62 results about "Double switching" patented technology

The invention discloses a quadrature error closed-loop compensating circuit for a vibrating type silicon micromechanical gyroscope. A gyroscope detection signal enters a synchronous demodulation circuit by diving into two parts after being amplified and filtered: one part of gyroscope detection signal is demodulated through reference signals generated by a phase-locked loop, and after low-pass filtering is performed, an angular velocity signal is obtained; the other part of the gyroscope detection signal is demodulated through the reference signals, which is subjected to phase displacement for 90 degrees, and generated by the phase-locked loop, after low-pass filtering is performed, the voltage amplitude of quadrature error signals in the detection signal is extracted out, and a feedback control voltage is obtained through an integrating circuit; the feedback control voltage passes through a single-double switching circuit and is modulated to the driving frequency through a driving detection capacitance so as to generate a feedback current to compensate quadrature displacement current in the detection shaft direction, and then quadrature error amount in the detection signal is eliminated and finally, the pure angular velocity is obtained. According to the invention, the quadrature error amount in an angular velocity detection loop is eliminated by using the feedback current to compensate the quadrature displacement current in the detection shaft direction of the micromechanical gyroscope, and high-precision closed-loop compensating for the quadrature error of the vibrating type silicon micromechanical gyroscope is achieved.

A double-switching heater includes a double-switching PTC ink deposited on a substrate to form one or more resistors. The double-switching PTC ink has a first resin that provides a first PTC effect at a first temperature range and a second resin that provides a second PTC effect at a second temperature range, where the second temperature range is higher than the first temperature range. The substrate may be a flexible substrate or a rigid substrate, and may bedeformable to generate a three-dimensional structure. The substrate may be: polyester, polyimide, polyamide, polypropylene, thermoplastic polyurethane, fiberglass, cement board, carbon composite materials, polyethylene terephthalate, polyethylene, aluminum, steel, glass composite, molded plastic, high-density polyethylene or styrene ethylene butylene styrene.

The invention discloses a dynamic body-bias Schmitt trigger circuit which utilizes a body-bias technique to control the body-area voltages of a first NMOS transistor (10), a first PMOS transistor (11), change the threshold voltages of the first NMOS transistor (10) and the first PMOS transistor (11) and further form the Schmitt trigger circuit with a double-switching threshold value. When an input signal is a lower electric level, under the action of a second NMOS transistor (12), a second PMOS transistor (13), an NMOS body control circuit (14) and a PMOS (15) control circuit, a Schmitt trigger presents a high switching threshold value V+; and similarly, when an input signal is a higher electric level, under the action of the second NMOS transistor (12), the second PMOS transistor (13), the NMOS body control circuit (14) and the PMOS (15) control circuit, the Schmitt trigger presents a low switching threshold value V-.

The invention discloses a network design method of an airborne multi-topology double switching structure, and belongs to the field of aircraft integrated control technology. The design method comprises a topological structure, a protocol level, redundancy configuration and management mechanism of an airborne system high speed transmission network, a hybrid topological structure formed by a point-to-point access network, a switching access network and an annular bus access network is used for realizing the communication and processing among sub-systems and modules of aircraft management, thereby ensuring the reliability and the stability of the airborne system network, satisfying the real-time requirements of the sensors, function units and subsystem functions of the aircrafts, and the transmission matching requirements of the high speed data processing system and a large amount of real-time data information, therefore the objective of information sharing and function integration is realized by information interconnection, the high speed transmission of large-capacity airborne data with high reliability is realized, the function limit of the original airborne system is broken, and the integration of the airborne system and the sharing of data, hardware and other resources are promoted.

The invention provides a switching method, a base station, and a mobile management body, which belong to the technical field of wireless communication. The method comprises the steps of receiving a first switching requirement message sent by the base station, wherein the first switching requirement message includes a single wireless voice communication continuity SRVCC switching instruction, divided into a grouping switching PS and a circuit switching CS; sending the message of switching failure when the PS switching preparation required by the first switching requirement message fails (the message of switching preparation failure only requires circuit switching CS); receiving a second switching requirement sent by the base station (the SRVCC switching instruction included by the second switching requirement is only CS). The invention is advantageous in that when the mobile management body determines that the data and voice switching failed, the base station resend a voice single switching requirement, and thereby the mobile management body can conduct voice switching, and communication interruption due to the failure of double switching of data and voice can be prevented.

