332 results about "Short 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 an oil exploitation packer with an expanding type sealing structure, which belongs to the field of oil field downhole tools and comprises a central tube, an upper joint and a lower joint are respectively arranged at two ends of the central tube, a sealing component and a setting component are sequentially sleeved between the upper joint and the lower joint, and the upper joint and the lower joint are connected with a centralizing component and a reversing component in a matched manner. The sealing assembly comprises an installation pipe sleeved on the central pipe and a rubber sleeve sleeved on the outer side of the installation pipe, a first sliding rod and a second sliding rod which are alternately distributed and linked are arranged on the installation pipe in a sliding mode, and a first pushing block and a second pushing block are respectively hinged on the two sliding rods. When the two sliding rods move towards the setting assembly, the first pushing block and the second pushing block alternately penetrate and are spliced into a sealing ring with the outer diameter larger than the inner diameter of the rubber sleeve. The installation pipe provides a stable installation foundation for all the components, sliding rod linkage ensures that the pushing blocks move coordinately and synchronously, the sealing ring extrudes the rubber barrel to enable the rubber barrel to be expanded to be attached to the well wall to achieve sealing, and formation fluid channeling is effectively prevented. And by adjusting the radian of the push block and the length of the push rod, rapid sealing can be achieved under short-distance movement, and sealing reliability and response efficiency are improved.

The utility model discloses an automatic origin finding structure of an automatic bottom thread changing device of an embroidery machine, at least two automatic bottom thread changing devices move along a transverse guide mechanism, the transverse guide mechanism is provided with an original point position corresponding to each automatic bottom thread changing device, and a working origin detecting component is arranged between each automatic bottom thread changing device and the corresponding original point position. The detection device is used for detecting whether the automatic bottom line changing device runs to a corresponding original point. When the automatic bottom line changing device is shut down, powered off and restarted accidentally, the device can move nearby along the transverse guide mechanism in a short distance to find a working original point, and if the working original point detection assembly detects a corresponding original point position, the working original point can be found.

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.

The utility model relates to the technical field of paint bucket transportation, in particular to a paint bucket clamping and transporting device which comprises a frame body and a clamping mechanism, universal trundles are arranged on the frame body, and the frame body can be moved through the universal trundles. The clamping mechanism is arranged on the frame body, the clamping mechanism is provided with the supporting arm, the multiple clamping assemblies are arranged on the supporting arm, the multiple clamping assemblies can clamp multiple positions of the coating barrel body in the vertical direction, and the clamping stability is ensured. The clamping assembly is provided with a first clamping part and a second clamping part, the first clamping part and the second clamping part are rotationally connected, the first clamping part and the second clamping part are arc-shaped plates, and through the arrangement mode of rotational connection, it can be ensured that the first clamping part and the second clamping part can be attached to the outer surface of the coating barrel body. Through the design of the structure, the coating barrel body can be stably fixed, short-distance transportation can be carried out, the working efficiency is improved, and potential safety hazards are reduced.

The invention provides self-made small five-axis numerical control machine tool teaching equipment and an operation method thereof, and relates to the technical field of numerical control machining teaching equipment. A main shaft system and a clamp are arranged on the five-axis movement system; a transparent safety protection cover is arranged on the peripheral side of the five-axis movement system in a covering manner; a plurality of cameras are arranged on the five-axis movement system or the safety protection cover; the control system is respectively connected with the plurality of cameras, the main shaft system, the clamp and the five-axis movement system; according to the invention, an open modular structure is adopted, key moving parts and a processing process are completely exposed or visible through the transparent protective cover, so that a teacher can explain step by step and observe at a short distance with students; the machine tool body is made of light-weight materials such as aluminum alloy or engineering plastics, an open source numerical control system and standardized electromechanical components are combined, and on the premise that the basic teaching function is guaranteed, the manufacturing cost and maintenance complexity of equipment are greatly reduced.

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 relates to the technical field of grouting engineering, and provides a grouting device. The grouting device comprises an outer cylinder drilling tool, a multi-stage pushing assembly, a pose adjusting assembly and a grouting system. Wherein an operation cavity is formed in the outer cylinder drilling tool, and an operation hole is formed in the side wall of the outer cylinder drilling tool; the multi-stage pushing assembly is arranged in the operation cavity, a flow channel is formed in the multi-stage pushing assembly, and a differential pressure control valve is arranged in the multi-stage pushing assembly; the multi-stage pushing assembly is used for switching between an extension state and a contraction state, and in the extension state, the multi-stage pushing assembly extends out of the operation cavity; and in the contraction state, the multi-stage pushing assembly is located in the operation cavity. The pose adjusting assembly is connected with the multi-stage pushing assembly and used for adjusting the pose of the multi-stage pushing assembly. And the grouting system is communicated with the flow channel, so that grout reaches the external environment. The defects that in the prior art, large-angle corner hole forming cannot be achieved in a short distance and flexible grouting cannot be achieved in a limited space are overcome, and efficient, accurate and stable small-range multi-angle hole forming and grouting operation is achieved.

