101 results about "Shortest distance" patented technology

A radar device which is installed in a vehicle or the like needs to detect a target at a short distance from several tens of centimeters to several tens of meters and, therefore, has a problem that a reflected wave from the target may be reflected by a front case of the radar device and then reflected by the target again to be received as a secondary echo by itself. To solve this problem, it is an object of the present invention to provide a radar device again that can prevent multi-reflection to accurately measure a distance to a target in a short range. In a radar device according to the present invention, a surface of a frame body provided around a transmitting antenna and a receiving antenna is shaped so that a reflected wave from a target may not be returned in a direction in which a transmitting wave is transmitted from the transmitting antenna.

The invention discloses a low-computing-power dynamic obstacle avoidance method based on single 2D laser radar data. The method comprises the following steps: 1, collecting and preprocessing laser radar data; 2, modeling an obstacle in the environment, converting the laser point cloud data into the position and shape of the obstacle, performing local path planning with the minimum path width through an incremental local path planning algorithm, dynamically adjusting the local path according to the real-time laser point cloud data, and obtaining the position and shape of the obstacle; only calculating a path through which the equipment can pass through the obstacle and reach the end point at the current moment each time; and 3, defining a cost function considering the path length, the distance from the path point to the obstacle, the turning angle and the equipment size, obtaining the obstacle information according to the real-time laser point cloud data, calculating the shortest distance between the current path and the obstacle, and if the shortest distance is smaller than a safety threshold, adjusting the weight coefficient of the cost function, and locally optimizing the path. According to the method, the path planning performance under a low-computing-power platform is improved, and equipment can efficiently and dynamically avoid obstacles in real time.

The invention relates to the technical field of algorithms, in particular to a BOX algorithm-based navigation path planning method, which comprises the following steps of: S1, generating a linear reference path from a starting point to an end point through a Bresenham algorithm, and ensuring the shortest distance potential of an initial path; s3, the shortest path is selected during obstacle avoidance, and obstacle avoidance redundancy is reduced; s4, dynamically adjusting a sliding mode by combining sliding optimization with path complexity, and furthest shortening the length of a free section on the premise of safety; s3, differential obstacle avoidance paths are generated according to the obstacle motion characteristics, for example, predictive oblique line bypassing is adopted for regularly moving obstacles to accurately avoid the obstacles, buffer space is reserved for irregularly moving obstacles, and the collision risk is reduced from the source; in the step S5, the constraint condition of the free section further ensures that the path conforms to the physical limitation of the mobile device, and mechanical failure or collision caused by unreasonable path design is avoided.

The invention discloses a testing device which comprises a cavity used for receiving a liquid sample, a cover body, the cover body is used for sealing the cavity, the cover body further comprises a carrier with a groove, the carrier is used for receiving and holding a test strip, the cover body further comprises a hole, the hole is communicated with the groove, and the hole is communicated with the groove. The cover body is provided with a mark, the connecting line between the mark and the hole is the shortest distance, and when a test is carried out, the mark is set to indicate an inclined direction, so that a liquid sample is in contact with a test area of the test strip in the groove, and by adopting the device, the test can be rapidly carried out, the operation is simple and convenient, and the test efficiency is improved. And the test result is more accurate.

To provide a game machine having features in presentation devices.SOLUTION: A first movable body and a second movable body are at least partially connected by a member. A shortest distance between a first part of the first movable body at a first position and a second part of the second movable body at a third position is equal to a shortest distance between the first part of the first movable body at a second position and a second part of the second movable body at a fourth position. The first movable body at the first position and the second movable body at the third position overlap display means with a first size, and the first movable body at the second position and the second movable body at the fourth position overlap the display means with a second size. The first size and the second size are the same size. When the first movable body is at the first position and when the first movable body is at the second position, the positional relations of the member with respect to the display means are the same. When the second movable body is at the third position and when the second movable body is at the fourth position, the positional relations of the member with respect to the display means are the same.SELECTED DRAWING: Figure 101

