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306results about How to "For precise control" patented technology

Cold-hot compound die molding method for aluminum alloy sheet metal component

ActiveCN102615201ADimensionally stableDimensional change, shape stability can be obtained directly through one-time formingShaping toolsMetalAluminium alloy
The invention discloses a cold-hot compound die molding method for an aluminum alloy sheet metal component, and relates to a molding method for a sheet metal component. The invention aims to solve the technical problems that the conventional hot-state molding method for the aluminum alloy sheet metal component is low in molding efficiency and can easily cause local crinkles and fractures, and provides the cold-hot compound die molding method for the aluminum alloy sheet metal component. The cold-hot compound die molding method comprises the following steps of: 1, heating a lower die to a temperature of between 200 and 900 DEG C; 2, placing an aluminum alloy plate blank on the lower die and heating the aluminum alloy plate blank to the deformation temperature of the aluminum alloy plate blank; 3, closing the die to press the aluminum alloy plate blank into the aluminum alloy sheet metal component; 4, separating the aluminum alloy sheet metal component, an upper die and a blank holder from the lower die; and 5, cooling the upper die and the blank holder, keeping the temperature for a certain period of time, and taking the aluminum alloy sheet metal component down to finish the cold-hot compound die molding of the aluminum alloy sheet metal component. According to the method, a cold-hot compound die in which the upper die is in a cold state and the lower die is in a hot state is adopted to mold the aluminum alloy sheet metal component. The cold-hot compound die molding method is suitable for making the aluminum alloy sheet metal component.
Owner:天津哈工永兴科技有限公司

Precision control system and method for air supply temperature and humidity of combined air handling unit

The invention discloses a precision control system for an air supply temperature and humidity of a combined air handling unit. The system comprises the combined air handling unit, a control module, areturn air temperature and humidity sensor, a CO2 concentration sensor, a fresh air temperature and humidity sensor, an air supply temperature and humidity sensor and an outdoor temperature and humidity sensor. A control method comprises the following steps of a, calculating the cold load Q and the wet load W of an air conditioner area; b, determining the air supply capacity F and the frequency ofan air supplier omega; c, determining the air supply target moisture content ds'; d, determining the mixing ratio and mixing parameters of fresh air and return air; e, determining a control mode; andf, determining a control mode. As the fewer sensors are installed at the position where measurement accuracy can be ensured, the air handling process of the combined air handling unit is accurately calculated according to a controller built-in algorithm, and accurate control over the air supply temperature and humidity of the combined air handling unit and energy-saving running are achieved.
Owner:浙江盾安自控科技有限公司

Horizontal well forced gas drainage method with coal bed gas subjected to staged fracturing

ActiveCN103967472AFor precise controlSolving the Difficulties of Directional DrillingFluid removalSoil scienceDrill
The invention relates to a horizontal well forced gas drainage method with coal bed gas subjected to staged fracturing. In order to solve the problems that hole forming performance of horizontal drilling in a coal bed is poor and buried drill accidents can happen easily and to achieve the forced gas drainage effect on tectonic soft coal, the well track of a horizontal well is controlled in mudstone or sand stone with a certain range above a coal bed top boundary, and the horizontal well is docked with a drainage vertical well at a far end. An ultra deep penetration perforating technology is used, according to the requirement for certain hole density and orientation, orientated perforating is conducted downwards on the horizontal well section in a segmented mode, a steel sleeve, a well cementation cement ring and a mudstone top plate are penetrated, and the horizontal well is communicated with a target coal layer below. Then, a clear water sand carrying fracturing technology is used, staged fracturing is conducted on the target coal bed according to the requirements for large discharge capacity, large liquid amount, high prepad fluid ratio, large sand amount and middle sand ratio, and the purpose of increasing production is achieved.
Owner:XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP

