33results about How to "Narrow down the scope of troubleshooting" patented technology

The invention relates to a method and a device for diagnosing automotive electronic control unit faults based on semi-physical simulation. The method comprises the steps that (1) a personal computer (PC) and a control system send standard input information to an electronic control unit to be detected and send standard output response information to a fault diagnosis and display module; (2) the electronic control unit to be detected processes and sends out the output response information; (3) the fault diagnosis and display module compares the standard output response information with output response information of electronic control unit (ECU) to be detected to draw a conclusion whether the electronic control unit to be detected breaks down; and (4) changing some input information, and diagnosing fault properties of the electronic control unit to be detected. The device comprises the PC, the control system and a simulation controller. Compared with the prior art, by means of the method and the device for diagnosing the automotive electronic control unit faults based on the semi-physical simulation, the fault clearing flow of an automotive electronic control is greatly simplified, the fault clearing range is narrowed, the fault diagnosis rate is further improved, maintenance workload result from diagnosis of replacement parts and fund employment amount of stock parts are effectively reduced, thus the maintenance cost is greatly reduced.

The invention provides a determining method for RH vacuum leakage position, belonging to the field of RH vacuum furnace application fault resolution. The position of vacuum system leakage can be determined according to different changes of mass flux of tail gas of the vacuum system and percent concentration of O2 and CO in the tail gas by mass; the specific method is to determine the leakage position by the following technical parameters. The method has the advantages of reducing the fault resolution range to determine the fault position and improving the efficiency of leakage resolution. Meanwhile, the method can predetermine occurrence of an accident, reduce probability of occurrence and extension of accidents, and improve the operation rate of the RH vacuum furnace.

The invention discloses a vehicle-mounted multimedia audio system test method and device, and a vehicle-mounted multimedia system. The vehicle-mounted multimedia audio system test method comprises the following steps: obtaining a test starting instruction emitted from a user, and generating a key node signal test instruction according to the test starting instruction; according to the key node signal test instruction, successively obtaining the signals of N key nodes, and independently testing the signals of the N key nodes; according to a received pin state test instruction, obtaining the state information of other pins, except the pin which outputs a control signal, of a first processor, and independently testing the state information of other pins; and according to a received register state test instruction, obtaining the state information of other registers, except the register of which the storage information is revised, of a second processor, and independently testing the state information of other registers. The troubleshooting time of the vehicle-mounted multimedia audio system can be greatly shortened, and a troubleshooting range can be reduced to a maximum degree.

The invention discloses a quenching detection device and method for a high-temperature superconducting magnet. The quenching detection device comprises a fiber bragg grating string FBG1, a fiber bragggrating string FBG2, a data acquisition module and a data processing module, wherein a plurality of fiber gratings are arranged on the FBG1 and the FBG2; the fiber bragg gratings can sense tiny deformation and temperature rise of the magnet due to quench in time, and are sensitive to the temperature and strain of the high-temperature superconducting magnet; the FBG1 and the FBG2 are wound on thesurface of the high-temperature superconducting magnet in parallel, the FBG1 is attached to the surface of the high-temperature superconducting magnet, and the FBG2 is attached to the surface of the high-temperature superconducting magnet by using mucilage glue, so that the temperature and the strain of each position of the high-temperature superconducting magnet can be rapidly detected at the same time; when the magnet has a local fault, due to accumulation of heat in a local area, the area can quickly change in temperature and strain; and although the voltage of the magnet at the moment is not changed, the fault of the magnet can be detected through the change in temperature and strain, so that the quench detection speed of the high-temperature superconducting magnet is greatly improved.

The invention discloses an intelligent substation process layer physical link fault diagnosis method, and relates to the field of intelligent substations. The method comprises the steps of analyzing an SCD file, and obtaining related information of a logic link of a process layer of a whole station and switch configuration information; Obtaining a path node set of a whole station process layer logic link; Analyzing the chain scission signal, obtaining information related to the chain scission signal, and preliminarily screening out a path node set possibly having problems based on the information; Traversing other non-triggered chain scission signals; based on process layer message information related to the triggered chain scission signal, combining with network message analysis; path nodes possibly having problems are further eliminated based on the starting point port power information, the end point port power information and other means of the logic link related to the triggered broken link signal, and the rest path node sets are ranked according to the probability to obtain a final diagnosis result. On the basis of probability statistics, the fault diagnosis range is furtherreduced, and the positioning accuracy is enhanced.

The embodiment of the invention provides a troubleshooting method, a troubleshooting device and a server, wherein the method comprises the following steps: when an operation request aiming at a firstwebpage web application is received, adding a flag bit for the operation request, and calling a target thread to process the operation request, meanwhile, adding the flag bit for a log generated in aprocessing procedure; when that the target thread generates fault warning is detected, finding out a target log comprising the flag bit from a log base and outputting the target log, thereby facilitating troubleshooting. With the method, the device and the server provided by the embodiment of the invention, a troubleshooting range can be narrowed, and fault processing efficiency can be improved.

