Method for data communication between a vehicle and a remote terminal
View Patent ↗An apparatus and methods are provided for data communications associated with a vehicle. The apparatus preferably includes at least one electronic subsystem associated with the vehicle and a plurality of electrical conductors connected to the at least one electronic subsystem and associated with the vehicle. A vehicle data communications protocol converter is preferably connected to the plurality of electrical conductors for converting a first data communications protocol associated with data communications along the plurality of electrical conductors to a second data communications protocol such as a local-area infrared or an RF data communications protocol. The apparatus also preferably includes a transceiver connected to the data communications protocol converter for transmitting the second data communications protocol from the vehicle and receiving the data communications protocol from a remote data communications terminal or another portion of the vehicle.
1. A system for data communication associated with a vehicle comprising a tractor and at least one wheeled apparatus pulled by the tractor, said system comprising:
a first data communications apparatus associated with the tractor;
a second data communications apparatus associated with the at least one wheeled apparatus;
at least one electrical conductor operatively interconnecting said first and second data communications apparatuses, said at least one electrical conductor comprising a data bus for transmitting data between said first and second data communications apparatuses;
a data communications protocol used for transmitting data along said data bus, the data comprising a plurality of data bits which transition between logic values indicating whether said data bus is in an active or an idle state; and
a processor for interrogating data transmitted along said data bus one bit at a time to sense a transition in logic values and a change in said data bus from the active to the idle state, whereby data may be transmitted along said data bus with minimal delay.
2. A system according to claim 1 , further comprising a connector connected to said at least one electrical conductor, a transceiver housing operatively connected to said connector, and a transceiver positioned within said transceiver housing.
3. A system according to claim 2 , wherein said connector includes a plurality of pins having a predetermined pin configuration and first and second connector portions, wherein said connector has one of either a generally cylindrical or a generally rectangular shape, and wherein the second connector portion defines said transceiver housing.
4. A system according to claim 2 , further comprising at least one electronic subsystem associated with the vehicle and related to operation of the vehicle.
5. A system according to claim 4 , wherein said at least one electronic subsystem comprises an anti-locking brake system connected to the vehicle, and wherein said connector is operatively connected to said anti-locking brake system.
6. A system according to claim 2 , wherein said transceiver includes a signal processing physical layer, and wherein said data communications protocol uses only the physical layer of said transceiver for signal processing.
7. A system according to claim 1 , wherein said data communications protocol comprises one of the data communications protocols specified by SAE J1708, SAE J1939, and a universal serial bus standard.
8. A system according to claim 1 , wherein one of said first and second data communications apparatuses comprises a remote data communications terminal.