47results about How to "Avoid fault misjudgment" patented technology

The invention provides a brake pedal fault diagnosis method and device. The brake pedal fault diagnosis method includes the steps that a first on-off state and a second on-off state of a brake pedal are obtained in real time; if the effective states of the first on-off state and the second on-off state are not identical, it is judged that a suspected fault happens to the brake pedal; and when thesuspected fault meets a first preset condition, it is judged that a fault happens to the brake pedal. By the adoption of the brake pedal fault diagnosis method, fault diagnosis of the brake pedal canbe achieved through a simple structure, the fault diagnosis cost of the brake pedal is reduced, fault misjudgment can be avoided to a certain degree, and the fault diagnosis reliability of the brake pedal is improved.

The invention provides a multi-channel signal acquisition circuit for downhole power system parameter measurement. The multi-channel signal acquisition circuit comprises a micro-processor, a parameter acquisition circuit, a storage circuit, a clock circuit, a resetting circuit and a computer. The micro-processor is connected with the parameter acquisition circuit, the storage circuit, the clock circuit, the resetting circuit and the computer. The signal acquisition circuit added in a power supply of an intelligent drilling tool can monitor the working state of a downhole power system, record the voltage and current change condition of each link of the power system, provide objective and authentic measured data for the fault analysis and maintenance of the power system of the intelligent drilling tool, prevent hidden danger of fault misjudgment and risk oversight caused by single ground detection, shorten the maintenance period of the intelligent drilling tool, improve the safety and stability of downhole work of the intelligent drilling tool and prolong the service life of the intelligent drilling tool.

The invention discloses a method for preventing fault misjudgment of a battery management system. The method comprises the steps that fault information is detected and first timing is started; when the first timing reaches first preset time, the fault information is still detected; 'first fault diagnose' is marked with a position bit; the power of a battery package is controlled to decline to a preset power at a first power speed, or the current of the battery package is controlled to decline to a preset current at a first current speed; the fault information is detected once every second preset time, and second timing is started; whether or not the fault information is detected again in third preset time is judged; if yes, 'second fault diagnosis' is marked with a position bit; the powerof the battery package is controlled to decline from the preset power to a limit power at a second power speed, or the current of the battery package is controlled to decline from the preset current to a limit current at a second current speed, and a relay of the battery package is controlled to be disconnected. The invention further discloses a system for preventing fault misjudgment of the battery management system.

The invention provides a conflux detection method and system for conflux boxes. The mutual calibration of current values of adjacent or close input ends in zero value judgment and the number of solar battery pack strings actually connected with the input ends of the same-level conflux boxes in mean value judgment are included in the scope of mean value judgment and consideration, so that mutual calibration of the change rates of current values of the adjacent or close input ends is conducted in high value out-of-limit and low value out-of-limit judgment, and the fault judgment accuracy of the conflux boxes in a photovoltaic array is improved. The invention further provides a solar power station.

A planetary gear box intelligent diagnosis method based on a multi-flow fusion model comprises the following steps: firstly, acquiring an encoder signal, smoothing the encoder signal to obtain a smooth signal, and performing first-order and second-order difference on the smooth signal to obtain an angular velocity signal and an angular acceleration signal; Secondly, dividing the smooth signal, theangular velocity signal and the angular acceleration signal into a training set, a verification set and a test set respectively to obtain a smooth signal data set, a harmonic signal data set and an impact signal data set; Aiming at the smooth signal, the angular velocity signal and the angular acceleration signal, respectively constructing corresponding convolutional neural network models, carrying out differential training, fusing high-level abstract features in an independent frequency domain learned by the three convolutional neural network models, and finally obtaining a multi-flow fusionmodel; optimizing High-level parameters of the multi-stream fusion model to obtain a final model, carrying out fault classification, and use the t-SNE technology to visualize the classification results of the test.; According to the invention, different types of faults can be distinguished, and high-precision fault diagnosis is realized.

