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

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 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 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 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 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 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 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 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 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 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.