103results about How to "Will not cause malfunction" patented technology

The invention relates to a detector for electrical fault, in particular relating to a fault detector in transmission lines. A distributed DC ground fault detector in the invention comprises a DC power supply circuit each branch of which is provided with a ground detector, the ground detector is composed of an isolated power and a detecting sub-unit, and the positive and negative buses of the DC power are connected with each branch by the isolated power; and one end of the detecting sub-unit is connected with the isolated power, and the other end thereof is connected with a DC detecting host for communication by a data transmission bus. The distributed DC ground system of the invention has higher precision for judging fault than that of a centralized DC grounding system, and can be widely used in various power systems.

The invention discloses a method and a device for storing a message to solve the problem of single node storage in the prior art. The method comprises the following steps: receiving a message addition request; selecting a storage node from a preset storage node list, storing the message; and storing the mapping relationship between the message and the storage node storing the message. The scheme can solve two problems: the first one is that when one of the storage nodes goes wrong, the message can be stored into other nodes, so that a message middleware is out of order is avoided; the second one is that if the message traffic is excessive, the storage pressure can be distributed on the plurality of storage nodes. The invention also discloses a message processing system so as to solve the problem that the storage of a message by a single node to be forwarded is likely to cause system bottleneck and processing interrupt.

An equal transmission-variation instant value differential protecting method of remote electric transmission line microcomputer includes processing voltage and current sampling values by the same low-pass filtering treatment to obtain instant values of voltage and current, using voltage mutual inductor to process current sampling value to make primary electricity of transmission line and instant value used in differential protection-calculation be basically the same as transmission-variation link if voltage mutual inductor is applied on transmission line. The protecting method for transmission line with reactor is also disclosed.

The invention discloses a low delay filter design method for sampling rate conversion in an electronic transformer. The method comprises the steps of first adopting cascade connection of an interpolator and an extractor to achieve conversion of random fraction ratio sampling frequency, enabling an anti-image filter in the interpolator and an anti-aliasing filter in the extractor to be combined into a low pass filter; then adopting a mean square error minimization standard to solve a coefficient vector of the filter, enabling a filter transmission band amplitude and a stop band amplitude to serve as constraint conditions, and enabling mean square error minimization to serve as an optimized target; and finally enabling a solving process of the filter coefficient vector based on constraint least square method design to be converted into solving of a positive definite quadratic programming problem so that the filter coefficient vector can be obtained by direct solving. According to the method, the problems that large output delay is caused in the direct linear convolution filtering process and the higher the filter order, the larger the group delay are solved, and rapidity of protection action is greatly improved.

The invention belongs to a wet material granulation principle and an equipment combination process, and particularly relates to a combined-type granulator. The combined-type granulator comprises a plurality of layers of combined box bodies, a temporary storage feed bin and a plurality of layers and groups of roller mills. Each group of roller mills is equipped with a rotary joint, a cleaning blade, an elastic stripping frame, a material baffle and a guide plate; a waste gas emptying interface is also arranged on each of the box bodies, and an air inlet at a lowest layer of the granulator is arranged on a bracket. The linear velocity of a tooth surface and the flow rate of volume of a rotary drum of each of the roller mills at a second layer are higher than those of a rotary drum of each of the roller mills at a first layer, and the linear velocity of a tooth surface and the flow rate of volume of a rotary drum with a reticular tooth socket or a single radial tooth socket of each of the roller mills at an adjacent lower layer are designed according to the volume properties of materials in the area. According to the granulator disclosed by the invention, hard foreign matters can be stripped, and simple granulation of soft materials in a cream state, a paste state, a slurry state and the like can be realized; meanwhile, caky and blocky materials can be pulled into monomer granules, soft and hard materials can simultaneously enter into the granulator, and granules at an outlet have a plurality of pores and are in an irregular shape.

A containerless casting core forming machine comprises a multi-axis motion system (30) comprising an X-axis motion system (31), a Y-axis motion system (32) and a Z-axis motion system (33),a cutting system(80)which is connected with the multi-axis motion system, a driving system (70) which drives the multi-axis motion system, and a seat (50) which the multi-axis motion system is fixed above. Most of sand produced by cutting fall down below the seat and could not spread into the multi-axis motion system. Therefore, the malfunction is decreased, and the precision and the service life of the containerless casting core forming machine is improved.

