33 results about "Simulated weightlessness" patented technology

The invention discloses a buckle structure and a method for simulating weightless rat tail suspension. The buckle structure includes: a rope body, a first gauze, a second gauze, a first adhesive tape and a second adhesive tape, the first gauze and the second gauze The two gauzes are respectively wrapped around the tail of the mouse and are all cylindrical after being wound. The cylindrical height of the first gauze is less than the cylindrical height of the second gauze, and the second gauze is covered outside the first gauze. The adhesive tape and the second adhesive tape are respectively fixed on the tail of the mouse, the first adhesive tape and the second adhesive tape are respectively located outside the second gauze on the front and rear sides of the first gauze, the rope body is parallel to the tail of the mouse, and the rope body is located outside the second gauze And it is fixed on the tail by the first adhesive tape and the second adhesive tape. The buckle structure of the present invention only needs to apply less tail-tying force and less air-permeable materials, which reduces the stress on rats and greatly improves the success rate of modeling.

The invention provides a tail-suspended rat fixing device which comprises a tail suspension device, a rat fixing box for storing the head and body of a rat, a body fixing device for fixing the body ofa rat, an angle control device for controlling the included angle between the rat fixing box and a pedestal of the tail-suspended rat fixing device. The invention also provides a tail-suspended rat active / passive motion training device which comprises a rat hind limb motion device for training active / passive motion of the hind limb of a rat and further comprises a motion orbit control device forlimiting the motion range of the hind limb of a rat, an active motion training device for training the active motion of the hind limb of a rat, and a passive motion training device for training the passive motion of the hind limb of a rat. The invention realizes the motion training and simultaneously keeps the tail suspension angle unchanged, that is, keeps the rat in a simulated weightlessness state.

The invention discloses a neutral buoyancy trimming device for realizing a wrist structure of an underwater mechanical arm. The neutral buoyancy trimming device for realizing the wrist structure of the underwater mechanical arm comprises a wrist joint, a silicone shell, chambers and valves; N grooves (N is a natural number which is greater than or equal to 2) are formed in a shell of the wrist joint, the N grooves form the chambers, and the chambers are uniformly distributed along the circumference to form semi-circular and circular closed cavities; and the shell of the wrist joint is coveredwith the silicone shell; the valves are located on the silicone shell and are arranged directly above each chamber for enabling the chambers to be filled with gas or non-Newtonian fluid to adjust volume and density to achieve neutral buoyancy trimming. According to the neutral buoyancy trimming device for realizing the wrist structure of the underwater mechanical arm, the internal structure is notchanged, only the density and volume on the shell are changed to achieve equal gravity and buoyancy, and the center of gravity coincides with the center of buoyancy. The silicone of the device is resistant to corrosion, and the corrosion resistance of the wrist structure is improved; the trimming method is simple, the weight of the device is reduced, and the design cost is reduced; and the tightness of the device is improved, the number of the underwater equipment is effectively reduced, and the entire simulated weightlessness training process is enabled to be more convenient.

The invention provides a multi-cell co-culture apparatus used for research of simulated weightlessness. The apparatus comprises a culture bottle body, a culture bottle spiral cover, a semi-permeable membrane, a retaining piece and a cross-shaped support, wherein, the semi-permeable membrane, the retaining piece and the cross-shaped support are used for culturing cells and the culture bottle body,and the culture bottle spiral cover compose a multi-cell co-culture bottle and enable butt joint between the multi-cell co-culture apparatus and a cell simulated weightless device to be realized. Theapparatus can be used for culture of a single kind of cells in a simulated weightless environment and for co-culture of two or more kinds of cells in a simulated weightless environment, fully takes influence of contact among cells and cell communication into consideration, can maximumly meet requirements for multi-cell co-culture in a simulated weightless environment, enables the disadvantage that conventional simulated weightless devices can only culture a single kind of cells to be overcome and is simple to operate and repeatedly usable.

The invention discloses the application of the total saponins of American ginseng stems and leaves in the preparation of a composition for fighting bone loss. The beneficial effect of the present invention is: the application of the total saponins of American ginseng stems and leaves provided by the present invention in the preparation of a composition for combating bone loss, and simulation experiments show that the total saponins of American ginseng stems and leaves can reduce bone loss in mice caused by simulated weightlessness , which means that the use of total saponins from American ginseng stems and leaves can effectively resist bone loss caused by special environments such as aerospace.

The invention provides a new type of flexible cable stiffness determination method and system, including: simulating a weightless environment; in the weightless environment, continuously exciting a motion cabin through a non-contact actuator; establishing a motion monitoring system to measure the relative force of the motion cabin relative to the fixed cabin. Rotation angle and displacement; establish motion cabin dynamics model, output periodic excitation dynamic information; separate periodic excitation motion information and aperiodic excitation motion information in measurement information according to motion separation algorithm; establish stable controller to ensure motion cabin Do not collide with the fixed cabin during the movement; establish a force and moment distribution model of the non-contact actuator, and output the steady-state control force and moment and periodic excitation to the movement cabin; collect the force and moment of the cable end of the fixed cabin, and solve it according to the spring model The flexible cable stiffness coefficient matrix is ​​calculated; the invention provides a reference basis and a calculation model for the selection and interference analysis of the subsequent double-supersatellite model cabin cables.