358 results about "Straight path" patented technology

A trailer backup assist system for a vehicle reversing a trailer is provided herein. The system includes a steering input device for controlling a desired curvature. A controller is in communication with the steering input device and is configured to generate steering command for the vehicle to guide the vehicle and trailer onto a straight path when a straight backup request is initiated via the steering input device.

A medical probe comprises a probe shaft having proximal and distal shaft portions, and an operative element, such as a tissue removal element, associated with the distal shaft portion. The proximal and distal shaft portions can be positioned relative to each other in an axially aligned relationship and an axially non-aligned relationship at the interface between the shaft portions. For example, the ends of the shaft portions that engage each other can be beveled, in which case, relative rotation of the shaft portions will cause the angle between the portions to vary. Or, the shaft portions can hinge relative to each other to vary the angle between them. Thus, it can be appreciated that the probe can be introduced along a straight path via a small opening within the patient, and then the probe shaft portions can be moved relative to each other to reach off-axis tissue. The probe may have a drive shaft that extends within the probe shaft and on which the operative element is mounted. The drive shaft may have proximal and distal rigid shaft portions and a linkage between the drive shaft portions, so that the drive shaft can bend when the probe shaft portions are placed in their axially non-aligned relationship.

The inventive ablation element comprises an elongated cannula having a proximal end and a distal end. The cannula defines an internal lumen within the cannula and a cannula axis. A plurality of conductors contained within the lumen, each of the conductors has a proximal end proximate the proximal end of the cannula, and a distal end proximate the distal end of the cannula. A plurality of ablation stylets each has a proximal end and a distal end, and each coupled at the respective proximal end of the stylet to the distal end of a respective conductor, the stylets comprise a deflectable material, the conductors together with their respective stylets being mounted for axial movement. A trocar point defined proximate the distal end of the cannula. A deflection surface positioned between the trocar point and the proximal end of the cannula, the deflection surface being configured and positioned to deflect, in response to axial movement of the stylets in a direction from the proximate end of the cannula to the distal end of the cannula, at least some of the stylets laterally with respect to the cannula axis in different directions along substantially straight paths, the paths defining an ablation volume.

A system for determining an angular position of a steerable wheel of a vehicle can include a plurality of sensors and a controller in electrical communication with each of these sensors. The controller can be configured to compare a first data set and a second data set to respective straight path conditions, wherein the first data set includes data from a first set of the sensors and the second data includes data from a second set of the sensors. The controller can be configured to determine a substantially straight path of travel condition when the comparison of at least one of the first data set and the second data set satisfies the respective straight path conditions, and can then associate that data acquired from the steering angle sensor(s) with a neutral position.

The inventive ablation element comprises an elongated cannula having a proximal end and a distal end. The cannula defines an internal lumen within the cannula and a cannula axis. A plurality of conductors contained within the lumen, each of the conductors has a proximal end proximate the proximal end of the cannula, and a distal end proximate the distal end of the cannula. A plurality of ablation stylets each has a proximal end and a distal end, and each coupled at the respective proximal end of the stylet to the distal end of a respective conductor, the stylets comprise a deflectable material, the conductors together with their respective stylets being mounted for axial movement. A trocar point defined proximate the distal end of the cannula. A deflection surface positioned between the trocar point and the proximal end of the cannula, the deflection surface being configured and positioned to deflect, in response to axial movement of the stylets in a direction from the proximate end of the cannula to the distal end of the cannula, at least some of the stylets laterally with respect to the cannula axis in different directions along substantially straight paths, the paths defining an ablation volume.

An arrangement for delivering gasses from can combustors of a can annular gas turbine combustion engine to a turbine first stage section including a first row of turbine blades, the arrangement including a flow-directing structure for each combustor, wherein each flow-directing structure includes a straight path and an annular chamber end, wherein the annular chamber ends together define an annular chamber for delivering the gas flow to the turbine first stage section, wherein gasses flow from respective combustors, through respective straight paths, and into the annular chamber as respective straight gas flows, and wherein the annular chamber is configured to unite the respective straight gas flows along respective shear planes to form a singular annular gas flow, and wherein the annular chamber is configured to impart circumferential motion to the singular annular gas flow before the singular annular gas flow exits the annular chamber to the first row of blades.

