35results about How to "Cycle stable" patented technology

The invention discloses a rotary decelerating and braking energy recovery system of a hydraulic excavator, comprising two valve blocks. Each valve block is provided with a hydraulic control unloading valve, a hydraulic control conversion valve, a hydraulic control reversing valve and two one-way valves; in each valve block, the hydraulic control reversing valve is respectively communicated with a multi-way valve, the hydraulic control conversion valve, the hydraulic control unloading valve, the second one-way valve, a pilot oil path control handle and a rotary motor; the second one-way valve is communicated with a energy accumulator; the hydraulic control conversion valve and the hydraulic control unloading valve are communicated with the energy accumulator via the first one-way valve; the multi-way valve is respectively communicated with the hydraulic control conversion valve and the hydraulic control unloading valve via the first one-way valve; the hydraulic pump and the controller are connected with the second pressure sensor; and the energy accumulator and the controller are connected with the first pressure sensor. The invention enables the hydraulic excavator to automatically judge the motion state of the rotary system and recover the braking energy and enables the engine to work in the high-efficiency interval.

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 provides a low jitter frequency dividing clock circuit. The low jitter frequency dividing clock circuit includes a clock control signal generating circuit for generating clock signals with different phases, a low-level narrow pulse width clock control signal generating circuit for generating low-level narrow pulse width clock control signals, a high-level narrow pulse width clock control signal generating circuit for generating high-level narrow pulse width clock control signals, and a frequency division clock synthesis circuit for generating frequency division clock signals according to the low level narrow pulse width clock control signals and the high level narrow pulse width clock control signals. In the low jitter frequency dividing clock circuit, a delay of at most three logic gates is passed from a clock input terminal to a clock output terminal, so that the low jitter frequency dividing clock circuit has the advantages of less passed logic gates, smaller delay, and lower jitter, compared with a traditional D-trigger-based divide-by-2 frequency dividing clock circuit which passes delay of 6 or more logic gates. Beside, the low jitter frequency dividing clock circuit has the characteristics of stable cycle and low jitter, and can reduce rising edge time and falling edge time, thus being conductive to the low jitter characteristic, guaranteeing that the output phase difference of a trigger is fixed, and having a stronger driving capability.

A device is provided with a vertical synchronizing signal separating circuit separating the vertical synchronizing signal of an input luminance signal and outputs it as a first vertical synchronizing signal, an automatic frequency control circuit generating and outputting a second vertical synchronizing signal having a repetition frequency equivalent to the average repetition frequency of the first vertical synchronizing signal, a vertical synchronizing signal phase detection circuit detecting whether the first vertical synchronizing signal alternately repeats the two periods and outputting the detection result as a discrimination signal and a selector receiving the first and the second vertical synchronizing signals and selecting and outputting the first vertical synchronizing signal when the discrimination signals shows that the first vertical synchronizing signal alternately repeats the two periods and the second vertical synchronizing signal in the other cases.

The invention discloses a ground effect hydrofoil tidal current energy power generation device, belongs to the field of tidal current energy power generation and ocean engineering equipment, and solves the technical problem of low generated power and multi-hydrofoil motion coupling of an oscillating hydrofoil power generation device in the prior art. The ground effect is utilized to improve the hydrodynamic performance of double-hydrofoil swinging, so that the power generation efficiency of the tidal current energy power generation device is improved. The power generation device comprises a four-bar mechanism, a crank connecting rod and a rack and pinion mechanism, and the four-bar mechanism is driven to run through up-and-down heaving motion of hydrofoils so as to drive a generator to generate power; and meanwhile, the four-bar mechanism can drive the crank connecting rod and the rack and pinion mechanism to move, and then a transmission wheel drives the hydrofoils to do periodic pitching motion, so that self-coupling of heaving motion and the pitching motion of the hydrofoils is guaranteed. According to the ground effect hydrofoil tidal current energy power generation device, self-coupling of heaving motion and pitching motion of the hydrofoils is realized, and continuous energy output of the device is ensured; and by utilizing the ground effect between the hydrofoils, the power generation efficiency of the oscillating hydrofoil tidal current energy power generation device is improved, and the power generation cost is reduced.

