99results about How to "Small volume requirement" patented technology

The invention relates to a technology and a device system for producing dimethyl oxalate by high-pressure carbonylation of industrial synthesis gases and producing ethylene glycol through dimethyl oxalate hydrogenation. The technology comprises the following steps: adopting industrial NO, O2 and methanol as raw materials for an esterification reaction to produce methyl nitrite; adopting industrial CO and methyl nitrite for a carbonylation reaction in a plate reactor to produce carbonylation products, which mainly include dimethyl oxalate and dimethyl carbonate; separating the carbonylation products to obtain dimethyl carbonate products; subsequently adding hydrogen into dimethyl oxalate in the plate reactor to produce ethylene glycol products; conducting the coupling recovery treatment on waste acids in the esterification reaction and purge gases in the carbonylation reaction for recycling. The device system comprises an esterification reaction system, a carbonylation reaction system, a coupling recovery system for purge gases and waste acids and a hydrogenation reaction system. The technology has the characteristic that device consumption is remarkably reduced, and particularly the nitric acid waste liquid recycling and purge gas recycling technologies as well as the separation technologies thereof are highly coupled; recycling of the raw materials in reaction waste gases is realized, and the effect is remarkable.

The invention provides a motor drive and power return two-way power source of an electric automobile, and the two-way power source comprises an energy conversion direct current part and a positive motor drive and reverse motor electric energy recovery part, wherein the energy conversion direct current part comprises a two-way DC (direct current) / DC converter, a two-way DC / DC convertor digital control system, a positive inversing and reverse rectifier circuit, a motor drive digital control system, a two-way DC / DC circuit driving and protecting circuit, an inverter circuit driving and protecting circuit, a battery voltage detecting circuit, a battery current detecting circuit, a bus voltage detecting circuit and a motor current detecting circuit. A battery is connected with the two-way DC / DC convertor, so that the bus voltage of a motor driving circuit is adjusted to be a stable value, and the driving circuit drives a permanent magnet synchronous motor to run so as to drive the automobile; and the motor is in an electricity generation status when the automobile is braked, the motor driving circuit transmits the energy to a bus, and a microcontroller detects a brake signal and drives the two-way DC / DC convertor to feed the energy back to the battery. Furthermore, the characteristic and efficiency of the electromagnetic compatibility (EMC) of the power source can be improved.

The invention discloses a tray, a tray assembly, a battery pack assembly and a vehicle. The tray comprises a bottom plate and a frame, wherein the bottom plate comprises a plurality of sub bottom plates, runners are arranged in at least one part of sub bottom plates in the plurality of sub bottom plates, a battery module is suitably arranged on the sub bottom plates provided with the runners, and the frame is arranged at a peripheral edge of the bottom plate. By the tray, the volume requirement of a cavity for accommodating the battery module can be reduced, the runner arrangement is simpler, a water-cooling mode and an air-cooling mode can be simultaneously compatible, particularly in the water-cooling mode, a cooling liquid can directly flows outwards even the cooling liquid is leaked, short circuit of the battery module is prevented, the battery module is safer to use, and a relatively good protection effect can be played on the battery module.

The present invention is process of machining spherical HF vector sensor with integrated vibration velocity channel and sound pressure channel. The process includes: setting one 3D vibration velocity sensor in the center of one sphere made of low density composite material, embedding eight sound pressure hydrophones homogeneously on the surface of the sphere, mounting one ring with four suspension loops outside the sphere in certain distance, and coating the sphere with sound penetrating material while exposing four suspension loops. The spherical HF vector sensor is applied in great depth hydroacoustic measurement.

The invention provides a side flow test paper strip for serum marker luminescence detection based on near infrared excitation and emission and preparation and use methods thereof, and relates to a side flow test paper strip and preparation and use methods thereof. The technical problems of heat damage of the existing detection material on biomolecules and high background signals can be solved. Theside flow test paper trip consists of a polyvinyl chloride support back plate, a detection pad, a combination pad, a sample pad and an absorption pad, wherein the combination pad is loaded with an upper conversion beta-NaYF4:Yb,Tm@NaXF4 nanometer crystal probe combined with antibodies and an upper conversion beta-NaYF4:Yb,Tm@NaXF4 nanometer crystal probe combined with mouse IgG. The preparation method comprises the following steps of 1, preparing a core; 2, coating a shell; 3, assembling a luminous probe; 4, assembling the side flow test paper strip. In the use process, the laser is used forirradiating the detection line to detect the emission spectrum; the detection range is 0.05 to 50ng / mL; the detection limit is 0.02ng / mL; the side flow test paper strip can be used in medical care detection.

