96 results about "Rest energy" patented technology

The invention relates to an energy perception routing algorithm used for a wireless sensing network, which comprises the steps as follows: 1, a two-tier clustering mechanism based on a cellular network structure is realized for a wireless sensing network; 2, cluster heads are dynamically selected according to the rest energy of nodes and the central distance from the nodes to a cell to form a backbone network which processes and forwards data, wherein the nodes not serving as the cluster headers and not implementing data transmission enter a dormant state; and the nodes serving as the cluster headers manage the nodes in the clusters; and 3, a limited flooding mechanism is used for establishing routing taking a convergent node as a final target node; a routing table is established between the cluster headers according to the minimum path overhead between the clusters and the rest energy of the cluster headers; and optimal routing can be established for the nodes in the whole wireless sensing network only through one broadcasting by reasonably adjusting the parameters. The energy perception routing algorithm used for the wireless sensing network can improve the lifecycle of the whole wireless sensing network, thus satisfying the application of the wireless sensing networks sensitive to energy.

The invention discloses an energy priority node clustering method for a wireless sensor network. The method comprises the following steps that: after network deployment is finished, a base station starts running all nodes in a network by transmitting a broadcast signal; each started node in the network computes own threshold value for becoming a cluster head; the nodes of which rest energy is more than or equal to the average energy of the network and which generate random numbers lower than the threshold values in the network are selected to be the cluster heads; the cluster heads broadcast own cluster head messages to the whole network, and each ordinary node computes own distances away from the cluster heads according to received signal strength after receiving the cluster head messages, and is added into the closest cluster as a cluster member; and the cluster heads allocate time division multiple access (TDMA) timeslots to each cluster member, so that each cluster member performs communication according to the allocated timeslots. By the method provided by the invention, the time to live of the network can be remarkably prolonged, and performance remarkably higher than that of a low energy adaptive clustering hierarchy (LEACH) protocol is ensured.

The invention asks for protecting a cross-layer and bi-directional routing method in a wireless sensor network and relates to the technical field of communication. The existing wireless sensor network has the disadvantages that no downlink route is established in route establishing process, function of inquiring a sink node can not be supported, extra-cost occurs when energy information is updated by adopting node energy as the routing standard, and the cost of controlling the system is slightly larger. The method adopts source routing and cross-layer information share manner and uses smaller cost to establish the downlink route from the sink node to a sensor node without using special control group, the function of inquiring the sink node is added, and regular acquiring, releasing and updating of the rest energy information of the node are realized, when routing, the hop number and the rest energy of the node are both used as the measure standards, the energy consumption when forwarding the node is balanced when reducing the node energy and the network bandwidth consumption, and the service life of the wireless sensor network can be prolonged, and the network bandwidth utilization rate is increased.

The invention provides a method for controlling low-voltage ride-through of the grid-connected converter of a wind-driven generating set. On the basis of back-to-back voltage or current-typed grid-connected converter, a motor-side converter detects the middle direct current voltage; a voltage adjuster controls the middle direct current voltage to follow with the middle direct current voltage instruction value; a torque adjuster controls the practical torque to follow with the torque instruction value; an active power adjuster controls the grid-side converter and leads the grid-connected active power to follow with the active power instruction value. The transfer of the dump energy is realized by the coordinated control of the motor-side converter and the grid-side converter, elements such as additional resistance and the like are not required so as to consume the rest energy, thus ensuring that the wind-driven generating set does not run without the grids during the falling period of the network voltage at the access point. The method improves the efficiency of the unit, reduces the energy loss, simplifies the structure of the system, reduces the volume of the device, reinforces the compactness of the structure and reduces the cost of the device.

A method of rating the intensity of game play of a video game based on energy expenditure of a user playing the video game including the steps of selecting the video game, determining whether the video game requires the user to expend energy in excess of resting energy rate, testing the video game by having a plurality of users play the video game, measuring energy expenditure of the plurality of users, calculating energy expenditure of each of the plurality of users, calculating an average energy expenditure of the plurality of users and categorizing the video game based on the average energy expenditure as low intensity, moderate intensity or high intensity.

