603results about How to "Short stroke" patented technology

The invention relates to an operation positioning device and method and a robot operation system. The operation positioning device comprises a positioning ruler, an upper computer and a series-connection mechanical arm with at least six degrees of freedom. The upper computer is connected with the series-connection mechanical arm, the positioning ruler comprises two opposite surfaces allowing X-rays to transmit, the two opposite surfaces are fixedly connected through a connecting surface allowing X-rays to transmit, the two opposite surfaces are respectively provided with a group of marks, each group of marks comprise at least four mark points which are not located on the same straight line, and the mark points are X-ray-proof components. Any opposite surface or the connecting surface is fixedly connected with a ruler handle, and the ruler handle is connected with the tail end of the series-connection mechanical arm through a port. The upper computer adjusts the position of the positioning ruler by controlling movement of the series-connection mechanical arm, space positioning calculation is conducted according to the mark points in collected images, and a planning path is obtained. The device can achieve perspective positioning at any angle, and can eliminate system errors caused when an operation path is calculated, increase working space and improve the operation positioning accuracy.

A pump having an undulating diaphragm mounted for undulating between two end plates under drive from at least one electromagnetic actuator in order to transfer a fluid between an inlet of the pump and an outlet of the pump. The pump includes adapter means connecting the diaphragm support to a movable portion of the actuator in order to shorten the stroke of the movable mass of the actuator such that its stroke is shorter than the stroke of the diaphragm support.

An expansion-set fluid production assembly transfers well fluids from a casing string 12 to a production tubing string 112. A tubular anchor 72 and tubular expander 70 may be positioned downhole on a running tool at a desired depth along the casing string 12. An actuator assembly 10 may forcibly move the tubular expander 70 into the tubular anchor 72, expanding the tubular anchor 72 to seal and secure the tubular anchor 72 against the casing string 12. The running tool actuator assembly 10 may be removed, leaving the expanded tubular anchor 72 and tubular expander 70 downhole. A seal nipple 122 may be sealed with the tubular expander 70 and to the production tubing string 112. Fluids may then be recovered from the wellbore through the casing string 12, through the fluid production assembly, and into the production tubing string 112.

A driving controlling apparatus for a linear compressor, comprises a controlling unit for detecting a TDC by a phase difference inflection point between a stoke and a current with increasing the stroke by controlling the current applied to a linear motor, and for varying the current applied to the linear motor based on the detected TDC.

A moulding device for the production of containers in thermoplastic material, by blowing or blow-drawing, including a mould with two mould halves mutually mobile and provided with a locking device with two lock elements extending over the total height of the respective mould halves and provided with a number of projecting fingers in catches spaced at intervals, one lock element being fixed on one mould half and the other lock element sliding on the other mould half under the action of an actuator device.

The invention discloses a wind tunnel model supporting device which comprises a movable platform, a clamping device, a first driving unit and a second driving unit, wherein the movable platform has three translational freedom degrees and at least one rotation freedom degree. The clamping device is connected with the movable platform and is used for fixing and supporting the model. The first driving unit and the second driving unit are arranged on the movable platform and used for driving the clamping device, and therefore, the clamping device obtains the freedom degrees of rotation in horizontal and transversal directions. The first driving unit comprises a first driving motor and a first rope traction mechanism. The second driving unit comprises a second driving motor and a second rope traction mechanism. The wind tunnel model supporting device with simple and reliable structure can realize six freedom degrees of the model in the wind tunnel test, effectively expand the model pitch and the roll amplitude capable of being realized by model supporting, and decrease the acceleration, the motion speed and the motion travel of the driving units through the first driving unit and second driving unit which are connected in parallel.

The invention discloses a short-stroke crankshaft connecting rod device for a tricot machine. The invention comprises eccentric shafts, a first shaft journal (4), a second shaft journal (5), a central wall plate (7), a grooved needle bed connected with a first eccentric shaft (1), a yarn guide needle bed crankshaft connecting rod mechanism, a stylet bed crankshaft connecting rod mechanism connected with a second eccentric shaft (2), and a sinker bed crankshaft connecting rod mechanism connected with a third eccentric shaft (3). The first shaft journal (4) and the second shaft journal (5) are respectively and fixedly connected with the end parts of the second eccentric shaft (2) and the third eccentric shaft (3). The second eccentric shaft (2), the first eccentric shaft (1) and the third eccentric shaft (3) are connected with each other in turn and are rotated around the first and second shaft journals (4, 5). The short-stroke crankshaft connecting rod device effectively shortens the motion stroke of weaving elements; the grooved needle travel is between 8 and 12 millimeters; the moving time of yarn guide needles is between 1.5 and 1.8 microseconds; the engine speed is improved to be 2500 to 3000 turns per minute; the noise is less than or equal to 85 decibels; the vibration is small; the energy consumption is low; the device is suitable for high-speed rotation; the power is small; and the productivity is obviously improved.

