666results about How to "Reliable design" patented technology

The invention relates to an analytical design method of a camber and a surface shape of an automobile plate spring, belonging to the field of automobile springs. According to the invention, the performances of a suspension are influenced by the camber and the surface shape of the plate spring, but an accurate design method for the camber and the surface shape is not provided. According to the performance requirements of the automobile suspension on the plate spring, the analytical design method of the camber and the surface shape of the automobile plate spring can be established by using elastic mechanical theory. The analytical design method of the camber and the surface shape of the automobile plate spring, provided by the invention, is simple and reliable, and requirements of precise design of the thickness of the automobile plate spring can be satisfied by utilizing the analytical design method. The analytical design method can be used for design of the vehicle suspension plate spring.

A microapparatus (11) implantable in the eye (13) comprises a cuasi-bistable microvalve (21) commanded by an intraocular pressure sensor (23) in situ. The microvalve mechanism includes a diaphragm (27) made of a conjugated polymer (29) that shows high deformation and biocompatibility capabilities and which volume depends from the electric potential applied by its pair of electrodes (31). The sensor and actuator-valve are coupled to a drainage conduit (15), the first to deform by the pressure in the ocular globe and the second in a position of buckling to normally close the drainage conduit. The sensor us a membrane of conductive polymeric material with the same properties and whose ohmic resistance varies with the mechanical deformation produced by the ocular pressure.

This invention provides buildings with a modular air conditioning system that utilizes solar energy for heating air. This invention contains a solar collector assembly, an inlet assembly and an outlet assembly. The solar collector assembly further comprises a transparent panel, a heat-absorbing set and a support base, and forms paths for heating the air, wherein the heat-absorbing set is made of several simple, light-weight modular heat-absorbing units to form several heat-absorbing channels. Such a design not only can fully utilize the heat-absorbing space on the roof and save the cost for being displayed in marketing channels, but also can be constructed by the users in accordance with their own needs, so as to save cost in modularization. The inlet and outlet assemblies communicate to the heat-absorbing channels in the solar collector assembly and are respectively connected to the pipes and paths leading into and out of the buildings. By switching and adjusting the openings of these pipes and paths, in winter, the preheated air will be introduced into buildings; and in summer, the hot indoor air will be expelled out of the buildings and fresh air will be guided into the buildings. As a result, a more economical air conditioning system is formed.

A target system for light infantry weapons including a target overturnable by an impact and an actuating mechanism configured to move the target. The target is connected to the actuating mechanism via a pivot structure. Further, the actuating mechanism includes a lifter configured to lift the target to a substantially upright position, a vertical rail system and a carriage vertically moveable along the vertical rail system, and an electric motor configured to move the carriage along the vertical rail system. Also, the pivot structure is arranged on the carriage, and the lifter includes a supporting lifter device, against which the target falls when hit and which, when the carriage is lowered, lifts the target to the substantially upright position utilizing the movement of the carriage and an inertia of the target. In addition, the target system is portable and of modular construction.

The invention belongs to a metal-base film thermocouple and a preparation method thereof. The thermocouple comprises a metal substrate to be tested and a NiCrAlY alloy transitional layer arranged on the top face of the metal substrate, wherein a metal aluminum layer, an AlN layer, an AlN ceramic insulation layer, a thermocouple film electrode assembly and an aluminum oxide protective layer are formed on the transitional layer in turn. The production method comprises: processing the metal substrate to be tested; preparing a composite substrate with the NiCrAlY alloy transitional layer; precipitating metal aluminum; nitriding the aluminum; sputtering and depositing the AlN insulation layer; and setting the film thermocouple group and covering the aluminum oxide protective layer. In the invention, the AlN ceramic material with high coefficient of heat conductivity and high insulating performance is used as the insulation layer, so the temperature difference between the metal substrate and the surface of the insulation layer and the thickness of the insulation layer are reduced considerably; and thus, the metal-base film thermocouple has the characteristics of effectively reducing measurement error, improving the consistency between the temperature measured by the thermocouple and the actual temperature of the metal substrate to be tested, improving reliability, providing accurate and reliable basis for the design of turbine engines, and the like.