The invention provides a method for balancing layered energy consumption of a wireless sensor network facing to perception events, which relates to a method for saving the energy consumption for the wireless sensor network and solves the problem of balancing the energy consumption of the wireless sensor network which is deployed intensively under the drive of the perception events. A basic system comprises intensively-deployed wireless sensor network nodes, cluster head nodes determined through an election strategy, the perception events randomly happening in the network, and base station nodes deployed on the network edge; on the basis of the perception events happening in a network deployment environment, a plurality of layered sensing collections centering on the cluster head nodes are constructed, and according to the level in which each node is positioned in the sensing collections, the rest energy and the concrete loading condition of each transmission link in the collections, corresponding task scheduling and transmission path selection are performed to balance the energy of each node; and simultaneously, centering on the base station nodes, an optimized data transmission path among the sensing collections is established, and the energy consumption of the entire network is further balanced and the network life cycle is prolonged by dynamically changing a transmission cycle of cluster head data.

The invention relates to a method for selecting a collaboration relay node, which comprises the following steps of: broadcasting RTS information comprising current energy of a source node and an address of a destination node at the source node; calculating the rest energy after participating the collaboration by self and the rest energy of the source node according to the current energy and the channel state of the source node at a potential relay node which receives the RTS information, judging whether the self rest energy is lower than the rest energy of the source node or not and participating the collaboration competition if the result is positive; receiving competition information sent by the potential relay node at the destination node, and selecting the potential relay node which leads the rest energy of the source node maximum as the relay node and broadcasting CTS information to notify the relay node to participate the transmission. The method considers the energy consumption of a whole network for implementing the whole application, utilizes the collaboration transmission technique to maximize the rest energy of all nodes for participating the transmission in each transmission and leads the rest energy of all nodes in the network to obtain the balance, thereby maximizing the life cycle of the whole network.

The invention discloses a data transmission method, a node and a system in a wireless sensor network. The method comprises the following steps that: a source node creates a channel according to a routing table when determining to transmit data to a destination node, wherein the routing table comprises a neighboring node identifier, link quality from the neighboring node to a current node, rest energy of the neighboring node and hop count of the neighboring node, and the channel comprises a main path node and a channel node; the source node divides the initial data to be transmitted into specified amount of data packets, and performs network coding on the specified amount of data packets; and the source node transmits the coded data packets through the channel. With the data transmission method, the node and the system in the wireless sensor network, the problem of higher energy consumption for data transmission in the wireless sensor network is solved, and the reliability of transmission is also ensured.

Method to determine in a quantitative way stored amounts of radiation energy making use therefor from a personal monitor storing absorbed incident radiation energy in a storage phosphor panel storing radiation energy originating from radiation having a wavelength of 350 nm or less, wherein the panel is covered with an optical filter absorbing radiation having a wavelength of 350 nm or more during exposure and present in a housing, and from an apparatus for readout of the storage phosphor panel by the steps of entering the personal monitor in a read-out apparatus, removing optical filter covering the storage phosphor panel, adding stimulating energy to the storage phosphor panel, digitally detecting energy released from the storage phosphor panel by a detector and erasing stored rest energy.

The invention relates to a generating method used in electric energy gage impulse in the field of electric power parameter measuring technology. It first dose zero point detecting to the voltage signal and the detecting result is used to control the computing of the period energy and the current time power increment; when detecting a new zero point, it adds the front period energy in the electric rest energy to compute the period average power so as to linear forecast the current period current time electric rest energy; when the electric rest energy is over an electric energy gage impulse corresponding electric energy, it outputs an electric energy gage impulse and takes out a electric energy gage impulse corresponding electric energy value from the electric rest energy at the same time.

