Low power regulator system and method

• US 7,064,671 B2
• Filed: 02/28/2001
• Issued: 06/20/2006
• Est. Priority Date: 06/23/2000
• Status: Expired due to Term

• Current Assignee: Trustees Of Columbia University In The City Of New York (Columbia University), Fisher Controls International LLC (Emerson Electric Company)
• Original Assignee: Fisher Controls International LLC (Emerson Electric Company)
• Inventors: Vanderah, Richard J., Woolums, David E., Adams, Paul R., Milliken, Jon B.
• Primary Examiner(s): Lieu, Julie Bichngoc
• Application Number:
  US09/796,902
• Publication Number:
  US 20010054967A1
• Time in Patent Office: 1,938 Days
• Field of Search: 340/636.1, 340/309.16, 340/309.8, 340/309.9, 340/635, 713/300, 713/310, 713/323, 713/324, 713/320
• US Class Current: 340/636.1
• CPC Class Codes: G01F 1/363 with electrical or electro-mechanical indication G01F1/37 and G01F1/38 take precedence
• CPC Class Codes: G01F 1/40 Details of construction of the flow constriction devices
• CPC Class Codes: G01F 1/42 Orifices or nozzles
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence
• CPC Class Codes: G05B 2219/24138 Battery backup
• CPC Class Codes: G05B 2219/25036 Two clocks, high frequency for normal and low frequency for battery low, sleep
• CPC Class Codes: G05B 2219/25289 Energy saving, brown out, standby, sleep, powerdown modus for microcomputer
• CPC Class Codes: G05D 16/2053 the plurality of throttling means comprising only a first throttling means acting on a higher pressure and a second throttling means acting on a lower pressure, e.g. the atmosphere
• CPC Class Codes: G05D 16/2095 using membranes within the main valve

Abstract

Methods are disclosed for collecting sensor data in a pressure regulator system including a controller and a plurality of sensors. The controller and each of the individual sensors are activated as required to collect sensor data during a sampling period thereby reducing the amount of power consumed by the pressure regulator system. Further power conservation measures are implemented by using a battery sensor to monitor the capacity of the pressure regulator battery and placing the pressure regulator in reduced power consumption operating modes as the capacity of the battery is reduced.

Claims

1. A method for collecting sensor data in a pressure regulator system including a controller and a plurality of sensors where the controller is configured to collect sensor data, the method comprising the steps of:

placing the controller in a first mode;

issuing a first controller command to activate a selected sensor of the plurality of sensors;

placing the controller in a second mode for a first predetermined period of time where the controller consumes a reduced amount of power in the second mode than when operating in the first mode;

placing the controller in the first mode after the first predetermined period has lapsed; and

issuing a second controller command to collect sensor data from the selected sensor.

2. The method of claim 1, wherein the controller includes a central processing unit and the step of placing the controller in the second mode includes the step of reducing the operating frequency of the central processing unit.

3. The method of claim 1, further including the steps of:

prior to the step of placing the controller in the second mode, setting an internal clock to generate a first output signal after the first predetermined period of time has lapsed; and

performing the step of placing the controller in the first mode after the first predetermined period has lapsed in response to the first output signal.

4. The method of claim 1, wherein the first predetermined period of time approximately equals the amount of time necessary for the selected sensor to warm up sufficiently to provide accurate sensor data.

5. The method of claim 1, further including the step of placing the controller in the first mode in response to a request for external communication if the controller is in the second mode.

6. The method of claim 1, further including the step of placing the controller in a third mode where the controller consumes a reduced amount of power in the third mode than when operating in the second mode after the sensor data has been collected from the selected sensor.

7. The method of claim 6, wherein the controller further comprises a central processing unit and the step of placing the controller in the third mode includes the step of removing the power supplied to the central processing unit.

8. The method of claim 6, wherein the controller further comprises an internal clock and the step of placing the controller in the third mode includes the step of removing the power supplied to the internal clock.

9. The method of claim 6, wherein the controller further comprises a random access memory and the step of placing the controller in the third mode includes the step of removing the power supplied to the random access memory.

