347results about How to "Avoid hard collision" patented technology

Aspects for achieving efficient data access to data elements in a relational database management system are provided. In a computer-implemented method aspect, the efficient data access occurs by establishing a hash table for data elements of a database in a predetermined continuous space of allocated storage, and optimizing utilization of the hash table during database query operations through linear hashing, wherein extension of the hash table occurs automatically to increase a number of pages in the hash table without discernible interruptions of data access to the data elements.

A barrier assembly includes first, second and third bodies that are vertically stacked. Each body includes a top surface and side surfaces. Inlet ports are formed within the top surfaces. Isolated chambers are formed within and are equidistantly spaced from a center of each body. The bodies include opposed ends that have serrations formed therewith that are interfitted for inhibiting lateral movement of the bodies during collision. The bodies also include indentations formed therein for receiving a user's hands or a fork lift arm, and assisting the user to transport the bodies. Reinforcement rods, formed from non-corrosive material, traverse through the bodies. At least one reinforcement rod is medially seated between the isolated compartments for counterbalancing a combined weight of the bodies. A connector rod is conjoined to the bodies such that the bodies are prohibited from disengaging while experiencing an impact force.

One embodiment of the present invention provides a system that hierarchically groups principals to facilitate collision warning. During operation, the system obtains information on a number of principals and constructs one or more first-level groups of principals. Within a first-level group, the system constructs one or more second-level groups, thereby facilitating an assessment of probability of collision between a second-level group and a primary principal.

An impact energy absorbing knee bolster system is basically provided with a lateral offset input restriction structure and a vertical offset input absorption structure. The lateral offset input restriction structure restricts a lateral offset input component of an impact load imparted by a passenger's knee against the knee bolster to lateral direction and promotes deformation of the knee bolster during a collision. The vertical offset input absorption structure absorbs a vertical offset input component of the impact load imparted by the passenger's knee against the knee bolster and to promote deformation of the knee bolster during the collision.

The invention discloses a novel electrostatic dust removing structure. The novel electrostatic dust removing structure is characterized by comprising a dust pre-removing area, an electric agglomeration area and a fine particle capturing area communicated in sequence, wherein one end, far from the electric agglomeration area, of the dust pre-removing area is communicated with a smoke discharge outlet for filtering dust particles with medium and large particle sizes; the dust particles enter the electric agglomeration area after passing through the dust pre-removing area; the electric agglomeration area agglomerates the dust particles with small particle size as larger dust particles; and after the larger dust particles enter the fine particle capturing area, the fine particle capturing area captures the larger dust particles. The novel electrostatic dust removing structure is provided with the electric agglomeration area and the fine particle capturing area for filtering and capturing the dust particles with small particle size, so that the smoke filtering effect is improved, and the pollution of smoke on the environment is further prevented.

A plurality of magnets are rotatably supported and when a ratio between revolution angle and rotation angle per unit time is set to 1:R, R is set to a value which is not less than 1 and not more than 5, and is not a common divisor of 360, so that the time variation of regions where a magnetic field (line of magnetic force) generated by the each magnet is orthogonal to an electric field is prevented from becoming monotonous. Further, the respective magnets are arranged to make the distances between the center of rotation and the center of revolution of the respective magnets different from each other, so that the regions where the magnetic field (line of magnetic force) generated by the each magnet is orthogonal to the electric field are dispersed in the radial direction of a target.

An object of the invention is to provide an exhaust emission control device which eliminates the use of a heat-retention structure using heat-insulating material such as glass wool so as to attain substantial lessening in production cost. A discharge end of a gas gathering chamber is connected to an entry end of a mixing pipe so as to encase the entry end of the mixing pipe and close an opened end face in a required spaced-apart relationship. Moreover, a side surface of the entry end of the mixing pipe adjacent to the discharge side of the particulate filter is formed with an opening; and gas guide passages are formed in the gas gathering chamber by guide fins for tangential introduction of all of the exhaust gas from the discharge side of the particulate filter to the opening. An extra space isolated from the gas guide passages is ensured in the gas gathering chamber as a heat-retention chamber surrounding the entry end of the mixing pipe.

A collision avoidance apparatus includes an obstacle detection section for detecting an obstacle, a collision avoidance section which performs collision avoidance assist control, and an avoidance processing start section for causing the collision avoidance section to start the collision avoidance assist control. In the case where the obstacle is a continuous obstacle, the timing of starting the collision avoidance assist control is delayed as compared with the case where the obstacle is not a continuous obstacle. Further, the greater the degree of gentleness of the inclination of the continuous obstacle, the greater the amount by which the timing of starting the collision avoidance assist control is delayed.