Pressure-tunable plate gradual shaping pressure head and shaping device thereof

InactiveCN101306451AEliminate tangential forceAvoid wrinklesShaping toolsThin shellsEngineering
The invention discloses an incremental forming indenter for sheet material with an adjustable pressure. The indenter comprises a forming indenter cylinder body, wherein a forming motor is fixedly mounted at the upper end of the cylindrical forming indenter cylinder body; a forming ball head is moveably arranged at the lower end of the forming indenter cylinder body via a ball cup, and the forming ball head is provided with an overhang ball cap part which extends out of the lower end of the forming indenter cylinder body; a transmission pair composed of a screw rod and a screw nut, and a pressure sensor are sequentially arranged from top to bottom in an inner cavity of the forming indenter cylinder body, and the pressure sensor is positioned between an upper backing plate and a lower backing plate; the screw rod is connected with an output shaft of the forming motor, and the screw nut is supported on the upper backing plate; and a ball head spring is supported between the lower backing plate and the ball cup. Based on the principle of 'layered manufacture', a thin-shell piece with a required shape is produced by adopting the layered incremental forming, therefore, the indenter is characterized by high machining accuracy, good surface quality, accurate and stable forming, adjustable and controllable pressure, etc., and is widely applicable to the forming processes of various complex curved shapes and various trial-manufacture stamping parts in small amount.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Portable dust preventive lifting platform for UAV (unmanned aerial vehicle) in mountainous region

The invention provides a portable dust preventive lifting platform for a UAV (unmanned aerial vehicle) in a mountainous region. The portable dust preventive lifting platform for the UAV in the mountainous region comprises a platform body, fixing nails, a level, a heightening device, an upper part of a supporting leg, a lower part of a supporting leg, a folding device and a landing mark; the platform body is connected with the upper part of the supporting leg through the folding device; the upper part of the supporting leg is fixedly connected with the lower part of the supporting leg through the heightening device; the upper part of the supporting leg and the lower part of the supporting leg are in threaded connection with the heightening device; threads which are formed in the upper part of the supporting leg to connect the heightening device are in direction opposite to the threads which are formed in the lower part of the supporting leg to connect the heightening device; the lower part of the supporting leg is fixed on the ground through the fixing nails; the landing mark is arranged on the platform body; the level is mounted on the platform body; when the UAV performs aerial photographing for the mountainous region, a lifting platform can be built for the UAV, so that the UAV can safely land and dust caused by the UAV landing and taking off can be avoided, and as a result, the double-protection effect for the UAV is achieved; an operator of the UAV can conveniently accurately operate and control the UAV to land; the platform can be folded and is convenient to carry.
Owner:MAINTENANCE BRANCH STATE GRID LIAONING ELECTRIC POWER +2

Switching controlling method in mobile communication system and wireless network controller

The invention provides a switching controlling method in a mobile communication system and a wireless network controller. The method comprises the following steps of: (A) determining a measurement quantity needed to be measured and a switching measurement control parameter under the current terminal measurement managing state by the wireless network controller according to the corresponding relation of a preset terminal measurement management status, the measurement quantity needed to be measured and the switching measurement control parameter; (B) issuing a measurement control message to a mobile terminal and/or a base station by the wireless network controller, wherein the measurement control message includes the determined measurement quantity needed to be measured; (C) receiving measurement data which are measured and reported by the mobile terminal and/or the base station according to the measurement quantity needed to be measured, included in the measurement control messageby the wireless network controller; and (D) triggering cell switching by the wireless network controller when the measurement data meet a switching judgment condition confirmed by the switching measurement control parameter. By adopting the technical scheme, more accurate switching control can be realized, and thus the network quality is improved.
Owner:CHINA MOBILE GRP BEIJING

