Integrated fuel dispensing and accounting system
An interface system extends a prior-art multi-pump fuel delivery station so that authorization to activate the fuel delivery pump can be obtained from a remote authorization service over a long-range wireless communication link such as a cellular telephone connection or a satellite connection; and delivered to the interface system over a different, short-range wireless communication link such as a Bluetooth® connection or a WiFi connection. After receiving the authorization, a signal to activate a fuel delivery pump is transmitted to a physically separate pump control module over an electrical power line by being coupled onto the power line by a first power line interface, and coupled back off of the power line by a second power line interface. The signal causes the physically separate pump to start or stop operation.
1. A fuel-dispensing and accounting system operated by cooperation among a plurality of devices, comprising:
a first physical enclosure containing a first computing device coupled to a short-range wireless transceiver and a first power line interface; and
a second, separate physical enclosure containing a second computing device coupled to a second power line interface and an electrical switch, wherein
the first and second power line interfaces are coupled to a common power line;
the first and second computing devices obtain operating power from the common power line;
the first computing device operates under control of first data and instructions to perform operations comprising:
establishing a data connection with a user device over the short-range wireless transceiver;
receiving a vending authorization from the user device; and
transmitting a switch control signal through the first power line interface onto the common power line; and
the second computing device operates under control of second data and instructions to perform operations comprising:
receiving the switch control signal through the second power line interface from the common power line; and
activating the electrical switch in accordance with the switch control signal, and wherein
activating the electrical switch causes electrical power to be communicated from the common power line through the electrical switch to activate a pump.
2. The fuel-dispensing and accounting system of claim 1 , further comprising:
a pump connected to the electrical switch, said pump to operate when the electrical switch is activated.
3. A fuel-dispensing and accounting system operated by cooperation among a plurality of devices, comprising:
a first physical enclosure containing a first computing device coupled to a short-range wireless transceiver and a first power line interface; and
a second, separate physical enclosure containing a second computing device coupled to a second power line interface and a digitally-controlled, electrically operated pump, wherein
the first and second power line interfaces and the pump are coupled to a common power line;
the first and second computing devices and the pump obtain operating power from the common power line;
the first computing device operates under control of first data and instructions to perform operations comprising:
establishing a data connection with a user device over the short-range wireless transceiver;
receiving a vending authorization from the user device; and
transmitting a switch control signal through the first power line interface onto the common power line; and
the second computing device operates under control of second data and instructions to perform operations comprising:
receiving the switch control signal through the second power line interface from the common power line; and
forwarding the switch control signal to the digitally-controlled, electrically-operated pump to activate said pump.
4. The fuel-dispensing and accounting system of claim 3 , further comprising:
a digitally-controlled, electrically-operated pump coupled to the second computing device, said pump to receive the switch control signal and operate in accordance therewith.
5. The fuel-dispensing and accounting system of claim 3 wherein the digitally-controlled, electrically-operated pump is a fuel dispenser that emits a message containing a quantity of fuel dispensed in accordance with the switch control signal, the first data and instructions and second data and instructions causing further operations comprising:
receiving the message at the second computing device; and
forwarding the message from the second computing device to the first computing device by communications between the second power line interface and the first power line interface.