1102 results about "Double stage" patented technology

The invention discloses an intelligent coordination control method of a dynamic bi-directional green wave band for an urban traffic trunk road. The method comprises the steps of starting, processing coordination parameters, processing intersection parameters, processing time and processing cycle, etc. The method adopts a double-stage control structure, namely, a control layer of a traffic control center server and a control layer of an intersection intelligent signal controlling machine, through the information interaction and the coordination of the traffic control center server and the intersection intelligent signal controlling machine, phase sequence is optimized in an on-line manner; and common period, highway section upper phase difference, highway section down phase difference, the starting time of an upper coordination phase, the starting time of a down coordination phase, green ratio at each intersection and other key control parameters are optimized and calculated on a real-time basis. The intelligent coordination control method gets rid of the limit of equal intersection intervals required for the coordination control of the green wave band for the urban traffic trunk road, and realizes the unceasing travel of bi-directional traffic flows on the main road by applying the traffic engineering technique, the artificial intelligence technique and the automatic control technique, thereby reducing the parking rate while the traffic capacity of the trunk road is improved, and obviously reducing the traveling time.

The invention discloses a temperature control dehumidification system and a temperature control dehumidification method for the fresh air of a radiation air conditioner. The system comprises an air duct system, a radiation water circulation system and a cooling system, wherein the air duct system comprises a fresh return air treatment air duct and an exhaust air heat recovery air duct, which are independent; a pre-cooler/pre-heater and a temperature control heat exchanger are integrated corrugated finned type internally-threaded coiled pipes, and are connected with a radiation water inlet/outlet pipeline to form the radiation water circulation system; one stage of evaporator is used for direct evaporation, and two stages of condensers are connected in parallel to form a double-stage condensation cooling compression system. The system can be combined with the radiation air conditioner to independently control temperature and humidity, and besides a conditioning treatment function of a conventional dehumidification system, the system also has an exhaust air heat recovery function; a household compression cooling air conditioner is combined with the dehumidification system to realize cooling in summer, heating in winter and humidification in transition seasons; the running energy consumption is greatly lowered, and the shortcomings of dehumidification incapability and high condensation rate of the radiation air conditioner are overcome.

The invention discloses a fault location method based on a residual and a double-stage Elman neural network for a hydraulic servo system, comprising the following steps of: obtaining the input/output signals of the hydraulic servo system in a normal working state, an electronic amplifier fault state and a leakage fault state, training a fault observer by virtue of the input/output signal in the normal state, and obtaining a real-time residual signal by the fault observer at first, and then training a state follower in real time and on line to obtain a network connection weight corresponding to the real-time signal, and training an RBF (radial basis function) fault locator by using the time-domain characteristic value of the residual signal and the network connection weight as the training input samples of the RBF fault locator. Both of the fault observer and the state follower are realized by the improved Elman network. Whether the system has a fault or not at present can be judged by comparing the time-domain characteristic value with a fault threshold, and the type of the fault can be obtained by the fault locator. The fault location method disclosed by the invention realizes fault location for the hydraulic servo system, and has high location accuracy and engineering applicability.

The present invention relates to a double-stage lift extra-high voltage charged sweeping robot, belonging to the field of robot technology. Said sweeping robot includes the following components: sweeping hand jaw, sweeping arm, hand jaw turning joint, insulating platform, upper-stage fork frame, lower-stage fork frame, upper-stage lifting cylinder, lower-stage lifting cylinder, fork frame traveling platform, lifting mechanism, turning platform, hydraulic automatic leveling system, overhead table, central control system, wireless communication and remote control operation terminal, etc. Said invention provides their connection mode and the working principle of said sweeping robot.

