Hall effect current sensor for an aerosol delivery device

• US 10,258,086 B2
• Filed: 01/12/2016
• Issued: 04/16/2019
• Est. Priority Date: 01/12/2016
• Status: Active Grant

• Current Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Original Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Inventors: Sur, Rajesh
• Primary Examiner(s): Chou, Jimmy
• Application Number:
  US14/993,762
• Publication Number:
  US 20170196263A1
• Time in Patent Office: 1,190 Days
• Field of Search: 131328, 131329, 131330, 131200, 131273, 131359, 219601, 219607, 219609, 219611, 219624, 219628, 219629, 219630, 219634, 219635, 219643, 219644, 219675
• CPC Class Codes: A24F 40/10 Devices using liquid inhalable precursors
• CPC Class Codes: A24F 40/51 Arrangement of sensors
• CPC Class Codes: G01R 15/202 using Hall-effect devices Hall elements in arrangements for measuring electrical power G01R21/08
• CPC Class Codes: H05B 1/0244 Heating of fluids H05B1/0247 takes precedence

Abstract

An aerosol delivery device is provided that includes a housing defining a reservoir configured to retain aerosol precursor composition. The aerosol delivery device also includes a plurality of electronic components interconnected by or connected to one or more conductors, and these electronic components include a heating element, a control component and a Hall effect current sensor. The control component is configured to operate in an active mode in which the control component is configured to control the heating element to activate and vaporize components of the aerosol precursor composition. The Hall effect current sensor is positioned proximate a conductor of the one or more conductors, and configured to measure to a current through the conductor. And the control component is configured to control operation of at least one functional element of the aerosol delivery device in response to the current so measured.

Claims

1. An aerosol delivery device comprising:

a housing defining a reservoir configured to retain aerosol precursor composition; and

a plurality of electronic components interconnected by or connected to one or more conductors, the plurality of electronic components including;

a heating element;

a control component including a processor core configured to operate in an active mode in which the control component is configured to control the heating element to activate and vaporize components of the aerosol precursor composition; and

a Hall effect current sensor positioned proximate one of the one or more conductors, and configured to measure a current through the one of the one or more conductors, the control component being configured to control operation of the heating element or a power source therefor in response to the current measured,

wherein the one of the one or more conductors is connected to a terminal that is connected or connectable with the power source, the control component in the active mode being configured to direct power from the power source to the heating element to activate and vaporize components of the aerosol precursor composition, and

wherein the control component being configured to control operation of the heating element or the power source includes being configured to cut off the power source in an instance in which the current measured by the Hall effect sensor is above a threshold level indicative of an over-current or over-voltage condition.

2. The aerosol delivery device of claim 1 further comprising a second Hall effect current sensor positioned proximate a second conductor of the one or more conductors, the second conductor being connected to the heating element or connected a terminal that is connected or connectable with the heating element, and

wherein the second Hall effect current sensor is configured to measure to a current through the second conductor that corresponds to a current through the heating element in the active mode, the control component being configured to further control operation of the heating element or the power source in response to the current measured by the second Hall effect current sensor.

3. The aerosol delivery device of claim 2, wherein the control component being configured to control operation of the heating element or the power source in response to the current measured by the second Hall effect current sensor includes in the active mode being configured to at least:

direct power to the heating element to turn the heating element on and thereby control the heating element to activate and vaporize components of the aerosol precursor composition, and commensurately initiate a heating time period; and

at a periodic rate until expiration of the heating time period,

determine a moving window of measurements of instantaneous actual power directed to the heating element, each measurement of the window of measurements being determined as a product of a voltage at the heating element and the current through the heating element;

calculate a simple moving average power directed to the heating element based on the moving window of measurements of instantaneous actual power; and

adjust the power directed to the heating element to turn the heating element off or on at the periodic rate at each instance in which the simple moving average power is respectively above or below a selected power set point.

