Wireless tank monitoring system having satellite communications capability

• US 8,223,027 B2
• Filed: 11/24/2004
• Issued: 07/17/2012
• Est. Priority Date: 11/24/2004
• Status: Active Grant

• Current Assignee: Invensys Systems Incorporated (Invensys PLC)
• Original Assignee: Robertshaw Controls Company (Schneider Electric SE)
• Inventors: Jenkins, Patrick A., Kronau, Paul D., Miller, Wojtek
• Primary Examiner(s): POPE, DARYL C
• Application Number:
  US10/996,804
• Publication Number:
  US 20060111040A1
• Time in Patent Office: 2,792 Days
• Field of Search: 340/612, 340/506, 340/511, 340/539.1, 340/539.24, 340/603, 340/613, 340/618, 700/9, 702/188
• US Class Current: 340/612
• CPC Class Codes: H04B 7/18513 Transmission in a satellite or space-based system

Abstract

A wireless tank monitoring system for remotely monitoring a plurality of storage tanks is provided. This tank monitoring system utilizes wireless communication from individual tank level monitors to a single SatComm Gateway. The SatComm Gateway then utilizes a low-Earth Orbit satellite constellation to transmit information to a central data collection center. The data collection center then provides access to this information to clients. These clients also have the capability of controlling individual monitors via the bi-directional communications path through the satellite link to the SatComm Gateway to the individual monitors. The SatComm Gateway packages the information from each of the monitors to optimize the communications through the satellite link to decrease the cost of transmission. Intrinsic safety is provided by each of the individual tank level monitors.

Claims

1. A tank level monitoring system for communicating remote tank level information via a satellite communications link to a client, comprising:

a plurality of tank level monitors having wireless communications capability;

a satellite communications gateway in wireless communication with the plurality of tank level monitors, the satellite communications gateway configured to wirelessly receive tank level information from each of the tank level monitors, programmed to package the tank level information from all of the tank level monitors into a single transmission package, and configured to transmit the single transmission package to the satellite communications link for delivery to the client.

2. The tank level monitoring system of claim 1, wherein each of the plurality of tank level monitors includes a direct sequence spread spectrum (DSSS) radio to provide wireless communication with the satellite communications gateway.

3. The tank level monitoring system of claim 2, wherein each of the plurality of tank level monitors includes a DSSS receiver and a DSSS transmitter to enable two way communications with the satellite communication gateway.

4. The tank level monitoring system of claim 3, wherein the satellite communications gateway wirelessly transmits a monitoring interval to each of the plurality of tank level monitors.

5. The tank level monitoring system of claim 1, wherein the plurality of tank level monitors utilize a UL 50, Type 3 enclosure to facilitate intrinsic safety per UL 913 for use in Class I, Division 1, Group D Hazardous Locations.

6. The tank level monitoring system of claim 1, wherein the plurality of tank level monitors are battery powered.

7. The tank level monitoring system of claim 1, wherein the satellite communications gateway is configured to wirelessly transmit commands to the plurality of tank level monitors.

8. The tank level monitoring system of claim 7, wherein the satellite communications gateway is configured to wirelessly transmit commands to individual ones of the plurality of tank level monitors.

9. The tank level monitoring system of claim 1, wherein the satellite communications gateway is configured to receive commands from the client via the satellite communications link.

10. The tank level monitoring system of claim 1, further comprising a data collection center in electronic communication with the satellite communications link, the data collection center receiving and processing tank level information monitored by the plurality of tank level monitors.

11. The tank level monitoring system of claim 10, wherein the electronic communication is via at least one of a dedicated access line, dial up access, a public switched data network, and email.

12. The tank level monitoring system of claim 10, wherein the data collection center provides electronic access to the received and processed tank level information to the client.

13. The tank level monitoring system of claim 1, wherein the satellite communications link comprises:

a constellation of low earth orbit (LEO) satellites;

a plurality of gateway earth stations (GESs) in communication with the LEO satellites;

a gateway control center (GCC) in communication with the plurality of GESs.

14. The tank level monitoring system of claim 2, wherein the DSSS radio of each of the plurality of tank level monitors has a range of at least 500 feet obstructed.

15. A tank level monitoring system, comprising:

at least one tank level monitor having wireless communications capability;

a satellite communications gateway in wireless communication with the at least one tank level monitor;

a constellation of low earth orbit (LEO) satellites;

a plurality of gateway earth stations (GESs) in communication with the LEO satellites;

a gateway control center (GCC) in communication with the plurality of GESs;

a data collection center in communication with the GCC; and

wherein the satellite communications gateway is configured to wirelessly receive tank level information from the at least one tank level monitor, programmed to package the tank level information from the at least one tank level monitor into a single transmission package, and configured to transmit the single transmission package to the satellite communications link for delivery to the data collection center.

16. The tank level monitoring system of claim 15, wherein the at least one tank level monitor includes a direct sequence spread spectrum (DSSS) radio to provide wireless communication with the satellite communications gateway.

17. The tank level monitoring system of claim 16, wherein the at least one tank level monitor includes a DSSS receiver and a DSSS transmitter to enable two way communications with the satellite communication gateway.

18. The tank level monitoring system of claim 17, wherein the satellite communications gateway wirelessly transmits a monitoring interval to the at least one tank level monitor.

19. The tank level monitoring system of claim 15, wherein the at least one tank level monitor utilizes a UL 50, Type 3 enclosure to facilitate intrinsic safety per UL 913 for use in Class I, Division 1, Group D Hazardous Locations.

20. The tank level monitoring system of claim 15, wherein the at least one tank level monitor is battery powered.

21. The tank level monitoring system of claim 15, wherein the satellite communications gateway is configured to wirelessly transmit commands to the at least one tank level monitor.

22. The tank level monitoring system of claim 15, wherein the satellite communications gateway is configured to receive commands from the client via the LEO satellites.

23. The tank level monitoring system of claim 15, wherein the data collection center communications with the GCC via at least one of a dedicated access line, dial up access, a public switched data network, and email.

24. A method of providing tank level information to a client, comprising the steps of:

monitoring a tank level by a wireless tank level monitor;

wirelessly transmitting information regarding the tank level to a satellite communication gateway;

packaging the information for transmission to a low earth orbit (LEO) satellite within the satellite communication gateway into a single package;

transmitting by the satellite communication gateway the single package of information packaged for transmission to the LEO satellite;

receiving the single package of information at a data collection center from a ground control center (GCC) that receives the single package of information from gateway earth stations (GES) in communication with the LEO satellite;

processing the information; and

providing the client access to the information via the data collection center.

25. The method of claim 24, wherein the step of wirelessly transmitting information comprises the step of transmitting the information via direct sequence spread spectrum (DSSS) transmissions.

26. The method of claim 24, further comprising the step of wirelessly receiving by the satellite communication gateway information from a plurality of wireless tank level monitors, and wherein the step of packaging the information for transmission to a low earth orbit (LEO) satellite within the satellite communication gateway comprises the step of packaging the information from all of the wireless tank level monitors into a single transmission package.

27. A method of controlling remote tank level monitors, comprising the steps of:

electronically communicating a command to a ground control center for transmission via a low earth orbit (LEO) satellite;

receiving the command at a satellite communication gateway from the LEO satellite;

wirelessly transmitting the command from the satellite communication gateway to the tank level monitors; and

wherein the step of wirelessly transmitting the command comprises the step of transmitting the command via direct sequence spread spectrum (DSSS) transmissions.