Using discharging and regeneration charging capacity distribution describes discharging current mode of electric motor car. Based on status of available total capacity of accumulator, rest energy of accumulator is evaluated. The method include following steps: measuring temperature, discharging current and regeneration charging current of accumulator; based on selected several current ranges and corresponding currents at upper and lower limits; accumulating the measured currents creates discharging and charging capacity distributions; forming the vector composed of discharging and charging capacity distributions and temperature of accumulator; normalizing the vector to meet the requirement as a input of neuro-network model; based on status of available total capacity of accumulator, applying neuro-network model evaluates surplus capacity. Considering discharging current mode, the invention evaluates surplus capacity accurately.

The invention provides a mobile assistance WSNs routing method based on unequal clustering, comprising an initial phase, a clustering phase, an RPs (rendezvous points) determining phase and a routing phase. The initial phase is a network deployment phase and determines the movement track of a sink. The clustering phase considers factors such as the distance gradient between a point and a mobile sink, the rest energy of a candidate cluster head, etc. The RPs determining phase discusses the selection number and width of an RPs set, and specific sets, and simplifies a 0-1 integer programming model specific to the selection problem of an RP salve cluster head point set, wherein an approximately optimal RPs slave point set of an integer programming solution is obtained through a genetic algorithm. The routing phase employs multiple levels of routing, wherein the cluster head collects cluster member message data (including data fusion) and plays the role of a relay point, and PRs buffer messages transmitted by cluster head points into the mobile sink.

The invention provides a wireless multimedia sensor network node clustering method based on related coefficients, comprising the following steps: utilizing related coefficients of a node to cluster; and electing a cluster head node according to node rest energy and node transmission cost; and therefore, the network management can be efficiently performed, and the redundancy of transmission data is reduced. According to the scheme, the related coefficients of the node are firstly obtained, a related coefficient matrix of the whole network is utilized for constructing clustering, then the election of a cluster head based on cost is performed inside a cluster, and the switching of the cluster head is performed at a proper moment. Through the scheme, the clustering problem in the wireless multimedia sensor network is efficiently solved, cluster head election and switching mechanism is provided, the node energy consumption inside the network is balanced, and the life cycle of the whole network is prolonged.

The invention belongs to the technical field of electric automobile charging, and particularly relates to a compensating charge method. The method divides the braking feedback energy into two parts, one part of energy is used for charging an electrokinetic cell and is recycled, and the other part of energy is used for the compensating charging of an auxiliary cell by an inverter charging circuit and is recycled; and according to the test result carried out by a testing circuit to test whether the braking feedback energy, the rest energy of the auxiliary cell and the rest energy of the electrokinetic cell exist or not, the level of the braking feedback energy which is distributed into the auxiliary cell for the compensating charging thereof is controlled. The invention also provides a circuit for realizing the charging method. The invention makes up the disadvantage of the conventional mode of braking energy feedback charging that the braking energy can only be recycled by the electrokinetic cell, and improves the energy utility ratio of the electric automobile.

The invention belongs to a geophysical exploration technology, and relates to a diffracted wave separating and imaging method based on reflected energy prediction. The diffracted wave separating and imaging method comprises the following steps of performing common-angle prestack depth migration on shot records to obtain a dip angle region common-imaging point gather after seismic data are acquired; predicting reflected wave from a full-wave-field common-imaging point gather according to significant difference of tracing patterns of the reflected waves and diffracted waves in the dig angle region common-imaging point gather; performing image similar matching on a predicted dip angle gather containing reflected energy only and a full-wave-field dip angle gather so as to remove reflected energy in a full wave field; using rest energy as diffracted response; and superposing the dip angle region common-imaging point gather which is pressed by a reflected common-phase axis along the dip angle direction to obtain an imaging result comprising diffracted energy mainly. The diffracted wave separating and imaging method based on the reflected energy prediction is a diffracted wave separating and imaging technology which is practical and is convenient to operate.

