47results about How to "Reduce design error" patented technology

The invention discloses a parametric two-dimensional drawing/three-dimensional model intelligent conversion method. The method comprises the steps that all design parameters of a plotting image are stored in a database; the design parameters, in the database, of the plotting image are extracted and cached, the design parameters are assigned to two-dimensional drawing plotting elements or three-dimensional model setup elements, drawing software is called, and a plotting image two-dimensional drawing is made or a plotting image three-dimensional model is set up according to two-dimensional drawing plotting element parameters; and the two-dimensional drawing plotting element parameters or three-dimensional model setup element parameters are cached, the cached two-dimensional drawing plottingelement parameters or three-dimensional model setup element parameters are stored into the database, and the database is updated. Through the method adopting the technical scheme, a two-dimensional drawing making module and a three-dimensional model setup module share the same design parameter database and call identical design parameters, therefore, the generated two-dimensional drawing and the three-dimensional model can correspond in design parameter and structure, drawing efficiency is effectively improved, and drawing errors are reduced.

The invention discloses an intelligent turnout aided design system. The aided design system includes a parts graphics library and a knowledge base module, a general layout quick design module, a parts design graphics generation module, a BOM table generation module and a system working area. According to the system, a general layout can be generated according to main design parameters such as turnout number, rail distance, and constraint rules; according to the design parameters, parameterized graphics of switch, frog, guard rail, basic rail, sharp rail are automatically generated; an inference engine based on RETE algorithm is responsible for completing the constraint analysis and constraint solving of turnout key parts; according to the actual use demands, the graphics library is expanded in a customized mode to generate new parts graphics; scheme comparison is conducted according to the preset knowledge base, and the best solution is selected by an expert decision support system. According to the intelligent turnout aided design system, the design cycle of turnout can be shortened, design error is reduced, and indirect overhead is saved.

The invention relates to a method for designing en interface for an electric system, in particular to a method for designing an interface with harmonic characteristic hybrid simulation function. The method comprises the following steps: 1, building a Thevenin equivalent interface matrix and an interface equivalent voltage source; 2, building a frequency-dependent equivalent model; and 3, building an equivalent interface circuit of a multi-frequency harmonic power supply. The method not only combines the interface model frequency harmonic characteristics of an electromechanical transient subnetwork, but also utilizes the harmonic source characteristics of the electromechanical transient subnetwork, can transmit the harmonic characteristics of the electromechanical transient subnetwork to an electromagnetic transient subnetwork for calculation, and increases the precision and reliability of the simulating calculation.

The invention relates to the technical field of pump body hydraulic design, in particular to a transitional flow channel structure of a multi-stage centrifugal pump and a design method of the transitional flow channel structure. The transitional flow channel structure is formed by splicing a plurality of stages of transitional flow channels. Each stage of transitional flow channel comprises a pumping chamber, a diffusion elbow and a water absorbing chamber, wherein the pumping chamber communicates with the water absorbing chamber, and the diffusion elbow is arranged on the outer side of the water absorbing chamber; and a water inlet of the diffusion elbow communicates with a pumping chamber of the same stage, a water outlet of the diffusion elbow communicates with a next stage of water absorbing chamber, the water absorbing chamber is in a full spiral shape, and the diffusion elbow is annular. By adopting the annular diffusion elbows, the transitional flow channel is smoother, the size is greatly reduced, and a pump body is compact in structure and better in intensity. In addition, one full-spiral water absorbing chamber is additionally arranged in front of an inlet of a next stage of impeller, the fluid absorbing performance is better, and the flowing speed is even and stable.

The invention discloses an intelligent aided design system for a platform door. According to the system, all design parameters of the platform door are stored in a database; the design parameters of the platform door in the database are extracted and cached, the design parameters are assigned to a first-class drawing plotting factor or a second-class drawing building factor, plotting software is called, and a first-class drawing of the platform door is plotted according to first-class drawing plotting factor parameters, or a second-class drawing for building the platform door is plotted according to second-class drawing building factor parameters; the first-class drawing plotting factor parameters or the second-class drawing building factor parameters are cached, the cached first-class drawing plotting factor parameters or second-class drawing building factor parameters are stored to the database, and the database is updated. The technological scheme further discloses application of the intelligent aided design system. A first-class drawing plotting module and a second-class drawing building module share the same database, and the same design parameters are called so that the design parameters and the structure of the generated first-class drawing can correspond to those of the generated second-class drawing; the plotting efficiency is effectively improved, and the plotting error is reduced.

