160results about How to "Reduce the impact of collision" patented technology

The invention provides a UUV dynamic obstacle avoidance method based on a speed obstruction method and relates to a UUV dynamic obstacle avoidance method which solves the problem that an existing UUV route planning method is poor in accuracy when avoiding moving obstacles. According to the method, movement uncertainty of obstacles is converted into position uncertainty; according to movement uncertainty of the obstacles, the minimum safety angle alpha 1 and the maximum safety angle alpha 2 are obtained; the comprehensive speed danger degree, caused by the obstacles, of a UUV is obtained, , speed space of UUV movement is determined according to UUV dynamics constraint rule, and according to position uncertainty of the obstacles and the largest action range of the obstacles, the minimum collision time of the UUV and all the obstacles is obtained; by means of the comprehensive speed danger degree of the UUV and the minimum collision time between the UUV and all the obstacles, an optimized target route function of the UUV is obtained; by means of the speed obstruction method, the minimum value point of the target function is found to serve as the next way point of UUV movement, and a UUV movement path is planned. The UUV dynamic obstacle avoidance method is suitable for UUV dynamic obstacle avoidance.

A bridge damping blocking tenon device can satisfy the horizontal lateral-pushing resisting rigidity of a bridge body under normal service condition of vertical direction, crosswise direction and longitudinal direction under normal impact load, and further can consume energy in the vertical direction, so as to effectively improve the earthquake resistance of a bridge. The bridge damping blocking tenon device comprises a sleeve, elastic steel plates and a damping blocking tenon; the damping blocking tenon comprises a lower conical column structure section and an upper rectangular structure section; the upper parts of the upper rectangular structure section and the lower conical column structure section are arranged in the rectangular inner cavity of the sleeve; the semi-lunar elastic steel plates are arranged on two sides of the upper part of the lower conical column structure section in the transverse direction of the bridge, the upper ends of the elastic steel plates are blocked in the intersection part of the upper rectangular structure section and the lower conical column structure section, and the lower ends of the elastic steel plates are blocked between the bottom surface of the rectangular inner cavity of the sleeve and the lower conical column structure section. The side wall of the sleeve is fixedly connected to a base plate and is connected with the transverse side wall of the bridge body by high-strength bolt assemblies. The lower end of the lower conical column structure section is fixedly connected with a mounting base and is fixedly connected with a pier stud by high-strength bolt assemblies.

The invention discloses an installation device for an offshore wind generating set. The installation device comprises a positioning mechanism, a fan, a six-dimensional parallel mechanism, a tower pedestal platform and a crane ship; the six-dimensional parallel mechanism is fixed on the tower pedestal platform through the positioning mechanism; the fan penetrates through the six-dimensional parallel mechanism and is fixed through the six-dimensional parallel mechanism; and the crane ship is connected with a fixing mechanism. The six-dimensional parallel mechanism with three working units is adopted in the installation device and does not have a working dead angle, so that deflection of positive deviation and negative deviation of a fan tower cylinder can be realized, and bolt holes in a bolt hole cylinder tower pedestal on fan tower cylinder flanges are quickly aligned. The six-dimensional parallel mechanism can play a role in buffering when the fan tower cylinder declines, so that collision impact between the fan tower cylinder and the tower pedestal is reduced. The six-dimensional parallel mechanism has a series of advantages of high rigidity, high speed, high bearing capacity, small errors, high precision, good power performance and the like and is easy to control, so that positioning and buffering integration of the fan tower cylinder can be realized, and the manufacturing cost is greatly reduced.

When detecting suction of a lighted object such as a cigarette or a match, a self-propelling cleaner 1 sends it to a dust room 12a by controlling a valve 8a. The self-propelling cleaner 1 collects ordinary dust such as dust and wastepaper into a dust room 12b by controlling the valve 8a. Since a lighted object such as a cigarette and ordinary dust are thus sent to two different dust rooms in a discriminated manner, even if a lighted object such as a cigarette is sucked other dust in the dust room can be prevented from catching fire from it, whereby the self-propelling cleaner is made safer from suction of a lighted object.

Disclosed is a waste gate assembly for a turbocharger that is provided at a side of a turbine into which an exhaust gas is introduced, and bypasses some of the exhaust gas introduced into the turbine to an outside. The waste gate assembly may include a boss that has a hole for discharging the exhaust gas and is provided at a waste gate main body, a valve that is provided to spherically come in contact with a valve mounting surface of the boss and selectively opens or closes the hole of the boss, and an actuator that is connected to the valve, and provides a rotational force to the valve.

A method and apparatus are provided for transmitting data packets in a communication network using a plurality of radio channels. The network is organized into a plurality of communication layers including a data link layer MAC and a physical layer PHY. The method includes aggregating data packets to be transmitted to a single recipient, in the MAC layer, outputting at least two aggregated packets, with which a single header of the PHY layer is associated. At least two of the radio channels are concatenated to form a concatenated channel. The aggregated packets are simultaneously transmitted respectively over at least two separate concatenated sub-channels, one concatenated sub-channel including at least one of the radio channels of the concatenated channel.