A method of operating a gas-filled collision cell in a mass spectrometer is provided. The collision cell has a longitudinal axis. Ions are caused to enter the collision cell. A trapping field is generated within the collision cell so as to trap the ions within a trapping volume of the collision cell, the trapping volume being defined by the trapping field and extending along the longitudinal axis. Trapped ions are processed in the collision cell and a DC potential gradient is provided, using an electrode arrangement, resulting in a non-zero electric field at all points along the axial length of the trapping volume so as to cause processed ions to exit the collision cell. The electric field along the axial length of the trapping volume has a standard deviation that is no greater than its mean value.

The invention discloses a sweeping robot, which comprises a robot main body, a first laser device and a second laser device, a camera and a controller, wherein the first laser device and the second laser device are respectively arranged on the robot main body; the first laser device and the second laser device respectively transmit a first laser beam and a second laser beam; the first laser beam is transmitted forwards in a horizontal direction, and the second laser beam is obliquely transmitted forwards in a mode of being downward relative to the horizontal direction; light beams, which are respectively perpendicular to corresponding transmission directions, are respectively formed by the first laser beam and the second laser beam; the camera is arranged on the robot main body; the controller is arranged on the robot main body; the first laser device and the second laser device as well as the camera are respectively connected to the controller and work under the control of the controller; and the camera can be used for catching laser images of the first laser beam and the second laser beam and can be used for transmitting to the laser images to the controller for image analysis and ranging. According to the embodiment of the invention, the sweeping robot is more comprehensive in detection range of obstacles and higher in detection precision, and the sweeping robot is capable of effectively relieving collision of the sweeping robot.

The invention belongs to the field of inorganic chemistry, and particularly relates to an efficient zinc phosphate micro-nano anticorrosion agent preparation method, wherein the product is applied in the field of metal heavy corrosion. According to the present invention, a cycle ultrasonic cavitation effect and a high-temperature high-pressure water bath thermal effect are adopted to perform synchronous and synergetic regulation to prepare the efficient zinc phosphate micro-nano anticorrosion agent, wherein the synchronous and synergetic effect of the two effects is adopted so as to make the product system be well dispersed, ensure the uniformity of crystal nucleation and effectively solve the difficult problem of difficult synchronous regulation on the particle size and the crystallization degree of the nanometer crystal, and a microwave heating mode is adopted to dry the product so as to reduce the agglomeration; the prepared micro-nano zinc phosphate product has advantages of high purity, complete crystallinity, narrow particle size distribution, good dispersion and the like, wherein the effective corrosion protection time of the zinc phosphate micro-nano anticorrosion agent is up to 1056 h and is far superior to the effective corrosion protection time of the commercially available zinc phosphate anticorrosion material; and the method has characteristics of simple process and low cost, and is suitable for large-scale production.

The present invention discloses a method for using pennisetum hydridum lignin for preparation of active carbon and application of the active carbon, the method comprises the following steps: hydrothermal coke can be prepared from the pennisetum hydridum lignin as a raw material by a hydrothermal method, the hydrothermal coke is impregnated with a solution of phosphoric acid, then the impregnated hydrothermal coke is put into a muffle furnace for carbonization, and finally the impregnated hydrothermal after the carbonization is activated by a hydrochloric acid solution, washed and dried to obtain the active carbon. The active carbon prepared from a pennisetum hydridum waste residue is just suitable for detoxification and decoloration of a hydrolyzate after pennisetum hydridum hydrolysis due to the pore size of the active carbon, and compared with the decolorization effect of purchased commodity active carbon, the decolorization effect of the active carbon is better.

The invention belongs to the oil well drilling field and particularly relates to a particle jet flow-based drill bit for impacting and breaking rocks. The drill bit comprises a drill bit body, a drill bit blade, a nozzle jacket, inner nozzles and cutting teeth. The internal upper part of the drill bit body is provided with a drill bit inner cavity. The bottom of the drill bit inner cavity is provided with a nozzle flow path in communication with the drill bit inner cavity. The bottom of the nozzle flow path passes through the drill bit body. The nozzle flow path comprises a nozzle upper flow path and a nozzle lower flow path. The inner nozzles are arranged in the nozzle lower flow path. The nozzle jacket is arranged between the inner nozzles and the nozzle lower flow path. The tail end of the nozzle jacket is exposed out of the bottom of the drill bit body. The drill bit body is internally provided with three inner nozzles and the diameters of the inner nozzles are differed in stages. According to the technical scheme of the invention, the rock breaking efficiency of the drill bit is effectively improved, and the mechanical drilling rate during the petroleum drilling process is increased. Meanwhile, the deflection of the drill bit during the well drilling process is avoided. By means of the special particle jet flow-based drill bit for impacting and breaking rocks, not only the mechanical drilling rate of a roller bit is increased, but also the well deflection is effectively prevented at the same time.