The invention provides a convergence detecting method and system for a convergence box. A zero value and mean value judging method is utilized for carrying out fault detecting, during zero value judgment, current values of adjacent input ends or similar input ends are utilized for verification, during mean value judgment, the number of solar battery pack strings actually connected to the input ends of the convergence box of the grade are taken into consideration for mean value judgment, and the fault judgment accuracy of the convergence box in a photovoltaic array is improved. The invention further provides a solar power station.

The invention provides a convergence detection method and system for a convergence box. False alarm rate of faults of the convergence box in a photovoltaic array is lowered by checking current values of adjacent or nearby input ends and change rate of the the current values. The invention further provides a solar power station.

The invention discloses a tempering monitoring method and system, and relates to the field of engines. The method comprises the following steps of enabling an engine to operate normally, and obtainingthe position of a throttle valve, the air inlet pressure and the air inlet temperature; judging whether the throttle valve position change rate, the air inlet pressure change rate and the air inlet temperature change rate are within the corresponding preset change rate ranges or not; if not, obtaining an ignition advance angle, and otherwise, restoring the preset ignition advance angle; and judging whether the ignition advance angle is within a preset ignition advance angle range or not, if so, delaying the ignition advance angle, and correcting the ignition energy, and otherwise, confirmingan engine fault, limiting the torque and giving an alarm. Therefore, according to the tempering monitoring method and system, whether tempering occurs or not is judged through monitoring the change rates of the throttle valve position, the air inlet pressure and the air inlet temperature, meanwhile, the normal change condition is distinguished, fault misjudgment is avoided, after it is judged thata tempering fault occurs, timely maintenance and inspection are reminded through a torque limiter, a fault indicator lamp and the like, and engine parts are prevented from being damaged by tempering.

The invention provides a convergence detection method and system for convergence boxes. According to the convergence detection method and system for the convergence boxes, the number of the input ends of a current-stage convergence box which are actually connected with a solar energy battery pack string is put into consideration of mean value judgment; high value limit crossing and low value limit crossing of the change rate of current values of adjacent or approximate input ends are verified; and therefore, fault judgment accuracy of the convergence boxes in a photovoltaic array can be improved. The invention also provides a solar power station.

The invention discloses a service processing method of a storage cluster, which comprises the following steps: receiving a service processing request, and analyzing the service processing request to obtain a node selection rule of a to-be-processed service corresponding to the service processing request; calculating a corresponding target main node number and a corresponding target backup node number according to a node selection rule; calling the node management array through the running state machine to judge whether the target main node number and the target backup node number are valid ornot; if yes, selecting a target main node corresponding to the target main node number and a target backup node corresponding to the target backup node number from the storage cluster; and processingthe to-be-processed service by utilizing the target main node and the target backup node. The effectiveness of the selected target main node number and the target backup node number is determined, fault misjudgment is avoided, and normal operation of service processing is guaranteed. The invention further discloses a service processing device and equipment of the storage cluster and a storage medium, and the corresponding technical effects are achieved.

The invention provides a convergence detecting method and system for a convergence box. By means of verification of current values of adjacent input ends or similar input ends, the fault false alarm rate of the convergence box in a photovoltaic array is reduced. The invention further provides a solar power station.

The invention provides a CPLD fault detection and repair method and device, and the method comprises the following steps: S1, cutting off the power-on control of a CPLD for a BMC, enabling the BMC tobe directly connected with a power supply, and enabling a GPIO pin of the BMC to be connected with the CPLD; S2, enabling the BMC to control the upgrading of the CPLD and store an online upgrading package of the firmware of the CPLD; and S3, enabling the BMC to monitor a fixed register of the CPLD through an I2C bus, start CPLD heartbeat detection through a GPIO pin when the fixed register is abnormal, and start a CPLD online upgrade package and refresh CPLD firmware again when the CPLD heartbeat detection is abnormal. According to the invention, the dependence of the BMC on the power-on of the CPLD is cut off, the BMC is adopted to carry out dual detection on the CPLD fault by utilizing the I2C bus and the GPIO pin, the misjudgment of the CPLD fault is effectively prevented, and the CPLDfault can be repaired through online upgrading when the CPLD fault occurs.