The invention provides a danger early warning method based on rapid calculation of the distance between a point and an area on a plane, a medium and equipment, and belongs to the technical field of cloud computing. The method comprises the following steps: firstly, outwards expanding a space with a specified threshold size for all areas; secondly, the minimum circumcircle is calculated for each expanded area, and the position of the circle center and the radius length are obtained; then, when the shortest distance between the target point and the multiple areas is calculated to be smaller than a threshold value or not, the distance between the target point and the circle center of all the minimum circumcircle can be compared firstly, and if the distance is larger than the radius of the minimum circumcircle, whether the target point is in the expanded area or not does not need to be calculated; and then, calculating whether the target point is in the expanded region or not to judge whether the distance between the target point and the region before expansion is smaller than a threshold value or not. According to the method, the complex calculation overhead is saved, and the calculation overhead can be further reduced by combining the information of the administrative region where the minimum circumcircle is located.

The invention relates to the technical field of distance measurement, in particular to a laser point cloud plane detection and distance measurement method, device and equipment and a medium. And the automatic measurement of the underground tunnel wall distance is realized by using the laser radar. The measurement distance is the distance from the laser radar to the wall surface of the tunnel wall. The distance is equal to the plane distance from the viewpoint of the laser radar to the tunnel wall point set fitting, and is the shortest distance from the point to the plane. According to the strategy of the invention, the laser radar scans the tunnel wall area as much as possible, so that the area occupied by the tunnel wall area in the visual field of the laser radar is maximum. Then the vertical face with the largest area in the scene is obtained through the algorithm, and the distance between the vertical face and the laser radar is measured. And then, the least square method is adopted for plane fitting, so that the precision of plane extraction is improved, and the method is not influenced by outlier noise and is also not influenced by the unevenness and unevenness properties of the tunnel wall surface.

The application discloses a wire cutting machining method and device. The wire cutting machining method comprises the following steps: acquiring a current machining position of a workpiece to be machined, determining a geometric feature of the workpiece to be machined corresponding to the current machining position, wherein the geometric feature comprises a straight line feature and a circular arc feature; determining a target discharge gap corresponding to a cutting metal wire according to the geometric feature, wherein the target discharge gap is used to represent the shortest distance between the surface of the workpiece to be machined and the outer surface of the cutting metal wire; obtaining a current cutting offset of the cutting metal wire according to the target discharge gap and the cross-sectional radius of the cutting metal wire, wherein the current cutting offset is equal to the sum of the target discharge gap and the cross-sectional radius; and controlling the cutting metal wire to perform cutting machining according to the current cutting offset. The wire cutting machining method can significantly improve the machining precision and machining efficiency of small structural parts.

The application provides an automatic control method of an excavator, an excavator controller, an excavator and a medium, and relates to the technical field of excavator control. The method comprises the following steps: acquiring a current work track corresponding to a first work cycle of the excavator; determining a relative position and a relative height between a starting point and an ending point of the current work track; determining a target work track with the shortest distance between the starting point and the ending point according to the relative position and the relative height of the current work track; determining a target speed proportion relationship between a swing speed of a swing arm and a lifting speed of the swing arm according to the target work track; determining an actual handle opening degree of an operation handle according to the target speed proportion relationship, and automatically controlling the excavator according to the actual handle opening degree. According to the method, the handle opening degree can be automatically adjusted according to an actual working condition, so that different working conditions can be automatically adapted, the operation difficulty of the excavator is reduced, and the working efficiency is improved.

The utility model discloses a container which comprises a container body, a first container door and a second container door, and a door slot is formed in the opposite end faces of the first container door and the second container door. A first box door lock rod is mounted on the first box door, and the number of the first box door lock rod is one; one or more second box door lock rods are mounted on the second box door; the distance between the first box door lock rod and the door slot is a first distance, the distance between the second box door lock rod with the shortest distance from the door slot and the door slot is a second distance, and the first distance is larger than the second distance. Only one first box door lock rod is installed on the first box door, the number of the lock rods is reduced, on one hand, the first box door lock rod is far away from a door slot and close to a door hinge, and therefore the opening degree of the box door is enlarged. On the other hand, the sealing performance of the box door is guaranteed through the second box door lock rod. According to the utility model, the number of the lock rods is reduced, and the box door is easier to open and close while the sealing performance of the box door is ensured.