4. A control body coupled or coupleable with a cartridge that is equipped with a heating element and contains an aerosol precursor composition, the control body being coupled or coupleable with the cartridge to form an aerosol delivery device in which the heating element is configured to activate and vaporize components of the aerosol precursor composition, the control body comprising:

a plurality of electronic components interconnected by or connected to one or more conductors, the plurality of electronic components including;

a control component including a processor core configured to operate in an active mode in which the control body is coupled with the cartridge, the control component in the active mode being configured to control the heating element to activate and vaporize components of the aerosol precursor composition; and

a Hall effect current sensor positioned proximate one of the one or more conductors, and configured to measure a current through the one of the one or more conductors, the control component being configured to control operation of the heating element or a power source therefor in response to the current measured,

wherein the one of the one or more conductors is connected to a terminal that is connected or connectable with the power source, the control component in the active mode being configured to direct power from the power source to the heating element to activate and vaporize components of the aerosol precursor composition, and

wherein the control component being configured to control operation of the heating element or the power source includes being configured to cut off the power source in an instance in which the current measured by the Hall effect sensor is above a threshold level indicative of an over-current or over-voltage condition.

5. The control body of claim 4 further comprising a second Hall effect current sensor positioned proximate a second conductor of the one or more conductors, the second conductor being connected to a terminal that is connected or connectable with the heating element, and

wherein the second Hall effect current sensor is configured to measure to a current through the second conductor that corresponds to a current through the heating element in the active mode in which the control body is coupled with the cartridge, the control component being configured to further control operation of the heating element or the power source in response to the current measured by the second Hall effect current sensor.

6. The control body of claim 5, wherein the control component being configured to control operation of the heating element or the power source in response to the current measured by the second Hall effect current sensor includes in the active mode being configured to at least:

direct power to the heating element to turn the heating element on and thereby control the heating element to activate and vaporize components of the aerosol precursor composition, and commensurately initiate a heating time period; and

at a periodic rate until expiration of the heating time period,

determine a moving window of measurements of instantaneous actual power directed to the heating element, each measurement of the window of measurements being determined as a product of a voltage at the heating element and the current through the heating element;

calculate a simple moving average power directed to the heating element based on the moving window of measurements of instantaneous actual power; and

adjust the power directed to the heating element to turn the heating element off or on at the periodic rate at each instance in which the simple moving average power is respectively above or below a selected power set point.

7. A cartridge coupled or coupleable with a control body that is equipped with a control component including a processor core, the control body being coupled or coupleable with the cartridge to form an aerosol delivery device, the cartridge comprising:

a housing defining a reservoir configured to retain aerosol precursor composition; and

a plurality of electronic components interconnected by or connected to one or more conductors, the plurality of electronic components including;

a heating element configured to operate in an active mode in which the cartridge is coupled with the control body, the heating element in the active mode being controllable by the control component to activate and vaporize components of the aerosol precursor composition; and

a Hall effect current sensor positioned proximate one of the one or more conductors, and configured to measure a current through the one of the one or more conductors, the control component being configured to control operation of the heating element or a power source therefor in response to the current measured,

wherein the one of the one or more conductors is connected to a terminal that is connected or connectable with the power source, the control component in the active mode being configured to direct power from the power source to the heating element to activate and vaporize components of the aerosol precursor composition, and

wherein the control component being configured to control operation of the heating element or the power source includes being configured to cut off the power source in an instance in which the current measured by the Hall effect sensor is above a threshold level indicative of an over-current or over-voltage condition.

8. The cartridge of claim 7 further comprising a second Hall effect current sensor positioned proximate a second conductor of the one or more conductors, the second conductor being connected to the heating element, and

wherein the second Hall effect current sensor is configured to measure to a current through the second conductor that corresponds to a current through the heating element in the active mode in which the control body is coupled with the cartridge, the control component being configured to further control operation of the heating element or the power source in response to the current measured by the second Hall effect current sensor.

9. The cartridge of claim 8, wherein the control component being configured to control operation of the heating element or the power source in response to the current measured by the second Hall effect current sensor includes in the active mode being configured to at least:

direct power to the heating element to turn the heating element on and thereby control the heating element to activate and vaporize components of the aerosol precursor composition, and commensurately initiate a heating time period; and

at a periodic rate until expiration of the heating time period,

determine a moving window of measurements of instantaneous actual power directed to the heating element, each measurement of the window of measurements being determined as a product of a voltage at the heating element and the current through the heating element;

calculate a simple moving average power directed to the heating element based on the moving window of measurements of instantaneous actual power; and

adjust the power directed to the heating element to turn the heating element off or on at the periodic rate at each instance in which the simple moving average power is respectively above or below a selected power set point.