10 results about "Double frequency" patented technology

The present application relates to a kind of large specification 86CrMoV7 steel kind embossing roller processing technology, roller body processing method: roller body quenching and tempering piece-frame position-rough boring inner hole-half precision turning-outer circle grinding-magnetic exploration-double frequency quenching+tempering-precision turning frame position-precision boring inner hole-precision turning and shaft head hot mounting;Shaft head processing method: shaft head quenching and tempering piece-precision turning and roller body hot mounting.Processing method is adopted after roller body hollow double frequency quenching and then hot mounting, selects reasonable process parameter, solves the precision control problem of fit length and total length, avoids the quality problems such as quenching crack, deformation, uneven hardness easily appeared in hollow double frequency quenching process, effectively guarantees product quality, satisfies user demand.

The application relates to the technical field of signal processing, and provides a signal processing method and system of a rubidium atomic frequency standard, a main frequency standard adopts a double-threshold amplitude comparison circuit, a standby frequency standard adopts a single-threshold amplitude comparison circuit, and the existence of a signal, the validity of an amplitude and a locking state are synchronously monitored; double-threshold detection of the main frequency standard ensures reliability, single-threshold detection of the standby frequency standard ensures readiness for quick switching, and the reliability and switching efficiency are balanced; through preset logic rule fusion analysis, the validity is comprehensively judged in combination with a frequency standard locking signal. A control signal is generated based on a priority rule, the main frequency standard is kept when the main frequency standard is valid, a high-level pulse synchronized with a 10MHz signal zero-crossing point is generated when the main frequency standard is invalid and the standby is ready, an abnormal alarm is triggered when the double frequency standards fail, and the control signal is transmitted to a frequency standard switching circuit through a level conversion subunit, so that the trigger timing requirement of a high-speed switching module is met, quick response switching is ensured, the stability in the switching process is ensured, and the whole is reliable and stable.

The application provides a terahertz fundamental frequency and double frequency cooperative phase modulation super surface, device and system, relates to the generation and phase modulation technical field of terahertz waves, and the super surface comprises: a plurality of structure units, each structure unit is arranged on the same two-dimensional plane in a two-dimensional arrangement manner;The rotation angles of each structure unit relative to the same reference direction in the two-dimensional plane are not all the same;When the structure unit is subjected to circularly polarized terahertz wave incidence, the transmission end of the structure unit outputs terahertz waves comprising at least a fundamental frequency component and a second harmonic component, and the phases of the terahertz waves output by the structure units with different rotation angles are different.In the same super surface, a fundamental frequency signal with a frequency of a fundamental frequency and a second harmonic signal with a frequency of twice the fundamental frequency are generated, and the phases of the output terahertz waves are different by setting structure units with different rotation angles, so that the phase of the terahertz wave can be modulated while the frequency of the terahertz wave is doubled.

1. The name of the design product: optical fiber machine (double frequency 1.3). 2. The use of the design product: for optical fiber communication transmission. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model relates to wire drawing machine technical field discloses a feeding structure and double frequency conversion wire drawing machine, including feeding base, the downside of feeding base is provided with drive component, and drive component fixed mounting is in wire drawing machine one side end, be provided with the temporary storage component on feeding base, and the one side end of temporary storage component is provided with guide component, and be provided with firm component on temporary storage component, the utility model discloses through setting up temporary storage component, utilize sleeve, pivot and temporary storage disc constitute special material temporary storage space, cooperate the silk thread disc on the central shaft, can realize the orderly temporary storage of wire rod when feeding and wire drawing rhythm do not match, avoid the accumulation or slackening, the first guide shaft and second guide shaft in guide component cooperate with each other, can carry out stable direction to wire rod, ensure that the feeding path is neat, reduce wire rod deviation, firm component can through U firm mouth, fixed boss and the rotating drum of band joint slot, can the wire rod stable location, prevent the appearance of falling or shaking in the feeding process.

This invention discloses a method and system for suppressing second-harmonic voltage ripple in power electronic transformers based on virtual parallel impedance, aiming to solve the problem of excessive voltage ripple in submodule capacitors of common-frequency chain power electronic transformers. Without adding additional passive filtering components or active power decoupling circuits, virtual parallel impedance feedforward control is introduced into the primary-side port voltage control loop of the isolation-stage modular multi-active bridge converter to reshape the closed-loop input impedance characteristics of the port. A bandpass filter is used to extract the second-harmonic voltage component, and a virtual admittance gain is applied to make the converter port exhibit low impedance characteristics at second-harmonic frequency, thereby guiding fluctuating power to preferentially flow to the common high-frequency AC bus. The natural coupling cancellation effect of three-phase fluctuating power at the bus significantly suppresses voltage ripple on the DC capacitor. This invention requires no additional hardware, effectively reducing the demand for capacitor values ​​and improving the power density and operational reliability of the transformer system.

A process for the generation of a second harmonic radiation from a fundamental radiation, comprising the following operating steps: providing one or more nonlinear crystals (C) that satisfy the condition of second harmonic generation (SHG) through noncritical phase matching; providing an optical phase actuator (A), positioned upstream or downstream of said nonlinear crystal (C) with respect to the main optical axis (O) of the nonlinear crystal, a step of varying one or more of said parameters of the optical actuator (A) over time by controlling the temperature of the optical actuator (A) itself, or by applying electric or magnetic fields to said optical actuator (A), determining said parameters of the optical actuator (A) for which said measured power is maximum with respect to the power measured during said plurality of measurements performed.