The invention is applicable to the field of nuclear power station instrument control, and provides a nuclear power station reactor protection system testing method and an apparatus thereof. The method comprises the following steps: triggering a CPU onsite testing signal; triggering a binary testing signal; determine a blocking signal according to the CPU onsite testing signal and the binary testing signal, wherein the CPU onsite testing signal is not always being 0 in the presence of the binary testing signal; determining an action signal according to the binary testing signal; and executing a corresponding operation according to the locking signal and the action signal. The method and the apparatus can reduce the probability of occurrence of misoperation of AV42.

The invention discloses an apparatus for controlling a CAN bus of an optical fiber local area network. The apparatus comprises an optical path unit, an electric path unit, a control unit, a impedance matching resistor, an on-board CAN bus, a level conversion chip, an isolation chip, an optical fiber input and output interface and an electric signal CAN interface; the optical path unit is provided with two interfaces: a receiving interface and a transmitting interface; the electric path unit is a standard electric signal CAN interface; the control unit comprises two parts: a CPU and a CAN controller; the on-board CAN bus is used for realizing a CAN networking function; the invention further discloses an application of the apparatus to accessing an optical fiber or an electric signal device for realizing the mutual connection of two local area network CAN bus control apparatuses, and for realizing the connection between two or more CAN local area networks; and the apparatus disclosed by the invention converts an externally accessed optical signal into an electric signal and connects the electric signal to the bus to realize the local area network type CAN bus so as to establish an interconnected optical fiber CAN network, the functions of an optical splitter are realized by the on-board CAN bus, and multiple paths of optical fiber interfaces and electric signal interfaces are compatible at the same time.

The invention provides a circuit for preventing power up instantaneous shock in inverter air conditioner which includes a positive temperature coefficient thermistor series connected with AC electrical source front line in air conditioner system, a power relay switch parallel connected with two sides of the positive temperature coefficient thermistor, the power relay coil and a controllable switch device are series connected between electrical source and ground electrode, the controllable switch device control end is connected with one electrical source in air conditioner system. The circuit provided by the invention can prevent current shock in power up instantaneous, and can conquer disadvantage of poor anti-interference performance in present device because of impervious for main control singlechip reduction, and protect air conditioner system normal working more efficiently.

The invention relates to an optical manipulation device, which comprises a display panel, a transparent supporting plate, a deformation unit, a light source, an image sensing module, a function selecting module and a processing module. The deformation unit is placed between the transparent supporting plate and the display panel, and has a pattern structure. When a user applies pressure on the display panel, the deformation unit produces deformation; and when pressure application to the display panel is stopped, the deformation unit recovers to the primary shape. The light source provides light beams to the deformation unit; and the sensing field of the image sensing module covers the whole deformation unit. The function selecting module is placed beside the display panel, and is provided with a plurality of function selecting keys for the user to select a predetermined function. The processing module is electrically connected with the display panel, the function selecting module, the image sensing module and the light source. The processing module facilitates the display panel to display a predetermined picture corresponding to the predetermined function.

The present invention discloses a film cutting and pulling method suitable for material packaging, and relates to the technical field of material packing techniques. The film cutting and pulling method comprises cutting a packaging film in a transportation process of the packaging film. In comparison with the conventional packaging methods, film cutting time is saved, and the packaging speed is thus raised. When the method is used for packaging materials of different specifications, the position of a film cutting mechanism does not need to be adjusted, the length of the packaging film only needs to be set in the system, and thus precision cutting of the packaging film can be carried out; and during packaging of materials of different specifications, time for adjusting machinery equipment is saved, and thus the efficiency of the whole packaging process is raised.

The invention discloses a sulfur hexafluoride gas density relay, a signal generator is good in connecting point contacting and electrical performance, service life is long, and accuracy is high. The sulfur hexafluoride gas density relay comprises a shell body, a base, an end base, a Burdon tube, a temperature compensate element, a machine core, a plurality of microswitches, switch adjusting mechanisms and a signal trigger mechanism. The end base, the Burdon tube, the temperature compensate element, the machine core, the plurality of microswitches, the switch adjusting mechanisms and the signal trigger mechanism are arranged in the shell body. The number of the switch adjusting mechanisms is the same as that of the microswitches. Each switch adjusting mechanism comprises a fixing piece, a rotating shaft rivet a spring and a rotating piece. One end of each fixing piece is connected with the other end of each rotating piece through each rotating shaft rivet and each spring. The other end of each fixing piece is fixed on the base, so that each rotating shaft rivet and a sector gear shaft are coaxial. The other end of each rotating piece is fixedly provided with each microswitch. The signal trigger mechanism comprises a signal trigger mechanism shaft and a plurality of cams. The signal trigger mechanism shaft is coaxially connected to one end of the sector gear shaft. The cams are arranged on the signal trigger mechanism shaft and abut against connecting point operation handles of the microswitches.