A ground-effect wing tidal current energy generating device belongs to the field of tidal current energy generating and marine engineering equipment. The invention solves the technical problems of low power generation and multi-hydrofoil motion coupling of the oscillating hydrofoil generating device in the prior art. The ground effect is used to increase the hydrodynamic performance of the swinging wings, thereby improving the power generation efficiency of the tidal current power generation device. The power generation device includes a four-bar mechanism, a crank connecting rod and a rack and pinion mechanism. The up and down movement of the hydrofoil drives the four-bar mechanism to operate, thereby driving the generator to generate electricity; at the same time, the four-bar mechanism can drive the crank connecting rod and the rack and pinion. The structure moves, and then drives the hydrofoil to do periodic pitching motion through the transmission wheel, which ensures the self-coupling of the hydrofoil heave motion and the pitching motion. The invention realizes the self-coupling of the heave and pitch motions of the hydrofoils, ensures the continuous energy output of the device; utilizes the ground effect between the hydrofoils, improves the power generation efficiency of the oscillating hydrofoil type tidal current energy generating device, and reduces the power generation cost.

The invention discloses a rotary decelerating and braking energy recovery system of a hydraulic excavator, comprising two valve blocks. Each valve block is provided with a hydraulic control unloading valve, a hydraulic control conversion valve, a hydraulic control reversing valve and two one-way valves; in each valve block, the hydraulic control reversing valve is respectively communicated with amulti-way valve, the hydraulic control conversion valve, the hydraulic control unloading valve, the second one-way valve, a pilot oil path control handle and a rotary motor; the second one-way valve is communicated with a energy accumulator; the hydraulic control conversion valve and the hydraulic control unloading valve are communicated with the energy accumulator via the first one-way valve; the multi-way valve is respectively communicated with the hydraulic control conversion valve and the hydraulic control unloading valve via the first one-way valve; the hydraulic pump and the controller are connected with the second pressure sensor; and the energy accumulator and the controller are connected with the first pressure sensor. The invention enables the hydraulic excavator to automatically judge the motion state of the rotary system and recover the braking energy and enables the engine to work in the high-efficiency interval.

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.

Devices that convert heat into electricity, and methods for a fabrication of the same are provided. The asymmetric thermo-electrochemical capacitor uses a GO-based positive electrode and a battery-type negative electrode to open up the operating voltage window and enhance the electrical discharge capacity for converting low-grade heat into electricity with excellent efficiency, fast thermo-charging time, and stable cycles. The thermo-electrochemical device includes a carbon-based positive electrode, a conductive polymer or a metal-organic framework as negative electrode, a current collector, and a porous separator.

The invention discloses a breeding method of a new variety derived from hybrid acer truncatum, which includes the following steps: Binfen Qiuse seeds are planted; after saplings grow up, several saplings with red leaves in autumn are found, and saplings with red leaves in autumn form a group, and the two saplings in the group are grafted by a cutting grafting method; in the second year, the best grafted seedlings with red leaves in autumn are selected from the grafted seedlings, and each two grafted seedings are grafted again as a group; in the third year, the best secondary grafted seedlingswith red leaves in autumn are selected from secondary grafted seedlings, and the second grafted seedlings are grafted again; and the best seedlings with red leaves in autumn are selected and observedfor many years. The survival rate of grafting survival rate is about 70% by the method, the new plant variety obtained is named Fuhong, the new variety continues the excellent resistance of acer truncatum and acer platanoides, especially the insect resistance and salt-alkali resistance characteristics are superior to that of the acer truncatum, the most important thing is that the effect of leavesof the new variety turning red is better, the red turning cycle is stable, the leaves can steadily turn red in October every year, and the ornamental value is higher.

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 provides a method for removing solid impurities from catalytic oil slurry. According to the method, an agent and oil mixing unit, a centrifugal deasphalting unit, a light oil slurry filtering unit, a light oil slurry desolventizing unit and a heavy oil slurry desolventiziing unit are arranged. Catalytic oil slurry and a solvent are completely mixed, and asphaltene in the oil slurry is removed through centrifugal separation according to different solubility, on each component of the oil slurry, of the solvent, so that the influence on oil slurry filtration by the asphaltene is reduced, the oil slurry filtration reliability is improved and long-cycle stable operation of an oil slurry filtering system is guaranteed. The solvent is recovered and recycled through the light and heavy oil slurry desolventizing units, so that consumption of the solvent is reduced.

The invention discloses an underwater multi-channel signal acquisition and transmission array system-based simulation device which is characterized in that the simulation device comprises a processorand a storage, wherein the storage is used for storing computer programs, the execution of the processor to the computer program can realize the following steps: configuring an underwater transmissionarray; generating a simulated acoustical signal of the configured transmission array; generating a simulated non-acoustical signal of the configured transmission array; generating a simulated self-detection signal of the configured transmission array; and responding to a command received by the configured transmission array. The simulation device is small in volume, the signal generated during simulation is high in precision and stable in period, and a user can freely configure all parameters, such as node configuration of the array, the frequency, amplitude, phase positions, gain of the simulation generation signal, and the like, therefore, thus providing great convenience for debugging the upper-layer application of the underwater transmission array.