A directly loaded passive tension compensator for disk spring is composed of disk spring sets, a locating rotary arm, a shifting rotary arm and a load regualtor. A pair of disk spring sets is mounted in casing with press plate in its front end. Said two rotary arms are mounted to the casing in movable mode. Its rectangular metal base has horizontal and vertical slots. Its advantages are compact structure, high reliability, high utilization rate of disk spring, constant force output, and flexible load regulation.

The invention relates to a high temperature cooler heating power check method and system. The method comprises the following steps that cooler inlet parameters and the quantity of heat exchange tube groups in a cooler are obtained, wherein each heat exchange tube group comprises a plurality of rows of tube bundles; and the cooler inlet parameters are used as an inlet condition of first-row tube bundles, an outlet condition of each row of tube bundles is used as the inlet condition of the next-row tube bundles, and heat transfer and pressure drop of all rows of tube bundles are calculated row by row. By means of the high temperature cooler heating power check method and system, according to the thought of calculating heating power characteristics of all tube bundles row by row in a heat exchanger, determination of high-temperature gas qualitative properties under the large temperature difference condition can be reduced, and the design error is reduced; and heat transfer, pressure dropand heat exchange tube wall temperature distribution, which cannot be given by a traditional heat exchanger heating power design checking method, inside the heat exchanger can be given, and it is conducive to timely find problems in the heat exchange scheme design stage to make modification and adjustment.

The invention relates to a wire harness production and assembly system of digital electrical complete sets of products. The wire harness production and assembly system comprises an MES system, whereinthe MES system is connected with a product design system for carrying out wiring design on the electrical complete sets of products, and a production execution system used for producing the wire harness required in the electrical complete sets of products, and further comprises a process parameter library for storing the wire harness wiring process of each type, wherein the product design systemand the process parameter library are connected through a digital twin-generation system; final assembly simulation of electrical complete sets of products can be carried out in the design stage, andthe electrical components in the electrical equipment can be placed in the optimal positions, wire binding workers do not need to carry out secondary arrangement, the professional requirements of thewire binding workers are reduced, and the labor cost is reduced; meanwhile, the automatic dosing production of the wire harnesses is realized, the wire harnesses can be produced according to needs, the wire harness waste can be effectively avoided, the raw materials are saved, and the production cost is reduced. The method has the advantages that the transformation of electrical industry manufacturing to digital intelligent manufacturing from traditional manual operation is realized.

The invention provides an inducer with high cavitation resistance. The inducer is characterized in that at least two layers of meridional flow channels which do not communicate with each other are arranged on the outer side of a wheel hub of the inducer, and any two adjacent meridional flow channels are isolated by a flow channel partition plate; the cross section circulation area of any meridional flow channel is gradually reduced in the flow direction; the outlet area of any meridional flow channel is smaller than or equal to the inlet area; at least one blade is arranged in any meridional flow channel, and the blade inlet edges and the blade outlet edges in the different meridional flow channels are arranged in a staggered manner, so that the outflow uniformity of the inducer is improved; the blade inlet edges are swept back and rounded, so that the cavitation resistance is improved; and the blades are spiral blades, and the screw pitch of the spiral blades are equal screw pitch orvariable screw pitch or the combination of the equal screw pitch and the variable screw pitch. According to the inducer, the cavitation resistance is improved by increasing the number of the meridional flow channels.

The invention discloses an integral-type digital temperature sensing circuit. The integral-type digital temperature sensing circuit comprises a PTAT circuit module, a switch, a CTAT current module, anintegrator, a window comparator and a control and conversion logic component. The integrator comprises an integral capacity and an amplifier. The two ends of the integral capacity are connected to aninput end and an output end of the amplifier. The control and conversion logic component comprises a controller, a counter, a temperature calculator and two SPI modules. The circuit has advantages that a low power supply voltage work condition is not considered in the prior art, but the circuit of the invention adapts to the low power supply voltage work condition; a chopper technology is used toreduce a design error; and the circuit has high flexibility and adjustability, and good stability.