The invention discloses a spindle positioning mechanism of a horizontal boring machine. The mechanism comprises a controller, a spindle motor for driving a boring rod to rotate, a position induction part and a sensor, wherein the position induction part is arranged on the boring rod; the sensor is used for detecting the position induction part; the signal output end of the sensor is connected with the controller; and when the boring rod stops positively rotating and negatively rotates to a stop allowable position, the sensor detects the position induction part and outputs a signal to the controller, and the controller controls the spindle motor to stop. By the mechanism, the positioning accuracy and reliability of a spindle of the horizontal boring machine can be obviously improved. The invention also discloses the horizontal boring machine with the spindle positioning mechanism.

The invention provides an electromagnetic piston type tool changing device which comprises a tool changing arm for rotating, and a tool changing hand for clamping a tool. The tool changing hand comprises a clamping holder, an elastic piece, a piston, abutted-against pieces and an electromagnet; the clamping holder is arranged on the tool changing arm; multiple assembling holes are formed in the circumferential wall of the clamping holder in a penetrating way; the elastic piece, the piston and the electromagnet are arranged on the clamping holder in a sleeving mode; the position of the electromagnet remains stationary relative to the piston; two ends of the elastic piece are elastically abutted against the electromagnet and the piston; and the multiple abutted-against pieces are movably arranged in the multiple assembling holes in the clamping holder and are abutted against the piston. According to the electromagnetic piston type tool changing device, no impact happens during the tool changing process, and the tool is clamped by multiple independent parallel functional components, so that the safe operation factor is high; and a locking manner is changed, so that the occurrence of the phenomenon of tool falling can be effectively prevented.

The invention discloses a working-condition self-adaptive lifting and falling-prevention device of a scaffold. The working-condition self-adaptive lifting and falling-prevention device of the scaffold comprises a scaffold lifting mechanism, a lever type linkage mechanism and a falling-prevention mechanism, wherein the scaffold lifting mechanism, the linkage mechanism and the falling-prevention mechanism are arranged on a frame, a bolt hole which is connected with a scaffold frame is formed on the lower portion of the frame, the scaffold lifting mechanism is connected with the falling-prevention mechanism through the linkage mechanism, and the upper portion of the linkage mechanism is connected with an outer wall. The working-condition self-adaptive lifting and falling-prevention device of the scaffold has the advantages of well achieving purposes of normal lifting and falling-prevention due to the fact that an integrated drive system is formed by achieving the normal lifting function through the scaffold lifting mechanism, achieving real-time monitoring and transmission to a lifting state through the linkage mechanism and achieving the emergency-brake handling to sudden accidents through the falling-prevention mechanism; being skillful in design, convenient to install, safe and reliable, particularly suitable for the scaffold in the high-rise building construction and good in popularization and use value.

The invention relates to a digital valve driven by a motor. The digital valve driven by the motor comprises the motor, a digital valve assembly and a controller microcomputer or a PLC (programmable logic controller), wherein the motor is connected with the digital valve assembly, receives digital pulse signals sent by the controller microcomputer or the PLC, controls product output flow magnitudeand closing, and completes multipoint and multispeed control of a single cylinder or multiple cylinders and synchronous interpolation motion of the multiple cylinders, one end of a threaded sleeve ofthe digital valve assembly is fixed on the motor, the other end of the threaded sleeve of the digital valve assembly is connected with a connection rod in a threaded mode, the connection rod, a valvecore and a positioning sleeve are connected into a whole through a positioning pin, an anti-rotating screw fixed on an end cap penetrates into a groove in the positioning sleeve, and when the motor rotates, the connection rod cannot rotate due to the action of the positioning pin, and changes motion into linear motion through threads of the threaded sleeve and the connection rod so as to enable the valve core and a valve body to perform relative linear displacement motion, thereby changing the opening degree of all oil ports of the valve body or closing the oil ports of the valve body. The digital valve driven by the motor has the advantages of being high in control accuracy, high in pollution resistance, simple in structure and low in cost.

