Tire condition monitoring apparatus
First Claim
1. A tire condition monitoring apparatus for monitoring a condition of a tire attached to a vehicle, the apparatus comprising:
- a transmitter, which is operated by a battery and detects at least a temperature in the tire and a voltage-related value that varies in accordance with a voltage of the battery, wherein the battery has a life; and
a controller, which judges whether or not the life of the battery is ending depending on the voltage-related value, wherein the judgment regarding the life of the battery is performed in accordance with a comparison of the voltage-related value that varies in accordance with the voltage of the battery with a voltage-related reference value that is based at least in part on the temperature in the tire.
1 Assignment
0 Petitions
Accused Products
Abstract
A transmitter, which is operated by a battery, wirelessly transmits data including data that represents the temperature T in a tire and data that represents the voltage V of the battery. A receiver judges whether or not the life of the battery is ending depending on the battery voltage V read from the received data. More specifically, the receiver performs the judgment regarding the life of the battery based on a comparison between the battery voltage V and a variable voltage reference value V0, which is selected in accordance with the temperature T in the tire. The judgment regarding the life of the battery is thus accurately performed.
-
Citations
15 Claims
-
1. A tire condition monitoring apparatus for monitoring a condition of a tire attached to a vehicle, the apparatus comprising:
-
a transmitter, which is operated by a battery and detects at least a temperature in the tire and a voltage-related value that varies in accordance with a voltage of the battery, wherein the battery has a life; and a controller, which judges whether or not the life of the battery is ending depending on the voltage-related value, wherein the judgment regarding the life of the battery is performed in accordance with a comparison of the voltage-related value that varies in accordance with the voltage of the battery with a voltage-related reference value that is based at least in part on the temperature in the tire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A tire condition monitoring apparatus for monitoring a condition of a tire attached to a vehicle, the apparatus comprising:
-
a transmitter, which is operated by a battery and wirelessly transmits data, wherein the data includes at least data that represents a temperature in the tire and data that represents a voltage of the battery, wherein the battery has a life; and a receiver, which receives the data from the transmitter, wherein the receiver includes a controller that judges whether or not the life of the battery is ending depending on the voltage of the battery, which is derived from the received data, wherein the judgment regarding the life of the battery is performed in accordance with a comparison of the voltage of the battery with a voltage-related reference value that is based at least in part on the temperature in the tire, which is derived from the received data. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. A tire condition monitoring apparatus for monitoring a condition of a tire attached to a vehicle, the apparatus comprising:
-
a transmitter, which is operated by a battery, the battery having a life, wherein the transmitter includes; a temperature sensor, which detects a temperature in the tire; a voltage sensor, which detects a voltage of the battery; and a transmitting circuit, which wirelessly transmits data including data that represents the detected temperature and data that represents the detected voltage; and a receiver, which receives the data from the transmitter, wherein the receiver includes a controller that judges whether or not the life of the battery is ending based on a comparison between the voltage of the battery, which is derived from the received data, and a variable voltage reference value that is selected in accordance with the temperature in the tire, which is derived from the received data.
-
Specification