44results about How to "No reduction in reliability" patented technology

The invention discloses a protection circuit suitable for an initiating explosive device on a two-stage ignition bomb. The protection circuit belongs to the technical field of safety protection of the initiating explosive device on the bomb, and solves problems of delayed explosion and poor direct protectiveness of the initiating explosive device caused by a safety protection mode of the conventional initiating explosive device on the bomb. The protection circuit comprises a protection control relay, a protection state detection circuit and a ground control circuit; one end of the protection control relay is connected with a negative power supply end Q of an ignition power supply; the other end of the protection control relay is connected with a negative activating end T of the initiating explosive device; a control signal input end of the protection control relay is connected with a control signal output end of the ground control circuit, and the control signal output end of the protection control relay is connected with the control signal input end of the protection state detection circuit. The protection circuit is suitable for safety protection of the initiating explosive device on the two-stage ignition bomb.

The invention discloses a wireless communication device testability design method. The method includes performing functional unit division on a wireless communication device, including a voice and panel unit, a processor unit, a baseband signal processing unit, a radio frequency unit, a power amplifier unit, a filter unit and a backboard unit, wherein the voice and panel unit, the baseband signal processing unit, the radio frequency unit, the power amplifier unit and the filter unit are connected with the processor unit through respective control interfaces and data communication interfaces via the backboard unit, and the voice and panel unit provides a device internal unit program upgrade interface and maintenance interface to the outside. Main faults of each unit are automatically diagnosed when the device is powered on, a test command is input through the maintenance interface when a fault occurs, a test signal passes through each unit inside and realizes loopback gradually, and the faults of each unit are diagnosed automatically. The wireless communication device testability design method has the beneficial effects of utilizing hardware resources of the device itself, increasing test software to realize testability design of the device itself, accurately positioning the faults inside the device, and greatly reducing debugging and testing and maintenance guarantee cost of the device.

The invention relates to a method for vacuum degree measurement and life management of a vacuum arc extinguish chamber, which is based on an expert system in electric grid. The invention comprises anexpert system main module, a residual life predicating module and a life management module, a vacuum degree measurement device by a magnetic control method, and a vacuum degree measurement device by ashielding case potential method, wherein the expert system main module is respectively connected with the residual life predicating module and the life management module, and the vacuum degree measurement device by the magnetic control method and the vacuum degree measurement device by the shielding case potential method. The data measured on line by the vacuum degree measurement device by the magnetic control method and the vacuum degree measurement device by the shielding case potential method is provided to the expert system which provides results and outputs life management information based on a reliability knowledge base of the measured data. In the invention, the vacuum degree in the vacuum arc extinguish chamber can be measured in the power grid, and also the residual life can bepredicated and off-line monitoring can be realized so as to avoid the reduction of reliability coefficient of a powder system due to the access of on-line measurement equipment, thereby meeting the requirement of switch electrical applicance state examination, and realizing the intelligentizing of a vacuum switch.

The invention discloses an unmanned-aerial-vehicle height measurement control system based on fault-tolerance processing and a control method. The unmanned-aerial-vehicle height measurement control system comprises a height meter module, a satellite navigation module, an inertial measurement module and a computing and processing module. The height meter module is used for measuring the distance of an unmanned aerial vehicle to the ground in real time; the satellite navigation module is used for receiving and processing satellite signals in real time and measuring the flight position and the direction of the unmanned aerial vehicle; the inertial measurement module is used for measuring the attitude angular velocity and the accelerated velocity of the unmanned aerial vehicle in real time; the computing and processing module is used for receiving data of the height meter module, the satellite navigation module and the inertial measurement module in a parallel mode and computing and obtaining height measurement data. By means of the unmanned-aerial-vehicle height measurement control system based on fault-tolerance processing and the control method thereof, the conditions of the fault of a height meter or the fault of satellite navigation or the faults of a height meter and satellite navigation can be synthetically processed, and the high stability of the unmanned aerial vehicle is guaranteed through the control system to a maximum limit.