In a thick matter pump, especially for delivering concrete, comprising two delivery cylinders, it is known to provide two position sensors in one of the two cylinders for control of the pistons. However, leakage of hydraulic fluid can lead to an imbalance of the two cylinders. In the invention two position sensors (52′, 52″) are provided, which are arranged at a defined distance from one of the ends of the drive cylinders and which respond to a drive piston (30′, 30″) that is passing by. To prevent the formation of concrete clots inside the delivery cylinders (10) and to prevent the occurrence of a slamming when the drive pistons (30′, 30″) reach their end of travel, the invention provides that both position sensors (52′, 52″) are arranged at a distance from the piston rod-side ends of both drive cylinders (24′, 24″) and, in addition, a correcting sensor (54) is arranged at a defined distance from the piston head-side end of one of the drive cylinders (24′). This correcting sensor can be temporarily activated for initiating a reversing process overruling the rod-side position sensor (52″) of the other drive cylinder (24″).

The invention relates to a jiggling phase searching method, wherein a phase searching current is applied to the winding of the three-phase AC servo motor, and an electric angle alpha of the rotor magnetic pole relative to the stator is determined through measuring jiggling of the motor, which includes steps: 1. defining and initializing the phase searching parameters; 2. applying a gradually increased phase searching current corresponding to the assumed value of the electric angle alpha[0] so as to generate jiggling of the rotor, then turning to the step 5 if the phase searching current reaches a maximum value I[max] and the movement of the rotor still does not exceed a permitted deviation angle delta; 3. determining an angle modification value theta; 4. modifying the assumed value of the electric angle alpha[0] based on jiggling direction of the servo motor and the angle modification value theta, then returning to the step 2; 5. using the assumed value of the electric angle alpha' as the actual value of the electric angle alpha; and optionally 6. determining and correcting the phase sequence of the three-phase winding wiring of the motor, wherein the angle modification value can be determined by subsequently using a bisection method and a bias weighted stepping method. Comparing with methods in prior art, the method has features of small stroke, fast phase searching speed, high phase searching precision, and wide range of compatibility because it is applicable not only to the rotation motors, but also to the linear motors.

To provide a traveling crane operation control apparatus and method enabling an operator to operate a traveling crane quickly and accurately by one hand and by a motion of his or her body with a controller worn thereon, without the need to gaze at his or her hand, and also allowing variable-speed control and fine speed control of each drive unit.

An operation control apparatus for a traveling crane has an operation control circuit section 1 including a base unit 2 wearable on an arm 4 of an operator and a control unit 3 operable by a hand. The base unit 2 has base unit tilt detecting means detecting a tilt direction and tilt angle of the base unit 2 in a vertical plane, base unit direction detecting means detecting a direction in which the base unit 2 points in a horizontal plane, and command signal generating means generating a travel command signal and a travel speed command signal for a travel motor, a traverse command signal and a traverse speed command signal for a traverse motor, and an elevation command signal and an elevation speed command signal for an elevation motor. The traveling crane can be controlled to perform travel, traverse, lifting and lowering operations simply by pointing the base unit 2 in a direction in which travel and traverse motions are desired to occur and in a vertical direction in which a lifting or lowering motion is desired to occur, and actuating the control unit 3.

The invention discloses an anti-shake device and method of a video camera. The anti-shake device comprises a position sensor, a controller, a servo mechanism, an imaging device and a frame extraction device, the position sensor measures linear acceleration and angular acceleration caused by shaking of the video camera and transmits the linear acceleration and the angular acceleration to the controller, the linear acceleration and the angular acceleration caused by shaking can be converted into mobile distance and angle by the controller, the mobile distance and angle are then compared with the maximum distance and the maximum angle of moving of the imaging device, image frames with the moving distance and angle caused by shaking and exceeding the maximum distance and the maximum angle of moving of the imaging device is abandoned in advance, and on the premise of no influence on subjective feeling of videos, the image frames exceeding the set frame number are abandoned actively according to preset strategies, the servo mechanism is controlled to stop actions within the framing period of abandoning the image frames in advance and the frame extraction device is controlled to abandon the image frames to be abandoned. By the anti-shake device and method, operation time and distance of the servo mechanism are reduced, and servo accuracy requirements are lowered.

