402results about How to "Accurate limit" patented technology

A power factor correction circuit for a boost power supply, wherein the boost power supply includes a boost converter responsive to a rectified AC line voltage. According to one embodiment, the power factor correction circuit includes a voltage feedback amplifier having a first input terminal responsive to an output voltage of the boost converter, a switching multiplier circuit having a first input terminal connected to an output terminal of the voltage feedback amplifier and a second input terminal responsive to the rectified AC line voltage, a current feedback amplifier having a first input terminal connected to an output terminal of the switching multiplier circuit and having a second input terminal responsive to an input current of the boost converter, and a pulse width modulator control circuit having an input terminal connected to an output terminal of the current feedback amplifier and having an output terminal for connection to a pulse width modulated switch of the boost converter.

A mass spectrometer is disclosed wherein the experimentally determined mass to charge ratios of ions are reported together with an error band for each mass to charge ratio determination. The error band may, for example, reflect a 95% probability or confidence that the real, true, actual or accepted mass to charge ratio of the ion lies within the error band. By accurately determining the error band the possible candidate ions in a database can be accurately restricted whilst also guarding against over restriction.

A setting unit 33 configured to set a first landing permissible region in order to ground a free leg side foot 16 within an upper tread surface or a lower tread surface of a step existing ahead of a legged mobile robot 1 in a traveling direction, and a setting unit 34 configured to set a second landing permissible region in order to ground the free leg side foot 16 on an edge of the upper tread surface or the lower tread surface are provided to switch landing permissible regions for movement control of the robot 1 according to a step height.

A structure for informing a state of the ink tank by a light emitting section such as LED, capable of displaying such information at a position easily visible by the user and favorably sending the emitted light both to the user and a light receiver section on the printer side without needing electric wiring which may disturb the user's visibility or manipulation. The light emitting section is separated from the display section and a light guiding section is provided between the both. A member for suitably limiting the emission of light is provided in the display section. Thereby, it is possible to dispose the display section at the best position without needing the electric wiring on the ink tank and obtain a preferable light volume suitable both for the improvement in user's visibility and the stability of the operation of the light receiving section.

The present invention has an object to provide a LED package having a means capable of precisely limiting a region in which a resin containing a phosphor is dotted on a member on which an LED chip is supported. To this end, an LED package according to the present invention comprises a package body having an inner space with an LED chip mounted therein, the inner space being open toward a light emission direction; a chip support member mounted to the inner space of the package body to support the LED chip; a phosphor resin member formed by dotting resin containing a phosphor onto the LED chip; and a region limitation means provided on the chip support member and defining a region in which the phosphor resin member is formed.

A method for joining a first and a second component, at least one of which comprises a fibre-reinforced plastics material. The components are arranged in relation to one another in such a way that a gap region remains between the first and the second component. The gap region is filled, at least in portions, with an uncured plastics material filler in which nanoparticles are dispersed. Energy is introduced locally into the nanoparticles in order to cure the plastics material filler. In another aspect, the invention provides a device for joining two components.

The invention relates to the technical field of an electric appliance, in particular to a cover closing structure of a household appliance. The cover closing structure comprises a support ring, a face cover and a position limiting guide mechanism, wherein the face cover can be buckled with the support ring; the position limiting guide mechanism is used for performing guiding and position limitation on the buckling of the face cover and the support ring. The cover closing structure of the household appliance provided by the invention has the advantages that through the arrangement of the position limiting guide mechanism used for performing the guiding and position limitation on the buckling of the face cover and the support ring, when the face cover and the support ring are buckled, the position limitation on the position of the face cover is realized; the deviation of the face cover in the buckling process is prevented; an accurate guiding effect can be achieved even when a user closes the cover through pressing the side part of the face cover, so that the face cover and the support ring can be accurately buckled; the normal use of the household appliance with the cover closing structure is ensured. The invention also relates to an electric rice cooker or an electric pressure cooker and the household appliance.

The invention discloses a harmonic elimination protector for an electromagnetic potential transformer (PT) of a three-phase electric network. The harmonic elimination protector comprises a resistor, particularly the resistor is connected in parallel with a resettable fuse (PPTC) to form the harmonic elimination protector (PTK) which is connected in series between a neutral point on the primary side of a three-phase electromagnetic PT and the ground so as to prevent ferromagnetic resonance overvoltage, wherein the PPTC is an REG-series product of American reychem Company; and the resistor is a linear resistor (R) or a nonlinear resistor (FR). The harmonic elimination protector can effectively eliminate ferromagnetic resonance caused by the use of the electromagnetic PT in an electric system, prevents generated overvoltage from damaging various types of equipment in the system, does not affect the normal operation of other protective devices in the electric system, has the advantages of simple structure, convenience of use and low manufacturing and using costs and can be widely applied to an electric system with the electromagnetic PT in a 3-35 kV three-phase electric network.

