49results about How to "High movement sensitivity" patented technology

The present invention provides a handheld robot for orthopedic surgery and a control method thereof. The handheld robot of the present invention includes a main body, a grip, a kinematic mechanism, a tool connector, a tool, a force sensor and a positioning unit. The handheld robot of the present invention combines the position/orientation information of the tool acquired by the positioning unit with the force/torque information acquired by the force sensor, and utilizes the combined information to adjust the position of the tool so as to keep the tool within the range/path of a predetermined operation plan. In this way, the precision of the orthopedic surgery can be enhanced, and the error occurred during the surgery can be minimized.

The invention provides a flexible back supporting device for a large-caliber reflector. The supporting device comprises the large-caliber reflector, a lens back plate, a supporting plate, a joint plate, a screw, flexible branch hinges, sliding flexible hinge supports, a flexible hinge connecting rod and a driving system. The three flexible branch hinges and the joint plate together form a combined hinge to constrain three degrees of horizontal moving freedom of the large-caliber reflector, the pitching and deflecting movements of the large-caliber reflector are achieved through flexible hinge blocks of the sliding flexible hinge supports and the driving system, when the driving system is tightly locked, the two degrees of rotating freedom of the large-caliber reflector are constrained, and the degree of the plane inner rotating freedom of the large-caliber reflector is constrained through the flexible hinge connecting rod. The flexible hinge structure is adopted as the supporting and positioning mechanism of the large-caliber reflector, nanoscale positioning precision is achieved, and the structural stability and the precision stability are ensured through matched design of the flexibility and the moving precision of the large-caliber reflector. The flexible back supporting device has the advantages of being simple in structure, stable in movement, free of friction or gaps, needless for lubrication and high in moving sensitivity.

The invention discloses a fast reflection mirror, comprising a base, a working mirror body, cross spring bearings and a driver; the working mirror body is assembled on a reflection mirror seat; two cross spring bearings constitute one group, there are totally two groups, wherein the axes of the two cross spring bearings in the first group of cross spring bearings coincide with a first straight line, and the axes of the two cross spring bearings in the second group of cross spring bearings coincide with a second straight line; the first straight line and the second straight line are perpendicular to each other and intersected at an origin; each cross spring bearing is connected to the reflection mirror seat and the base respectively; and the driver is used for driving the reflection mirrorseat to rotate within a preset angle range around the first straight line and/or the second straight line. According to the fast reflection mirror, the cross spring bearings support the reflection mirror seat, the cross spring bearings have the advantages of large deflection range and high rotating precision, and when the cross spring bearings are used with the driver, the deflection angle and therotating precision of the working mirror body can be improved, so that the fast reflection mirror is applicable in the fields of precision machinery, precision measuring instruments, medical equipment and the like.

Provided are a tilted vibration sensor incorporating a plurality of electrodes and a conductive spherical body which is turned on and off by the moving displacement of the spherical body, and which may be remarkably reduced in size and may have high performance and high operating sensitivity, high durability, and high reliability; and a method of manufacturing the sensor. The case (1) of the sensor comprises a case body (5) formed of a non-conductive material having such excellent gas-barrier property and heat resistance that can stop the transmission of gases which affects on the on/off operation of the sensor due to the moving displacement of the conductive spherical body (4) and a cover body (7) sealing airtight the opening part (6) of the case body. In the method of manufacturing the vibration sensor, moisture and particulate impurities affecting the on/off operation are removed from the hollow part (2) of the case (1), and the hollow part is evacuated.

The invention discloses a three pairs of sliding pair-spherical hinge-spherical hinge (3-PSS) mechanism-based coordinate measuring machine. The 3-PSS mechanism-based coordinate measuring machine is characterized in that: a three pairs of sliding pair-spherical hinge-spherical hinge parallel mechanism is provided; three motion sliding blocks are independently arranged on a pair of ball guide rails which are arranged in parallel and can slide freely along the ball guide rails respectively; the three motion sliding blocks are connected with one end of each of three pairs of link rods through one end of a universal joint respectively; the other end of each of three pairs of link rods are connected with a measuring moveable platform through the other end of the universal joint respectively; a measuring head is arranged on the lower plane of the measuring moveable platform; three indication gratings are fixedly connected to the three motion sliding blocks respectively; a scale grating and the pair of ball guide rails are arranged in parallel and are arranged on the guide rail mounting surfaces of guide rail cross beams; and the guide rail cross beams are suspended and fixedly connected to a pair of brackets. The 3-PSS mechanism-based coordinate measuring machine has high rigidity, a simple structure, high processing assembly property and low cost and can measure the three-dimensional space sizes, the shapes and the mutual positions of parts quickly and precisely.

