122results about How to "Troubleshoot the problem" patented technology

The invention relates to a power-on self-repairing method for a brushless direct-current motor hall sensor. The hall sensor is detected in real time, and change-over is carried out in a signal estimating mode during a fault determining period, so that influences of a detection process on performance of a motor are emitted after faults occur. After the faults are detected and determined, a fault operation mode is switched, and the problem that system faults are caused due to the fact that the hall sensor is suddenly damaged in the operation process of a brushless direct-current motor is eliminated. Meanwhile, signals of the damaged hall sensor are repaired as much as possible through undamaged hall sensors to guarantee that the motor normally runs under sudden failure, and stability and safety of a system are enhanced. By means of the method, fault detection, judgment and repairing of the hall sensor in the running process of the motor can be achieved, and the problem that the system faults are caused due to the fact that the hall sensor is suddenly damaged in the operation process of the brushless direct-current motor is solved.

The invention discloses a heat dissipation method. The method is applied to the mobile terminal. A heat dissipation channel is arranged in the mobile terminal. a heat dissipation device is arranged inthe heat dissipation channel; The casing of the mobile terminal is provided with a heat dissipation hole communicating with the heat dissipation channel, and the casing is also movably connected witha baffle. The method comprises the steps that if it is detected that the heat dissipation device starts the heat dissipation function, the baffle covering the heat dissipation hole is controlled to move by a preset distance according to preset conditions, and therefore the heat dissipation hole is exposed or partially exposed; and if it is detected that the heat dissipation device closes the heatdissipation function, the baffle is controlled to move to cover the heat dissipation holes. The invention also discloses a mobile terminal and a computer readable storage medium. Dust accumulation ofthe heat dissipation holes can be reduced, the problem of terminal faults caused by dust accumulation of the heat dissipation holes is solved, the service life of the terminal equipment is prolonged,and the user experience and the user viscosity are improved.

The embodiment of the invention provides a terminal access control method, a controller, management and control equipment, access equipment as well as a system. The method comprises the following steps: after an Internet of Things terminal is accessed to a network, an ARP message is submitted to an SDN controller to be managed and controlled, the SDN controller examines and approves according to identification of the Internet of Things terminal and issues a terminal access control table generated according to a legal terminal to the management and control equipment, and the management and control equipment performs network access control on the Internet of Things terminal only according to the terminal access control table, so that a terminal which is not examined and approved is blocked from being accessed to a network, the problem that a network fault is caused due to long period and complex configuration operation when a newly added Internet of Things terminal when is accessed to the network and on line, and by simplifying a process that the Internet of Things terminal is accessed to the network and is examined and approved, network access efficiency of the Internet of Things terminal and safety protection on the Internet of Things terminal are improved, and network maintenance cost is reduced.

The invention provides a printing head cleaning device for a 3D printer. The printing head cleaning device comprises a cleaning pond (1) and a rotating shaft (5) rotatably supported in the cleaning pond (1), wherein the rotating shaft (5) is provided with windshield wiper plates (7) which are uniformly arranged outside the rotating shaft (5) at equal intervals and can rotate around a rotating axial line of the rotation shaft. The printing head cleaning device can be used for at least effectively cleaning impurities on the printing head regularly in a printing process of the 3D printer.

The invention relates to a decentralized direct and alternating current hybrid system energy storage SOC control method, and belongs to the converter control technology in the field of power electronics. According to the invention, the method is applied to the direct current energy storage converter, the alternating current energy storage three-phase converter and the bidirectional power flow controller of the direct and alternating current hybrid system and is suitable for the island micro-grid topology of the energy storage battery in the direct and alternating current sub-network. Accordingto the method, the alternating current side bus frequency signal and the direct current side bus voltage signal carry the SOC information of the alternating current side energy storage and the directcurrent side energy storage respectively, the SOC management of the two sides of the energy storage is realized through the coordination control algorithm, which effectively avoids the condition thatthe direct and alternating hybrid micro-grid system crashes due to overcharging over-charging of the single-side energy storage. Meanwhile, the method can realize the control of the power flow controller by utilizing the local information, does not need communication cables, and effectively saves the communication cost.

