201 results about "Collision problem" patented technology

Wireless communication networks utilize various communication protocols to exchange data between wireless network devices. Overlapping communication frequencies between data exchange protocols present a collision problem when data transmissions interfere with one another during wireless transit. A device for moderating transmission traffic in a wireless network where overlapping communication frequencies coexist is described to reduce or avoid interference caused by signal collisions.

The invention relates to an AGV path planning method based on time window optimizing. The AGV path planning method based on time window optimizing comprises the following steps: setting information of key joints, entering joints and exiting joints in a map of a transportation system, and establishing a grid path map in which a transportation line is the same as that of entities of workshops; establishing a storage path of AGV between an entering joint and a target position; detecting feasibility of the path on spatial planning according to the exiting joint and the entering joint, and planning and establishing time window models M of all paths; taking transformation time of the paths as an unique assessment parameter for path optimizing in the time window models M, and selecting the path with the shortest transportation time as an optimal path; and combining a delivery path, the optimal path and the storage path to generate a complete transportation path, establishing a complete path and time window model, successively reading complete path information, and finishing dispatching management of AGV. The time window models are adjusted in time, the working efficiency of the system is greatly improved, a multi-path time window planning method is adopted, and the models are established to solve the collision problem.

Wireless communication networks utilize various communication protocols to exchange data between wireless network devices. Overlapping communication frequencies between data exchange protocols present a collision problem when data transmissions interfere with one another during wireless transit. A device for moderating transmission traffic in a wireless network where overlapping communication frequencies coexist is described to reduce or avoid interference caused by signal collisions.

The invention discloses a resource collision solution, device and storage medium in a V2X direct communication scene, and belongs to the technical field of communications. The method comprises following steps: receiving resource distribution information from n second facilities by a first facility, wherein n is an integer greater than 1; according to the resource distribution information sent by the second facilities, determining distributed resources of second facilities by the first facility; and if the target second facility distributed resources of n second facilities meet the resource collision requirements, executing resource collision resolving process by the first facility. Through the technical scheme mentioned above, resource to be occupied in the future in the V2X direct communication scene can be detected to determine whether resource collision happens in the future, the possibility to solve the resource collision problem is increased, the resource collision is maximally avoided, the success rate of transceiving messages in the V2X direct communication scene is guaranteed, and the high-frequency spectrum efficiency is improved.

The invention requests a certainty communication scheduling method for protecting industrial wireless network, relating to the field of industrial automatic control. Aiming at the problem that the existing industrial wireless network is unable to basically solve the beacon collision problem of multi-hop network, the invention redefines super-frame structure according to IEEE 820.15.4 standard. Competition stage, dedicated stage and dormant stage are defined in the super-frame structure. The communication scheduling between nodes is controlled according to the super-frame structure. The channel is changed once at the beginning of every super-frame by adopting the channel hopping technology, so that the channel sequence of the whole network is different and the take-off points of every cluster are different. The invention which solves the beacon collision problem of multi-hop network can be widely applied to the industrial wireless control network.

The invention discloses an unmanned aerial vehicle autonomous formation evaluation index and model prediction control (MPC) formation control method and belongs to the technical field of flight control. According to the method, a definition relevant to unmanned aerial vehicle autonomous formation, a computing method of the collision prevention probability of unmanned aerial vehicle autonomous formation and an unmanned aerial vehicle autonomous formation evaluation index are provided, and the MPC formation control method applicable to unmanned aerial vehicles is provided. The method solves the problem how to give out the collision prevention quantitative index which should be followed by design of an autonomous formation flight control system when it is known that the unmanned aerial vehicle autonomous formation scale is M, the average expectation distance between unmanned aerial vehicles in formation is dr, and the collision probability of the whole formation is required to be smaller than Pc. The method provides a quantitative index basis for engineering design of the unmanned aerial vehicle autonomous formation control system, and the collision problem the unmanned aerial vehicles in dense formation is solved.

A surface-launched acoustic wave sensor tag system for remotely sensing and / or providing identification information using sets of surface acoustic wave (SAW) sensor tag devices is characterized by acoustic wave device embodiments that include coding and other diversity techniques to produce groups of sensors that interact minimally, reducing or alleviating code collision problems typical of prior art coded SAW sensors and tags, and specific device embodiments of said coded SAW sensor tags and systems. These sensor / tag devices operate in a system which consists of one or more uniquely identifiable sensor / tag devices and a wireless interrogator. The sensor device incorporates an antenna for receiving incident RF energy and re-radiating the tag identification information and the sensor measured parameter(s). Since there is no power source in or connected to the sensor, it is a passive sensor. The device is wirelessly interrogated by the interrogator.

