51results about How to "Fast start-up" patented technology

The invention discloses a Coriolis mass flow meter cloud transmission digital signal processing device and method. The device comprises a Coriolis mass flow meter, wherein the Coriolis mass flow meter is provided with two magnetoelectricity sensors, a driver and a constant flow source, the two magnetoelectricity sensors transmit collected signals to a differential amplification circuit corresponding to the magnetoelectricity sensors, the differential amplification circuit transmits processed signals to a DSP through an AD sampling circuit corresponding to the differential amplification circuit, and the driver is in communicating connection with the DSP through a feedback type digital driving module. According to the method, digital driving is conducted by means of the feedback type non-linear gain control algorithm fast and stably, frequency is tracked with the Newton LMS algorithm in an adaptive mode timely and accurately with the accuracy capable of reaching 0.01%, and the accuracy of calculation of phase difference achieved by means of the DTFT algorithm with a temperature compensation function can reach the 0.02% industrial level. Therefore, the digital signal processing algorithm is a Coriolis mass flow meter signal processing method with high accuracy and strong timeliness.

The present invention discloses a crystal oscillator. The crystal oscillator comprises: a crystal, an oscillating circuit, a first driving circuit, and a second driving circuit, wherein the oscillating circuit comprises a first oscillating transistor and a second oscillating transistor; the first oscillating transistor and the second oscillating transistor are used for providing transconductance for oscillation starting of the crystal and maintenance of oscillation; the first driving circuit is used for generating a stable reference current; and the second driving circuit is used for supplyingan operating voltage to the oscillating circuit, and enabling the operating current of the first oscillating transistor and the second oscillating transistor to be a stable current according to the reference current; and the operating voltage is used to control the first oscillating transistor and the second oscillating transistor to operate in a subthreshold region.

The present invention is concerned with improved fuel cell stack assembly arrangements.

The invention relates to broadband phase-locked frequency source equipment, belongs to the frequency source technology field, and is used to solve the problems of the prior art such as high phase noises, low output frequency, and high costs. The broadband phase-locked frequency source equipment comprises a forward path and a feedback path. The forward path comprises a phase discriminator, a loop filter, and a voltage-controlled oscillator. The feedback path comprises a harmonic diode mixing circuit. After the phase-locked loop is locked, the broadband phase-locked frequency source equipment isused to output a stable frequency signal, and is used for down conversion of a radio frequency signal to a relatively low medium frequency signal to improve a frequency synthesizer phase noise. The harmonic diode mixing circuit adopts even order harmonics of a local oscillation signal and the radio frequency signal for mixing, and when the output frequency is high, a large frequency doubling device is not required to be additionally disposed on a local oscillation input end, and therefore costs are saved. The equipment has advantages of simple operation, strong universality, low production costs, and strong applicability.

The invention belongs to the technical field of microwave sources in high power microwave technology, and specifically relates to a high band magnetically insulated transmission line oscillator with fast microwave oscillation starting and saturation and high power capacity. The high band magnetically insulated transmission line oscillator provided by the invention is of a circular symmetry coaxial structure and is composed of an outer cylinder, a gradient choke cavity structure, a main slow wave structure, an extraction cavity structure, a cathode, a carrier cathode and an electron collector. According to the high band magnetically insulated transmission line oscillator provided by the invention, since the gradient choke cavity structure is adopted, and the distance of first interaction cavities is increased, an electron beam emitted by a starting point of the cathode can pass by the surface of a first cavity, and fast microwave oscillation starting and saturation can be realized; moreover, the high band magnetically insulated transmission line oscillator provided by the invention can effectively reduce a radio frequency field, reduce the radio frequency breakdown risk of the slow wave structure and effectively improve the power capacity of the devices; and the high band magnetically insulated transmission line oscillator provided by the invention further increases the length of the cathode, can reduce the average emission current density of the cathode and is conducive to improving the electron emission uniformity on the surface of the cathode and prolonging the service life of the cathode. These improvements have important significance of improving the output power and pulse width of high ban MIMO.