The invention discloses a fire hazard automatic alarm and linkage control system. The system comprises a fire hazard alarm controller, a private line linkage control panel and a bus isolation module. The bus isolation module is connected with a bus interface module, a hand-operated alarm button, an audible-visual annunciator, a signal input interface module and a signal output interface module. The bus interface module is connected with a point-type smoke-sensitive fire detector and a point-type temperature-sensitive fire detector. The signal input interface module is connected with a fire-fighting signal butterfly valve, a pressure switch, a fireproof valve, a hydrant button, a water flow indicator and an explosion-proof type flame detector. The signal output interface module is connected with a roll-up door motor, a smoke evacuation valve, a strong electric switch and an alarm bell. The private line linkage control panel is connected with a fire-fighting broadcast, a fire-fighting telephone and a linkage double-switching module. The linkage double-switching module is connected with a smoke ventilator, a new fan, a fire-fighting pump and a spray pump. The fire hazard automatic alarm and linkage control system has the advantages of high intelligentization degree, rapid response, high reliability, high practicality, and convenient popularization and application.

An electromagnetic dual-action control valve with a housing (2), with connections (15, 16, 17) for inflow and outflow lines for a pressure medium, with a solenoid (3) and with two armatures arranged to move within the solenoid (3) for opening and closing the line connections. To simplify the structure of such a dual-action control valve, it is provided that one of the armatures is formed as a hollow armature (4) with a closed end (11), within which an inner armature (5) is arranged to move coaxially, and the hollow armature (4) has openings (20, 21) for the pressure medium, of which one opening (21) can be closed by a sealing surface (13) of the inner armature (5).

The invention discloses an electric iron capable of quickly raising and reducing temperature. The electric iron comprises an electric iron main body; the bottom of the electric iron main body is provided with an ironing board; a halide torch heating body is arranged above the ironing board; the electric iron main body is provided with a steam forming device which is provided with a water outlet valve; the ironing board is provided with a steam orifice communicated with the bottom surface of the ironing board; the steam orifice is communicated with the steam forming device; the thickness of the ironing board does not exceed 2.0 millimeters; and the ironing board is an aluminum alloy ironing board. The halide torch heating body has high heating speed, high heat efficiency and long service life, and the electric iron has long service life; the ironing board is made of aluminum alloy and small in thickness, the electric iron has high temperature rise speed and temperature reduction speed,the scald probability is reduced, heat loss is small, and using cost is low; the electric iron is provided with a binary switch, and is used more safely; and the electric iron is provided with a color changing coating to display the temperature of each part of the electric iron, so that the electric iron is more convenient to use and effectively prevents scald.

The present invention relates to an extruder arrangement having a drive motor and a switching gear (3) which is provided with an input shaft (21) and an output shaft (35). A double switching pinion (25) is arranged between first and second switching positions on the input shaft (21) in moving manner but not rotated against the input shaft. In each gear, a switching pinion (41, 42) is directly joggled to a shift gear (33, 33') of a central shaft (29, 29'), thereby rotating to the output shaft (35) from the central shaft.

The invention discloses a small dual single-pole double-throw coaxial electromechanical switch comprising a control circuit assembly, a relay assembly, a microwave signal transmission channel assembly, and a shell. The relay assembly is formed by combining relay assemblies of two single-pole double-throw switches. The microwave signal transmission channel assembly comprises a cavity assembly and a mounting board assembly, the mounting board assembly is formed by combining mounting board assemblies of two small single-pole double-throw switches, and the cavity assembly is formed by combining cavity assemblies of two small single-pole double-throw switches. The electromechanical switch of the invention adopts a relay assembly combination structure and a microwave signal transmission assembly combination structure, is integrated with two small single-pole double-throw switches which can be regarded as a small switch matrix, and can achieve the functions of a variety of forms of switches. A smaller dual switch is achieved, and the minimum size of the dual single-pole double-throw coaxial electromechanical switch can be 22.2mm*33.8mm*57.2mm.