Clamping rotary cutting type underactuated two-finger grape picking device

ActiveCN106342484AWith envelope grabbing functionImprove stabilityPicking devicesCircular discClosed loop
The invention provides a clamping rotary cutting type underactuated two-finger grape picking device, which mainly comprises underactuated finger mechanisms, a rotation mechanism, a pushing mechanism, a rotary cutting mechanism, a wrist connecting mechanism, a main support plate and a binocular camera, wherein the underactuated finger mechanisms are distributed at two sides of the main support plate; the wrist connecting mechanism is connected with the rotation mechanism; the rotation mechanism is connected with the main support plate; the pushing mechanism is connected with the rotation mechanism; the rotary cutting mechanism is connected with the pushing mechanism; the wrist connecting mechanism is connected with the waist of a mechanical arm; a motor A drives the underactuated finger mechanisms to move; through the effects of an S-shaped pressure sensor, a potentiometer, a flat plate pressure sensor and a tension spring, the flexible target object gripping and the closed loop real-time control on the underactuated finger mechanisms by a controller are realized; the rotary cutting mechanism controls a circular disc cutter blade to realize rotary cutting action on target fruit stems through a direct current motor. The grape picking device has the advantages that the structure is ingenious; the flexibility is high; the finger pose work space is large; high picking success rate can be obtained; the mechanical damage to plants and fruits can be reduced; the picking on clustered fruits such as grapes can be realized; the characteristics of self-adaption capability to the fruit shape and contact force controllability are realized.
Owner:JIANGSU UNIV

Air conditioner indoor environment temperature and humidity compensation method

The invention discloses an air conditioner indoor environment temperature and humidity compensation method. The method comprises the steps that an air conditioner controller is powered on to run, and the controller temperature and the indoor unit temperature are obtained; whether the difference value of the controller temperature and the indoor unit temperature is smaller than a set difference value or not is judged; if yes, the first compensation temperature is determined according to the controller powered-on running time, and the difference of the current controller temperature and the first compensation temperature is calculated as the indoor environment temperature; if not, whether the controller powered-on running time is smaller than a set time threshold value or not is judged; if yes, the current indoor unit temperature is obtained as the indoor environment temperature; and if not, the difference of the current controller temperature and the second compensation temperature is calculated as the indoor environment temperature. According to the air conditioner indoor environment temperature and humidity compensation method, by means of compensation for the temperature and the humidity, the accuracy of the obtained indoor environment temperature and indoor environment humidity is improved, so that an air conditioner is accurately controlled, user experience is improved, and the market competitiveness of the air conditioner is improved.
Owner:QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD

Indoor parking stall accurate guidance system and method based on WiFi

The present invention discloses an indoor parking stall accurate guidance system and method based on the WiFi. The system concretely comprises three parts consisting of an outdoor navigation module, an indoor parking stall accurate guidance module and a reverse vehicle tracking module. The outdoor navigation module is achieved mainly based on development of an outdoor parking guidance subsystem and a mobile communication terminal by employing a third-party platform, and a personal reputation evaluation system is added in the system; and the indoor parking stall accurate guidance module and thereverse vehicle tracking module achieve indoor parking stall accurate guidance of a vehicle and reverse vehicle tracking guidance of a user indoor parking stall by mainly employing WIFI location, a route guidance subsystem, an ultrasonic wave-indicating lamp-parking lock integration subsystem, the mobile communication terminal and a server. The indoor parking stall accurate guidance system and method based on the WiFi combine outdoor navigation and indoor parking stall accurate guidance, and therefore, the management level of parking facilities is improved and full utilization of parking resources is promoted to facilitate alleviate road traffic congestion.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY

Preparation method of hollow micro-channel structure

The invention discloses a preparation method of a hollow micro-channel structure, and specifically relates to the field of micro machining. The method comprises the following steps: making a micron-sized micro-channel master mask by a photoetching technology and a hot reflux technology; making a PDMS (Polydimethylsiloxane) flexible template by using the master mask, wherein the obtained flexible substrate has a pattern structure complementary to the micro-channel master mask; tightly attaching the PDMS flexible template to the surface of a chip to form a micro-channel cavity; dripping S1813 photoresist on one side; filling the micro-channel cavity with the photoresist under the action of capillary force; heating after filling for a long time, wherein the photoresist in the micro-channel cavity reflows, so that the photoresist in contact with an inner wall of the micro-channel cavity is attached to the inner wall; cooling, curing and removing the PDMS flexible template to obtain the hollow micro-channel structure on the surface of the chip. Compared with other methods for preparing a hollow micro-channel, the preparation method disclosed by the invention has the advantages of low cost, simple process and the like. The preparation method is suitable for the application fields of micro machining, micro-fluidic chips, biomedicine and the like.
Owner:LUDONG UNIVERSITY

