61results about How to "Has a modular feature" patented technology

The invention provides a premixing pre-vaporization combustion chamber for a main combustible stage of a discrete pipe. The combustion chamber is in a single annulus structure, and consists of a combustion chamber outer case, a combustion chamber inner case, a flame tube outer wall, a flame tube inner wall and a combustion chamber head, wherein combusting air completely enters a flame tube from the combustion chamber head, a staged combustion scheme, namely a pre-combustible stage and the main combustible stage, is adopted; a swirl cup is adopted in the pre-combustible stage which is of a diffusion combustion organization mode; a premixing pre-vaporization device is adopted in the main combustible stage, a main combustible stage nozzle supplies fuel axially, the fuel is vaporized in the premixing pre-vaporization device and blended with air, the uniformly mixed combustible gas enters the combustion chamber to participate in combustion, namely a premixing combustion organization mode. The pre-combustible stage controls the range of stable work of the combustion chamber, and provides a stable ignition source for the main combustible stage; and the main combustible stage controls main pollution emission of the combustion chamber, and lower pollution emission of the combustion chamber is realized by controlling the equivalence ratio of premixed gas of the main combustible stage. The premixing pre-vaporization device has a simple structure, and can realize that the pollution emission of an aircraft engine combustion chamber can be reduced on the basis of not influencing the combustion stability.

The invention relates to a pre-mixing and pre-evaporation low-pollution combustion chamber with a double-oil-way four-rotational-flow pre-film type main combustion stage. The combustion chamber is of a single-ring-cavity structure, and adopts a central staged combustion mode, wherein the head of the combustion chamber is divided into a preliminary combustion stage and a main combustion stage, the preliminary combustion stage adopts a mode of combining diffusive combustion with rotational-flow pre-mixing combustion, and is capable of reducing pollutant discharge under low-flow working conditions while ensuring combustion stability; the main combustion stage adopts a mode of pre-mixing and pre-evaporation combustion, and is capable of effectively reducing combustion pollutants. The oil way of the main combustion stage is divided into two stages, fuel oil in each stage forms an oil film on a pre-film plate, and the oil films are atomized, evaporated and blended under the action of two rotational flows to form a uniform oil-gas mixture, thus facilitating reduction for the combustion pollutants; due to the double-oil-way design, the one-stage working of the main combustion stage under low-flow and medium-flow working conditions such as entrance, and the two-stage working of the main combustion stage under high-flow working conditions such as take-off can be met, thus facilitating the oil-gas matching of the combustion chamber under different working conditions, and further reducing the pollutant discharge level of the whole landing and take-off circulation of the combustion chamber of an aeroengine.

The invention provides a bionic multi-foot walking robot and a robot leg and belongs to the field of leg robots. In order to solve the problem that the existing leg robot is complicated in structure and control, the robot utilizes the characteristic of control of a plurality of pairs of legs on the same side driven by a single motor, so that the robot is simple in structure and control and walks stably. The robot comprises a walking device and a robot main body arranged above the walking device, wherein the walking device is divided into walking unit sets arranged oppositely left and right; each walking unit set comprises a plurality of groups of pairwise robot legs arranged side by side; and a shock-absorbing device is mounted above the walking device and the main body of the robot. The robot is applied to detection, reconnaissance and operation in a hazardous operation environment and is applicable to material transportation and the like in various complicated terrains.

An LNG and aviation kerosene dual fuel combustor of an aero-gas turbine comprises a combustion area which comprises a precombustion area and a main combustion area, the outer boundary of the combustion area is provided with an inner flame tube wall, the inner boundary of the combustion area is provided with an outer flame tube wall, the front of the combustion area is provided with a combustor head, and the combustor head is connected with the inner flame tube wall through a head end wall. The LNG and aviation kerosene dual fuel combustor of the aero-gas turbine has the advantages that a center staged combustion concept is adopted, two kinds of fuel can be applied simultaneously, a precombustion level which adopts gas fuel provides a stable ignition source and reduces pollutant emissions, low pollution combustion is achieved through a main combustion level, pollutant emission is reduced, and the stability of the aero-gas turbine combustor can be guaranteed simultaneously; a double-ring cavity combustor structure is adopted, air used for combustion is all fed from the head, a flame tube is only provided with a dilution hole and a necessary cooling hole, the modularization feature is achieved, the combustion structure is simplified, and a premixed pre-evaporation loop structure is simpler and easy to process.

