42results about How to "Optimal design work" patented technology

The invention discloses biological tissue multiple frequency impedance measuring method and measuring apparatus thereof, wherein the linear transformation iterate method of curve fitting is first applied to the extraction of biological tissue impedance model parameter, which can realize accurate matching only through limited frequencies. The measuring apparatus includes a single chip machine for data acquisition, a direct digital frequency synthesizer, a voltage control constant-current source, a current electrode, a voltage measurement and reference signal magnification and filtering circuit, an amplitude discrimination device, a shaping and phase detector, a PC and an isolated serial line interface.

The invention provides a neural network adaptive control method applied to a servo system in order to improve the control accuracy of the servo system, which realizes nonlinear compensation and interference suppression of the servo system and improves the tracking accuracy and the robustness of the servo system. In addition, a speed closed loop is not needed, so the entire system can be quite conveniently designed, is easy to implement in engineering and reduces the cost.

The invention provides a neural network self-adaptive control method applied to a servo system, aiming to improve the control accuracy of the servo system. The neural network self-adaptive control method realizes nonlinear compensation and interference suppression to the servo system and improves the tracking accuracy of the servo system. The servo system mainly comprises a reference model, a self-adaptive controller and a neural network controller. In addition, based on a speed ring accurate reference model, a position ring controller is very simple in design so that the whole system is rather convenient in design, thereby being easy to carry out in engineering.

The invention relates to the technical field of refrigerators, in particular to a refrigerator with a shelf adjustable in height. The refrigerator comprises a door shelf body, guide rails and a door shelf front cover, wherein the guide rails are arranged on a refrigerator door body and vertically extend, and the door shelf front cover is connected with the door shelf body. The refrigerator further comprises connecting blocks, sliding blocks and reset mechanisms. Guide grooves are formed in the lateral portions of the door shelf body. The reset mechanisms and the sliding blocks are arranged in the guide grooves. The sliding blocks can slide along the guide grooves. One ends of the reset mechanisms are connected with the guide grooves in an abutting-against mode, and the other ends of the reset mechanisms are connected with the sliding blocks in an abutting-against mode. Sliding block clamping connection parts connected with the guide rails in a clamped mode are arranged on the sliding blocks. One ends of the connecting blocks are connected with the door shelf front cover in a clamped mode, and the other ends of the connecting blocks are connected with the upper portions of the sliding block clamping connection parts in an abutting-against mode. By means of the refrigerator, the user convenience is improved, the position of the door shelf can be adjusted within the height scope limited by the guide rails on the two sides without taking out the door shelf, and the refrigerator is convenient to operate; in addition, the refrigerator is simple in structure and easy to install and manufacture, and the reliability is guaranteed.

The invention discloses a microprocessor system bus and MPI bus conversion device and method, which realize the data communication between the microprocessor system bus and peripheral device MPI bus. In the device, a control signal processing module is used to receive control signals sent by the control bus, when the read operation signal or write operation signal in the control signal is effective, the chip select signal on the MPI bus is made to be effective; a read-write operation module is used to receive and store the first paralleling data transmitted by the data bus when the write operation signal is effective, and to transmit the stored second paralleling data onto the data bus when the read operation signal is effective; a paralleling and serial data conversion module is used to transmit the first paralleling data bit-by-bit in sequence onto the MPI bus when the write operation signal is effective, and to receive a set of serial data with the same bit of the data bus from the MPI bus and stores in the read-write operation module bit-by-bit in sequence to form a second paralleling data when the read operation signal is effective.

The invention relates to a dot matrix material equivalent mechanics property analysis system, relates to the field of material equivalent property analysis, and in particular relates to the field of cellular material equivalent property analysis. The invention aims to solve the problems that the existing dot matrix material analysis process needs many manpower and material resources or needs to be equipped with professional scientific and technical workers. The dot matrix material equivalent mechanics property analysis system comprises a single task data input module, a batch external data read module, an analysis core module, and a result output module, wherein the single task data input module is used for data input of dot matrix material equivalent mechanics property under the single task; the batch external data read module is used for reading data in the batch task database of a user; the analysis core module is used for calculating and analyzing dot matrix material equivalent mechanics property; the result output module is used for outputting structural equivalence flat pressing modulus of a to-be-analyzed object, structural equivalence shear modulus, structural equivalence flat crush strength and structural equivalence shear strength of a to-be-analyzed object. The system is applicable to the dot matrix material analysis.

