61results about How to "Implement fault monitoring" patented technology

The embodiment of the present invention discloses a charging control method and system. The method includes a step of receiving a high-voltage power-on instruction sent by a VCU, closing a main negative relay, and connecting a negative output end of a battery pack to a negative connecting end of a load circuit, a step of closing a first pre-charge relay in a first pre-charge circuit when a condition that the front and back voltage of the main negative relay reaches target voltage is monitored, accessing the first pre-charge circuit and carrying out pre-charge on a high voltage loop, a step of carrying out fault reporting when the pre-charge of a load loop is completed in T1 after closing the first pre-charge relay is monitored and stopping high-voltage power-on, and a step of disconnecting the first pre-charge relay when a condition that a ratio of the voltage of the load loop to the voltage of the battery pack is smaller than a preset ratio in T2 after closing the first pre-charge relay, accessing the second pre-charge circuit, and repeating the above flow. According to the embodiment of the present invention, an abnormal condition in a pre-charge process can be timely diagnosed.

The invention belongs to the field of aircraft engineering, and provides a nose-wheel steering system of an aircraft. According to the nose-wheel steering system, a steering control box is connected with an instruction sensor, a combined hydraulic valve and a feedback sensor through cables; one end of the instruction sensor is fixedly arranged below a floor of a cockpit of the aircraft by using bolts, and the other end of the instruction sensor is hinged to a foot pedal through bolts; the combined hydraulic valve is fixedly arranged on a bulkhead plate of a nose landing gear through bolts; the feedback sensor is arranged on a steering actuator; one end of the feedback sensor is fixedly arranged on a steering actuator shell through a hoop, and the other end of the feedback sensor is connected with a piston rod of the steering actuator through a clamping piece; the steering actuator is arranged on the nose landing gear of the aircraft; a piston rod of the steering actuator is hinged to a rotary sleeve of the nose landing gear through a joint bearing and a bolt. The nose-wheel steering system of the aircraft is used for steering at a low-speed stage and swing prevention at a high-speed stage during sliding of the aircraft, and has good operation flexibility and anti-swing stability.

The invention provides a power transmission line online fault monitoring method and system. The method comprises the following steps: integrating operation parameters and environmental parameters of the power transmission line under different faults to form a fault historical database, and constructing a neural network identification model of the power transmission line under different faults according to the fault historical database; collecting operating parameters and environmental parameters of the power transmission line, inputting the operating parameters and the environmental parametersinto the neural network identification model, and analyzing faults of the power transmission line; judging the fault occurrence reason according to the fault analysis result, and carrying out image acquisition on the possible fault points of the power transmission line; and performing feature extraction and analysis on the acquired images, and obtaining fault occurrence points according to analysis results. According to the power transmission line online fault monitoring method and the system thereof, the fault point can be judged at the first time, the fault searching time is shortened, thefault is eliminated as early as possible, the power transmission is recovered, and the power supply reliability is improved.

The invention discloses a fault monitoring method and device for a cooling system. The method and device are used for monitoring faults of the vehicle cooling system. The method comprises the steps that current-moment temperature values collected by temperature sensors in all electrical elements on a cooling system loop are received; the current-moment temperature value of each electrical element is compared with the highest temperature value of the corresponding electrical element, and a first comparison result corresponding to the corresponding electrical element is obtained; the unit time temperature rise value of each electrical element is obtained and is the difference of the current-moment temperature value and the last-moment temperature value of the corresponding electrical element; the unit time temperature rise value and the highest temperature rise value of each electrical element are compared, and a second comparison result corresponding to the corresponding electrical element is obtained; according to the first comparison results and the second comparison results corresponding to the electrical elements, whether faults exist in the cooling system or not is judged, and the fault cause is obtained.

