15643results about How to "Reduce shock" patented technology

A wafer transfer blade including a body including metal oxide and configured to support a wafer, and an adsorbing part on the body, the adsorbing part having at least one therein and configured to apply vacuum pressure to attach the wafer on the body may be provided. The body may include metal oxide to prevent static electricity.

A lancet comprises a slider having a puncture needle holding mechanism at its one end; a cam ring which has a continuous cam groove, is rotatable about a support shaft, and has a cam ring claw and an anti-return claw for restricting the rotation; a ring spring for applying a force to rotate the cam ring; a rotatable stopper arm for holding and releasing the rotation of the cam ring; and a rotatable ratchet for restricting the direction of rotation of the cam ring. A puncture needle unit comprises a puncture needle body which is integrally molded with a protrusion to be fitted to the lancet, a rotation stop rib, and a puncture needle; and a puncture needle cap which is lightly pressed into the puncture needle body.

A multi-piece disc replacement implant device for replacing a disc removed by a discectomy including an upper plate member, a lower plate member, and an intermediate resilient member providing movement between the two plate members replicating the natural movement of the spine including flexion / extension, lateral bending, and, in some embodiments, rotation. The plate members are rigid and have orthogonal sidewalls forming an enclosure. The resilient member is an elastic solid or a multi-chamber balloon structure of fluid-filled sacks that collectively define a non-uniform shape such as an oblate spheroid, or a helically coiled string of beads. Such an implant is capable of supporting the compressive and cyclic loads required of a natural disc. The upper and lower plate members are cooperatively formed to selectively limit the allowable range of motion in any given direction. Alternate embodiments of the invention may be employed in conjunction with removal of the nucleus pulposus when removal of the annulus fibrosus (annulotomy) is not required or desirable.

The invention relates to a wind farm grid-connected coordination control method, and belongs to the technical field of wind farm grid-connected coordination control. The coordination control of the wind farm is acquisition of single equipment information, analysis of the acquired information by the wind farm and information application of power grid scheduling. According to a fan, wind farm and power grid three-level joint coordination framework, the function and the mutual coordination relationship of each level and each link is completely realized, so the whole wind farm has the running andcontrol characteristics of the traditional power station for the power grid, reduces the impact and influence on the power grid and even provides necessary support for the frequency modulation, voltage regulation and the like of the power grid. At the global and micro angle, under the support of the modern communication and analysis and computation technical capacities, the defects and adverse impacts of a fan individual are eliminated or reduced by utilizing horizontal whole and vertical whole joint coordination and mutual support, so the whole wind farm has the power grid-friendly characteristic, the grid-connected running time of the wind farm is prolonged and the economic benefit is greatly improved.

A head and neck protection system includes a head protector, a shoulder protector, and a neck guard for protecting an athlete from injury. The neck guard detachably connects between the head protector and the shoulder protector and includes a collar. The collar has a first edge and a second edge spaced apart from the first edge and longer than the first edge. The first and second edges include fasteners for detachably coupling the collar between the head protector and the shoulder protector. The collar has a perimeter that flares radially outwardly as the collar extends from the head protector to the shoulder protector. The collar interconnects the head protector with the shoulder protector to form a restraint that limits displacement of the head protector relative to the shoulder protector.

The invention discloses acceleration and deceleration controlling means used in numerical control machine, the concept of 'add-acceleration' is introduced against the dynamic property of the controlled member, the add-acceleration is constant in stage of acceleration and deceleration, the two physical quantities of acceleration and add-acceleration are setting; the segmented handling method of add-accelerating sections, uniform accelerating sections, decelerated accelerating sections, uniform speed sections, add-decelerating sections, uniformly-retarded sections and decelerated deceleration sections is adopted, after the interval discrimination, the real-time interpolating calculation in every interval is exceeded based on the integral relation between the add-acceleration, acceleration, speed and displacement, the S type velocity curve is formed to realize the flexible acceleration and deceleration control; the destination discrimination process is proceeded before the interpolating calculation can increase the machining precision of the acceleration and deceleration control. The method is simple, the impact is small, the speed is smooth, the machining precision is high and the flexible control can be realized.

The invention relates to the field of exercise equipment, in particular to an intelligent running machine. The intelligent running machine comprises a running machine body, a tablet personal computer which is arranged on the running machine body, a flexible array pressure sensor which is arranged on the running machine body, a control module which is arranged on the tablet personal computer, a data acquisition module and a motor drive module. An internet function is integrated in the control module of the running machine, and each running machine uploads a relationship model and a training program which are established according to individual characteristics through network to a server for storage so as to realize identity authentication. Multiple kinds of training modes and virtual scenes are integrated in the control module; the training program which meets an exerciser is customized in a personalized way; foot pressure distribution information of the exerciser, which is detected bythe flexible array pressure sensor, and the real-time heart rate which is sent by a heart rate monitoring module are received in real time; running speed, gradient and the like can be adjusted automatically; safety of the exerciser can be guaranteed; and training modes can be enriched and training efficiency can be improved.

