30results about How to "Avoid major failures" patented technology

An elevator installation includes a cage, a counterweight which balances the cage and a supporting and / or drive means at which the cage and the counterweight are suspended. The elevator installation has a sound pick-up designed for detecting solid-borne sound generated at the counterweight.

The invention relates to a reactive power compensation protective device in a power transmission and transformation system, and belongs to the technical field of reactive power compensation in the power transmission and transformation system. The technical scheme is that a plurality of single capacitors (11) are connected in parallel to form string sections of high-voltage parallel capacitor groups; each string section is connected with a discharging coil (12) in parallel; a current unit (16) which contains a current sensor is arranged on each capacitor branch of each single capacitor; a background host processes received current signals of all the current units and received voltage signals of all the discharging coils, and transmits data to a protective module. According to the reactive power compensation protective device in the power transmission and transformation system, the sensitive protection on discharging coil failures and each capacitor can be realized; the most sensitive protection and failure warning on the high-voltage parallel capacitor groups can also be realized earliest; the reuse rate of reaction equipment is improved; the operation reliability of a reactive compensation device is improved; major failures are avoided as far as possible; the protection sensitivity is improved; failure equipment is cut in time; serious failures are avoided.

The invention discloses an intelligent fault diagnosis system and method for a large composite dry separator, and relates to the field of ore dressing machineries. The system comprises a detection module and an analysis and diagnosis module, wherein the detection module is used for detecting the temperatures of a bearing and a motor of the composite dry separator, the amplitude and frequency of the motor, the deformation of a beam and the noise decibel of the separator, and transmitting detection data to the analysis and diagnosis module; and the analysis and diagnosis module is used for analyzing the detection data, judging whether the composite dry separator has a mechanical fault or not, storing a fault waveform, predicting and judging a fault type, issuing a fault suggestion solution and sending alarm information. According to the intelligent fault diagnosis system and method for the composite dry separator, the safe operation of equipment can be guaranteed, accidents are preventedand reduced, the production efficiency is improved, and the economic loss of a coal preparation plant is reduced.

The invention discloses a multiphase voltage stabilizer for carrying out phase current testing in a slope current mode and belongs to the technical field of multiphase voltage stabilizers. The multiphase voltage stabilizer comprises a multiphase regulator, wherein the multiphase regulator comprises a power stage 100, wherein the power stage 100 comprises a plurality of output phases 102 and a controller 200 used for controlling the power stage 100, and the controller 200 is provided with a self-test unit. The stabilizer is used for identifying the condition that the multiphase regulator cannotwork normally, therefore, the regulator is prevented from suffering from major faults during working, a controller of the multiphase regulator uses a complex method to execute self-checking of the regulator; the abnormal operation condition is detected by checking the available information in the controller, alternatively, the controller may detect a number of fault conditions in which the multiphase regulator may still provide regulation in some cases, but may fail when operating conditions change, or operate the system using a particular operating mode to detect abnormal operating conditions in which the controller may detect many fault conditions.

The invention provides a lubricating grease pollutant detection device and method. The device comprises a lubricating grease heating and liquefying module and an oil liquid detection chip, the lubricating grease heating and liquefying module comprises a lubricating grease inlet, a resistance wire heating device and a first metal pipe; the lubricating grease inlet is connected with the resistance wire heating device, and the lubricating grease inlet and the resistance wire heating device are both arranged in the first metal pipe and wrapped by the first metal pipe; lubricating grease is heated by the resistance wire heating device through the lubricating grease inlet, so that solid lubricating grease is liquefied; the oil detection chip comprises an oil inlet, a micro-channel, a detection unit and an oil storage tank; the oil inlet is formed below the resistance wire heating device, the detection unit is connected with the oil inlet through a micro-channel, the oil storage tank is connected to the tail end of the micro-channel, a liquefied lubricating grease sample is conveyed to the detection unit through the oil inlet, and the detection unit detects metal particles and moisture in the oil sample; and the detected oil sample flows into the oil storage tank through the micro-channel.

