Transmitter for tire condition monitoring apparatus and tire condition monitoring apparatus
First Claim
1. A transmitter for a tire condition monitoring apparatus located in the tire of a vehicle, said transmitter comprising:
- a measurement device for measuring the condition of the tire, wherein the measured condition of the tire includes an internal temperature of the tire;
a transmission device for performing wireless communication of data indicating the condition of the tire measured by the measurement device; and
a transmission controller, said transmission controller controls the transmission device in accordance with an operating mode selected from a normal mode, in which data transmission is performed a predetermined number of times in a cycle of a predetermined length of time, and a temperature compensation mode, in which data transmission is performed a number of times greater than said predetermined number of times in the same cycle, and wherein said transmission controller determines whether to shift from the current one of the operating modes to the other operating mode by comparing the measured internal temperature of the tire with a predetermined threshold temperature.
1 Assignment
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Accused Products
Abstract
A transmission controller for a transmitter compares the value of data of the temperature in a tire measured by a temperature sensor with a predetermined threshold temperature, and determines the number of times a transmitting circuit performs the transmitting operation in a cycle of a predetermined length of time. For example, when the temperature in the tire rises, the number of times the transmitting circuit performs the transmitting operation in the predetermined cycle is increased. Therefore, the reduction in the reception probability of a receiver is limited even when the transmission output of the transmitter is reduced due to temperature affect.
27 Citations
18 Claims
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1. A transmitter for a tire condition monitoring apparatus located in the tire of a vehicle, said transmitter comprising:
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a measurement device for measuring the condition of the tire, wherein the measured condition of the tire includes an internal temperature of the tire; a transmission device for performing wireless communication of data indicating the condition of the tire measured by the measurement device; and a transmission controller, said transmission controller controls the transmission device in accordance with an operating mode selected from a normal mode, in which data transmission is performed a predetermined number of times in a cycle of a predetermined length of time, and a temperature compensation mode, in which data transmission is performed a number of times greater than said predetermined number of times in the same cycle, and wherein said transmission controller determines whether to shift from the current one of the operating modes to the other operating mode by comparing the measured internal temperature of the tire with a predetermined threshold temperature. - View Dependent Claims (2, 3, 4)
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5. A transmitter for a tire condition monitoring apparatus located in the tire of a vehicle, said transmitter comprising:
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a measurement device for measuring the condition of the tire, wherein the measured condition of the tire includes an internal temperature of the tire; a transmission device for performing wireless communication of data indicating the condition of the tire measured by the measurement device; and a transmission controller, said transmission controller controls the transmission device in accordance with an operating mode selected from a normal mode in which data transmission is performed at first time intervals and a temperature compensation mode in which data transmission is performed at second time intervals shorter than the first time intervals, and wherein said transmission controller determines whether to shift from the current one of the operating modes to the other operating mode by comparing the measured internal temperature of the tire with a predetermined threshold temperature. - View Dependent Claims (6, 7, 8)
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9. A tire condition monitoring apparatus located in a tire of a vehicle, the tire condition monitoring apparatus comprising:
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a transmitter, the transmitter including; a measurement device for measuring the condition of the tire, wherein the measured condition of the tire includes an internal temperature of the tire; a transmission device performing wireless communication of data indicating the condition of the tire measured by the measurement device; and a transmission controller, said transmission controller controls the transmission device in accordance with an operating mode selected from a normal mode, in which data transmission is performed a predetermined number of times in a cycle of a predetermined length of time, and a temperature compensation mode, in which data transmission is performed a number of times greater than said predetermined number of times in the same cycle, and wherein said transmission controller selects the operating mode by comparing the measured internal temperature of the tire with a predetermined threshold temperature; and a receiver which receives data transmitted from said transmitter and which processes the received data. - View Dependent Claims (10, 11, 12, 13)
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14. A tire condition monitoring apparatus located in a tire of a vehicle, the tire condition monitoring apparatus comprising:
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a transmitter, the transmitter including; a measurement device for measuring the condition of the tire, wherein the measured condition of the tire includes an internal temperature of the tire; a transmission device performing wireless communication of data indicating the condition of the tire measured by the measurement device; and a transmission controller, said transmission controller controls the transmission device in accordance with an operating mode selected from a normal mode in which data transmission is performed at first time intervals and a temperature compensation mode in which data transmission is performed at second time intervals shorter than the first time intervals, and wherein said transmission controller selects the operating mode by comparing the measured internal temperature of the tire with a predetermined threshold temperature; and a receiver which receives data transmitted from said transmitter and which processes the received data. - View Dependent Claims (15, 16, 17, 18)
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Specification