The invention discloses a mine belt conveyor video centralized control system based on configuration software. The system is composed of a host computer host, an industrial Ethernet ring network, a server, a sensor, a camera, a cable, a control substation, an anti-explosion switch, a display, a communication gateway, a UPS anti-explosion power supply and the configuration software. According to the mine belt conveyor video centralized control system provided by the invention, an industrial Ethernet technology is used, and underground information is transmitted to a dispatching center through anetwork cable, so that the problem that underground data in the existing coal mine cannot be transmitted to an over-ground dispatching center in time is solved. Internationally universal configuration software iFix is used, so that a belt centralized control system integrating control, data acquisition, process monitoring, alarm and alarm management, trend analysis and other functions is realized, thus the acquisition speed of the underground information on the well is effectively accelerated, and remote control and fault monitoring of underground equipment are realized.

The embodiments of the present invention provide an SDN network data flow monitoring method, an SDN controller, a switching device and system. The method comprises the following steps: issuing a firstconfiguration for counting data flow to a first switching device and at least one second switching device in the SDN network; issuing a second figuration for marking the data flow to the first switching device; transmitting a request for reporting the counting value of a last period to the first switching device and each second switching device; when the first switching device and the second switching devices count the data flow according to the marking value corresponding to the current period, receiving the counting value which counts the data flow according to the corresponding marking value within the last period and is reported via the first switching device and the second switching devices; and determining a monitoring result of the data flow within the last period according to thecounting value. The embodiment of the invention realizes continuous failure monitoring of the specific service data flow and provides a prerequisite for rapid error correction and recovery of the service.

The invention provides a service chain fault diagnosis method and a service chain fault diagnosis device. The method comprises the following steps: a service node receives a diagnosis option corresponding to a target service path sent by a previous node on the target service path, and sends the diagnosis option to a next node of the service node on the target service path, wherein the diagnosis option indicates a diagnosis method and content to be diagnosed; the service node receives an echo message which is sent by the next node of the service node on the target service path according to the diagnosis option corresponding to the target service path and the target service path; and the service node sends first chain fault information to a controller if the service node does not receive the echo message sent by the next node of the service node on the target service path in a preset number of cycles. According to the embodiment of the invention, the nodes in the path complete fault monitoring independently and report fault information to the controller independently, so that the fault information can arrive at the controller in time.

The invention discloses a pressure-adjustable mine high- and low-pressure water energy exchange system. The pressure-adjustable mine high- and low-pressure water energy exchange system comprises an underground integrated control center system of a monitoring system, which comprises an industrial control computer and is connected with a hydraulic station and a three-cavity water energy exchange device. While high-pressure freezing water is subjected to pressure relief, hot water is conveyed to the ground surface from the underground part through a water energy conversion pipe, so that the potential energy exchange between the cold water and the hot water is realized; the opening degree of an electric flow adjusting valve is controlled through signals of the temperature and the flow acquired by a temperature sensor and a flow sensor, and the flow of the cold water is adjusted to be matched with end load; an underground circulating water treatment unit guarantees the backwater quality of the hot water, makes sure the quality of the water flowing through the valve, and prolongs the service life of the valve; a variable frequency water complementing system guarantees the system to stably run; and the hydraulic station is used for controlling the valve to open and close according to a certain logic sequence through an instruction of the industrial control computer, guaranteeing the system to continuously and stably run, and monitoring the status of the system equipment.

The present disclosure relates to a vehicle failure monitoring method, device, system and vehicle. The method includes: acquiring vehicle running related parameters, the vehicle running related parameters at least including actual values ​​of vehicle speed and wheel speed; determining whether a transmission system of the vehicle fails according to the actual values ​​of vehicle speed and wheel speed. Thus, the transmission system failure can be judged and identified through the vehicle driving related parameters, and the failure monitoring of the vehicle transmission system can be realized. Moreover, it can provide support and basis for subsequent fault handling, which is beneficial to reduce potential safety hazards.