The invention discloses a novel linear rolling and sliding composite guide rail pair, comprising a guide rail and a sliding block fit with each other, wherein the guide rail is trapeziform, two side faces of the trapeziform guide rail are guiding faces, the upper surface of the trapeziform guide rail is a bearing surface, the bottom of the sliding block is provided with a trapeziform groove fit with the trapeziform guide rail, the two side faces of the trapeziform groove are respectively provided with at least one row of cylindrical rollers along the length direction, a guide rail soft strip is arranged between the upper surface of the trapeziform groove of the sliding block and the bearing surface of the trapeziform guide rail along the length direction of the guide rail. The novel linear rolling and sliding composite guide rail pair integrates the advantages of a rolling guide rail and a sliding guide rail, ensures the guiding and positioning accuracies of the motion guide rail and the bearing capacity of the guide rail and simultaneously reduces motion resistance reasonably in the case of loading heavily and cutting heavily, promotes sensitivity, rigidity and vibration resistance of the motion guide rail, improves machining efficiency and prolongs the service life of the guide rail.

The invention discloses a controllable high-frequency-response probe test moving device for microwave and millimeter wave chips. The controllable high-frequency-response probe test moving device comprises an industrial personal computer, a control module, a driver, a servo motor, a precision displacement device and a grating ruler. The precision displacement device comprises a precision workbench, a driver I, piezoelectric ceramics and a flexible hinge. The industrial personal computer is connected with the control module, the control module is connected with the driver, the driver is connected with the servo motor, the servo motor is connected with the driver through an encoder, the servo motor is connected with the precision workbench, the precision workbench is connected with the driver I, the driver I is connected with the piezoelectric ceramics, the piezoelectric ceramics is connected with the flexible hinge, the flexible hinge is connected with the workbench, the workbench is connected with the control module through the grating ruler, the driver I is connected with the control module, prior one-time positioning is changed into coarse positioning in which the motor drives a lead screw, and the precision displacement device belongs to secondary positioning of fine positioning. A fine positioning system is high in test speed, and on the premise of not affecting test acceptability, test cycle is shortened greatly, efficiency and productivity are improved, and test cost is reduced.

The invention discloses a sliding device, in particular a slide guide rail rolling and unloading device for machine tool equipment. The device comprises a guide rail and a slide seat (1) which is positioned on the guide rail and can slide relative to the guide rail, and is characterized in that: at least three positions matched with the guide rail on the bottom surface of the slide seat (1) are provided with roller wheels (6), and the circumferential lateral surfaces of the roller wheels (6) are contacted with the upper surface of the guide rail positioned under the slide seat (1). In the device, as the slide seat and the guide rail do not directly contact, are supported by the roller wheel, and slide, the device realizes line contact of the roller wheel and the guide rail, greatly reduces the mutual friction area, reduces moving resistance, saves energy and lowers the requirement on lubrication compared with a sliding mode of surface contact.

The invention provides a three-way decoupled force measurement type piezoelectric fast tool servo device, and relates to the technical field of ultra-precision machining. The device comprises a tool holder seat, an X-direction drive platform, a Y-direction drive platform and a Z-direction drive platform, wherein a three-way force measuring device for measuring the turning force of a tool in a decoupling mode is arranged in the tool holder seat, the X-direction drive platform, the Y-direction drive platform and the Z-direction drive platform are of same structures and all comprise flexible connectors connected with the tool holder seat, both sides of the flexible connectors are symmetrically connected with displacement amplifying mechanisms through flexible hinges, the displacement amplifying mechanisms are connected with piezoelectric drivers, the displacement amplifying mechanisms comprise multi-stage amplifying mechanisms connected through flexible hinges, and displacement detectingmechanisms are arranged on the flexible connectors. The device solves the problems that a fast tool servo device in the prior art is difficult to simultaneously achieve the large-stroke synchronous reciprocating movement in the X-direction, the Y-direction and the Z-direction, and the cutting force and the movement position in the machining process cannot be simultaneously detected, resulting in low machining quality.