The invention discloses an FPGA-based dual-system control device and method for a brushless DC motor and belongs to the field of motor control. The device comprises an FPGA, a brushless DC motor, a drive circuit, a voltage and current sampling circuit, an indicator light LED1, an indicator light LED2 and an indicator light LED3, wherein the FPGA is connected with the brushless DC motor through thedrive circuit and the voltage and current sampling circuit separately; the indicator light LED1, the indicator light LED2 and the indicator light LED3 are arranged on the FPGA; and the brushless DC motor is provided with a hall sensor. The method comprises the steps as follows: a position sensor system and a position-sensorless system are adopted; when a detection module detects that an error occurs in a hall signal, a back electromotive force zero-crossing system runs for motor control and the brushless DC motor continues to run; and when the detection module detects that two sets of controlsystems for the brushless DC motor go wrong, the LED lights on the FPGA send out corresponding indication signals and timely prompt the staff to deal, thereby ensuring that the motor can safely and efficiently run. The problem of a failure of the hall sensor is effectively solved.

The invention discloses a power supply safety protection system. A fault prediction circuit receives a voltage signal of a main power supply phase line L induced by a voltage transformer, a voltage change rate is calculated when the voltage signal exceeds an allowable deviation for 7%, and a failure is predicted when the voltage signal exceeds an allowable deviation for 9%. At that time, in one path, a normally closed switch K1-1 is controlled to be delayed and switched off, a normally closed switch K1-2 is switched on, a main power supply is delayed and switched off, and a charge storage pumpcircuit temporarily supplies power to a load. In another path, a normally closed switch K2-1 is controlled to be delayed and switched off, and a backup power supply is started. When the fault prediction is normal, the charge storage pump circuit allows the charging of an energy storage circuit and electric energy storage, the voltage is transformed into AC220V by a boosting circuit, and the loadis powered when the failure of the main power supply is predicted. A short circuit determination circuit detects current flowing through the load through a current transformer, when short circuit occurs, transistors Q3 and Q4 form a composite tube for conduction, a relay K3 coil is energized, both normally closed contacts K3-1 and K3-2 are disconnected, and the main power supply, the backup powersupply and the charge storage pump circuit do not supply power to the load.

The invention provides a method and system for overload protection in the transformer substation self-switching matching process. Power grid device parameters, the topological connection relation, real-time operation data and a self-switching device matching rule are comprehensively considered, the power grid topological change generated after N-1 times of calculation is accurately judged, and an operation result is obtained through a trend algorithm. When the operation result shows that a transformer substation is overloaded, a load is transferred; when the transformer substation is not overloaded, rehearsal is conducted. Thus, the transformer substation can be effectively prevented from being overloaded, the problem that the transformer substation breaks down due to the fact that the transformer substation is overloaded is solved, a plan result of the transformer substation can meet the actual operation condition, and accuracy and practicality of calculation are improved.

The invention discloses a high-reliable fault-tolerant system based on a bus network. The fault-tolerant system comprises a simulation IO (Input Output) control module, an interface and switching module, an onboard flight control and integrative computation module, a high-performance processing module, a digital IO control module, a router module, and dual-redundancy isomorphic modules corresponding to above six modules; the six modules and the corresponding dual-redundancy isomorphic modules compose four network connections to realize the dual-redundancy hot backup; and thus, the fault-tolerant capacity of the dual-redundancy system is improved through the dual-ring topological structure by using the SpaceWire interconnected bus architecture. Based on a plurality of point-to-point bus interconnected bridge connections, the fault-tolerant system provided by the invention realizes the faster and stronger system fault-tolerant capability by using the dual-ring topological structure.

The invention provides a chip package and a method for forming the same. A chip package including a substrate is provided. A sensing region or device region of the substrate is electrically connected to a conducting pad. A first insulating layer is disposed on the substrate. A redistribution layer is disposed on the first insulating layer. A first portion and a second portion of the redistribution layer are electrically connected to the conducting pad. A second insulating layer conformally extends on the first insulating layer, and covers side surfaces of the first portion and the second portion. A protection layer is disposed on the second insulating layer. A portion of the second insulating layer is located between the protection layer and the first insulating layer. The quality and the reliability of the chip package can be greatly improved.

