35results about How to "Cycle stable" patented technology

The invention discloses a technology of processing a magnesium alloy with high intensity and flexibility, which subsequently includes vacuum melting, continuous casting, extrusion, forging and such procedures. The invention reasonably matches the solution body composition and the metamorphism liquid during casting process, and the grains are refined through the chilling action of a crystallizer at first; the magnesium alloy liquid is transmitted by an electromagnetic pump so as to prevent secondary oxidation and ensure safety in casting of the magnesium alloy; and then further refining the grains through electromagnetic mixing power, large ratio extrusion and heat treatment secondary crystallization, which effectively ensures tiny enough isometric crystals can be obtained from the alloy microstructure. The magnesium alloy elements of the automotive steering control arms, support elements of motorcycles and bicycles, can be obtained for the first time by the improvement, which are fully filled, good in surface quality, fine and even in grain size, reasonable in streamline distribution and without disordered streamline, vortexing and draining phenomena. The invention combines a plurality of technological processes into a production cycle, which reduces the turnover links, saves energy and reduces cost.

The invention discloses an optical fiber time frequency transmission system and method by utilizing Manchester encoding. The system comprises a transmitting end, and the transmitting end comprises a time frequency source, an N frequency multiplier, a first TDC, a first encoder, a first laser, a first circulator, a first photoelectric detector and a first decoder. According to the invention, an optical fiber time frequency transmission technology with high precision and high stability is combined with a Manchester encoding mode which contains self-timing information, is easy to extract frequency signals from data, is easy to encode/decode and has high anti-interference capability; high-precision and high-reliability synchronous transmission of time, frequency and data can be realized on theoptical fiber.

The invention provides a frequency-division oscillator-based switching power supply for realizing the frequency modulation and relates to a switching power supply circuit. The switching power supply comprises an operating circuit with an energy storage element and switched between the charging mode and the discharging mode under the effect of a pulse modulation signal, a control circuit used for generating the pulse modulation signal according to a reference voltage, a voltage feedback signal, a current detection signal and a clock signal, a clock signal generator, and a selection unit. The control circuit comprises an error amplifier used for obtaining an error amplifying signal. The clock signal generator comprises a clock frequency-division unit used for generating a plurality of clock signals different in frequency under the effect of a reference clock source. The selection unit is used for selecting one clock signal out of the plurality of clock signals under the effect of the error amplifying signal and then outputting the selected clock signal to the control circuit. According to the invention, a plurality of clock signals of preset frequencies are generated by a frequency-division oscillator. After that, one clock signal of a preset frequency is selected within a preset period of time according to the error amplifying signal and then is outputted to the control circuit. In this way, the period is stable and the ripple waves of the output voltage are reduced.

Disclosed are a negative active material for a rechargeable lithium battery including a core including a material being capable of intercalating and deintercalating lithium ions and a shell positioned on the surface of the core, wherein the shell includes antimony-doped tin oxide, a method of manufacturing the same, and a rechargeable lithium battery including the same.

The invention discloses a pulse frequency modulation circuit based on a voltage controlled oscillator, and relates to a switch power supply circuit. The pulse frequency modulation circuit comprises a work circuit which is switched between a charge mode and a discharge mode under the effect of pulse modulation signals; a control circuit which generates the pulse modulation signals according to first reference voltages, voltage feedback signals and frequency variable clock signals and comprises an error amplifier providing error amplification signals; a clock signal generator which comprises an annular oscillation unit generating clock signals with fixed frequencies under the effect of power supply voltages; and an adjustment unit which is connected between the power supply voltages and the annular oscillation unit for adjusting work currents of the circuit under the effect of the error amplification signals so as to adjust the clock signals. According to the invention, the size of the work currents of the clock signal generator is adjusted through the error amplification signals, the oscillation frequency is changed, the frequency of the clock signals is finally adjusted, needed pulse modulation signals are obtained, the cycle is stable, and ripples of output voltages are reduced.

The invention discloses a metal wire grating polarizer with a deep ultraviolet composite structure. The metal wire grating polarizer comprises a substrate, a metal grating with a groove and a medium filling structure, wherein the metal grating and the medium filling structure have the same period P of 100-300nm, the duty ratio W/P of the metal grating is 0.5-0.85, and the height-width ratio H/W ofthe metal grating is 1-3. By reducing the generation of metal and dielectric interface surface plasmas, the inhibition effect of the metal and dielectric interface surface plasmas on TM polarized light is reduced, and the TM polarization transmittance and extinction ratio are increased. The metal wire grating polarizer has the characteristics of large period, simple manufacturing process, high polarization transmittance, high extinction ratio and the like in the deep ultraviolet band. The device is compact in structure and easy to integrate, the polarization detection system serving as a polarization analyzer does not need a collimating optical system, the detection system can be effectively simplified, the polarization detection system is miniaturized and wide in application range, and the device has important application value in the polarization detection system of the deep ultraviolet lithography machine.

The invention can be used in the field of seawater power generation. The present invention relates to a semi-active ground effect wing water current energy generation method and device, which solves the technical problems of existing devices such as dead spots, low transmission efficiency, difficult coupling of multiple hydrofoil movements, and no consideration of ground effect. There are generators, hydrofoils, and a flat slide rail mechanism, a hydrofoil pitching motion control mechanism, a hydrofoil heave motion control mechanism and a gear shaft; hydrofoils, a hydrofoil pitching motion control mechanism, and a hydrofoil heave motion control mechanism Both are two sets; the flat slide rail mechanism is equipped with an optical axis and a connecting plate, and the connecting plate is set on the optical axis; the hydrofoil pitching motion control mechanism is equipped with a stepping motor and a control device; A plate, a rack and a gear, the gear meshes with the rack, and the rack is arranged on the connecting plate; the power generation device is provided with a rack, a gear, a pinion shaft and a generator. The invention has high transmission efficiency and can effectively utilize the ground effect to realize high-efficiency energy harvesting.

The invention relates to the technical field of welding equipment, and particularly discloses ultrasonic welding equipment which comprises a rack. A rotating disc (11) is horizontally arranged in therack, the center of the rotating disc (11) is arranged on an output shaft of a divider (15) in a sleeving manner, and the input end of the divider (15) is connected with a rotating shaft of a motor (16). An ultrasonic welding station, a body feeding station, a ligand feeding station and a discharging station are sequentially arranged on the periphery of the rotary disc (11) in the rotating direction of the rotary disc (11), and a protruding block (12) used for fixing a body is fixed to the position, corresponding to a station working point, of the rotary disc (11). According to the ultrasonicwelding equipment, the whole process of the equipment is controlled by setting the degree through a PLC control system, plastic products and ligands do not need to be placed manually, equipment welding does not need to be started manually, the period is stable, efficiency is high, and errors are not likely to happen.