The invention relates to a vehicle energy supplementing reminding method and a vehicle energy supplementing reminding device, which are used for achieving the goal of intelligently reminding a user of supplementing energy for a vehicle according to the rest energy quantity of the vehicle and the road condition information, so that convenience is provided for the user to go out. The method comprises the following steps that the rest energy quantity of the vehicle and the road condition information of a navigation road are obtained; the position capable of being reached by the vehicle on the navigation road by the rest energy quantity is determined according to the rest energy quantity and the road condition information; when the position is before the terminal point of the navigation road, at least one service station on a preset road between the vehicle and the position is determined to be a targeted service station; when the condition that the vehicle reaches the preset distance part before the target service station, reminding information is output. The technical scheme achieves the effect of intelligently reminding the user according to the rest energy quantity of the vehicle and the road condition information; the condition of insufficient energy source quality since people do not clearly know the road condition is avoided, and the traveling of the user is convenient.

The invention provides a routing method of a small-scale wireless sensor network, belongs to the field of routing of a wireless sensor network, and solves the problem that a Harmony search algorithm in the prior art cannot be directly used for solving the routing of the wireless sensor network. The routing method comprises a step of transmitting global information, a step of sending data packet, a step of transmitting the data packet and a step of updating rest energy information. Through improving the encoding manner and the candidate Harmony generation method of the existing Harmony search algorithm, with the consideration of both path energy consumption and path length, the energy consumption of the whole network can be balanced effectively, and the service life of the whole network is prolonged significantly.

The invention discloses a relay selection method in an energy constraint cooperative communication system. The relay selection method comprises the following realization steps that (1) M source nodes utilize K energy constraint relay nodes to carry out cooperative communication with target nodes D; (2) one relay node with the least rest energy is found and is marked as R*; (3) the life cycle T<S1R> of a link from S1 to R* to D is constructed; (4) the source nodes are ranked according to the T<S1R> in sequences from small ones to large ones, a new set S is obtained, a node counter is set, in addition, the initial value m of the node counter is set to be zero; (5) m is increased by 1, and the life cycle T<SmRj> of the link is constructed; (6) the relay node corresponding to the maximum value of the T<SmRj> is marked as Rm; (7) steps (5) to (6) are repeated until m is equal to M, the relay nodes Rm are ranked according to subscripts in sequences from small ones to large ones, and a new set R is obtained; and (8) the resource nodes in the set S are selected to carry out cooperative communication with the relay nodes with the same subscripts in the set R. The relay selection method has the advantages that the energy efficiency is high, the realization complexity is low, and the relay selection method can be used for the cooperative communication system in energy constraint environment.

The invention relates to a multi-stage energy heterogeneous network deployment method. In a network model establishing stage, a circular layered network model that nodes are distributed randomly and clustered uniformly is constructed in the invention; temporary cluster heads are selected by adopting a Leach algorithm; then, influence of network nodes on the scale difference of various clusters in a network in a random distribution manner is analyzed; a cluster scale balancing algorithm is provided, such that the number of nodes of various clusters can be balanced; the energy consumption of the cluster heads can be balanced; construction of temporary clusters is completed; in a data routing stage, the problems of the temporary clusters constructed through the Leach algorithm are considered in the invention; formal cluster heads are re-selected in the temporary clusters; a network routing path is further optimized; then, an optimal relaying cluster head node is selected according to the rest energy of the cluster heads and the distance between the cluster heads; in the last network implementation and deployment stage, the energy consumption rates of various positions in the network are precisely calculated based on the network model, an energy consumption model and routing selection; initial multi-stage energy heterogeneous network deployment is finally completed by utilizing integer programming ideas; and the specific deployment positions of N nodes in the network can be determined.

The invention discloses a cluster establishing and routing method for a cognitive radio sensor network without a common control channel. A plurality of clusters which are uneven in size are established through a plurality of turns of cluster establishing operation according to the near-to-distant sequence to an SN (sink node); except for sensor node SUs (secondary users) directly communicating with the SN, other SUs are covered with a unique cluster; in each turn of cluster establishing operation, cluster radius calculation, cluster head (CH) selection, cluster channel selection and cluster structure formation are sequentially executed; in the cluster radius calculation process, three energy consumption situations are analyzed, wherein the three situations comprise the energy consumption situation of a node near to the SN, the energy consumption situation of a cluster head of the cluster nearest to the SN, and the energy consumption situation of cluster heads of the clusters far away from the SN, and energy consumption of the nodes in the network is balanced by establishing an uneven cluster. The cluster head is selected by comprehensively considering the rest energy of the nodes, the number of available channels and the distance with an upstream cluster head. The energy consumption of the nodes in the network can be balanced easily, and the service life of the network can be prolonged.

