31results about How to "Achieve oscillation" patented technology

The invention relates to a circuit for transmitting an input voltage (36) from an electrical energy source (64) in a stator (4, 55) to a load (70) within a device (6) movable relative to the stator (4, 55) comprising an control element (34) for converting an input voltage (36) into a transmission voltage (9), a resonant circuit (24) for receiving the transmission voltage (9), wherein the resonant circuit (24) contains a capacitor (22) and a primary winding (10) of a transformer (8) and the transformer (8) having the primary winding (10) and a secondary winding (12), wherein the primary winding (10) is provided for transmitting the transmission voltage (9) to the secondary winding (12) and the secondary winding (12) is provided for supplying the received transmission voltage (20) to the load (70). According to the invention, the actuator element (34) is provided for detecting the input voltage (36) and adjusting the frequency (27) of the transmission voltage (9) based on a control characteristic (45) in such a manner that the amplitude of the load voltage (20) dropping at the load (70) remains substantially constant, wherein in the control characteristic (45) the transmission ratio (25) of the resonant circuit (24) is plotted over the frequency (27) to be adjusted.

The invention provides compositions and a preparation method of an extra-large mode area metaphosphate optical fiber, and belongs to the technical fields of optical materials and laser. The invention solves the problem that an optical fiber cannot meet a mode field with the diameter of over 100 mu m and single-mode transmission characteristic simultaneously in the prior art. The metaphosphate optical fiber comprises a fiber core consisting of phosphorus pentoxide, alumina, potassium oxide, barium oxide, calcium oxide, magnesium oxide and rare earth oxide in a certain molar percent, and a fiber core clad layer consisting of phosphorus pentoxide, alumina, potassium oxide, barium oxide, calcium oxide and magnesium oxide in a certain molar percent. The prepared fiber core preformed rod and clad layer preformed rod are sleeved and fused, and are subjected to surface processing and drawing treatment so as to form the metaphosphate optical fiber. The metaphosphate optical fiber has excellentthermal property, optical property, mechanical property and mechanical performance.

The invention relates to the technical field of rubber processing equipment, and specifically discloses a rubber breaker. According to the rubber breaker, a transmission adjustment assembly is arranged between a left tooth breaking roll and a middle flow distribution plate, a transmission adjustment assembly is arranged between a right tooth breaking roll and the middle flow distribution plate, and during the rotation of the left tooth breaking roll and the right tooth breaking roll, a V-shaped opening angle of an inverted-V-shaped structure of the middle flow distribution plate can be adjusted in a certain amplitude; in this way, the vibration of rubber to be broken is realized, and the problems of blockage and tooth clamping are prevented; meanwhile, a side-part flow distribution plate is connected with the left tooth breaking roll and the right tooth breaking roll through the transmission adjustment assemblies, and during the rotation of the left tooth breaking roll and the right tooth breaking roll, the side-part flow distribution plate is capable of carrying out reciprocating vibration in a certain amplitude in the left-right direction, and the axial vibration of the rubber atparts is also realized; and the blockage caused by the clamping of the rubber at a certain position is prevented by virtue of the rotation of the breaking rolls and the axial vibration of the rubber.

The invention discloses a composition of an oversized model area fluorphosphate optical fiber and a preparation method thereof. The composition of the oversized model area fluorphosphate optical fiber mainly comprises an optical fiber core part and an optical fiber cladding part. The formula comprises aluminium metaphosphate, calcium metaphosphate, lithium fluoride, barium fluoride, magnesium fluoride, strontium fluoride, zirconium fluoride, lanthanum fluoride, yttrium fluoride and rare earth oxides. The composition has the structure of gain guidance-refractive index anti-guidance, the diameter of the fibre core of the gain guidance-refractive index anti-guidance optical fiber is far more than the diameter (4-10 mu m) of the fibre core of the common monomode optical fiber, and the mode field area can be above ten thousands square microns. The core diameter is 100-500 mu m; the cladding is composed of multicomponent glass, and the cladding diameter is about 250-650 mu m; and the difference delta n between the fiber core and the cladding is less than 0.05-0.28% and solves the problem that the mode field diameter is more than 100 mu m and the problem of monomode transmission characteristics.

