350 results about "Active force" patented technology

This invention pertains to processing continuous webs such as paper, film, composites, and the like, in dynamic continuous processing operations. More particularly, it relates to accumulating limited lengths of such continuous webs and to controlling tension in such continuous webs during the processing operation. Both tension control and limited accumulations are achieved in a festoon system by connecting a corresponding festoon to actuator or the like, sensing variables such as position, tension, velocity, and acceleration parameters related to the web and the festoon, and providing active force commands, in response to the sensed variables, to cause translational movement, generally including a target acceleration, in the upper festoon rolls to control tension disturbances in the web while providing limited accumulation of a length of the web. In some applications of the invention, the festoon control system is used to attenuate tension disturbances. In other applications of the invention, the festoon control system is used to create controlled tension disturbances.

The invention discloses a double-motor controller with an electronic differential function. The double-motor controller comprises a main control chip integrated with an electronic differential module, two groups of drive motor control chips, two groups of rotary transformer decoding chips, two groups of power drive modules for controlling a motor to operate, a capacitor bank, an angle decoding and conditioning circuit, two permanent magnet motors with built-in rotary transformers, and an active force battery pack, wherein the main control chip is used for processing a received signal; and a left drive wheel control signal and a right drive wheel control signal are transmitted into the drive motor control chips corresponding to wheels respectively through the operation of an electronic differential operation module. The drive motor control chips receive information of position values, speed values and the like of the drive motor returned by corresponding rotary transformer decoding chips; information provided by the main control chip is combined so as to be processed comprehensively; and a waveform is output to a corresponding power drive module so as to operate the wheels through the drive motor. The double-motor controller with the electronic differential function has the advantages of high drive efficiency, small volume, convenience in arrangement and installation, and capability of active differential.

A touch screen uses one or more force sensors to determine location of the touch on the screen. The force sensor has an accurately determined direction of sensitivity and, therefore, has reduced sensitivity to forces that are non-perpendicular to the screen. The sensor is thin in relation to the area of the active force-sensing element, allowing low profile force touch screens to have a better combination of mechanical integrity, accuracy, sensitivity, and high signal to noise ratio than has heretofore been achieved. The sensor may also be rotationally soft, so that it is effective at preventing twisting motions of the overlay or the support surface from affecting the sensed force.

A method and device for reducing vibratory noise in a system with an integral rotating member includes independently operable drive means for controlling the angular velocity of at least two masses. Control signals manipulate the drive means to allow each mass to rotate at optimal speed, direction and phase for reducing the noise induced in the system by the rotating member.

A mooring system including a body/arm/vessel arrangement with passive damping and/or an active force restoring system. The active force restoring system includes a sensor for generating a displacement signal representative of the displacement of the vessel from a quiescent position and an active forcing device which responds to the displacement signal to force the arm in a direction to move the vessel toward the quiescent position. The passive damping arrangement includes a device, independent of and in addition to the damping of the water on the vessel or the arm, that damps the oscillation of the vessel in response to environmental conditions which force the vessel from its quiescent position. Hydraulic cylinder arrangements are provided for active forcing and passive damping. Powered winch/cable arrangements are also provided for active force systems. Alternative devices for active and passive damping systems of torque actuators include hydraulic powered cans with internal fins, or cans with internal elastomeric elements or disk brake elements.

A gingival retraction material is prepared using fibrillated fibers to improve viscosity and combining taste-modifying agent, color agent, and kaolin filler to form a paste-like structure having the viscosity ranging from 31.0×10⁶ cP to 71.0×10⁶ cP. The gingival material is injectable into the patient's gingival sulcus to provide a physical active force that widens the patient's gingival sulcus by means of the material viscosity and also to control gingival tissue fluid and hemostasis so as to keep the gingival sulcus dry for further mold impressions.