The invention provides a touch operation method of a touch screen and a touch screen device. The method comprises the steps that operation areas of the touch screen are divided, the divided operation areas are displayed at the same time on the touch screen, and each operation area is respectively corresponding to different touch operation modes; and the touch operation of the touch screen is acquired, the operation area where the touch operation happens is judged, the touch operation is identified according to the touch operation mode corresponding to the operation area, and the corresponding operation is executed. The touch screen can be divided into a gesture operation area and a screen sliding operation area. According to the invention, the surplus operation area of the screen is fully utilized, the collision problem when the screen sliding and gesture operation modes of the touch screen are used at the same time is solved, the screen sliding operation and the gesture operation can be carried out at the same state, and the operation convenience of the touch screen is improved.

The invention discloses a multi-line multi-public transport vehicle priority control method at a signal intersection. Aiming at the condition that a multi-line multi-public transport vehicle priority request collision problem at the signal intersection of a trunk line is increasingly prominent at present and the control effect of the present method is bad, the method selects two indexes of public transport passenger delay and passenger waiting delay at a downstream bus station to measure priority levels of the multiple priority requests. Then the delay corresponding to the multiple public transport vehicles of multiple lines applying for the same priority strategy is added. The priority level corresponding to the priority request with the large delay is high, and a higher passing priority is given. Thus the multi-priority request collision problem is solved. The control efficiency of the public transport priority is raised. The service level and the operation efficiency of the city public transport are improved. More passengers are attracted.

The invention discloses a wireless station access channel method and a wireless station access channel system. The method includes the steps of when a wireless station chooses to refuse or abandon a wireless frame and navigation (NAV) which is stored in local is not updated, acquiring a finish time of transmission of the wireless frame; when the transmission of the wireless frame is finished and can satisfy conditions which are arranged beforehand, being capable of conducting channel access. When the collision problem possibly exists in the wireless station, after the transmission of the wireless frame is finished, only by judging to obtain the conditions which are arranged beforehand, channel access only can be conducted, and when the wireless frame is in transmission, the problem that the wireless station and a hidden station generate transmission collision is avoided.

The invention discloses a multi-dimensional curved glass curtain wall designing, processing and mounting method based on BIM technology, and belongs to the technical field of glass curtain wall construction. The method comprises the following steps: selecting modeling software; modeling software being mainly Rhino 3D modeling software, and in addition, adding a series of auxiliary equipment and software plug-ins, namely a tower type workstation, a three-dimensional laser scanner, a BIM lofting robot and avisworks and Grasshopper parameterized plug-ins on the basis of Rhino 5.0 software. According to the invention, through using the BIM technology, the problems that grid division and block division of a multi-curved-surface glass curtain wall are difficult to coordinate and unify, technicalparameters of unit glass plates are complex, machining is difficult, and the period is long are solved. The installation collision problem of a building structure and a keel is solved, the coordination problem of the keel and a glass curtain wall is solved, the time for deepening design and material processing is shortened, the construction efficiency is improved, rework caused by some collisionand discordance problems is avoided, the rejection rate of material processing is greatly reduced, and the construction cost is reduced.

The invention discloses an assembled architectural design method based on BIM technology, which comprises the following steps: establishing a BIM database, drawing up a scheme, establishing a model, simulating a building unit, designing a standard floor, overall cooperation, splitting and optimizing components, simulating construction and field decoration; through the creation of the database based on the BIM technology, multiple styles of architectural models can be used for selection, diversified in appearance, giving households more choice, and the invention utilizes the technical support of the BIM application, Increased flexibility and diversity, so that that three-dimensional expression of the design can be realize, Reduce Drawing Quantity. At the same time, the invention not only can design and improve the single building, but also can design the building standard floor, simulate the whole unit, and realize the dispersion and assembly of each part of the building structure. Theinvention can effectively solve the possible collision problem between the professional and the precast members, and can simulate the construction process, find out the mistakes, omissions and defects, guarantee the concrete construction and shorten the construction period.

Wireless communication networks utilize various communication protocols to exchange data between wireless network devices. Overlapping communication frequencies between data exchange protocols present a collision problem when data transmissions interfere with one another during wireless transit. A device for moderating transmission traffic in a wireless network where overlapping communication frequencies coexist is described to reduce or avoid interference caused by signal collisions.