The present invention addresses the problem of appropriately transmitting light. In a glass (10), when: the outer peripheral edge of the largest circle, centered on a center (P0) of the glass (10) and being contained within the range of an outer peripheral edge (10C) of the glass (10), is defined as a reference circumference (A0); a circumference, 5 mm away from the reference circumference (A0) inward in the radial direction, is defined as a first circumference (A1); the circumference of a circle, centered on the center (P0) of the glass (10) and having a radius that is half the distance between the reference circumference (A0) and the center (P0) of the glass (10), is defined as a second circumference (A2); a point on the first circumference (A1) is defined as a first point (P1); and a point having the shortest distance from the first point (P1) among the points on the second circumference (A2) is defined as a second point (P2), the maximum value of retardation is 20 nm or less in a straight line section (S) connecting from the first point (P1) to the second point (P2) in a straight line, the retardation does not monotonically decrease or monotonically increase from the first point (P1) toward the second point (P2), and there is a position where the retardation has an extreme value between the first point (P1) and the second point (P2).

A sidewall has a first decorative portion and a second decorative portion decorated with a plurality of ridges. The first decorative portion includes a first part extending along a first direction having a first angle with respect to the circumferential direction and a second part extending toward the second decorative portion along a second direction having a second angle with respect to the circumferential direction. The second angle is greater than the first angle. A shortest distance between the second part and the second decorative portion is a first distance. The first distance is greater than or equal to 0.5 mm and less than or equal to 3.0 mm. A shortest distance between the first part and the second decorative portion is larger than the first distance.

The invention relates to a method for operating a particle beam apparatus for imaging, processing and / or analysing an object. For example, the particle beam apparatus is embodied as an electron beam apparatus and / or an ion beam apparatus. The invention furthermore relates to a computer program product and to a system comprising a particle beam apparatus for carrying out the method. The method comprises providing first structure data and second structure data; determining a target arrangement for a first device; providing at least one movement path; modelling the movement path of the first device within the particle beam apparatus; carrying out a check to determine whether the modelling of the movement path has the result that at least one first surface arrangement of the first device and at least one second surface arrangement of the at least one second device, when carrying out a movement process, (i) have at least one common point or (ii) are at a shortest distance but do not have a common point, wherein the shortest distance is smaller than a predefinable minimum distance; and, depending on the result of the check, displaying a message, discarding a movement process, changing a speed of the movement process, aborting the movement process, switching the movement process to a further movement process and / or carrying out the movement process of the first device using a movement device for moving the first device.

An all-steel three-drum rotary pull reversed capsule structure belongs to the field of tire production technology. It includes a reversed barrel portion, a neck barrel portion, a tooth portion, and an outer material bonding portion. The shortest distance W1 between the film VII41 bonded to the outer material bonding portion and the inner side surface of the reversed capsule tooth portion is 40 mm; the shortest distance W2 between the film VIII42 bonded to the outer layer of film VII41 and the inner side surface of the reversed capsule tooth portion is 30 mm; and the shortest distance W3 between the film IX43 bonded to the outer layer of film VIII43 and the inner side surface of the reversed capsule tooth portion is 20 mm. The present invention adjusts the position and size of the bonded films to achieve the purpose of shortening the overall size of the capsule and moving the high point inward, thereby increasing the inflation height of the capsule, so that the high point of the capsule moves closer to the bead portion after inflation, and the tire body and the rubber core are bonded after inflation.

No protection is sought for the matter shown in dotted lines and red marked parts [disclaimer]; the joints of the wetsuit, which are made of extremely thin fabric, are not sewn but joined by heat welding with sealing tape; the line of the joint is not a straight line with the shortest distance, but a curved line suitable for the movement of the part; these features improve the elasticity and functionality of the joints.