The invention discloses a high-power semiconductor laser array wavelength locking and line width compression device and a method. The device comprises a semiconductor laser array, a beam shaping system, a partial reflection mirror and a dispersion optical element. The laser emitted by each bar of the semiconductor laser array is collimated by the corresponding beam shaping system and then output in parallel. The parallel laser beams are respectively incident to the corresponding partial reflectors. One part of light in each laser beam is reflected by the corresponding partial reflector, then is sequentially reflected by other subsequent partial reflectors of the reflection light path and finally enters the dispersion optical element; diffracted light returns along an original path and enters each bar of the semiconductor laser array again after being reflected by each partial reflector, and each bar, the light beam shaping system corresponding to each bar, part of reflectors and the dispersion optical element form an external cavity structure together. According to the method, strict consistency of emergent wavelengths of different light emitting sources can be ensured, and accurate wavelength locking and ultra-narrow linewidth spectrum output are easy to realize.

The invention discloses a vehicle-mounted autonomous charging platform for an unmanned aerial vehicle, belonging to the technical field of unmanned aerial vehicles. The vehicle-mounted autonomous charging platform comprises a roof hangar, a take-off and landing boss and a quad-rotor unmanned aerial vehicle which are mounted in the roof hangar, and a charging interface device matched with the unmanned aerial vehicle and the take-off and landing boss, wherein an electromagnet array is arranged at the bottom of the take-off and landing boss and used for tightly adsorbing landing legs of the unmanned aerial vehicle; and the unmanned aerial vehicle comprises a controller, the controller is divided into a position controller and an attitude controller, and position stabilization and attitude stabilization of the unmanned aerial vehicle are respectively controlled by calculating resultant external force and resultant external torque generated by the unmanned aerial vehicle. The autonomous charging platform is further provided with a circuit system; when the unmanned aerial vehicle is charged, the controller measures voltage every 0.1 s, on-off information of a charging circuit is indirectly obtained, and if the charging circuit is disconnected, the controller controls the unmanned aerial vehicle to adjust posture again until the charging circuit is closed again to continue charging. According to the invention, a requirement on the pose accuracy of the unmanned aerial vehicle is reduced, and the robustness and success rate of autonomous landing are improved.

The invention relates to a convolutional neural recognition system and method based on ARM and FPGA, and the system comprises: a convolutional neural network parameter training module which is used for obtaining the model parameters of a convolutional neural network; an ARM chip which is used for receiving and forwarding the model parameters and transmitting an identification result to display equipment; and an FPGA convolutional neural network hardware module which is used for achieving all convolutional neural networks with the model parameters from an input layer, a convolutional layer, a pooling layer, an activation layer to a full connection layer in a hardware circuit mode, performing forward prediction operation on the image flow input in real time, achieving image identification classification and outputting an identification result. Compared with the prior art, the system has the advantages of low cost, low power consumption, high operation speed and the like.

The invention discloses a low-pollution combustion chamber adopting forced diversion at the primary combustion stage outlet, which adopts a single ring cavity structure and comprises a diffuser, a combustion chamber outer casing, a combustion chamber inner casing, a flame tube outer wall, a flame tube inner wall and a combustion chamber head, wherein the combustion chamber adopts a staged combustion scheme, and is divided into a precombustion stage and a primary combustion stage; and the precombustion stage adopts a cyclone-stable diffusion combustion/cyclone premixed combustion combination mode. By adopting the central staged structure, the precombustion stage structure is simple. The primary combustion stage adopts the axial cyclone matched with the prefilming plate structure to enhance the fuel premixing and preevaporation, so that the pollution discharge of the whole landing-takeoff circulation of the aircraft engine combustion chamber is further lowered. Particularly, the primary combustion stage outlet is provided with an air forced diversion ring, so that the primary combustion stage air forms a divergent flow, and a full central backflow region is formed in the combustion chamber, thereby improving the ignition performance of the central backflow region.