The invention discloses a double-switching-pulse type femtosecond optical Kerr-gate and an implementation method thereof. The double-switching-pulse type femtosecond optical Kerr-gate and the implementation method thereof have the advantages that switching pulse of a traditional optical Kerr-gate is divided into two beams, an optical path of a first switching pulse beam is as same as traditional switching light, a polarization direction of a second switching pulse beam is adjusted to be perpendicular to a first switching light polarization direction through a half-wave plate, and attenuation slices and optical delay lines can adjust the intensity and the optical length; the second switching pulse beam is introduced, the intensity and relative delay time of the second switching pulse beam are adjusted continuously relatively to the first switching pulse beam, and then the optical Kerr-gate is effectively controlled by the second switching pulse beam in a first switching pulse excitation turn-off phase, so that transmittance of the optical Kerr-gate can mainly depend on the first switching pulse beam, switching-off time of the optical Kerr-gate is greatly shortened under regulation of the second switching pulse beam, and high transmittance and ultrafast switching time of the femtosecond optical Kerr-gate are achieved.

The invention discloses a fan-shaped vector control method capable of suppressing series connection combination type MMC ring current. On the basis of a classical modular multilevel converter (MMC) series connection structure, a relation between the series connection combination type MMC and a power supply is analyzed to obtain a theory that the current between the series connection combination type MMC and the power supply is overlaid with double switching frequency ring current, so that a fan-shaped vector control strategy is proposed. By virtue of the fan-shaped vector control method, the double switching frequency ring current overlaid between the series connection combination type MMC and the power supply can be suppressed and input current fluctuation can be reduced; and meanwhile, the control strategy is verified in a serial-in parallel-out type MMC-H bridge DC/DC conversion module, and high practicability, simple control and high reliability are shown.

The invention relates to a double-switching type tension indication wire grip. According to the wire grip, two single-station wire grip bodies are in mirror connection. According to each single-station wire grip body, a retrieving mechanism is arranged at one end of an operation handle, the other end of the operation handle is movably connected to a gear chuck, the gear chuck is connected with a wire spool, a steel wire rope is wound around the wire spool and is connected with a wire clamp through a pulley, and a hanging ring is installed on the wire clamp. One side of the wire spool of one single-station wire grip body is connected with one side of the wire spool of the other single-station wire grip body through a lead screw and a connecting steel plate, a fixing hook is connected to the connecting steel plate, and a tension meter and a protection steel wire rope are arranged between the connecting steel plate and the fixing hook. According to the wire grip, each single-station wire grip body can achieve wire gripping independently through the corresponding operation handle, the two single-station wire grip bodies can achieve double switching together, the structure is simple, cost is reduced, practicality is high, manufacturing is convenient, a large amount of labor is saved, and wire gripping can be achieved by a single person.

The invention discloses a two-way liquid flow and double switching filtration system which comprises two two-position three-way valves, a liquid pump, an electric-contact pressure gauge and a double switching filter component. The double switching filter component is adopted in the invention to ensure that when one filter works, the other filter is in the standby state; when a failure occurs, the filter can be temporarily adjusted to the other filter, so that the maintenance is convenient on one side, and the working efficiency is further improved simultaneously. Simultaneously, the two two-position three-way valves are adopted outside the double switching filter component, thereby realizing the effect of filtering two-way liquid flows of the same pipeline, obviously improving the utilization rate of resources and lowering the production and operation costs.

The invention provides a dual-supply change over switch operating mechanism. The dual-supply change over switch operating mechanism comprises an upper switch body, an upper rocking arm, a square shaft, a rotating shaft, a lower connecting rod, a lower rocking arm, an upper connecting rod and a lower switch body, wherein the square shaft is fixed on the rotating shaft, and the rotating shaft is provided with the upper rocking arm and the lower rocking arm; the upper rocking arm passes through a waist-shaped groove in the upper connecting rod and is pivoted to one end of the upper connecting rod, the lower rocking arm passes through a waist-shaped groove in a lower connecting rod and is pivoted to one end of the lower connecting rod 7, and the upper rocking arm and the lower rocking arm are arranged in an angle of 90 degrees; the other end of the upper connecting rod is connected with the upper switch body, and the other end of the lower connecting rod is connected with the lower switch body; and the square shaft rotates in an anticlockwise manner, when the upper rocking arm drives the upper connecting rod to be pushed to the left, the upper switch body is switched on, and when the square shaft rotates in a clockwise manner, the upper rocking arm drives the upper connecting rod to be pulled towards the right while the lower rocking arm drives the lower connecting rod to be pushed towards the left. The dual-supply change over switch operating mechanism has the following advantages: both manual operation and electrical operation are realized, it can be ensured that two switches are not simultaneously switched on, installation of a mechanical interlock is unnecessary, double switching-off positions exist, the structure is simple, and the safety and the reliability are high.