An XYZ three-freedom-degree precise positioning device comprises an XY motion base and a Z axis motion module; the Z axis motion module is mounted on the XY motion base, and the XY motion base comprises a base plate; displacement devices and a motion platform are arranged on the base plate, two displacement devices are located on the X axis and the Y axis correspondingly, and are flexible mechanisms with piezoelectric ceramics, and each displacement device comprises a left lever, a right lever, an input end mounting block and an output end mounting block, first containing grooves are formed in the base plate, the displacement devices are mounted in the first containing grooves, the lower ends of the left levers and the lower ends of the right levers are hinged to the lower groove walls of the first containing grooves through hinges, the input end mounting blocks are hinged to the lower portions of the right sides of the left levers and the lower portions of the left sides of the right levers through hinges, the output end mounting blocks are hinged to the upper portions of the right sides of the left levers and the upper portions of the left sides of the right levers through straight beam type flexible hinges, and the output end mounting blocks are mounted on the motion platform through the straight beam type flexible hinges.

The invention provides a magnetic inductive sensing system for sensing electromagnetic signals emitted from a body in response to electromagnetic excitation signals applied to the body. The electromagnetic signals are generated and sensed by the same loop resonator which comprises a single-turn loop antenna and a tuning capacitor. The loop antenna of the resonator and a signal generation means for exciting the resonator to generate excitation signals are together configured so as to optimize the value of a ratio between the radial frequency of the generated electromagnetic excitation signals and a reference frequency of the antenna, where the reference frequency is the frequency for which one wavelength of the generated excitation signals (waves) matches the circumferential length of the antenna. This ratio, which corresponds to a normalized radial frequency of the generated excitation signals, is maintained between a value of 0.025 and 0.50.

The invention discloses a back support form support structure for a large-aperture reflector. The back support form support structure comprises an optical lens, a rib plate and a back plate, wherein the rib plate is parallel with the back plate, a three-claw flexible hinge, a disc flexible hinge I and a disc flexible hinge II are arranged between the rib plate and the back plate, and the back plate is provided with an anti-rotation flexible hinge, four protecting pieces and two drive components; three blind holes with precise expansion bushings are formed in the back of the optical lens, and the three precise expansion bushings are fixedly connected with the rib plate; the front portion of the three-claw flexible hinge is connected with the rib plate, and the rear portion of the three-claw flexible hinge is connected with the back plate; one ends of disc flexible hinge I and the disc flexible hinge II are in one-to-one correspondence to the two drive components and are connected through a connector, the other end of the disc flexible hinge I and the other end of the disc flexible hinge II are connected with the rib plate, and the anti-rotation flexible hinge is connected to the lateral side of the disc flexible hinge II; the four protecting pieces are connected to the back plate through lifting bolts, and the optical lens is located among the four protecting pieces. The back support form support structure is simple, stable in motion, free of friction, free of gaps, high in motion sensitivity and high in reliability and does not need lubrication.

The invention discloses a one-dimensional precision translation mechanism, which can realize the functions of precision transmission and precision measurement; the implementation of the invention is driven by two sets of parallel reed mechanisms, and the two sets of parallel reed mechanisms are mutually nested, It exhibits constant potential energy and continuous balance of motion within its travel range. On the one hand, the movement trajectory of the translation plate and the displacement detection device are on the same straight line, which conforms to the Abbe principle, so that the Abbe error of the mechanism transmission is zero, thereby realizing the precise transmission of the translation plate relative to the fixed plate. On the other hand, this The translation mechanism can ensure that the coordinate axis orthogonal to its movement direction is upward, and the accumulated motion error is zero. Therefore, the movement of the one-dimensional precision translation mechanism has high precision and good sensitivity, and there is no mechanical friction, no gap, and no mechanical friction during the movement process. Lubrication and other advantages. The one-dimensional precision translation mechanism can be widely used in technical fields such as precision measurement, precision manufacturing and precision transmission.

The invention provides a microgripper with two-stage constant force output in continuous two strokes and a control method. The microgripper is of a flexible integrated structure, wherein a constant force mechanism is composed of four groups of bistable negative stiffness beams and a lever part. The principle of a two-stage constant force mechanism is that a two-stage negative stiffness curve is obtained through the parameter design of the four groups of bistable negative stiffness beams, then the lever part is connected in parallel to achieve positive stiffness compensation, and thus a continuous two-stage zero stiffness curve is obtained. The microgripper can output two stages of constant clamping force in two effective strokes. The microgripper has the advantages that multi-size adaptability is achieved, the volume is small, no friction is achieved, no assembly is achieved, and the motion sensitivity is high.