The present invention provides an air suction device for a threading apparatus that creates an air flow to be directed toward a needle eye in order to guide a yarn through the eye. The air suction device is comprised of: (a) an air device externally provided for generating reduced pressure; (b) an air suction pipe connected to the external air device; and (c) an air path leading to a front portion of the air suction pipe. The air path is comprised of a pair of leaf springs to horizontally hold a needle, and upper and lower elastic members which run parallel between the pair of leaf springs. To effectively direct air into the needle eye, an air-tight environment is provided around the needle eye: (1) air entry above and beneath the needle eye is prevented by the body of the needle; (2) air entry from both sides of the needle is prevented by the pair of leaf springs that hold the needle; and (3) air inflow behind the needle is prevented by rear-positioned elastic members which tightly fit the needle.

The vane for a wind energy installation is equipped with collecting devices and comprises at least two parts so that a hollow space is formed, in which devices are placed for collection of dust, particles or loose objects. The collecting dvices consist of a container with a funnel-shaped opening, with a valve or adhesive surfaces on the inside. The devices may also be a kind of filter positioned between chambers inside the vane.

An impact relieving device includes an impact portion and a fixed portion. The impact relieving device has an integral structure that is formed by one-step extrusion molding. The impact portion includes an inner layer and an outer layer. The inner layer and the outer layer are separated by a separation rib to form a cavity. The outer layer of the impact portion is arc-shaped, and an arc surface protrudes outwards. The impact relieving device has low manufacturing cost, is easy to manufacture and install, has a simple structure, and can effectively relieve an impact force.

A cushioning member between plate bodies of a mass body and at end portions, in the circumferential direction, so as not to rotate relative to the plate bodies. The peripheral edges, on both sides in the width direction, of the outer peripheral surfaces of the cushioning member's first and second side portions abutting against a support member, along with swing of the mass body, are chamfered, reducing the possibility that the cushioning member enters in a clearance between the side surfaces of the support member and the plate bodies when the cushioning members' first side portion and the support member abut, or when the cushioning member's second side portion and the support member abut, along with swing of the mass body, suppressing damage to the cushioning member.

The invention discloses a mounting device for an offshore wind generating set based on six-dimensional intelligent mechanical legs. The mounting device comprises a large crane ship, fine positioning buffer system, a fixing mechanism and a tower footing platform, the crane ship floats on the sea, a lifting system of the crane ship is rotatably connected with a translational system of the crane ship, and the crane ship controls the position of a fan through a steel wire rope. The upper end of each six-dimensional intelligent mechanical leg of the fine positioning buffer system is hinged with a flat plate and is fixedly connected with a fixing truss, the lower end of the fixing flat plate is hinged with a cylindrical pin, the cylindrical pin is fixedly connected with a small cylinder, and the small cylinder and a positioning cylinder 1 are concentric. A fan tower is positioned by the aid of the six parallel six-dimensional intelligent mechanical legs, and the position of the fan tower is controlled by the aid of a video sensor, so that the fan tower is rapidly and accurately mounted by the aid of the crane ship, collision is avoided in the mounting process, and time and mounting cost are greatly saved.

The invention discloses an anti-collision protection machine capable of automatically alarming for a ship. The anti-collision protection machine comprises a working box and a fixing plate fixedly connected to the left end face of the working box, bolts capable of fixing the fixing plate to the front side of a ship body are symmetrically arranged on the upper side and the lower side of the fixing plate, a first cavity with a forward opening is fixedly formed in the fixing plate, and a fixing block is fixedly arranged on the front end face of the fixing plate. The ship can be protected when theship collides, a signal device can unfold an anti-collision plate when the collision occurs, the collision contact area is increased to reduce the impact force, a signal can be transmitted to an alarmdevice, a knocking block knocks an alarm bell to give an alarm, a power device can push an air bag out to make contact with the outside, gas in the air bag is rapidly expanded by light, and the air bag is expanded to reduce the collision impact force.

The invention discloses a three-degree-of-freedom wave energy float power generation device and power generation method. According to the three-degree-of-freedom wave energy float power generation device, three power generation units are arranged corresponding to heaving, surging and rolling degrees of freedom, reciprocating wave energy on the degrees of freedom can be captured and is converted into unidirectional output of a generator through the power generation units, parallel connection of the plurality of degrees of freedom and overlay utilization of corresponding energy are achieved, andrelatively high benefits are achieved; and resonance springs are arranged at the two ends of horizontal rods and vertical motion rods, collision impact force can be reduced, return motion of a floatis facilitated, and motion of the float in directions of the degrees of freedom is more continuous due to a simple harmonic motion effect under the action of intermittent waves.

