Vaporization device with lip sensing
Apparatuses, including systems and devices (“vaporizers”), for vaporizing material to form an inhalable aerosol that include capacitive lips sensing to regulate the temperature of the vaporizer, including transiently boosting the temperature. Methods of operating a vaporizer having a capacitive lip sensor are also described.
1. A vaporizer device, comprising:
a reservoir configured to hold a vaporizable material;
a heater configured to heat the vaporizable material;
a mouthpiece in communication with the reservoir;
a capacitance sensor configured to output a plurality of sensor readings; and
a controller configured to:
detect use of the vaporizer device by a user via the capacitance sensor, wherein the use comprises contact with the mouthpiece; and
regulate a temperature of the heater to a preselected temperature by at least applying a temperature control loop having inputs including a running average of the plurality of sensor readings, the temperature of the heater, and the preselected temperature.
2. The vaporizer device of claim 1 , wherein the temperature control loop comprises a proportional integral derivative control algorithm.
3. The vaporizer device of claim 1 , wherein the controller is further configured to increase the temperature of the heater over the preselected temperature based at least on the plurality of sensor readings.
4. The vaporizer device of claim 1 , wherein the controller is further configured to:
reduce the temperature of the heater by a first predetermined step amount when no contact with the mouthpiece is detected for greater than a first idle period; and
reduce the temperature of the heater again by the first predetermined step amount when no contact is detected for a continuing idle period in addition to the first idle period.
5. The vaporizer device of claim 1 , wherein the preselected temperature is selected from a plurality of predetermined temperature settings.
6. The vaporizer device of claim 1 , wherein the use of the vaporizer device is detected based on the plurality of sensor readings meeting a threshold reading.
7. The vaporizer device of claim 1 , wherein the controller is further configured to override the temperature control loop to heat the heater to a first override temperature based on the plurality of sensor readings meeting a threshold reading.
8. The vaporizer device of claim 7 , wherein the first override temperature is higher than the preselected temperature.
9. The vaporizer device of claim 7 , wherein the controller is further configured to heat the heater to a second override temperature based on the plurality of sensor readings continuing to meet the threshold reading after a threshold period of time.
10. The vaporizer device of claim 9 , wherein the second override temperature is different from the first override temperature.
11. The vaporizer device of claim 9 , wherein the controller is further configured to maintain the second override temperature based on a continued detection of continued use of the vaporizer device by the user via the capacitance sensor, wherein the continued use comprises contact with the mouthpiece at a second time point after the use of the vaporizer device.
12. The vaporizer device of claim 1 , wherein the controller is further configured to increase the temperature of the heater based on a first sensor reading of the plurality of sensor readings meeting a threshold.
13. The vaporizer device of claim 1 , wherein the controller is further configured to increase the temperature of the heater to an override temperature for a boost time period, when a difference between a first sensor reading of the plurality of sensor readings and a baseline sensor reading meets a threshold value.
14. A method, comprising:
detecting, via a capacitance sensor coupled to a vaporizer device, use of the vaporizer device by a user, the use comprising contact with a mouthpiece the vaporizer device, the vaporizer device comprising:
a reservoir configured to hold a vaporizable material;
a heater configured to heat the vaporizable material;
the mouthpiece in communication with the reservoir;
the capacitance sensor configured to output a plurality of sensor readings; and
regulating a temperature of the heater to a preselected temperature by at least applying a temperature control loop having inputs including a running average of the plurality of sensor readings, the temperature of the heater, and the preselected temperature.
15. The method of claim 14 , wherein the temperature control loop comprises a proportional integral derivative control algorithm.
16. The method of claim 14 , further comprising increasing the temperature of the heater over the preselected temperature based at least on the plurality of sensor readings.
17. The method of claim 14 , further comprising:
reducing the temperature of the heater by a first predetermined step amount when no contact with the mouthpiece is detected for greater than a first idle period; and
reducing the temperature of the heater again by the first predetermined step amount when no contact is detected for a continuing idle period in addition to the first idle period.
18. The method of claim 14 , wherein the preselected temperature is selected from a plurality of predetermined temperature settings.
19. The method of claim 14 , wherein the use of the vaporizer device is detected based on the plurality of sensor readings meeting a threshold reading.