The embodiment of the invention discloses a control method and device used for banknotes and a banknote box. The control method used for the banknotes includes the following steps that the shielding time length for which a portion of a preset position is shielded when first banknotes enter the banknote box; if the shielding time length is longer than a time length threshold, a startup signal indicating that a push plate in the banknote box moves downward to the portion, not shielded continuously, of the preset position is generated. According to the control method and device used for the banknotes and the banknote box, the problem that a fault occurs due to an error of the banknotes thickness judgement based on the number of the banknotes when an existing banknote box receives or sends the banknotes is solved, and the defect that due to the old and new degree and fluffy degree difference of the banknotes, a gap between each two received banknote is too wide or too narrow and thus banknote dispensing can not be conducted when money is withdrawn a machine again is avoided.

The invention provides a dedusting hopper for a feeding port. The hopper includes a hopper frame, a lower hopper, a pulse dedusting chamber, a fan, a climb ladder, an upper hopper, an air compressor and an electronic control device, wherein the lower hopper, the upper hopper and the climb ladder are all arranged on the hopper frame; the pulse dedusting chamber is arranged on the outer periphery, above the lower hopper, of the upper hopper, and the upper hopper, the pulse dedusting chamber and the lower hopper are connected integrally; an inner platform is arranged between the upper hopper and the lower hopper. According to the dedusting hopper, the lower hopper is used as the dust collecting hopper of the pulse dedusting chamber so as to solve the problem that it is inconvenient to directly feed from the dust collecting hopper; by arranging the inner platform, the replacement and installation of a dedusting cloth bag and a cloth bag cage inside the pulse dedusting chamber can be completed inside the pulse dedusting chamber, which greatly saves the replacement time and reduces the labour intensity; the dedusting hopper has the advantages of a simple structure, easy installation, a good dedusting effect, convenient maintenance and installation, low operation costs, stronger practicality and more convenience.

The invention relates to a wireless transmission system for pressure signals of a gap of a brake shoe and pressure signals of a butterfly-shaped spring. The wireless transmission system comprises a disc-shaped brake shell, a wireless transmitter, a brake gap sensor and a butterfly-shaped spring pressure sensor, wherein a butterfly-shaped spring is arranged in the disc-shaped brake shell; the wireless transmitter is fixed in the center of the disc-shaped brake shell and is respectively electrically connected with the brake gap sensor and the butterfly-shaped spring pressure sensor; the brake gap sensor is arranged on the outer side of the disc-shaped brake shell; and the butterfly-shaped spring pressure sensor is abutted between the butterfly-shaped spring and the inner wall of the disc-shaped brake shell. The wire transmission system for the pressure signals of the gap of the brake shoe and the pressure signals of the butterfly-shaped spring is reasonable in structure and convenient to operate, is safe and reliable, and can monitor the pressure signals of the gap of the brake shoe and the pressure signals of the butterfly-shaped spring in real time; and problems that the brake shoes are out of order due to the pressure of the gap of the brake shoe and the pressure of the butterfly-shaped spring, so that a lifting machine is failed are solved.

The invention discloses a solid power semiconductor field effect transistor structure. Through special design, no any parasitic triode exists in the solid power semiconductor field effect transistor structure, thereby solving the problem that a device fails due to secondary breakdown or latching under transient conditions. The firmness of the device is enhanced.

The invention discloses a sealed cover press-installing device of a railway truck bearing. The device is a sleeve-like structural component with a cylindrical outer circumference surface, and comprises an upper guiding section and a lower installation section, wherein the diameter of the inner circumference surface of the guiding section is small, the diameter of the inner circumference surface of the installation section is large, and a step surface is transited between the inner circumference surface of the guiding section and the inner circumference surface of the installation section, and the length of the installation section is one fifth of the length of the whole press-installing device; the inner circumference surface of the guiding section comprises an upper reshaping surface and a lower leading surface, wherein the reshaping surface is a circular conical surface of which the upper diameter is small and the lower diameter is large, the leading surface is a cylindrical surface, and the diameter of the leading surface is larger than the diameter of an upper tooth port of an outer ring of the bearing by 0.27-0.63mm; and the diameter of the inner circumference surface of the installation section is larger than the diameter of the outer ring of the bearing by 0.22-0.59mm. The press-installing device disclosed by the invention can avoid a phenomenon that when a sealed cover is in press installing, a boss of the sealed cover is subjected to edge cutting.

