Remote change of state for laboratory equipment

• US 20020103550A1
• Filed: 01/30/2001
• Published: 08/01/2002
• Est. Priority Date: 01/30/2001
• Status: Active Grant

• Current Assignee: IND, LLC
• Original Assignee: Lynntech Industries, Inc. (TesSol, Inc.)
• Inventors: Andrews, Craig C.
• Granted Patent: US 6,792,320 B2
• Time in Patent Office: Days
• US Class Current: 700/65
• CPC Class Codes: G05B 23/0291 Switching into safety or degraded mode, e.g. protection and supervision after failure
• CPC Class Codes: G05B 9/02 electric

Abstract

A method and apparatus for remotely controlling a laboratory process operated by a controller. The remote control signal may originate from any one or more sensor that detects information that is relevant to the operation and control of a given laboratory process. Examples of sensors that could originate remote control signals include, but are not limited to, building smoke alarms, toxic gas monitors, and handheld remotes carried by laboratory technicians. A receiver communicates the change of state commands to the laboratory process, preferably to a programmable controller operating the laboratory process, directly to the laboratory process, or a combination thereof.

Claims

1. A method for remotely controlling a fuel cell that is operated by a controller, comprising:

transmitting a safe state command from a device that is not part of the fuel cell, wherein the safe state command is selected from a controller safe state command, a hardware safe state command, or a combination thereof;

receiving the safe state command at a receiver in electronic communication with the controller and the laboratory process;

communicating controller safe state commands from the receiver to the controller instructing the controller to execute one or more steps to improve the safe state of the laboratory process; and

communicating hardware safe state commands from the receiver directly to the laboratory process.

2. The method of claim 1, wherein the safe state command is a standby command or a shutdown command.

3. The method of claim 1, wherein the controller operating the fuel cell is part of a fuel cell test station.

4. The method of claim 1, wherein the one or more steps executed by the controller to improve the safe state of the fuel cell are selected from removing a load from the fuel cell, reducing or shutting off the flow of fuel to the fuel cell, reducing or shutting off the flow of oxidant to the fuel cell, purging reactant gases from the fuel cell, increasing the rate of cooling the fuel cell, and relieving backpressure on the fuel cell.

5. The method of claim 1, wherein the controller is selected from a microprocessor, sequencing relays, state machines, programmable logic controller, distributed control system, and combinations thereof.

6. The method of claim 3, wherein the hardware safe state commands are communicated directly to critical components of the fuel cell test station.

7. The method of claim 1, further comprising:

executing, using the controller, another step in response to each controller safe state command received by the controller.

8. The method of claim 1, wherein the safe state commands are selected from shutdown commands, standby commands, reset commands, and combinations thereof.

9. The method of claim 3, wherein the hardware safe state commands are communicated to the fuel cell test station through a holding coil.

10. The method of claim 9, further comprising:

releasing the holding coil upon receiving a hardware safe state command.

11. A system for remotely controlling operation of a fuel cell test station, comprising:

a handheld remote transmitter capable of transmitting one or more change of state commands to the fuel cell test station, wherein the fuel cell test station has a controller and a plurality of process control devices;

a receiver in electronic communication with the controller and in electronic communication with the process control devices;

wherein the receiver directs the one or more change of state commands to the controller to execute a next step in a sequence of steps controlling the process control devices.

12. The system of claim 11, wherein the one or more change of state commands are selected from hardware change of state commands and controller change of state commands.

13. The system of claim 12, wherein the receiver relays hardware change of state commands directly to the process control devices and relays controller change of state commands to the controller.

14. The system of claim 13, further comprising:

a holding coil in electromagnetic communication with one or more control element that is a part of the laboratory equipment.

16. The method of claim 15, wherein the controller is selected from a microprocessor, sequencing relays, state machines, programmable logic controller, distributed control system, and combinations thereof.

17. The method of claim 15, wherein the hardware change of state commands are communicated directly to critical components of the laboratory equipment.

18. The method of claim 15, further comprising:

executing, using the controller, another step in response to each controller change of state command received by the controller.

19. The method of claim 15, wherein the change of state commands are selected from shutdown commands, standby commands, reset commands, and combinations thereof.

20. The method of claim 15, wherein the hardware change of state commands are communicated to the laboratory equipment through a holding coil.

21. The method of claim 20, further comprising:

releasing the holding coil upon receiving a hardware change of state command.

15. A method for remotely controlling a laboratory process operated by a controller, comprising:

transmitting one or more change of state commands from a sensor that is not part of-the laboratory process, wherein the one or more change of state commands are selected from controller change of state commands, hardware change of state commands, or a combination thereof;

receiving the one or more change of state commands at a receiver in electronic communication with the controller and the laboratory process;

communicating controller change of state commands from the receiver to the controller instructing the controller to execute one or more steps to change the state of the laboratory process; and

communicating hardware change of state commands from the receiver directly to the laboratory process.

22. A system for remotely controlling laboratory equipment operated by a controller, comprising:

a handheld remote transmitter capable of transmitting one or more change of state commands;

a receiver in electronic communication with the controller and in electronic communication with the laboratory equipment;

wherein the receiver directs the one or more change of state commands to the controller to execute a next step in a sequence of steps controlling the laboratory equipment.

23. The system of claim 22, wherein the one or more change of state commands are selected from hardware change of state commands and controller change of state commands.

24. The system of claim 23, wherein the receiver relays hardware change of state commands directly to the laboratory equipment and relays controller change of state commands to the controller.

25. The system of claim 24, further comprising:

a holding coil in electromagnetic communication with one or more control element that is a part of the laboratory equipment.

26. The system of claim 25, wherein the one or more control element is selected from valves, switches, and combinations thereof.

27. The system of claim 25, wherein the one or more control element comprises a solenoid valve, and wherein a hardware change of state command relayed to the holding coil releases the holding coil and closes the valve.