552results about How to "Reliable switching" patented technology

An IC tag module enables data communication with, and receipt of power from, an external unit through a wireless port and enables the same with an electronic device in which the IC tag module is incorporated through a wired port, which includes a wired communication port and a wired power supply port. The IC tag module further includes a power supply circuit unit for combining power supplied from both the wireless port and the wired power supply port and for supplying the combined power supply to the IC tag module. A data storage circuit unit of the IC tag module stores data received through the communication ports, and a control circuit controls the operation of the module. The power supply circuit detects whether power is supplied first through the wireless port or the wired power supply port. If power is supplied from both ports, the control circuit enables communication with the data storage circuit unit through the port from which power was supplied first, and disables communication through the other port.

The invention relates to a heat switching system and a heat switching method of a dual-redundant CAN bus, and provides a networking mode of a dual-redundant CAN bus system and a dual-bus heat exchanging method. The networking mode of the dual-redundant CAN bus system is as follows: two bus cables are designed in network; each node unit comprises a microprocessor and two CAN controllers which are respectively connected with two bus cables to form two independent CAN channels. The dual-bus heat switching method is as follows: during operation, one of the channels is a working channel for receiving and transmitting messages and the other channel is used as a reserve channel for only receiving messages; and a CAN drive control software in the node monitors the channel state in real time, switches the reserve channel into a working channel when a fault occurs in the working channel and repairs the original working channel and sets the working channel to be a reserve channel.

Disclosed is a method and node apparatus for traffic protection of Optical Transport Network (OTN), including: setting a part of channels in one fiber as working channels used for carrying traffic in need of protection, and setting a part of channels in the other fiber with a reverse transmission direction as protection channels, the number of which is equal to that of the working channels, to form a one-to-one protection for the working channels; when a failure in an optical line of OTN is detected, determining a bridging node and a switching node in accordance with pre-designated protection strategy, bridging and switching the traffic to be transmitted through the failed optical line between the working channels and the protection channels at the determined bridging node and switching node. This invention can realize OTN protection based on two-fiber OMS shared protection ring, and improve the transmission reliability of optical networks.

The invention discloses a quasi-periodic handoff triggering mechanism based on handoff invitation sending. The quasi-periodic handoff triggering mechanism based on handoff invitation sending comprises, according to the mobile line diagram and the moving speed of a mobile terminal as well as the localization information of the base station of a serving cell and the base station of a neighboring cell to structure a cell cluster and to determine the reference time, the basic period and the quasi-period for transmitting handoff invitation; transmitting the handoff invitation to the mobile terminal periodically through every substation in the cell cluster and accordingly triggering handoff. The quasi-periodic handoff triggering mechanism based on handoff invitation sending overcomes the shortcomings of traditional handoff triggering mechanisms based on signal strength receiving and enables handoff triggering to be timely, accurate and reliable, and meanwhile, shortens the executing time for handoff, improves the handoff speed and efficiency and avoids ping-pong handoff, thereby having a broad application prospect in wireless communication environments with relatively fixed mobile lines and relatively high moving speed such as high-speed railways, highways, urban BRT (bus rapid transit) and the like.

A hammer drill (2) includes a clockwise and counterclockwise driven tool spindle (28), a drive pinion (70) operatively connectable with the tool spindle (28) for transmitting a torque thereto, a separate control handle (6) for selecting one of the hammer drill functions including a pure drilling operation, a pure percussion operation, and a rotary-percussion operation), and a switching device (8) which is adjustable in accordance with a position of the control handle (6) and which is shiftable by the control handle (6) in a clockwise rotation position for effecting a pure drilling operation in a clockwise direction and in a counterclockwise rotation position for effecting a pure drilling operation in a counterclockwise direction.

A vehicle headlamp is provided with semiconductor-type light sources, lenses, a reflector, light shading members, prism members, and a switching device. When the light shading members are positioned in a first location by means of the switching device, a light distribution pattern LP for low beam, having one or more cutoff lines, is illuminated. In addition, when the prism members are positioned in the first location by means of the switching device, a light distribution pattern HP for high beam is illuminated. As a result, the vehicle headlamp can achieve downsizing, weight reduction, power saving, and cost reduction.

