41results about How to "Limit the maximum displacement" patented technology

The invention provides a method for feeding patient by using an electromagnetic joint manipulator, and relates to a flexible manipulator, in particular to a manipulator for capturing paper cups and feeding the patient. The invention aims to provide an electromagnetic joint manipulator which is simple in structure, low in cost, simple and convenient to operate and high in adaptability, can be adjusted finely according to the size of a captured object, and adapts to and compensates small change of postures of the patient. The electromagnetic joint manipulator comprises an electromagnetic flexible joint (1), wherein the bottom of a flexible barrel (34) is fixed with a lower plate (2); an electromagnet (31), a permanent magnet (32) and an ejector rod (35) are successively arranged in a cavity of the flexible barrel (34) from bottom to top, the electromagnet (31) is fixed at the bottom of the flexible barrel (34), the cavity of the flexible barrel (34) is used as a guide track of the permanent magnet (32), the top of the permanent magnet (32) is fixed with the bottom of the ejector rod (35), and the top of the ejector rod (35) is connected with an upper plate (4).

The invention provides a patient feeding method of an electromagnetic joint mechanical hand, and relates to a flexible mechanical hand, in particular to a mechanical hand used for gripping a paper cup and feeding a patient. The electromagnetic joint mechanical hand provided by the invention is simple in structure, low in cost, simple and convenient to operate and high in adaptive capacity, fine adjustment can be realized according to the size of a gripped object, and the electromagnetic joint mechanical hand can adapt to and compensate for tiny change of the patient posture. The electromagnetic joint mechanical hand provided by the invention comprises an electromagnetic flexible joint (1), wherein the bottom of a flexible tube (34) is fixed with a lower plate (2); an electromagnet (31), a permanent magnet (32) and an ejecting rod (35) are sequentially arranged in the inner chamber of the flexible tube (34) from bottom to top; the electromagnet (31) is fixedly arranged at the bottom of the flexible tube (34); the permanent magnet (32) uses the inner chamber of the flexible tube (34) as a guide rail; the top of the permanent magnet (32) is fixed with the bottom of the ejecting rod (35); the top of the ejecting rod (35) is connected with an upper plate (4).

The invention discloses a control system and a control method for a bridge equipped with a viscous damper. The control method includes the following steps: Step 1: Install the viscous damper between the pier and the beam end of the bridge in advance; the viscous damper The device includes a cylinder and a piston that can reciprocate in the cylinder. The piston is provided with a plurality of passages connecting both sides of the piston, and a switch assembly with the same number of passages. The switch assembly includes a switch for conducting or blocking the passage. part and a driver connected with the switch part; step 2: collect the current motion parameters of the beam end; step 3: calculate the number of channels to be cut off according to the preset reference motion parameters and the collected current motion parameters, and generate The driving signal is used to control the driver to drive the switching element to turn on or cut off the corresponding channel. The purpose of the present invention is to drive each driver to turn on or cut off each channel according to the motion state of the detected beam end, dynamically adjust the damping force, and reduce the longitudinal cumulative displacement of the beam end.

The invention relates to an SMA negative stiffness damping device. The SMA negative stiffness damping device comprises an upper seat plate, a lower seat plate and a slider between the upper and lower seat plates, the lower side of the upper seat plate has a downward convex arc surface, and the upper side of the lower seat plate has an upper Convex arc surface, the upper side of the slider has a concave arc surface that is concave-convex matched with the convex arc surface of the upper seat plate, and the lower side has an upper concave arc surface that is concave-convex matched with the convex arc surface of the lower seat plate. The shock absorbing device also includes an SMA cable wrapped between the upper seat board and the lower seat board and used for pressing the upper seat board and the lower seat board on the slider. The SMA negative stiffness shock absorbing device of the present invention has self-resetting ability, and the SMA cable has the ability to recover its own deformation, which enables the shock absorbing device to recover its own deformation. The SMA negative stiffness shock absorber utilizes the lower convex arc surface of the upper seat plate and the upper convex arc surface of the lower seat plate to form a negative stiffness effect to reduce the internal stress of the lower structure of the shock absorber.

The invention discloses a highway bridge basin-type buffering bracket high in shock absorption property. The highway bridge basin-type buffering bracket high in shock absorption property comprises a bottom basin and a top plate; the bottom basin is provided with a first threaded hole set, a second threaded hole set, a third threaded hole set, a fourth threaded hole set, a fifth threaded hole set, a sixth threaded hole set, a seventh threaded hole set and an eighth threaded hole set; the top plate comprises an upper plate, bosses and anti-collision plates; a stainless steel plate, a Teflon plate, a transition steel plate, an upper offset plate, a lower offset plate, a round pressure plate, a rubber plate, a sealing ring and a buffering pad are arranged between the top plate and the bottom basin; and the bottom basin is provided with eight buffering limit assemblies and four buffering pull rod assemblies. A modular interface is adopted, so that the maintainability of the bracket is improved, the largest displacement in the axial direction and the transverse direction of a bridge is limited, cutting-off bolts are adopted for consuming collision energy, disengagement of the top plate and the Teflon plate is avoided through the buffering pull rod assemblies, heat energy is generated through uneven knurling, energy is consumed, and therefore the service life of the bracket is longer and the use effect of the bracket is better.

The present invention provides a fan-out wafer-level chip packaging structure and a packaging method, wherein the fan-out wafer-level chip packaging structure includes: a conductive layer, on which grooves for setting chips are formed; On the substrate; the insulating layer is arranged between the conductive layer and the substrate, and is used to fill the gap between the conductive layer and the substrate; the package is arranged on the upper surface of the conductive layer; the chip is packaged in the package, and the pad of the chip exposed outside the package; the conductive post is arranged in the package, one end is coupled with the conductive layer, and the other end is exposed outside the package; the conductive post is connected to the ground wire. By placing the chip in the groove on the conductive layer, and the conductive layer is connected to the ground wire through the conductive column, an electromagnetic shielding structure inside the fan-out wafer-level chip packaging structure can be formed, which can reduce the impact of the chip on the packaging structure. The possibility of electromagnetic wave interference of internal devices and external devices is less difficult to prepare and the production cost is lower.

The invention provides a single barrel-type hydraulic damper with a height self-adaptive system and a method thereof. The single barrel-type hydraulic damper comprises a single cylinder-type hydraulic-damping system and a height self-adaptive system. The single cylinder-type hydraulic-damping system comprises a piston cylinder, a piston head, a piston rod, springs, an air cylinder barrel, an air bag and the like. The height self-adaptive system comprises an air source control system, an electromagnetic exhaust valve, an electromagnetic air valve, a pressure compensating valve, an energy accumulator, a control center and the like. The air bag is integrated at the end part of the damper and connected with the height self-adaptive system. The energy accumulator, a check valve and the pressure compensating valve in the height self-adaptive system are connected in parallel to form an independent pressure self-balancing unit, thereby providing a good ground-gripping capability for the damper. During damping, oil liquid gradually attenuates the amplitude of a piston through a damping hole of the piston head; through car speed and up-down vibration acceleration of a car body, inflation and exhaust of the air bag can be controlled so that self-adaptive adjustments can be made to heights. The single barrel-type hydraulic damper is simple and reliable in structure, and is cost-effective and eco-friendly and easy for popularization.