42results about How to "Judging the running status" patented technology

The invention discloses a transformer fault classification and identification method based on a vibration analysis method. The method comprises the following steps: S1) selecting a transformer test object, and collecting transformer vibration signals under different states as sample data; S2) calculating the sample data by utilizing a Hilbert-Huang transform EEMD (ensemble empirical mode decomposition) method to obtain an intrinsic mode function; S3) extracting characteristic vector V in each intrinsic mode function component; S4) carrying out dimensionality reduction on the characteristic vector through a principal component analysis method, coordinates being projected to a two-dimensional image; S5) carrying out classification on the sample data through a K neighbor method; S6) calculating the distance between a test sample and an original sample through a distance formula; S7) carrying out mode recognition; and S8) outputting corresponding transformer fault type in mode recognition. Operation state of a transformer can be judged visually and effectively.

The invention provides a motor state determining method. When a frequency converter is used for driving a motor, the motor state determining method comprises: sampling the frequency and a current value of the output current of the frequency converter; drawing an approximate sinusoidal changing curve of the output current according to the sampled frequency and the current value of the output current; and when an abnormality (overcurrent) occurs to the output current of the frequency converter, determining the running state of the motor by determining whether the actually-measured current value of the output current is on the drawn approximate sinusoidal changing curve, and if yes, determining that the motor is in a stalling state, or if not, determining that the motor is in an overexcitation state.

The invention provides a monitoring method and a monitoring device for resistive current of a zinc oxide lightning arrester, wherein the monitoring device comprises a current measurement module, a phase voltage measurement module, a data acquisition module and a communication module. The current measurement module, the phase voltage measurement module and the data acquisition module are interconnected through the communication module. The current measurement module and the phase voltage measurement module measure leakage current and phase voltage of the lightning arrester and furthermore transmit the measured results to the data acquisition module through the communication module. The data acquisition module calculates the resistive current of the leakage current. The measuring method and the measuring device realize simple and quick measurement for the resistive current of the zinc oxide lightning arrester and furthermore have high practical significance for maintaining normal operation of the zinc oxide lightning arrester.

The invention relates to an automatic monitoring comprehensive protection device of a scraper conveyor, in particular to a chain breaking, dislocation and chain falling comprehensive protection device of a scraper conveyor, which is applied to the field of coal mine machinery. Parallel chains are arranged on both sides of the scraper conveyor placed in parallel; scraping plates are uniformly and vertically arranged on each chain along the length direction of the chain; the chains are operated to a tail pulley from a head pulley of the scraper conveyor; a first proximity switch and a second proximity switch are arranged above the scraping plates; the first proximity switch and the second proximity switch are respectively connected with a monitoring device in parallel through signal wires in a heat shrinkage pipe. The comprehensive protection device disclosed by the invention has the advantages of high automation degree, little influence to the scraper conveyor and relatively wide application range and is simple and reliable.

The embodiment of the invention provides a method and device for determining a vehicle driving mileage and vehicle maintenance information, and a medium. The method for determining the vehicle drivingmileage comprises the following steps: obtaining a first driving mileage of a vehicle under a driving work condition; obtaining a second driving mileage of the vehicle under a power generation work condition; determining a third driving mileage based on the first driving mileage and the second driving mileage; and determining the vehicle driving mileage based on the first riving mileage, the second driving mileage and the third driving mileage. By adoption of the method provided by the embodiment of the invention, the technical problem of how to accurately determine the driving mileage is solved, accordingly, the operation state of the vehicle can be quickly and accurately determined, the components can be ensured to work within an available and safe range, a reasonable vehicle maintenance period can also be determined to improve the utilization rate and service capacity of the vehicle, and the reliability and aging degree of the vehicle can also be evaluated.

The invention discloses an air conditioner and a control method and device thereof. The control method of the air conditioner comprises the following steps that the current temperature in a room is acquired, and the air outlet temperature and the air return humidity of the air conditioner are obtained; the target capacity output value and the target dehumidifying value of the air conditioner are determined according to the indoor current temperature and the air return humidity; the actual capacity output value of the air conditioner is obtained, and the actual dehumidification value of the airconditioner is acquired according to the actual capacity output value of the air conditioner; and the air conditioner is controlled according to the target capacity output value, the target dehumidification value, the actual capacity output value and the actual dehumidification value. Therefore, according to the target capacity output value and the target dehumidifying value, the actual capacityoutput value and the actual dehumidification value, the current running state of the air conditioner can be accurately judged, the running parameters of the air conditioner are correspondingly adjusted in time based on the running state, and therefore the dehumidification stage of the air conditioner can be accurately and effectively controlled, the requirements of a user can be met, and the comfort degree of the user can be greatly improved.