The invention provides a burr-free clock switching circuit. The burr-free clock switching circuit comprises a single-level switching circuit or multilevel switching circuits so as to realize the switching of two or a plurality of clock signals. The switching circuit at each level comprises a first clock detection module, a second clock detection module and a clock switching module; wherein the first and second clock detection modules are used for detecting whether the two clock signals to be switched have failures respectively; and the clock switching module is used for selecting a switching signal and a clock output enabling signal according to clock detection results of the two clock detection modules. The clock detection modules are used to detect whether the clock signals to be switched jump normally; and the switching circuit is controlled according to the detection results so as to ensure that a required clock is reliably switched to even if errors happen to the clock to be switched.

The invention discloses a multi-vehicle mounted station cooperation cell switching method for train-ground communication under a high-speed moving environment. The first scheme comprises the following steps of: arranging a vehicle mounted station at the front end and the rear end of a train, wherein the two vehicle mounted stations are mutual communication backups; applying a communication resource for the vehicle mounted station at the rear end while switching the vehicle mounted station at the front end; directly switching to the communication resource applied by the vehicle mounted station at the front end while switching the vehicle mounted station at the rear end; or switching the vehicle mounted station at the rear end by directly using available information acquired by the vehicle mounted station at the front end. The second scheme comprises the following steps of: switching with only the vehicle mounted station at the front end and performing data communication with only the vehicle mounted station at the rear end; applying the communication resource for the vehicle mounted station at the rear end and recording the switching position while switching the vehicle mounted station at the front end; and directly switching to the communication resource applied by the vehicle mounted station at the front end while the vehicle mounted station at the rear end reaches the switching position. The method has the advantages of short switching time, uninterrupted communication during the cell switching and capability of meeting the requirements of the train-ground communication under the high-speed moving environment.

The invention discloses a position sensor-free permanent magnet synchronous motor starting method. The method includes the steps of: 1. a two-time current injection method based on a current closed loop is adopted so as to ensure that an initial magnetic pole position of a permanent magnet synchronous motor is a 0-degree direction; 2. VF control is adopted in a low-speed part, a switching frequency is selected at low frequency, waiting for switching can be started till VF control runs to the frequency, and at the same time, a sliding-mode observer also starts to work; 3. through artificial setting, an active smooth switching strategy is adopted, so that the motor can automatically switch at low and intermediate speed switching positions; and 4. after success switching, a position sensor-free method is adopted to control operation of the permanent magnet synchronous motor in a closed-loop manner. The method has the advantage of enabling the position sensor-free permanent magnet synchronous motor to realize rapid and smooth starting at low speed without selecting VF parameters.

The features of this invention allow construction and operation of a variety of high voltage, high repetition rated pulse generators of the Marx type that are switched with photon initiated semiconductor switches. The Photon Initiated Switches can be constructed with bulk materials or in layered devices such as thyristors. Variations on the invention permit the formation of nearly rectangular, flat-topped, high voltage pulses. Although the invention has been described in detail with particular reference to these preferred embodiments, other embodiments can achieve the same results without departing from the scope of the invention. Variations and modifications of the present invention will be obvious to those skilled in the art and it is intended to cover in the appended claims all such modifications and equivalents. The entire disclosures of all references, applications, patents, and publications cited above are hereby incorporated by reference.

The invention relates to an air pressure electric control auxiliary braking device, which comprises an original vehicle front braking loop, an original vehicle back braking loop, an electric control front braking loop and an electric control back braking loop, wherein the electric control front braking loop is formed by sequentially connecting an air inlet of a shuttle valve, a first high-speed switching valve, a first check valve, a quick release valve and a front braking air chamber by a front air storage cylinder in series; the electric control front braking loop and the original vehicle front braking loop are connected in parallel; the electric control back braking loop is formed by sequentially connecting the other air inlet of the shuttle valve, the first high-speed switching valve, a second check valve, a relay valve and a back braking air chamber by a back air storage cylinder in series; the electric control back braking loop and the original vehicle back braking loop are connected in parallel; a first pressure sensor is arranged between an upper cavity of a double-cavity braking valve in the original vehicle front braking loop and the quick release valve; a second pressure sensor is arranged between the quick release valve and a front braking chamber; a third pressure sensor is arranged between the relay valve and the back braking air chamber; a second high-speed switching valve is arranged between the upper cavity of the double-cavity braking valve in the original vehicle front braking loop and the quick release valve; and a third high-speed switching valve is arranged between a lower cavity of the double-cavity braking valve in the original vehicle back braking loop and the relay valve. The air pressure electric control auxiliary braking device has the advantages of simple structure, low cost, convenient installation and wide application range.

