US Patent 7859405 Wireless sensing device and wireless network sensing system

A wireless sensing device includes a processing module, a wireless communication module, at least one sensing element, a power module and a power-monitoring module. The wireless communication module is electrically connected with the processing module to transmit or receive a wireless communication signal. The sensing element is electrically connected with the processing module to transmit a sensing signal to the processing module. The power module is electrically connected with and supplies a power to the processing module, the wireless communication module and the sensing element. The power-monitoring module is electrically connected with the processing module and the power module to transmit a power-monitoring signal to the processing module.