Tire information acquisition device having a heat-insulating material
Provided is a tire information acquisition device. A sensor unit substrate on which a sensor for acquiring tire information and a power supply unit for supplying electric power to the sensor are disposed is provided, and a heat-insulating material is disposed at at least a periphery of the power supply unit.
1. A tire information acquisition device, comprising
a sensor unit substrate on a same plane of which a sensor for acquiring tire information and a power supply unit for supplying electric power to the sensor are disposed;
a heat-insulating material being disposed at at least a periphery of the power supply unit; wherein
the power supply unit comprises an electret that generates electric power by changing a position of an electrode due to a rotational movement or a reciprocating movement.
2. The tire information acquisition device according to claim 1 , wherein the sensor is disposed outside the heat-insulating material.
3. The tire information acquisition device according to claim 2 , wherein a thermal conductivity of the heat-insulating material at 20° C. is 0.05 W/m·K or less.
4. The tire information acquisition device according to claim 3 , wherein the heat-insulating material is a composite body of an organic fiber and an inorganic porous material.
5. The tire information acquisition device according to claim 4 , wherein the heat-insulating material comprises a structure in which silica aerogel is dispersed in polyester fiber.
6. The tire information acquisition device according to claim 1 , wherein a thermal conductivity of the heat-insulating material at 20° C. is 0.05 W/m·K or less.
7. The tire information acquisition device according to claim 1 , wherein the heat-insulating material is a composite body of an organic fiber and an inorganic porous material.
8. The tire information acquisition device according to claim 1 , wherein the heat-insulating material comprises a structure in which silica aerogel is dispersed in polyester fiber.
9. The tire information acquisition device according to claim 1 , wherein the sensor is a pressure sensor, acceleration sensor or magnetic sensor.
10. The tire information acquisition device according to claim 1 , further comprising a housing having two parts which fit together to enclose the sensor, the sensor unit substrate and the power supply unit, the housing being formed from a resin material.