Method for charging wireless sensor networks at multiple charging nodes

• Main Authors: YUAN LIFEN, ZHAO DEQIN, HE YIGANG, CHENG ZHEN, SUN YESHENG, WU LEI, LUO SHUAI, CHEN PENG, YUAN ZHIJIE
• Format: Patent
• Language: English
• Published: 30.09.2015
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention discloses a method for charging wireless sensor networks at multiple charging nodes. The method include steps of (1), building a WSNs (wireless sensor networks) model; (2), partitioning domains of charging trolleys; (3), charging the wireless sensor networks by the various charging trolleys. The step (3) particularly includes (a), initializing total amounts l of warning nodes and serial numbers j of warned nodes; (b), receiving warning signals, updating values of the total amounts l of the warning nodes and the serial numbers j of the warned nodes, generating the shortest charging paths s and computing energy discriminant vectors; (c),executing charging tasks at the l warning nodes according to the corresponding shortest charging paths s if vector elements Q are smaller than or equal to 5%*B, or continuing updating the values of the total amounts l of the warning nodes and the serial numbers j of the warned nodes if the vector elements Q are larger than 5%*B; (d), executing the charging tasks; (e), judging whether the charging trolleys need to return parking areas to supplement energy or not, enabling the charging trolleys to return the parking areas to supplement the energy if the charging trolleys need to return the parking areas to supplement the energy, or continuing updating the values of the total amounts l of the warning nodes, the serial numbers j of the warned nodes and the vector elements Q if the charging trolleys do not need to return the parking areas to supplement the energy. The total amounts l of the warning nodes and the serial numbers j of the warned nodes are equal to zero after being initialized. The j in the vector elements Q can be 1, 2, ..., and l. The method has the advantages that charging strategies can be adaptively changed according to change of energy of sensors, the various charging trolleys are independent from one another, and the method is simple and reliable.