The invention provides a silicon carbide MOSFET device and a manufacturing method thereof. The invention improves device structure design and finally integrates Schottky contact or heterojunction contact with rectifying characteristics on the basis of traditional silicon carbide UMOSFET structure. At that same time of optimize the basic characteristics of the traditional silicon carbide UMOSFET structure, the improvement realize the integration of multi-sub rectifier devices, greatly optimizes the work performance of the third quadrant of the device, and in addition, the invention also optimizes the dynamic performance of the device, and has shorter switching time; In addition, the invention also has the characteristics of simple process and easy realization.

The invention provides a silicon carbide MOSFET device and a manufacturing method thereof. Discontinuous gate structures are formed on the basis of the common silicon carbide MOSFET structure, two silicon carbide deep P injection regions are introduced between the two gate structure and metal or polycrystalline silicon is introduced between the two silicon carbide deep P injection regions. The metal or the polycrystalline silicon directly contacts the silicon carbide N-epitaxy so as to form the Schottky contact or the heterojunction contact having the rectification characteristic. The improvement greatly optimizes the conventional silicon carbide UMOSFET basic characteristics, realizes integration of multiple sub-rectifiers and greatly optimizes the third quadrant performance of the device. Meanwhile, the silicon carbide MOSFET device has the characteristics of low Miller capacitance, simple process and easy implementation.

The invention belongs to the technical field of computers, relating to fault diagnosis system and method of an encoder based on logic compatibility and aiming to provide an automatic fault diagnosis device of an encoder and a diagnosis solving method thereof. The fault diagnosis system comprises a user interface unit, a model description unit, a language analysis unit, a conflict recognition unit, a diagnosis solving unit, a fault positioning unit and a digital communication unit. The system is specially characterized in that the structure, function and component behavior of the encoder is prescriptively described by using a model description language according to an encoder constitution principle, accordingly, the expected behavior of the encoder under normal circumstances is deduced, differences exist between the expected behavior and an actual observation when a fault occurs, and then a component set triggering the fault is confirmed by using logical deduction. In the invention, from the conflict recognition to the generation of candidate diagnosis, the whole operation process is simple and needs short time, and the discrimination and positioning of the system on a fault point does not depend on the experience of an operator or an expert, thereby the limitations of the traditional diagnosis method are overcome.

The invention discloses a pressure-storing and energy-saving washing tank and a pressure-reducing water drain valve. A pressure-reducing valve element is sleeved in a pressure-reducing cover to form the pressure-reducing water drain valve 2 and mounted on a water outlet 1B of a water tank. A valve rod 2C is connected with the pressure-reducing valve element 2A or is provided with a labor-saving lever mechanism 5. A permanent magnet or flowing pressure or electromechanical valve starting device is connected with the pressure-reducing valve element through the valve rod for indirect starting. A flow-storing flexible bag 7 and an air inlet and outlet hole or an air regulating valve can be arranged at the inner end of the water tank. A slow-draining and water-storage-supplement chamber 9 can be arranged at the outer end of the water outlet. The pressure-reducing valve needs few starting power and can directly start or indirectly start by the aid of a low-energy-consumption power device. The problems that existing pressure-storing washing tanks and straightway water drain valves are large in stress, difficult in starting, large in water drain pressure drop, high in cost and the like are solved. The pressure-reducing water drain valve has the advantages of low starting power, large water drain pressure, large flow, small pressure drop, capability of supplementing water storage, cleanness and water saving in washing, low cost, maintainability, low usage cost and the like.

