Automated manufacturing systems and processes utilizing the 802.11a wireless standard protocol

• US 20070005166A1
• Filed: 06/30/2005
• Published: 01/04/2007
• Est. Priority Date: 06/30/2005
• Status: Abandoned Application

• Current Assignee: GM Global Technology Operations Incorporated (General Motors Company)
• Original Assignee: GM Global Technology Operations Incorporated (General Motors Company)
• Inventors: Bias, Joel, Gajor, Frank, Gu, Fangming, Chen, Yilong, Berger, David
• Application Number:
  US11/171,627
• Publication Number:
  US 20070005166A1
• Time in Patent Office: Days
• US Class Current: 700/96
• CPC Class Codes: G05B 2219/15117 Radio link, wireless
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Abstract

Provided herein are systems useful in a manufacturing environment for transmitting operational commands to one or more workstations at which a workpiece is being acted upon by one or more pieces of manufacturing process equipment. A system according to the invention utilizes the 802.11a communication standard in conveying command signals wirelessly from a source to a programmable logic controller that is adapted to control the actions of a piece of manufacturing process equipment. A system according to the invention is adaptable to multiple-stage manufacturing operations through use of a plurality of receiving stations which are each equipped with a wireless modem in cooperative connection with a programmable logic controller that controls a particular piece of manufacturing process equipment at each stage. Systems and processes according to the invention are applicable to nearly any manufacturing process, and allow increased flexibility in management and configuration of manufacturing operations, while conferring a high degree of portability in many cases.

Claims

1. A system useful for controlling a manufacturing operation, which system comprises:

a) a command-transmitting substation which comprises;

i) a network router, capable of functioning as a switch;

ii) a first programmable logic controller connected to said network router; and

iii) a first wireless network adapter connected to said network router, and

b) a command-receiving substation which comprises;

i) a second wireless network adapter; and

ii) a second programmable logic controller connected to said second wireless network adapter,

wherein said first wireless network adapter transmits electromagnetic signals containing command information to said second wireless network adapter acting as a receiver for said signals, under the 802.11a standard protocol, said router being optionally connected to a computer network.

2. A system according to claim 1 wherein at least one of said programmable logic controllers and wireless network adapter to which it is connected are both embedded in a single electronic device.

3. A system according to claim 1 further comprising at least a second command-receiving substation which comprises:

i) a third wireless network adapter;

ii) a third programmable logic controller connected to said third wireless network adapter,

wherein said third wireless network adapter receives signals from said first wireless network adapter under the 802.11a standard protocol.

4. A system according to claim 3 further comprising at least a third command-receiving substation which comprises:

i) a fourth wireless network adapter;

ii) a fourth programmable logic controller connected to said fourth wireless network adapter,

wherein said fourth wireless network adapter receives signals from said first wireless network adapter under the 802.11a standard protocol.

5. A system according to claim 1 further comprising a computer interface comprising a microprocessor, storage means and a display, wherein said computer interface is connected to said router via means of a cable.

6. A system according to claim 2 further comprising a second command-receiving substation which comprises:

i) a third wireless network adapter;

ii) a third programmable logic controller connected to said third wireless network adapter,

wherein said third wireless network adapter receives signals from said first wireless network adapter under the 802.11a standard protocol.

7. A system according to claim 6 further comprising at least a third command-receiving substation which comprises:

i) a fourth wireless network adapter;

ii) a fourth programmable logic controller connected to said fourth wireless network adapter,

wherein said fourth wireless network adapter receives signals from said first wireless network adapter under the 802.11a standard protocol.

8. A system useful for controlling a manufacturing operation, which system comprises:

a) a command-transmitting substation which comprises;

i) a first programmable logic controller;

ii) a first wireless network adapter connected to said first programmable logic controller;

b) a command-receiving substation which comprises;

i) a second programmable logic controller; and

ii) a second wireless network adapter connected to said second programmable logic controller,

wherein said first wireless network adapter transmits electromagnetic signals containing command information to said second wireless network adapter acting as a receiver for said signals, under the 802.11a standard protocol, and wherein said first programmable logic controller and said first wireless network adapter both are optionally embedded in a single electronic device.

9. A system according to claim 8 wherein said second programmable logic controller and said second wireless network adapter are both embedded in a single electronic device.

10. A process for controlling a manufacturing process that operates on a workpiece, which process comprises:

a) providing a programmable logic controller;

b) providing a piece of equipment useful in a manufacturing process, wherein said piece of manufacturing equipment is in effective electrical contact with said programmable logic controller sufficient that said programmable logic controller is capable of controlling the function of said piece of equipment;

c) providing a first wireless modem in effective electrical contact with said programmable logic controller;

d) providing a second wireless modem which is capable of communicating with said first wireless modem;

e) providing a computer interface in effective communicating electrical contact with said second wireless modem;

f) transmitting a function command from said second wireless modem to said first wireless modem, sufficient to cause an action in said piece of equipment,

wherein said first wireless modem and said second wireless modem communicate using the 802.11a wireless standard.

11. A process according to claim 10 wherein said manufacturing process is a multi-step manufacturing process involving the operation of a plurality of pieces of manufacturing equipment on a workpiece, and wherein step c) further comprises providing a plurality of wireless modems, each in effective electrical contact with a programmable logic controller that is associated with at least one step in said manufacturing process.