The invention is suitable for the field of radio frequency communication, and provides a double-stage inversing D-class power amplifying circuit and a radio frequency power amplifier. The circuit comprises an input passive component connected with a block condenser, a positive and negative double-way driving-stage F-class amplifier, a positive and negative double-way amplifying-stage inversing F-class amplifier and an output passive component, wherein the two input ends of the positive and negative double-way driving-stage F-class amplifier are connected with the two output ends of the input passive component through two block coupling condensers, the two input ends of the positive and negative double-way amplifying-stage inversing F-class amplifier are connected with the two output ends of the positive and negative double-way driving-stage F-class amplifier through two condensers, and the two input ends of the output passive component are connected with the two output ends of the positive and negative double-way amplifying-stage inversing F-class amplifier through the two condensers. By utilizing an F-class driving inversing F-class push-pull structure, according to the harmonic shaping technology, the efficiency, the power and the gain of the power amplifier are improved, the independent control from a fundamental wave to a triple frequency harmonic impedance is achieved, the design difficulty is lowered, and the tedious debugging work in the later period is lowered. In addition, due to the positive and negative double-way structural design, the power and the gain are further improved.

The invention relates to a silicon wafer stage double-stage exchange system by adopting an air-floatation planar motor, mainly applied to a photoetching machine system. The silicon wafer stage double-stage exchange system comprises a drill base as well as a silicon wafer stage and a silicon wafer stage driving device having the same structure and respectively working on a preprocessing station and an exposure station. The silicon wafer stage driving device consists of a planar motor and an air-floatation structure, wherein the planar motor adopts a permanent magnetic planar motor, a stepping planar motor, an induction-type planar motor or a switch reluctance planar motor, and consists of a stator and two rotors, wherein the stator is arranged on the top of the drill base, and the rotors are arranged at the bottom of the silicon wafer stage; and the air-floatation structure is formed by a plurality of air-floatation bearings arranged at the bottom of the silicon wafer stage. The system realizes double-stage exchange and stepping scanning motion on the plane by directly driving the silicon wafer stage with the planar motor, thereby improving the productivity, alignment precision and resolution of the photoetching machine.

The invention discloses a three-stage circulation aerobic reactor, which comprises a pond body, wherein the inside of the pond body is partitioned into a conical sewage expansion area, an aerobic reaction area, an anaerobic reaction area and a sediment filtering layer from bottom to top in sequence; the upper part of the aerobic reaction area is provided with a primary gas-solid-liquid separation area; the upper part of the anaerobic reaction area is provided with a secondary gas-solid-liquid separation area; three-phase separators are respectively arranged in the primary gas-solid-liquid separation area and the secondary gas-solid-liquid separation area; a water outlet weir is arranged above the sediment filtering layer; a water outlet pipe is arranged on the water outlet weir; the top of the pond body is provided with a double-stage circular reflowing system; the double-stage circular reflowing system comprises an air-lift pipe, a gas-liquid separating tank and a lower layer reflowing pipe; an upper layer reflowing pipe is arranged between the secondary gas-liquid separation area and the sediment filtering layer; and the upper layer reflowing pipe is connected with an aeration air inlet pipe arranged above the pond body. The reactor is provided with a three-stage circular reflowing system, and has the characteristics of rapid start of flocculent sludge, high impact load resistance, low requirement on the PH value of inflow water, high particle sludge increasing speed, low energy consumption, high treating efficiency and stable water yielding quality.

The invention relates to a high-damage tolerance type ultrahigh strength aluminum alloy and a preparation method thereof. The high-damage tolerance type ultrahigh strength aluminum alloy comprises the following components in percentage by weight: 8.5-10.0 percent of Zn, 1.0-2.5 percent of Mg, 1.0-2.0 percent of Cu, 0.06-0.20 percent of Zr, 0.02-0.05 percent of Ti, not more than 0.08 percent of Fe, not more than 0.06 percent of Si and the balance of Al and unavoidable impurities, wherein the Fe content is larger than Si content. The method comprises the following steps: firstly, smelting and casting; then carrying out homogenization on an alloy casting blank by stages, carrying out hot rolling on the homogenized casting blank and carrying out solid dissolution on a hot rolled plate; prestretching the plate in four hours after quenching; and finally immediately carrying out double-stage ageing processing on the prestretched plate. The obtained alloy has higher strength and damage tolerance and is suitable for being applied in an airplane part exposed in the atmospheric environment for a long time.

