178results about How to "Protect against damage" patented technology

The invention provides a microwave anechoic chamber performance measuring method, which comprises the following steps of: adopting a microwave anechoic chamber performance measuring system, and setting a dead zone parameter, a measuring frequency, a signal source power, a scanning trace and a kinematic velocity of a receiving antenna, and a rotation direction and a rotation velocity of a transceiving antenna according to the requirements of a microwave anechoic chamber performance analysis test; driving a signal source according to the signal source power; driving each stepping motor to control each moving part to move according to the scanning trace and the kinematic velocity of the receiving antenna, and the rotation direction and the rotation velocity of the transceiving antenna; and controlling a signal receiver to receive a signal of the receiving antenna according to the measuring frequency, and storing the signal. The method can be adopted to be applied in a microwave anechoic chamber flexibly so as to measure along different scanning traces; and a computer is adopted to realize automatic measurement of microwave anechoic chamber dead zone reflectivity level, cross polarization character, multi-path loss uniformity, and field uniformity performance indexes, so that the measuring efficiency is improved.

The invention provides an application method of an all-transparent vacuum glove box. The vacuum glove box is produced by high-transparency organic glass or an acrylic material, and comprises an operation box body, a circular door, an inner transition bin door, an outer transition bin door, a glove port, a vacuum air valve and a vacuum pressure gauge, wherein a larger apparatus or material is fed from the circular door at one end of the operation box body; a small sample or apparatus is fed in a transition bin from the outer transition bin door at the other end of the operation box body; a vacuum system is accessed into the vacuum valve; the operation box, the transition bin and the glove port are synchronously vacuumized; the vacuum valve is closed after the vacuumizing is finished; then, an inert gas system is accessed into the vacuum valve; high-purity inert gas is synchronously charged in the operation box and the transition bin until the indicating numerical value of the vacuum pressure gauge reaches 0, and the vacuum valve is closed; the operation is repeated for 2-3 times, the atmosphere in the box body can reach high-purity inert gas atmosphere-anaerobic oxygen water environment, and the corresponding operation can be performed for an object; after the operation and the application are finished, a sample is taken out from the glove box through the transition bin; and as the whole glove box adopts the acrylic material to achieve high transparency, the operation process of no-dead angle sample observation by 360 degrees is realized.

The invention discloses a variable stiffness joint based on a cylindrical cam and a control method thereof. According to the variable stiffness joint, a cylindrical iron core electromagnet is mountedon a cylindrical cam cylinder; an annular armature is mounted on the side of a roller of a roller disc; the electromagnet generates electromagnetic attraction to the annular armature; the roller movesin a curved surface groove formed in the wall of the cylindrical cam cylinder, so that the cylindrical cam cylinder rotates and generates restoring torque; by increasing a current of an electromagnetcoil, an axial force borne by the roller disc is increased, and the joint rigidity is increased; and by reducing the current of the electromagnet coil, the axial force borne by the roller disc is reduced, and the joint rigidity is decreased. The control method of the variable stiffness joint comprises the steps of: inputting target stiffness by means of a computer; regarding a calculated actual rigidity value as a feedback signal; calculating a rigidity control value by adopting a PID control algorithm; then calculating a current value needing to be applied under the required rigidity by adopting a theoretical torsional rigidity formula; and adjusting the current to enable the joint to reach the required rigidity. Therefore, the joint and the control method achieve adjustment of the torsional rigidity of the rotational joint on the premise that a motor and an elastic element adjusting mechanism are omitted.