A microfluidic assay device for determining the presence or absence of an analyte within a fluid test sample is provided. The present invention provides a technique for achieving continuous flow in a microfluidic device by using at least one input channel, an analysis zone, and a plurality of wicking channels disposed about the perimeter of the analysis zone. In one embodiment, for example, the wicking channels extend radially from the analysis zone. As a result of the particular configuration of the microfluidic device, an assay may performed in a “single step” without the need for active forces, such as a pressure source, electrokinetic force, etc., to induce flow of the fluid test sample through the device. Likewise, flow rate is controlled so that the dwell time of the fluid test sample within the analysis zone is long enough to allow for the desired reactions and/or detection.

The invention discloses a dynamic control method of a linear steering engine electric loading system, comprising the following steps: modeling a servo loading motor, constructing a torque balance equation, and constructing a linear steering engine mechanism model; building a ball screw pair motion model; analyzing the transfer function of the electric loading system, designing a three-closed-loop control method based on a current inner loop, a position outer loop and a force outer loop, and applying complex vector PI control in the current inner loop to enable the current of the servo loading motor to track instruction signals quickly and accurately; and finally, making feed-forward compensation for angular velocity, and verifying the control method. The method takes an electric loading system driven by a permanent magnet synchronous motor as a specific object, and considers the impact of the characteristics of the linear steering engine and the coupling degree between the linear steering engine and the electric loading system. The active force of active displacement of the linear steering engine is inhibited, and the loading precision of the linear loading system is improved. Moreover, a verification method is put forward, which makes a linear load simulator better evaluated.

The invention provides a control method of a cooking utensil.An upper cover of the cooking utensil is provided with a steam exhaust valve and a coil assembly. The steam exhaust valve is provided with a permanent magnet or a soft magnet and can be affected by active force of a magnetic field generated by electrification of the coil assembly. The control method comprises following steps: a first boiling phase, first pre-set current is input to the coil assembly; a second boiling phase, second pre-set current is input to the coil assembly after the first boiling phase; a pressure maintaining phase, third pre-set current is input to the coil assembly between the first and the second boiling phase or after the second boiling phase.The control method of the cooking utensil has following beneficial effects: due to the fact that different current is input into the coil assembly in different cooking phases, different magnetic field forces can be generated by the steam exhaust valve; the cooking utensil is controlled to be kept in the boiling state in different phases and under different pressure; heat and moisture can be transferred evenly so that thick soup and complete rice can be achieved.

The present invention encompasses the inclusion of non-heat, active-force humidifiers into CPAP devices. These humidifier modules use for example ultrasonics, atomization, and nebulization to increase the relative humidity of the air being delivered to the patient. Humidity is important in CPAP devices because it is vital to patient comfort and optimum health. All of these various, non-heat active humidifier modules are components or attachments to a CPAP device, and all optionally employ various procedures and devices for dealing with excess condensation. Most importantly, these humidification modules avoid the main problems associated with heat-requiring humidifiers, such as the added cost and time needed to operate these humidifiers, the excess condensation produced, and the increased likelihood of microbial growth.

The invention discloses a butt-jointing and welding method of plates. The bases of the grooves of two plates which need to be welded are butt-jointed closely and are fixed in the groove through spot welding. A ceramic pad is stuck at the bottom of the butt-jointing place by an aluminum foil. Two parallel and separated thin welding wires are used to treat welding seam by submerged arc-welding. The butt-jointing and welding method effectively shunts the welding current to the two thin welding wires, not only improves the melting efficiency of the welding wire, but also avoids the excessive concentration of the active force of electric arc, not only has high welding efficiency, but also is easier to achieve a balance state to form the welding seam under the support of surface tension and the ceramic pad.

An access ladder includes a plurality of sections connected together to telescope between an extended position and a retracted position that has an increasing reactive force to counterbalance the weight of the sections as they extend. A method for accessing a room with a ladder connected to a ceiling including the steps of moving the ladder to a fully extended position subject to an increasingly active force to counterbalance the weight of the ladder as it extends. There is the step of retracting the ladder into a retracted position in the ceiling.