An encoder determines, based on a width and a height of a block, whether or not to disable a prediction mode in which the block is split along a partitioning line defined by a distance and an angle and then prediction is performed; and encodes the block with the prediction mode disabled or not disabled according to a result of the determination on whether or not to disable the prediction mode. Here, the distance is the shortest distance between the center of the block and the partitioning line, and the angle is an angle representing a direction from the center of the block toward the partitioning line in the shortest distance. The encoder determines to disable the prediction mode when (i) a width-to-height ratio is at least 8 or (ii) a height-to-width ratio is at least 8.

The invention provides a baseline iteration adjustment method of a tunnel three-dimensional model, and belongs to the technical field of tunnel modeling. The method comprises the steps of obtaining a three-dimensional model of a tunnel through photogrammetry; according to the center line of the tunnel and the section information of the tunnel, the first discrete points in the center line are shifted to the side walls of the tunnel, so that coordinates of the second discrete points on the design lines of the side walls on the two sides of the tunnel are obtained. In the extending direction of the three-dimensional model, a plurality of first feature points are marked at the corresponding hole openings in the three-dimensional model, and a plurality of second feature points are marked in the corresponding hole bodies in the three-dimensional model. And endowing the coordinates of a second discrete point at the portal of the tunnel to the first feature point to obtain the coordinates of a second feature point. And correcting the coordinate of the second feature point through the accumulated chord length of the second feature point in the extension direction of the three-dimensional model. And correcting the coordinates of the second feature point again by calculating the shortest distance from the second feature point to the design line. According to the adjusting method, the precision of tunnel three-dimensional modeling can be improved.

An information processing apparatus includes a processor configured to: detect a closest portion being a portion having a shortest distance from an operation surface in a perpendicular direction of the operation surface among portions of an object in a spatial region facing the operation surface; determine a position on the operation surface corresponding to a position of the closest portion as an instruction input position by a non-contact operation of a user; and, in a case where a distance between a first position of the closest portion detected at a first time point and a second position of the closest portion detected at a second time point after the first time point, in a plane direction parallel to the operation surface is equal to or longer than a threshold distance, invalidate an instruction input on a position on the operation surface corresponding to the second position.

The invention provides a method and system for detecting the assembly state of a bolt and a nut in a three-dimensional model, electronic equipment and a medium, and the method comprises the steps: obtaining target nut information, target bolt information and the axis of a target nut, determining two detection surfaces based on the axis of the target nut, and enabling the target bolt to be located between the two detection surfaces; determining the length L of the target bolt, the shortest distances B1 and B2 between the target bolt and the two detection surfaces, and the vertical distance A between the detection surfaces, A-(B1 + B2) being first judgment values; and L is compared with a first judgment value, if the difference value between the L and the first judgment value is larger than a first preset error value, it is judged that assembling between the target bolt and the target nut is abnormal, and the assembling between the target bolt and the target nut is output. And the distance between the nut and the bolt is detected, and the distance difference between the nut and the bolt is calculated, so that whether the bolt and the nut have abnormal assembly places or not can be quickly detected.

A rotary cutting tool comprising a tool body (2) with at least one insert seat (10), and a double-sided indexable cutting insert (30) with several working positions releasably mountable in said insert seat. A tangential support surface on a bottom wall (12) in the insert seat is divided into two or more tangential support sub surfaces (17a, 17b) that are substantially coplanar with each other and separated from each other by a groove (18), which extends across the bottom wall along a reference plane that is coplanar with a central plane of the cutting insert when mounted in the insert seat. The shortest distance between said reference plane and a tangential support sub surface (17a, 17b) on any side of said reference plane is equal to or larger than D / 4, where D is the major diameter of the internally threaded part (21) of the screw hole (20) in the bottom wall (12) in said insert seat.