The invention provides a cylinder cover and an engine. A cooling water jacket is arranged in the cylinder cover, and comprises an upper layer water jacket body, a middle layer water jacket body and alower layer water jacket body which are sequentially arranged from top to bottom; the side wall of the cylinder cover is provides with different water inflow holes communicating with the upper layer water jacket body, the middle layer water jacket body and the lower layer water jacket body; and cooling liquid can enter the upper layer water jacket body, the middle layer water jacket body and the lower layer water jacket body through the different water inflow holes to cool different areas of the cylinder cover. According to the cylinder cover and the engine, by arranging a thick fire power plate to meet the high detonation pressure and high load requirement of the cylinder cover, the strength level of the cylinder cover is substantially improved; due to the fact that the side face of the fire power plate is provided with cooling through holes, the three-layer cooling water jacket structure is formed; the bottom plate can be cooled through the middle layer water jacket body and the lower layer water jacket body at the same time, and the cooling capacity of the cylinder cover is enhanced; and the side face of the cylinder cover is provided with an installing hole for installing a detonation pressure sensor, through the detonation pressure sensor, detonation pressure of the engine can be monitored in real time, and a huge fault is prevented from happening.

The invention discloses a method for judging the abnormality of a motor stator current spectrum analysis device, comprising the following steps: collecting motor current signals, monitoring whether there is abnormality, analyzing the abnormality type, and judging the abnormality severity. First, collect the motor current signal, confirm that the collected signal points are correct, analyze and confirm whether there is a motor abnormality, and filter the collected signal. Through continuous practice, it is found that the frequency amplitude of the motor abnormality is related to the severity of the motor abnormality. The above judgment method can quickly and accurately analyze the abnormal severity of the electrical equipment online, so as to judge whether an emergency shutdown is required for maintenance, so as to prevent major equipment failures in advance.

The method and device for analyzing the risk of program operation provided by the present invention acquire the operation data of the program; determine the abnormal operation data of the program according to the operation data of the program and the preset reference operation data; wherein, the reference operation data It is determined according to the normal operation data in the historical operation log of the program; according to the abnormal operation data of the program, it is determined whether there is an operation risk in the program, so that the program operation process can be discovered in time before a major failure occurs in the program The potential risks in the program enable the operation and maintenance personnel to take timely measures against the operational risks of the program to avoid major program failures, thereby improving the robustness of the program running process and ensuring the normal operation of the business.

The invention discloses a method for determining the output oil volume of an electronically controlled diesel engine under abnormal conditions. The method includes: obtaining the corrected limited oil volume, which includes the following steps: calculating the external characteristic limited oil volume and the limit air-fuel ratio limited oil volume; Calculating a first fuel quantity limiting coefficient according to one or more abnormal conditions; calculating a modified external characteristic limiting fuel quantity; calculating a second fuel quantity limiting coefficient; calculating a corrected limit air-fuel ratio limiting fuel quantity; The smaller value of the limited oil quantity of external characteristics and the modified limit air-fuel ratio limited oil quantity is used as the revised limited oil quantity; the basic cycle oil quantity is calculated; the comparison between the corrected limited oil quantity and the basic cycle oil quantity is obtained The small value is used as the actual output circulating oil volume; and the actual output circulating oil volume is used to adjust the fuel injection of the electronically controlled diesel engine. This method enables automatic repair of the diesel engine, avoiding major failures.

The invention provides an on-load tap-changer mechanical state monitoring method and system based on a multi-layer filter. The method comprises the steps of: acquiring vibration signals in a switchingprocess of an on-load tap-changer; performing normalization processing on the vibration signals; performing discrete Fourier transform on the vibration signals subjected to normalization to obtain frequency spectrum distribution of the vibration signals; determining a quality factor according to the frequency spectrum distribution and designing a multi-layer filter; inputting the frequency spectrum distribution to the multi-layer filter to obtain a plurality of sub-band signals to form a sub-band signal matrix; calculating a covariance matrix of the sub-band signal matrix according to columnsand the modulus maximum of the covariance matrix; calculating the statistical magnitude of the modulus maximum and the control limit of the statistical magnitude; judging the mechanical state of theon-load tap-changer according to the statistical magnitude. The method and the system can diagnose the mechanical work state of a tap-changer of a transformer and can detect whether the mechanical state of a tap-changer of a transformer changes effectively and accurately, so that effective measures can be adopted for a tap-changer timely.