The invention discloses a base station identity determining method and a base station identity determining device. The base station identity determining method comprises the following steps: a first base station acquires the tracking area identity of a second base station when detecting a first communication signal sent by the second base station; the tracking area identity of the first base station is determined according to the tracking area identity of the second base station; and a second communication signal including the tracking area identity of the first base station is sent to user equipment. By adopting the method and the device of the invention, the problem that a communication network may fail easily as the tracking area codes of all base stations are set by network equipment in the prior art is solved. Furthermore, the operation stability of the communication network is improved, and the burden on network equipment is reduced.

The invention discloses a kitchen sewage treatment device and belongs to the field of sewage treatment. In a filter device, when more impurities available in the filter screen are in contact with thebottom of an inductor in a filter chamber, an automatic induction door will be opened automatically to deslag and a mobile device will pull out the filter screen to shake and deslag; meanwhile, oil inthe kitchen sewage is removed by means of an electrolytic process; and electrolysis of water is performed by means of a power supply, so that water generates air bubbles, and oil is adsorbed to the air bubbles to gradually form oil residues which float on the water surface to be fished out. Meanwhile, gas generated by electrolysis is conveyed to a treatment chamber through a ventilating pipe, sothat suspended solids in water can be in full contact with a flocculant so as to form large suspended solid flocs, and therefore, the effluent quality is improved; and therefore, resources are utilized, so that the environmental pollution generated by gas is also avoided. The device provided by the invention solves the problems that the filter system fails as the filter screen is often blocked during filtration when sewage and solid dirt are filtered and separated by using the filter screen, and the deoiling effect is not good.

The invention provides a cooling liquid flow monitoring method and a liquid cooling electric drive system. By obtaining the temperatures of the two reference points in the liquid cooling electric drive system and the power consumption loss of a power module, the flow of the cooling liquid flowing through the power module can be obtained, and the problems that an existing vehicle provided with theelectric drive system cannot obtain the actual flow of the cooling liquid and is prone to cooling abnormity, and consequently the system faults are caused, are solved. Furthermore, by calculating thetemperature detection values of the two reference points in the liquid cooling electric drive system and the power consumption loss of the power module, the physical sensors, such as a flow sensor, etc., do not need to be additionally arranged on the liquid cooling electric drive system, the product cost is not increased, the problems caused by scattering difference and faults of the physical sensors are also avoided, and the reliability is high.

The invention provides a welding pipe cutting machine for preventing vertical shaking of welding pipes, and relates to the field of welding pipe cutting. The welding pipe cutting machine for preventing vertical shaking of the welding pipes comprises a console; one side of the top of the console is fixedly connected with a fixed table; the top of the fixed table is fixedly connected with a first motor; the first motor is provided with a first rotating shaft; one side, far from an output end of the first motor, of the first rotating shaft is fixedly connected with an electric extension rod; a free end of the electric extension rod is fixedly connected with a cutting blade; the left side of the fixed table is fixedly connected with a controller; the right side of the fixed table is fixedly connected with a clamping device; the clamping device includes a box body; and one side of the top of the inner wall of the box body is fixedly connected with a second motor. The welding pipe cutting machine for preventing vertical shaking of the welding pipes prevents the welding pipes from vertically shaking during cutting, prevents damage of the cutting blade due to collision caused by vertical shaking of the welding pipes, improves the production efficiency, and prevents economic loss of users.

The invention discloses a method for monitoring a multi-machine distributed replicated block device and equipment and aims to achieve a purpose of timely finding out malfunction of a host node in a distributed system. Firstly, a storage node of a node type is predefined in the distributed system, and a current node type status of the storage node is acquired through access to a client-side system status file, wherein the node type comprises the host node and a standby node. Secondly, when the predefined node type is the host node and the acquired current node type status is the standby node or the predefined node type is the standby node and the acquired current node type status is the host node, faulty information of the host node is returned.

The invention relates to a power supply line fault monitoring device which comprises a microprocessor, a signal collection module and a communication circuit. The signal collection module is composed of a photoelectric coupler, a photoelectric coupler input end current-limiting resistor, a photoelectric coupler output end current-limiting resistor and diodes. When a power supply line works normally, frequency signals are monitored by a monitoring pin of the microprocessor, and therefore whether the power supply line has faults or not is deduced. According to the power supply line fault monitoring device, automatic monitoring and remote alarming of the faults of the power supply line are achieved, the device has the advantages of alarming the faults in time and being high in working efficiency, low in maintenance cost and capable of improving intelligent degree of monitoring of the power supply line.

