Network for confined hazardous or other extreme environments

• US 8,005,100 B2
• Filed: 01/04/2007
• Issued: 08/23/2011
• Est. Priority Date: 09/21/2006
• Status: Expired due to Fees

• Current Assignee: Active Control Technology, Inc.
• Original Assignee: Active Control Technology, Inc.
• Inventors: Barrett, Steve, Stein, Andy
• Primary Examiner(s): Chang; Kent
• Assistant Examiner(s): Eisner; Ronald
• Application Number:
  US11/649,419
• Publication Number:
  US 20080076383A1
• Time in Patent Office: 1,692 Days
• Field of Search: 455/447, 370/338, 370/310, 370/351, 370/400, 370/406
• US Class Current: 370/406
• CPC Class Codes: E21F 17/18 Special adaptations of signalling or alarm devices for mine lifts B66B; gas-sensitive devices per se G01N
• CPC Class Codes: H04W 16/20 for indoor coverage or short range network deployment

Abstract

A network for a mine or other hazardous environment is provided. The network can include a plurality of access points that can communicate with each other. The access points can be deployed along a plurality of pillars in a room-and-pillar mine. The access points can interconnect a mobile wireless client device within the mine with an operations centre. In the event of an explosion or other disaster, a UPS battery back-up and the redundancy of the access points can increase the likelihood that a link between the wireless client device and the operations center can be maintained.

Claims

1. A network for an underground mine, said mine comprising rooms having pillars that define a forward extent and a lateral extent of each room, said network comprising:

a server;

a plurality of wireless nodes deployed on said pillars, each of said wireless nodes having at least one directional antenna, said at least one directional antenna configured to generate a coverage footprint directed along at least a portion of said forward extent and additionally directed along at least a portion of said lateral extent;

at least one of said nodes in communication with said server;

each of said nodes configured so that each node is in communication with at least one other of said nodes so that all of said nodes can communicate with said server; and

,

at least one client configured to execute an application and to communicate with each of said nodes such that said server can communicate with said client.

2. The network of claim 1 wherein said nodes communicate with said server via a first channel and communicate with said client via a second channel.

3. The network of claim 1 wherein said nodes communicate with said client via the 802.11 protocol.

4. The network of claim 1 wherein said application is voice over IP telephony and said server is connected to a voice over IP telephone such that a user at said server can communicate with a miner carrying said client.

5. The network of claim 4 wherein said server is also connected to the public switched telephone network such that said miner can communicate with telephony devices on said public switched telephone network.

6. The network of claim 1 wherein said network is configured to self-heal such that if an explosion results in a loss of one or more of said nodes remaining of said nodes reestablish communication with adjacent nodes to reestablish communication between said remaining of said nodes and said server.

7. The network of claim 1 wherein if an explosion results in a loss of one or more of said nodes such that not all of said nodes are in communication with said server, then one or more portable nodes configured to automatically communicate with the remainder of said nodes can be carried into said mine by a search and rescue team and positioned at a location that will allow said one or more portable nodes to reestablish communications between remaining of said nodes and said server.

8. The network of claim 1 wherein said client is carried by a miner and said application is location determination based on triangulation between two or more of said nodes such that an application at said server can, in real time, show a representation of a location of said miner.

9. The network of claim 1 wherein said application is two way video.

10. The network of claim 1 wherein said application is inventory tracking and said client is an RFID tag that is attached to a piece of mining equipment, or safety room or self-rescue/breathing equipment such that said client can be located in said mine.