At a front-end side opposite to a head-fixing-member-attachment side, a protection member has an inclined plane sloped up from a head side toward the opposite outer side in a direction in which liquid ejecting heads are arranged in a row. The surface of the front end is located at a position that is not closer to a head-fixing member in comparison with the nozzle surface of each of the liquid ejecting heads attached to the head-fixing member or level therewith. A recess is formed at a part of the inclined plane. In a state in which one of the caps faces the protection member and, in addition, each of the remaining caps is in contact with the nozzle surface of the liquid ejecting head, a part of the cap facing the protection member is in the recess, which ensures that the cap is not in contact with the protection member.

The invention is suitable for the field of dish washing machines and discloses a dish washing machine guide rail retaining block, a dish washing machine guide limiting structure and a dish washing machine. The dish washing machine guide rail retaining block comprises a rigid retaining block body, a first connecting structure and an elastic buffering structure, the first connecting structure is arranged on the rigid retaining block body and used for being in fastened connection with a guide rail, the elastic buffering structure is arranged on the rigid retaining block body and used for being in abutted limitation with a guide limiting wheel, the rigid retaining block body comprises a clamping insertion portion slidably clamped and inserted into a sliding groove of the guide rail, and a clamping portion clamped outside the sliding groove, and the elastic buffering structure is arranged on an end face, away from the clamping portion, of the clamping insertion portion. The elastic buffering structure is arranged on the rigid retaining block body additionally, so that impact force between the dish washing machine guide rail retaining block and the guide limiting wheel is buffered effectively, impact sound generated by collision of the dish washing machine guide rail retaining block and the guide limiting wheel is reduced, comfortability when a user uses the dish washing machine guide rail retaining block is improved, and using safety and reliability and easiness in use of the dish washing machine guide rail retaining block are improved.

The invention provides a vacuum online feeding device of a positive pressure system. The vacuum online feeding device comprises a conical feeding copper, an electrically operated valve, a vacuum generating device and a material buffering device. The vacuum online feeding device is characterized in that the conical feeding copper and the vacuum generating device are connected with the electrically operated valve through flanges; a long pipe of the vacuum generating device is composed of a vertical pipe and an inclined pipe, and the included angle between the vertical pipe and the inclined pipe is 45 degrees; two identical compressed air inlet pipes with small calibers are symmetrically arranged on the two sides of the inclined pipe, and the included angles between the axes of two compressed air inlet pipes and the axis of the inclined pipe are 18 degrees to 20 degrees. The two compressed air inlet pipelines are connected with a main air inlet pipe through a tee joint and are symmetrically distributed on the two sides of the axis of the tee joint, and therefore compressed air entering the two air inlet pipes is equal in flow. The material buffering device is welded to a material outlet of the vacuum generating device, through a rubber plate buffering baffle arranged on the material buffering device, part of energy of materials impacting a buffer cushion can be absorbed, the falling direction of the materials is changed, and the situation that equipment is damaged due to the fact that the materials directly collide with other parts in an equipment body is avoided.

The invention belongs to the technical field of commodities, discloses a simple door stopper, and solves the problems of higher collision impact between a magnetic part and an absorbing part, higher damage to the door stopper and high noise during door closing in a general permanent magnet door stopper. The simpler door stopper comprises a clamping jaw and a clamping ball; the clamping jaw is fixed on a clamping jaw base; the clamping ball is fixed on a clamping ball base; an elastic buffer part is arranged on the clamping jaw base; and absorbing surfaces of the clamping ball and the clampingjaw base are planes. Through arrangement of the elastic buffer part, the collision impact between door stopper parts during contacting can be reduced, the noise is lowered, the door stopper is protected, and the service life of the door stopper is prolonged; the absorbing surfaces are the planes to achieve firmer absorption; and the clamping jaw achieves a reinforcing effect, so that the desorption difficulty of the door stopper is increased.

The invention discloses a passive anti-collision damping multi-rotor drone. Multiple engine arms of same structures are evenly arranged on a baseboard in a concyclic mode, according to the structure of each engine arm, a bearing base is fixed to the baseboard through bolts, a linear bearing is installed in the bearing base, an inner end of a carbon rod penetrates through the linear bearing, the carbon rod is arranged on the linear bearing in a sliding mode, a motor base is fixedly connected with an outer end of the carbon rod, a motor is installed on the motor base, a rotor are installed on amotor shaft, the carbon rod is sleeved with a spring, and the spring abuts between the bearing base and the motor base. The passive anti-collision damping multi-rotor drone has the following characters that the structure is simple, and the whole drone is light in weight; collision can be effectively resisted, and a damping effect is good; after being collided, the passive anti-collision damping multi-rotor drone can fast restore an initial state, so that flying of the drone is safer and more reliable.