US 8,138,945 B2 · Sensor node

Abstract

There is disclosed a sensor node capable of transmitting and receiving a large amount of data or data desired to be reliable without missing data, while preventing battery exhaustion and unnecessary compression of the transmission bandwidth. A name-tag type sensor node includes a detector for detecting connection of an external power supply. When the detector detects that the external power is supplied, the name-tag type sensor node transmits and receives a large amount of data, such as bulk transmission data, at an increased frequency by means of a data selector, a communication timing controller, and a wireless communication controller. Alternatively, the name-tag type sensor node transmits and receives the data desired to be reliable, such as rewriting data of firmware.

Claims20

Dependent claims

A sensor node for measuring and transmitting physical quantities, comprising:

a controller for controlling the measurement of the physical quantities by driving a plurality of sensors;
a wireless communication circuit for transmitting physical quantity data obtained by the controller from the plurality of sensors;
a battery for supplying power to the controller, the wireless communication circuit, and the sensors;
and
a detector for detecting that power is supplied from an external power supply unit for supplying power to the controller, the wireless communication circuit, and the sensors, or for charging the battery,
wherein, when the detector detects that power is supplied from the external power supply unit, the controller controls to increase the frequency of communication in the wireless communication circuit.

3 more elements

Dependencies are inferred from the claim text.

Sensor node

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Sensor node

Life of this patent

Abstract

Claims20