This invention provides a soft-magnetic multiple-film piezo-sensor and its process method, wherein, the piezo-sensor is a sandwich structure composed of central copper conductive layer, soft magnetic thin film coated on the surface of copper layer and top protection layer. When in process, it adopts photo etching technique to get the aligning signs of double side cover etching; it adopts thin film process technique and micro-electroplating technique to get soft-magnetic multiple-film piezo-sensor; it adopts physics etching technique to remove the under layer and adopts special chemical formula to wet etch the soft-magnetic multiple-film material to form piezo-sensor; finally it adopts silicon wet etching technique to form piezo-sensor micro structure.

The invention discloses a normally open micro-valve driven by microfluidic negative pressure, which comprises a valve body and a valve core. In the cavity, the valve core is hollow inside, and the valve core is deformed with the pressure inside and outside the valve core. There is a negative pressure input port on the valve core. / or the output end is blocked to close the valve. In the present invention, the negative pressure signal controls the on-off of the positive pressure signal, which can bring large deformation and high output variation; it is mainly used in microfluidic chips, with higher safety and reliability, and is easy to implement in similar digital circuits. Grounding, signal gain and other functions realize various functions such as NOT gate, AND gate and OR gate, and high-level applications such as storage and oscillation of pneumatic signals can be realized through the design method of equivalent circuit.

The invention discloses a frequency channel programmable LC_digitally controlled oscillator (DCO) circuit structure. An LC_DCO circuit comprises a cross-coupling tailless current source complementary programmable negative resistance module, a programmable inductor module and switched capacitor arrays. Firstly, inductors with different inductance values are selected to form a resonant cavity with a natural capacitor; then, current of a left branch circuit and a right branch circuit of a negative resistance circuit is modulated to generate negative resistance required for starting oscillation so as to achieve oscillation of an LC_DCO; and finally, effective capacitance values which are switched in the resonant cavity by the two different switched capacitor arrays are controlled, so that modulation of operating frequency ranges and tuning accuracy is achieved. The circuit structure has the characteristics of being programmable in output frequency channel and adjustable in tuning accuracy and the advantages of being small in achievement area, high in integration level and high in deign flexibility.

The present invention provides a composition of a super large mode area silicate fiber and a method of producing the same, the super large mode area silicate fiber mainly comprises a fiber core of a fiber part and a fiber cladding part. The formula of the super large mode area silicate fiber includes silicon oxide, boron oxide, alumina, leadoxide, kali, lanthana, yttrium oxide and rare earth oxide, wherein the structure of the super large mode area silicate fiber is gain-guided and index-antiguided; the diameter of the gain-guided and index-antiguided fiber core is greater than the diameter of a common single-mode fiber core (4 to 10 mum); the area of the mode field can reach up to more than 10,000 square micrometers; the core diameter ranges from 100 mum to 500 mum; the cladding is composed of multi-component glass, wherein the diameter of the cladding ranges from 250 mum to 650 mum; and the refractivity between the fiber core and the cladding is delta n < 0.05% - 0.28%. The embodiment of the invention solves the problem that the diameter of the mode field can be greater than 100 mum and satisfies the single mode transmission characteristic.

This invention relates to a manufacturing method for a huge magnet impedance effect magnet-sensitive device based on micro-electromechanical system (MEMS), which applies MEMS technology to process a double-face oxidized silicon chip to get an aligned symbol carved in double faces so as to increase the aligned accuracy when exposing, applies a quasi-LIGA photo etching technology and micro plating to prepare a zigzag sandwich structure FeNi / Cu / FeNi soft magnet multiplayer membrane material, applies physical etching to remove the substrate to avoid the erosion brought with wet etching and offsets the huge magnet impedance effective curves by selecting suitable magnets to make the magnet-sensitive device to work in the linear zone.

The invention relates to an optical parametric oscillator, which comprises a nonlinear optical material (1) with the double-zero dispersion wavelength, a high reflector (2), an output mirror (3), a parametric oscillation optical beam collimator (4), a parametric optical line width compressor (5), a pumped optical coupler (6), a lambda / 2 phase retarder (7), a laser power controller (8) and an optical isolator (9). The nonlinear optical material (1) has a double-zero dispersion wavelength and is arranged in a resonant cavity formed by the high reflector and the output mirror. The pumped opticalwavelength is in the anomalous dispersion regime of the photonic crystal fiber, thereby ensuring the phase matching conditions and generating the highly efficient four-wave mixing effect. For the parametric oscillation formed by simplifying the four-wave mixing, the wavelengths of the two parametric lights are respectively arranged at the double-zero dispersion wavelength of the photonic crystal optical fiber, thereby realizing the group velocity dispersion compensation of the parametric light, solving the problem of the ultra-short pulse dispersion compensation, and greatly reducing the pumping threshold.