halogen lamp tubes which are connected in a star shape, when the halogen lamp tube in one phase line has a fault and the phase line where the faulted halogen lamp tube is arranged cannot carry out humidification, high voltage at the star-shaped connected public end can remind maintainers of replacing the lamp tube timely, and the operating reliability of the humidifying device can be ensured.

Disclosed are a plasma control device and method for blades of a wind driven generator. A plasma exciter is composed of an exposed electrode, an implantation electrode and a medium blocking layer, wherein the exposed electrode and the implantation electrode are pasted to the upper surface and the lower surface of the medium blocking layer respectively; the exposed electrode is exposed in air and connected with the high pressure end of an excitation power supply (7); the surface of the implantation electrode is wrapped by insulation materials, and the implantation electrode is connected with a ground electrode. The plasma exciter is installed on the surfaces of the blades of the wind driven generator smoothly. According to the environment where the wind driven generator is located and freezing parameters of the surfaces of the blades, a control system (11) adjusts the output waveform, potential, frequency and duty ratio of the excitation power supply (7), and controls the excitation power supply to be opened and closed. The plasma exciter produces air discharge under the action of the high voltage of the excitation power supply (7), produced plasma has the impact function, the acceleration function and the heating function on ambient air, flow separation on the surfaces of the blades of the wind driven generator is restrained, and icing is prevented and removed.

The invention provides an IGBT health state monitoring method based on a leakage current of a collector electrode. The method comprises the steps that after installation and debugging and before usage, an IGBT module passing detection is utilized for testing the leakage current of the collector electrode under certain conditions, and the leakage current of the collector electrode is recorded as an initial value; the leakage current of the collector electrode of the IGBT device is tested regularly and is recorded as a testing value; the testing value is taken into a collector electrode leakage current health state monitoring method simulation model, the fatigued aging process and the residual life of the IGBT device can be calculated, and the purpose of monitoring the IGBT health state is achieved; and when the deviation degree of the leakage current of the collector electrode reaches a failure standard, the device is determined to be invalid, at the moment, the IGBT device needs to be changed, and the above steps are repeated. By original state calibration and real-time monitoring, the health state and the reliability of the IGBT device in different life stages can be effectively estimated.

The invention discloses an air purifier with a sterilization function. The air purifier comprises a shell, a dust filter device, an air suction device, an ultraviolet lamp and an electronic control circuit. The dust filter device, the air suction device, the ultraviolet lamp and the electronic control circuit are arranged in the shell, an air inlet and an air outlet are formed in the shell, and the electronic control circuit is connected with a control fan and the ultraviolet lamp. The air purifier is characterized in that a spiral air channel is arranged in the shell, the air suction device is arranged at an end of the spiral air channel, and the ultraviolet lamp is inserted in the middle of the combined spiral air channel and is arranged along the axial direction of the spiral air channel. The air purifier has the advantages that the air purifier is simple in structure and can stably and smoothly run, and excellent sterilization and dust removal effects can be realized.

The invention belongs to the technical field of marine equipment, and particularly relates to a marine splash environment simulation test device, wherein stringed testing cable holes are arranged in the upper part of one side surface of the box-structured test box, a frame-structured drive pull rod is arranged on the other side, a splash plate angle adjusting rod is arranged at the lower part, and a splash plate is formed at the inner end of the splash plate angle adjusting rod; sensors and water inlets are arranged on the side surface of a liquid area from top to bottom; a gas exhaust opening, a ventilating and moisture exhausting device, an infrared heating lamp and a box temperature sensor are fixedly and sequentially arranged on the top side surface of the test box body from right to left; and a ultraviolet lamp, an air blower, a nozzle, a water spray pump, a liquid level controller, a dissolved oxygen sensor and a water drain opening are arranged on the opposite side of the test box corresponding to the side surface provided with the drive pull rod. The marine splash environment simulation test device has simple structure and higher automation degree, is convenient to operate, needs no staff attendance, and can simulate marine splash environment in a laboratory, so as to analyze and evaluate the corrosion and aging of the material.

The disclosed device includes core control module, excitation module and data acquisition and control module. The data acquisition and control module includes vibration sensor, charge amplifier and data acquisition unit connected to each other through circuits. The excitation module includes constant current source in frequency conversion and excitation transformer. Through analyzing change of natural resonance frequency curve of transformer winding, the disclosed device detects loosening status of winding, providing very high detection sensitivity.