An electric vehicle includes a slip ratio estimator that estimates a slip ratio based on rotational frequencies of respective driven and drive wheels. The vehicle also includes a disturbance observer that determines an estimate of a torque attributable to external force. The vehicle also includes an estimator that may estimate an entire torque to the drive wheel, based on a motor torque command value and the estimate of torque. The vehicle also includes an estimator that estimates a coefficient of friction between a road surface and a tire, based on the entire torque and the slip ratio. The vehicle also includes a determiner that determines a maximum acceptable torque Tmax, based on the coefficient of friction and a vertical load component. Torque limitation is performed such that the motor torque command value does not exceed the maximum acceptable torque Tmax.

The invention discloses a method for assembling frame assemblies. The method includes defining a rectangular assembling region and arranging corners near each right angle of the assembling region; placing a left frame, a right frame, a front frame and a rear frame on the periphery of the assembling region; allowing the heights of the frames and the corners to meet assembling requirements, synchronously shifting the left frame rightwards, the right frame leftwards, the front frame rearwards and the rear frame forwards, allowing 45-degree matched surfaces at two ends of each frame to be in contact with corresponding right angle plates of the corresponding corner in shifting procedures of the various frames, then extending the corresponding right angle plates into ports of two ends of each insertion hole of the corresponding frame, then driving the corners to move towards the center of the assembling region when the various frames continue to be shifted, and completely inserting the right angle plates of the corners into the holes of the corresponding frames when the 45-degree matched surfaces of the adjacent frames are in contact with one another so as to completely assemble each frame assembly. The corresponding complementary 45-degree matched surfaces are arranged at the two ends of each frame. The method has the advantages that the four frames and the corners can be assembled by the aid of the method at one step, and accordingly the assembling efficiency can be improved.

The present invention is an informational display that utilizes cognitive science in the appearance and geographical location of a plurality of gauges and indicators located within the display. Through the use of color, size, depth, location and appearance, information transmitted to an operator through the present invention is rapidly perceived and interpreted. Such rapid interpretation of information by the present invention allows an operator to use a vehicle or the like in a more safe and lawful manner than that of traditional dashboard displays.

The invention discloses a construction process of a large-span steel tube arch bridge without supports. The constructed large-span steel tube arch bridge is a tied-arch bridge erected on a river channel. A bridge upper structure of the tied-arch bridge comprises arch ribs and tie bars connected between every two arch pins of the arch ribs. Rigid frameworks are arranged in the tie bars. The construction process includes the following steps of firstly, splicing the single-piece arch ribs and the rigid frameworks of the tie rods on the land, wherein arch-shaped steel tube supports of the arch ribs and the rigid frameworks are spliced on a splicing field on a bank side of the river channel; secondly, hoisting the single-piece arch ribs and the rigid frameworks of the tie rods together and placing the arch ribs and the rigid frameworks in place; thirdly, constructing the arch ribs through concrete, wherein the arch pins and end beams are constructed, and concrete is symmetrically pressed and poured for the arch ribs; fourthly, conducting pouring through a tie rod concrete suspended form method; fifthly, installing middle beams. The construction process is simple in process step, reasonable in design, convenient to construct and good in construction effect; the construction process of the large-span steel tube arch bridge without supports can be easily, conveniently and rapidly completed without greatly influencing the navigation of the river channel.

The invention discloses an operating mechanism used for a three-station switch. The operating mechanism comprises partition plates, an output main shaft, a drive mechanism and a limiting mechanism, wherein the drive mechanism controls rotation of the output main shaft so that an output shaft connecting lever on the output main shaft can swing between the isolation station, the grounding station and the switch-on station, the drive mechanism comprises an operating main shaft, a grounding main shaft and a switch-on main shaft, and the operating main shaft drives the grounding main shaft and the switch-on main shaft so as to drive the output main shaft to rotate to the grounding position and the switch-on position. One end of the grounding main shaft and one end of the switch-on main shaft are respectively provided with a connecting lever and a spring, wherein the connecting levers and the springs can drive the output main shaft to rotate rapidly, and the limiting mechanism locks the output shaft connecting lever located in the isolation station or the grounding station or the switch-on station. The operating mechanism used for the three-station switch has good switching-on performance, the output main shaft can be accurately limited in the isolation position or the grounding position or the switch-on position, abrasion among all parts can be reduced, and the mechanical service life of limiting parts can be prolonged to the maximum.