A network switch chassis provides a linear, front-to-rear air flow path for cooling first and second orthogonally oriented arrays of parallel circuit boards connected by a midplane. Air is drawn into the front of the chassis and passes in a straight path over the first array of circuit boards, through air openings in the midplane, over the second array of circuit boards, and out the rear of the chassis. Resilience against service interruption due to fan failure is achieved with multiple fans cooling each circuit board.

An elongate tubular lighting assembly having a body with a length between spaced first and second ends. The tubular lighting assembly has a source of illumination and first and second connectors respectively at the first and second body ends. The first connector has cooperating first and second parts having first and second surfaces. The first and second connector parts are configured so that the first and second surfaces are placed in confronting relationship to prevent separation of the first and second connector parts with the body in an operative state as an incident of the first connector part moving relative to the second connector part from a position fully separated from the second connector part in a substantially straight path that is transverse to the length of the body into an engaged position.

The invention discloses a motion planning and controlling method for a tractor-trailer mobile robot in a complex environment. The method includes the steps: a) defining initial and terminal configurations; b) detecting obstacles obs<k>(x<k>, y<k>, cer<k>) by a sonar sensor; c) rejecting the obstacles with confidence coefficient cer<k> smaller than delta; d) defining an obstacle space OBS; e) generating a region Rgn<1>=(obs<k>); f) judging whether the obstacles belong to the space Rgn<j>, j=1, 2, ...n; g) judging whether the obstacle space is built or not; h) building bidirectional search random trees Tree_H and Tree_G; i) randomly generating a configuration X<rand>; j) acquiring new configurations X<new_H> and X<new_G>; k) judging whether the trees Tree_H and Tree_G are connected or not; l) fitting straight paths; m) controlling motion; n) judging whether new obstacles exist or not. The motion path planning and controlling method for the tractor-trailer mobile robot in the complex environment is scientific, reasonable and complete, and lays a theoretical foundation for researching running of the unmanned tractor-trailer mobile robot in the environment with the obstacles.

A dual-ended applicator is provided. The applicator includes a handle, a first roller having a broad concave surface at one end of the handle, and a second, ball-like roller having a convex surface, at the opposite end of the handle. The first roller, having a greater axial length and surface area than does the second roller is intended for applying a cosmetic to broader convex areas of the skin. The second roller, having a lesser axial dimension and surface area as compared with the first roller is intended for distributing a cosmetic to the narrower, concave areas of the skin. The first roller is mounted on the applicator so as to rotate about a fixed axis lateral to the longitudinal axis of the applicator, and will move in straight paths along the skin, in line with the longitudinal axis of the applicator. The second, ball-like roller is mounted on the applicator so as to travel along both straight and curved paths, automatically adjusting between positions as the applicator is moved along the skin surface.

The inventive ablation element comprises an elongated cannula having a proximal end and a distal end. The cannula defines an internal lumen within the cannula and a cannula axis. A plurality of conductors contained within the lumen, each of the conductors has a proximal end proximate the proximal end of the cannula, and a distal end proximate the distal end of the cannula. A plurality of ablation stylets each has a proximal end and a distal end, and each coupled at the respective proximal end of the stylet to the distal end of a respective conductor, the stylets comprise a deflectable material, the conductors together with their respective stylets being mounted for axial movement. A trocar point defined proximate the distal end of the cannula. A deflection surface positioned between the trocar point and the proximal end of the cannula, the deflection surface being configured and positioned to deflect, in response to axial movement of the stylets in a direction from the proximate end of the cannula to the distal end of the cannula, at least some of the stylets laterally with respect to the cannula axis in different directions along substantially straight paths, the paths defining an ablation volume.

A control method of a robot cleaner for traveling to clean includes checking information about a predetermined traveling pattern; determining a traveling trajectory based on a traveling speed; generating a traveling pattern based on the determined traveling trajectory and the information about the predetermined traveling pattern, wherein the traveling pattern includes a first straight path, a first rotation path connected to the first straight path and for rotation in a first direction, a second straight path connected to the first rotation path, and a second rotation path connected to the second straight path and for rotation in a second direction; and repeatedly traveling along the generated traveling pattern at regular intervals. Therefore, since the robot cleaner performs cleaning without scattering dust, the efficiency of cleaning may be improved.