The present invention discloses a TBM hobbing cutter wear online real-time monitoring device and a monitoring method. The device comprises a cutter seat, a hobbing cutter arranged on the cutter seat, a data collection module and a computer. The data collection module comprises a magnetic-sensing Z element and a permanent magnet arranged in the cutter seat and also comprises a fixed value resistor and a single chip microcomputer processor. A data collection loop is formed by the magnetic-sensing Z element, the fixed value resistor and the single chip microcomputer processor. When the magnetic field of the permanent magnet is changed due to hobbing cutter wear, the resistance change of the magnetic-sensing Z element is caused, and two end voltages of the fixed value resistor are changed too. The single chip microcomputer processor measures the two end voltages of the fixed value resistor and sends the voltages to the computer through a wireless transmitting module, and the computer calculates a hobbing cutter wear amount according to the corresponding relation formular of voltage and wear. According to the device and the method, the monitoring of hobbing cutter wear can be realized, the precision is high, a monitoring scale is large, the vibration interference resistance and waterproof abilities are strong, and the device can be conveniently disassembled and has strong application performance.

The invention relates to an indirect prediction method for the residual life of a lithium ion battery. The method comprises the following steps of collecting lithium ion battery monitoring data, a normalized battery capacity sequence and an equal-time voltage difference sequence; carrying out correlation analysis to extract health factors; constructing a lithium ion battery health state estimationmodel based on an echo state network; constructing a health factor prediction model based on a long short-term memory neural network, and calculating a health factor of a future cycle period; and calculating the true value of future cycle period capacity to finish the prediction of the residual life of the lithium ion battery. The invention further provides an indirect prediction device for the residual life of the lithium ion battery. According to the predication device and method, online prediction of the residual life of the lithium ion battery can be realized, and timely replacement and maintenance are carried out before the expiration of the residual life, so that normal operation of the lithium ion battery is ensured, and the prediction precision of the residual life of the lithiumion battery is improved.

The invention relates to a method for on-line detecting the faults of photovoltaic cells in a solar photovoltaic power station. Two controllable switches are respectively connected in series and parallel with the output ends of each cell module in a photovoltaic cell module matrix. A short-circuit current sampling resistor is connected in series with the branch of the parallel controllable switch, and a remote control system controls the two controllable switches of each solar photovoltaic cell, carries out short-circuit test and detection on each cell module needing to be tested, acquires the short-circuit current of the photovoltaic cells by means of the short-circuit current sampling resistors, and judges whether the cell modules have faults according to the short-circuit current. The method can diagnose the faults of one or more photovoltaic cells already mounted in the photovoltaic power station, and also can carry out timed tour inspection, the detection time is short, and the safety of the solar photovoltaic power station system is greatly enhanced.

The invention belongs to the technical field of masks, and particularly relates to a power respiration mask with a sensor. The power respiration mask comprises a mask body. A sealed cavity is formed between the mask body and the face of a wearer. The mask body is provided with an air inlet valve, an air outlet valve, the sensor and a controller, the air inlet valve is provided with a fan, the fan and the sensor are connected with the controller, the controller is provided with a battery, and the controller is wirelessly connected with a wireless receiver which is a mobile portable wireless receiver independent of the mask body. The power respiration mask can meet the requirements for comfort, safety and high efficiency at the same time, makes it convenient for the wearer to learn about the pollution degree of the environment where the wearer is located, and is wide in application range.

The invention discloses a non-destructive identification method for a material of an integral coil of a distribution transformer. The non-destructive identification method based on the difference of attenuation coefficients of copper, steel and aluminum to X rays includes photographing the distribution transformer in a integral state by the X rays; measuring blackness of photographed negative films of the rays by a black and white densitometer; inputting measured blackness values into a computer; and computing X-ray attenuation coefficient and transillumination thickness curves, which are stored in the computer, of the copper, the steel and the aluminum corresponding to different X-ray tubes and comparing the X-ray attenuation coefficient and transillumination thickness curves with a characteristic curve of the industrial ray films, and judging whether the winding coil of the distribution transformer is made of the aluminum or the copper.

The invention relates to a double spiral axis double spiral ribbon concrete mixing plant, which relates to a mixer for clay or cement and other materials which turns around the horizontal or basically horizontal axis. The concrete mixing plant is provided with a machine body, a first agitation system and a second agitation system. The fist agitation system is provided with a left spindle head, a right spindle head and four spiral axes which are connected with the left and right spindle heads. The second agitation system is provided with the left spindle head, the right spindle and the four spiral axes which are connected with the left and right spindle heads. The direction of the spiral of an internal return unit shaft is opposite to that of the spiral of an internal feeding unit shaft; and the direction of the spiral of an external feeding unit shaft is opposite to that of the spiral of the external return unit shaft. The left and right spindle heads of the first agitation system and the second agitation system are connected with a bearing bracket arranged on the machine body. The speed at which the spindle axes move relative to materials is larger;, so the materials are subject to smaller resistance when being mixed in the mixer, the cement is difficult to curdle around the axes, and the materials flow smoothly in the mixer, thus ensuring that the mixer has .lower energy consumption and higher mixing efficiency, reducing cleaning time and increasing the service efficiency of the mixer.