The invention provides an on-orbit inflatable inflatable satellite that can be inflated and expanded, comprising: a satellite core, a support body and a satellite shell, the satellite core is arranged at the center of the satellite shell, and the satellite core and the satellite shell are connected with support body. The satellite core contains the electronic components of the satellite, and the support body is composed of an inflatable expanded support tube. The upper surface outside the satellite shell is used to paste flexible solar cells to form a body-mounted solar cell array, and the lower surface outside the satellite shell uses shaping technology to form the shape of the antenna, and install antenna component modules to form a body-mounted antenna . The present invention adopts a substantially spherical inflatable unfolding structure, and there are no flexible structures such as large-scale long-arm solar panels and space-borne antennas after forming, thus greatly improving the overall structural rigidity of the satellite and improving the overall vibration fundamental frequency of the satellite. Compared with existing satellites, the fundamental frequency of vibration is increased by 5 to 10 times. The overall dynamic characteristics of the satellite have been improved, and the overall stability of the satellite has been improved.

The invention belongs to the technical field of wood floors, and in particular relates to an elastic floor and a production method thereof. The elastic floor comprises a floor substrate; and the surface of the floor substrate is coated with a high-elasticity UV paint layer which is formed by using large molecular weight flexible polymers and a large molecular weight active diluent as main film forming materials. The floor substrate is made of pure soft wood with a density between 0.35 and 0.55 or a medium and high density laminated plate with a density of 0.8. The production method for the elastic floor comprises the following steps: a) performing surface finish on the floor substrate; and b) coating the high-elasticity UV paint layer which is formed by using the large molecular weight flexible polymers and the large molecular weight active diluent as the main film forming materials. The elastic floor adopts the high-elasticity UV paint as finishing paint of the floor to prevent children from physical injuries because of falling, and has high elasticity after being coated with elastic pain despite that the substrate is made of the pure soft wood or the medium and high density plate.

A gas insulated metal enclosed switchgear is equipped with a bus-bar chamber, a circuit breaker chamber and a cable chamber, the bus-bar chamber is equipped with a pressure releasing window (A), and the circuit breaker chamber is equipped with a pressure releasing window (B). The pressure releasing windows (A and B) are both communicated with an upward pressure releasing channel, the pressure releasing channel is communicated with the atmosphere via a top cover pressure releasing hole, and a bus-bar chamber pressure releasing port is branched out of the top cover pressure releasing hole. A horn-like pressure releasing channel is arranged outside the bus-bar chamber pressure releasing window, and a first bending force reduction unidirectional opening enclosing device is arranged outside the circuit breaker chamber pressure releasing window. The cable chamber is equipped with a pressure releasing port, and the pressure releasing port passes a second bending force reduction unidirectional opening enclosing device and then is communicated with the pressure releasing channel. The structure of the enclosing devices is that a box or plate covers the pressure releasing window or the pressure releasing port, one edge of the box or plate is fixed, and a plurality of bending force reduction square hole grids which are parallel with the fixed edge are arranged on the plate surface inside the fixed edge. According to the gas insulated metal enclosed switchgear of the present invention, when an internal arc occurs, the mutually independent compartments of the switchgear and the adjacent switchgears operate independently and do not influence mutually, and the equipment are safe and reliable.

The invention discloses an outdoor terminal box for protecting internal electrical components. The outdoor terminal box comprises an outer box body, an inner box body and a mounting frame, wherein theinner box body is fixedly arranged in the outer box body; the mounting frame is arranged in the inner box body in a sliding manner; various electrical components are fixedly arranged on the mountingframe; a sliding rail device for the mounting frame for movement is fixedly arranged on the bottom surface in the inner box body; and two groups of symmetrical damping devices are fixedly arranged between the outer box body and the bottom surface of the inner box body. The outdoor terminal box is simple in structure and convenient to use, and normal use and maintenance of the internal components are also facilitated while the security of the internal electrical components of the terminal box is considered.