A method for monitoring and hierarchically controlling pipeline thermal insulation status based on a dynamic envelope curve method comprises: establishing a method for evaluating the thermal insulation status of in-service pipelines and determining whether the pipelines need to be reconstructed; monitoring the temperature of the in-service pipelines with thermal insulation performance levels belowC, and installing optical fiber temperature measurement systems each consisting of a temperature controller and a temperature measuring optical fiber on the outer walls of the thermal insulation layers of the monitored pipelines for monitoring; installing 4G wireless routers on the outer walls of the thermal insulation layers of the in-service pipelines, and connecting the 4G wireless routers tothe temperature controllers through 232 interfaces to realize real-time data transmission and data monitoring; building an online monitoring system platform in a host PC; drawing a trend value point diagram of pipeline thermal insulation heat loss per unit area and pipeline total heat loss, and drawing a pipeline thermal insulation effect dynamic envelope curve on the diagram; performing pipelinethermal insulation effect control based on the pipeline thermal insulation effect dynamic envelope curve. The method can diagnose the occurrence of pipeline thermal insulation material failure early,and can take corresponding measures in time.

The invention discloses a transformer on-load tap-changer state monitoring device. The device comprises a vibration acquisition unit arranged on a tap-changer top cover, a current acquisition unit arranged on a driving motor and an angular velocity acquisition unit arranged on a transmission shaft, wherein the vibration acquisition unit is used for acquiring a vibration signal of the top cover, the current acquisition unit is used for acquiring a current signal of the driving motor, the angular velocity acquisition unit is used for acquiring an angular velocity signal of the transmission shaft, the vibration acquisition unit, the current acquisition unit and the angular velocity acquisition unit are respectively connected with a signal analysis unit through a signal conditioning module, and the signal analysis unit is used for judging a running state of the tap switch. According to the transformer on-load tap-changer state monitoring device provided by the invention, the running state of the tap-changer is judged by adopting a mode of mutually verifying three parameters, so accuracy of judging the state of the tap-changer is improved, risk pre-control is realized, the influence of power failure caused by overhauling after the tap-changer is abnormal is avoided, and time cost and equipment maintenance cost are reduced.

The invention relates to an online digital electrolytic cell health degree evaluation and calculation method. The method comprises the steps of: performing scoring according to the operation index data, the control index data and the production index data of an electrolytic cell, wherein the operation index data have a total score of 51, the control index data have a total score of 24 and the production index data have a total score of 25; calculating the operation index data, the control index data and the production index data to obtain scores; forming a computational mathematical model andsolidifying the model within a computer for real-time judgment and analysis of electrolytic cells. When the total score of the operation index data, the control index data and the production index data of an electrolytic cell is greater than or equal to 90, the electrolytic cell is in the A category; when the total score is greater than or equal to 80 and is less than 90, the electrolytic cell isin the B category; when the total score is greater than or equal to 70 and is less than 80, the electrolytic cell is in the C category; when the total score is less than 70, the electrolytic cell is in the D category. The A, B, C and D categories are excellent, good, medium and poor respectively. The operation state and the operation trend of an electrolytic cell can be judged in time, the production operation indexes of an electrolytic cell can be known in real time, and human intervention fluctuation is reduced.

The invention discloses an intelligent packaging box which comprises a box body, quick demounting type clamps, a power source and an MCU module. A box cover is arranged at an upper opening of the boxbody, reinforcing ribs and reinforcing strips are mounted on the box cover, and the reinforcing strips are arranged on the surface of the box cover and the surface of the box body in an up-and-down correspondence manner. The quick demounting type clamps are mounted on the box body, and the box body is connected with the box cover through the quick demounting type clamps and a sealing flange. A liquid crystal display screen and an alarm module are mounted on the box body, and an environment monitoring module is mounted on the inner wall of the box body. The power source and the MCU module are mounted in the inner wall of the box body. An inflation valve is mounted on the box cover, and a safety valve and a manual exhaust valve are mounted in the box body. According to the intelligent packaging box, different high-precision sensors such as a pressure sensor and a temperature and humidity sensor are mounted in the packaging box, the liquid crystal touch display screen is mounted on the outer portion, the pressure, temperature and humidity and other environment states in the box body can be displayed in real time, and meanwhile the function of real-time monitoring of the battery voltage is achieved.