The invention discloses a relay type rapid chip taking and chip assembling device and a chip assembling machine employing the same. A first rotation arm is used for taking out a chip on a wafer and placing the chip on a transit table after rotation, a second rotation arm is used for taking out the chip on the transit table and placing the chip on a substrate after rotation, a welding head is used for taking out the chip and placing the chip and is arranged at one end of the first rotation arm and one end of the second rotation arm, the welding head moves in a reciprocating way along a direction parallel to a rotation shaft of the first rotation arm or the second rotation arm, and a driving device is used for driving the first rotation arm and/or the second rotation arm to rotate. The relay type rapid chip taking and chip assembling device has the beneficial effects that with the arrangement of the chip transit table, chip taking and chip assembling of the rotation arms can be synchronously performed; and remote chip taking and chip assembly is required, compared with a traditional chip taking and chip assembling mode employing a single rotation arm, the relay type rapid chip taking and chip assembling device has the advantages that the efficiency is improved by 50-70%, and the chip assembling accuracy is higher.

The invention discloses a method for quickly preparing a silicon dioxide/wood composite material. The method comprises the steps as follows: (1) pretreatment of wood; (2) preparation of a silicon-containing precursor solution; (3) impregnation of the wood with the silicon-containing precursor solution through ultrasonic vibration; (4) ageing; and (5) drying. According to the method, the quick impregnation of the wood with the silicon-containing precursor solution in a sol-gel method process is realized through the ultrasonic vibration, the production technology is simple and quick, a lot of time is saved, the manufacturing cost is low, the quality is stable, and most of nano silicon dioxide can be deposited on cell walls of the wood and cell cavities can be filled with part of the nano silicon dioxide in the form of gel in a short time; the heat stability, the hygroscopicity and the waterproofness of the wood are significantly improved while environmental characteristics of the wood are maintained to the maximum extent, and mechanical properties and the dimensional stability are greatly improved, so that the wood with the soft texture can be used for preparing interior decorations and furniture materials and has the broad development prospect.

The invention discloses a self-adaptive landing gear for a multi-rotor unmanned aerial vehicle. The self-adaptive landing gear comprises multiple legs; each leg comprises a joint driving device, a mechanical connecting rod and a buffering foot which are connected sequentially as well as a control system mounted on a vehicle body; each mechanical connecting rod comprises a thigh and a tibia; each joint driving device is connected between the corresponding thigh and the corresponding tibia; and each buffering foot comprises a micro force sensor and a spherical hinge which are connected sequentially. The self-adaptive landing gear for the multi-rotor unmanned aerial vehicle is based on the bionic concept and refers to the manners that flying insects stay in positions such as the ground, treesand the like, so that the landing gear has the higher flexibility and the higher intelligent level, and the defect that traditional multi-rotor aircrafts have relatively high requirements for landingenvironments is overcome.

A method of forming surface protrusions on an article, and the article with the protrusions attached. The article may be an Integrated Circuit (IC) chip, a test probe for the IC chip or any suitable substrate or nanostructure. The surface protrusions are electroplated to a template or mold wafer, transferred to the article and easily separated from the template wafer. Thus, the attached protrusions may be, e.g., micro-bumps or micro pillars on an IC chip or substrate, test probes on a probe head, or one or more cantilevered membranes in a micro-machine or micro-sensor or other micro-electro-mechanical systems (MEMS) formed without undercutting the MEMS structure.

The invention discloses an energy dissipation node of a prefabricated assembly concrete structure. The energy dissipation node comprises a prefabricated reinforced concrete column and a prefabricatedreinforced concrete beam which are connected at a right angle, and an energy dissipation angle brace is connected at an oblique angle between the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam; the energy dissipation node is specifically characterized in that the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam are connected at the right angle and the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam are connected with the energy dissipation angle brace at the oblique angle through embedded parts on the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam. The energy dissipation node of the prefabricated assembly concrete structure has thecharacteristics of strong energy dissipation capacity, good ductility and good shock absorption effect, and meanwhile, the beam-column collision can be avoided; moreover, the construction is simple and convenient, easy to realize, low in cost, small in occupied building space, the using efficiency of the building space is not affected. The new technology can be widely used in assembled integratedframe structures and has a wide engineering application prospect.