The invention relates to a fast oscillation starting circuit and method, a crystal oscillator and an integrated circuit. The quick oscillation starting circuit injects a first current signal consistent with the output clock frequency of a crystal oscillation module into the crystal oscillation module and comprises a driving circuit body, a frequency-locked loop circuit and a switching circuit, theinput end of the driving circuit body is connected with a crystal oscillation module, and the output end of the driving circuit body is connected with the frequency-locked loop circuit and used for receiving an output clock of the crystal oscillation module, amplifying the output clock and then inputting the amplified clock to the frequency-locked loop circuit for driving; the input end of the frequency-locked loop circuit is connected with the driving circuit, the output end of the frequency-locked loop circuit is connected with the crystal oscillation module through the switching circuit, and the frequency-locked loop circuit is used for receiving the amplified output clock, locking the output frequency as the frequency of the output clock and injecting a first current signal into the crystal oscillation module; the switch circuit is located between the frequency-locked loop circuit and the crystal oscillation module and is used for entering a disconnection state to disconnect the frequency-locked loop circuit and the crystal oscillator module after the crystal oscillation module completes oscillation starting. Injection locking is carried out from the outside, and oscillation starting of a crystal oscillator can be rapidly accelerated.

The invention discloses a vibration box of a brick making machine, which comprises a vibration box body fixed on a vibration platform, wherein two main shafts and two transmission shafts are arranged in the box body; one end of the two main shafts passes through the box body; belt pulleys are arranged at end parts of the main shafts; the main shafts and the transmission shafts are provided with a synchromesh gear respectively, and the synchromesh gears are meshed mutually; the rear ends of the two main shafts are provided with a flange plate respectively; and eccentric blocks are fixed on the synchromesh gears on the main shafts and end faces of both sides of the flange plates. When the vibration box operates, two main shafts of the vibration box are driven by a motor or a hydraulic motor through the belt pulleys to make synchronous reverse rotation, so that the vertical directional vibration of the vibration platform of the brick making machine and a casting box is realized. The vibration box has the advantages of large excentricity, small starting drag torque, quick vibration starting, short time of vibration starting and vibration stop and large exciting force.

The embodiment of the invention relates to the field of circuit design, and particularly relates to a crystal oscillation circuit and method and electronic equipment. The crystal oscillation circuit disclosed by the invention comprises an excitation signal generator, a broadband modulator and an oscillation amplitude detector, wherein the excitation signal generator is used for generating an excitation signal after a crystal oscillator is enabled, and inputting the excitation signal into the broadband modulator; the broadband modulator is used for modulating the excitation signal to generate amodulation signal and inputting the modulation signal into the crystal oscillator, and the difference between the frequency of the modulation signal and the frequency of the crystal oscillator is within a preset range; the oscillation amplitude detector is used for detecting the amplitude of an output signal of the crystal oscillator, and if the amplitude of the output signal of the crystal oscillator exceeds a preset amplitude value, the broadband modulator stops inputting the modulation signal to the crystal oscillator. According to the invention, by shortening the oscillation starting timeof the crystal oscillator and reducing the average consumption of the circuit, rapid oscillation starting is realized, resources are saved, and the service life of the device is prolonged.

The invention discloses a fast oscillation starting type programmable crystal oscillator circuit with low power consumption, and relates to the technical field of integrated circuits. The fast oscillation starting type programmable crystal oscillator circuit comprises: an independent current source is connected with a current control circuit, the current control circuit is connected with an amplifying circuit, a first output end of a crystal oscillator is connected with an input end of the amplifying circuit, a second output end of the crystal oscillator is connected with the output end of theamplifying circuit, the crystal oscillator is connected with a first comparator, the first comparator is connected with a second comparator, the second comparator is connected with a level conversioncircuit, the level conversion circuit is connected with a first inverter, the first inverter is connected with a counter and a AND gate, the counter is connected with a logic digital circuit, the counter is connected with the AND gate, the AND gate is connected with the second inverter, the second inverter outputs a signal, and the logic digital circuit is connected with the current control circuit. The fast oscillation starting type programmable crystal oscillator circuit disclosed by the invention has the advantages that when the amplitude of oscillation of the crystal oscillator is relatively large, some switches are turned off, continuous oscillation is maintained, fast oscillation starting is achieved by high current, and low current and low power consumption are achieved after the oscillation starting.

The embodiment of the invention discloses a crystal oscillation circuit capable of rapidly starting oscillation and an oscillation starting method. The crystal oscillation circuit may include a control portion, a ring oscillator portion, and a crystal oscillation portion, wherein the control portion is configured to provide a variable voltage or a variable current to the ring oscillator portion; the ring oscillator portion is configured to generate a control signal for injecting the crystal oscillation portion according to the variable voltage or the variable current, wherein the frequency ofthe control signal changes from high to low along with time, and the change range covers the corresponding target frequency when a crystal oscillator in the crystal oscillation portion starts to oscillate; and the crystal oscillation portion is configured to reduce the frequency corresponding to the control signal to the target frequency, and promote the crystal oscillator to start oscillation based on the control signal and resonance energy generated by the crystal oscillator in the crystal oscillation portion.