The invention discloses a multi-terminal on-line file synchronizing method. The method includes the steps: obtaining a server file list snapshot, wherein the server file list snapshot comprises server file list information when last synchronization ends; comparing the server file list snapshot with first terminal file snapshot information, and obtaining a first terminal file list snapshot, wherein the first terminal file list snapshot comprises first terminal list updating operation; obtaining a second terminal file list snapshot through a server, wherein the second terminal file list snapshot comprises second terminal file list updating operation; determining file identification and file operation which are to be synchronized according to the first terminal file list snapshot and the second terminal file list snapshot, and conducting file synchronization to a first terminal, a second terminal and the server according to the file identification and the file operation which are to be synchronized. The multi-terminal on-line file synchronizing method can effectively resolve the problem of real-time performance of file synchronization when multiple terminals are on line simultaneously and well avoids the collision problem of the file synchronization.

The invention provides a CSI-RS configuration method and a method, a base station and a terminal for measuring a channel. The method comprises the steps that the base station configures a plurality of CSI-RSs for the terminal through high-level signaling; the base station sends multiple sets of CSI-RS resources to the terminal, the multiple sets of CSI-RS resources are configured with at least one limiting cluster, and the limiting cluster is used for indicating that a terminal side cannot receive radio frames and / or subframes of the CSI-RSs. Accordingly, collision problems or untrue collision problems between the CSI-RS subframes and Paging can be resolved.

The invention relates to a complicated cluster walking type tower crane collision avoidance system and a monitoring method, and belongs to the technical field of collision avoidance safety monitoring of operation of a walking type tower crane cluster. The system comprises a power supply module, a lifting height sensor module, a trolley amplitude sensor module, a rotation angle sensor module, a large-arm tilt angle sensor module, a weight sensor module, an air velocity sensor module, a monitor apparatus module, a data collection module, a data output module, a relay control module, an alarm module, a Zigbee wireless communication module, a general packet radio service (GPRS) remote wireless communication module, and a global navigation satellite system (GNSS) receiver module. The complicated cluster walking type tower crane collision avoidance system is convenient to install, and strong in function, the monitoring on the operation state of a single walking type tower crane is achieved, meanwhile, the opposite positions among walking type tower crane groups can be displayed and judged, and the collision problem between the tower groups is effectively prevented. In addition, each tower crane also can be remotely monitored and managed.

The invention discloses a snake-shaped joint mechanism used for a single-hole minimally invasive robot. The snake-shaped joint mechanism comprises a snake-shaped joint and a snake-shaped framework structure; the snake-shaped joint comprises elastic thin sheets; the elastic thin sheets comprise an upper-layer elastic thin sheet; the upper-layer elastic thin sheet and a lower-layer elastic thin sheet are buckled and connected to form a middle channel; a conjugate curve structure is formed by the upper-layer elastic thin sheet and the lower-layer elastic thin sheet; a middle-layer elastic thin sheet is slidingly connected into the middle channel; the rear part of the middle-layer elastic thin sheet is connected with a linear motion driving source through a middle-layer connection block; the snake-shaped framework structure comprises a plurality of snake-shaped units with the same structure; hollow channels of the plurality of snake-shaped units jointly form a snake-shaped channel; the elastic thin sheets of the snake-shaped joint are mounted in the snake-shaped channel; the linear motion driving source controls relative sliding of the middle-layer elastic thin sheet so as to control the motion of the snake-shaped framework. The structure is more compact and the assembly is more convenient; a collision problem of tools in an operation process can be more effectively avoided.

Embodiments of the invention disclose an information reporting method, a resource allocating method, an information reporting device and a resource allocating device in an Internet-of-vehicles system in order to solve the problem that the probability of collision between node equipment is high currently. The resource allocating method comprises the following steps: network-side equipment allocates sub-frame resources to node equipment initially accessing a cell, and notifies the node equipment initially accessing the cell of the initially allocated sub-frame resources; and for the node equipment already accessing the cell, the network-side equipment determines colliding node equipment, reallocates sub-frame resources to the colliding node equipment and notifies the colliding node equipment of the reallocated sub-frame resources. As the network-side equipment schedules resources for the node equipment accessing a cell in a centralized manner, time-division resource multiplexing between node equipment and surrounding node equipment needing communication is ensured, the system capacity is improved, the resource collision problem between colliding node equipment can be solved timely and effectively, and the performance of communication between node equipment of the system is improved.