The invention discloses a computer interlock method and system, and belongs to the technical field of train control. The system disclosed by the invention comprises a plurality of signal devices and an interlock master control module connected with the plurality of signal devices, the interlock master control module exchanges data with an automatic train monitor system (ATS), a train automatic protective system / train automatic operation system (ATP / ATO), a train control system (CBTC) and a railway signal device (LEU), and the interlock master control module controls signal devices in an area of jurisdiction through interlocking. The signal device includes at least one or more of the following devices: a signal device, a track switch, a section and platform screen doors. The invention further discloses a computer interlock system. The technical schemes of the application can be used as a safety processing mode in connection between different railways, the interlock function of a computer can be achieved. Associated functions under a CBTC mode are expanded according to needs of urban mass transit system.

A torsion spring for an electro-mechanical switch is presented. The torsion spring comprises a set of tines including at least one tine extending from the free end of the armature of a switch. A terminus portion is rotatably suspended between the tines, and includes a conducting transmission line, at least a portion of which is exposed for electrical contact. The conducting transmission line has a length selected such that the exposed portion of the transmission line forms a circuit between the input and output of the micro-electro-mechanical switch when the micro-electro-mechanical switch is urged into a closed position, with the terminus portion rotating via the tines to form a conformal connection between the exposed portion of the conducting transmission line and the input and output of the switch, thus optimizing the electrical flow therebetween. The switch is also applied to MEMS devices.

A variable valve drive for internal combustion engines is used for activation of gas exchange valves, in which the gas exchange valves engage different cam profiles of a camshaft driven by the crankshaft of the internal combustion engine. The camshaft has at least one displaceable cam segment that carries multiple different cam profiles having the same base circle section. Each one of the cam profiles is switched to be active for the related gas exchange valve, in accordance with the axial position of the cam segment relative to at least one related gas exchange valve. The axial positioning of the cam segment takes place by a setting shaft that can be rotated and is disposed parallel and next to the camshaft. The setting shaft has a guide track in which a tappet is guided, which acts on a transfer element that determines the axial position of the cam segment.

The invention relates to an electronic lock for a locking system, in particular an electronic ignition lock for a motor vehicle. The lock has a holder into which an associated electronic key can be introduced. The key, which is in the holder, exchanges at least one coded operating signal with the lock. After positively evaluating the operating signal, the holder can be moved into at least one actuating position. The lock has a blocking element which adjusts on introduction of the key into the holder and / or removal of the key from the holder. Movement of the holder is possible when the key is correctly in the holder. Furthermore, the lock has a switching element on which the adjusting movement of the blocking element exerts a switching action via a separate transmitter which can be brought into operative connection both with the blocking element and with the switching element.

A RF MEMS switch comprising a crossbeam of SiC, supported by at least one leg above a substrate and above a plurality of transmission lines forming a CPW. Bias is provided by at least one layer of metal disposed on a top surface of the SiC crossbeam, such as a layer of chromium followed by a layer of gold, and extending beyond the switch to a biasing pad on the substrate. The switch utilizes stress and conductivity-controlled non-metallic thin cantilevers or bridges, thereby improving the RF characteristics and operational reliability of the switch. The switch can be fabricated with conventional silicon integrated circuit (IC) processing techniques. The design of the switch is very versatile and can be implemented in many transmission line mediums.

A dipping apparatus for dipping the workpiece W in a treatment bath. The workpiece is transferred while fixed on a conveying traveling body 2, and each one flipped upside down together into the treatment bath for carrying out a surface treatment of the workpiece W.The dipping apparatus is provided with a positioning and fixing device to position the conveying traveling body 2 onto the guide rail 17a on the rotation base 15 at a fixed position and to fix the conveying traveling body 2 to the rotation base 15. A feeding mechanism feeds the conveying traveling body 2 to the fixed position on the rotation base 15.

In order to improve the durability of a rotor, a flow channel switching valve is provided, which includes a stator having a contact plane and a rotor having a contact plane. The stator has circulation openings on the contact plane, and the circulation openings are respectively connected to a plurality of flow channels. The rotor has at least one groove for communicating two of the circulation openings of the stator. The rotor is forced to press against the contact plane of the stator to rotationally slide, so as to switch the circulation openings of the stator that need to be communicated. Polishing is performed on the contact plane of the stator after being applied with a diamond like carbons coating. Furthermore, the contact plane of the rotor is made of a resin.