The invention relates to a fault detection and reconstruction system and method based on a dynamic-static hybrid strategy. Firstly, according to the current work mode of a control system, the fault detector and sensor configuration schemes are subjected to combined optimization; on the premise of ensuring the fault detection performance, the system energy consumption is possibly reduced; then, when the fault is detected, the real-time accurate recognition on the fault type is realized through solving the multi-model selection problem; finally, according to the recognized fault type, through the design of the reasonable switching control scheme, the control allocation and the system sterilization can be completed; the autonomous fault detection and reconstitution of the control system under various possible fault conditions can be realized. By using the technical scheme, the static fault monitoring and the dynamic fault type recognition and control system reconstruction are combined. Compared with a conventional fault detection and fault-tolerant control scheme, various kinds of potential faults can be effectively treated; the real-time performance is improved; the energy consumption is reduced; the system and the method can be applied to the high-reliability control problem of control objects of astrovehicles, mechano-electronics, chemical engineering and the like.

The invention discloses an online monitoring and evaluation method and system for the shielding effectiveness of a shielding layer of a communication cable. The method comprises: on the basis of a cable segmented frequency sweeping measuring method, fault identification and positioning of a cable shielding layer are carried out; with a loop impedance measurement method, the state of a grounding resistor of the cable shielding layer is determined; comprehensive analysis and reverse evaluation of the shielding effectiveness of the cable are carried out by using an algorithm. According to the invention, reasonable quantitative evaluation of the shielding effectiveness, which can not be evaluated easily in the prior art, of the shielding layer of the communication cable is realized; and a problem of the safety field of the communication cable shielding is solved. Meanwhile, with measurement of various cable physical parameters, systematic, holistic and complementary evaluation of the cableshielding layer is realized.

Disclosed is a monitoring circuit of a control system. The monitoring circuit comprises an outage circuit, an enable circuit, a restoration time-delay circuit, a watchdog circuit and a main control central processing unit (CPU); when the main control CPU is in abnormal work, the third port of the main control CPU outputs an electrical level free of jumping change; when the electrical level free of jumping change is input into the input port of the watchdog circuit, an internal counter cannot conduct zero clearing and overflows, and the output port outputs a low electrical level; when the input electrical level of the enable port of the enable circuit is a high electrical level, the output electrical level of the second port of the enable circuit is identical to the input electrical level of the first port of the enable circuit, and both the output electrical level and the input electrical level are low electrical levels; when the input electrical level of the third port of the outage circuit is a low electrical level, the outage circuit enters a switch-off state, so that the main control CPU is switched off and restarted. Through the monitoring circuit of the control system, fault monitoring of the control system, namely the main control CPU, can be achieved, and when the faults are removed, new instable faults generated due to insufficient outage can be avoided.

The invention discloses a PLC architecture for a mine communication control system and the mine communication control system. The PLC architecture comprises a detecting module, a coupling module, a voice conversation module, an intrinsic safety input/output module, a communication module and a PLC; the detecting module transmits a telephone audio signal and a dual audio signal along a line to thevoice conversation module, and transmits an equipment state signal and a blocking signal along the line to the PLC through the communication module; the coupling module feeds the voltage along the line back to the PLC and the voice conversation module in the mode of dual audio; the voice conversation module converts the received audio data stream into an audio analogue signal and plays the audio analogue signal after amplifying the audio analogue signal; the intrinsic safety input/output module acquires a belt equipment protection signal and motor state information, and transmits the belt equipment protection signal and the motor state information to the PLC; and the PLC realizes the control of equipment and belt equipment along the line on a working surface.