The invention discloses a lower limb exoskeleton rehabilitation robot in the technical field of medical equipment. The lower limb exoskeleton rehabilitation robot comprises an ankle joint motion module, a knee joint motion module, a hip joint motion module, a hip and support module and a crutch module, wherein one end of the knee joint motion module is connected with the ankle joint motion module, and the other end of the knee joint motion module is connected with the hip joint motion module; the hip and support module is connected with the hip joint motion module; and the crutch module is independent of an exoskeleton body. The lower limb exoskeleton rehabilitation robot can help patients who suffer from paraplegia stand up and walk, and the bend and stretch motion of a knee joint and a hip joint is controlled by collecting contact information of a crutch and the ground so as to help the patients to stride; and an oppositely-pulled spring of the knee joint can help to reduce impact from the ground, so that patients can walk comfortably, and the efficiency of rehabilitation training is improved.

The present invention provides an S-shaped acceleration and deceleration control method for changing speed and position of an object on line. The method comprises the acceleration phase speed planning, the deceleration phase speed planning, the constant speed phase speed planning, the real speed reduction point predication, the maximum speed processing, the surplus distance compensation, the online object speed changing algorithm and the online object position changing algorithm. An acceleration and deceleration discretization speed planning method is employed and the user input parameters are combined to calculate the operation time of a seven-phase speed planning phase. It is determined whether the maximum acceleration and the maximum speed can reach the criterion or not, the integration problem of a sampling period Ts according to the acceleration / deceleration acceleration, the acceleration / deceleration speed and the final position L after discretization is considered, and the real reachable acceleration / deceleration acceleration, the acceleration / deceleration speed and the feed rate are corrected. The S-shaped acceleration and deceleration control method for changing speed and position of the object on line greatly simplifies an original calculation formula and saves lots of operation time of a computer, and the surplus distance employs a one-time compensation method in the speed reduction process.

The power unit includes H bridge inverter circuit, capacitance in DC section connected to DC bus in inverter circuit, and control circuit for controlling operation of the power unit. The power unit also includes a clipping energy consumption circuit. Combining a small quantity of active power absorbed by active electric power filter, the method realizes controlling DC bus voltage of power unit. The active electric power filter includes following parts: inverter with each phase including at least one power unit; voltage detection circuit, central control system, filtering circuit, precharge circuit, income line switch, interface and communication circuit, and cooling unit etc.

In a vehicular power transmitting apparatus provided with an electrically-controlled differential portion in which controlling an operating state of an electric motor controls a differential state of a differential mechanism, a control device for starting up a drive force source in an appropriate mode depending on a vehicle condition can be provided. The control device includes drive-force source start control means 86 for switching start modes of an engine 8 depending on a vehicle condition to achieve an appropriate start mode for the engine 8 depending on the vehicle condition, so that for instance a contracted drive range by a second electric motor can be avoided.

The invention relates to a control system of a flexible wind power DC convertor on the sea, which pertains to the technical field of power transmission in wind power generation and comprises the doubly closed loop control structure of a sending end rectifier on the sea and the doubly closed loop control structure of a receiving end inverter on the coast; the doubly closed loop control structure of the sending end rectifier on the sea is used for controlling the active power of a flexible DC transmission system and the voltage stability of a wind power AC system; the doubly closed loop control structure of the receiving end inverter on the coast is used for controlling the constant voltage of the DC side of a receiving end convertor and the dynamic regulation of the reactive power of the main network accessing end of the receiving end convertor; two control structures are mutually independent and no data communication exists between the two control structures. The control system can fast and correctly control the active power of wind power transmission on the sea as well as promote the stability of the wind power AC system on the sea and the transmission efficiency and the power quality of the whole DC transmission system.

Embodiments of the present invention provide methods and apparatus for reducing kinetic energy of a plunger within a plunger lift system. In one aspect, a lubricator is provided at a surface of a wellbore, the lubricator having a sealed, pressurized chamber therein to cushion the plunger upon impact. In another aspect, a method is provided for reducing the kinetic energy of the plunger by providing a compressed gas chamber within a lubricator, moving a kinetic energy-reducing surface which is partially bounding the chamber, and compressing the gas within the chamber to reduce kinetic energy of the plunger and cushion the impact force of the plunger.