The invention discloses a test device, in particular to a connector product test device which is high in test accuracy, reduces test cost and improves test efficiency. According to the connector product test device, a test pin is adopted to replace the test connector in the prior art for product testing, is arranged on a movable carrier and is electrically connected with a test terminal. During testing, the carrier moves by aid of manual operation or through a power device and drives the test pin to move in the direction of a connector to be tested, and finally the tail end of the test pin is contacted with a metal sheet of the connector to be tested to achieve testing. The connector product test device is widely applied to the connector test field.

The invention provides an LED shadowless lamp system with failure detection and repair functions, which comprises an LED irradiation device and a control unit, wherein the LED irradiation device comprises an LED layout frame body, LED light-emitting elements and light sensing units; the control unit is used for providing light that is used for sending drive control signals to the LED light-emitting elements and standby LED elements thereof so as to control the LED light-emitting elements; the LED layout frame body is divided into a plurality of accommodating units, wherein the LED light-emitting element or the standby LED element thereof are arranged at the bottom of each accommodating unit, and the light sensing unit is arranged on the side wall of each accommodating unit; when LED array display equipment is started, the light sensing units sense the light given out by the LED light-emitting elements, and luminous signals corresponding to the LED light-emitting elements are transmitted to the control unit by the light sensing units; and when the control unit judges that the LED light-emitting elements work abnormally, the standby LED elements of the LED light-emitting elements are started.

The invention provides a residual life predication method and device for the electromigration failure. The residual life predication method comprises the following steps of: building an electromigration life model of an MOS (metal oxide semiconductor) device; according to the current density and the first environment temperature as well as the electromigration life model under the preset normal working condition, obtaining the life T1 of normal electromigration failure; according to a target prognostic point T2, a second environment temperature and the electromigration life model, obtaining current density stress; inputting the current density stress into an MOS device electromigration failure early warning circuit based on a prognostic cell; if the MOS device electromigration failure early warning circuit based on the prognostic cell processes the current density stress for time T3, outputting a high electrical level; and according to T1, T2 and T3, obtaining the residual life of the electromigration failure corresponding to T2. The invention also provides a residual life predication device for the electromigration failure, which has the characteristics that the reliability on predicting the residual life of the electromigration failure of the MOS device can be improved, the prediction efficiency is improved, and the cost is lowered.

The invention discloses a flapping wing capable of automatically folding and unfolding for a flapping wing type micro aerial vehicle. The flapping wing consists of a power device, two hydraulic pipes, a plurality of creases, a plurality of supporting rods, a wing membrane and two folding devices, and the folding and unfolding of the flapping wing are realized by adopting a hydraulic principle. According to the flapping wing, the two hydraulic pipes and the plurality of supporting rods form wing veins of a bionic flapping wing, and the wing membrane is adhered to the bionic wing veins to form a wing surface. The flapping wing pumps liquid into different liquid chambers by virtue of a micro flow pump to generate a pressure so as to drive the flapping wing to fold up or unfold. The flapping wing disclosed by the invention has the beneficial effects of reducing the transverse size of flapping wing type micro aerial vehicle when the flapping wing type micro aerial vehicle does not fly, reducing the spaces required for carrying, transportation and storage, reducing transportation requirements, conveniently protecting the flapping wing of the aerial vehicle from being damaged, favorably replacing a damaged flapping wing to improve the service life of the micro aerial vehicle.

The present invention discloses a water purifier filtration core service life detection apparatus, which comprises: N filtration cores sequentially connected in a series, wherein N is an integer of greater than or equal to1; valves, wherein the inlet of the valve is respectively connected with the first end of the N filtration cores and the second end of the Nth filtration core; a detection module connected with the outlet of the valves and provided for detecting pressures of the first end and the second end of each filtration core so as to produce corresponding pressure detection signals; and a control module for controlling the valve so as to select the corresponding filtration core, acquiring the pressure difference value of the corresponding both filtration core ends according to the pressure detection signal, comparing the pressure difference values of both ends of each filtration core with a corresponding preset threshold, and judging whether the failure of each filtration core exists according to the comparing result. The water purifier filtration core service life detection apparatus has characteristics of high detection precision, cost saving, simplified control complexity, and improved reliability. The present invention further discloses a detection method of the water purifier filtration core service life detection apparatus.