The invention discloses an intelligent optical cable monitoring system and method with an optical cable protection function. The intelligent optical cable monitoring system comprises a network management unit, a first optical switch, a second optical switch, a main optical cable, a standby optical cable, an OTDR module and a plurality of optical power monitoring units. Two input ends of the first optical switch are respectively used for inputting a service optical pulse and a test optical pulse; two output ends of the first optical switch are respectively connected with input ends of the main optical cable and the standby optical cable; the output ends of the main optical cable and the standby optical cable are respectively connected with two input ends of the second optical switch; two output ends of the second optical switch are respectively connected with a user end and a signal receiving end of the OTDR module; the plurality of optical power monitoring units are respectively used for monitoring line loss of the main optical cable or the standby optical cable; the OTDR module is used for monitoring fault information of the main optical cable or the standby optical cable; wherein the first optical switch is used for switching input optical pulses of the main optical cable and the standby optical cable, and the second optical switch is used for switching output paths of the main optical cable and the standby optical cable.

The embodiment of the invention relates to the technical field of equipment monitoring, in particular to a factory equipment monitoring method and device. The method is applied to monitoring equipmentwhich is in communication connection with multiple sets of production equipment, and various sets of production equipment are installed in different factories; the method comprises the steps that a setting instruction for setting starting and stopping time for at least one production equipment is obtained, the starting and stopping time for the at least one production equipment is set according to the setting instruction, and then a running state time table of the at least one production equipment is obtained; the running state of the at least one production equipment is obtained in real time, and whether or not the running state of the at least one production equipment obtained in real time is matched with the running states in the running state time table is judged; a judgement result is obtained, and according to the judgement result, the at least one production equipment is adjusted or an alerting signal is output to the at least one production equipment. By adopting the method and device, the monitoring efficiency on multiple sets of production equipment can be improved.

The invention discloses an optical cable monitoring device of a tree optical cable network, which is characterized in that the device comprises a multi-wavelength OTDR module, a coarse wavelength division multiplexer, and a 1*N optical switch module; the multi-wavelength OTDR module is used for monitoring the attenuation characteristic change of an optical fiber core in an optical cable; the coarse wavelength division multiplexer is used for separating optical signals of different wavelengths; the 1*N optical switch module is used for performing physical switching or logic operation on optical signals in an optical transmission line; and the multi-wavelength OTDR module, the coarse wavelength division multiplexer and the 1*N optical switch module are connected in sequence. With the device, fault monitoring of the whole tree optical cable network can be realized by monitoring one optical fiber in the tree optical cable network only. The device has the advantages of low cost, high operability, and flexible use.

The invention discloses a fuel oil detecting device. The fuel oil detecting device comprises a pipeline, wherein a pressure sensor and a flow sensor are installed on the pipeline; the middle of the pipeline is a U-shaped section; two sides of the pipeline are a first horizontal section and a second horizontal section; the free end of the first horizontal section serves as an oil return pipe connecting end; a gas quick connector is arranged at the free end of the second horizontal section; probes of the pressure sensor and the flow sensor enter an oil path and are connected with a data acquisition processor, a data display and an alarm through conducting wires to form an operating circuit. The fuel oil detecting device realizes lubricating pipeline fault monitoring by monitoring the pressure and the flow value in the pipeline and performing simple operation processing, is relatively low in investment and maintenance cost, and has a high practical value.

The invention provides a small-sized double-rotor fault simulation experiment table and a fault diagnosis simulation method. The experiment table comprises two main components. The first part is an upper mechanical part, and the second part is a lower embedded control part. The mechanical part is mainly composed of double rotors rotating independently and a case simulating faults, and the embedded control part is composed of a vibration acceleration sensor, a rotating speed sensor and all modules. Wherein the lower embedded control part can realize communication with a matched upper computer, and data processing and analysis are realized by adopting a fault diagnosis method based on variational embedded multi-scale permutation entropy (veMPE).

The invention discloses a cloud-terminal fused intelligent drive-by-wire chassis health monitoring system and method. The system comprises a cloud data terminal and a drive-by-wire chassis terminal, wherein the drive-by-wire chassis terminal comprises a drive-by-wire driving system, a drive-by-wire steering system, a drive-by-wire braking system and a vehicle device. Whether parts are damaged or not is judged by detecting the states of key parts of the drive-by-wire chassis such as a hub motor, a steering gear, a torsion bar and a steering pull rod in real time, abnormal data are diagnosed online through the cloud data terminal, and health monitoring is conducted on damage of the automobile drive-by-wire chassis.