A feedforward signal of a drum water level control system of a drum boiler is used for overcoming the adverse impact of false water level on water level control. The feedforward signal fL(s) is specifically formed as follow, wherein s is complex variable of Laplace transform and is equivalent to differential operator in time domain, fL(s) is Laplace transform of feedforward signal fL, pf(s) is Laplace transform of furnace pressure pf, pd(s) is Laplace transform of drum pressure pd, Cb is boiler heat storage coefficient, Kf is furnace pressure gain coefficient and T is furnace pressure filter coefficient. The invention is simple and convenient in implementation, low in cost, good in control effect and high in reliability, can effectively overcome the adverse impact of false water level and greatly improve the control quality.

The invention discloses an intelligent management system and method for illegal fee collection cheating of medical imaging equipment. The system comprises a data acquisition subsystem connected with the medical image equipment, a cloud analysis subsystem connected with the data acquisition subsystem, and a management subsystem connected with the cloud analysis subsystem. According to the system and method, the management need of illegal fee collection cheating prevention of all medical imaging equipment of a hospital can be met only by installing one data acquisition box and the total cost is less than one tenth of those of other plans in the prior art. Moreover, statistics of detailed usage records of the equipment is realized by using working logs of the equipment; the data source is direct and the result is accurate; a phenomenon that the operation of the equipment is limited by cutting of the power or signal is avoided, so that high reliability of the equipment is ensured.

The present invention relates to a test probe (1) for mating with a connector (30) in a probe insertion direction (I), comprising a housing (2), an outer contact portion (8), the outer contact portion (8) supported by the housing (2) and extending away from the housing (2), said outer contact portion (8) supported by an elastically deformable outer biasing means (21) and being adapted to be deflected substantially perpendicular to the probe insertion direction (I) and at least one contact assurance means (19), said contact assurance means (19) connecting the outer contact portion (8) electrically conductively to the housing (2). To decrease the number of parts the contact assurance means (19) has at least one contact section (19c), said contact section (19c) pressed conductively against the housing (2) by being elastically deflected.

Provided is an electric assisted bicycle with a configuration wherein a drive unit for internally combining human powered drive force and auxiliary drive force is fitted with an interior transmission with automatically switchable speed-change stages. A drive unit disposed at an intermediate position between a front wheel and a rear wheel is internally fitted with a transmission mechanism (25) that transmits combined force of human powered drive force and auxiliary drive force from a motor while changing speeds by switching the combined force to a plurality of stages. The transmission mechanism (25) is fitted with a speed-change weight (81) of which the posture is changed in accordance with a centrifugal force when being rotated, and configured such that as the rotation speed of a crank shaft (7a) increases, the posture of the speed-change weight (81) is changed so as to be switched from low speed stage side to high speed stage side.

This invention discloses a method for identifying on-line SFP electric modules, which connects the first and second test pins of a SFP module in short-circuit, when a control unit of a monoboard the SFP module places tests that the module has been plugged in the monoboard, said method includes the following steps: A, the control unit transmits a preset test signal to the first test pin of the SFP module by the pin of its own transmitting test signals, B, the control unit receives the fed back signals from the second test pin of the module by its pin receiving test signals and judges if said fed back signal is the preset signal, if so, it judges that the SFP module plugged in the monoboard current is an electric module, otherwise, it's not.

The invention discloses a high-voltage circuit-breaker condition monitoring method of a distribution automation system. Through the opening/closing command issuing moment recorded by a terminal device of a power distribution station automation system and a load current change process during the opening/closing operation of a high voltage circuit breaker, the load current dynamic data during the opening/closing of the high voltage circuit breaker can be utilized to calculate the opening/closing completion moment of the high voltage circuit breaker, so that the opening/closing time of the high voltage circuit breaker can be determined according to the recorded opening/closing command issuing moment and the opening/closing moment of the high voltage circuit breaker, and the state of the high voltage circuit breaker can be assessed according to whether the opening/closing time of the high voltage circuit breaker reaches the standard. The method can perform state monitoring of the terminal high voltage circuit breaker of the distribution automation system on the existing basis of the distribution automation system without increasing hardware equipment, so that the method is good in economy, and the operation reliability of the high voltage circuit breaker of the distribution automation system can be enhanced.

