229results about How to "Simple design principle" patented technology

The invention discloses a method for automatically adjusting speed loop control parameters of an alternating-current servo system based on inertia identification, which comprises the following steps: firstly, a current loop and a servo motor are used as generalized objects, and estimated values of the servo motor and the rotary inertia loaded on the servo motor are obtained by the inertia identification based on a disturbance torque observer; and then a pole collocation method is adopted to adjust proportion parameters and integral parameters of a speed loop proportion integration differentiation (PID) controller automatically. In method for automatically adjusting the speed loop control parameters of the alternating-current servo system based on inertia identification provided by the invention, by combining the inertia identification algorithm based on the disturbance torque observer with the characteristics of an alternating-current servo system, auto-adjustment of the speed loop PID parameters for the alternating-current servo system can be realized under different rotary inertias. Engineers do not need to set and adjust the controller parameters manually according to the experience and the system can automatically carry out the auto-adjustment of the speed loop parameters. Compared with the prior art, the method for automatically adjusting the speed loop control parametersof the alternating-current servo system based on inertia identification is simple in design principle, and has the advantages of good adaptability under the condition that the inertia change of the external load equipment is obvious, and the like.

The invention discloses a micro-disturbance-torque environment simulation device suitable for a spacecraft simulated test. The micro-disturbance-torque environment simulation device comprises a base, an air floating ball bearing pair, an adapter ring and an instrument platform. The air floating ball bearing pair comprises an air floating ball shaft, a public buffering cavity, single-row annular gap throttle holes, an air discharging hole, annular gap throttle devices and an air floating ball bearing, wherein the base is installed on a foundation, the lower end of the air floating ball bearing is installed on the base, the air floating ball shaft can be suspended on the air floating ball bearing, the air floating ball shaft can have a three-dimensional rotary freedom degree, the adapter ring is arranged at the upper end of the air floating ball shaft, and the adapter ring is fixedly connected with the instrument platform. The micro-disturbance-torque environment simulation device is simple in design principle, safe and reliable, and meanwhile has the advantages of an ordinary air bearing.

The invention belongs to the technical field of road traffic operation state detection and control, and relates to a road congestion state detection method based on computer vision. The road congestion state detection method specifically comprises the technological steps of firstly classifying and marking data sets formed by processing a large number of collected images to serve as training sets for neural network training, then constructing a convolutional neural network according to the data sets by using a migration model training method, then classifying intercepted real-time traffic monitoring video images through the convolutional neural network, judging the vehicle density state, and finally calculating the optical flow field by using an optical flow algorithm so as to judge the traffic congestion state. The detection method is scientific in design principle and accurate in information collection, the image recognition accuracy reaches 98% and above, the monitoring effect is good, the cost is low, the effect is good, the data calculation method is simple, the judgment accuracy is high, the application is convenient, and the real-time traffic state can be effectively judged.

The invention discloses a wind-electricity variable pitch UPS system based on super-capacitors and the control method thereof. The UPS system comprises a super-capacitor group(10), a charge and discharge circuit(20), a control circuit(30) and a contactor(50). The super-capacitor group(10) is connected with the charge and discharge circuit(20) which is in connection with a DC generatrix(40)through the contactor(50); the control circuit(30), connected with the charge and discharge circuit(20), controls the operation of the charge and discharge circuit(20), and the whole system is connected or not with the DC generatrix(40) through the control of the contactor(50). The UPS system makes use of the control circuit(30) to control energy to flow in two ways between the super-capacitor group(10) and the DC generatrix(40), thus realizing continuous power supply. The UPS system is based on a simple principle and is flexible in structure; meanwhile, the high efficient charge and discharge control strategy can improve energy utilization ratio of the super-capacitor group and reduce installation content and cost of the system, thus greatly improving the technical performance and economic performance of the system.