The invention, which relates to the industrial automation field, provides a matrix type active temperature acquisition control system and acquisition control method for a space camera. Therefore, problems that that existing space camera temperature acquisition control system has the complicated structure and tedious testing process because of lots of cables and devices can be solved. The matrix type active temperature acquisition control system is composed of a temperature acquisition circuit, a temperature sensor, a heater, a heating circuit, a controller, a power module, a temperature acquisition matrix type cable and a heating matrix type cable. The temperature sensor collects temperature information of a corresponding measuring point of a space camera in real time and transmits the temperature information to the temperature acquisition circuit by the temperature acquisition matrix type cable; the temperature acquisition circuit converts the temperature information into a digital temperature signal and transmits the digital temperature signal to the controller; the controller outputs a heating control signal and sends the signal to the heating circuit; the heating control circuit transmits a heating voltage signal to the heater by the heating matrix type cable; and the heater heats the space camera. Therefore, the cable number for the active heat control system is reduced effectively.

The invention discloses a multi-rotor unmanned-aerial-vehicle aerial photography system for traffic design and an implementation method thereof. The multi-rotor unmanned-aerial-vehicle aerial photography system comprises a coordinate transformation system, an air route planning system, an unmanned-aerial-vehicle flight system and a data processing system. The coordinate transformation system comprises a projection parameter setting device, a seven-parameter calculation device, a seven-parameter setting device and a route coordinate transformation device. The air route planning system comprisesan air route segmenting device, a take-off point selection device and a flight parameter setting device. The unmanned-aerial-vehicle flight system comprises a ground control device, a multi-rotor unmanned aerial vehicle and a task loading device. A wireless data transmission link is arranged between the ground control device and the multi-rotor unmanned aerial vehicle. The multi-rotor unmanned aerial vehicle is connected with the task loading device through a holder camera interface. The multi-rotor unmanned-aerial-vehicle aerial photography system has the advantages of rapidness, convenienceand high timeliness in data acquisition, reduced manpower and material resource input, saved cost, direct data perception and the like. By the multi-rotor unmanned-aerial-vehicle aerial photography system and the implementation method thereof, the design of transportation infrastructures can be well carried out.

The invention relates to an assembly fixture for a voice coil motor, which comprises a base and a cover body, wherein the base comprises a body, a pair of first fit parts which are in central symmetry distribution relative to the center of the base, a pair of positioning structures and a first magnet groove; the base body is provided with a first surface, and a second surface opposite to the first surface; the pair of positioning structures are in diagonal distribution relative to the centre of the base body and perpendicular to the first surface of the base body; the first magnet groove is positioned on the second surface of the base and used for accommodating a first magnet; the cover body comprises a body, a pair of second fit parts which are in central symmetry distribution relative to the cover body, and a second magnet groove; the body of the cover body is provided with a first surface, and a second surface opposite to the first surface; the second magnet groove is positioned on the second surface of the cover body and used for accommodating a second magnet and making the second magnet and the first magnet match to provide a magnetism; and the base and the cover body are relatively fixed through the clamping of the first fit parts and the second fit parts.

The invention discloses a three-dimensional model typical structure digging and similarity evaluating method based on simulated annealing. Based on analysis of digging results of typical structures, the algorithm takes maximum groups as output results, the digging characteristics of the 'fuzzy mode' can return multi-layer similarity models, rich and comprehensive types and high flexibility are achieved, and design work of designers in different stages is facilitated. By the algorithm, maximum public sub graphs are communicated, so that digging results of the typical structures conform to similarity perception of human. The simulated annealing algorithm is simple in problem description and flexible to use, and is limited by few initial conditions; due to introduction of randomness factors,the simulated annealing algorithm is more suitable for solving the maximum group problems than conventional searching strategies. Statistical tests of a model base show that the method based on the simulated annealing algorithm has higher typical structure digging performance than other algorithms in the field, and has higher time efficiency than other methods in the field.

