Temperature detection device and method for conveyor belt
A temperature detection device and method that can simply and accurately detect the presence or absence of abnormal heating of a conveyor belt. Correlation data between an electrical resistance value of a passive IC tag embedded in a conveyor belt and a temperature of the IC tag when it is activated is grasped in advance when the tag receives a transmitted radio wave from a non-contact detector. Data of electrical resistance value when the IC tag is activated is received by the detector through a returned radio wave returned from the tag in response to the transmitted radio wave transmitted from the detector toward the tag embedded in the conveyor belt running. A temperature at a position of the conveyor belt where the tag is embedded is calculated in accordance with the data of the electrical resistance value received and the correlation data.
1. A temperature detection device for a conveyor belt, the temperature detection device comprising:
a passive IC tag embedded in a conveyor belt;
a plurality of detectors configured to wirelessly communicate with the IC tag without contacting the conveyor belt, the plurality of the detectors being installed evenly around the entire circumference of the conveyor belt between pulleys at intervals in a longitudinal direction of the conveyor belt; and
a calculation unit connected to the detectors; wherein
a returned radio wave returned from the IC tag in response to a transmitted radio wave transmitted from the detectors toward the IC tag being received by the detectors,
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 being input to the calculation unit,
the transmitted radio wave being transmitted from the detectors toward the IC tag embedded in the conveyor belt mounted between the pulleys and running,
data of the electrical resistance value being received by the detectors through a returned radio wave returned from the IC tag in response to the transmitted radio wave,
a temperature at a position of the conveyor belt where the IC tag is embedded being calculated by the calculation unit in accordance with the data of the electrical resistance value received and the correlation data, and 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 is grasped, and
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.
2. The temperature detection device for a conveyor belt according to claim 1 , wherein a plurality of the IC tags is embedded at intervals in a longitudinal direction of the conveyor belt and is embedded at intervals in a width direction of the conveyor belt.
3. The temperature detection device for a conveyor belt according to claim 1 , wherein the IC tag is embedded in a lower cover rubber of the conveyor belt.
4. The temperature detection device for a conveyor belt according to claim 1 , wherein the IC tag is embedded between a plurality of layers of canvas constituting a core layer of the conveyor belt.
5. 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.
6. The temperature detection device for a conveyor belt according to claim 2 , wherein the IC tag is embedded in a lower cover rubber of the conveyor belt.
7. The temperature detection device for a conveyor belt according to claim 2 , wherein the IC tag is embedded between a plurality of layers of canvas constituting a core layer of the conveyor belt.