The invention discloses a rainwater penetrating-discharging integrated ecological system, which comprises penetration inspection wells distributed on the ground of residential areas, penetration drainage ditches which are in a network shape and connected on all the penetration inspection wells and transversal connecting pipes between the penetration inspection wells and the penetration drainage ditches. Permeable holes are formed on the side walls and at the bottoms of the penetration inspection wells, a gravel layer is laid in the peripheries of the penetration inspection wells, a layer of permeable geotextile is laid in the peripheries of the gravel layer, wellheads of the penetration inspection wells are provided with dirt-catching and sewage-blocking baskets therein and permeable well covers are covered on the wellheads; permeable holes are formed on the side walls of the penetration drainage ditches, the peripheries of the penetration drainage ditches are provided with the gravel layer, the peripheries of the gravel layers are provided with a layer of permeable geotexile, and the top parts of the penetration drainage ditches are covered with grate covers of the drainage ditches. The invention has the advantages of simple design principle and convenient construction. The invention can save water consumption, reduce rainwater runoff in a city and relieve municipal drainage pressure, thereby not only realizing early draining of rainwater, purifying water, but also realizing the penetration of rainwater, conserving underground water source and beautifying the peripheral ecological environment.

The invention discloses a time synchronization method in a system of an optical orthogonal frequency division multiplexing-based passive optical network (OOFDM-PON). The scheme comprises an optical line terminal (OLT) and an optical network unit (ONU), wherein the OLT comprises a laser, a modulator, an OFDM signal generating module and an optical multiplexer. The ONU comprises an optical demultiplexer, a time delay compensator, an optical detector and an OFDM receiving module. At the transmitting end of the OLT, optical signals for modulating optical OFDM signals and timing information are divided into two branches. The optical signals are divided into two branches after transmitted by optical fibers, wherein a timing signal is extracted from the branch for carrying the timing information by the optical detector after time-delay compensation, and the OFDM signals are accurately received at the receiving end of the ONU. The invention has the characteristics of simple design principle, easy realization, low cost and the like.

A high-gain low-profile null feed array antenna comprises a metal cover plate, a metal side plate, a metal bottom plate and a feed source. The metal cover plate locates at the upper part, the metal bottom plate locates at the lower part and the metal side plate locates at the middle part; the metal cover plate, the metal bottom plate and the metal side plate are connected with each other to form a cavity in which the feed source is arranged; the metal cover plate is a metal flat plate which is provided with a group of gap units arranged periodically; the feed source comprises a feeding patch located in the middle of the housing and a group of passive parasitized patches around; the feeding patch and the parasitized patch are printed on the upper surface of a same dielectric substrate; the lower surface of the dielectric substrate is attached on the upper surface of the metal bottom plate; and the feeding patch is activated by a cable through a radio frequency coaxial joint. The antenna has the advantages of simple feeding, high gain of more than 20dBi, high caliber efficiency of more than 60 percent and low cost.

The invention relates to a sucking-type underwater manipulator and a sucking method thereof. A main oil pump of a robot hull provides hydraulic oil for hydraulic cylinders and hydraulic motors of the manipulator through multilevel flexible hydraulic oil pipes. A manipulator base is connected with the hull through a universal ball at the top and is connected with three hydraulic cylinders which control the manipulator base. A single-level hydraulic cylinder is fixed on the lower portion of the manipulator base. A telescopic shaft of the single-level hydraulic cylinder is connected with the base through a sleeve shaft. A hydraulic motor is mounted on the sleeve shaft and is used for driving the manipulator base to rotate. Eight manipulator wrists controlled by the hydraulic cylinders are mounted on the base. A certain quantity of sucking disc rod groups are mounted on the bottom surface of each manipulator wrist. The object grabbing and adsorbing method of the sucking-type underwater manipulator is similar to that of an octopus living under the sea, sucking discs are squeezed and liquid in cavities of the sucking discs is drained under the acting force of the manipulator wrists to objects, and the sucking discs are enabled to be adsorbed to the surfaces of the objects. Under the joint action of grabbing force of the manipulator wrists and adsorbing force of the sucking discs, the manipulator has a better object grabbing capability.