The present invention relates to a multipath voltage stabilizing isolated digital DC / DC electric power source and a control method thereof. The DC / DC electric power source comprises the following components: a main power topological, an isolated transformer, an primary controller, a secondary controller, a driving circuit, a voltage and current detecting channel, a feedback and sampling channel, a primary accessory electric power source, a secondary accessory electric power source, a parameter memorizer and a communication interface. In the DC / DC electric power source control method, the DC / DC electric power source is leaded to start to operate with a soft starting mode through the primary controller, and the fixed duty ratio of the dead zone of the complementary belt is outputted when the soft starting has finished to control the main switch component of the converter. The secondary controller does setting according to the prearranged parameter. The electrifying time-delay of each path is set according to the starting time sequence, and a mode of soft starting is adopted for outputting the voltage of each path. The invention relates to a full-digitally controlled DC / DC electric power source, wherein the hardware compensation network is replaced by the software code, and the electric power source according to the invention has the advantages of broad range of the adapting temperature and strong interference resistance. And at the same time the controller parameter, the electrifying time sequence, the protecting threshold and the like can be modified flexibly.

A portable oxygen concentrator designed for medical use with a novel housing and internal component design that reduces noise and vibration while increasing durability. The improved design of the portable oxygen concentrator further facilitates easy maintenance and repair over the life of the equipment.

The invention discloses a hydro-pneumatic suspension control loop. The design key point of the invention comprises that: a communication relationship between a suspension oil cylinder rodless cavity and an energy accumulator at the same side is controlled by a two position two-way valve to realize rigid and flexible conversion of a suspension system; each suspension oil cylinder rod cavity is communicated with an energy accumulator at the opposite side so as to obtain relatively strong side tilting rigidity; and communication relationships between a pressure oil line and the suspension oil cylinder rodless cavity and between an oil return oil line and the suspension oil cylinder rodless cavity are controlled by a two position two-way valve, respectively so as to control the lifting of a vehicle body. In the multi-axle vehicle hydro-pneumatic suspension system provided by the invention, all the middle axle hydro-pneumatic suspension control loops and rear axle hydro-pneumatic suspension control loops form a lifting control group so as to level the vehicle body. The hydro-pneumatic suspension control loop provided by the invention has reasonable and reliable design and higher comprehensive performance of the suspension system, and is suitable for a multi-axle vehicle, particularly for a multi-axle construction crane. The invention also provides a crane using the hydro-pneumatic suspension control loop.

The invention of novel methods is described for efficient and accurate thermal simulation of a structure that can be primarily constructed using building blocks. These structures may include, but not limited to, semiconductor chips, photovoltaic / solar panels, battery packs, etc. The methods are formulated in hierarchical function spaces, rather than the physical space and provide three-dimensional (3D) steady-state and transient temperature profiles of the structure, which are as detailed as full-scale numerical simulation, using substantially less computational degrees-of-freedom (DOF). The number of DOF required is comparable to that of lumped thermal models, yet no ad-hoc modeling assumptions related to geometry, dimensions, temperature profiles, or heat flow paths are required. The methods can be applied to evaluate temperature profiles at different levels of granularity. The methods can also be implemented in various computer-aided-design (CAD) or electronic-design-automation (EDA) tools for different technologies to perform electro-thermal simulations.

The invention discloses a method for designing a water-spraying boost pump hydraulic model for an efficient and large-power-density ship. The method comprises the following steps that type selection design of water-spraying boost pump hydraulic parameters is conducted, two-dimensional axial face projective geometry is determined, three-dimensional geometrical shapes of an impeller and guide blades are obtained according to a parameterized ternary reversal design method, a three-dimensional geometrical shape of a shrinkage nozzle is obtained through circumferential rotation, the three-dimensional geometrical shapes of the impeller, the guide blades and the shrinkage nozzle are combined to obtain the water-spraying boost pump hydraulic model. The method has the outstanding advantages that the design period is short, the design quality is high, and the water-spraying boost pump hydraulic model which has the advantages of being high in efficiency, compact and large in power density can be rapidly and reliably designed. The geometrical shapes of the impeller and the blades are obtained according to the parameterized ternary reversal design method, so that on the condition that the water-spraying boost pump hydraulic model is kept compact, the efficiency is improved, cavitation is restrained, and the power density is increased in the researching and developing process of a high-speed ship water-spraying boost pump.

In an operating table comprising a table column (10) with a column foot (14) and with a column head (16) and also a patient bed (12) which is connectable to the column head (16) and which is pivotable in relation to the table column (10) about at least one axis parallel to the bed plane, the column head (16) has provided on it a guide track (42) which is curved continuously about an axis of curvature and on which a saddle coupleable to the bed (12) is mounted such that it can be adjusted along the guide track (42) by means of a saddle drive.

A portable oxygen concentrator designed for medical use with a novel housing and internal component design that reduces noise and vibration while increasing durability. The improved design of the portable oxygen concentrator further facilitates easy maintenance and repair over the life of the equipment.