A fast start-up circuit and a method of a flyback power supply utilize a charging current that is related to an input voltage of the flyback power supply to charge a control terminal of a power switch of the flyback power supply during a start-up mode. Accordingly, the power switch can be switched, and a supply voltage of the flyback power supply rises. When an output terminal of the flyback power supply occurs a short circuit, the fast start-up circuit and the method of the present invention will decrease a maximum of a current through the power switch, thereby avoiding that the power switch is overheating.

This invention relates to a temperature controlled heat accompany cable including two parallel metal conduction leads characterizing in squeezing a PCT layer uniformly on the two leads, setting an insulation layer on the PCT layer, a shield layer on the insulation layer and a jacket on the shield layer. Advantages: 1, realizing continuous production of long temperature controlled heat-accompany cables with stable quality, 2, small starting current, 3, uniform temperature, 4, electric energy saving, quick rising of temperature, 6, low cost in mounting and moving, 7, no environment pollution.

The invention discloses a high-torque-output fuel-saving energy-saving piston engine which comprises an output shaft, a first burning acting cylinder and a second burning acting cylinder; the output end of the first burning acting cylinder and the output end of the second burning acting cylinder are each connected with a rack and pinion device and a rotating crank compression device; each rack and pinion device comprises a power rack and a power pinion; the other end of each power rack is in external engagement with the corresponding power pinion; the power pinions sleeve the output shaft; each rotating crank compression device comprises an air rotary compression link rod, an air compression gear, an air compression semi-circle gear and a rotating crank; the other end of each air rotary compression link rod is hinged to the corresponding rotating crank; each air compression gear is in external engagement with the corresponding air compression semi-circle gear; and each engagement disconnection control pressing wheel is matched with the corresponding power rack. High torque output is realized, large bore pre-suction and prepressing are adopted, high pressure and low temperature parameter operation is realized, environmental protection and energy saving are facilitated, and the power is high.

The invention discloses a millimeter wave super-regenerative receiver with a high data rate, which relates to a millimeter wave transceiving technology of a new generation of information technology. The scheme is provided for solving the problems of small dynamic range, supe-regenerative oscillator SILO residue, pre-stage circuit inter-code crosstalk and the like in the prior art. A low-noise amplifier is directly connected with a radio frequency input signal; the super-regenerative oscillator adopts a cross-coupled oscillation structure, and a symmetrical MOS tube switch is connected in parallel at a resonant cavity and is controlled by a quenching signal. The receiver has the advantages that the receiver can work at a high code element rate; the dynamic range is relatively large; high-order digital modulation can be realized; spectrum leakage of the receiver is prevented; and the receiver is relatively simple and has relatively high flexibility.

The embodiment of the invention discloses a linear motor, and the linear motor comprises: a shell; and a vibration unit and at least two displacement determining assemblies, wherein the vibration unitand the at least two displacement determining assemblies are located in the shell, each displacement determining assembly comprises an induction coil and a first magnet, each displacement determiningassembly is arranged along two opposite sides of the vibration direction of the vibration unit, and when the vibration unit vibrates, the induction coil and the first magnet act together to generatean induction current for determining the displacement of the vibration unit in the vibration direction. The embodiment of the invention further discloses a control method of the linear motor, a driving circuit and electronic equipment.

The invention discloses a vehicle steering wheel haptic feedback system and a feedback method thereof. According to the haptic feedback system, linear vibration motors are embedded into a steering wheel, and haptic feedback is conducted through vibration of the linear vibration motors. The feedback method comprises a common feedback mode, a break-off feedback mode and an emergency feedback mode; when a vehicle auxiliary system needs to be subjected to information feedback, a feedback request is sent to a vehicle controller ECU, the vehicle controller ECU starts the different feedback modes according to the feedback request, accordingly, different control signals are generated, and the linear vibration motors embedded in the steering wheel are driven to work. According to the vehicle steering wheel haptic feedback system and the feedback method thereof, the linear vibration motors are connected with the vehicle controller ECU through signal wires, various different haptic signals can be fed back, and the man-machine interaction mode between a driver and a vehicle is enriched.