To provide a simulator allowed to suppress the lowering in accuracy of simulation even where an object has a curved surface.SOLUTION: A simulator comprises: an input section that inputs a simulation condition including information representative of a shape and position of an object arranged in an analysis space and fluid flowing in the analysis space and initial and boundary conditions; a processing section that defines a plurality of secondary curved-surface elements to reproduce a surface of the object, arranges a plurality of fluid particles representative of the fluid in the analysis space and calculates the shortest distance from respective ones of the plurality of fluid particles to the secondary curved-surface elements and furthermore calculates, on the respective ones of the plurality of fluid particles, a force to undergo from the surface of the object based on a calculation value of the shortest distance and determines a behavior of the plurality of fluid particles based on the force calculated; and an output section that information reflecting the behavior of the plurality of fluid particles is outputted.SELECTED DRAWING: Figure 7

The outer circumference of a slot rod (5) has rib parts (9) and groove parts (7) that alternate in the circumferential direction such that the groove parts (7) are formed between adjacent rib parts (9). A plurality of optical fiber core wires (15) are accommodated in each of the groove parts (7) of the slot rod (3), and a wrap (11) is wound around the outer circumference of the slot rod (5). The outer circumference of the wrap (11) is covered with a jacket (13). The shortest distance (b) from the center of the slot rod (5) to the surface of the jacket (13) as covering the groove parts (7) is shorter than the distance a from the center of the slot rod (5) to the surface of the jacket (13) as covering the rib parts (9).

A developing device includes a first rotatable member to which developer is delivered, a second rotatable member provided opposed to the first rotatable member, to which the developer is delivered from the first rotatable member by a magnetic field generated by a first magnet, to carry and feed the developer, and a third rotatable member provided opposed to the second rotatable member, to which the developer is delivered from the second rotatable member. A guiding portion is provided opposed to the second and third rotatable members to guide the developer peeled off from the third rotatable member by a repelling magnetic field generated by a third magnet. Where a shortest distance between the second rotatable member and the guiding portion is B [μm], and a shortest distance between the third rotatable member and the guiding portion is C [μm], the following relationship is satisfied: B+100 μm≤<C.

The invention discloses a support positioning and mounting method and a B-type cabin ship manufacturing method.The support positioning and mounting method is used for ship multi-support mounting and comprises the steps that firstly, a web plate, a rib plate and a bottom end common datum plane of each support are selected to serve as ship width datum lines, ship length datum lines and ship height datum lines respectively; an intersection line of a certain rib position cross section of a to-be-installed structure and a top surface or a bottom surface of the to-be-installed structure is taken as a rib position datum line, then a preset shortest distance between a ship width datum line and a midship line is defined as a first distance, a distance between a ship length datum line and the rib position datum line is defined as a second distance, and a distance between a ship height datum line and an upper surface or a lower surface of the to-be-installed structure is defined as a third distance; and positioning is carried out according to the three preset distances of the supports. According to the method, positioning is carried out based on a unified reference and parameters, a constructor can carry out rapid installation according to a preset distance, repeated measurement and adjustment are not needed, uncertainty is reduced, efficiency is improved, the three-dimensional position of the support is accurately determined, installation accuracy is guaranteed, and the problems of pairing gaps and dislocation between multiple sets of paired supports and a ship structure are effectively solved.

The display substrate and display device provided by the present disclosure belong to the technical field of display technology, and can at least partially solve one of the existing technical problems. The display substrate of the present disclosure comprises a substrate substrate, and a plurality of sub-pixels arranged in an array on the substrate substrate; the adjacent sub-pixels have a spacing area; the spacing area comprises a first spacing area having a functional site and a second spacing area without a functional site; at least part of the functional site is provided with a functional part; the width of the first spacing area between adjacent two sub-pixels arranged in a first direction or a second direction is greater than the width of the second spacing area between adjacent two sub-pixels arranged in the same direction; wherein the width of the spacing area is equal to the shortest distance between the boundaries of the two sub-pixels corresponding to the spacing area.