The invention provides a redundancy control circuit and a redundancy control system and aims to solve the problems that as unstable factors in a cooling water system in the prior art cause abnormal cooling water supply, an air compressor system shuts down due to sharp raise of temperature, and the heavy losses of a production line is caused. The redundancy control circuit comprises a first branch circuit, a second branch circuit, a third branch circuit, a fourth branch circuit, a fifth branch circuit, a sixth branch circuit, a seven branch circuit and an eighth branch circuit, wherein the first branch circuit is connected with the second branch circuit in parallel, then is connected with the eighth branch circuit in series, then is connected with the third branch circuit and the fourth branch circuit in parallel, and then is connected with the normally closed contact (KH01) of a first thermal relay in series to form a first loop; the fifth branch circuit is connected with the sixth branch circuit in parallel, then is connected with the normally opened contact (KH02) of the first thermal relay in series to form a second loop; the first loop, the second loop and the seventh branch circuit are connected into a power supply main circuit in parallel. The scheme provided by invention is low in cost and safe and reliable, solves the problem that a cooling water pump and an electronic control system go wrong in the running process of an air compressor, and avoids the unplanned shutdown of production equipment.

The invention is suitable for the field of vacuum degree detection, and provides an automobile brake booster vacuum degree sensor comprising a first chamber, a second chamber and a third chamber, wherein the first chamber is communicated with the second chamber through an airflow channel, and the second chamber is electrically connected with the third chamber through a PIN pin; a PCB which is connected with the side wall of the second chamber in a sealing way; a membrane, a pressure sensor and a sealing washer which are arranged below the PCB in a compressing way, wherein the sealing washer, the pressure sensor and the PCB are respectively provided with a first through hole, a second through hole and a third through hole, the sealing washer and the convex airflow channel are cooperativelyfixed on the bottom part of the second chamber through the first through hole, the second through hole, the third through hole and the airflow channel are arranged on the same straight line, and the membrane is arranged on the connecting part of the second through hole and the third through hole; and a cover plate which is arranged on the PCB, wherein the cover plate is provided with a fourth through hole, and the internal side of the fourth through hole is provided with a waterproof ventilated membrane. The pressure sensor SMT is arranged on the PCB to form the PCBA, the conventional gluing mode is changed and effective sealing of the chip and the manifold can be guaranteed through interference preloading of the PCBA and the sealing washer.

The invention discloses a data forwarding method and apparatus of a cloud computing platform. The method comprises the following steps: when the data size of data being processed by a security protection node exceeds a preset data size threshold, separating to-be-processed data of the security protection node; respectively establishing forwarding paths for the separate data, wherein the forwardingpaths comprise a forwarding path passing through the security protection node and a forwarding path not passing through the security protection node; configuring corresponding flow tables according to the forwarding paths; and issuing the flow tables to a switch to indicate the switch to forward the corresponding separate data according to the flow tables. By adoption of the technical scheme provided by the invention, a fault of the security protection node can be avoided, the serviceability of the service can be guaranteed, and the loss of a user can be reduced.

The invention discloses an Internet of Things temperature sensor device with an alarm mechanism, wherein the device comprises a temperature sensor body, a temperature detection alarm device is disposed in an inner cavity of the temperature sensor body, a height lifting adjustment device is disposed on the surface of the temperature sensor body, and an alarm is disposed on one side of the height lifting adjustment device; and a sliding groove is fixedly formed in the inner wall of the lower end of the temperature sensor body, and the temperature sensor body and the surface of a sliding plate are fixedly mounted through a clamping ring. The invention relates to the temperature sensing technology field of the Internet of Things. According to the Internet of Things temperature sensor device with the alarm mechanism, the problems that no alarm device exists, when a temperature sensor is used for detection, the internal temperature of the temperature sensor is too high, electrical apparatuselements in the temperature sensor are influenced, and consequently the temperature sensor breaks down are solved; in addition, the problem that when the temperature sensor is mounted, the temperaturesensor is fixed, consequently the height of the temperature sensor needs to be adjusted in the later period, and disassembly and reappearance installation are needed is solved.