The invention provides a high-power electronic cigarette and a quick starting method thereof. The high-power electronic cigarette comprises a main machine and a smoke cartridge, the smoke cartridge isdetachably installed on the main machine. A control module is arranged in the main machine; the control module is in communication connection with the smoke cartridge; the main machine and the smokecartridge jointly form a smoke suction channel. An air pressure sensing piece connected with the control module is arranged in the main machine. The air pressure sensing piece is arranged on a path ofthe smoking channel, when airflow passes through the air pressure sensing piece, the air pressure sensing piece is triggered, the air pressure sensing piece sends a signal to the control module; andwhen the control module receives the signal, the smoke cartridge is controlled to be started. The air pressure sensing piece can sense the air pressure change so as to send a signal to the control module, then the control module controls the smoke cartridge to be started; the whole starting process is rapid and smooth, and the trouble of pressing a mechanical key is omitted.

The invention provides an inverter power supply circuit. Fast conversion from the direct current to the alternating current is achieved by the matching of a field-effect tube Q1 and a field-effect tube Q2, the breakover current of the Q2 is directly lowered through the Q1 before the Q2 is connected, and thus a winding on the right side can generate induced electromotive force. The polarity of the voltage on the left side is positive and the polarity of the voltage on the right side is negative. The current arrives at a resistor R4 on the left side through the winding intersection, and then arrives at the tail portion of the winding after reaching the grid electrode of the Q2, and hence a circuit is formed. In this way, the Q2 is connected, the starting of oscillation is achieved from the Q, and therefore the problem of overlong delay is solved. By means of the inverter power supply circuit, and fast oscillation starting can be achieved; besides, the problem that currents are too high under the condition of too-high load power is solved.

The invention discloses a vehicle detector circuit, which comprises frequency selection circuits and a positive feedback circuit, wherein a first frequency selection circuit consists of a fifth resistor, a second capacitor and a first primary winding coil of a transformer and is used for the frequency selection of an electrified pulse; a second frequency selection circuit comprises a parallel inductor connected with an external coil and an electrolytic capacitor connected with the parallel inductor and is used for primary frequency selection; the positive feedback circuit comprises a secondary winding coil of the transformer, and is coupled by the first primary winding coil of the transformer and then is fed back to the base of a triode through a polar capacitor; the collector of the triode is connected with the first frequency selection circuit; and a second primary winding of the transformer is connected with the second frequency selection circuit. Due to the frequency selection circuits and the positive feedback circuit, the vehicle detector circuit is high in reliability, fast in oscillation starting, high in frequency stability and low in drift.

The invention belongs to the technical field of electric heat tracing bands and specifically relates to a high temperature self-regulating electric heat tracing band. A technical problem which needs to be solved in the invention is to put forward a high temperature self-regulating electric heat tracing band so as to solve a problem that a conventional high temperature self-regulating electric heattracing band is high in production cost. To solve the above technical problem, the invention puts forward the high temperature self-regulating electric heat tracing band comprising a PTC material layer, an insulation layer, a metal wire shielding layer and a protection sleeve layer; the PTC material layer is of a flat structure, and two parallel buses are wrapped in the PTC material layer. The band disclosed in the invention has effects of low installation and operation costs and convenient-to-maintain property.

The invention provides an inverter power supply circuit capable of preventing too high load power. Rapid transformation between DC to AC is realized through cooperation between a field effect transistor Q1 and a field effect transistor Q2, before the Q2 is conducted, the Q1 directly draws low conduction currents of the Q2, in such a way, a winding at the right side generates an induction electromotive force, the polarities of voltages are positive at the left and negative at the right, currents flow from the intersection point of the winding to a resistor R4 at the left, to the grid of the Q2 and then to the tail of the winding so as to form a loop, thus the Q2 is conducted, oscillation starts from Q, and the problem of too long delay is avoided. The inverter power supply circuit provided by the invention can realize rapid start of oscillation and overcomes the problem of too high currents caused by too high load power.

The invention relates to a crystal oscillator circuit based on phase-locked loop injection, which adopts a quickly locked digital phase-locked loop, and comprises the following steps of: firstly, injecting the output of a numerical control oscillator into a crystal to realize the first-step energy injection, then, using a crystal oscillator as a reference clock of the phase-locked loop to realizethe second-step energy injection, and therefore, the frequency and the phase of the numerical control oscillator are locked as the frequency and the phase of the crystal oscillator, and then second-step energy injection is performed on the crystal, so that the crystal starts oscillation quickly in a short time, relatively large output swing and relatively good phase noise are realized on the premise of ensuring low power consumption, and the problem that the injection frequency of a traditional oscillator is inaccurate is solved.