The invention discloses an automatic boundary layer calculation-orientated two-dimensional hybrid grid generating method, which comprises the following steps: embedding an input closed curve into triangular meshes by means of a restriction Delaunary triangularization method to obtain topological approximation edges approximating these curves and triangular meshes inside the curves, outwards propelling a topological approximation edge set as a boundary curve, automatically capturing a topological structure of the propelled new boundary and filling a quadrangular mesh of a propelling region to finally obtain a quadrangular / triangular hybrid mesh meeting the condition and the quality requirement. The automatic boundary layer calculation-orientated two-dimensional hybrid grid generating method is simple and easy to realize, good in reliability, and capable of automatically treating the boundary topological change and collision problem in an propelling process, has no special requirement for an initial two-dimensional closed curve, adapts to the requirement of dense computational grids required by large velocity gradient change in a flow field around a boundary layer, can generate an unstructured triangular mesh with flexible scale change in a place far away from the boundary layer, and can provide the high-quality mesh for correlation calculation of computational fluid mechanics.

The invention provides a mathematical model construction method and solving method for a single-star task planning problem. According to the single-star multi-turn imaging satellite task planning problem, the problem is reasonably simplified and assumed, a mathematical model is constructed, and a software solving frame and nine branch function modules are introduced, wherein a heuristic sorting strategy is adopted in the sorting module, a time window subtractive algorithm is innovatively adopted in the activity arrangement module, the collision problem of time windows is better solved, and the utilization rate of the time windows is improved, so that feasible solutions approach the optimum.

The embodiment of the invention provides a label positioning method, system and device. The method applied to any label in a target area comprises the following steps: broadcasting a request frame inthe target area; receiving a first beacon frame from the master base station, and generating the first beacon frame for the selected request frame after the master base station receives at least one request frame broadcasted by a plurality of tags; in response to the received first beacon frame, sending a first data frame to the master base station and the plurality of slave base stations, the first data frame carrying a time point at which the first data frame is sent from the tag; and keeping the silent state of not broadcasting the request frame within the preset time length, and finally, after receiving the data frame sent by the base station, enabling the server to position the label according to the time point in the data frame. Because the tag does not broadcast the request frame after entering the silent state, the main base station selects one request frame again to respond, and the processing time of the request frame is inevitably later than that of the last selected tag, sothat the collision problem is solved.

The invention discloses a taxiway path optimizing method based on collision detection. In the sliding process of an aircraft, possible cross point collisions, butt collisions and rear-end collisions are detected, and a sliding path is optimized through an improved A* algorithm on the basis of avoiding the collisions. According to the method, the collision problems possibly happening to the aircraft in the sliding process are fully considered, the collisions are avoided, on the premise of guaranteeing safety, the aim of the shortest sliding path is achieved, and then the airport surface running efficiency is improved.

The invention discloses a light transmission hypothesis based intensive autonomous aerial vehicle formation control method, and belongs to the technical field of control on autonomous formation of unmanned aerial vehicles. In order to solve the problem that collision probability during intensive aerial vehicle formation is difficult to lower in existing multi-aerial-vehicle formation technology, on the basis of researching the group anti-collision problem, particularity of intensive group anti-collision is analyzed, a light transmission hypothesis of an intensive group anti-collision mechanism is proposed according to group behaviors of animals in the natural word, and a light transmission generation protocol is designed for generating light transmission coefficients of each node in representation formation; the light transmission hypothesis and a model predicative control formation controller are combined, a local predictive model for formation is established, and an LMPC ( local model predictive control) formation controller is designed; the LMPC formation controller is combined with the light transmission coefficients, a light-transmission avoidance algorithm allowing each node to follow the light transmission hypothesis to perform collision avoidance behaviors is given, and collision probability in case of intensive formation is lowered effectively.

The invention provides a method for realizing a dictionary search of Trie tree based on one-dimensional linear space. The method comprises the following steps: through generating dictionary data of the Trie tree of the one-dimensional linear space, determining a to-be-queried vocabulary entry key according to the user input, and realizing the query according to the current state of the vocabulary entry key. Building the dictionary data of the Trie tree under the one-dimensional linear space increases the dictionary loading and searching speed, and can quickly search all prefix words of the vocabulary entry; besides, realizing the dictionary search of Trie tree based on one-dimensional linear space can solve the collision problem caused by inserting a new state existing in the Trie tree building process by the traditional Trie tree dictionary data search, and can avoid the problem of the move of the vast dictionary data caused by the conflict.