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.

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 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 utility model belongs to movable type support pier structure in the field of shipbuilding technology. The drive wheel (10) of first motor (9) of one side of support pier body (3) connects first track assembly (1), the drive wheel (10) of second motor (11) of the other side of support pier body (3) connects second track assembly (7), and the bottom of support pier body (1) is provided with lifting component (6), and the lifting rod (8) of bottom lifting component (6) is connected with the bottom of support pier body (3). The movable type support pier structure has simple structure, can satisfy reliable lifting support in the process of shipbuilding, can be automatically moved in short distance on site, saves manpower, saves time and is at ease, and improves shipbuilding efficiency.

The present invention provides a multifunctional nursing wheelchair, comprising a chassis moving assembly, a bracket assembly and a seat assembly, wherein the seat assembly is mounted on the chassis moving assembly through the bracket assembly, and the height of the seat assembly relative to the chassis moving assembly can be adjusted through the bracket assembly, wherein the seat assembly comprises a seat frame, a first seat plate and a second seat plate, wherein the first seat plate and the second seat plate are respectively rotatably mounted on one side of the seat frame, and the first seat plate and the second seat plate form a seat plate as a whole when combined together, and in a separated state, the first seat plate and the second seat plate can be horizontally rotated in a direction away from each other with a rotation amplitude of not less than 90 degrees; the patient can complete the displacement of the body by himself with the help of the nursing wheelchair, thereby completing urination and defecation independently, and can also get out of bed rest by himself when a caregiver is not present, and perform standing exercises or short-distance walking exercises with the help of the nursing wheelchair.

The invention relates to the technical field of feeding route planning, in particular to an AGV feeding route planning method and system. During application, after a feeding instruction is obtained, a corresponding feeding sequence and a reference route are generated, the AGV advances along the reference route to recognize whether a front production machine belongs to the feeding sequence or not, and if yes, the AGV is marked as a to-be-fed machine. When the AGV carries out feeding, the to-be-fed machine table generates an arc-shaped correction track to replace a section of reference route in front, so that other AGVs which do not carry out feeding on the machine table adopt the shortest arc-shaped track which is easy to carry out to bypass the to-be-fed machine table, and enough operation space is provided for feeding work and return travel. And returning to the reference route of the AGV along the shortest distance after the AGV finishes feeding. The whole feeding process is highly automatic, the arc-shaped correction track can be automatically generated to provide redundant space, the two-dimensional code is updated after feeding is completed for a certain period of time, the arc-shaped correction track is automatically eliminated, and the manual scheduling cost is reduced.

The utility model discloses a movable seven-degree-of-freedom radar locating vehicle-mounted platform, which relates to the field of multi-degree-of-freedom motion simulation platforms and comprises a Mecanum wheel trolley, a seven-degree-of-freedom motion platform and a radar device. The seven-degree-of-freedom motion platform comprises a six-degree-of-freedom lower platform installed on the Mecanum wheel trolley, a control box installed on the six-degree-of-freedom lower platform, and a six-degree-of-freedom upper platform arranged on the side, away from the Mecanum wheel trolley, of the six-degree-of-freedom lower platform. And the freedom degree assembly is connected between the six-freedom-degree lower platform and the six-freedom-degree upper platform. The Mecanum wheel trolley and the seven-degree-of-freedom motion platform are arranged on the lower side of the radar device, all postures needed by the docking platform can be met to a certain degree, installation and debugging of related products are more convenient, meanwhile, short-distance movement can be achieved, the position suitable for radar docking can be found conveniently, and the radar docking efficiency is improved. The influence of the external environment on the radar is reduced as much as possible.

A system and a method are disclosed for determining a range of potential distances between a work machine and an object. The system receives an image captured by a camera on the work machine and identifies an object in the image. The system determines an angle between the camera and the object, a height associated with the object, and an uncertainty associated with the height. Based on the angle, the height, and the uncertainty, the system determines a range of potential distances between the work machine and the object. The shortest distance in the range is compared to a threshold distance for safe operation of the work machine. When the shortest distance in the range is less than the threshold distance, the system causes the work machine to perform a safety action.

