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966results about How to "Avoid harm" patented technology

Robot eye-on-hand system structured light plane parameter calibration device and method

The invention discloses a robot eye-on-hand system structured light plane parameter calibration device and a method. According to the device, a camera and a laser device are installed at the tail end of a robot to form a robot eye-on-hand system, and on the premise of obtaining camera intrinsic parameters, plane parameters of structured light projected by the laser device are calibrated, and thereby structured light three-dimensional vision measurement can be achieved. The robot eye-on-hand system structured light plane parameter calibration method includes that a plane checkerboard target is placed in a calibration area, laser lights are projected on the target to form a first line structured light stripe, the robot is controlled to move in a constraint mode so as to project the laser lights to another position of the target to form a second line structured light stripe, the camera respectively acquires images of two structured light stripes at two calibration positions, the relation of three-dimensional coordinate of points on stripe straight lines under a camera coordinate system at the two calibration positions is calculated, and thereby the structured light plane parameter calibration with the structured light stripe straight lines serving as calibration elements can be achieved.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI +1

Environment-friendly type alkali-free liquid accelerator for sprayed concrete and preparation method thereof

InactiveCN101423356AAvoid harmNo corrosive hazardRebarAluminium salts
The invention belongs to the technical field of building materials, and in particular relates to an environment-friendly alkali-free liquid quick-setting agent used for shotcrete and a method for preparing the same. The alkali-free liquid quick-setting agent is a light green viscous liquid prepared from aluminum sulfate, sodium fluoride, triethanolamine and polyacrylamide, wherein the aluminum sulfate and the sodium fluoride are main quick-setting components, the aluminum sulfate can significantly reduce the initial setting time of cement, while the sodium fluoride can significantly shorten the final setting time of the cement, promote the formation of a hydrate structure, and improve the shear strength of the concrete and the binding power of a reinforcing steel bar. The triethanolamine shortens the setting time of the concrete to csertain extent and greatly improves the 1d compressive strength of mortar, and the polyacrylamide is an organic tackifying component to improve the thickness of a primarily sprayed layer, improve the bond strength between the concrete and a substrate, reduce the rebound loss in the spraying process, and save materials. The environment-friendly alkali-free liquid quick-setting agent has the advantages of wide source of raw materials, low cost, simple production method, and high production efficiency, and is suitable for industrial mass production.
Owner:TONGJI UNIV

Apparatus and method thereof for finger rehabilitation exercise

InactiveCN105287160AAchieve bending motionAvoid harmChiropractic devicesKnuckleRehabilitation exercise
The invention relates to an apparatus and a method thereof for finger rehabilitation exercise. The apparatus comprises a first knuckle fixing part, a second knuckle fixing part, a metacarpal bone fixing part and a pressure control device, wherein both the first knuckle fixing part and the second knuckle fixing part comprise knuckle fixing frames and fixed plates, and the knuckle fixing frames are arranged on the fixed parts; the metacarpal bone fixing part comprises a metacarpal bone fixing frame and a fixed plate; the metacarpal bone fixing frame is arranged on the fixed plate; the first knuckle fixing part and the second knuckle fixing part are connected by virtue of a first telescopic connecting part, and the first telescopic connecting part is a hollow structure; the second knuckle fixing part is connected to metacarpal bone fixing part by virtue of a second telescopic connecting part, and the second telescopic connecting parts is a hollow structure; the first telescopic connecting part and the second telescopic connecting part are communicated by virtue of a connecting pipe; and the second telescopic connecting part and the pressure control device are communicated by virtue of a pipe. According to the apparatus disclosed by the invention, the connecting part is driven by gas or liquid, so that the apparatus is quite good in flexibility and adaptability; and moreover, the apparatus is simple in structure and low in cost.
Owner:HENAN HUIBO MEDICAL CO LTD