A portable oxygen concentrator designed for medical use with a novel housing and internal component design that reduces noise and vibration while increasing durability. The improved design of the portable oxygen concentrator further facilitates easy maintenance and repair over the life of the equipment.

A portable oxygen concentrator designed for medical use with a novel housing and internal component design that reduces noise and vibration while increasing durability. The improved design of the portable oxygen concentrator further facilitates easy maintenance and repair over the life of the equipment.

A portable oxygen concentrator designed for medical use with a novel housing and internal component design that reduces noise and vibration while increasing durability. The improved design of the portable oxygen concentrator further facilitates easy maintenance and repair over the life of the equipment.

A method and structure for a semiconductor device can include a chip support having a one or more elongated structures formed in the chip support The elongated structures, which have a width and a length greater than the width, receive chip attach material such as epoxy during a chip attach process. Because each elongated feature is oriented such that an axis through a center of the length of each elongated feature points to a center of the chip support, the chip attach adhesive flows into the feature with minimal trapping of air. Trapped air can cause delamination of the chip from the chip support, or cracking of the chip and device failure.

The invention discloses a dynamic avoidance method for multiple robots in collaborative operation. The method comprises the steps: carrying out the path pre-planning of all tasks in a task pool according to the priorities, and reducing the conflict intervention between robots from a planning layer; monitoring the current operation states of all the robots, dynamically pre-judging the safety distance, generating different types of stop points, coordinating the operation of the robots, and solving the technical problems of collision, delay, interlocking and the like during the cooperative operation of the robots. Overall scheduling is carried out to optimize resource distribution, traffic control and coordinated avoidance are achieved, local peer-to-peer communication solves the overall operation problem after the robot individual is abnormal, and therefore the robustness of the whole scheduling system is guaranteed. The method is suitable for multi-robot scheduling avoidance scenes suchas factory automation and storage commodity transfer.

The invention relates to internal resistance detection of a fuel cell, specially an online electrochemical impedance spectroscopy detecting system and method of the fuel cell. The excitation source of the system is integrated in a Boost circuit, the excitation source is unnecessary to generate triangular waves in the whole process, the Boost circuit controls the fuel cell current to generate the current formed by superimposing direct current and slight triangular waves not influencing the work of the cell, after the work of the fuel cell is stabilized, Fourier analysis is carried out to the voltage and the current of the fuel cell; the internal resistance value of the fuel cell under every frequency is obtained, and the electrochemical impedance spectroscopy of the cell is obtained. With respect to the given triangular waves of the system, the triangular waves of three frequencies are given successively by a selection mode so as to be convenient in measurement; with respect to the control of the current, the current of the cell is controlled by prediction control; the whole system overcomes the defect of the design of the excitation source and the defect that the frequency scanning time of using sine waves is long.

A crawling device is used for surrounding a cylinder and crawling along the extension direction of the mentioned cylinder. The kind of crawling device may include at least two-nodes crawling modules, a telescopic mechanism, and a control circuit. The telescopic mechanism connects with two-nodes crawling modules, and the crawling modules have an elastic mechanism and a drawstring respectively. In creeping movement, the at least two-nodes crawling modules are set in turn that one crawling module as a fixed section and the other crawling module as a mobile section. When the crawling module is set as a fixed section, the crawling module adjusts the drawstring through the elastic mechanism to make the fixed section close to the cylinder. Producing friction by keeping close to the cylinder let the fixed section maintain the fixed state relatively close to the cylinder.

A kicktail concave skateboard includes a blank having opposite ends, at least one end being recessed. An element is mounted on the recessed end such that a portion of the element adjoining the blank is flush with the blank. The element is formed of a material having a lower mechanical damping capacity and a higher modulus of elasticity than the blank. The element includes a downwardly facing exposed side having a downward projection thereon, to facilitate the execution of an "ollie" maneuver.

A radial flow reactor vessel is disclosed for use in gas purification, separation or reaction processes and most suitably used in prepurification processes. The reactor has internal baskets for confining a bed of active material. The baskets are rigidly supported at both the top and bottom ends of the reactor and have walls that are axially flexible and radially rigid. The vessel has multiple movable support columns designed to facilitate pre-stressing of the baskets to offset axial compressive loads induced from thermal cycling.