The invention discloses environment-friendly sewage treatment equipment which comprises an outer frame, the outer frame is of a square box structure, two side walls of the outer frame are each provided with a side groove, the top of the outer frame is fixedly communicated with a water inlet pipe, the end, located in the outer frame, of the water inlet pipe is fixedly connected with a water spraying opening, and a control valve is arranged on the water inlet pipe; and cylindrical grooves are formed in the two side walls of each side groove, telescopic pipes are arranged in the cylindrical grooves, sliding pins are fixedly connected to the tops of the telescopic pipes, and the multiple sliding pins are jointly connected with a sieve plate in a sliding mode. The equipment has the advantages that a rolling brush device can reciprocate on a sieve plate without arranging a power source such as a motor, only a control power source of a plurality of valves needs to be provided, and compared with the prior art, the manufacturing cost is lower, and the using process is more energy-saving and environment-friendly.

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 discloses a combined tool, device and method for forming array structure fins. Combined tools include cutting tools and limiting tools. The cylindrical workpiece is processed by using the coulter and limiting block of the limiting tool and the cutting edge and rake face of the cutting tool; the coulter plows out multiple parallel continuous lines on the chips. Grooves, the material between the grooves accumulates to form fins on top of the chips, the cutting edge cuts out continuous chips, and the continuous fins are "accumulated-destroyed" in the compression area between the limiting block and the rake face The principle is to form a periodic wavy shape, and a three-dimensional structure of fins can be produced by combining tools. The device includes the above-mentioned combination tool and vibrator. The combination tool is driven to reciprocate and vibrate along the feed direction through the vibrator, so that the unstable self-excited vibration becomes stable forced vibration, shortens the period of the "accumulation-destruction" state of chips, and makes the wing The sheet molding cycle is relatively stable, and the fins are needle-shaped, with high heat transfer performance.

The present invention provides a low-jitter frequency-division clock circuit, comprising: a clock control signal generation circuit for generating clock signals with different phases; a low-level narrow pulse width clock control signal generation circuit for generating low-level narrow pulse width clock control signal; a high-level narrow pulse width clock control signal generation circuit, used to generate a high level narrow pulse width clock control signal; High-level narrow-pulse-width clocking signal to generate a frequency-divided clock signal; the clock input to the output in the present invention is delayed by at most three logic gates, compared to the traditional ÷2 frequency-divided clock based on D flip-flops The circuit passes through the delay of 6 or more logic gates, and the present invention has fewer logic gates, smaller delay, lower jitter, stable cycle and low jitter characteristics, reduced rising edge and falling edge time, and is beneficial to low jitter characteristics , to ensure that the flip-flop output phase difference is fixed, and has a strong driving capability.

A pulse frequency modulation circuit based on a reference voltage comparison oscillator relates to a switch power supply circuit. The circuit comprises a work circuit, a control circuit, a clock signal generator, a first comparator and an adjusting unit. The work circuit is switched between a charge mode and a discharge mode under the effect of pulse modulation signals. The control circuit generates pulse modulation signals according to a first reference voltage, voltage feedback signals and frequency variable clock signals. The control circuit includes an error amplifier for providing error amplification signals. The first comparator compares voltages on the two ends of a second energy storage element with a second reference voltage, and generates transformed high and low levels which serve as clock signals. The adjusting unit receives control of the error amplification signals, and selects one of voltage reference signals different in voltage as a second reference voltage. The output of the error amplification signals directly controls the frequency of the clock signals, so periods are steadily and ripples of output voltages are minimized.

A switching power supply for realizing frequency modulation based on a frequency division oscillator relates to a switching power supply circuit. It includes: a working circuit provided with an energy storage element, which switches between charge and discharge modes under the action of a pulse modulation signal; a control circuit, which is used for a reference voltage, a voltage feedback signal, a current detection signal and a clock signal Generate a pulse modulation signal; the control circuit includes an error amplifier for obtaining an error amplification signal; the clock signal generator includes a clock frequency division unit that generates a plurality of clock signals with different frequencies under the action of a reference clock source; The selection unit selects one of the multiple clock signals to output to the control circuit under the action of the error amplifier signal. The present invention generates a plurality of clock signals with a set frequency through a frequency division oscillator, and selects a clock signal with a set frequency to output to the control circuit within a set time through an error amplification signal, so that the cycle is stable and the ripple of the output voltage is reduced. Wave.