The invention provides a method for calibrating a battery state of charge based on a battery aging characteristic. The method comprises the steps of establishing a calculation regression model of actual battery pack full electric capacity about traveled distance and charge-discharge frequency, working out the actual full electric capacity of a current battery pack according to the calculation regression model, and obtaining the SOC value of the calibrated current battery pack according to the actual full electric capacity of the current battery pack. According to the method, the state of charge is calibrated according to the aging characteristic of the battery, so that estimation of the rest energy of the battery pack is more accurate, a driver is guided to do correct driving actions on different situations, accidents caused by energy of a vehicle are reduced, and convenience is brought to travel of the driver.

The invention belongs to the technical field of wireless sensor network energy-saving route, and in particular relates to a mode for mutually exchanging energy information data packets through a local range node in a wireless sensor network, so that the node acquires the sequence of rest energy of the node in surrounding k hop nodes, and reduces the probability of selecting a low energy node as a routing node, and the energy is used evenly and the life cycle of the network is prolonged.

The invention discloses a WSNs clustering routing method under long and narrow topology. The method comprises the following steps that at a cluster head campaigning stage, the cluster head campaigningtime is set for each node according to the relative rest energy and the distance between the gathering nodes; when the time is shorter, the campaigning succeeding possibility is higher; at the cluster forming stage, the nodes select to add the cluster with the shortest distance and the greater communication radius according to the stored cluster head information; at a multi-hop path building stage, on the basis of the relative rest energy and energy expenditure index, the cluster head node builds the optimum multi-hop path based on the minimum spanning tree. The WSNs clustering routing methodunder the long and narrow topology can realize more effective data transmission at each routing stage; the network transmission efficiency and the node load balance can be improved, so that the energy consumption of each node can be balanced; the network life period can be prolonged.

A method for constructing a route capable of prolonging the service life of an IPv6 wireless sensor network includes the steps that an intermediate node receives and analyzes a DIO message to obtain a DODAGID and an ID, the rank and the rest energy level of a sending node and an RSSI is obtained; the DODAGID, the rank and the rest energy level of the intermediate node are calculated; an LQI between the sending node and the intermediate node is figured out according to the RSSI; a father node list is created, and the DODAGID, the LQI and the ID, the rank and the rest energy level of the sending node are preserved; the optimal path is worked out through an objective function by means of measurement information of the rank of a sender, the rest energy levels and the LQI and corresponding constraint conditions, and a first choice father node is determined; the DIO message is established and broadcasted. Route measurement of the ranks, the rest energy levels and the LQI are introduced and organically combined to establish the route, and the service life of the network is greatly prolonged on the premise of guaranteeing that data are interacted quickly and stably.

The invention provides a wireless sensor network data flow rate shunting routing method based on multipath, and relates to a wireless sensor network technology method. According to the method, an MDFD data flow rate shunting method is used for balancing the energy consumption of network nodes, so that all network nodes can maintain the balanced energy consumption, so that the network scales can basically maintain unchanged in the survival period; in order to save the calculation expenditure of sensor nodes during the proper path selection, the MDFD uses the reliability evaluation parameter for selecting the proper path; the node state information is used for calculating the reliability evaluation value of the single node; when the node rest energy is considered, only the nodes being about to take part in the next hop of routing campaign are considered. The method has the advantages that the energy consumption problem of the wireless sensor nodes can be effectively solved; the life period of a wireless sensor network can be effectively prolonged; the condition of work resistance of the wireless sensor network caused by the energy consumption problem is relieved.