The invention relates to a converter gearing, comprising a gear rim (7), which is connected to the pivoting axis (6) of a converter box, said gear rim being engaged with at least one drive pinion (8) of the converter gearing (9) and at least one locking device, which can be pivoted to engage with and be disengaged from the toothed gearing of the gear rim, (7) in the form of a locking arm (12) that is positioned on a horizontal shaft (10) and configured with toothed gearing (11). The aim of the invention is to improve said locking device. To achieve this, the shaft (10) of the locking arm (12) is mounted in at least one terminal bearing (13, 13′) and the locking arm (12) can be engaged with and disengaged from the toothed gearing of the gear rim (7) in a non-positive manner, preferably by means of active force elements (14, 14′) in its end regions. In addition, the shaft (10) of the locking arm (12) is mounted in the housing of the converter gearing (9) by means of two eccentric bushes (4, 5), which rotate freely within one another, at each of its ends. The mounting is configured in such a way, that by the independent rotation of the same, an ideal mutual engagement position of the two interacting toothed gearing regions of the locking device (12) and the gear rim (7) can be set.

Active Force measuring device for measuring a force impact onto a ferromagnetic object comprising a flux concentrator having a first and second ends facing the ferromagnetic object to me measured, a magnetic field generation coil arrangement being wound around the flux concentrator, wherein the magnetic field generating coil arrangement is adapted for generating a magnetic field having a main generating direction between the first end and the second end, and a magnetic field sensing arrangement, wherein the magnetic field sensing arrangement is arranged between the first end and the second end.

The invention relates to an active suspension system for a hydraulic type vehicle and belongs to the technique of vehicle chassis. The suspension system is mainly composed of a closed loop hydraulic system which is formed by serially connecting a hydraulic pump, a throttle valve, a two-position tee solenoid directional valve, a one-way throttle valve, a two-position two-way electromagnetic ball valve, two-position two-way proportional direction valves, a vibration reducing hydraulic cylinder, an overflow valve and an oil tank in turn, wherein the connecting ends of the two-position tee solenoid directional valve and the one-way throttle valve are simultaneously connected with a system oil-supply pressure detecting line; a control unit is respectively connected with an acceleration sensor, a displacement sensor, the two-position tee solenoid directional valve, the two-position two-way electromagnetic ball valve, a two-position two-way proportional direction valve A and a two-position two-way proportional direction valve B through wires. A corresponding active force is generated by the system, so that the active control and the continuous control are realized; the vibration caused by an uneven pavement and increasing/reducing of vehicle weight is relieved; the structure is simple and reasonable; a control device is low in demand on an operation environment; the reliability is high; the manufacturing cost is low; the use cost is low; the hydraulic oil consumption is reduced; the fuel economy is increased.

This invention is rotating blade car type fluid power generator. The chain connects to three groups of rotating blade cars. Rotating blades are evenly distributed on circulate track. Two straight tracks and two half circular arc tracks are connected to form circulating track. Under the effect of fluid, rotating blade of rotating blade car is vertical to fluid flowing direction at the straight segment of track. Thus, fluid active force is strong. At another straight segment, under the effect of fluid, rotating blade of rotating blade car is parallel to fluid flowing direction. Thus, fluid active force is little. The three groups of rotating blade cars and rotating blades undertake circulating operation along track. The chain transfers power to power generator through driving train. The flow power driving train, which is applied underground, is composed of chain pump, pipe, accumulator and water turbine. It makes power generator can be assembled on water surface. The resistance type wind power machine is driven by chain.

Embodiments of the present invention are directed to an apparatus for providing a low spring constant, pneumatic suspension using vacuum for the lens in a projection system. In one embodiment, a pneumatic suspension system for a load comprises a frame; and a body movably disposed in the frame and spaced from a side wall of the frame by a gap to define a chamber in the frame above the body, the body being configured to be connected to the load. The frame includes an outlet to draw a gas from the chamber to lower the pressure in the chamber with respect to an ambient pressure outside the frame. An air bearing is formed in the gap between the body and the side wall of the frame to provide non-contact between the body and the frame. The pressure in the chamber is sufficiently lower than the ambient pressure to produce a lift force to lift the body and the load connected thereto with respect to the frame.