A walking assistance device has a drive mechanism, which is provided with a linear-motion actuator including an electric motor installed in the upper link member, nut members which are rotationally driven by the electric motor, and a linear-motion output shaft which linearly moves in the direction of the axial centers of the nut members, and a crank arm which is secured to the lower link member coaxially with a joint axis of a third joint and swingably attached to one end of the linear-motion output shaft. The drive mechanism is constructed such that a translational force output from the linear-motion output shaft of the linear-motion actuator is converted into a rotational driving force of the third joint through the crank arm.

A torsional ultrasound surgical hand piece lessens or eliminates chatter from lens material by imparting a twisting, rotary motion to a tip of a phacoemulsification needle at a resonant frequency in excess of 32 kHz. The hand piece has a horn that is designed to operate at an elevated frequency while maintaining size constraints for hand-held ophthalmic instruments. Optionally, heat generation is reduced either through the use of a polyimide tubing situated between the needle and the infusion sleeve, through the use of thermal watch to prevent overheating at the incision, and/or through the use of a bypass hole in the needle that diverts flow under suction into the needle via the bypass hole instead of exiting through an irrigation opening in the infusion sleeve when a tip port is occluded by lens material.

An apparatus is provided with a processing tray 42 to mount sheets ejected from an image formation section, aligning means (aligning plates 61, etc.) for aligning end portions of a sheet ejected on the processing tray 42, a post-processing apparatus 43 that performs binding processing on the sheets aligned by the aligning means, and moving means (unit moving motor 60, etc.) for moving the post-processing apparatus 43 to a plurality of post-processing positions set to perform the binding processing at different binding processing target position on the sheets, and moves the sheets to a post-processing undergoing position corresponding to the post-processing position substantially in parallel with a travel direction of the post-processing apparatus 43. It is thereby possible to perform the binding processing on the ejected sheets appropriately while implementing the apparatus compact in size.

The invention which belongs to the technical field of flavorings especially relates to a salt-free soy. A technical scheme of the salt-free soy comprises the following steps: 1, mixing raw materials of soybean (bean cakes and soybean meal oil cakes), wheat bran (or crushed wheat) or rice husk, moistening, and steaming them in a boiler; 2, air-cooling the raw materials, mixing the raw materials with a koji forming material, adding water, uniformly stirring them, fermenting the raw materials in a pool, and spraying oil to leach after the fermentation; and 3, heating a raw soy, adding a flavoring as needed, directly clarifying the heated raw soy if the taste needs no adjustments, sterilization-disinfecting, and packaging to form finished products after the quality detection qualification. The salt-free soy has the following beneficial effects: the oxidation resistance of the salt-free soy is 150 times higher than the oxidation resistance of vitamin C; and generations of arteriosclerosis, myocardial infarction, apoplexy, hypertension, heat diseases and cataract are reduced after the salt-free soy is taken for a long term. The salt-free soy is suitable for people needing light diets and a proper amount of salt.

Apparatus (10) rests on the seabed at a location below sea level for capturing wave energy. The apparatus (10) comprises a body structure (11) having a diaphragm (25) adapted to deflect in response to wave action. A working chamber (27) is disposed immediately below the diaphragm (25) and contains a compressible fluid such as air. A pump system (43) is accommodated within the working chamber (27). The pump system (43) comprises two reciprocating pumps (45, 47) operating in opposition. The pumps (45, 47) are operably connected to the diaphragm (25) through a lever mechanism (61). Because of the geometry of the lever mechanism (61), the stroke length of each pump (45, 47) is less than the amplitude of displacement of the diaphragm (25) as it moves in response to wave action. Thus, the lever mechanism (61) increases the force acting on each pump (45, 47) by a given ratio and reduces the stroke of each pump by the same ratio. The reduction in stroke length provides for compact construction so that the pumps (45, 47) can be readily accommodated within the working chamber (27). The pumps (45, 47) draw seawater from the environment about the apparatus (10) and discharge the seawater at a high-pressure. The high-pressure seawater generated by the pumps can be piped to shore for use in any appropriate purpose.