The invention relates to a control method and device of a sweeper, a storage medium and a program product, and belongs to the technical field of sweepers, and the method comprises the following steps: determining a plurality of obstacles in a map according to an edge track of the sweeper on the map; for adjacent obstacles, determining the shortest distance between the adjacent obstacles and the shortest path obtained by mapping the shortest distance on the map; determining a threshold distance according to the type of the adjacent obstacle; and under the condition that the shortest distance is greater than or equal to the threshold distance, taking the shortest path as an entrance boundary of a supplementary sweeping area of the sweeper, and controlling the sweeper to enter the supplementary sweeping area through the entrance boundary. Therefore, the entrance boundary can be accurately determined, and the sweeper is controlled to enter the supplementary sweeping area through the entrance boundary so as to carry out supplementary sweeping cleaning.

The invention relates to a pyrotechnic current breaker (1) for severing a conductor (9), having a housing (2) which is equipped with a cutting piston (8) and an ignition unit (16) for driving the cutting piston (8). The conductor (9) passes through the housing (2), and when the igniter (18) is triggered, the cutting piston (8) severs a printed circuit board (12) from the conductor (9). According to the invention, at least one spacer (20), preferably three spacers (20), are provided between the cutting piston (8) and the conductor (9), said spacers having the shape of pins and lying on a circle (19), the center of which lies on the central axis (24) of the cutting piston (8). If the side of the spacers facing the printed circuit board (12) is angled such that the region (21) of each spacer (20) adjoining the central axis (24) has a shorter distance to the printed circuit board (12) than the region (23) facing away from the central axis (24), the spacers (20) are pushed towards the central axis (24) when the igniter is triggered such that the spacers can be received in a recess (22). Furthermore, the region (21) adjoining the central axis (24) is easily deformable such that changes in the distance between the cutting piston (8) and the conductor (9) due to temperature fluctuations are compensated for.

To provide an optical element which can be appropriately manufactured and is hardly deformed.SOLUTION: An optical device 10 includes a resin-made lens 30 having a cut surface 32A formed on an outer periphery 32, and a light-transmissive base material 20 supporting the lens 30 and having a Young modulus higher than that of the lens 30. The connecting portion 32A between the cut surface 32A of the lens 30 and the portion other than the cut surface 32C of the outer periphery 32 of the lens 30 has a shape including at least one of an edge shape, a chamfered shape, and a rounded shape, and the shortest distance 32A from the center of the lens 30 to the cut surface A2 is shorter than the shortest distance A1 from the center of the lens 30 to the portion other than the cut surface of the outer periphery 32 of the lens 30.SELECTED DRAWING: Figure 2

A computing system configured to: (1) render, via a graphical user interface (GUI) displayed by a client station, a three-dimensional view of a construction project using a three-dimensional model file that defines a set of meshes representing physical objects of the construction project, wherein each mesh comprises a set of triangular faces, and wherein the GUI includes a measurement tool for obtaining a shortest distance between a first mesh and a second mesh; (2) receive a request to obtain the shortest distance between the first mesh and the second mesh; (3) calculate a set of distances potentially comprising the shortest distance between the first mesh and the second mesh by first reducing one or both of: (i) the number of faces between which distances are calculated and (ii) the number of distances that are calculated; and (4) determine the shortest distance between the first mesh and the second mesh.

Optical fibers 3 have end faces 5 that are cut not perpendicularly but obliquely relative to the axial direction of the optical fibers 3, so that the distance between the end faces 5 facing each other varies in the circumferential direction of the optical fibers 3. First, a circumferential position (part A) having the shortest distance between the tip parts of the optical fibers 3 is specified. Next, a control unit continuously applies a voltage between a set predetermined set of electrodes 7a and 7b for a predetermined time (first discharge step). In this state, the optical fibers 3 are moved in the direction in which the optical fibers abut against each other. In this state, the control unit applies a voltage between the adjacent electrodes 7a, 7b, and 7c, and sequentially changes the combination of the electrodes at predetermined time intervals (second discharge step).