The invention provides equipment and a method for monitoring blades of a wind turbine generator set. The equipment comprises a video collecting unit, a background image acquiring unit and an image abnormality detection unit, wherein the video collecting unit collects videos of the blades of the wind turbine generator set to acquire a video image sequence; the background image acquiring unit extracts background images from the acquired video image sequence; and the image abnormality detection unit detects whether the blades in the images in the video image sequence have abnormal image characteristics or not based on the extracted background images.

The purpose of this application is to provide a method and device for checking the startup of computing devices in a distributed storage system. Compared with the prior art, this application checks the startup of the computing device during the startup process of the computing device in the distributed storage system, and performs corresponding processing on the startup process of the computing device according to the corresponding inspection results; the present application Carry out a start-up check before the distributed storage system starts, standardize the software and hardware requirements of the distributed storage system, avoid major failures after the distributed storage system starts, and improve the stability and performance of the distributed storage system . Further, the application handles the startup process of the computing device according to the corresponding inspection result and the security level information of the startup inspection, and if the inspection result with serious impact is found, the startup is not allowed, and if the inspection result with secondary impact is found, the alarm will be called. deal with.

The invention discloses an on-line monitoring system for diesel lubrication oil, which comprises a host computer system and a slave computer system, wherein the slave computer system comprises an oil information monitoring sensor module, an automatic circularly oil-collecting module, a signal decoding and modulating module and an oil information gathering module; the oil information monitoring sensor module is respectively connected with the signal decoding and modulating module and the oil information gathering module; and the signal decoding and modulating module is connected with the oil information gathering module. The on-line monitoring system for diesel lubrication oil can realize the real-time and continuous monitoring and the fault warning for the diesel lubrication oil; monitoring and analyzing results of the on-line monitoring system are synchronous with the running state of a diesel engine; and the defects of artificial uncertainty influencing factors of off-line monitoring and delay of detecting and analyzing time of off-line sampling are overcome. Meanwhile, the defect of evaluating oil quality by using a single sensor is overcome by the on-line monitoring system, the complement characteristic of reflecting fault features by multi-information is achieved, and the accuracy of on-line monitoring and diagnosis is increased.

The present application relates to a parameter configuration method, device and computer equipment based on an industrial control panel. The method includes: obtaining a data configuration list to be configured, and displaying each parameter to be configured in the data configuration list on the display interface of the industrial control screen; detecting a configuration command triggered by the parameter to be configured; triggering a working condition simulation according to the configuration command Running operation; when it is determined that the operating result of the working condition simulation operation meets the preset configuration requirements, the parameters to be configured corresponding to the configuration command are sent to each connected unit to be tested, so that each unit to be tested can be configured according to the parameters to be configured. parameter configuration. This method realizes one-key parameter configuration of the unit to be tested, without the need for staff to manually configure on-site, reduces the mismatch and omission caused by manual operation errors, and reduces the consumption of human and material resources due to repeated configuration or modification. , to improve the efficiency of parameter configuration for large units to be tested.

The present invention relates to a magnetic memory scan detection apparatus of a cylindrical ferromagnetic component, comprising: a mobile platform; a lifting mechanism with one end fixed on the mobile platform, wherein the lifting mechanism includes a fixed portion and a lifting portion; a cross arm walking beam mechanism with one end fixed on the lifting portion, wherein the cross arm walking beam mechanism includes a fixed end and a guide rail beam, and the guide rail beam is provided with a movable block; a rotation mechanism arranged at the movable block, wherein the rotation mechanism is provided with a vertical shaft and the rotation mechanism can rotate by taking the vertical shaft as an axis; a rotation detection arm mechanism with a fixed end fixed on the rotation mechanism, wherein a rotating arm extends from the fixed end, the other end of the rotating arm is provided with a detection arm extending downwardly, and the detection arm is provided with a magneto-dependent sensor; and a control and acquisition device arranged at the fixed portion of the lifting mechanism. The magnetic memory scan detection apparatus is suitable for assembly lines, can perform early diagnosis and prediction for microscopic damage of the cylindrical ferromagnetic member, thereby preventing the generation of major failure of mechanical equipments and preventing security incidents.