Temperature detection device and method for conveyor belt

A temperature detection method for a conveyor belt for detecting a temperature of the conveyor belt by using a passive IC tag embedded in a conveyor belt, a detector configured to wirelessly communicate with the IC tag without contacting the conveyor belt, and a calculation unit connected to the detector to cause a returned radio wave returned from the IC tag in response to a transmitted radio wave transmitted from the detector toward the IC tag to be received by the detector, the temperature detection method comprising:

• grasping in advance correlation data between an electrical resistance value in the IC tag and a temperature of the IC tag when the IC tag is activated by receiving the transmitted radio wave,
• transmitting a transmitted radio wave from the detector toward the IC tag embedded in the conveyor belt mounted between pulleys and running,
• receiving, by the detector, data of the electrical resistance value through a returned radio wave returned from the IC tag in response to the transmitted radio wave,
• calculating, by the calculation unit, a temperature at a position of the conveyor belt where the IC tag is embedded in accordance with the data of the electrical resistance value received and the correlation data, and
• grasping, by installing a plurality of the detectors evenly around the entire circumference of the conveyor belt between the pulleys at intervals in a longitudinal direction of the conveyor belt, a temperature distribution in the longitudinal direction of the conveyor belt indicating a temperature of the conveyor belt running at detection positions at which each of the detectors is disposed, and
• wherein the plurality of the detectors are disposed at intervals of 10 m to 30 m in a longitudinal direction of the conveyor belt between the pulleys.