The invention is applicable to the technical field of pilotless driving and provides a path tracking method for a pilotless automobile. According to the method, the pilotless automobile is subjected to differential positioning by virtue of a high-precision satellite. The path tracking method comprises a straight path tracking method or a turning path tracking method. The straight path tracking method comprises the step of driving based on a distance deviation between a current position of the pilotless automobile and an expected straight path and a deviation between a course angle and an expected course angle of the pilotless automobile. The turning path tracking method comprises the step of carrying out turning driving based on a deviation distance from a current position of the pilotless automobile to a turning point and a deviation between a driving direction and a turning direction of the pilotless automobile. The path tracking method provided by the embodiment of the invention has the beneficial effects that a principle and a calculation process are simple, the calculated amount is small, and the method is easily realized in an embedded system; and besides, the combination of the high-precision satellite and a path tracking algorithm is realized in the embedded system, so that the path tracking accuracy is increased.

An offline programming device in which a path for preventing interference may be automatically inserted such that a welding robot does not interfere with a jig clamping a workpiece to be welded. The models of the robot, the workpiece and the clamp jig are indicated on a display for determining the path for preventing interference. A simulation is carried out to judge that interference with the jig may occur. When it is judged that interference will occur, data of the preventing path suitable for a straight path passing through the jig are read out from a library including registered preventing paths corresponding to shapes of various jigs. The data of the preventing path includes the three-dimensional data of each point of the path as the incremental value in relation to a reference point of the path. Also, the orientation of a welding torch is registered. The corrected welding program may be downloaded to the actual robot so as to correct the uploaded offline program by using a test result in the actual robot.

The inventive ablation element comprises an elongated cannula having a proximal end and a distal end. The cannula defines an internal lumen within the cannula and a cannula axis. A plurality of conductors contained within the lumen, each of the conductors has a proximal end proximate the proximal end of the cannula, and a distal end proximate the distal end of the cannula. A plurality of ablation stylets each has a proximal end and a distal end, and each coupled at the respective proximal end of the stylet to the distal end of a respective conductor, the stylets comprise a deflectable material, the conductors together with their respective stylets being mounted for axial movement. A trocar point defined proximate the distal end of the cannula. A deflection surface positioned between the trocar point and the proximal end of the cannula, the deflection surface being configured and positioned to deflect, in response to axial movement of the stylets in a direction from the proximate end of the cannula to the distal end of the cannula, at least some of the stylets laterally with respect to the cannula axis in different directions along substantially straight paths, the paths defining an ablation volume.

The invention provides a launch and withdraw device of an unmanned aerial vehicle and a method for the launch and withdraw device, and the device comprises a base, wherein the base is connected with a support platform through a support frame; an angle adjustment mechanism is further arranged between the base and the support platform; the support platform is slidingly provided with a withdraw platform and a catapult platform; the catapult platform comprises a second connecting plate; a groove is formed in the second connecting plate; a clamping plate is slidingly connected onto the second connecting plate; a hole is formed in the second connecting plate; an elastic rope passes through the hole to be fixedly connected onto the support platform; the withdraw platform comprises a lower jaw and an upper jaw; the upper jaw is arranged at the upper part of the lower jaw; the upper jaw is provided with a flexible buffer strip; the end, close to the catapult platform, of the lower part of the lower jaw is provided with a hook; the lower jaw is internally provided with a recovery rack; the recovery rack is provided with an unmanned aerial vehicle attitude adjustment mechanism and an unmanned aerial vehicle pushing mechanism; a wedge-shaped block is arranged on the end, close to the catapult platform, of the support platform; a cam corresponding to the hook is arranged on the end, far away from the catapult platform, of the support platform. By adopting the launch and withdraw device of the unmanned aerial vehicle, straight path launch can be realized, the catapult launch efficiency is high, a withdraw process is accurate and stable, and the launch and the withdraw can be realized at the same time.

A method and device for handling an elongate strength member. In the method, an elongate strength member with a plurality of elongate composite rods, or metal wires or plastic fibers are bundled together with the composite rods, or metal wires, or plastic fibers in a generally parallel and untwisted and un-spiraled arrangement when the elongate strength member is extended along a generally straight path, wherein the composite rods are longitudinally and rotatably moveable relative to each other. It is then twisted relative to a longitudinal dimension of the elongate strength member and the path of the elongate strength member is curved, such as by coiling.