The invention relates to a gas-steam circulation combined double-stage coupling heat pump heat supply device and belongs to the technical field of heat supply equipment. The gas-steam circulation combined double-stage coupling heat pump heat supply device can supply a low-temperature cooling working medium for gas-steam circulation, recycle condensation heat of steam, gradiently utilize energy for supplying heat and extracting steam and recycle heat of cooling water. A gas compressor is communicated with a boiler; the boiler is communicated with a gas turbine; the gas turbine is communicated with the boiler through a feed water heater; the feed water heater is communicated with an evaporator; the boiler is communicated with a power generation turbine; the power generation turbine is communicated with a small turbine and a steam condenser respectively; the steam condenser is communicated with the feed water heater; the feed water heater is communicated with the boiler; the steam condenser is communicated with the evaporator; the power generation turbine is communicated with the small turbine; the small turbine coaxially drives a compressor to rotate; the small turbine is communicated with a generator; the small turbine is communicated with a steam pipeline; a condenser is communicated with an absorber; and the absorber is communicated with the condenser. The gas-steam circulation combined double-stage coupling heat pump heat supply device is mainly applied to afterheat utilization of a gas-steam circulation power plant in the field of heat pump heat supply.

A mechanism for coupling a coaxial waveguide to another waveguide. The mechanism includes a lower or matching waveguide and an impedance transformer. A coaxial port couples the coaxial waveguide to the matching waveguide. The matching waveguide has a waveguide impedance which is close to the impedance of the coaxial waveguide. This arrangement allows matching between the coaxial waveguide and the matching waveguide over a wider frequency band. The impedance transformer couples the matching waveguide to the other waveguide. The impedance transformer comprises a single-stage, double-stage, or multi-stage transformer. The mechanism is suitable for coupling an antenna to a coaxial cable interface in a radar or microwave based level measurement or time of flight ranging systems.

The invention discloses a rare earth Er microalloyed Al-Zn-Mg-Cu alloy and a preparation method thereof, which belong to the technical field of metal alloy. In the invention, 0.02 to 0.1 weight percent of rare earth Er is added into an Al-Zn-Mg-Cu alloy. The method comprises: firstly, coasting an alloy ingot, and annealing by a double-stage homogenizing annealing process; secondly, performing forging deformation or extrusion deformation and solution treatment at 465 to 475 DEG C; and finally, performing peak aging treatment or double-stage overaging treatment. In the invention, the rare earthEr is added into the Al-Zn-Mg-Cu alloy in a proper amount and mode to produce effective microalloying effect with the alloy, so that the alloy has high strength and high plasticity and fracture toughness.

The invention provides a double stage exchange system adopting transition devices for wafer stages in a photoetching machine, which belongs to the technical field of semiconductor manufacturing equipment. The invention comprises a wafer stage running in the pretreatment position, a wafer stage running in the exposure position, and H-shaped driver units arranged in the pretreatment position and the exposure position respectively. The H-shaped driver units each consists of an X-axis linear motor and a Y-axis linear motor and are used for driving the wafer stages to move in the X-axis and Y-axis directions in the pretreatment position and the exposure position respectively. The technical proposal of the invention is that two transition devices are arranged between the stages and provided thereon with friction wheels. When the H-shaped driver units are aligned with the transition devices, the wafer stages are transferred from the pretreatment position to the exposure position under the frictional force of the friction wheels. The invention ensures the accurate connection of guide rails and reduces the complexity of the system structure.

The invention provides an air conditioning system. The air conditioning system comprises a compressor, a four-way reversing valve, an outdoor heat exchanger, a flash evaporator and an indoor heat exchanger, wherein the compressor, the four-way reversing valve, the outdoor heat exchanger, the flash evaporator and the indoor heat exchanger are sequentially communicated. The first port of the flash evaporator is communicated with the first port of the outdoor heat exchanger, the second port of the flash evaporator is communicated with the gas supplement port of the compressor, and a gas supplement valve is arranged between the second port of the flash evaporator and the gas supplement port of the compressor. The third port of the flash evaporator is communicated with the first port of the indoor heat exchanger. The compressor is provided with a first gas suction port and a second gas suction port. The first gas suction port and the second gas suction port are communicated with the four-way reversing valve, and a gas suction valve is arranged between the first gas suction port and the four-way reversing valve. According to the air conditioning system, the double-cylinder capacity-variable technology and the double-stage compression, gas supplement and enthalpy increase technology are adopted, switching of the single-cylinder work mode and the double-cylinder work mode is achieved through opening and closing of the gas suction valve, and control over the gas supplement amount is achieved through opening and closing of the gas supplement valve. In the process of low-frequency and small-load single-cylinder operation, the energy efficiency is improved. In the process of high-frequency and large-load double-cylinder operation, the ability is improved.