The invention discloses a segmented grinding method for a large rotor of a screw compressor. The method comprises the specific steps that 1, an arc grinding wheel is trimmed; 2, the rotor type linear value point is selected according to the initial segmented line spacing; 3, an envelope path of the arc grinding wheel to machine the rotor is computed; and 4, a spiral groove is machined in a segmented mode. The large screw rotor is ground in a segmented mode through the arc grinding wheel; under the condition of lowering the requirements for machining equipment, the spiral face of the large rotor is segmented, the relative position of the grinding wheel and a workpiece is adjusted, and by conducting precision machining on the large screw rotor in a segmented grinding mode, abrasion to a tool is lowered on the premise of ensuring the machining precision. The requirements for equipment size and loads are low; the grinding tool can conduct profiling conveniently and is small in profiling quantity; the machining precision is high; the production cost is low.

The invention discloses a pretreatment method for carbon-nitrogen stable carbon isotope assay of a liquid sample, belongs to the technical field of sample pretreatment, and aims at solving the problem in a conventional detection method that the errors of the detection result is large or even the result cannot be obtained as the required sampling concentration cannot be reached. The pretreatment method comprises the following steps: I, preparing zeolite powder, II, preparing a liquid sample to be detected; and III, detecting. By adopting the pretreatment method, the requirement on the concentration of carbon-nitrogen is reduced by 10 times when compared with that of a standard automatic liquid sampler feeding method, and the requirement on the size of a sample to be detected is also reduced by 50 times; secondly, zeolite as an additive is a porous silica-alumina mixed oxide which is very low in price and very good in water absorption effect, most importantly the carbon-nitrogen carbon stable isotope assay result is not affected by zeolite, and the steps are simple and easy to operate.

The invention discloses an FP pressure sensor based on a low-temperature coupling effect of a photonic crystal fiber. The FP pressure sensor comprises the photonic crystal fiber, a quartz capillary tube and a polymer film, the welding surface of the photonic crystal fiber and the quartz capillary tube and the inner surface of the polymer film form two parallel reflecting surfaces of an FP interferometer. When light in the photonic crystal fiber encounters the two reflecting surfaces, reflected light is generated, the two beams of reflected light interfere in the photonic crystal fiber to generate an interference spectrum, when the cavity length of the FP interferometer changes along with the measured pressure, the changing optical path difference between the two beams of reflected light causes the movement of the interference spectrum, and by detecting the movement amount of the interference spectrum, the change of the measured pressure is obtained. The FP pressure sensor is suitable for measuring the conditions that the environment temperature change is large, the temperature change needs to be compensated, and the measured water pressure is small, meanwhile, the requirement for high precision is met, the manufacturing process is simple, and the size is small.

The invention provides a selectable error amplifier and voltage comparator multiplex circuit. The multiplex circuit comprises a bias voltage generation circuit, an input stage load circuit, an error amplifier output circuit and a voltage comparator output circuit, wherein the bias voltage generation circuit provides a bias voltage for the input stage load circuit, the output end of the input stage load circuit is connected with the error amplifier output circuit and the voltage comparator output circuit, and the error amplifier output circuit or the voltage comparator output circuit is gated through a control signal. According to the multiplex circuit, selection of circuit functions is achieved through the control signal, the input stage load circuit and the error amplifier output circuit form an error amplifier structure, and when the control signal is at a low level, the input stage load circuit and the voltage comparator output circuit form a comparator structure. When applied to a multi-model modulation type DC-DC converter circuit, the multiplex circuit removes the conflict between the chip area and the conversion efficiency of the converter circuit.

The invention provides a method for conducting line-by-line milling on a rotor tooth profile surface of a large screw compressor along a spiral line and relates to screw compressors. The method comprises the steps that firstly, a disk-type arc milling cutter is selected, and the arc radius r of the disk-type arc milling cutter is determined; secondly, rotor profile line value points are selected according to the initial line-by-line step lengths of the spiral line; thirdly, the envelope path of the disk-type arc milling cutter for machining the rotor profile is calculated according to the spiral surface forming principle, and an initial position point of the envelope path is determined; fourthly, a spiral groove is machined line by line along the spiral line; fifthly, other spiral grooves are machined in sequence until all the spiral grooves are formed. Only the existing common disk-type arc milling cutter and a numerically-controlled screw rotor milling machine are needed; the relative machining positions of the milling cutter and the screw rotor are deduced by establishing a segmented milling mathematic model; the disk-type arc milling cutter can be mounted on the numerically-controlled screw rotor milling machine to conduct line-by-line milling on the large screw rotor through the existing numerical control technology. The method has the advantages that precision is high, cost is low, and the existing small machine tool can be used for conducting numerical control milling on the large screw rotor.