The invention relates to an efficient mining method for a thick metal ore body in slanting, comprising the following mining steps: constructing a transportation roadway outside a dike, constructing flat roadways for rock drilling by sections, constructing a cutting roadway, constructing a cutting well, constructing a cutting groove and reserving a temporary triangular ore pillar, constructing a trench, constructing a sector medium-deep hole and implementing blasting and ore removal, and recovering residual ore. The method realizes safe and efficient recovering of metal ore bodies with the inclination of 30 to 55 degrees and the average thickness of 4 to 15m by adopting a medium-deep hole blasting ore dropping valve under the circumstance without a filling condition, thereby further improving the mining recovery rate and the mining efficiency.

An electric power tool includes a housing, a motor arranged within the housing, a power transmission unit arranged within the housing for transferring rotation of the motor to a work tool, a motor control unit arranged within the housing for controlling the rotation of the motor, and a trigger switch retractably provided to the housing for instructing the motor control unit to control the rotation of the motor. The electric power tool further includes a wireless communication device arranged within the housing for wirelessly communicating the work information on the content of works. The wireless communication device includes an antenna unit. The wireless communication device is covered with a shock-absorbing material. The antenna unit is arranged to lie higher than the trigger switch when the electric power tool is stored in a specified storage state.

The invention discloses an active power control method of master station-end wind power field subject to wind power grid integration for a large-scale wind power integrated network, and belongs to the technical field of power systems. The method comprises the following steps of: providing a regional power grid active scheduling framework containing wind power field control, predicting newly increased functional short and ultra-short wind power by adopting the control principle of wind power-based predicted ''generating plan tracking'' serving as a main aspect and wind power unit ''direct frequency modulation participation'' serving as a secondary aspect, and describing auxiliary frequency modulation; providing data flow design of an active scheduling system containing wind power field control; providing a wind power field active power control mode to improve the wind power receiving capacity of the power grid by wind power participating power grid active control based on the current wind power control technology; and providing stable section-based wind power field active power control so as to further solve the wind power consume problem under high wind power permeability rate by using the renewable energy source such as maximum dissipated wind power and the like as principle on the premise of ensuring that the wind power of the system is connected to the important section stability margin.

The invention relates to a motion track planning method in an operation space of a heavy-duty industrial robot, which relates to a planning method of a robot motion track. In order to solve the problem of discontinuous acceleration at the start point and end point of the multi-point spline in space in the existing heavy-duty robot motion planning method, the present invention does not realize the smoothness of the motion command; and the existing heavy-duty robot motion planning does not realize the optimal time , the best compromise between the optimal energy consumption. Technical points: This method corrects the traditional cubic spline through additional items. Make it keep continuous in speed and acceleration in the whole process. At the same time, comprehensively considering the optimal problem of time and energy consumption, based on the dynamic model, the energy consumption and execution time of the system are selected as the optimization target, and the speed, torque, and jerk are used as the constraint conditions. A multi-objective optimization model is established, and the NSGA2 non-dominated genetic algorithm is used for Optimize the model solution. It is suitable for off-line calculation processes such as trajectory planning and motion planning of heavy-duty industrial robots.

The invention discloses a cooperative control method for participating in the frequency modulation and pressure regulation of a power system by a wind storage cluster. The method comprises the following steps: using the over-speed control and pitch angle control of a wind turbine generator to preserve a part of active power and reactive power for the wind storage cluster as the frequency modulation and pressure regulation standby power of the power system in accordance with the active power and reactive power capacity standby requirements given by the operation condition of a wind power plant, wind speed and the scheduling of the power system; determining the size of the active power and reactive power given by the wind storage cluster in accordance with the state of the wind storage cluster when the frequency or voltage of the power system is fluctuated; and finally, by reference to the capacity limitation of a wind turbine generator and stored energy, determining the final output condition of the wind turbine generator and the stored energy. According to the cooperative control method provided by the invention, the condition that the wind storage cluster participates in the system frequency and voltage regulation, and the stability and electric energy quality of the power system can be effectively improved by less energy storage capacity allocation in the power system with higher wind power permeability.

This invention relates to an air circulating, shock absorbing shoes which reduce the impact exerted to the feet of the wearer by providing ventilation in the shoes, resulting in pleasant and comfortable wearing of shoes.The air circulating and shock absorbing shoes are technically characterized by being constituted with a buffering space (11) formed on top of the said outsole (10) containing cushion member (40); multiple nuts (50) penetrating the front and rear parts of the said buffering space (11); multiple insertion holes (41) vertically penetrating the said cushion member (40) facing said nuts (50); buffering device inserted in said insertion holes (41) embedded with vertical spring (61); cap screws (70) jointed with said nuts (50); multiple wavy grooves (42)(43) formed at the front and rear parts of said cushion member (40) and connected with grooves (42a)(43a); path (44) which connects said front and rear wavy grooves (42)(43); 1st and 2nd check valves (80)(90) formed at the said path (44) and rear part of the outsole (10) respectively; and multiple suction holes (21)(31) formed at the front part of the said midsole (20) and insole (30) and connected with the front wavy groove (42).

