Hardware sensor system for improved sleep detection
A hardware sensor system comprising a piezo sensor outputting charge data corresponding to a motion, an insulated cable from the piezo sensor to a receiver, to transmit the charge data, an insulated charge to voltage converter on the receiver, the insulated charge to voltage converter converting the charge data to voltage data, an analog-to-digital converter to convert the voltage data to digital data, and an uploader to upload the data to a server for processing.
1. A hardware sleep sensor system comprising:
a piezo sensor outputting charge data corresponding to a motion;
an insulated cable from the piezo sensor to a receiver, to transmit the charge data;
a charge to voltage converter on the receiver, the charge to voltage converter for converting the charge data to voltage data;
an analog-to-digital converter to convert the voltage data to digital data;
an uploader to upload the digital data to a server for processing, the server to determine a level of use of the sleep sensor system; and
a downsampler configured to receive a down-sampling rate calculated based on the level of use of the sleep sensor system, wherein the level of use is one of: not in use, limited analysis use, and full use;
the downsampler further configured to down-sample the output of the analog-to-digital converter using the down-sampling rate, and provide the down-sampled data to the uploader.
2. The system of claim 1 , further comprising:
an insulated plug in the receiver to connect the insulated cable to the receiver.
3. The system of claim 1 , wherein the charge to voltage converter is insulated.
4. The system of claim 1 , wherein the piezo sensor, a plug in the receiver connected to the insulated cable, and the charge to voltage converter are on an insulated portion of the receiver.
5. The system of claim 4 , wherein the insulated portion of the receiver is insulated with a metal enclosure.
6. The system of claim 1 , further comprising:
an electrostatic discharge protector coupled to the insulated cable.
7. The system of claim 1 , wherein the analog-to-digital converter converts analog voltage data to digital voltage data and outputs the digital voltage data to a lossless algorithm to convert the digital voltage data to compressed data.
8. The system of claim 7 , wherein the lossless algorithm is FLAC (Free Lossless Audio Codec), and the analog-to-digital converter is an audio codec.
9. The system of claim 1 , wherein the piezo sensor comprises two piezo sensors outputting charge data; and
wherein the analog-to-digital converter is a two-channel converter to provide concurrent sampling of the charge data from the two piezo sensors.
10. The system of claim 1 , wherein the down-sampling rate is one of a plurality of selectable down-sampling rates and wherein:
the not in use level is defined as no user data being measured;
the limited analysis use level is defined as measuring: sleep state, heart rate and breathing rate; and
the full use level is defined as measuring the sleep state, the heart rate, and the breathing rate, and further measuring one or more of: snore detection, respiratory events, and heart rate variability.
11. The system of claim 10 , wherein: the down-sampling rate is 0.5 Hz to 5 Hz for the not in use level; is 30 Hz to 100 Hz for the limited analysis use level; and is 100 Hz to 500 Hz for the full use level.
12. A hardware sleep sensor system comprising a receiver to upload data to a server for analysis, the receiver comprising:
an insulated plug to receive an insulated cable, the insulated cable carrying charge data from a piezo sensor;
a charge to voltage converter for converting the charge data to voltage data;
an analog-to-digital converter to convert the voltage data to digital data;
a down-sampler configured to receive a down-sampling rate, the down-sampling rate calculated based on a current level of use of the sleep sensor system, the current level of use being one of: not in use level, limited analysis use level, and full use level, the down-sampler further configured to down-sample the digital data using the down-sampling rate; and
an uploader to upload the down-sampled digital data to a server for processing, the server to determine the current level of use of the sleep sensor system, based on the down-sampled digital data.
13. The system of claim 12 , further comprising:
an electrostatic discharge protector coupled to the insulated cable.
14. The system of claim 12 , wherein the analog-to-digital converter comprises a FLAC audio codec that implements lossless compression of the voltage data to digital data.
15. The system of claim 12 , wherein the piezo sensor comprises:
two piezo sensors outputting charge data; and
wherein the analog-to-digital converter is a two-channel converter to provide concurrent sampling of the charge data from the two piezo sensors.
16. The system of claim 15 , wherein:
the not in use level is defined as no user data being measured;
the limited analysis use level is defined as measuring one or more of: sleep state, heart rate, and breathing rate; and
the full use level is defined as measuring the sleep state, the heart rate, and the breathing rate, and further measuring one or more of: snore detection, respiratory events, and heart rate variability.
17. A hardware sleep sensor system comprising:
a piezo sensor outputting charge data corresponding to a motion;
an insulated cable from the piezo sensor to a receiver, to transmit the charge data;
the receiver comprising:
a charge to voltage converter on the receiver, the charge to voltage converter for converting the charge data to voltage data;
an analog-to-digital converter to convert the voltage data to digital data;
an uploader to upload the digital data to a server for processing;
a server to analyze the digital data to determine a user's sleep status, and to send control signals to the receiver; and
a downsampler, to down-sample the output of the analog-to-digital converter and provide the down-sampled data to the server, wherein the down-sampler is configured to receive a down-sampling rate selected from a plurality of selectable down-sampling rates, the received down-sampling rate selected based on a current level of use of the sleep sensor system as determined by the server, the current level of use being one of: not in use level, limited analysis use level, and full use level.
18. The hardware sleep sensor system of claim 1 , wherein the uploader uploads the digital data to the server at an upload time interval specified by the server.
19. The hardware sleep sensor system of claim 1 , wherein the uploader uploads the digital data to the server when a predetermined amount of digital data is accumulated by the uploader.
20. The system of claim 1 , wherein the uploader receives data from the server indicating a current state of the hardware sleep sensor system and the uploader is configured to determine the down-sampling rate in accordance with the current level of use of the hardware sleep sensor system, wherein:
the not in use level is defined as no user data being measured;
the limited analysis use level is defined as measuring: sleep state, heart rate and breathing rate; and
the full use level is defined as measuring the sleep state, the heart rate, and the breathing rate, and further measuring one or more of: snore detection, respiratory events, and heart rate variability.