Tire temperature sensor, tire heat deterioration detection sensor and tire
First Claim
1. A tire temperature sensor comprising a magnetic circuit constituting body arranged in the above portion of the tire and forming a magnetic closed circuit, and a magnetic sensor detecting a magnetic field leaked from the magnetic circuit constituting body, in which said magnetic circuit constituting body has a characteristic of increasing a leakage magnetic field as a temperature rises in the vicinity of a predefined temperature.
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Accused Products
Abstract
A change of magnetic characteristics of a magnetic circuit constituting body or a composite magnet arranged in a necessary portion of a tire is detected by a magnetic sensor detecting a magnetic field leaked from the magnetic circuit constituting body or a magnetic filed from the composite magnet, while a temperature in the necessary portion of the tire is directly measured or a degree of heat deterioration is directly measured by using a tire temperature sensor or a tire heat deterioration detection sensor constructed so as of change the magnetic characteristics of the magnetic circuit constituting body or the composite magnet dependent on the temperature or the degree of heat deterioration in the necessary portion of the tire, whereby it is possible to attain an early identification of the abnormality on the possibility bringing about the troubles of the tire. Also, there is provided a tire temperature sensor or a tire heat deterioration detection sensor causing no fear of the early battery drain.
25 Citations
31 Claims
- 1. A tire temperature sensor comprising a magnetic circuit constituting body arranged in the above portion of the tire and forming a magnetic closed circuit, and a magnetic sensor detecting a magnetic field leaked from the magnetic circuit constituting body, in which said magnetic circuit constituting body has a characteristic of increasing a leakage magnetic field as a temperature rises in the vicinity of a predefined temperature.
- 6. A tire temperature sensor comprising a composite magnet arranged in this portion of the tire and having magnetic poles of reverse polarity at both ends thereof and a magnetic sensor detecting a magnetic field formed by the composite magnet, in which said composite magnet has a characteristic of dropping a magnetic force as a temperature rises in the vicinity of a predefined temperature.
- 15. A tire heat deterioration detection sensor for detecting a degree of heat deterioration in an necessary portion of a tire, which is a tire heat deterioration detection sensor comprising a magnetic circuit constituting body arranged in this necessary portion of the tire and forming a magnetic closed circuit and a magnetic sensor detecting a magnetic field leaked from the magnetic circuit constituting body, in which the magnetic circuit constituting body has a characteristic of increasing a leakage magnetic field accompanied with the progress of heat deterioration.
- 20. A tire heat deterioration detection sensor comprising a composite magnet arranged in this portion of the tire and having magnetic poles of reverse polarity at both ends thereof and a magnetic sensor detecting a magnetic field formed by the composite magnet, in which said composite magnet has a characteristic of dropping a magnetic force accompanied with the progress of heat deterioration.
Specification