Fuel gas concentration self-adaptive control method for fuel gas generating set

The invention discloses a fuel gas concentration self-adaptive control method for a fuel gas generating set. The fuel gas concentration is the concentration of methane in fuel gas. The method comprises an open-loop fuel gas concentration self-learning starting control step carried out when the fuel gas generating set is not successfully started, wherein an engine ECU performs internal logic fuel gas concentration self-learning to reach the changed fuel gas concentration value, so that the set can be started smoothly; and the method further comprises a closed-loop fuel gas concentration self-learning control step, wherein the engine ECU continuously and finely adjusts the fuel gas methane concentration value repeatedly according to closed-loop data of an oxygen sensor, and finally performsaccurate self-learning to reach the changed fuel gas methane concentration value so that the fuel gas generating set can easily respond to the change of the concentration of the methane in the fuel gas. According to the method, the fuel gas generator set can accurately control the injection amount of a fuel gas valve and the air-fuel ratio better under the condition of fuel gas such as biogas, gasand biomass gas with the methane concentration variable, so that safe and stable operation is realized.
Owner:WEICHAI XIGANG NEW ENERGY POWER

Engineering project intelligent dynamic safety supervision system based on BIM

ActiveCN111507595AImprove the intelligent level of safety risk managementRealize unified managementCharacter and pattern recognitionOffice automationControl systemMarking out
The invention provides an engineering project intelligent dynamic safety supervision system based on BIM, and the system comprises: a model building module which is used for building an engineering project BIM model according to the basic information of an engineering project; a project management and control module which is used for associating the construction progress of the engineering projectwith an engineering project BIM model to form an engineering project 4D BIM model; a safety analysis module which is used for analyzing dangerous large projects in the engineering project 4D BIM model according to the engineering project 4D BIM model and marking corresponding dangerous large project information in the engineering project 4D BIM model; and a safety supervision module which is usedfor monitoring the on-site construction process of the dangerous large project, acquiring on-site safety management information, and performing safety risk assessment and safety risk management according to the on-site safety management information. The intelligent dynamic safety management and control system is helpful for acquiring basic information of a project, analyzing dangerous large projects in the project by combining with the support of a database, and carrying out key safety supervision, analysis and management and control on the dangerous large projects, so that the efficiency ofengineering project safety supervision is improved.
Owner:广州高新工程顾问有限公司

Robot-assisted puncture operation end tool center calibration method based on stereoscopic vision

The invention discloses a robot-assisted puncture operation end tool center calibration method based on stereoscopic vision, which belongs to the field of robot control, and aims to realize accurate control of a robot on a needle tip. The method comprises the following steps: performing monocular vision calibration on two cameras, performing binocular system vision calibration, and establishing avision measurement space coordinate system; wherein a puncture needle performs single translational motion and rotary translational motion respectively in a visual measurement space range; processingan image acquired in the moving operation to generate a closed area and a minimum enclosing rectangle of the closed area; circularly detecting an intersection point of the short edge of the minimum enclosing rectangle and the closed area, and obtaining the position change description of a needle tip in the visual measurement space coordinate system in the single translational motion process and the position change description of the needle tip in the visual measurement space coordinate system in the rotary translational motion process; obtaining an attitude rotation relationship between the visual measurement space coordinate system and a robot base coordinate system; obtaining position description of the needle tip relative to the tail end of the mechanical arm, and completing position calibration of the needle tip.
Owner:HARBIN INST OF TECH
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