The method includes following steps: 1) switch of synchro control signal transmission and modulation; 2) switch of modulated signal level; 3) arbitration and transmission of priority level of bus signal; 4) reception of bus signal, and inversion of level; 5) precise identification of synchro control signal; 6) executes operation of switching in each step according to synchro control signal.

The invention relates to a rocket thrust chamber with the fuel switching function and a supply system of the rocket thrust chamber and belongs to an afterburning type rocket engine capable of switching hydrogen peroxide / kerosene into liquid hydrogen. The rocket thrust chamber aims at integrating a hydrogen peroxide / liquid hydrogen engine with a hydrogen peroxide / kerosene engine and achieving the fuel switching function. The technical schemes of a head four-bottom three-cavity structure suitable for switching fuel, a combined fuel nozzle shared by hydrogen rich gas, hydrogen ultra-rich gas and kerosene, a straight-hole type oxidizing agent nozzle continuously injecting oxygen rich gas before and after fuel is switched, a body where an oxidizing agent flows through uninterruptedly for cooling, a hydrogen peroxide system used before and after fuel is switched, a kerosene system used before fuel is switched, a liquid hydrogen system used after fuel is switched and the like are adopted. The rocket thrust chamber with the fuel switching function is suitable for engines of a single-stage-to-orbit rocket, a core-stage rocket and a reusable aerospace craft and the rocket thrust chamber also can be applied to an engine of a hydrogen peroxide / liquid hydrogen upper-stage rocket when fuel is not switched.

The invention discloses an insulated gate bipolar transistor (IGBT) gate driving push-pull circuit. The IGBT gate driving push-pull circuit is powered by a positive-negative power supply of a driving chip secondary side, and output positive-negative level. A pre-push-pull circuit, a level converting circuit and a post-push-pull circuit share the positive-negative power supply of the driving chip secondary side. The output of the driving chip is connected with the input of the pre-push-pull circuit; the output of the pre-push-pull circuit is connected with the level converting circuit; the output of the level converting circuit is connected with the post-push-pull circuit; and the output of the post-push-pull circuit is connected with a gate driving resistor of the IGBT. The pre-push-pull circuit is combined with the level converting circuit to provide a driving signal of interlocking and a hardware dead zone for MOS (metal oxide semiconductors) of the post-push-pull circuit, so that direct communications of the interior of the MOS push-pull structure is avoided; and GS voltage of the MOS is limited in a range of + / - 20V, so that reliable operation of the MOS is guaranteed. Adopting the MOS, the post-push-pull circuit can cooperate with effective IGBT gate clamps to limit IGBT short-circuit currents, and improve operation reliability of the IGBT.

There is provided a system (1) comprising: a processing unit (11) equipped with execution modes including a non-secure mode (3) in which access to a protected region of a memory is prohibited by a support function (12) and a secure mode (2) in which access to the protected region is permitted; and a hypervisor (20) which runs in the secure mode. The hypervisor includes: a first setting unit (23) for setting a first operation condition (21), which includes enabling a first OS (30) running in the secure mode to access the protected region and the unprotected region of the memory; and a second setting unit (24) for setting a second operation condition (22a), which includes enabling a second OS (41) running in the non-secure mode to access the unprotected region, using the support function to prevent the second OS (41) from accessing the secure region, and enabling a transition to the secure mode by accessing of the second OS to a first device shared with the first OS.

The invention relates to a cam shaft of an engine and an air valve driving device. The cam shaft is structured such that an air inlet or exhaust rocker arm is provided with first cam and second cam adjacent to each other. A flange is arranged between the two cams. A lift part is arranged on each of the two cams. The flange is not arranged in parts, as base circles, of the two cams. A rocker arm roller can be driven by an actuator driven by compressed air to slide on a roller shaft to switch contact between the two cams. An ECU determines an electrifying moment of an electromagnetic valve according to a signal of cam shaft position sensor to control on-off of a compressed air pipeline connected to the actuator. When the rocker arm roller is switched to the other cam, as a result of blockageby the flange, only when the cam shaft rotates to the part, as the basic circle, of the two cams, the cams can be switched, so that the reliability is ensured. A plurality of actuators can be controlled by one electromagnetic valve. The cam shaft is low in cost. The two cams can be used for achieving functions needed by the engine, for example, variable air valve or engine brake.