The invention discloses a distributed redundant control system. According to the system, pump revolution speed is dynamically adjusted based on the pressure, flow, temperature and other variables of fluid so as to achieve an expected control objective. The product is composed of one central management and coordination unit and n distributed control units which are independent and redundant from one another and can run autonomously, wherein each unit is in whole-network information transmission and modular design; the central management and coordination unit is only responsible for managing andcoordinating the control units, and the right of control is handed over to each control unit; and the central management and coordination unit can perform cascading in the same network segment or across network segments. In a pressure-maintaining standby state based on a multi-variable weight algorithm, the system does not do idle work due to dynamic flow compensation. The system has the advantages of high reliability, high continuity, distributed running, strong extensibility and energy preservation, therefore, the defects that through a traditional central control mode, reliability is poor,and equipment overhaul requires shutdown and water supply cut-off are overcome, and the problems that water supply continuity is not high, and the scale is not large in the industry are solved. In this way, the after-sales service pattern in the current industry is changed, and after-sales cost is greatly lowered.

The invention provides a broadband acoustic metamaterial. The broadband acoustic metamaterial comprises: a grating plate with a plurality of hollow parts; an elastic film which is tensioned and fixedon the grating plate, wherein the first surface of the elastic film is attached to the grating plate; a plurality of mass blocks fixed on the second surface of the elastic film, each mass block facingone hollow part of the grating plate. The periphery of each mass block is surrounded by multiple rigidity control blocks, and each rigidity control block is fixed to the second surface of the elasticfilm. The problem that an effective sound insulation band of an existing acoustic metamaterial is narrow is solved, and the sound insulation and noise reduction effects of the acoustic metamaterial are improved.

The invention relates to a pressure balance retainer for an underwater oil charge system, comprising a seawater pressure sensing transfer unit and an oil pressure rapid automatic compensation unit, wherein the seawater pressure sensing transfer unit comprises an upper shell, a lower shell, a spring, a rolling membrane, a piston, a piston rod and an oil pressure control rod which are coaxially arranged; the upper shell is fixedly connected with the lower shell, the lower shell is provided with through holes, the rolling membrane is arranged between the upper shell and the lower shell through the spring and a fixed plate, the piston is arranged above the rolling membrane, and the piston rod is lockedly connected with the oil pressure control rod; the top end of the lower shell is hermetically fixed on the oil pressure rapid automatic compensation unit; and the oil pressure rapid automatic compensation unit comprises an oil charge valve for realizing the open and close of an oil charge oil circuit by the movement of the oil pressure control rod. According to the invention, the pressure balance retainer disclosed herein can automatically compensate the oil charge system, and can guarantee the reliability of devices by the multi-layer watertight structure.

The invention discloses a sealing device for a tube sheet and a heat exchange pipe of a graphite pipe type heat exchanger and aims to solve the problems that by an existing sealing device, threads on sealing holes are easy to damage, a sealing structure and a mounting process are complicated, radial gaps cannot be complemented by a sealing ring and the like. The sealing device is provided with an inner sealing ring (3), a metal casing (2) and an outer sealing ring (4) from inside to outside, the metal casing is provided with an inner side plate (21) and an outer side plate (22) from the inside to the outside. An annular bottom plate (23) is arranged at the bottoms of the inner side plate and the outer side plate, an annular cover plate (5) is arranged at the tops of the inner side plate and the outer side plate and provided with holes (51). A cavity is formed by the inner side plate, the outer side plate, the bottom plate and the cover plate, and expansion rubber (1) is arranged in the cavity and is water-absorbable or oil-absorbable rubber. The sealing device for the tube sheet and the heat exchange pipe of the graphite pipe type heat exchanger is mainly used for a graphite type heat exchanger in the petrochemical and coal chemical industries and the like.

