Patent ID: 8576665

Claim:
A wireless sensor network comprising: a master control terminal; and a plurality of wireless sensor nodes directly communicating with the master control terminal and configured as a plurality of underwater wireless sensors, with each underwater wireless sensor comprising a floating-diving device enabling the underwater wireless sensor to submerge to a first predetermined water depth in response to a predetermined condition, a sensing device converting a plurality of environmental parameters into a plurality of environmental messages, a micro controller connected to the floating-diving device and the sensing device, and receiving the environmental messages and sending a command signal including the environmental messages, a communication device connected to the micro controller, receiving the command signal sent from the micro controller, sending the command signal to the master control terminal, receiving an external message including a second predetermined water depth from the master control terminal, and sending the external message to the micro controller so that the micro controller performs a corresponding operation and sends out a control signal to the floating-diving device to enable the underwater wireless sensor to move to the second predetermined water depth, and a solar power generator generating power, storing the power, and supplying the power to the underwater wireless sensor, the plurality of underwater wireless sensors including first and second underwater wireless sensors, with the first underwater wireless sensor being located at a working water depth and having a working radius, and when the power of the first underwater wireless sensor is insufficient, the first underwater wireless sensor moves to a specific area so that the solar power generator absorbs external light to be charged, and the second underwater wireless sensor moves into the working radius.