Wheel condition monitoring system
First Claim
1. A wheel condition monitoring system having a transmitter which is installed on an individual rotatable wheel to transmit a condition of the wheel and a receiver which is installed on the vehicle body side to receive the condition of the wheel sent from said transmitter, wherein a rotational speed of the wheel is detected, and data indicating the condition of the wheel is sent from said transmitter to said receiver at intervals proportional to the detected rotational speed of the wheel.
2 Assignments
0 Petitions
Accused Products
Abstract
A wheel condition-monitoring system comprises transmitters (1) installed on individual rotatable wheels, for transmitting conditions of the wheels, and a receiver (11) installed on the side of a vehicle body, for receiving the conditions of the wheels sent from the transmitters. The rotation speed of the wheels are detected, and data that indicate the conditions of the wheels are sent from the transmitters (1) to the receiver (11) at intervals in accordance with the rotation speeds detected, or data that relate to a pressure etc. are sent for a predetermined number of times at a transmission interval of a first cycle that assumes a high speed range. At the same time, data transmission of a predetermined number of times corresponding to the transmission interval of the first cycle is repeated for a predetermined number of times at a transmission interval of a second cycle that assumes a low speed range and is longer than the first cycle. This increases reliability in data transmission and reception, and enables the system to function stably in the presence of a dead point.
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Citations
16 Claims
- 1. A wheel condition monitoring system having a transmitter which is installed on an individual rotatable wheel to transmit a condition of the wheel and a receiver which is installed on the vehicle body side to receive the condition of the wheel sent from said transmitter, wherein a rotational speed of the wheel is detected, and data indicating the condition of the wheel is sent from said transmitter to said receiver at intervals proportional to the detected rotational speed of the wheel.
- 10. A wheel condition monitoring system having a transmitter which is installed on an individual rotatable wheel to transmit a condition of the wheel and a receiver which is installed on the vehicle body side to receive the condition of the wheel sent from said transmitter, wherein data that indicate the condition of wheel are sent a predetermined number of times at a transmission interval of a first cycle that assumes a high speed range, and also data transmission of a predetermined number of times at the transmission interval of the first cycle is repeated a predetermined number of times at a transmission interval of a second cycle that assumes a low speed range and is longer than the first cycle.
Specification