A lighting unit having a battery-powered auxiliary light source that is automatically powered in the event of a power outage. The lighting unit can be an integral portion of a lamp, configured as an add-on to an existing lamp, or configured as a standalone light source. The lighting unit includes a device for rectifying AC power supplied to the unit to generate DC power, a battery and a device for charging the battery from the AC power, a relay powered by the DC power and with input contacts electrically connected to the battery, and at least one LED light source electrically connected to output contacts of the relay. The relay is configured so that it interrupts current flow from the battery to the LED light source when the DC power is supplied to the relay as a result of AC power being supplied to the rectifying device, and the relay automatically enables current flow from the battery to the LED light source when the DC power to the relay is interrupted as a result of AC power to the rectifying device being interrupted.

A memory circuit comprising a memory cell which has a resistance memory element and is connected between a ground terminal and a capacitance has a reference memory cell with a reference resistance which is connected between the ground terminal and a reference capacitance, in which case, during the reading operation of the memory cell, the memory cell and the reference memory cell are switched on in order to charge or discharge the capacitance and the reference capacitance, and an evaluation device evaluates the difference between the electrical potentials of the capacitance and the reference capacitance at a predetermined instant after the switching-on of the memory cell and the reference memory cell.

The invention discloses a one-phase digital current / voltage measuring instrument and a measuring method thereof, comprising a power supply connected with all circuits; the measuring instrument is characterized in that: an input circuit is used for collecting input current / voltage numerical value from a microprocessor; a key signal acquisition circuit is used for setting communication band rate and communication address by a toggle switch; a communication interface circuit is used for adopting RS-485 communication mode based on Modbus protocol to receive command data from an upper computer and uploading the collected input current / voltage data to the upper computer by the microprocessor and keeping real-time communication with the upper computer. By adopting the structure and method, the current and the voltage in an electrical circuit are measured and displayed in a real-time manner, and the measured electric quantity data is transmitted remotely by an RS-485 interface. A user can combine the functional modules randomly according to needs, so as to solve the disadvantage that the information can be obtained only by checking the instrument and improve the precision of the measured numerical value; the product performance is stable and reliable, therefore, the instrument is easy to manufacture.

A wire bending device includes a bending head bearing two bending tools between which the wire to be bent is passed. Either tool is alternately capable of being fixed or being a pivot for rotation of the bending head therearound. The device also includes a mechanical device for feeding the wire axially in one direction or another; a mechanical device for rotatably driving the bending tools, in two different directions, about an axis of either bending tool; and a mechanical device for shifting the bending tools in a plane perpendicular to the axis about which the bending tools can rotate. There can be calculating controller for managing simultaneously the operation of the mechanical devices, so that the movements generated by the wire and bending tools are superposed.

The invention discloses a small paper money processing machine and relates to a two-channel paper money counting machine and a sorter used for meeting various paper processing requirements of paper money identification, especially used for counting paper money in the financial system commercial disappearance field and paper such as checks, government bonds and the like similar to the paper money, sorting paper money face value, sorting old and new degree of the paper money, identifying authenticity of the paper money, recognizing paper money number and the like. The small paper money processing machine comprises a base mechanism, an upper mechanism, a back turning mechanism, a detection mechanism, a conveying mechanism, an upper money receiving mechanism, a transmission mechanism and a shell, wherein the base mechanism, the upper mechanism and the back turning mechanism are movably connected through a rotation shaft; the upper mechanism and the base mechanism are located and locked through a left locking hook and a right locking hook; a money distribution mechanism comprises a lower money discharging pinch roller, a lower money discharging wheel, a money distributing stirring fork, a money distributing electromagnetic switch and a money distributing sensor; the lower money receiving mechanism comprises a money receiving wheel, a money receiving motor, a wheel receiving frame, a small motor speed measuring plate, a small motor speed measuring sensor, a lower money receiving baffle, a destaticizing sheet and a money receiving sensor.

The invention discloses a karst area soil nutrient reserve sampling and calculating method. The method comprises the steps that: (1) a dry land is selected at a karst area; (2) the sample land is divided into small samples, and soil augers are firmly drilled into soil in every network; (3) a soil profile stratified sample is dug from every land sample according to soil average thickness, and soil unit weights are determined by using cutting rings; (4) the soil samples are naturally air-dried in a shade, and are filtered; plant roots in soil samples in the cutting rings are removed, washed by using clear water, and bake-dried to constant weight; and the plant roots are weighed, such that root biomasses are obtained; (5) according to a soil organic carbon content and soil unit weight relationship scatter-plot established according to ecosystem soil profile data, organic carbon contents are determined, and soil unit weights are calculated; (6) soil nutrient densities are calculated according to soil volumes; and (7) according to soil nutrient densities of the samples of the ecosystem, unit-area soil nutrient reserve is obtained. The method is simple, easy, convenient, time-saving and labor-saving, and has high operability. With the method, karst area soil nutrient reserve data can be accurately obtained.