The invention solar energy controlled buoyancy automatically keep-balance helium-gas airship, which has a buoyancy device using air balloon lighter than air to generate buoyancy; a propulsion device, a manned or manned/luggage device, and a buoyancy control device. The invention at least has two groups of buoyancy gas containers-soft balloon or balloon-rigid balloon, while different balloon groups are connected by tubes; the tubes have been connected with pressure pump in series comprising inflator and charge/release valve; the invention uses the inflating balloon to generate buoyancy, while the buoyancy gas has different pressure and density distribution in different balloon groups via the function of inflating pump to realize the automatic control on the buoyancy; the buoyancy regulation is realized by adjusting the density and pressure distribution between each group of balloon via the electric control system; the invention has a adjust-flying airflow pump to realize automatic balance, while its outlets are distributed all around the aerobat via the outlet channels and branches. The invention has lower cost, environmental-friendly energy and better safety.

The invention discloses a precise near-net forming technology and device for a bevel gear shaft. The technology comprises the following steps of (a) precise saw cutting of a bar; (b) annealing treatment; (c) blank lubrication by adopting a high polymer lubricant; (d) conical blank preforming through cold heading: preliminarily preforming the blank according to a bevel angle of the bevel gear shaft and the shape of a shaft step and laying a foundation for next near-net forming of a bevel gear and a step shaft; (e) molybdenum disulfide lubrication: mixing molybdenum disulfide powder and engine oil at a ratio of (30-40wt%):(60-70wt%), coating the surface of the preformed blank with the prepared molybdenum disulfide and directly putting the preformed blank into a near-net forming die for molding; (f) precise near-net forming: forming the bevel gear shaft on a precise near-net forming device; (g) machining according to the requirements; and (h) forming of a product. The forming device comprises four parts, such as a set of combined bevel gear die, a set of combined step shaft die, a reinforcing plate and an ejector stopper.

The invention provides an arch auto-distress shockproof bed, belongs to the technical field of a shockproof device, and solves the technical problem that no auto-distress device is available in the prior art. The shockproof bed comprises a bed frame capable of being arranged on a floor; an extensible locating mechanism for locating a bed plate and the bed frame along the vertical direction is arranged between the edge of the bed plate and the bed frame; an arch protective cover is also arranged inside a hollow cavity at the middle part of the bed frame; a guide structure is arranged between the bed frame and the protective cover; a sliding block connection link mechanism is also arranged on the bed frame; the protective cover can move to the upper part of the bed plate through the sliding block connection link mechanism; and a power mechanism for providing power to the sliding block connection link mechanism is also arranged on the bed frame. The arch protective cover is covered above the bed plate, so that the personnel are protected by the protective cover. The arch protective cover has strong resistance on the impact from each direction due to a good stress structure. Therefore, the shockproof effect is improved.

The invention discloses an intervertebral disc prosthesis shock absorption structure, which comprises an upper terminal plate, a lower terminal plate and a ball pad, wherein the ball pad consists of a ball body and a connecting post, the ball surface is movably arranged in a ball-shaped groove of the lower terminal plate, the connecting post is movably clamped and buckled in a groove of the upper terminal plate, in addition, a first moving gap is formed in the groove of the upper terminal plate, a second moving gap is formed between the upper terminal plate and the end, far away from the ball surface, of the ball body, and an elastic structure is arranged between the ball pad and the upper terminal plate. The intervertebral disc prosthesis shock absorption structure has the advantages that the intervertebral disc prosthesis has the obvious shock absorption effect, the impact load generated when the human body moves is relieved, and the human body is protected from the injury due to insufficient human body buffer.

The invention relates to the field of metal processing, and discloses a multifunctional circular pipe metal cutting machine which comprises a base. A first rotating rod is rotatably connected to the interior of the base, a first gear is fixedly connected to the surface of the first rotating rod, and a second rotating rod is fixedly connected to the top end of the first rotating rod; and a foundation support is fixedly connected to the upper surface of the first rotating rod, a first stand column is fixedly connected to the top end of the base, a sliding strip is slidably connected into the first stand column, and a fixing block is fixedly connected to the side, close to the sliding strip, of the first stand column. By arranging a telescopic rod, a clamping plate, a rotating wheel, a connecting rod, the rotating rod and the sliding strip, a double clamping device is formed, metal pipes with different diameters can be clamped, the stable clamping effect can be well achieved, the situation that the metal pipes incline during cutting is avoided, the sections of the cut metal pipes are more perfect, and the practicability of the machine is enhanced.