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.

The invention provides a software sequence code generating method based on the genetics-similar characteristics of extensible precision chaos. The basic structure of a track of extensible precision chaos comprises a root gene position, a common gene position and an individual gene position. The method comprises the steps of firstly determining the length of output software sequence codes and the number of the batch sequence codes, determining the root gene position and the common gene position, converting the same into decimals serving as the (i) x ( / i) 0 initial values of a Logistic equation, and determining the values of a control parameter; secondly, performing calculation by using the low position iteration method and performing iteration continuously until a specified precision is reached, and outputting a sequence obtained through the low position iteration method when the specified precision is reached; thirdly, writing a corresponding output sequence into a software data file as a software sequence code, and repeating the second step until the requirement for the specified number of the batch sequence codes is met. The method is based on the characteristics of stable periods and random diversity of the individual gene position and is suitable for protecting legal use of computer software.

The invention discloses a hydraulic oscillator for directional drilling operation. The oscillator is composed of a power sub and a vibration sub, wherein the power sub comprises a power shell, a bearing, a rotating shaft, a blade, a connecting frame, a rotating cylinder and a piston, and the vibration sub comprises a sliding sleeve, a sliding shaft, a connecting sleeve and a disc spring. The oscillator has the advantages that the rotating cylinder structure is adopted to directly push the vibration sub to perform periodic reciprocating vibration, compared with a traditional driving mode utilizing hydraulic pressure changes, the oscillation frequency is slowed down, the oscillation amplitude and period are stabler, the influence of high-frequency vibration on an underground high-precision instrument is effectively avoided, the overall working stability of a drilling tool is guaranteed, in addition, a drilling fluid does not scour damageable parts of the hydraulic oscillator during use of the hydraulic oscillator, the damageable parts comprise a rolling wheel, the disc spring and the like, and the service life of the oscillator is effectively prolonged.

The invention belongs to the technical field of particle filter for diesel vehicles, and discloses a method, device, equipment and storage medium for monitoring the collecting efficiency of a particle filter. The method includes: acquiring the carbon accumulation output value of the particulate filter system within a preset monitoring period; comparing the carbon accumulation output value with a calibration threshold; when the carbon accumulation output value is less than the calibration threshold, obtaining The monitoring results of the low collection efficiency of the particle filter. Through the above method, the use of PM sensors with poor measurement accuracy and unstable signal feedback is avoided, and the collection efficiency of the particle filter can be monitored in real time according to the carbon accumulation output value in the preset monitoring period, and the period is stable, which solves the existing problem In the technology, the method of monitoring the performance of the particle filter system is unstable and the results have errors in the monitoring process.

The invention discloses a blower-vacuum suction tube manipulator jig, which comprises a supporting seat, sucking discs, a first cylinder, a second cylinder and a third cylinder. Four sucking discs are arranged above the supporting seat. One end of the supporting seat is connected with the first cylinder. The other end of the supporting seat is connected with the second cylinder. The third cylinder is connected below the supporting seat. By adopting the technical scheme, the blower-vacuum suction tube manipulator jig has the advantages that the products can be stabilized by using the jig, the required moving position can be controlled by controlling the up-and-down moving distance of the cylinders to realize parallel takeout of the products, the product cycle is guaranteed to be stable, the qualification rate is high and the period of manual takeout is reduced.

The invention discloses a schizophyllum commune strain, a cultivation site and white ginseng. The schizophyllum commune strain is named as Schizophyllum commune Fr.ML-1, and the preservation number of the schizophyllum commune strain is CCTCC (China Center for Type Culture Collection) NO: M 2021296. The cultivation site is used for culturing or cultivating the schizophyllum communeh strain and comprises one or more of a flat shed, an arched shed, a factory building and a simple house, and the cultivation conditions are as follows: a mode with natural scattered light, natural ventilation and natural air temperature and without spray irrigation facility, humidification and temperature control system, standardized shelf or refined technical management is adopted; the white ginseng is obtained by cultivating the schizophyllum communeh strain in the cultivation site, the average biotransformation rate is 14% or above, and the cultivation period is 20-30 days. The schizophyllum communeh strain can be used for culturing mycelia and cultivating sporocarps at the natural temperature of 5-33 DEG C, and the schizophyllum communeh strain also has the characteristics of easiness in management, relatively stable cultivation period, stable yield, high average biotransformation rate and the like.