The invention relates to a polypropylene composite material and a preparation method thereof. The material is prepared from the raw materials of, by weight, 100 parts of polypropylene, 40-200 parts of a nano-grade heat conductive filling material, 10-50 parts of a grafted polyolefin elastomer compatibilizer, 0.5-5 parts of a coupling agent, 0.5-3 parts of an antioxidant, and 1-5 parts of a lubricant. According to the invention, the heat-conductive filling material is modified by using the coupling agent; the modified heat-conductive filling material is uniformly mixed with the compatibilizer, the antioxidant, and the lubricant according to the ratio; extrusion granulation is carried out, such that a cladding structure is formed; the cladding structure is subjected to mixing with polypropylene in a double-screw extruder, such that the polypropylene composite material is obtained. According to the invention, the nano-grade heat-conductive filling material and the grafted polyolefin elastomer are used for filling and modifying polypropylene resin. With a double-stage extrusion method, the heat-conductive filling material has good dispersion property and interface bonding property, such that heat conductivity and impact property of polypropylene are improved. Especially, low-temperature impact property of polypropylene is also substantially improved. The material and the method can be applied in the fields of floor heating, solar energy, chemical transportation, and the like.

A continuous method for producing composite elastic yarns at speeds up to 700 m/min by (a) stretching (drafting) an elastomeric yarn (e.g., spandex) by 2.0×(100%) to 10.5×(950%) while heating (max. heating temperature 220° C.) in a single or double stage draft, (b) air-jet entangling with a relatively inelastic yarn component to create a composite elastic yarn, and then (c) in-line heat-treating (max. heating temperature 240° C.) the composite elastic yarn. The initial draft stage(s) may also be carried out at ambient temperature. The resulting composite elastic yarn has improved stitch clarity, particularly suited for hosiery, and its properties can be tailored to provide fabric properties for knit and woven fabrics hitherto not possible with standard spandex yarns.

The invention discloses an image target detection method based on a feature pyramid network. A top-down module TDM, a bottom-up module BUM and a fusion expansion module FEM are added to a backbone network model adopted before the backbone network model is sent to a target detector; therefore, a novel enhanced feature pyramid network eFPN is formed. The detection performance of small-size objects,large-size objects and medium-size objects can be enhanced at the same time, only few parameters and calculation amount are introduced, the problem of multi-scale targets in the target detection process is better solved, the performance of a single-stage network and a double-stage network is obviously enhanced, and therefore the detection performance of the multi-scale target objects in the imageis improved.

The invention discloses an oil-return secondary braking hydraulic station with high reliability; a plurality of electromagnetic reversing valves are arranged on the pipeline that communicates an A-group braking gate and the heat accumulator and the hydraulic reversing valve; a permanent-opening adjustable throttling valve is arranged at the inlet pipe and the outlet pipe of the A-group braking gate, and a permanent-opening throttling valve is arranged at the inlet and the outlet of the B-group braking gate; the pipeline of the B-group braking gate is provided with two electromagnetic reversing valves that are communicated with an oil tank; the electromagnetic valves are provided with an on-line monitoring reversing position sensor. Through the multiple insurance braking valve, the braking gate can be reliably communicated with the heat accumulator; when the oil cannot be returned for the electromagnetic valves and the electric-liquid voltage-regulation device have malfunctions, the pressure oil is ensured to be returned to the oil tank through the permanent-opening throttling valves, thereby realizing the high-reliable oil-return brake of the secondary braking in the well while guaranteeing the normal braking. The hydraulic station has compact structure, is easy to be operated, is convenient to be repaired, has simple method, is safe and reliable, and has good braking effect, and has wide practicability.