The invention discloses an automatic carrying platform for shaft levers. The automatic carrying platform comprises a platform body and two sliding rails with the same parameters, wherein the upper end face of the platform body inclines towards one end. The platform is made of a magnetic material or a layer of magnetic material is fixed on the surface of the platform; the slide rail main body is a stainless steel cuboid without magnetism, and a plurality of stepped holes with small upper parts and large lower parts are uniformly formed in the slide rail main body; a strong magnetic block is embedded and fixed in a large hole site below the stepped hole; the two sliding rails are fixed to the upper surface of the platform in a magnetic attraction mode and arranged in parallel, the shaft rod is arranged on the two sliding rails, and thin polished shaft parts at the two ends of the shaft rod make contact with the two sliding rails. The inclination angle of the upper end face of the platform ensures that the shaft rod can automatically and stably roll along the sliding rail. The shaft rod can stably roll on the shaft rod conveying device without deflection, installation is flexible and convenient, the shaft rod can be conveyed within the short distance smaller than or equal to 0.5 m, the shaft rod conveying device is suitable for conveying shaft rods with different lengths, and the application range is wide.

The utility model relates to the technical field of rail traffic construction, in particular to a noise reduction and damage prevention device for short-distance horizontal transportation of steel rails, which comprises a fixing component, universal wheels are respectively arranged at the positions of fulcrums on the periphery of the bottom of the fixing component, and the universal wheels are detachably connected with the fixing component. The steel rail is fixed to the fixing assembly through a fastener, and steel rail end baffles are arranged at the two ends of the fixing assembly. The utility model has the advantages that the convenience and the safety of horizontal transportation of the steel rail are improved, and the construction efficiency is improved; the device is simple and reasonable in structure, convenient to use, reusable and suitable for popularization.

The invention relates to a method and device for determining a construction area of a switching station, computer equipment and a medium, and the method comprises the steps: determining an initial area for arranging the switching station based on a factory building outgoing line point, a length threshold value and a height threshold value, and removing an area, coinciding with an arrangement forbidding area, in the initial area to obtain an arrangement allowing area; determining a plurality of target contour lines on the basis of a preset elevation step length by taking a point, which has the shortest distance from the permitted arrangement area, in the lowest contour lines of the permitted arrangement area as a starting point; determining a plurality of first target points in the lowest contour line and the target contour line based on a preset plane step length; each first target point is used as a positioning point of the candidate arrangement area, a preset length and a preset width are used as the length and the width of the candidate arrangement area, and a target area with the minimum construction cost is determined from the candidate arrangement areas meeting the preset arrangement condition. According to the method, the target area which is suitable for construction of the switching station and has the minimum construction cost can be rapidly determined.

1. The name of the design product: pallet truck. 2. The use of the design product: for short and medium distance transportation of pallet goods. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1. 5. The bottom of the design product is the part that is not easy to see or cannot be seen during use, and the top view is omitted.

The invention discloses an intelligent anti-collision protector based on a sensor network, relates to the technical field of intelligent anti-collision protectors, and provides the following scheme that the intelligent anti-collision protector comprises a right front plate, a left front plate, a back plate and a waist supporting plate. The right front plate and the left front plate are connected through the connecting plate and the connecting pin, the connecting plate is provided with multiple holes, the position can be adjusted, adaptability is improved, the connecting pin is matched with the rotating plate and the handle so that disassembly and assembly can be facilitated, connection is stable and looseness is prevented through combination of clamping blocks and the like, and the waist supporting plate is in a V shape and is provided with a silica gel pad so that the waist can be attached more comfortably; the position can be accurately adjusted, a back plate moving plate is provided with a limiting rod groove, a moving stabilizing plate, a connecting elastic band and other parts, the protector can be flexibly fixed, different girths can be adapted, convenience and comfort are improved, infrared sensors are distributed at multiple positions, the distance can be monitored, collision can be prevented, an alarm can be triggered in a short distance, a waist pressure sensor detects collision, and a single-chip microcomputer judges danger and gives an alarm. And intelligent early warning can be realized.

An electronic device is located in a transportation means and includes an ECU, a first and a second short-distance wireless communication module, wherein between which a distance is a first distance. When no interference, the second short-distance wireless communication module receives a first message broadcast by the first short-distance wireless communication module. When interference, the second short-distance wireless communication module does not receive the first message, and sends a notification message to the ECU; and the ECU indicates the first short-distance wireless communication module to increase a transmit power until the second short-distance wireless communication module receives the first message. Therefore, the first message can be received only when a distance between a mobile device and the transportation means is less than or equal to the first distance, so as to send a first response message, so that the electronic device controls the transportation means to perform a specific function.

