Patent ID: 7149622

Claim:
A system for measuring temperature of a plurality of pistons of an engine, comprising: a plurality of sensor units including at least one thermocouple and a signal processor, wherein one end of the at least one thermocouple is mounted to at least one portion of the piston and the at least one thermocouple generates a voltage signal corresponding to a temperature of the portion, and the signal processor generates a piston temperature signal corresponding to the temperature of the piston on the basis of the voltage signals received from the thermocouple; a plurality of Bluetooth units receiving the piston temperature signal from the sensor units and having at least two communication members apart from each other, the piston temperature signal being transmitted from one of the communication members to the other via wireless communication in Bluetooth communication type; and a power supply unit supplying power to the sensor units and the Bluetooth units, wherein the plurality of sensor units and the plurality of Bluetooth units are provided in a number corresponding to a number of the plurality of pistons such that temperatures of the plurality of pistons can be simultaneously measured.