The invention relates to a fault diagnosis method and system for a hot air adjusting baffle. The feedback value of the opening degree of the hot air adjusting baffle of a coal mill is obtained; and according to the feedback value of the opening degree of the hot air adjusting baffle of the coal mill, whether the hot air adjusting baffle of the coal mill has a blockage fault or a sudden closing fault or not is judged. By acquiring the feedback value of the opening degree of the hot air adjusting baffle of the coal mill, whether the hot air adjusting baffle has the blockage fault or the sudden closing fault or not can be diagnosed, so that an effective early warning can be given to a worker, and a relatively great negative effect caused by frequent blockage, sudden closing and other faults of the hot air adjusting baffle is avoided.

The invention discloses an oil tank isolation valve fault diagnosis method, which comprises the following steps of: after a fault diagnosis working condition is formed, performing diagnosis pressure source self-inspection; pressurizing the oil tank and the carbon tank pipeline, and recording a diagnosis pressure source current variation and an oil tank pressure variation in a first specified time period; according to the diagnosis pressure source current variation and a first specified threshold value of the diagnosis pressure source current variation, judging whether the oil tank isolation valve has a first type of fault or not; stopping pressurizing the oil tank, continuing pressurizing the carbon tank pipeline, and recording the current variation of the diagnostic pressure source and the pressure variation of the oil tank in a second specified time period; and according to a diagnosis pressure source current variable quantity specified threshold value and a fuel tank pressure variable quantity specified threshold value, judging that no fault occurs, a first type of fault occurs or a second type of fault occurs. Misjudgment and missed judgment of the clamping stagnation fault of the oil tank isolation valve fault can be avoided, and the fault judgment accuracy is improved.

The invention discloses a thermostat, a thermostat control method and an engine cooling system. The thermostat comprises two outer supports and a temperature sensing sensor set, a shell is arranged at the bottoms of the opposite sides of the two outer supports, an outer shell is arranged in a cavity formed by the shell and the outer supports, a temperature sensing medium is arranged in an inner cavity of the outer shell, a push rod is arranged in an inner cavity of the temperature sensing medium, the bottom of the push rod penetrates through the inner cavity of the outer shell and extends to the outside of the shell, and the bottom of the push rod is fixedly connected with electric control equipment. According to the thermostat control method, the water temperature of an engine can be stably controlled, the actual water temperature fluctuation is small, the stable state is basically achieved, the actual water temperature and the target water temperature are kept roughly consistent, meanwhile, in the fault detection process, fault misjudgment is effectively avoided, the fault analysis and diagnosis rate is increased, and then the normal operation of a vehicle is effectively ensured.

The invention discloses a cleaning-free detection method of a weld seam of an electronic fitting. The method comprises a vacuum detection bench, the vacuum detection bench is connected with a detection panel through an enclosed telescoping port, and the detection panel is provided with an extraction opening in vacuum communication with the inside of the vacuum detection bench; and the vacuum detection bench is also provided with an alcohol storage box, and a syringe is configured on the alcohol storage box. According to the invention, alcohol in the alcohol storage box is drawn off by use of the syringe and is injected to the sealing end of the fitting to enable the sealing end to be covered by the alcohol, then the vacuum detection bench carries out vacuum extraction, if the alcohol at the sealing end does not disappear obviously and rapidly, it is proved that sealing is good, if the alcohol disappears rapidly, this indicates that the sealing is defective, and thus the sealing end is adjusted.

The invention discloses a no-clean detection process for the welding seam of a titanium alloy assembly, which comprises a vacuum detection platform, on which a detection plate surface is connected through a closed telescopic opening, and a detection plate surface is provided with a vacuum An air pumping hole connected to the vacuum inside the testing platform; an alcohol storage box is also arranged on the vacuum testing platform, and a syringe is arranged on the alcohol storage box. The present invention uses a syringe to extract the alcohol in the alcohol storage box, and injects it at the sealing end of the pipe fitting, so that the sealing end is covered by alcohol, and then vacuum extraction is carried out on the vacuum detection platform. If the alcohol at the sealing end disappears obviously and quickly, it is proved The seal is good, if the alcohol disappears quickly, it means that the seal is defective, so adjust the seal end.