The invention discloses a cloud storage based load balancing calculating method. When a file write-in request is received, a load balancing module in a central coordinator distributes input file blocks in a mode of balancing all the public cloud storage node loads, wherein the load balancing module consists of three sub-modules including a coordinator agent sub-module, a node positioning sub-module and a load balancing sub-module. The load balancing calculating method comprises the following steps: (1) acquiring the state information of the storage nodes; (2) calculating the storage nodes with relatively light loads and recording the IP addresses; (3) calculating the size of loads to be moved and moving data; (4) repeating the steps (1-3) until the load of the storage nodes is balanced. According to the invention, the quantitative approaches of the load states of the public cloud storage nodes are given, and the core algorithm of the load balancing of the public cloud storage cluster is clear, and the cloud storage based load balancing calculating method has the attribute characteristics of practicability and high efficiency.

The invention discloses a weight supported walking rehabilitation training robot. The robot comprises a machine frame and a frame body, wherein the frame body is mounted on the machine frame; supporting rods are arranged below the machine frame; driving motors are arranged at the lower ends of the supporting rods; wheel seats are arranged below the driving motors; small roller wheels are connected to the lower ends of the wheel seats; two sliding seats are arranged on the machine frame; fixing screws are arranged in the sliding seats; armrests are arranged on the sliding seats; a mechanical external skeleton is connected to the lower end of the machine frame; a back supporting plate is arranged between the two armrests; a rotary shaft is arranged at the upper end of the frame body; the rotary shaft is connected with a suspension vest through an elastic rope; and a control box is arranged on the machine frame and is connected with a remote controller through a wireless network. According to the robot, a patient can move very well and the joy of the patient during rehabilitation is enriched; and the whole robot is compact in structure and simple in design principle, has a very good useful value and is worthy of popularization.

The invention discloses a multi-rotor-wing unmanned aerial vehicle. The multi-rotor-wing unmanned aerial vehicle comprises a rack, an undercarriage and rotor wings, wherein the undercarriage is arranged at the lower end of the rack; a supporting plate is arranged at the upper end of the rack; the supporting plate is connected with rotor wing rods; the four rotor wing rods are arranged and the rotor wings are arranged on the rotor wing rods; positioning pins are arranged on the supporting plate; a rotary shaft is arranged between the supporting plate and the rack; the rack is internally provided with a battery box; a control box is arranged at the lower end of the battery box; a main control chip is arranged in the control box; a rotary seat is arranged at the lower end of the control box; a periscopic camera is connected with the lower end of the rotary seat; infrared signal receivers are arranged at the two ends of the periscopic camera; the control box is connected with a remote controller through an infrared signal; a buffering rubber sleeve is bound on the undercarriage; weight-increasing balls are arranged at the two ends of the undercarriage; sponge sleeves sleeve the outer sides of the weight-increasing balls; very good tracing and photographing can be realized; the plurality of rotor wings are arranged so that the flight of the unmanned aerial vehicle is more stable; the unmanned aerial vehicle has relatively high wind-resisting property and is worthy of being popularized.

The invention belongs to the field of automatic control, and relates to single-lane dual-direction passing warning, in particular to a community single-lane vehicle entrance and exit warning system. The community single-lane vehicle entrance and exit warning system achieves the technical aims of being clear in guidance, rapid in permit through and free of waiting time spent by the owner of a vehicle. According to the technical scheme, after a vehicle entrance and exit card reader receives a remote control or card reading signal, the remote control or card reading signal is input to a vehicle entrance and exit LED warning lamp, and a green warning lamp body of the vehicle entrance and exit LED warning lamp is turned on; when the vehicle runs out of a vehicle entrance and exit ground induction coil, the vehicle entrance and exit ground induction coil transmits an induction signal to the vehicle entrance and exit LED warning lamp, a red warning lamp body of the vehicle entrance and exit LED warning lamp is turned on, meanwhile, a vehicle entrance and exit camera body of a camera shoots the corresponding license plate number, and videos and pictures are input to a host and stored into a corresponding hard disk through a video card. The community single-lane vehicle entrance and exit warning system can be widely applied to a community only with the single entrance and exit lane.