The invention discloses a fall-resisting electromagnetic relay which comprises a casing, an electromagnetic part and a base, wherein the electromagnetic part is fixed with the base; the bottom of the casing is connected with the base; the electromagnetic part positioned on the base is accommodated in a casing cavity by the bottom of the casing; the electromagnetic part comprises a magnetic circuit part and a movable spring armature part; the magnetic circuit part comprises a coil rack; the movable spring armature part comprises a movable spring and an armature; a convex part leaned against the electromagnetic part is arranged in the casing; and the convex part is pressed and attached to the electromagnetic part from the vertical direction, so that the electromagnetic part is positioned by the casing in the vertical direction; and a convex part which is away from the movable spring armature by a preset distance is arranged on the inner wall of the casing and can be used for limiting the moving distances of the movable spring armature along the vertical direction and the transverse direction. According to the fall-resisting electromagnetic relay adopting the structure, the electromagnetic part can be accurately positioned inside the casing; the movable spring armature can be accurately limited; the electromagnetic part of the electromagnetic relay is better positioned; and the fall-resisting electromagnetic relay has high fall-resisting performance.

The invention relates to an electric mechanism of an isolating switch and an operating method, designed to solve the technical problem of poor design of a traditional similar mechanism. The mechanism comprises a gear transmission unit, a mechanism action interlocking unit, an electric appliance control unit and an external energy output unit. The mechanism is characterized in that an electric motor, small gears, large gears, a spiral groove camshaft and an output shaft of the mechanism are in transmission connection by a certain transmission ratio; a conversion switch, the spiral groove camshaft, large synchronous wheels and small synchronous wheels are connected by synchronous belts according to a certain transmission ratio; the positions of a interlocking component, the spiral groove camshaft, the small synchronous wheels, a position switch and a position lock cam are unlocked and locked by the rotation of the spiral groove camshaft; and a circuit control board, the conversion switch, the position switch, a magnet and the electric motor are used for controlling the rotation of the whole mechanism by a relay on a circuit board. The mechanism has flexible and convenient installation modes of positive installation and hanging of the isolating switch, and meets various complicated working conditions of the isolating switch.

The invention discloses an automatic reaming machine. The automatic reaming machine comprises a rack (1), a controller (2), a cylinder (3) and a motor (4), wherein a reamer (5) is installed on a motor output shaft; a location seat (6) is installed on a cylinder piston rod; a location boss (6.1) is formed on the location seat (6); a limit block (6.2) is further arranged on the location seat (6); an inductor (7) used for inducting an aluminium freezing motor shell, and clamped and located on the location seat (6) is further installed on the location seat (6); the cylinder piston rod, the location seat (6), the motor output shaft and the reamer (5) are coaxially arranged; the cylinder (3), the motor (4) and the inductor (7) are electrically connected with the controller (2). The automatic reaming machine is high in automation degree, fast in reaming speed, high in efficiency, high in reaming quality, and relatively low in cost.

The invention discloses an automatic chip removal type vertical machine tool which comprises a machine tool body and a chip removal mechanism. The machine tool body is provided with a rotating table base. The rotating table base is provided with a rotating table. The machine tool body is further provided with a machine tool main shaft connected with the rotating table. The chip removal mechanism comprises a material receiving and feeding box arranged at the bottom of the machine tool body, a front inclined panel and a rear inclined panel, wherein the front inclined panel and the rear inclined panel are arranged in the machine tool body. The upper portion of the front inclined panel and the upper portion of the rear inclined panel are connected with the front face and the rear face of the machine tool body respectively. The lower portion of the front inclined panel and the lower portion of the rear inclined panel incline inwards. A waste chip guide and collection space is formed by the front inclined panel and the rear inclined panel in the machine tool body. The space is communicated with the material receiving and feeding box. One end in the material receiving and feeding box is provided with a thruster with a motor and a propulsion plate. The other end in the material receiving and feeding box is provided with a limiting block. The machine tool body is further provided with a protection frame and a vertical protection plate. The protection frame is fixedly connected to the rotating table base of the machine tool body. The automatic chip removal type vertical machine tool aims to solve the problems that in the machining process of an existing vertical machine tool, it is difficult to remove chips, the chip removal efficiency is low, and waste chips cannot be discharged thoroughly.

The invention relates to a refrigerating and freezing device, a door for the refrigerating and freezing device and an installation method of the door. The door comprises a glass face plate, a display and control assembly and a door foamed assembly. The two transverse sides of the backward surface of the glass face plate are each provided with an installation support extending vertically. The display and control assembly is provided with a touch display screen and an installation plate frame. The door foamed assembly is provided with a front door lining, a back door lining, an upper decorative strip, a lower decorative strip and two side frames. A foamed heat preservation layer is formed among the front door lining, the back door lining, the upper decorative strip, the lower decorative strip and the two side frames. The touch display screen is fixed to the glass face plate through the installation plate frame and attached to the backward surface of the glass face plate in a fit manner. The glass face plate is installed on the front side of the door foamed assembly from top to bottom through the installation supports. The installation method of the door comprises the preassembly stage and the final assembly stage which are conducted in sequence. By the adoption of the refrigerating and freezing device, the door for the refrigerating and freezing device and the installation method of the door, the touch effect can be improved, condensation water is prevented from being generated on the touch display screen, and the display and control assembly is convenient to disassemble and maintain. The refrigerating and freezing device comprises a box and the door.