Apparatus and method for changing frequency deviation
First Claim
Patent Images
1. A method for transmitting tire pressure monitoring system (TPMS) data using frequency-shift keying (FSK) the method comprising:
- at a first time and at a first tire pressure monitoring system (TPMS) sensor, determining a first protocol to be used to transmit tire pressure monitoring data from a transmitter comprising the first TPMS sensor;
selecting a first deviation between a first frequency used to transmit a logic one and a different second frequency used to transmit a logic zero, the first deviation being selected responsive to the first protocol determined;
wherein the first deviation is selected at least in part by comparing a first deviation threshold with a first high frequency deviation associated with the first protocol;
transmitting the TPMS data from the first TPMS sensor using the first frequency to represent a logic one and using the second frequency to transmit a logic zero;
at a second time that occurs after the first time and at the first TPMS sensor, determining a second protocol to be used to transmit tire pressure monitoring data from the same transmitter of the first TPMS sensor;
selecting a second deviation between a third frequency used to transmit a logic one and a fourth frequency used to transmit a logic zero;
wherein the second deviation is selected at least in part by comparing a second deviation threshold with a second high frequency deviation associated with the second protocol;
wherein the first deviation is different than the second deviation;
transmitting the TPMS data from the first TPMS sensor using the third frequency to represent a logic one and using the fourth frequency to represent a logic zero;
wherein the first protocol is changed to the second protocol during the operation of the first TPMS sensor;
wherein the first protocol and the second protocol comprise one or more of a data format and baud rate;
wherein the first protocol and the second protocol are determined at least in part by a controller.
1 Assignment
0 Petitions
Accused Products
Abstract
A protocol to be used in the transmission is determined. Based upon the protocol, the transmission frequency range of a clock is selectively altered. TPMS data is transmitted according to the altered transmission frequency range of the clock.
10 Citations
12 Claims
-
1. A method for transmitting tire pressure monitoring system (TPMS) data using frequency-shift keying (FSK) the method comprising:
-
at a first time and at a first tire pressure monitoring system (TPMS) sensor, determining a first protocol to be used to transmit tire pressure monitoring data from a transmitter comprising the first TPMS sensor; selecting a first deviation between a first frequency used to transmit a logic one and a different second frequency used to transmit a logic zero, the first deviation being selected responsive to the first protocol determined; wherein the first deviation is selected at least in part by comparing a first deviation threshold with a first high frequency deviation associated with the first protocol; transmitting the TPMS data from the first TPMS sensor using the first frequency to represent a logic one and using the second frequency to transmit a logic zero; at a second time that occurs after the first time and at the first TPMS sensor, determining a second protocol to be used to transmit tire pressure monitoring data from the same transmitter of the first TPMS sensor; selecting a second deviation between a third frequency used to transmit a logic one and a fourth frequency used to transmit a logic zero; wherein the second deviation is selected at least in part by comparing a second deviation threshold with a second high frequency deviation associated with the second protocol; wherein the first deviation is different than the second deviation; transmitting the TPMS data from the first TPMS sensor using the third frequency to represent a logic one and using the fourth frequency to represent a logic zero; wherein the first protocol is changed to the second protocol during the operation of the first TPMS sensor; wherein the first protocol and the second protocol comprise one or more of a data format and baud rate; wherein the first protocol and the second protocol are determined at least in part by a controller. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An apparatus for transmitting tire pressure monitoring system (TPMS) data using frequency-shift keying (FSK), the apparatus comprising,
an interface having an input and an output; -
a controller coupled to the interface, the controller configured to; select, a first protocol to be used to transmit tire pressure monitoring data from a transmitter, which is located in a tire pressure monitor, the selected first protocol, having a first deviation, the first deviation being between a first frequency, which is used to transmit a logic one and a second and different frequency, which is used to transmit a logic zero, wherein the first deviation is selected at least in part by comparing a first deviation threshold with a first high frequency deviation associated with the first protocol; the controller being additionally configured to select a second protocol to be used to transmit tire pressure monitoring data from the same transmitter, and using the selected second protocol, select a second deviation between a third frequency that is used to transmit a logic one and a fourth frequency that is used to transmit a logic zero; wherein the second deviation is selected at least in part by comparing a second deviation threshold with a second high frequency deviation associated with the second protocol, wherein the first deviation is different than the second deviation; wherein the first protocol is switched to the second protocol during the operation of the tire pressure monitoring sensor; wherein the first protocol and the second protocol comprise one or more of a data format and baud rate. - View Dependent Claims (8, 9, 10, 11, 12)
-
Specification