The invention provides a silicon carbide MOSFET device and a manufacturing method thereof. The invention aims at a conventional silicon carbide UMOSFET structure, and proposes a multi-sub rectifier device integration mode, and includes implementation methods of Schottky contact and Si / SiC heterojunction contact. While effectively improving the basic characteristics of the traditional carbonize UMOSFET and optimizing the long-term application reliability of the device, the invention realizes the integration of the multi-sub rectifier devices, thereby greatly optimizing the work performance of the device in the third quadrant. The implementation process of the structure is compatible with the traditional silicon carbide UMOSFET process, and has the characteristic of easy fabrication.

The invention discloses a preparation method of a jet polishing micro-texture coating cutter, and relates to the field of cutter coatings. The preparation method comprises the following steps of micro-abrasive jet polishing the surface of the coating cutter; after jet polishing is completed, cleaning the coating cutter; and using laser to process micro-texture on the surface of the coating cutter.The invention further discloses a cutting method of the coating cutter matched with minimal quantity lubrication. The cutting method comprises the following steps of fixing a to-be-processed workpiece on a machine tool clamp, and fixing the coating cutter on a cutter handle or a cutter bar; setting the water quantity, the oil amount, and the pressure intensity and flow of compressed air of minimal quantity lubrication equipment; aligning a nozzle with a cutting part of the cutter, setting the distance between the nozzle and the cutting part of the cutter, opening the minimal quantity lubrication equipment, and spraying lubricant stably from the outlet; and setting the cutting speed, the feeding speed, the cutting depth and the cutting width, starting a machine tool to carry out cutting machining. According to the method, on the premise that the cutting edge of the cutter and the quality of the coating are improved, the friction coefficient of chips and a front cutter surface and the friction coefficient of a machined surface and a rear cutter surface are further reduced in the cutting process.

An RF signal phase shifting network comprises the components of a first phase shifter, a second phase shifter, a third phase shifter, a compensating phase-shifting circuit and a microstrip phase-shifting circuit; wherein the first phase shifter, the second phase shifter and the third phase shifter can perform phase shifting on an input signal; the first phase shifter, the second phase shifter and the third phase shifter respectively comprise a first port, a second port, a third port and a fourth port. According to the RF signal phase shifting network, the compensating phase-shifting circuit is used for compensating a phase difference which is caused by the microstrip phase-shifting circuit to multiple-frequency-point signal phase shifting; an error of the whole RF signal phase shifting network to multiple-frequency-point signal phase shifting can be reduced; and phase flatness is reduced, thereby satisfying requirements for multiple navigation systems and broadband applications in a circular polarized antenna.

The present invention provides a transverse groove-type MOSFET device, belonging to the technical field of semiconductor power devices. A polycrystalline silicon region or a Schottky contact metal region is formed at the circumference side of the gate structure to allow polycrystalline silicon region or the Schottky contact metal region and the drift region to form heterojunction or Schottky contact with rectification characteristics. Because the heterojunction or Schottky contact is multiple sub devices and is lower in conduction pressure drop compared to a traditional parasitic diode, the reverse recovery characteristic of the device can be optimized, and an excellent three-quadrant on-state performance is achieved; and compared to an external antiparallel diode mode, the size of the electrical power system can be significantly reduced, the package cost is reduced, interconnection lines are reduced, and the parasitic effect of the interconnection lines is reduced so as to improve thereliability of the system. Aiming at the problem that the device gate medium electric field is too high, the optimization is design to improve the long application reliability performance of the device. Besides, the preparation method of the device is simple and controllable and easy to achieve, and promotes the popularization of the semiconductor power device in the many actual applications.