A transmission lifting system for planting crops comprises a rack, a track, a lifting rail, a pushing device driven by a translation power source, a lifting device driven by a lifting power source, a hoisting basket, a protection device and a control device; the lifting power source is arranged at the top or upper position of the rack and drives the lifting deice to move up and down along the lifting rail; the pushing device is arranged on the track; the hoisting basket circularly moves in the track by the lifting device. The circular movement of the hoisting basket for planting crops in the track is realized by the match of the lifting device and the pushing device, so the crops grow in the same environment, and the whole quality is improved; meanwhile, the protection device is arranged, the collision problem caused by rolling and shaking in the lifting process is avoided, the stability of the hoisting basket during transferring is greatly improved, and the collision is avoided; guiders are arranged at two ends of the track to be jointed with jointing wheels of the lifting device, so the jointing stability is ensured.

The invention relates to a control method of a gas heater, which comprises a heater body. The invention also comprises at least two remote control units. The control method comprises the following steps: the step 1: an operation token and a distribution module are arranged in a communication module; the step 2: a master control module judges whether a local control order is input into an operation control module, if the local control order is input, the master control module receives and executes the local control order sent by the operation control module, and the step 2 is cycled; and if the local control order is not input, the next step is executed; the step 3: the master control module judges whether a primary remote control order of the operation token is input or not, if the primary remote control order is input, the step 4 is executed; if not, a distribution module distributes the operation token to the remote control unit that applies for the operation token first according to the chronological sequence and a first receiving module receives the primary remote control order of the remote control unit, and finally, the step 3 is cycled; the step 4: the master control module executes the primary remote control order of the operation token and a timer is opened; after the timing time of the timer becomes due, the operation token is released, and the step 2 is back. The invention has the advantages that the multipoint control method to the heater is realized and the collision problem of the multipoint control is solved.

The invention discloses a vehicle emergency braking system. An image acquisition unit and a radar acquisition unit outputs an acquired signal for a barrier in front of a vehicle to a decision-making control unit; the decision-making control unit outputs a control signal to an execution unit; and the execution unit comprises an accelerator control sub unit and a braking control sub unit. According to the vehicle emergency braking system, vehicle and personnel detection and tracking are more accurate by fusing a visual technology and a laser radar technology, safety under various weather conditions is better guaranteed, traffic accidents are reduced, the safety is improved, and mental pressure of a driver is alleviated. The system can achieve an automatic cruise function at a high speed, braking is implemented actively under dangerous conditions, and emergency braking is adopted when a collision danger occurs; and meanwhile, vehicle automatic cruise is achieved while a collision problem is solved.

The invention provides a method for implementing trans control protocol (TCP) connection management by using a multistage memory searching mode. The method comprises the following steps of: establishing a hash table according to four groups of TCP connection, and plugging a bucket structure outside each table item; and storing a buffer area address for storing the link state in the bucket item, and reading and connecting current state information through the buffer area address. The method realizes connection management by using hardware; because the hash table only records address information, the required memory space is small; and more hash table items can be established in the limited memory space so as to effectively solve the hash collision problem.

An embodiment of the invention discloses a data transmission method and a base station, which are used to solve the collision problem in the data transmission process under the condition of coexistence of scenes of different processing delays. The method comprises the following steps: the base station receives quality of service (QoS) parameters of at least one service, wherein the QoS parameters comprises any one or the combination of more than two of time delay sensitiveness, reranking indication parameters, RTT indication parameters or TTI indication parameters, the time delay sensitiveness being used for indicating different delay requirements of various data in the at least one service, the reranking indication parameters being used for indicating whether the order of the data in the at least one service needs rescheduling; and the base station carries out configuration on wireless bearing according to the QoS parameters and transmits the data according to the wireless bearing obtained after configuration.

The invention relates to a device for realizing security of an image-monitoring and anti-collision integrated tower crane, in particular to device for realizing security of a tower crane by using a variety of sensors. The invention solves the anti-collision problem in operation of the conventional tower crane. A voltage is generated according to the weight of a heavy object hung on a gravity sensor, a current of 0-20 mA or 4-20 mA is generated by a operational amplifier, the current is converted into a voltage by using a resistor, a sampled voltage is converted into a pulse by using a V / F (Voltage / Frequency) conversion chip, the pulse is transmitted to a processor for processing through an optical coupling isolating circuit, and the processor obtains the weight of the object on a hook of the tower crane according to the number of the pulses sampled in a unit time.