The invention discloses an air-supplementing and enthalpy-increasing control method, facility and device for a double-stage compressor. The air-supplementing and enthalpy-increasing control method comprises the steps that when an air-supplementing electronic expansion valve needs to be opened, the opening of the air-supplementing electronic expansion valve is gradually increased under the control of a control in time sequence; after the air-supplementing electronic expansion valve is opened, the detected air-supplementing superheat degree of the double-stage compressor is obtained; the opening of the air-supplementing electronic expansion valve is adjusted based on the air-supplementing superheat degree of the double-stage compressor, wherein the air-supplementing electronic expansion valve is arranged between a medium-pressure liquid storage tank and the double-stage compressor; and when the opening of the air-supplementing electronic expansion valve is not zero, a gaseous refrigerant in the medium-pressure liquid storage tank supplements air and increases enthalpy for the double-stage compressor. By adopting the air-supplementing and enthalpy-increasing control method, facility and device for the double-stage compressor, the problem of a double-stage compressor in the prior art that the operation stability is poor is solved.

The invention relates to a heat treatment method for improving the obdurability of a 7-series high strength aluminium alloy, comprising the following steps: firstly carrying out double-stage forced solution treatment on the hot-processing 7***-series high strength aluminium alloy, namely, performing primary solution treatment for 2-4 hours at the temperature of 420-450 DEG C, and performing secondary reinforced solution treatment for 2-4 hours at the temperature of 450-490 DEG C; then quenching and cooling to room temperature, wherein the quenching medium is room temperature water; prestretching within 1-4 hours after quenching, wherein the prestretching distortion is 1-3%; performing high-temperature short-time ageing treatment, wherein the aging temperature is 120-180 DEG C and the aging time is 60-180min; quenching and cooling to room temperature after high-temperature short-time aging treatment, wherein the quenching medium is room temperature water; and finally carrying out low-temperature long-time aging treatment, wherein the aging temperature is 60-120 DEG C, and the aging time is 18-48 hours. The heat treatment method for improving the obdurability of a 7-series high strength aluminium alloy of the invention further improves the fracture toughness property of alloys and broadens the applied range of the aluminium alloys on the basis of maintaining the superhigh alloy strength.

The invention provides a double-stage enthalpy-increased rotor compressor. The double-stage enthalpy-increased rotor compressor comprises a shell, a first air cylinder, a second air cylinder, a pump body partition plate, a lower flange and a lower flange cover plate. A first sliding piece groove is formed in the first air cylinder to contain a first sliding piece, a second sliding piece groove is formed in the second air cylinder to contain a second sliding piece, an enthalpy-increased refrigerant flow hole is formed in the second air cylinder, and a partition plate flow hole is communicated with the enthalpy-increased refrigerant flow hole and an air suction opening of the first air cylinder. The rotor compressor is characterized in that the side, close to the second air cylinder, of the pump body partition plate is provided with a partition plate ventilation groove, and the partition plate ventilation groove is communicated with the partition plate flow hole. The varying-capacity control technology is applied to the double-stage enthalpy-increased compressor, and the energy-saving effect is effectively improved.

The invention discloses a 0.1-5GHz ultra-wideband CMOS (complementary metal oxide semiconductor) power amplifier which comprises an input matching circuit, an ultra-wideband driving-stage amplifying circuit, an ultra-wideband power amplifying circuit and an output direct-current blocking circuit. A first ultra-wideband driving stage is used for acquiring preceding-stage gain and guaranteeing ultra-wideband input matching of the integral circuits; an ultra-wideband driving power stage is used for guaranteeing high power output of the integral circuits and an excellent ultra-wide output matching characteristic of the integral circuits. The 0.1-5GHz ultra-wideband CMOS power amplifier has the advantages that a double-stage stacking structure is combined with a compensation capacitive circuit, so that a chip is small in area and wide in bandwidth; parameters of the amplifier can be determined after various indexes such as the gain, bandwidths and output power of the integral circuits are integrated in the integral circuits, so that requirements on high gain, linearity and driving power and flatness at the bandwidth of 0.1-1.5GHz can be met.