The invention discloses a manufacturing method for a machine vision filter. The manufacturing method comprises the following steps: A, cutting, i.e., cutting a glass substrate according to the required size of equipment, wherein the adopted glass substrate is a colorless glass substrate; B, cleaning, i.e., placing the cut glass substrate in pure water to soak and performing oscillation cleaning by using ultrasonic wave; C, drying, i.e., drying the cleaned glass substrate by using an air drying method; D, plating a main film, i.e., plating the main film by using an ion beam assisted electron beam evaporation coating technology; E, plating a secondary film, i.e., plating the secondary film on the other face of the glass substrate by using the same process in the step D after plating the main film; and F, post-processing, i.e., grinding the edge of the plated glass substrate by using an inner circle cutting machine. According to the manufacturing method, the cost for manufacturing the machine vision filter is greatly reduced by using a series of scientific manufacturing processes, and the signal-noise ratio of the machine vision filter has reached the level of 1,000:1.

The invention provides a totally-digitalized high-efficient multi-frequency quick charging power supply, which comprises a high power factor high-efficient rectification module and a two-direction direct-current (DC) / DC conversion module, wherein the high power factor high-efficient rectification module comprises a filter circuit, an active power factor correction circuit, a network voltage detection circuit, an input current detection circuit, a power factor correction (PFC) digital control system, a power factor correction driving circuit and the like; and the two-direction DC / DC conversion module comprises a two-direction DC / DC converter, an output filter circuit, a two-direction DC / DC converter digital control system, a two-direction DC / DC converter driving circuit and the like. The active power factor correction circuit adopts a three-phase three-level three-switch topological form, and by adopting a digital control way, the power factor can be improved, and the current harmonic interference can be reduced; and the two-direction DC / DC converter adopts a four-phase structural bridge-type structure, every two phases are connected to an output through a coupling inductance, and moreover, since two identical phases are supplementary to each other, two different phases are shifted and a multi-frequency control way is adopted, the current ripple at the output side can be reduced, and the electromagnetic compatibility (EMC) characteristics and the efficiency of the overall machine can be improved.

A spool valve, for a motor vehicle's automatic transmission, having a housing and an axially movable valve spool in a guide recess of the housing, including at least one radial inlet connection and one radial outlet connection spaced axially apart therefrom, and a working connection on the front face, at least one first control opening connected to the inlet connection and one second control opening spaced axially apart therefrom and connected to the outlet, and one third control opening situated axially between these two and connected to the working connection being present on the guide recess, the control openings being hydraulically cooperate-able with one first and second control section on the valve spool, and a connection channel extending axially in sections being in the housing, connecting the third control opening to the working connection.The housing includes a section made of plastic, in which the connection channel is formed.SUBSTITUTE SPECIFICATION 12

The invention discloses a design of a driving structure of an exoskeleton assistance recovery device. The driving structure comprises a direct-current motor, a pair of bevel gears, a straight gear, an inner rack, a transmission shaft and a fixing plate. The bevel gears are used for changing the power transmission direction; the straight gear and one bevel gear form a coaxial transmission device; the straight gear is meshed with the inner rack; and one end of the inner rack is fixed to an outer-side upper-end component of a joint. Compared with the pair art, the motor of the exoskeleton assistance recovery device is vertically arranged, and therefore the requirement for the size of the motor in the past is reduced. In addition, the exoskeleton assistance recovery device is simple in mechanical structure, high in control accuracy, large in transmission torque and high in safety.

The invention discloses a control system for a direct current brush motor and a three-state control method thereof. The control system comprises an upper computer controller, a single-pole relay, a double-pole relay and a direct current motor; the upper computer is connected with coil windings of the single-pole relay and the double-pole relay and controls on-off of the coil windings of the single-pole relay and the double-pole relay; the double-pole relay has two movable contacts which respectively are a movable contact COM1 and a movable contact COM2, also has two normally-closed static contacts which respectively are a normally-closed static contact NC1 and a normally-closed static contact NC2, and further has two normally-open static contacts which respectively are a normally-open static contact NO1 and a normally-open static contact NO2; the single-pole relay has a movable contact COM, a normally-closed static contact NC and a normally-open static contact NO; the movable contact COM1 is connected with an A end of the direct current motor; the movable contact COM2 is connected with a B end of the direct current motor; after being connected, the normally-closed static contact NC1 and the normally-open static contact NO2 are connected with the normally-open static contact NO; after being connected, the normally-closed static contact NC2 and the normally-open static contact NO1 are connected with a power supply cathode; the normally-closed static contact NC is idle; and the movable contact COM is connected with a power supply anode.