The invention discloses a test method for simulating gravel stratum grouting diffusion radius under flowing water environment, and belongs to the technical field of the grouting material performance test equipment. The method is characterized by comprising the following steps: a, collecting gravel samples at the field, and filling in a stainless steel tank body; b, vertically inserting a groutingpipe and a water injection pipe into the gravel sample, and adjusting overflow pressure of an overflow valve; c, respectively starting the grouting pump and the water injection pump; d, observing seepage characteristics of the grouting seriflux in the gravel samples; and e, taking out the gravel samples after the grouting is ended for 24 hours, observing diffusion characteristics of the grouting seriflux in the gravel samples, and measuring axial diffusion distance of the grouting seriflux in the gravel samples. The visual simulation of the diffusion process of the grouting seriflux in the gravel stratum under the flowing water environment is realized, the diffusion rule of the seriflux in the gravel stratum under the flowing water environment can be quantitatively described, and the testmethod has the features of being good in flowing water environment stability, and high in seriflux diffusion parameter accuracy.

The invention discloses a table-board preview body generation method in home decoration design and a table-board design system, belongs to the field of furniture design, and specifically comprises thefollowing steps: obtaining a two-dimensional table-board graph and a table-board height; and according to the two-dimensional table-board image and the table-board height, generating a three-dimensional table-board preview body in real time at the design terminal and visually displaying the three-dimensional table-board preview body in real time. Through the obtained two-dimensional table-board graph and the table-board height, a three-dimensional table-board preview body can be rapidly generated in real time at a design terminal and visually displayed in real time, so that a user has an intuitive feeling on the table-board when watching the three-dimensional table-board preview body, and design deviation caused by the fact that the user does not have an intuitive feeling when watching the two-dimensional table-board is avoided; therefore, the design accuracy of the user can be improved, and the design error is reduced.

The invention discloses a test device for simulating a grouting diffusion radius of a gravel formation under dynamic water environment, belonging to the technical field of test equipment of grouting material performance. The test device comprises a support and a steel stainless box body, and is characterized by further comprising a grouting pump and a water injection pump, wherein the steel stainless box body comprises a first front baffle, a second front baffle, a first semi-circular half close tube, a second semi-circular half close tube, and a rear cover, the steel stainless box body is internally provided with a sand block plate which is close to the rear cover, the sand block plate is connected with a telescopic screw, the telescopic screw penetrates the rear cover, the steel stainless box body is provided with a grouting hole and a water injection hole, the grouting hole is connected with a grouting tube, the grouting tube and the grouting pump are connected, the water injectionhole is connected with a water injection tube, and the water injection tube and the water injection tube are connected. The test device can quantitatively describe and analyze diffusion rules of groutin gravel formation under dynamic water environment, thereby greatly reducing a design error of a grout diffusion radius in engineering design.

The invention discloses a terrace type reclamation parameter optimization method considering mining subsidence deformation. The terrace type reclamation parameter optimization method comprises the following three parts: 1, a terrace section optimization method considering crack filling; 2, terrace section optimization considering surface gradient change; and 3, a terrace construction process considering crack filling: firstly, dividing a treatment area into a plurality of sections along the length direction of the terrace, dividing the sections into schematic diagrams, then treating by taking the sections as units, and determining the length of each section according to the operation benefit of construction machinery.

The invention discloses an SPT coefficient based FIR filter optimization method. The method comprises that (1) the coefficient vector, with infinite word length, of the FIR filter is obtained, and elements in the coefficient vector, with infinite word length, of the FIR filter are ordered according to absolute values from high to low; (2) the gain value space of the filter coefficient is set, the coefficient vector, with infinite word length, of the FIR filter is cut, multiple SPI items are distributed while cutting is implemented in each cycle, and the distribution efficiency is greatly improved; (3) the gain coefficient gain corresponding to the condition that the needed SPT items are minimal is selected; and (4) a greedy algorithm is utilized to implement optimization, the performance of the filter is further improved on the basis of a cutting step, the Minimax error is reduced, and the SPT items are utilized fully to improve the design performance of the filter. The method of the invention can be used to obtain high filter performance and higher computing efficiency.

The invention discloses a portable cloth cutting and punching device, and belongs to the field of apparel manufacturing. The portable cloth cutting and punching device comprises a cutting structure, apunching structure and a fixing structure; the punching structure and the fixing structure are detachably mounted on the cutting structure. A main body of the punching device is of a cutting knife structure, the various positions of the cutting knife are improved, and different structures are detachably mounted on the various positions of the cutting knife, so that the effects that cloth is cut,holes in different shapes are punched, and cloth chips are cleaned are reached, and the portable cloth cutting and punching device is simple in structure, is multifunctional and portable, and is verypractical for small apparel designers and processors.