The invention provides a multi-target fast optimum design method of a pumping and spraying propeller. The method comprises the following steps that load numerical values of an inlet and an outlet of impeller blades are determined; a parametrization design model of an impeller and guide vane blade loads is established; overall fast search of design variables is completed through a genetic optimization algorithm, and design samples with different blade load distributions are generated; design of the impeller blades is completed through a ternary inverse problem design method, and impeller outlet speed serves as a guide vane inlet boundary condition to complete matching design of guide vanes and the impeller; a wing section structure with good hydrodynamic performance is adopted for a guide pipe outer molded line, and a linear structure is adopted for a guide pipe inner molded line to guarantee the smoothness of a pumping and spraying internal cross section of passage; hydrodynamic performance calculation of a design sample of the pumping and spraying propeller is completed, and efficiency and cavitation performance indexes are quantized; an optimal design sample is selected; performance testing of the optimal design sample is completed through a model experimental method, and effectiveness of the design result is verified. According to the method, optimum design work hard for manpower to complete is completed.

The invention discloses a flow equalization plate, a header pipe, a heat exchanger, a design tool of the flow equalization plate, a design tool of the header pipe, a design tool of the heat exchanger, and a design method of the flow equalization plate. The design tool of the flow equalization plate comprises a mounting plate, a plurality of flow equalization blocks and a plurality of detection devices, wherein a plurality of spaced mounting openings are formed in the mounting plate; flow equalization holes and a detection hole are formed in each flow equalization block; the number of the flow equalization blocks is greater than or equal to that of the mounting openings; at least a part of the flow equalization blocks are mounted on the mounting openings in a replaceable manner respectively; and the detection devices are connected with the detection holes of the flow equalization blocks mounted on the mounting plate respectively and used for detecting fluid pressure on each flow equalization block. A product designed according to the design tool of the flow equalization plate is high in accuracy; modular design can be achieved; the research, development and design cost can be lowered; and the research, development and design efficiency can be improved.

The invention discloses a computer-based transfer coverage rate public transport line station setting evaluation method. The method is characterized by comprising the following steps of: constructing a road network diagram based on public traffic route and station information input by a user, and then finding all stations which can be reached by N times of transfer of a current station; and traversing the stations, solving the shortest path for each station by using a Dijkstra algorithm, and determining the number of times of transfer between the two stations. According to the method, in the public transport planning and layout stage, the reasonability of line and station setting is improved, and the huge construction investment cost caused by too low line utilization rate and unnecessary line adjustment due to subsequent unreasonable planning is reduced.

The invention relates to a vehicle frame wire harness modular design method, device and system and a storage medium, and relates to the technical field of vehicle design, and the vehicle frame wire harness modular design method comprises the following steps: classifying vehicle frame wire harnesses according to the functions of the vehicle frame wire harnesses to obtain a plurality of wire harness modules; generating a wire harness model corresponding to the wire harness module; and according to the wire harness model, the interface type and the interface position of the wire harness module, marking the assembly relationship between the wire harness module and other wire harness modules, wherein the wire harness model is used for showing the structural characteristics of the corresponding wire harness module. According to the vehicle frame wire harness, splitting is carried out according to actual functions to obtain the corresponding wire modules; meanwhile, the wire modules are marked according to the functions, the interface types and the interface positions, the structures and the assembling relation of the wire modules are recorded, and therefore, convenience is provided for later design work.

Disclosed is an MOM capacitor, comprising: a substrate; the first conductive layer is located on the substrate and is a conductive polar plate; the second conducting layer is located on the first conducting layer and comprises a plurality of first electrode strips and second electrode strips which are separated from each other; the third conductive layer is located on the second conductive layer and is a conductive polar plate; the plurality of through holes are used for electrically connecting the first electrode strips to the first conductive layer and the third conductive layer to form a first electrode, the plurality of second electrode strips are electrically connected to form a second electrode, and the polarity of the second electrode is opposite to that of the first electrode; the first electrode strips and the second electrode strips are alternately arranged in a surrounding mode on the plane where the second conductive layer is located. One of the plurality of second electrode strips is located at the center of the plane where the second conductive layer is located, and one of the plurality of first electrode strips is located at the edge of the plane where the second conductive layer is located.