The invention discloses an offshore wind plant submarine cable monitoring and protecting system and method, and the method comprises the following steps: carrying out the real-time monitoring of the temperature, strain and disturbance state of a submarine cable, obtaining the ship information through a ship automatic recognition system, and arranging an electronic fence outside the submarine cable, giving an alarm to the ship entering the electronic fence according to the ship navigational speed in the ship information; predicting the trajectory direction of the ship according to data acquired by a ship automatic identification system, tracking the ship through a radar, carrying out view screen shooting on the ship, expelling the ship, and carrying out positioning analysis on a submarine cable fault point. According to the invention, comprehensive monitoring and protection of the submarine cable, which integrates submarine cable state monitoring, AIS ship information monitoring and radar scanning, trajectory prediction and video storage, are realized, so that the operation safety of the submarine cable is guaranteed. And the submarine cable can be conveniently protected from the operation state of the submarine cable, ship hazard early warning and the like.

The invention relates to the technical field of cable fault detection, and particularly discloses a cable monitoring system. The cable monitoring system comprises a plurality of voltage sensors, detection devices, code sending devices and a decoding device, wherein the plurality of voltage sensors are respectively arranged at each monitoring point of a cable; the detection devices are connected with the voltage sensors one to one; the code sending devices are connected with the detection devices one to one; the voltage sensors are used for acquiring voltage signals on the monitoring points; the detection devices are used for driving the code sending devices to generate codes and sending the codes to the decoding device when the voltage signals are abnormal, wherein the codes are used for indicating positions of the monitoring points; and the decoding device receives the codes and decodes so as to acquire and output position information of the monitoring points. According to the invention, a plurality of monitoring points are reasonably arranged on a cable line, and by detecting voltages on the monitoring points, a cable fault removal range is shortened, and troubleshooting efficiency is improved.

The invention discloses a power distribution network line constant value on-off detection method and system based on a constant value coordination diagram. The method comprises the steps of: dividingmulti-section protection according to the superior-subordinate relation of protection devices in a transformer substation wiring diagram; calculating action current and action time limit of each section of protection by adopting a distance protection conversion method to obtain a constant value of each section of protection, synchronously marking the constant value and tripping logic in the transformer substation wiring diagram, and constructing a constant value matching diagram; and controlling the on-off operation of the power supply side protection device and the power utilization side protection device according to the fixed value matching graph and the belt stringing mode between the transformer substations. By dividing multi-segment protection, a distance protection conversion methodis adopted to calculate protection constant values in a segmented mode, and the efficiency of constant value calculation is improved; and a constant value matching graph is used to assist in controlling the on-off operation of the protection device, thereby reducing the line patrol operation and maintenance time, reducing the workload, increasing the power supply amount, and guaranteeing the power supply safety and reliability.

The invention provides a cross interconnection type cable fault identification method, unit and system. The cross interconnection type cable fault identification method comprises the following steps of collecting current information data; the receiving end processing device receiving the current information data; calculating the ratio of the sheath ring current data to the load current data, and forming an array; and comparing the array with a preset fault array, and performing fault correlation analysis and judgment. According to the cross interconnection type cable fault identification method provided by the invention, types and the fault sections of the cable faults can be accurately identified and judged, the troubleshooting range of safety operation and maintenance personnel is greatly reduced, labor is saved, and operation and maintenance efficiency is improved.

The invention discloses a fault diagnosis method and system for automobile internal parts or lines and a medium, and belongs to the field of automobile diagnosis. In order to solve the problems that an existing automobile is low in maintenance efficiency and high in cost, the invention provides a fault diagnosis method for automobile internal parts or lines, which comprises the following steps: collecting automobile fault data; sending the fault data to a fault simulation circuit diagram; S3, the fault simulation circuit diagram feeding back a fault part or line according to the received automobile fault data, and feeding back a corresponding maintenance scheme at the same time; and S4, maintenance personnel carring out corresponding automobile fault diagnosis and troubleshooting according to the maintenance scheme. According to the invention, specific fault parts or fault lines are fed back through the fault simulation circuit diagram according to the received fault data, and then a corresponding maintenance scheme is given, so that the time and efficiency of automobile fault maintenance are greatly improved; and a specific fault point can be quickly found according to the fault data, so that the time cost is saved. The whole system is clear in division of labor and simple in composition.

The invention relates to a method for quickly detecting a non-heating fault of an electromagnetic oven, which comprises the steps that an LED (light-emitting diode) is connected to a primary coil of a small power transformer in parallel to act as an indicating lamp, the indicating lamp is placed on the electromagnetic oven, a power switch is turned on so as to enable the electromagnetic oven to get into an operating state, and whether a coil panel has PWM signals or not is detected according to whether the indicating lamp flashes or not. The invention further relates to a device for quickly detecting a non-heating fault of the electromagnetic oven, which comprises a primary coil of a small power transformer and an LED (light-emitting diode), and is characterized in that the light emitting diode is connected to the primary coil of the small power transformer in parallel.