The invention discloses an input method, an input device, a readable medium and an intelligent device. The method comprises steps: analyzing the input action information by an analysis program presetin the device to obtain an action instruction; the action instruction being transmitted to a preset target application program to complete input control on the target application program. The utilitymodel has the advantages of no ROOT to the intelligent terminal, no damage to the original system of the intelligent terminal, good security, low cost, convenient use and the like.

The invention relates to an X-coding extension method capable of quickly recovering and realizing load balance. The method comprises the following steps: performing coding extension based on X-coding used in various storage array systems, additionally arranging redundancy equipment, further reducing the total quantity of blocks required for single disk recovery on the premise of ensuring that double-disk error is allowed and reducing the IO bottleneck of the single disk recovery, thereby improving the system single disk recovery efficiency, shortening the reconstruction time, realizing the system load balance and finally realizing the improvement of system service quality. With respective to any single data disk error in an original system, the total quantity of fragment required for system single disk recovery can be reduced; with respective to any single disc error in the original system, the possible load bottleneck of the original system in the single disk recovery process can be eliminated, so that the load balance of the equipment is realized; by using binary AND-XOR, the update overhead of an additionally-arranged redundant disk is reduced, so that the service life of the redundant disk is prolonged.

The invention discloses an exclusive input method, an input conversion device, an input device and an intelligent terminal, wherein the input method comprises: receiving an input instruction of the input device, packaging the input instruction into an input data stream, and sending the input data stream to a first device. The input method further comprises the following steps: the first device receives the input data stream, parses the input data stream to obtain a second input instruction, transfers the second input instruction to an application program, and completes the input of the application program. The utility model has the advantages of no ROOT to the intelligent terminal, no damage to the original system of the intelligent terminal, good security, low cost, convenient use and thelike.

A pigtail-type optical receptacle is provided and includes a tubular ferrule having a through-hole extending in an axial direction, an optical fiber inserted into the through-hole such that part of the optical fiber extends outside the ferrule, a protective member covering the part of the optical fiber extending outside the ferrule, a tubular sleeve mounted on a front end side, outer surface of the ferrule, a holder tubular having holding the rear end side of the ferrule, and a tubular housing covering the ferrule and at least a portion of the sleeve. The ferrule through-hole includes first and second regions, the second region being disposed rearward of the first region, and the housing engaging the outer surface of the holder rearward of the first region. As a result, the pigtail-type optical receptacle that can be reduced in size without deteriorating reliability is provided.

The invention discloses a method for manufacturing a light-emitting diode emitting light through an electrode. According to the method, an epitaxy light-emitting structure is formed on an epitaxy of an epitaxy substrate, and a light-pervious channel manufacturing layer is formed on the epitaxy light-emitting structure; a plurality of regular light-pervious channels are formed in an electrode area of the light-pervious channel manufacturing layer by means of a mask and an ICP etching process, and the depth of the portion, undergoing ICP etching, of an electrode area allows the surface of the epitaxy light-emitting structure to be exposed; light-pervious materials are evaporated on the surface of the exposed surface of the epitaxy light-emitting structure until the light-pervious channels are filled with the materials and a light-pervious column is formed; the light-pervious channel manufacturing layer is corroded and removed, the light-pervious column is retained and the epitaxy light-emitting structure is exposed; a soldering station electrode is formed on the surface of the epitaxy light-emitting structure, and the thickness of the solder station electrode is larger than the height of the light-pervious column; the surface of a first electrode or a second electrode which serves as the soldering station electrode is under ICP etching until the upper surface of the light-pervious column is exposed; a back electrode is formed on the epitaxy light-emitting structure, and a light-emitting diode chip is formed on a split sheet. The light blocking area of the soldering station electrode can be reduced, and external quantum efficiency of the light-emitting diode can be improved.