8results about How to "Phase stable" patented technology

The invention discloses a double-field quantum key distribution system. The double-field quantum key distribution system comprises a Charlie end, an Alice end and a Bob end, the invention also discloses a double-field quantum key distribution method which is realized based on the double-field quantum key distribution system. The invention discloses a double-field quantum key distribution system and method, and the method comprises the steps: carrying out the interference of uncoded signal light transmitted and returned by an Alice end and a Bob end at a Charlie end, and feeding back a phase drift distance according to an interference result to compensate the phase drift of the coded signal light during the transmission in an optical fiber, thereby achieving the stable phase, and achieving the high-precision transmission of the coded signal light. The method can adapt to an operation environment with dramatic phase change in long-distance transmission, and the stability and the high efficiency of a quantum network and a transmission link are improved.

The present invention discloses a phased array weather radar and an amplitude and phase calibration system and method thereof, and relates to the technical field of weather radars. The system includes a signal processing unit, a transmitting channel main link, a receiving channel main link, a radar antenna, a first calibration link, a second calibration link, a circulator and a coupler; the transmitting channel main link and the receiving channel main link are respectively connected to the signal processing unit, and the transmitting channel main link and the receiving channel main link are also respectively connected to the circulator; the first calibration link and the second calibration link are respectively connected to the signal processing unit, and the first calibration link and the second calibration link are also respectively connected to the coupler; the coupler is connected to the circulator and the radar antenna; the first calibration link or the second calibration link is arranged in a constant temperature chamber. The ambient temperature of the first calibration link or the second calibration link of the present invention is stable, which improves the amplitude and phase calibration accuracy of each transmitting channel and each receiving channel.

The present invention relates to an aircraft in-situ laser cleaning auxiliary tooling, comprising a tooling body, a laser generating component, a support component with a hollow middle portion, and a walking component. A light exit hole is provided at one end of the tooling body, the laser generating component is arranged in the tooling body, one end of the support component is connected to the outer wall of one end of the tooling body with the light exit hole, the other end of the support component is installed with the walking component, and a through hole is provided in the middle of the walking component. The laser emitted by the laser generating component passes through the light exit hole and then irradiates the surface of the cleaning object through the through hole in sequence, and cleans the surface of the cleaning object as the walking component walks on the surface of the cleaning object. The present invention irradiates the surface of the cleaning object with laser, and can be moved on the surface of the cleaning object more conveniently through the walking component, thereby reducing labor intensity. The distance from the light exit hole to the surface of the cleaning object can be ensured to be constant through the support component, thereby achieving a constant cleaning position, improving cleaning efficiency, and ensuring a cleaning effect.

The invention relates to the technical field of food processing, and in particular to a method for preparing a microalgae plant milk beverage, comprising: S1, selecting fresh microalgae in which protein accounts for ≥40% of cell dry weight, oil accounts for ≤15% of cell dry weight, and starch accounts for ≤30% of cell dry weight; S2, preparing algae pulp with drinking water, breaking algae cells with a high-pressure homogenizer to obtain broken algae pulp; S3, adding water to dilute the broken algae pulp, adding 350-5000 units / kg of cellulase, 500-50000 units / kg of protease, 500-3000 units / kg of amylase and 1000-3000 units / kg of saccharifying enzyme to carry out enzymolysis based on the weight of the diluted algae pulp, and after the reaction is completed, adding an additive of less than 5g / 100mL, stirring and mixing evenly; S4, heating to 50-80°C, and homogenizing again; S5, sterilizing and filling to obtain a finished product. The present invention adopts microalgae with high protein content to prepare a plant milk beverage, and the protein / oil or protein / starch ratio of the plant milk beverage is reasonable, thereby making up for the problem of low protein / calorie ratio of the plant milk beverage.

The present invention provides a method for preparing a sodium vanadium phosphate positive electrode material and its application in preparing a sodium positive electrode material. The preparation method comprises the following steps: mixing and grinding a phosphorus source, a sodium source, and a vanadium source to obtain a ground mixture A; mixing a carbon source and continuing to grind to obtain a ground mixture B; sieving the mixture B, adding an abrasive to rinse, drying and grinding the obtained suspension of a mixed precursor and an abrasive to obtain a precursor powder; sintering the obtained precursor powder to obtain a sodium vanadium phosphate positive electrode material. The method of the present invention is simple to operate and low in cost, and can realize the recycling of phosphorus sources after recycling and processing of waste lithium batteries, generating less waste, being economical and environmentally friendly. The preparation method of the present invention is more direct, convenient, safe, and low-cost. After ball milling, sintering can perfectly realize the preparation of sodium vanadium phosphate by adjusting the amount of carbon source added and the inert gas filling time.

The present application relates to the field of industrial control technology, disclose a kind of electron beam power self-adapting regulation control method and system, the method includes: real-time acquisition electron beam processing workpiece beam amplitude, power output voltage, focusing coil current, according to fixed time window construction power timing adjustment sequence;Beam amplitude variation rate deviation is analyzed based on timing adjustment sequence, obtain amplitude deviation, closed-loop control output voltage, obtain power amplitude correction amount;According to beam amplitude drop rate analysis power output carrier phase characteristics, real-time calibration phase, obtain power phase correction amount;Phase correction amount is mapped as focusing coil current constraint adjustment coefficient, according to amplitude deviation variation gradient setting threshold, obtain focusing current constraint amount;According to beam amplitude drop rate dynamically weighted setting each correction amount, constraint amount, obtain power fusion driving control amount;Fusion driving control amount is input into power control terminal, complete electron beam power self-adapting regulation control.

The invention discloses an air conditioner. The air conditioner comprises a load; the input end of the power circuit is connected with a single-phase power grid, and the output end of the power circuit is connected to the load; the power grid parameter detection module comprises an orthogonal signal generator which is used for converting the alternating-current input power grid voltage into orthogonal voltage signals V alpha and V beta under an alpha-beta shaft system; the Park conversion module is used for converting the orthogonal voltage signal into voltage components Vd and Vq under a synchronous rotating coordinate system; the per-unit phase locking module is configured to perform filtering on the voltage component Vd to obtain a power grid voltage amplitude Vs; performing per-unit processing on the voltage component Vq to obtain a per-unit value, and performing filtering and PI adjustment on the per-unit value in sequence to obtain a power grid voltage frequency omega; and performing integral adjustment on the frequency omega to obtain a power grid voltage phase theta. The power grid parameter detection module is used for power grid parameter information detection, and has the advantages of being high in anti-interference capacity and high in reliability.

The present invention relates to the field of microwaves, and in particular to a method for automatic phase stabilization of a broadband radio frequency microwave channel. The phase shift circuit of the present invention is composed of a controllable time delay device and a controllable phase shifter connected in series, and the front and rear positions of the controllable phase shifter and the controllable time delay device are interchangeable; the controllable time delay device is used to perform a certain amount of delay processing on the received broadband radio frequency microwave signal; the controllable phase shifter is used to perform a certain amount of phase shift processing on the received broadband radio frequency microwave signal; and the phase of the broadband radio frequency microwave channel with different temperature phase characteristics is automatically stabilized or compensated. This technology overcomes the limitation that the phase shifter cannot be used to quickly and automatically compensate the phase of the instantaneous broadband radio frequency microwave channel under different temperature phase characteristics, and can stabilize or automatically compensate the phase of the broadband radio frequency microwave channel with different temperature-phase characteristics.