The invention relates to a nano-amplified self-reference probe for in-situ imaging of microRNA (miRNA) in living cells and a preparation method thereof. The probe is formed by encapsulating a nucleicacid hairpin modified upper conversion nanoparticle (UNP-H1) and a fluorescent molecule modified hairpin molecule (H2-F) through a liposome. When the probe enters a cell, UNP-H1 and H2-F are released,and only when H1 is hybridized to the miRNA, H2 can replace the miRNA to hybridize with UNP-H1, and the released miRNA starts the next cycle to amplify a signal. Under excitation of near-infrared light, luminescence resonance energy transfer (LRET) occurs between the emission band 1 (EEB1) and F of the UNP. The luminescence intensity ratio of the LRET and EEB2 channels (ILRET/IEEB2) can be used for relative quantification of intracellular miRNA taking emission band 2 (EEB2) channel of the UNP as a self-reference.

The invention relates to a system and method for inkjet manufacturing of a variable Chipless RFID. The system comprises an inkjet printing head, a function ink material, a sintering device, a mark chasing device, an encoder, a control circuit board, an industrial control machine and a data server. According to the method, the Chipless RFID data scheme stored in the data server is transmitted to the industrial control machine, the industrial control machine converts server data into printing signals so as to be transmitted to the control circuit board, the control circuit board determines the position of a printing base material and the transmission speed according to signals fed back by the mark chasing device and the encoder, a spraying head is controlled to print the function material ink on the base material to form a Chipless RFID line type, the resonance characteristic of the Chipless RFID can be achieved through the sintering device, and due to data online transmission and inkjet printing, Chipless RFIDs are different. According to the system and method, the aim that inkjet printing manufacturing has the unique Chipless RFID is achieved, the Chipless RFID can serve as an independent system and also can serve as an embedding structure of a printing or packaging and other machines.

The invention relates to a power-assisted umbrella head for a tent, which comprises an upper umbrella head and a lower umbrella head. The lower umbrella head can move axially relative to the upper umbrella head; It is hinged with the connecting piece, and the other end is hinged with the lower umbrella head to form a triangular support structure; it also includes an independent booster assembly; the booster assembly includes a sleeve, an elastic piece and a clip; the elastic piece is pre-tensioned by the clip Encapsulated in a sleeve; the sleeve is detachably fixedly connected to the upper umbrella head and slidably sleeved in the lower umbrella head; the lower umbrella head is driven by the clamp to compress the elastic member axially; the umbrella head adopts an independent spring The sleeve independently carries the powerful booster component, which has the characteristics of modularization, can be assembled independently, integrated assembly, modular disassembly and replacement, which simplifies the installation and replacement procedures, reduces the difficulty, ensures the installation accuracy, and can be used as a common core component; The booster umbrella head provides booster for the tent during the tent stretching process.

The invention discloses a modular oil film damping test device. A cylindrical upper test piece is sleeved in a sleeve from top to bottom. The upper test piece and the contact surface of the sleeve keep clearance fit. Oil is injected into the gap to form an oil film. The sleeve is supported and fixed on a base through peripheral steps. A dynamic force sensor is fixedly arranged at the axis of the upper end face of the upper test piece. The dynamic force sensor goes upward and is fixedly connected with an excitation rod. A first accelerometer is arranged on the upper end face of the upper test piece. A non-contact micro-displacement sensor and a second accelerometer are arranged on the upper end face of the sleeve. The invention further discloses a modular oil film damping test method. The device provided by the invention has the advantages of simple structure and convenient method implementation, and is of great significance for the scientific research of an oil film damping mechanism and the promotion and application of an oil film damper.

The invention discloses a cable-driven series-parallel palletizing robot with the characteristics of light weight and high bearing capacity. The cable-driven series-parallel palletizing robot comprises a base, an upper connecting rod, a lower connecting rod, a connecting plate, a shoulder joint cable-driven branch chain, an elbow joint cable-driven branch chain, a wrist joint cable-driven branch chain and a mechanical grabbing device. A rotary driving assembly is mounted on the base and drives the base to rotate horizontally; the upper end of the upper connecting rod is connected with the base in a swinging manner through a shoulder joint; the upper end of the lower connecting rod is swingably connected with the lower end of the upper connecting rod through an elbow joint; the connecting plate is swingably connected with the lower end of the lower connecting rod through the wrist joint; the shoulder joint cable driving branch chain drives the upper connecting rod to swing around the shoulder joint; the elbow joint cable driving branch chain drives the lower connecting rod to swing around the elbow joint; the wrist joint cable drives the branch chain to drive the connecting plate to swing around the wrist joint; the mechanical grabbing device is connected with the lower surface of the connecting plate and can rotate. The robot is simple in structure, large in movement range, low in cost and capable of achieving high-speed grabbing and sorting.