The invention discloses a Ka-band high-power linearly-circularly polarized converter, and belongs to the technical field of high-power millimeter waves. The converter comprises a supporting structure, a fixing circular ring, an installing stop ring and a metal circular plate. Polarization conversion is realized by the rectangular hole structures periodically arranged on the metal circular plate. The structure has the advantages of being simple in design principle, convenient to process, wide in work frequency band and low in cross polarization level. The rectangular holes are arranged in an isosceles triangle so that the relative space between the units is enabled to be reduced and the influence of grating lobes can be effectively reduced; and quarter arc segments are used as the four corners of the rectangular unit holes so that the local field intensity of the edges and the corners can be reduced, the power capacity of the device can be enhanced and the high-power work requirement can be met. The inclined angle of the metal circular plate and the polarization direction of the incident linearly polarized waves can be adjusted so that selection and switching of left-hand circular polarization and right-hand circular polarization of the emergent waves can be realized; meanwhile, the converter also has the advantages of low transmission loss and great heat radiation.

The invention provides a multi-head mixer, comprising a motor, a reducer, a mixing shaft and a mixing blade; the mixing blade is arranged at the end of the mixing shaft. The mixer is characterized in that the end of the mixing shaft is fixed with a transverse shaft; two ends of the transverse shaft are symmetrically and fixedly provided with two short shafts which are parallel to each other; two ends of each short shaft are symmetrically fixed with a connecting shaft; two ends of the connecting shaft are provided with a mixing blade. The multi-head mixer of the invention increases the mixing blades, enlarges the mixing area, leads the raw material to have good mixing effect in a reaction kettle, improves the mixing efficiency, speeds up the reaction rate and improves the yield. Meanwhile, the mixer of the invention has simple design principle, is convenient for processing, has convenient installation and usage, high mixing efficiency and saves the power energy.

The invention relates to an automatic irrigation device, in particular to an automatic irrigation controller controlled by a single chip microcomputer. The automatic irrigation controller comprises a controller body (1), a protection shell (2), a switch (3), a sounding device (4), a display screen (5), a keyboard (6), a power jack (7), a data input circuit (8), a sensor (9), a function selection circuit (10), a power supply (11), an electromagnetic valve control circuit (12), an electromagnetic valve switch (13), a program memory (14), a data memory (15), the single chip computer (16) and a display module (17). The automatic irrigation controller is characterized in that the controller body (1) is provided with the single chip microcomputer (16), the input and output port of the single chip microcomputer (16) is in input connection with the program memory (14), the program memory (14) is in input connection with the function selection circuit (10), the single chip microcomputer (16) is in input connection with the display module (17), and the controller body (1) is provided with the sounding device (4) and the display screen (5).

The invention discloses a workpiece length correcting device comprising a support frame (1) for supporting a workpiece. The workpiece length correcting device is characterized in that one side of the support frame (1) is provided with an initial baffle (2) serving as the initial position of the workpiece; the other side of the support frame (1) is fixedly provided with a measuring main body (3) for detecting the workpiece length tolerance. The device improves the workpiece inspection efficiency, solves the problems of low original manual inspection efficiency, high error and the like, can realize the workpieces inspection in bulk, reduce manual working hour by more than 50 percent and lower the inspection cost.

The invention provides a composite compensation device for long-distance sparse power supply. The input is a power supply line input end, and the output is a power supply line output end. The device comprises a voltage boosting system and an electric energy quality boosting system, wherein the voltage boosting system comprises a voltage boosting compensation transformer, a voltage boosting power electronic converter and a voltage boosting control unit; and the electric energy quality boosting system comprises a contactor, an electric energy quality boosting compensation transformer, an electric energy quality boosting power electronic converter and an electric energy quality boosting control unit. According to the invention, the power electronic converter and the compensation transformer are used for injecting a current and a voltage into a power grid and performing real-time control, thereby achieving the comprehensive power quality improvement of power harmonic waves, power factors, three-phase imbalance compensation and the like and the voltage compensation function of a sparse power utilization area of a long power transmission line. The device has important significance on power supply radius extension, investment saving and power grid safety of the sparse power utilization area.