Hydraulic superhigh-frequency vibrating power head

InactiveCN102900354AAvoid harmVibration frequency stepless adjustmentReciprocating drilling machinesConstructionsUltrahigh frequencyDrill hole
The invention discloses a hydraulic superhigh-frequency vibrating power head and belongs to the field of shallow drilling and sampling. The hydraulic superhigh-frequency vibrating power head comprises a rotary motor, a coupler, a coupler box, a vibrator, a vibration damper, a spindle, a power head back plate and a support plate, wherein the rotary motor is connected with the upper end of the spindle via the coupler, and the spindle is vertically penetratingly arranged in the vibrator. The vibrator is connected with a bottom plate of the coupler box via the vibration damper and comprises a vibrator box, two groups of high-speed hydraulic motors, two eccentric shafts, a synchronous belt/ synchronous wheel forced synchronizing mechanism and a high-speed bearing cooling and lubricating device, wherein the two groups of high-speed hydraulic motors are symmetrically arranged on two sides of the spindle, the high-speed hydraulic motors drive the eccentric shafts to rotate via key joint, and the two eccentric shafts can realize synchronous running via the synchronous belt/ synchronous wheel forced synchronizing mechanism. The hydraulic superhigh-frequency vibrating power head is capable of conveniently and effectively realizing shallow drilling and sampling on various overburden layers, drilling speed is improved, and popularization is facilitated.
Owner:中煤地第二勘探局集团有限责任公司 +1

Rope-driven wearable upper limb rehabilitation training robot and using method thereof

The invention discloses a rope-driven wearable upper limb rehabilitation training robot and a using method thereof. A flexible armor is worn on a trunk part of a user, corresponding shoulder belts, awaist belt and a chest belt are arranged at the portion, on the corresponding portions of the human body, on the flexible armor separately, a shoulder module is fixed to the shoulder part of the flexible armor, upper arm modules are worn on the upper arm portions of the user, and front arm modules are worn on the front arm portions of the user; the upper arm modules are connected with the front arm modules through rope assemblies, a driving backpack is arranged on the flexible armor and internally provided with a power control module and several motors, and all motor rotation shafts are provided with driving wheels for collecting or releasing the corresponding rope assemblies. By means of the rope-driven wearable upper limb rehabilitation training robot, rehabilitation training of the degree of freedom of adduction/abduction and flexion/extension of the shoulder joints and flexion/extension of the elbow joints can be achieved, and the robot can also be used for assisting in upper limbmovement in daily life, and has the advantages of being portable, lightweight and the like.
Owner:SOUTHEAST UNIV

Corrugation self-check double-protection compensator

The invention discloses a corrugation self-check double-protection compensator. The compensator comprises an operating corrugated pipe, both ends of the operating corrugated pipe are provided with aninlet end pipe and an outlet end pipe respectively, a draft tube and an external protection tube are provided in and outside the corrugated pipe respectively. The compensator is characterized in that:a connection flange is welded between the operating corrugated pipe and the outlet end pipe, a protective corrugated pipe is connected between the connection flange and the external protection tube,and the protective corrugated pipe is sheathed on the outlet end pipe, and the external protection tube is fixedly provided with a leak detection device. The compensator has the advantages of being capable of ensuring flow quantity and flow rate of media, the protective corrugated pipe act sealing effect to protect the operating corrugated pipe from corrosion by external sewage and impurities, thus prolonging service life of the compensator; the compensate can continue work even the operating corrugated pipe present leakage, thus providing double protection; the protective corrugated pipe hasprotection and compensation effect, thus being capable of avoiding environment hazards caused by media leakage, so the compensator is especially applicable to pipes for conveying toxic and harmful dangerous media.
Owner:锦州中德波纹管件制造有限公司

Technical method for rapid gas extraction standard reaching in broken soft, low-permeability and outburst coal seam by replacing roadways with holes

The invention provides a technical method for rapid gas extraction standard reaching in broken soft, low-permeability and outburst coal seam by replacing roadways with holes. The method comprises thefollowing steps that S10, a large-diameter super-long directional drilling hole is constructed on the basic top layer of a coal seam roof or the old bottom layer of a coal seam floor; S20, the spacingd of small-curvature-radius branch drilling holes arranged in a penetrating mode in the coal seam to be excavated and the number n of the small-curvature-radius branch drilling holes are determined according to the drilling hole gas extraction influence radius r of coal seam to be excavated and extraction standard reaching time; S30, a retreat branch method is used for constructing the small-curvature-radius branch drilling holes; S40, a special permeability improvement device for underground coal mine is used for performing gas phase fracturing permeability improvement or combination of hydraulic fracturing and gas phase fracturing permeability improvement on the small-curvature-radius branch drilling holes until a plurality of sections of three-dimensional fissures are formed; and S50,connecting pipelines extracts the gas in the coal seam until the gas content of the coal seam meets extraction standard reaching. The construction method can achieve low-cost, long-distance, dense, controllable, high-efficiency extraction of the gas from the coal seam.
Owner:XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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