The invention belongs to the field of stepping motor detection, in particular to an automobile stepping motor detection system. In view of the problems that the existing detection system has a singlefunction, on one hand, less detection data are acquired, thus lacking electric leakage and temperature detection of the stepping motor, and on the other hand, heat dissipation and cooling cannot be performed on the detected motor, thus affecting the service life of the stepping motor, the following scheme is proposed: the automobile stepping motor detection system comprises a module to be detected, a signal conditioning circuit module and a virtual instrument module, the module to be detected is connected with the signal conditioning circuit module, the signal conditioning circuit module is connected with the virtual instrument module, and the module to be detected comprises a stepping motor system unit, a motor driving circuit unit, an electric leakage detection unit and a temperature detection unit. The automobile stepping motor detection system provided by the invention has a reasonable structure and convenient operation, the detection system has various functions, not only acquirescomprehensive detection data, can perform real-time detection on the temperature of the stepping motor, and can also perform heat dissipation on the stepping motor, thereby prolonging the service life of the stepping motor.

The invention discloses an overhead transmission line insulator monitoring and analyzing method. An insulator monitoring module, an insulator performance display module, a power supply module, a communication module, a data processing and analyzing module and an intelligent early warning decision module are included. The insulator monitoring module comprises a distributed optical fiber sensing unit, a mechanical stress mathematical analysis unit and an electric field intensity conversion module. According to the invention, a high-precision optical fiber sensing technology is introduced into insulator monitoring, and the stress and temperature characteristics of the overhead transmission line insulator are accurately detected, so that the online monitoring is more comprehensive and accurate. According to the method, the latest optical fiber sensing technology is utilized, it is proposed for the first time that the accurate instantaneous stress value is obtained by detecting insulator deformation, the stress value is analyzed, and the operation state of each stressed material is accurately judged, and the method is based on accurate data information and can conduct refined management, accurate positioning and predictive development on the whole insulator.

The invention relates to the technical field of sulfur hexafluoride electrical equipment, in particular to an online diagnosis method and device for internal faults of sulfur hexafluoride electrical equipment. According to the method disclosed by the invention, the gas component data in the sulfur hexafluoride electrical equipment can be obtained in real time in the operation process of the sulfurhexafluoride electrical equipment. Through acquiring data of gas characteristic components such as sulfur oxide (fluoride) gas, whether a fault occurs in the sulfur hexafluoride electrical equipmentor not and the fault type of the fault are comprehensively, clearly and timely judged. The invention further provides an online monitoring device. The device comprises a first six-way valve, a first chromatographic column, a second six-way valve, a second chromatographic column, a third six-way valve, a detector, a quantitative tube, a carrier gas source, a gas purifier, a compression pump, a vacuum pump, a gas storage tank, a gas distributor and a calibration gas chamber. The device provided by the invention realizes automatic online monitoring and analysis of the sulfur hexafluoride electrical equipment insulating gas, and has the advantages of multiple measurable components, high sensitivity and stable and reliable performance.

The invention discloses a control method of a ceiling type fresh air unit. In the method, according to the big data simulation of the internet of things mode, according to different combinations of the specifications, models and performance of filters, the lifetime prompting of a filter component are carried out by data combination with a sensor component; by the detection for the indoor and outdoor environmental factor parameters through the combination of the sensor component and outdoor atmospheric data released by the state, whether the fresh air unit opens the full heat exchange module and the operation status and mode of the fresh air unit are comprehensive judged. The effect of energy saving is reached, and meanwhile the fresh air unit can be effectively controlled to be in an idealoperation status.

The invention discloses a water ring vacuum pump efficiency improving device and a control method, and particularly relates to the field of industrial machinery. The water ring vacuum pump efficiency improving device comprises a water ring vacuum pump and a DCS control system; a cold water supplementing pipe is fixed to a rear pipeline of a sealing water cooler of the water ring vacuum pump, and a sealing water cold water supplementing water source is introduced through the cold water supplementing pipe; a sealing water pneumatic normal water supplementing valve is fixed on the cold water supplementing pipe; a temperature sensor is arranged behind the sealing water pneumatic normal water supplementing valve; a pneumatic cold water supplementing valve is fixed on the cold water supplementing pipe; a manual stop valve is arranged behind the pneumatic cold water supplementing valve; and a pressure sensor is arranged on a pipeline in front of the pneumatic cold water supplementing valve. The operation state of the water ring vacuum pump can be comprehensively and effectively judged, once the system breaks down, the normal operation mode can be rapidly switched, or the water ring vacuum pump is interlocked and stopped, and the operation safety of the whole unit is guaranteed.