10. The method of claim 6, further including the steps of:

prior to the step of placing the controller in the third mode, setting an external clock to generate a second output signal after a second predetermined period of time has lapsed; and

performing the step of placing the controller in the first mode after the second predetermined period has lapsed in response to the second output signal.

11. The method of claim 6, further including the step of placing the controller in a first mode in response to a request for external communication if the controller is in the third mode.

12. The method of claim 1, wherein the step issuing the first controller command to activate the selected sensor includes the step of issuing a controller command to supply power to the selected sensor.

13. The method of claim 1, further including the step of issuing a third controller command to deactivate the selected sensor after the sensor data has been collected from the selected sensor.

14. The method of claim 13, wherein the step of issuing the third controller command to deactivate the selected sensor includes the step of issuing a controller command to reduce the amount of power supplied to the selected sensor.

15. The method of claim 13, wherein the step of issuing the third controller command to deactivate the selected sensor includes the step of issuing a controller command to remove the power supplied to the selected sensor.

16. A method for collecting sensor data in a pressure regulator system including a controller and a plurality of sensors, where the controller is configured to collect sensor data from each of the plurality of sensors during a sampling period, and wherein the controller is adapted to be placed in an operational made or in a sleep mode where the controller consumes a reduced amount of power when operating in the sleep mode than when operating in the operational mode, the method comprising the steps of:

activating a first selected sensor of the plurality of sensors;

placing the controller in the sleep mode for a first predetermined period of time where the first predetermined period of time approximately equals the amount of time necessary for the first selected sensor to warm up sufficiently to provide accurate sensor data;

collecting sensor data from the first selected sensor;

deactivating the first selected sensor;

activating a second selected sensor of the plurality of sensors;

placing the controller in the sleet mode for a second predetermined period of time with a second predetermined period of time approximately equals the amount of time necessary for the second selected sensor to warm up sufficiently to provide accurate sensor data;

collecting sensor data from the second selected sensor; and

deactivating the second selected sensor.

17. The method of claim 16, wherein the step of activating the first selected sensor includes the step of supplying power to the first selected sensor and the step of deactivating the first selected sensor includes the step of removing power from the first selected sensor.

18. The method of claim 16, wherein the first selected sensor is adapted to be placed in a sleep mode or in an operational mode where the first selected sensor consumes a reduced amount of power in the sleep mode and the step of activating the first selected sensor includes the step of placing the first selected sensor in the operational mode and the step of deactivating the first selected sensor includes the step of placing the first selected sensor in the sleep mode.

19. The method of claim 18, further including the steps of:

initializing the first selected sensor; and

placing the first selected sensor in the sleep mode.

20. The method of claim 16 wherein the controller is adapted to be placed in an operational mode and in a deep sleep mode where the controller consumes a reduced amount of power when operating in the deep sleep mode than when operating in the operational mode and the method further includes the step of after deactivating the second selected sensor, placing the controller in the deep sleep mode for a third predetermined period of time where the third predetermined period of time approximately equals the amount of time between two consecutive sampling periods.

21. The method of claim 16, wherein the first selected sensor comprises a pressure sensor.

22. The method of claim 16, wherein the first selected sensor comprises a travel sensor.

23. The method of claim 16, wherein the first selected sensor comprises a voltage detector.

24. The method of claim 16, wherein the first selected sensor comprises a battery chemistry detector.

25. The method of claim 16, further including the steps of:

activating an I/O device coupled between the controller and the first selected sensor prior to collecting sensor data from the first selected sensor; and

deactivating the I/O device after collecting sensor data from the first selected sensor.

26. The method of claim 25, wherein the step of activating the I/O device includes the step of supplying power to the I/O device and the step of deactivating the I/O device includes the step of removing power from the I/O device.

27. The method of claim 25, wherein the I/O device is adapted to be placed in a sleep mode or in an operational mode where the I/O device consumes a reduced amount of power in the sleep mode and the step of activating the I/O device includes the step of placing the I/O device in the operational mode and the step of deactivating the I/O device includes the step of placing the I/O device in the sleep mode.

28. The method of claim 27, further including the steps of:

initializing the I/O device; and

placing the I/O device in the sleep mode.

29. The method of claim 25, wherein the I/O device comprises an A/D converter.