Inflatable air mattress system with detection techniques
In one example, this disclosure describes a method including receiving, at a central controller of an air mattress system, a plurality of air pressure value, determining a plurality of average values using the plurality of the received air pressure values, calculating a difference value between a first one of the plurality of average values and a second one of the plurality of average values, comparing the difference value to a threshold value, determining, based on the comparison, whether a user of the air mattress system moved.
1. A method comprising:
receiving, at a central controller of an air mattress system having a mattress comprising a first-side to support a first-side user and a second-side to simultaneously support a second-side user, a plurality of air pressure values from a single pressure sensor configured to sense pressure changes on the mattress i) in the first-side caused by the first-side user laying on the mattress and also ii) in the second-side caused by the second-side user laying on the mattress, wherein the mattress comprises a first chamber and a second chamber, the first chamber corresponding to the first-side of the air mattress and the second chamber corresponding to the second-side of the air mattress;
determining a plurality of average values using the plurality of the received air pressure values;
calculating a difference value between a first one of the plurality of average values and a second one of the plurality of average values;
comparing the difference value to a threshold value; and
simultaneously:
determining, based on the comparison, whether the first-side user of the air mattress system is present on the air mattress system;
determining, based on the comparison, whether the first-side user of the air mattress system moved;
determining, based on the comparison, whether the second-side user of the air mattress system is present on the air mattress system; and
determining, based on the comparison, whether the second-side user of the air mattress system moved.
2. The method of claim 1 , wherein the plurality of average values comprises a rolling average of pressure values.
3. The method of claim 2 , wherein the plurality of average values further comprises variations in the rolling average of pressure values.
4. The method of claim 1 , wherein determining whether the first-side user of the air matters system moved further comprises determining the first-side user's sleep state out of a group of possible sleep states.
5. The method of claim 4 , wherein the group of possible sleep states includes, but is not limited to, a Rapid Eye Movement (REM) state and a Non-Rapid Eye Movement (NREM) state.
6. The method of claim 1 , wherein determining whether the first-side user of the air matters system moved further comprises determining the first-side user's sleep position out of a group of possible sleep positions.
7. The method of claim 6 , wherein the group of possible sleep positions includes, but is not limited to, a laying-on-side sleep position, a laying-on-back sleep position, and a laying-on-front sleep position.
8. A system comprising:
a mattress having a first-side to support a first-side user and a second-side to simultaneously support a second-side user, wherein the mattress comprises a first chamber and a second chamber, the first chamber corresponding to the first-side of the mattress and the second chamber corresponding to the second-side of the mattress;
a single pressure sensor, the pressure sensor configured to sense pressure changes on the mattress i) in the first-side caused by the first-side user laying on the mattress and also ii) in the second-side caused by the second-side user laying on the mattress;
a processor configured to:
receive, from the pressure sensor, a plurality of pressure values;
calculate, from the plurality of pressure values, a plurality of calculated values; and
simultaneously:
classify, using the plurality of calculated values, the first-side user into one of two or more possible movement classifications;
classify, using the plurality of calculated values, the first-side user into one of two or more possible presence classifications;
classify, using the plurality of calculated values, the second-side user into one of two or more possible movement classifications; and
classify, using the plurality of calculated values, the second-side user into one of two or more possible presence classifications.
9. The system of claim 8 , wherein the plurality of calculated values comprises a rolling average of pressure values.
10. The system of claim 9 , wherein the plurality of calculated values further comprises variations in the rolling average of pressure values.
11. The system of claim 8 , wherein the processor is further configured to simultaneously determine the first-side user's sleep state out of a group of possible sleep states.
12. The system of claim 11 , wherein the group of possible sleep states includes, but is not limited to, a Rapid Eye Movement (REM) state and a Non-Rapid Eye Movement (NREM) state.
13. The system of claim 8 , wherein the processor is further configured to simultaneously determine the first-side user's sleep position out of a group of possible sleep positions.
14. The system of claim 13 , wherein the group of possible sleep positions includes, but is not limited to, a laying-on-side sleep position, a laying-on-back sleep position, and a laying-on-front sleep position.
15. The system of claim 8 , the system further comprising:
a first-side tube that fluidly connects the single pressure sensor to the first-side;
a second-side tube that fluidly connects the single pressure sensor to the second-side;
a first-side valve and a second-side valve operable to regulate flow of fluid in the first-side tube and the second-side tube.
16. The system of claim 8 , wherein the plurality of pressure values comprise both i) some pressure values corresponding to the first-side tube and ii) some other pressure values corresponding to the second-side tube.