The invention discloses a lateral flow test strip for serum marker luminescence detection based on near-infrared excitation and emission as well as a preparation method and an application method of the lateral flow test strip, which belongs to the field of immunological detection and aims to solve the technical problems that an existing nano material for biological detection has optical damage toorganisms and has high detection background signal interference. The lateral flow test strip consists of a polyvinyl chloride supporting back plate, a detection pad, a combination pad, a sample pad and an absorption pad, wherein the combination pad is a down-conversion [alpha]-NaLnF4:Nd,Yb@CaF2 / NaLnF4 nanocrystalline probe loaded with a combination antibody, and a down-conversion [alpha]-NaLnF4:Nd,Yb@CaF2 / NaLnF4 nanocrystalline probe combined with mouse IgG. The lateral flow test strip provided by the invention has a wide detection linear range and strong applicability, has low requirements onthe volume of a to-be-detected sample, short in required detection time, capable of realizing bedside detection and high in flexibility; and the lateral flow test strip does not need professional personnel to operate and can be used for medical detection.

The invention discloses a method for separating and recovering chloroperoxidase (Chloroperoxidase, EC 1.11.1.10, CPO), which utilizes co-precipitation and redissolution method, that is, hydrophilic polymer polyethylene glycol is precipitated and entrained at high salt concentration CPO molecules, so as to enrich the CPO protein concentration, and then use the two-phase extraction technology to efficiently separate and recover high-purity CPO, that is, to separate different proteins by using the different distribution coefficients of the separation target product and impurities in the hydrophilic polymer phase solution. The present invention proposes reasonable and feasible two-phase CPO extraction and purification conditions through research, summarizes the separation technology of micro-content bioactive substances, solves or improves the extraction interference, low recovery rate, high product price, and purification cycle existing in the current CPO production process. Long, can not scale production and other issues.

The invention provides a computer system, a wireless terminal and an information processing method. Communication with a host can be completed in a wireless mode, input instructions can be wirelessly sent to the host for processing, wireless display signals and wireless audio signals of the host can be received, electronic devices of a central processing unit, a graphic processing unit, a memory, a hard disk and the like can be omitted in the wireless terminal, and the cost and the weight of the wireless terminal are reduced. The wireless terminal can present good performance by utilizing high-performance central processing unit, graphic processing unit, memory, hard disk and the like of the host. Besides, the host has no high requirement for volume, so that the host does not need to be highly integrated, can achieve modular assembly like a common desktop computer and facilitates realizing upgrade.

The invention provides a heart valve which comprises a valve support, a flow choking piece and a valve leaflet. The valve support comprises a valve leaflet support and a skirt support. The flow choking piece covers the valve leaflet support. The valve leaflet is arranged in the valve leaflet support. The skirt support extends outwards from the valve leaflet support in the radial direction of the valve leaflet support. The heart valve further comprises a balloon surrounding the outer wall of the valve leaflet support. The heart valve can reduce central reflux to a large extent.

The invention discloses a material processing system. The material processing system comprises material conveying equipment and material grabbing equipment, wherein the material conveying equipment comprises a support component, a conveying belt, a power component, a magnetic component and an adjusting structure, the conveying belt is used for conveying materials, the power component is used for driving the conveying belt to rotate so as to convey the materials, the magnetic component is arranged below the conveying belt and is used for sucking the materials located on the conveying belt, andthe adjusting structure is matched with the power component so as to adjust the tightness of the conveying belt. According to the material processing system, the material conveying equipment and the material grabbing equipment are arranged, so that the materials can be quickly grabbed and then are conveyed, the material processing efficiency can be effectively improved in the process, and manpoweris saved; the materials cannot deflect, remain, slip or fall off in the process, so that quick conveying is realized, and the material processing efficiency is improved.