The invention discloses a drive control method for an all-electric car. The drive control method aim at solving the problems that division of working modes during a finished automobile driving running is not considered, a torque compensation function is not considered in the running process of other vehicles except flooring of an accelerator pedal, and united efficiency of a power component is not considered in goal torque setting. The drive control method for the all-electric car comprises the steps of utilizing a finished automobile controller to automatically identify a finished automobile working mode according to current finished automobile acceleration mean values and an acceleration mean square errors, and enabling the finished automobile working mode to be one of a common mode, a power mode and an economic mode; working out an expected torque Treq under the corresponding mode according to a goal working mode control strategy in the finished automobile controller after the working mode identification is finished; restraining and correcting the expected torque Treq according to a power limiting value strategy in the finished automobile controller after the expected torque Treq under the goal working mode is obtained, and if a finished automobile has no major failure at the time, outputting ultimate goal torque commands to a motor.

The invention provides a speed change pressure flow field control method applicable to an intermittent transonic speed wind tunnel, and relates to the technical field of aerospace industry wind tunnel tests. The speed change pressure flow field control method applicable to the intermittent transonic speed wind tunnel solves the problem that a traditional flow field control method can not meet the requirements of flutter tests. The technical scheme includes: enabling total pressure and main ejector pressure to rise to first stage set value in a given rate after a wind tunnel starts ramming; controlling a mach number to reach set target value in a flow field regulating procedure; controlling a main pressure regulating valve and a main air discharge valve so as to enable the total pressure of the wind tunnel and the main ejector pressure to reach respective target value in a change total pressure regulating procedure; and controlling the current main ejector pressure to gradually drop to set shutdown main ejector pressure and controlling the current wind tunnel total pressure to gradually drop to set wind tunnel total pressure value when the wind tunnel is shut down. The speed change pressure flow field control method applicable to the intermittent transonic speed wind tunnel can meet the requirements of the flutter tests for intermittent transonic speed wind tunnel flow field control, has rapid, accurate and reliable test effects, and furthermore is high in total pressure control and mach number control accuracy.

The invention relates to a protection method of a DC electricity transmission high-voltage convertor station, which is used for protection of the DC electricity transmission high-voltage convertor station in the field of electricity transmission and transformation and divides the defects existing in a high-voltage convertor station into three levels of a convertor station system level, a convertor device level and a unit convertor level to design. When a DC electricity transmission system generates the defects, the system sorts and transfers the defects by a defect library, grades the defects according to different defect sorts, carries out corresponding processing and carries out corresponding alarm and action. The protection method can carry out grading comprehensive protection for the high-voltage convertor station. When the defects occur, the system can rapidly query the types of the defects and then carry out corresponding judgment and action for the defects according to the system protection levels, so the protection method reliably and effectively protects the DC electricity transmission system and can minimize the shock impact of the transient disturbance of the high-voltage convertor station on the DC electricity transmission system.

The invention discloses a device, a system and a method for garage recovery. The method comprises the steps of collecting the running information of a system and application software, and determining whether to trigger garage recover according to the received data and preset judgment strategy; outputting a trigger massage if a trigger is needed; and triggering to execute garage recovery according to the trigger massage received by an execution device. The embodiment of the invention can provide self-protection according to predictable garage recovery time points, such that the system reduces system impact when executing garage recovery, and the data integrity is guaranteed; the system can control the execution of garage recovery during system idle period and small throughput period, thus reducing the system block caused by garage recovery; the system can recovery garage regularly, the execution duration is predictable, therefore, the execution time points, frequency and duration of garage recovery can be adjusted on the basis of different systems in order to reduce system cost.

The invention relates to a multi-time-scale power system robustness scheduling system design method. The method includes: dividing a scheduling frame into three time scales: a day-ahead plan, a within-day rolling plan, and a real-time plan, and building a scheduling system; drawing the day-ahead plan based on next-day load prediction data and short-term prediction data of new energy on the basis of a known set initial state, a tie-line exchange plan, and the switch state of the day; drawing the within-day rolling plan based on ultra-short-term load prediction and ultra-short-term new energy power prediction with higher prediction precision on the basis of the day-ahead plan; and drawing the real-time plan based on the within-day rolling scheduling, and further correcting deviation of the scheduling plan and a predicted result. The method is advantageous in that the scheduling mode with multiple time scales is employed to gradually reduce the impact on the power grid by the uncertainty of the new energy, the robustness scheduling mode is employed in the day-ahead plan and the within-day rolling plan, and the robustness of the scheduling scheme is high.