The invention provides an in vitro temporary cardiac pacemaker with a measurement function. The in vitro temporary cardiac pacemaker includes a power supply, a power management system, a pacing measurement system, an input unit, a display unit and an electrode terminal, wherein the power supply is electrically connected with the power management system which is connected with the pacing measurement system; and the pacing measurement system includes a microcontroller, a pacing circuit, a sensing and measurement circuit, a defibrillation protection and EMI filter and a clock oscillation circuit.The microcontroller is connected with the pacing circuit, the sensing and measurement circuit and the clock oscillation circuit. The pacing circuit and the sensing and measurement circuit are connected with the defibrillation protection and EMI filter. The defibrillation protection and EMI filter interacts with the electrode terminal. The input unit is provided with an input interface, and the input interface is electrically connected with the power management system and the microcontroller. The display unit is electrically connected with the microcontroller. The in vitro temporary cardiac pacemaker with the measurement function can measure and display parameters such as a pacing threshold, myocardial impedance and P/R amplitude, to facilitate implantation of a pacing electrode and electrode fault monitoring.

The invention relates to a natural radiation-resistant biological extract composite which is composed of four natural biological extracts in percentage by weight: 60-95 wt% of tea polyphenol, 1-20 wt% of ganoderma lucidum polysaccharide, 2-20 wt% of spirulina polysaccharide and 2-20 wt% of ginkgo flavone. The composite components have the pure natural biological extracts with the same or similar functional group, and can produce the composite synergistic effect action so as to effectively adjust damaged cell apoptosis and inhibit damaged cell proliferation, thus obviously lowering electromagnetic radiation damage. The extract composite can participate in organism biochemistry metabolism, reduces omnipresent electromagnetic radiation damage in daily life, accelerates the reparative process of electromagnetic radiation damage and has the characteristics of safety and no toxicity or side effect. The invention has the advantages of convenient raw material obtaining, mature, simple and easy technology, convenient popularization and utilization and the like.

The invention discloses a gastroscope medicine applying device for a digestive system department. The gastroscope medicine applying device comprises a support rod, wherein the support rod is in a hollow structure; a partition plate is arranged in a hollow cavity; the support rod is divided into two parts, namely a handle lever and a medicine applying rod through the partition plate; a slide chute is formed in the surface of the tail end of the handle lever; a matched slide block is arranged on the slide chute in a sliding manner; one side of the slide block is located in the inner cavity of the handle lever; one end of the slide block in the inner cavity of the handle lever is connected with a steel connecting line; and the inner cavity of the medicine applying rod is divided into a lubricating cavity, a liquid medicine injection cavity and a mounting plate from left to right. According to the gastroscope medicine applying device for the digestive system department, through a lubricating agent in the lubricating cavity at the front end, when the slide block slides, the slide plate can slide in the inner cavity of the mounting plate through the steel connecting line and a reset spring; and a powder medicine can drop out from a powder medicine outlet, so that damages to a gastropore when the medicine is applied are well avoided.

The invention discloses an electronic device which comprises a housing. The housing comprises a metal body and a rubber body, wherein the metal body forms the shape of the housing and has pre-designed hardness, and the rubber body attaches to the outer surface of the metal body at least partially, serves as the bump buffering part of the electronic device and is used for protecting the electronic device. In the electronic device, the housing is provided with the metal body capable of forming the shape of the housing, and a basic function of forming the space accommodating electronic components of the electronic device is achieved. The electronic device is further provided with the rubber body attaching to the outer surface of the metal body at least partially, can serve as the bump buffering part of the electronic device, plays the protecting effect on the electronic device and facilitates electronic device prevention against damage caused by bump.