The invention discloses a multi-specification adaptive automatic positioning anti-clamping drill rod recovery cabin, and belongs to the technical field of drill rod recovery. The middle shaft rod is fixedly connected to the center in the fixed iron sheet shell; a plurality of groups of positioning holes are arranged, and the plurality of groups of positioning holes are equidistantly formed in the middle shaft rod; and a movable iron shell. According to the multi-specification adaptive automatic positioning anti-clamping drill rod recovery cabin, three actions of dismounting, transferring and storing are integrated on one drill rod positioning mechanism, a worker does not need to repeatedly run between a drilling machine and a stacking point, the position can be adjusted by rotating a drill rod clamping seat, a vacant site on the drill rod clamping seat is rapidly switched to a working position, and a next drill rod is waited to be placed in; operation is smooth, time is saved, the carrying distance is shortened, a worker only needs to unscrew a drill rod from a drilling machine, the drill rod can be placed in a drill rod clamping base in a recovery cabin beside the worker by horizontally moving the drill rod by a short distance, and the heavy drill rod does not need to be carried for a long distance.

The invention discloses a magnetic tape, magnetic tape unit equipment and a storage system, and relates to the technical field of magnetic tapes. The problem of tail time delay of magnetic tape unit equipment is solved. According to the specific scheme, belt bodies used for storing data are connected end to end, and in the process of accessing the data of the belt bodies, the belt bodies can move in two directions and can reach a target area where the accessed data are located in the two directions. The addressing length can be shortened by selecting the direction with the short distance to reach the target area. Wherein the maximum addressing length is 1 / 2 or less of the perimeter of the belt body. And the problem of tail time delay is improved. The addresses in the belt body do not need to be arranged in a snake shape, and the continuity of the addresses in the belt body can be guaranteed. For example, addresses may be arranged in the same direction.

A coil assembly is provided, including a main body including first and second side surfaces opposite to each other in a first direction and third and fourth side surfaces opposite to each other in a second direction, the main body including a magnetic material, a coil disposed in the main body, the coil forming at least one turn, and a lead frame connected to both ends of the coil in the main body, the lead frame being disposed on the first and second side surfaces of the main body. When a shortest distance between the coil and the third side surface of the main body is denoted by M and a length of the main body in the second direction is denoted by W, M / W satisfies greater than or equal to 0 and less than or equal to 0.1. y y ​​

The earthwork backfill tamping device comprises a tamping top plate, a mounting plate and an adjusting frame, the adjusting frame comprises two sets of scissor supports, and the upper ends and the lower ends of one sides of the two sets of scissor supports are hinged to the tamping top plate and the mounting plate through hinged supports respectively. The upper ends and the lower ends of the other sides of the two scissor supports are in sliding fit with the tamping top plate and the mounting plate correspondingly, a connecting shaft is arranged between the two scissor supports, the two ends of the connecting shaft are rotationally mounted in the middles of the scissor supports correspondingly, and a reset spring pipe is connected between the connecting shaft and the mounting plate. The tamping top plate is mounted below the mounting plate through the telescopic reset adjusting frame, height adjustment and adaptation of the tamping top plate are achieved through stretching and retracting of the adjusting frame, and movement adjustment of the tamping top plate in a short distance is assisted under large-distance movement of the mounting structure; and real-time adjustment of the tamping top plate is achieved through a special adjusting frame.

A positioning method and a related device, which are used for realizing low-power-consumption positioning and improving the endurance capability. For example, a first device determines whether a first condition is satisfied, wherein the first condition comprises at least one of the following: a current electric quantity being less than a first preset electric quantity, a current load being greater than a first preset load, a current time being within a first preset time period, and a positioning system in the first device detecting that the first device enters a first geofence; and if it is determined that the first device satisfies the first condition, the positioning mode of the first device is switched from a first mode to a second mode, wherein the first mode involves performing positioning by means of the positioning system, and the second mode involves performing positioning by means of a short-distance communication module in the first device. Since the power consumption of positioning in a second mode is relatively low, the power-down speed of a first device can be reduced, thereby improving the endurance capability of the first device.

To provide a game machine which can smoothly progress a game.SOLUTION: A first guard part has at least a base part to which a first long side of a reel tape is attached, and a protrusion bonded to the base part and protruding from the base part toward the center of a circle of the first guard part. The base part further has an outer end part farthest from a second guard part in a shaft center direction of a rotation shaft, and an inner end part nearest to the second guard part in the shaft center direction of the rotation shaft. A shortest distance between the outer end part and the protrusion is larger than a maximum thickness of the rotation shaft in the protrusion in the shaft center direction. A shortest distance between the outer end part and the protrusion is larger than a shortest distance between the inner end part and the protrusion.SELECTED DRAWING: Figure 203