Being applicable to the field of positioning technology, the invention provides an indoor robot obstacle avoidance method, a device and a navigation system. The method includes: in a process of proceeding toward a target in a straight path, with real-time two wheels' speeds acquired by a drive wheel rotation speed sensor, using a differential driving model to acquire a coordinate variation amount and a direction angle variation amount of the two wheels' central point in unit time, accumulating the coordinate variation amount and the direction angle variation amount in unit time to acquire a real-time position and a direction angle, wherein the direction angle is an included angle between the motion direction and the X-axis positive direction; when an obstacle or danger zone is monitored through an obstacle sensor, bypassing the obstacle or danger zone in a left direction or right direction from the current real-time position, and after avoidance, then further letting the robot proceed in a straight path. The method, device and navigation system provided by the invention realizes low cost and high precision positioning and obstacle avoidance indoors.

The invention discloses a network for realizing page push and control, a page push method and a page control method. A page push server connected in a bypass is arranged in the network; and the page push method and the page control method are realized by bypass equipment in the network. In the invention, the complicated operation of page push is extracted as specialized equipment by the network and the method, thereby realizing a page push function and a behaviour control and protection function in the bypass, reducing the implementation complexity of the network straight-path equipment, improving the performance of the whole transmission network and reducing the deploy risk and cost of page push business.

The invention discloses a variable-ship-length-rate-based crosswind-resistant straight path tracking method of an unmanned surface vessel. In view of different influences on path tracking by different ship length rates, a variable-ship-length-rate-based straight path tracking method is put forward based on combination with fuzzy control. The range deviation and a changing rate of the range deviation are used as inputs of a fuzzy controller and the ship length rate is used as the output of the fuzzy controller; the ship length rate is adjusted dynamically, thereby adjusting a course angle to adjust LOS-principle-based input and output parameters of a PD controller of a tracking expected course angle alpha fai. Voltages of motors at the left side and the right side of the unmanned surface vessel are controlled, thereby realizing straight path tracking of the unmanned surface vessel in a water-surface crosswind environment. Besides, with a course correction and error compensation method, static error occurrence caused by path tracking in a crosswind environment is reduced and a straight path tracking effect of the unmanned surface vessel in an anti-interference environment is improved.

An applicator device for a fluid, gel-like, pasty or powder product comprising a storage compartment in which the product is accommodated in free form, and an outlet for the product. A barrier is provided which in at least one operating condition at least partially blocks a straight path for the product from the storage compartment to the outlet.

The invention discloses a path sweeping method, a path sweeping device and a path sweeping system of a sweeping robot, and relates to the technical field of robots. The method comprises the following steps: acquiring a yaw angle of the sweeping robot in real time, and controlling a sweeping path of the sweeping robot according to the yaw angle so as to enable the sweeping robot to sweep the path according to an arch-shaped path. The path sweeping method controls the sweeping path of the sweeping robot according to the yaw angle so as to enable the sweeping robot to sweep the path according to the arch-shaped path, so that the problems that the sweeping robot cannot walk along a straight path when performing arch-shaped sweeping with speed measurement coded discs on left and right walking wheels and the arch-shaped path fails when the sweeping robot meets with an obstacle are solved.

A conveying device with a diverter having a curved path for conveying lightweight unstable articles, such as plastic bottles having a neck portion with a neck ring thereon. The unstable articles are conveyed along a first path to different ones of plural second paths through a third path at the diverter with the third path having first and second ends alignable with the first path and different ones of the plural second paths and a middle portion maintained in a curved configuration that is varied during aligning movement of the second end. A controller controls the aligning movement of the second end, preferably along a straight path, and the unstable articles are supported by engaging members in actuating guides to urge the unstable articles along the article paths.

An apparatus for sampling ambient air to obtain coarse and fine fractions of particulate matter includes a single acceleration tube and a collection tube coaxially arranged along a central axis with a gap between facing distal ends thereof within a range of d / D1 of 1 to 2, wherein d is the distance or gap between the distal ends and D1 is the inside diameter of the outlet at the distal end of the acceleration tube. A housing surrounding the acceleration and concentration tubes is provided with a side-wall nozzle connected to a suction device for drawing a major portion of the sampled ambient air therethrough and for separation of particulate matter, as a fine fraction, from that major portion. A second suction device draws a minor portion of the sampled ambient air, containing the coarse fraction of the particulate matter, in a straight path approximating the central axis, through the acceleration tube and through the collection tube for passage through a filter for separation of the coarse fraction of particulate matter. The ratio of the flow rates of the major and minor portions of the sampled ambient air is adjusted to provide a cutpoint within the range of 2-3 microns. The apparatus is preferably operated with a flow rate for the sampled ambient air within the range of 900-1200 liters per minute.