Bridgestone Corporation

Kabushiki Kaisha Bridgestone

Hiromasa Hada

Takao Kokubu

Hiromitsu Ichikawa

Masaharu Oku

Shigeru Yamaguchi

Identification information for identifying a tire, a tire inner pressure and a tire inner temperature are sent to a tire checking device from a first electronic device provided within a tire and measured results are shown on a display. Groove depth data from a depth meter are also received by the tire checking device and shown on the display. The tire checking device stores received management information such as a tire inner pressure, a tire inner temperature, a groove depth and so on in a memory with associating them with each tire. The stored management information is extracted by a control unit if required and shown on the display. Therefore, a tire inner pressure and a tire inner temperature are detected automatically and groove depth data are stored with being associated with each tire, and thereby the tire inner pressure, the tire inner temperature and the groove depth data can be displayed.

Tire checking device, tire checking system and tire checking method

A tire sensor device comprising sensor modulesA toD, each comprising a sensor, a communication module having a communication function and a power regenerating circuit, and an antenna; and a base station comprising an internal communication device for communication with the sensor modulesA toD, an information processing device for processing tire information signals from the sensor modules, an external communication device for communicating with a car control deviceon the car body side and a power source. The sensor modulesA toD and the base stationare arranged in the tire and constitute an intra-tire LAN. Tire information signals transmitted from the sensor modulesA toD are processed by the base stationand transmitted to the car control deviceso that appropriate tire information can be obtained and the size and power consumption of the sensor device can be reduced.

Tire sensor device and tire information transmission method

The present invention includes a sensor malfunction determination unitdetects the pressure value corresponding to a signal outputted by a pressure sensorcapable of measuring the internal pressure of a pneumatic tire. When the detected pressure value is decreasing along the time axis, the sensor malfunction determination unitdetermines that the pressure sensoris not malfunctioning.

Sensor malfunction determination device and sensor malfunction determination method

A tire wear detection system includes a detection unit () which detects acceleration applied to a wear bar () arranged in a groove of a tread section of a pneumatic tire (), and a wear judgment unit () which judges that a tire has been worn based on the acceleration detected by the detection unit ().

Tire wear detection system and pneumatic tire

A pneumatic-tire-use electronic-device fixing system according to the present invention includes: an electronic-device housing apparatus, which houses the electronic device, and which includes an engaging convex portionthat is convex; and an electronic-device housing apparatus support, which is provided on an inner surface of the pneumatic tire, and which includes an engaging concave portion that is concave. First pullout suppression means which suppresses pullout of the engaging convex portion from the engaging concave portion is provided on at least a part of a surface of the engaging convex portion, and second pullout suppression means which engages with the first pullout suppression means is provided on at least a part of a surface of the engaging concave portion. According to the present invention, it becomes possible to provide a pneumatic-tire-use electronic-device fixing system, a pneumatic tire, and an electronic-device housing apparatus, which are capable of securely fixing the pneumatic-tire-use electronic device, and also capable of suppressing breakage of a fixing portion for fixing a pneumatic-tire-use electronic device.

Growing community of inventors

Kokubunji, Japan

Hiromasa Hada