The invention discloses a method for controlling the stability of a vehicle based on vertical load distribution of a tire. The control method comprises the following steps of: 10, giving steering input out by a driver, estimating motion state information and ideal state information of the vehicle by using a finished vehicle model and a finished vehicle reference model, and judging whether the vehicle is positioned in a stable state or not by the comparison of vehicle information; 20, inputting tracking errors of the vehicle into a proportion integration differentiation (PID) controller, and acquiring an active force feedback of a suspension frame by a corresponding PID control algorithm; and 30, after feedback control is received by the vehicle, redistributing a vertical load of the tire of the vehicle to generate calibration yawing moment so as to restrain the sideslip of the vehicle and improve the stability of the vehicle. In the method, the vertical load of the tire is distributed by the active force of the suspension frame; the calibration yawing moment is generated due to a nonlinear coupling relationship between the vertical load of the tire and cornering force; therefore, yawing motion of the vehicle is controlled, the sideslip of the vehicle is restrained, and the lateral stability of the vehicle is improved.

The invention relates to a high power fin cold plate radiator and a manufacturing method thereof. Provided is a high power fin cold plate radiator. The radiator is characterized in that it is formed by merging a plurality of radiation cells; the radiation cells are aluminium or copper extrusion moulding uniform cross section bars; the radiation cells are arranged in the width direction; the substrate portion of each adjacent radiation cells uses a stripe-shaped hook to plug with a corresponding slot and the stripe-shaped hook and the slot abut against each to cooperate with an upward or downward inclined plane; when one of the two adjacent radiation cells is impacted with an active force in an up and down direction, the stripe-shaped hook and the slot oppositely slide along the inclined plane to make the adjacent radiation cells become closer so that a clamp structure among the radiation cells is formed and the substrate portions are welded together with a stirring friction welder. The invention is characterized by simple manufacture. The height of the fin can be increased, the thickness of the fin can be reduced, the spacing between the fins after the radiation cells are merged together can be reduced to achieve the requirement of high power fins and 25-time to 40-time fins can be manufactured.

The invention relates to a ZnO nano wall/RGO heterojunction gas-sensitive sensor and a preparation method thereof. In the prior art, problems of high sensor work temperature and long response-recovery time due to poor contact of ZnO and graphene are existed. According to the invention, combination of vacuum pumping filtration and a thermal reduction method is employed for reducing a graphene film on an Ag interdigital electrode; then a monocrystalline ZnO nano wall is performed with in-situ growth on the surface of the graphene film by using an aqueous solution method; the constructed ZnO nano wall/RGO heterojunction are performed with high temperature heat treatment under Ar atmosphere, and the ZnO nano wall/RGO heterojunction gas-sensitive sensor can be obtained. According to the ZnO nano wall/RGO heterojunction, the ZnO nano wall is performed with in-situ growth on the surface of the RGO film, strong active force connection of a covalent bond or a chemical bond can be realized, the unique advantage of the ZnO nano wall on the high sensitivity detection aspect can be performed, and the electronic transmission rate can be increased by taking graphene as a termination electrode.

The invention relates to an intelligently controlled forced convection radiation LED streetlamp system, which comprises a lamppost, a lamppost cantilever, a high-power LED streetlamp cap, a radiating fin, a radiating fan and an intelligent drive controller. A radiating substrate of a high-power LED is fixed on the radiating fin; the radiating fan is fixed at one end of the radiating fin; the air intake surface of the radiating fan faces an air outlet of the lamppost cantilever; required airflow enters from air inlets on the upper and lower parts of the hollow lamppost; even if the streetlamp is turned on when the temperature of the substrate of the high-power LED is within a set safety range, the fan does not work and heat is radiated by passive natural convection; and when the temperature of the substrate of the high-power LED exceeds a set safety temperature upper limit 60 DEG C, the fan works and adopts active forced radiation. If the radiating fan fails, excessive dust is accumulated on the air passage and the radiating fin, or the temperature of the LED substrate exceeds a set limit failure temperature 80 DEG C, the circuit of the LED lamp is disconnected, and the controller sends an alarm signal for check and maintenance at the same time.