The invention provides a distributed localized relay protection system which comprises at least two sub-machines, wherein each sub-machine is provided with a startup processor, a protection processorand an instruction sending module, wherein the startup processor is connected with a first acquisition module; the protection processor is connected with a second acquisition module; the startup processor is configured to issue a startup instruction to the instruction sending module according to information acquired by the first acquisition module; the protection processor is configured to issue aprotection instruction to the instruction sending module according to the information acquired by the second acquisition module; and the instruction sending module outputs an instruction for performing a protection action after simultaneously receiving the protection instruction of the protection processor and the startup instruction of the startup processor. According to a technical solution provided by the invention, the instruction sending module outputs the instruction for performing the protection action to a relay protection device only after receiving the startup instruction and the protection instruction simultaneously, so that reliability of a distributed localized relay protection device can be improved.

The invention discloses a coating material for electrostatic spraying on a polypropylene automobile bumper bar. The coating material is prepared from 8-15 parts by weight of polyurethane resin ester, 10-20 parts by weight of polyester resin, 18-28 parts by weight of modified functional resin, 5-10 parts by weight of ethyl acetate, 5-10 parts by weight of butyl acetate, 0.5-2 parts by weight of an auxiliary agent, 5-10 parts by weight of acrylic resin, 0.5-2 parts by weight of a resistance regulator and 30-40 parts by weight of colorant paste. The preparation method comprises the following steps: a. adding the polyurethane resin ester, the polyester resin, the modified functional resin, the ethyl acetate, the butyl acetate, the auxiliary agent, the acrylic resin and the resistance adjusting agent into a blending kettle and carrying out uniform stirring, b. according to the color of the automobile coating, adding 80-95% of the corresponding colorant paste into the above mixture, carrying out stirring, detecting the color of the coating film, and according to color difference, continuously adding different colorant paste to adjust the color so that the coating film color satisfies the standard, and c. carrying out detection, and when the coating film is qualified, carrying out filtration and packaging.

A lamp driving circuit with a floating power supply driver includes a microcomputing unit (20), a floating power supply driver (10) and a driving unit (30). The microcomputing unit (20) and the floating power supply driver (10) are either two independent integrated circuits or a single integrated circuit and manufactured under a normal voltage. The floating power supply driver (10) is coupled to the microcomputing unit (20) via two independent high-pressure coupling capacitors, instead of sharing the same ground with the microcomputing unit (20). The microcomputing unit (20) and the floating power supply driver (10) provide at least one low-voltage driving pulse output pin and one high-voltage driving pulse output pin to control the driving unit (30) so that a lamp connected to the driving unit (30) can be lit up.

The invention discloses a motor winding temperature estimation and protection method. The method comprises the following steps: S1, obtaining a BP neural network heat dissipation model of a motor winding; S2, calculating the temperature of a motor winding; S3, protecting a motor winding. Due to the fact that the neural network can conduct accurate modeling on the heat dissipation process under thecomplex heat dissipation condition, the method is more suitable for application scenes with the complex heat dissipation condition; a winding heating temperature change rate caused by loss is calculated by using the motor winding current; the winding temperature is calculated according to the winding heat dissipation temperature change rate and the winding heating temperature change rate; the calculated winding temperature is used to limit motion control output of the motor by using a multi-segment temperature cut-off curve so as to carry out temperature protection on the winding and preventdamage caused by overhigh temperature of the winding.

The invention discloses a material level and liquid level switch based on the microwave detection technology. The material level and liquid level switch comprises a microprocessor circuit, a microwave signal generator, a high-frequency power divider, an amplitude and phase discriminator, a sensitivity potentiometer, a display circuit and a control circuit. The microprocessor circuit outputs a 300MHz-2.4GHz variable-frequency signal controlling the output of the microwave signal generator, the variable-frequency signal passes the high-frequency power divider and is divided into two paths, one path is output to an antenna, one path is output to the broadband amplitude and phase discriminator, the signal in the range of the antenna is conveyed to the broadband amplitude and phase discriminator for comparison, the signal output by the amplitude and phase discriminator is sampled and processed by the microprocessor circuit to obtain a processed signal, and the processed signal is respectively transmitted to the sensitivity potentiometer, the display circuit and the control circuit. The material level and liquid level switch has the advantages that various objects can be detected under a noncontact or slight contact condition, misoperation can be avoided even high-viscosity substance adhesion exists, detection error rate is reduced, and detection accuracy and work efficiency are increased.