The invention relates to an intelligent laundry control system comprising an MCU module, a power supply module, a driving module, IC swiping module, a GPRS communication module, a control server, a WEB server, an intelligent terminal and a two-dimensional code tag. The invention aims at providing a code scanning payment system, a code scanning module and a washing machine driving module are integrated and fused, so that the problem that washing machine fault cannot be accurately obtained by an existing code scanning washing machine, and maintenance labor cost is reduced. In addition, code scanning payment and one-card payment are fused so as to solve the problem that an existing one-card cannot be well fused with a self-service washing machine. Furthermore, the fuzzy control theory is fused into a laundry expense calculating process, various parameters of the laundry process are quantized and input into the calculating process, and expenses of the laundry control system can be accurately controlled.

The invention discloses a double-shaft input hybrid power system and a drive method. The double-shaft input hybrid power system comprises an engine, a second shaft, a shaft P3 and a third shaft. The second shaft, the shaft P3 and the third shaft are in transmission connection through a gearbox. A first shaft is connected to one side of the engine, a clutch is installed between the first shaft andthe engine, a transmission gear is installed on the first gear, a main speed reducer is installed at one end of the second shaft, a synchronizer is installed on one side of the main speed reducer, a first-gear gearshift gear is installed between the first shaft and the second shaft, an L-gear gearshift gear and an H-gear gearshift gear are installed between the third shaft and the shaft P3, a motor is installed on the shaft P3, and an axle shaft is connected between the shaft P3 and the second shaft and provided with a differential mechanism. A mode P2 and a mode P3 can be achieved through coupling of one motor, a large amount of cost can be saved, it can be guaranteed that an original vehicle still can travel normally after the motor breaks down, and the vehicle charges a battery in an idling state.

The invention discloses a high pressure casing sensor and a testing method thereof. The high pressure casing sensor comprises a housing and a slide block arranged in the housing, and further comprises a grounding connecting base arranged in the housing, the grounding connecting base and the housing enclose a closed ground loop, the outer side of the grounding connecting base is provided with a signal collection device, and the lower portion of the grounding connecting base is provided with a connecting device; a spring is arranged between the slide block and the grounding connecting base, and the outer side of the spring is provided with an insulating cylinder. According to the high pressure casing sensor with the structure and the testing method thereof, reliable grounding of a casing end screen is ensured by adopting the full-closed ground loop, the arranged grounding connecting base can ensure monitoring equipment safety and personal safety, meanwhile capacity of resisting disturbance is improved, the service life is prolonged, and the cost is saved.

The invention belongs to the technical field of compressors, and particularly relates to a piston assembly and application thereof. In an actual production process, the phenomena of poor final centering between a piston and a piston cylinder, eccentric wear of the piston and sealing failure due to insufficient machining precision easily occur. The piston assembly provided by the invention comprises a crosshead component, a piston component and a middle body component, wherein the piston component comprises a piston rod; one end of the piston rod is connected to a crosshead and a displacement component is arranged at a joint of the two, so that the piston rod has a certain radial displacement; and the other end of the piston rod is connected to the piston in a joint mode, so that the pistonrod has a certain deflection, and good centering between the piston and the piston cylinder is guaranteed. A piston pull-back rod is arranged at the end, connected to the piston, of the piston rod, and when the intake pressure is too small to push the piston to move downwards or the piston is blocked, the piston pull-back rod can pull the piston to continue to do regular reciprocating motion.

The invention discloses a transmission line mechanical deicing sequence optimizing method based on differential evolution algorithm, comprising the following steps: first, generating a population; then establishing a fitness function and formulating a differential evolution algorithm strategy; and finally generating a deicing sequence generation and optimization process. The method of the invention can solve the problem that the de-icing sequence of a currently available mechanical de-icing process is not considered, which causes the pole tower to bear imbalance force exceeding the designed strength of the pole tower and causes the pole tower malfunction. The method strikes a balance between the pole tower safety and the deicing route and ensures that the force exerted on the line and the pole tower does not go beyond the safety threshold and that the deicing route is the smallest when mechanical deicing work is performed according to the optimized deicing sequence.