The invention is applicable to the field of lamp detection and provides an automatic detection circuit and an automatic detection device for the life of an emergency lamp. The automatic detection circuit comprises a counting unit and a switching control unit, wherein two power ends of the counting unit are connected with an alternating-current power supply, the counting unit is used for recording the number of switching between the power output of the alternating-current power supply and the power output of a direct-current power supply; and a power supply end of the switching control unit is connected with a public end of the counting unit, double switching ends of the switching control unit are connected with double counting ends of the counting unit, and the switching control unit is used for automatically switching the power output of the alternating-current power supply and the power output of the direct-current power supply. According to the invention, the switching control unit is used to set test time to control the power switching between the direct-current power supply and the alternating-current power supply of the emergency lamp, and the counting unit is used to carry out switching counting, so that the automatic detection control over the service life of the emergency lamp is realized, and the detection accuracy and the detection efficiency are improved.

In a fuel cell system, an adhesion detection apparatus for detecting adhesion of a second switching valve for a sub tank is provided. The adhesion detection apparatus opens a first switching valve and a second switching valve for switching to a double switching valve open state where a fuel cell performs power generation, and thereafter, closes the first switching valve and opens the second switching valve for switching to a second switching valve open state where the fuel cell performs power generation, and detects adhesion of the second switching valve based on a change of a detection value of a pressure sensor in the second switching valve open state.

The invention relates to a vacuum tube gate-control modulator implementing method based on optical fiber couplers. In a vacuum tube transmitter, a gate-control modulator usually needs to be used for carrying out modulation on a gate electrode of a vacuum tube so as to control working of the vacuum tube, and the gate-control modulator simultaneously has the difficult problems of high-voltage isolation, high-voltage amplification and waveform quality. According to the invention, firstly, a low-potential modulating pulse and a chopped pulse are formed at a low-voltage circuit, and two groups of optical fiber couplers and a certain length of optical fiber are adopted to implement high-voltage isolation transmission of the modulating pulse and the chopped pulse; and secondly, two groups of optical isolation MOSFET driving chips and MOS tubes are adopted to carry out amplification and shaping on the modulating pulse to form a high-potential high-voltage modulating pulse. A principle of the method disclosed by the invention is as shown in the accompanying drawings. According to the invention, due to a case of adopting the optical fiber to carry out high-voltage isolation, the vacuum tube gate-control modulator implementing method has the advantages of high withstand voltage and resistance to striking impact; a photoelectric device is easy to implement the wide-pulse high-duty-ratio modulator; and output adopts a double-switching-tube opposite-pulling shaping circuit so as to well solve the problem of waveform of the modulating pulse.

The invention discloses a pushing-out type portable arc igniter. Ignition heads are arranged at the front end of an ignition pushing-out device. A lighting lamp and the ignition heads are horizontallyarranged in parallel. The ignition heads are set as two parallel cylinders, and a ceramic fixing device is arranged on the surfaces of the ignition heads. A body plastic piece of the ignition pushing-out device is set to be a cuboid with the upper surface and the right surface opened. A high-pressure bag and a circuit board are arranged in the body plastic piece, a polymer lithium battery is arranged above the circuit board, and a lighting lamp switch is arranged at the middle position of the left end of the circuit board. A power safety switch, a charging indicator lamp and a USB charging interface are arranged at the right end of the circuit board. A tail plastic piece is arranged to be in an L shape and connected with the ignition pushing-out device through a spring. The pushing-out type portable arc igniter is simple and compact in structure, small in size and weight and convenient to carry and use, dual switch control is adopted, safety performance is good, the misoperation is effectively avoided, and potential safety hazards are eradicated. A charger can be carried along, repeated charging is conducted, and the service life is long.