Tire inflation pressure sensing apparatus with command signal receiver having variable receiver sensitivity
First Claim
1. A tire inflation pressure sensing apparatus comprising:
- a transmitter provided on a wheel of a vehicle, said transmitter including a pressure sensor configured to sense an inflation pressure of a tire mounted on the wheel and generate a pressure signal that indicates the sensed inflation pressure of the tire, said transmitter having a first operation mode, in which said transmitter transmits the pressure signal generated by said pressure sensor, and a second operation mode;
a receiver provided on a body of the vehicle, said receiver working to receive the pressure signal transmitted from said transmitter and determine the inflation pressure of the tire based on the pressure signal; and
a command signal receiver operatively connected to said transmitter, said command signal receiver working to sequentially receive a first and a second command signal that respectively indicate a first and a second instruction for said transmitter, said command signal receiver having a variable receiver sensitivity that is set by said transmitter to one of a higher value and a lower value, wherein, in response to receipt of the first command signal by said command signal receiver, said transmitter enters into the second operation mode and sets the receiver sensitivity of said command signal receiver to the higher value according to the first instruction indicated by the first command signal, and after setting of the receiver sensitively of said command signal receiver to the higher value, said command signal receiver receives the second command signal so that said transmitter performs a predetermined task according to the second instruction indicated by said second command signal.
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Accused Products
Abstract
A tire inflation pressure sensing apparatus according to the present invention includes a transmitter, a receiver, and a command signal receiver. The transmitter is provided on a wheel of a vehicle and includes a pressure sensor configured to sense the inflation pressure of a tire on the wheel and generate a pressure signal indicative of the sensed inflation pressure. The receiver is provided on the body of the vehicle and works to receive the pressure signal and determine the inflation pressure of the tire based on the pressure signal. The command signal receiver is operatively connected to the transmitter and works to receive command signals that indicate instructions for the transmitter. The command signal receiver has a variable receiver sensitivity so as to prevent the command signal receiver and transmitter from being activated by noises while ensuring reliable activation of the command signal receiver and transmitter by “true” command signals.
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Citations
20 Claims
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1. A tire inflation pressure sensing apparatus comprising:
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a transmitter provided on a wheel of a vehicle, said transmitter including a pressure sensor configured to sense an inflation pressure of a tire mounted on the wheel and generate a pressure signal that indicates the sensed inflation pressure of the tire, said transmitter having a first operation mode, in which said transmitter transmits the pressure signal generated by said pressure sensor, and a second operation mode;
a receiver provided on a body of the vehicle, said receiver working to receive the pressure signal transmitted from said transmitter and determine the inflation pressure of the tire based on the pressure signal; and
a command signal receiver operatively connected to said transmitter, said command signal receiver working to sequentially receive a first and a second command signal that respectively indicate a first and a second instruction for said transmitter, said command signal receiver having a variable receiver sensitivity that is set by said transmitter to one of a higher value and a lower value, wherein, in response to receipt of the first command signal by said command signal receiver, said transmitter enters into the second operation mode and sets the receiver sensitivity of said command signal receiver to the higher value according to the first instruction indicated by the first command signal, and after setting of the receiver sensitively of said command signal receiver to the higher value, said command signal receiver receives the second command signal so that said transmitter performs a predetermined task according to the second instruction indicated by said second command signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A tire inflation pressure sensing apparatus comprising:
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a transmitter provided on a wheel of a vehicle, said transmitter including a pressure sensor configured to sense an inflation pressure of a tire mounted on the wheel and generate a pressure signal that indicates the sensed inflation pressure of the tire, said transmitter having a first operation mode, in which said transmitter transmits the pressure signal generated by said pressure sensor, and a second operation mode;
a receiver provided on a body of the vehicle, said receiver working to receive the pressure signal transmitted from said transmitter and determine the inflation pressure of the tire based on the pressure signal; and
a command signal receiver operatively connected to said transmitter, said command signal receiver working to receive a command signal that indicates an instruction for said transmitter, said command signal receiver having a variable receiver sensitivity, wherein, the receiver sensitivity of said command signal receiver is set to one of a higher value and a lower value by said transmitter based on the inflation pressure of the tire sensed by said pressure sensor, the command signal is received by said command signal receiver when the receiver sensitivity of said command signal receiver has the higher value, and in response to receipt of the command signal by said command signal receiver, said transmitter enters into the second operation mode to perform a predetermined task according to the instruction indicated by the command signal. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A tire inflation pressure sensing apparatus comprising:
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a transmitter provided on a wheel of a vehicle, said transmitter including a pressure sensor configured to sense an inflation pressure of a tire mounted on the wheel and generate a pressure signal that indicates the sensed inflation pressure of the tire, said transmitter having a first operation mode, in which said transmitter transmits the pressure signal generated by said pressure sensor, and a second operation mode;
a receiver provided on a body of the vehicle, said receiver working to receive the pressure signal transmitted from said transmitter and determine the inflation pressure of the tire based on the pressure signal;
a speed sensor operatively connected to said transmitter, said speed sensor working to sense a speed of the vehicle; and
a command signal receiver operatively connected to said transmitter, said command signal receiver working to receive a command signal that indicates an instruction for said transmitter, said command signal receiver having a variable receiver sensitivity, wherein, the receiver sensitivity of said command signal receiver is set to one of a higher value and a lower value by said transmitter based on the speed of the vehicle sensed by said speed sensor, the command signal is received by said command signal receiver when the receiver sensitivity of said command signal receiver has the higher value, and in response to receipt of the command signal by said command signal receiver, said transmitter enters into the second operation mode to perform a predetermined task according to the instruction indicated by the command signal. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification