System and method for correlative sampling and compression of quasi-periodic machine parameter sensor data in an industrial facility

• US 9,497,569 B2
• Filed: 03/12/2014
• Issued: 11/15/2016
• Est. Priority Date: 03/12/2014
• Status: Active Grant

• Current Assignee: Uptime Solutions, LLC
• Original Assignee: UpTime Solutions
• Inventors: Girardeau, James
• Primary Examiner(s): Jiang, Charles C
• Assistant Examiner(s): Soe, Kyaw Z
• Application Number:
  US14/205,750
• Publication Number:
  US 20150264586A1
• Time in Patent Office: 979 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G01R 23/00 Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]

Abstract

A sensor sampling system comprises a base station and a field unit. The field unit receives a quasi-periodic signal representing machine parameters monitored by a machine sensor, and samples a first portion of the quasi-periodic signal to generate a first reference waveform. The field unit subsequently samples a second portion of the quasi-periodic signal to generate a first sample waveform. Finally, the field unit generates a first delta data set representing a difference between the first reference waveform and the first sample waveform and wirelessly transmits a representation of the first delta data set for reception by the base station.

Claims

1. A method comprising:

receiving, at a field unit, a quasi-periodic signal representing machine parameters monitored by a machine sensor;

sampling, at the field unit, a first portion of the quasi-periodic signal to generate a first reference waveform;

sampling, at the field unit, a second portion of the quasi-periodic signal to generate a first sample waveform;

generating, at the field unit, a first delta data set representing a difference between the first reference waveform and the first sample waveform;

compressing the first delta data set to generate a compressed delta data set; and

wirelessly transmitting a representation of the compressed delta data set from the field unit for reception by a base station.

2. The method of claim 1, further comprising:

determining an autocorrelation for the quasi-periodic signal; and

wherein sampling the first portion of the quasi-periodic signal comprises sampling the first portion of the quasi-periodic signal based on the autocorrelation.

3. The method of claim 1, wherein generating the first delta data set comprises:

phase-aligning the first reference waveform and the first sample waveform based on an autocorrelation of the quasi-periodic signal; and

determining the first delta data set based on a difference between the phase-aligned first reference and first sample waveforms.

4. The method of claim 1, further comprising:

performing a noise-suppression process on the first delta data set prior to compressing the first delta data set.

5. The method of claim 1, further comprising:

wirelessly transmitting a representation of the first reference waveform for reception by the base station.

6. The method of claim 5, further comprising:

storing, at the base station, the representation of the first reference waveform; and

generating, at the base station, a representation of the first sample waveform based on the stored first reference waveform and the first delta data set.

9. The method of claim 1, further comprising:

generating, at the base station, a representation of the first sample waveform based on the first reference waveform and the first delta data set.

7. A method comprising:

receiving, at a field unit, a quasi-periodic signal representing machine parameters monitored by a machine sensor;

sampling, at a field unit, a first portion of the quasi-periodic signal to generate a first reference waveform,

sampling, at a field unit, a second portion of the quasi-periodic signal to generate a first reference waveform,

generating, at the field unit, a first delta data set representing a difference between the first reference waveform and the first sample waveform; and

wirelessly transmitting a representation of the first delta data set from the field unit for reception by a base station;

wirelessly transmitting a representation of the first reference waveform for reception by a base station;

sampling, at the field unit, a third portion of the quasi-periodic signal to generate a second reference waveform;

wirelessly transmitting a representation of the second reference waveform for reception by the base station; and

storing the first and second reference waveforms at the base station.

8. The method of claim 7, further comprising:

sampling, at the field unit, a fourth portion of the quasi-periodic signal to generate a second sample waveform;

generating, at the field unit, a second delta data set representing a difference between the second reference waveform and the second sample waveform;

wirelessly transmitting a representation of the second delta data set from the field unit for reception by the base station;

wherein wirelessly transmitting the representation of the first delta data set includes wirelessly transmitting a first identifier associated with the first reference waveform for reception by the base station; and

wherein wirelessly transmitting the representation of the second delta data set includes wirelessly transmitting a second identifier associated with the second reference waveform for reception by the base station.

10. A method comprising:

receiving, at a field unit, a quasi-periodic signal representing machine parameters monitored by a machine sensor;

sampling, at a field unit, a first portion of the quasi-periodic signal to generate a first reference waveform,

sampling, at a field unit, a second portion of the quasi-periodic signal to generate a first reference waveform,

generating, at the field unit, a first delta data set representing a difference between the first reference waveform and the first sample waveform; and

wirelessly transmitting a representation of the first delta data set from the field unit for reception by a base station;

wirelessly transmitting a representation of the first reference waveform for reception by a base station;

sampling, at the field unit, a third portion of the quasi-periodic signal to generate a second sample waveform;

generating, at the field unit, a second delta data set representing a difference between the first reference waveform and the second sample waveform; and

wirelessly transmitting a representation of the second delta data set from the field unit for reception by the base station.