The invention relates to a photovoltaic power generation and urban power grid parallel power supply switching device which solves the problems of the existing device that the existing device is complex in structure, high in cost and poor in backflow-prevention performance during parallel power supply and a photovoltaic power supply cannot output the maximum power constantly. The photovoltaic power generation and urban power grid parallel power supply switching device comprises an alternating-current switching unit, a power supply unit, a control unit, a driving circuit, a sampling regulation unit and the like. The alternating-current switching unit is subjected to logic switching control by aid of the pulse width modulation strategy and the digital signal processor (DSP) software phase lock technology. The photovoltaic power generation and urban power grid parallel power supply switching device provides good guarantee for achievement of backflow-free photovoltaic power generation and urban power grid parallel power supply.

The invention discloses a high-precision remote optical path switch scheme and a system, belonging to the technical filed of optical networking communication. An on-line monitoring and switching unit exchanges information with a remote console by Ethernet or a GPRS mode, a main optical-fibre circuit and an auxiliary optical-fibre circuit are utilized to transmit optical signals, and optical signal power is monitored and compared with a set switching threshold to determine whether the optical path switching is gated; the system comprises the on-line monitoring and switching unit, a communication control unit and the like; the on-line monitoring and switching unit is composed of an optical splitter, a photodiode, a logarithm amplifier, an A / D converter, an optical switch and a control chip; and by introducing the logarithm amplifier, the accuracy of the optical power acquisition value of the traditional fibre is effectively improved, and the problem that the precision is difficult to be accurately measured due to larger attenuate generated after long distance transmission of an optical fibre trunk network is improved, thereby ensuring more accurate and reliable optical path switch in traditional optical path protection. In addition, after the communication control unit is introduced, remote centralized management on an optical path protection module is realized.

An electric vehicle includes: a main battery; an electric power converter configured to convert power to driving power of a drive motor; an auxiliary battery configured to supply power to auxiliaries; a power supply harness connecting the auxiliary battery to the auxiliaries; a step-down converter having an output end connected to the power supply harness, the step-down converter being configured to step down an output voltage of the main battery to the driving voltage of the auxiliaries; an interrupter configured to isolate the step-down converter from the power supply harness at the time when a predetermined specific abnormality has been detected; and a discharger configured to discharge a capacitor incorporated in the electric power converter, the discharger being configured to operate by receiving electric power supplied from a first power supply path which connects the output end of the step-down converter to the interrupter.

The invention discloses a seat angle adjusting device comprising a ratchet wheel, a stop plate, a locking slider and a pawl. A driving device can optionally drive the locking slider to a locking position or a retracting position and drive the pawl to a stretching position or a retracting position. The stop plate is provided with a first stop limit portion and a second stop limit portion. When the first stop limit portion is stressed by rotation torque in rotation direction, the locking slider at the locking position is abutted against the circumference of the first stop limit portion. When the rotation torque is larger than a first preset torque value, the first stop limit portion can deform circumferentially under the action of the locking slider, and the pawl at the extending position can be driven to rotate by the ratchet wheel to a toothed portion on one side of the pawl to mesh with the ratchet wheel completely. When the rotation torque is larger than a second preset torque value, the second stop limit portion can be abutted against the pawl, and the second preset torque value is larger than the first preset torque value. The invention further provides a seat utilizing the seat angle adjusting device on the basis of the above structure.

It is aimed at not only enabling access to an inaccessible SDRAM area from a PC which only outputs A0 through A11 signals, but also making a common memory module connectable to earlier or latest PCs independently of their models. According to the construction, a connected PC (computer) inputs a high-order address signal A12. It is determined whether or not the input A12 signal is set to a state different from an unused state. A determination signal is generated so as to indicate a state corresponding to a determination result. When the determination signal indicates a changed state, the PC inputs A0 through A12 signals and supplies them to a memory chip 20. When the determination signal indicates an unchanged state, the PC inputs A0 through A11 signals and a select signal. The A12 signal is generated based on the input select signal. The memory chip 20 is supplied with the A12 signal and the input A0 through A11 signals.