The invention efficiently saves power using a compact and light constitution without a malfunction in a lighting fixture. A power saving apparatus 1 is provided with a power control unit 3 for controlling a power consumption in a fluorescent lamp 2, and a controller 4 for remotely operating the power control unit 3. The power control unit 3 is provided with a triac 7 for partially cutting an AC voltage waveform, a control circuit 8 for controlling the triac 7, and a receiving circuit 9 for receiving control information on the triac 7. The controller 4 is provided with a configuration circuit 14 for configuring the control information, and a transmitting circuit 15 for transmitting the control information. The transmitting circuit 15 in the controller 4 and the receiving circuit 9 in the power control unit 3 are connected by a communication line 17.

The invention discloses water spraying and dust removing equipment for green building construction, and belongs to the field of building construction. The water spraying and dust removing equipment comprises a building cart, a water storage tank, a water injection pipe, a dust suction box, a dust suction assembly, two containing boxes and two water spraying assemblies; the water storage tank is arranged at the bottom end of the building cart, and the water injection pipe communicates with the interior of the water storage tank; the two containing boxes are symmetrically arranged on the outer walls of the two sides of the building cart, a first sealing assembly is arranged at the top end of each containing box, the two water spraying assemblies are arranged in the two containing boxes correspondingly, the dust suction box is arranged on the outer wall of the building cart, and a partition plate is arranged in the dust suction box. A second sealing assembly is arranged at the top end of the dust suction box, the dust suction assemblies are installed on the partition plate, and a water conveying assembly is arranged between each water spraying assembly and the water storage box. The angle of the nozzle can be adjusted according to the actual environment and the external wind direction and wind speed; meanwhile, the spray head and the dust collection hopper are prevented from being directly exposed outside the building cart.

The invention discloses a sulfur hexafluoride gas density relay which is high in shock resistance, a signal generator is good in connecting point contacting and electrical performance, service life is long, and accuracy is high. The sulfur hexafluoride gas density relay comprises a shell body, a base, an end base, a Burdon tube, a temperature compensate element, a machine core, a plurality of microswitches, switch adjusting mechanisms and a signal trigger mechanism. The end base, the Burdon tube, the temperature compensate element, the machine core, the plurality of microswitches, the switch adjusting mechanisms and the signal trigger mechanism are arranged in the shell body. The number of the switch adjusting mechanisms is the same as that of the microswitches. Each switch adjusting mechanism comprises a fixing piece, a rotating shaft rivet a spring and a rotating piece. One end of each fixing piece is connected with the other end of each rotating piece through each rotating shaft rivet and each spring. The other end of each fixing piece is fixed on the base, so that each rotating shaft rivet and a sector gear shaft are coaxial. The other end of each rotating piece is fixedly provided with each microswitch. The signal trigger mechanism comprises a signal trigger mechanism shaft and a plurality of cams. The signal trigger mechanism shaft is vertically fixed on the surface of a sector gear. The cams are arranged on the signal trigger mechanism shaft and abut against connecting point operation handles of the microswitches in a one-to-one-corresponding mode.

The invention relates to locomotive traction converter network voltage fluctuation control, in particular to a locomotive traction converter network voltage fluctuation composite detection control device and a control method thereof. The invention provides the locomotive traction converter network voltage fluctuation composite detection control device and the control method thereof to solve the problems and defects existing in an existing locomotive traction converter network voltage fluctuation detection control method. The method is realized through four-quadrant rectifier control software.The voltage outer loop of the control device is changed into a sliding mode controller from a traditional PI controller, and a multiple control algorithm is further added, so that on one hand, the network voltage jump quantity can be quickly controlled when network voltage fluctuation is detected, and on the other hand, the pollution of alternating-current side current harmonics to a power grid isreduced. The robustness and the anti-interference capability of a control system are improved; faults of a locomotive high-voltage system, a traction system, an auxiliary system and the like cannot be caused when network voltage fluctuation occurs; thus safe and stable operation of a train is guaranteed.

The invention belongs to the technical field of aviation onboard communication, and particularly relates to an acentric communication method suitable for an aviation onboard communication system. The acentric communication method comprises the steps that an annular buffer zone is established inside each aviation onboard communication device, wherein the annular buffer zone comprises n data storage units sequentially arranged in a clockwise direction or an anticlockwise direction, the first data storage unit and the nth data storage unit are adjacent, and the annular buffer zone of each aviation onboard communication device is provided with a storage pointer; when at least one aviation onboard communication device needs to transmit a data package, acorresponding aviation onboard communication device transmits the data package to an Ethernet switch periodically; when at least one aviation onboard communication device receives the data package from the Ethernet switch, the received data package is stored into the data storage unit, in which the storage pointer is placed, then the storage pointer moves clockwise or anticlockwise to anext data storage unit.