11. A non-transitory computer readable storage medium embodying a set of executable instructions, the set of executable instructions to manipulate at least one processor to:

receive, at a field unit, a quasi-periodic signal representing machine parameters monitored by a machine sensor;

sample, at the field unit, a first portion of the quasi-periodic signal to generate a first reference waveform;

sample, at the field unit, a second portion of the quasi-periodic signal to generate a first sample waveform;

generate, at the field unit, a first delta data set representing a difference between the first reference waveform and the first sample waveform;

compress, at the field unit, the first delta data set to generate a compressed delta data set; and

wirelessly transmit a representation of the compressed delta data set from the field unit for reception by a base station.

12. A system comprising:

a base station; and

a field unit, the field unit to;

receive a quasi-periodic signal representing machine parameters monitored by a machine sensor;

sample a first portion of the quasi-periodic signal to generate a first reference waveform;

sample a second portion of the quasi-periodic signal to generate a first sample waveform;

generate a first delta data set representing a difference between the first reference waveform and the first sample waveform;

compress the first delta data set to generate a compressed delta data set; and

wirelessly transmit a representation of the compressed delta data set for reception by the base station.

13. The system of claim 12, wherein:

the field unit further is to determine an autocorrelation for the quasi-periodic signal; and

the field unit is to sample the first portion of the quasi-periodic signal by sampling the first portion of the quasi-periodic signal based on the autocorrelation.

14. The system of claim 12, wherein the field unit is to generate the first delta data set by:

phase-aligning the first reference waveform and the first sample waveform based on an autocorrelation of the quasi-periodic signal; and

determining the first delta data set based on a difference between the phase-aligned reference and first sample waveforms.

15. The system of claim 12, wherein the field unit further is to:

perform a noise-suppression process on the first delta data set prior to compressing the first delta data set.

16. The system of claim 12, wherein the field unit further is to:

wirelessly transmit a representation of the first reference waveform for reception by the base station.

17. The system of claim 16, wherein the base station is to:

store the representation of the first reference waveform; and

generate a representation of the first sample waveform based on the stored first reference waveform and the first delta data set.

20. The system of claim 12, wherein the base unit is to:

generate a representation of the first sample waveform based on the first reference waveform and the representation of the first delta data set.

22. The system of claim 12, wherein the field unit comprises at least one battery.

18. A system comprising:

a base station;

a field unit, the field unit to;

receive a quasi-periodic signal representing machine parameters monitored by a machine sensor;

sample a first portion of the quasi-periodic signal to generate a first reference waveform;

sample a second portion of the quasi-periodic signal to generate a first sample waveform;

generate a first delta data set representing a difference between the first reference waveform and the first sample waveform;

wirelessly transmit a representation of the first delta data set for reception by the base station;

sample a third portion of the quasi-periodic signal to generate a second reference waveform; and

wirelessly transmit a representation of the second reference waveform for reception by the base station; and

the base station is to store the first and second reference waveforms.

19. The system of claim 18, wherein the field unit further is to:

sample a fourth portion of the quasi-periodic signal to generate a second sample waveform;

generate a second delta data set representing a difference between the second reference waveform and the second sample waveform;

wirelessly transmit a representation of the second delta data set for reception by the base station;

wirelessly transmit a first identifier associated with the first reference waveform with the wireless transmission of the representation of the first delta data set for reception by the base station; and

wirelessly transmit a second identifier associated with the second reference waveform with the wireless transmission of the representation of the second delta data set for reception by the base station.

21. A system comprising:

a base station;

a field unit, the field unit to;

receive a quasi-periodic signal representing machine parameters monitored by a machine sensor;

sample a first portion of the quasi-periodic signal to generate a first reference waveform;

sample a second portion of the quasi-periodic signal to generate a first sample waveform;

generate a first delta data set representing a difference between the first reference waveform and the first sample waveform;

wirelessly transmit a representation of the first delta data set for reception by the base station;

sample a third portion of the quasi-periodic signal to generate a second sample waveform;

generate a second delta data set representing a difference between the first reference waveform and the second sample waveform; and

wirelessly transmit a representation of the second delta data set from the field unit for reception by the base station.