The invention provides a photovoltaic energy storage system and a fault recording device. The fault recording device is applied to a photovoltaic energy storage system. The fault recording device comprises a first fault recording unit and a second fault recording unit, wherein the first fault recording unit is arranged in an energy storage converter of a photovoltaic energy storage system and is used for storing fault data at the AC-DC side of the energy storage converter; and the second fault recording unit is arranged in the DC confluence protection cabinet of the photovoltaic energy storagesystem and is used for receiving preset sampling data in real time and recording and storing the fault data when the preset sampling data has fault data, wherein the preset sampling data comprises the sampling data of each device to be analyzed in the photovoltaic energy storage system. According to the scheme, the fault monitoring in the preset range for the whole photovoltaic energy storage system can be achieved; and moreover, in the preset range, if the preset sampling data has the fault data, the waveform data of other preset nodes in the photovoltaic energy storage system can be recorded, and the data volume for fault analysis is increased.

The invention relates to the technical field of cable fault monitoring, in particular to a cable joint monitoring system based on a multi-parameter sensing explosion-proof box. An acquisition module is arranged in the explosion-proof box and is connected with a processing module through a transmission module, and the acquisition module comprises a temperature sensor and a pressure sensor, which are respectively used for acquiring the surface temperature of the cable joint and the pressure in the explosion-proof box; the communication data line is connected with the acquisition modules and the converter, and the wireless transmitter and the wireless receiver are respectively connected with the converter and the upper computer. The explosion-proof box is arranged at a cable joint section to ensure the safety of a cable joint, and the electronic tag and the sensor arranged on the explosion-proof box are matched to monitor the temperature, the pressure and the physical position characteristic quantity of the cable intermediate joint, so the middle box body and the end box body of the fault monitoring explosion-proof box for sensing the multi-parameter state of the joint are connected through the flexible part; therefore, the cable bending device can meet the requirement for the bending environment of on-site cables, and is easy to mount and dismount, convenient to operate and high in on-site applicability.

The invention discloses a device for remotely monitoring oil quantity in a pipeline in real time and a working method thereof, relating to a flow monitoring technology. The device for remotely monitoring the oil quantity in the pipeline in real time comprises a flow sensor unit, a signal transmitting unit and a signal processing unit, wherein the signal processing unit is positioned in a monitoring room; the flow sensor unit and the signal transmitting unit are mainly used for tracking and detecting the magnitude of petroleum flow in an oil pipe in real time and transmitting acquired information wirelessly; and the signal processing unit is mainly used for acquiring and processing information output by each signal transmitting unit positioned on an oil well field, and transmitting the information to a computer. The device has the advantages of low cost, high signal transmission reliability and no limit on the monitoring room for accommodating the computer and the signal processing unit by the position of the monitored pipeline.

The invention relates to a Beidou broadcast ephemeris maneuvering fault monitoring method considering parameter sensitivity, and belongs to the technical field of satellite navigation. The method specifically comprises the following steps of: 1, analyzing the sensitivity of satellite position errors to broadcast ephemeris parameter changes; and 2, measuring the orbit error in the sight distance direction of the satellite by adopting pseudo-range difference, measuring the orbit error orthogonal to the sight distance direction by adopting double-difference carrier phase, and constructing an observation equation about the position error of the satellite. According to the method, the orbit error is measured in a pseudo-range and carrier phase observed quantity combined mode, sensitivity analysis of the satellite position error on broadcast ephemeris parameter changes is fully utilized, an observation equation related to the satellite position error is converted into an observation equationrelated to broadcast ephemeris parameter deviation, higher observation precision is obtained, the ambiguity resolving complexity in carrier phase observation is reduced, a monitoring model can be built, and Beidou broadcast ephemeris maneuvering type fault monitoring can be achieved.